/* ─────────────────────────────────────────────────────────────────────────────
   Design Tokens — Light Mode
───────────────────────────────────────────────────────────────────────────── */
:root {
  /* IEEE conference palette */
  --primary-blue: #0A4E9B;
  --dark-blue:    #003366;
  --light-blue:   #DDEEFF;
  --white:        #FFFFFF;
  --light-grey:   #F5F5F5;
  --border:       #CCCCCC;
  --text:         #222222;

  /* Existing semantic aliases */
  --ink:          var(--text);
  --ink-strong:   var(--dark-blue);
  --ink-soft:     rgba(34,34,34,0.78);
  --ink-muted:    rgba(34,34,34,0.62);
  --paper:        var(--white);
  --surface:      var(--white);
  --surface-soft: var(--light-grey);
  --surface-alt:  var(--light-grey);
  --line:         var(--border);
  --line-strong:  var(--primary-blue);
  --accent:       var(--primary-blue);
  --accent-strong:var(--dark-blue);
  --accent-blue:  var(--primary-blue);
  --text-accent:  var(--dark-blue);
  --muted-accent: var(--primary-blue);
  --accent-line:  var(--border);
  --accent-line-soft: var(--border);
  --accent-surface: var(--light-blue);
  --accent-surface-strong: var(--light-blue);
  --navy:         var(--dark-blue);
  --navy-mid:     var(--primary-blue);

  /* Subtle, traditional UI effects */
  --shadow:       0 1px 2px rgba(0,0,0,0.08);
  --shadow-soft:  0 1px 2px rgba(0,0,0,0.06);
  --accent-glow:  var(--shadow-soft);
  --accent-glow-hover: var(--shadow);

  /* Shape */
  --radius:       3px;
  --radius-lg:    4px;
  --radius-sm:    2px;
  --container:    1120px;
  --container-wide: 1280px;
  --font-heading: Georgia, "Times New Roman", Times, serif;
  --font-body: Arial, Verdana, sans-serif;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Dark Mode Tokens
───────────────────────────────────────────────────────────────────────────── */
[data-theme="dark"] {
  --ink:          var(--text);
  --ink-strong:   var(--dark-blue);
  --ink-soft:     rgba(34,34,34,0.78);
  --ink-muted:    rgba(34,34,34,0.62);
  --paper:        var(--white);
  --surface:      var(--white);
  --surface-soft: var(--light-grey);
  --surface-alt:  var(--light-grey);
  --line:         var(--border);
  --line-strong:  var(--primary-blue);
  --shadow:       0 1px 2px rgba(0,0,0,0.08);
  --shadow-soft:  0 1px 2px rgba(0,0,0,0.06);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Reset & Base
───────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body::selection { background: var(--light-blue); }

a  { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
}

/* Focus visible ring */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Scroll Progress Bar
───────────────────────────────────────────────────────────────────────────── */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  height: 3px;
  width: 0%;
  background: var(--primary-blue);
  box-shadow: none;
  transition: width 80ms linear;
  pointer-events: none;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Dark Mode Toggle
───────────────────────────────────────────────────────────────────────────── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: #FFFFFF;
  border-radius: 50%;
  cursor: pointer;
  color: currentColor;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease, box-shadow 160ms ease, color 160ms ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--accent-line);
  background: var(--accent-surface);
  color: var(--accent);
  transform: none;
}

[data-theme="dark"] .theme-toggle {
  border-color: var(--line);
  background: #FFFFFF;
}

.theme-toggle svg { width: 18px; height: 18px; pointer-events: none; }

/* ─────────────────────────────────────────────────────────────────────────────
   Header & Navigation
───────────────────────────────────────────────────────────────────────────── */
.site-header {
  position: relative;
  z-index: 20;
  color: var(--ink);
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 18px;
  width: min(calc(100% - 32px), var(--container-wide));
  margin: 0 auto;
  padding: 10px 0;
}

.brand-logos {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand-logo,
.conference-mark {
  width: 82px;
  height: 50px;
  object-fit: contain;
  border: 1px solid var(--border);
  background: #FFFFFF;
  padding: 5px 7px;
}

.conference-mark {
  display: grid;
  place-items: center;
  color: var(--dark-blue);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.05;
  text-align: center;
  letter-spacing: 0;
}

.brand strong {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.05rem, 2.1vw, 1.55rem);
  line-height: 1.2;
  letter-spacing: 0;
  color: var(--dark-blue);
}

.brand small {
  display: block;
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.35;
}

.nav-row {
  background: var(--primary-blue);
}

.site-nav {
  width: min(calc(100% - 32px), var(--container-wide));
  margin: 0 auto;
  color: #FFFFFF;
  font-size: 0.88rem;
  font-weight: 600;
}

.nav-menu,
.submenu {
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-menu {
  display: flex;
  align-items: stretch;
}

.nav-menu > li,
.submenu li {
  position: relative;
}

.site-nav a {
  display: flex;
  align-items: center;
  min-height: 38px;
  padding: 9px 13px;
  color: #FFFFFF;
  line-height: 1.2;
  white-space: nowrap;
  transition: background 140ms ease, color 140ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  background: var(--dark-blue);
  color: #FFFFFF;
}

.has-submenu > a::after {
  content: "";
  width: 0;
  height: 0;
  margin-left: 7px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
}

.submenu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 30;
  display: none;
  min-width: 210px;
  border: 1px solid #8FB3DA;
  background: #FFFFFF;
  box-shadow: var(--shadow);
}

.submenu .submenu {
  top: -1px;
  left: 100%;
}

.submenu a {
  min-height: 36px;
  padding: 9px 12px;
  color: var(--dark-blue);
  border-bottom: 1px solid var(--border);
  background: #FFFFFF;
}

.submenu li:last-child > a {
  border-bottom: 0;
}

.submenu a:hover,
.submenu a:focus-visible,
.submenu a.is-active {
  color: #FFFFFF;
  background: var(--primary-blue);
}

.has-submenu:hover > .submenu,
.has-submenu:focus-within > .submenu {
  display: block;
}

.site-nav a.nav-cta,
.site-nav a.nav-cta:hover,
.site-nav a.nav-cta.is-active {
  background: var(--dark-blue);
  color: #FFFFFF;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* Mobile hamburger */
.menu-button {
  display: none;
  width: 40px;
  height: 36px;
  place-items: center;
  margin-left: auto;
  border: 1px solid rgba(255,255,255,0.55);
  background: var(--primary-blue);
  color: #FFFFFF;
  cursor: pointer;
  transition: background 160ms ease;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 3px auto;
  background: currentColor;
  transition: transform 220ms ease, opacity 220ms ease;
  border-radius: 2px;
}

.menu-button.is-open span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.menu-button.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-button.is-open span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ─────────────────────────────────────────────────────────────────────────────
   Hero Section
───────────────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  display: block;
  width: min(calc(100% - clamp(24px, 5vw, 64px)), var(--container-wide));
  margin: 0 auto 28px;
  padding: 112px clamp(18px, 4vw, 46px) 34px;
  color: var(--ink);
  background: #FFFFFF;
  border-top: 5px solid var(--primary-blue);
  border-left: 1px solid var(--accent-line-soft);
  border-right: 1px solid var(--accent-line-soft);
  border-bottom: 1px solid var(--accent-line-soft);
}

.hero::after {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  margin-top: 28px;
  background: var(--border);
}

.hero-banner {
  margin: 0 0 22px;
  padding: 8px 14px;
  border: 1px solid var(--primary-blue);
  background: var(--light-blue);
  color: var(--dark-blue);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0;
  text-align: center;
  text-transform: uppercase;
}

.hero-logo-row {
  display: grid;
  grid-template-columns: 160px minmax(86px, 112px) 160px;
  justify-content: center;
  align-items: center;
  gap: clamp(16px, 4vw, 42px);
  margin: 0 auto 22px;
}

.hero-logo-row img,
.hero-logo-seal {
  width: 100%;
  height: 82px;
  object-fit: contain;
  border: 1px solid var(--border);
  background: #FFFFFF;
  padding: 8px;
}

.hero-logo-seal {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-blue);
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.15;
  text-align: center;
}

.hero-content {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

/* Eyebrow badge */
.eyebrow {
  margin: 0 0 12px;
  color: var(--text-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-kicker {
  margin: 0 0 10px;
  color: var(--dark-blue);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 auto;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0;
  color: var(--dark-blue);
}

.hero-conference-code {
  margin: 8px 0 0;
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
}

.hero-details {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 24px 0 0;
  border: 1px solid var(--border);
  text-align: left;
}

.hero-details div {
  min-width: 0;
  padding: 13px 15px;
  border-right: 1px solid var(--border);
}

.hero-details div:last-child {
  border-right: 0;
}

.hero-details dt {
  color: var(--dark-blue);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-details dd {
  margin: 5px 0 0;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 22px;
}

/* Buttons */
.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--primary-blue);
  border-radius: var(--radius-sm);
  padding: 9px 17px;
  background: #FFFFFF;
  color: var(--dark-blue);
  font-weight: 700;
  font-size: 0.9rem;
}

.button.primary {
  border-color: var(--dark-blue);
  background: var(--navy);
  color: #FFFFFF;
}

.button.primary:hover {
  background: var(--dark-blue);
  color: #FFFFFF;
}

.button.secondary {
  background: #FFFFFF;
  color: var(--dark-blue);
}

.button.secondary:hover {
  background: var(--light-blue);
  color: var(--dark-blue);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Logo Strip — CSS Marquee
───────────────────────────────────────────────────────────────────────────── */
.logo-strip {
  position: relative;
  z-index: 2;
  padding: 0;
  background: #FFFFFF;
  border-bottom: 1px solid var(--accent-line-soft);
  border-left: 1px solid var(--accent-line-soft);
  border-right: 1px solid var(--accent-line-soft);
  overflow: hidden;
  width: min(calc(100% - clamp(24px, 5vw, 64px)), var(--container-wide));
  margin: 0 auto;
}

[data-theme="dark"] .logo-strip {
  background: #FFFFFF;
}

.logo-strip-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  gap: 0;
}

.logo-card {
  display: flex;
  min-height: 70px;
  width: clamp(210px, 24vw, 280px);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin: 0;
  padding: 10px 24px;
  border-right: 1px solid var(--line);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.logo-card:last-child {
  border-right: 0;
}

.logo-card:hover {
  background: var(--accent-surface);
  box-shadow: none;
}

.logo-card img {
  max-height: 52px;
  width: 100%;
  object-fit: contain;
  transition: filter 200ms ease;
}



/* ─────────────────────────────────────────────────────────────────────────────
   Section Shared Styles
───────────────────────────────────────────────────────────────────────────── */
.section {
  width: min(calc(100% - clamp(24px, 5vw, 64px)), var(--container-wide));
  margin: 0 auto;
  padding: clamp(38px, 5vw, 56px) clamp(22px, 4vw, 48px);
  border-left: 1px solid var(--accent-line-soft);
  border-right: 1px solid var(--accent-line-soft);
  border-bottom: 1px solid var(--accent-line-soft);
}

.section-heading {
  position: relative;
}

.section-heading::after {
  content: "";
  display: block;
  width: 74px;
  height: 2px;
  margin-top: 12px;
  border-radius: var(--radius);
  background: var(--accent);
}

.section > * {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.muted {
  background: var(--surface-alt);
}

[data-theme="dark"] .muted {
  background: var(--surface-alt);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 26px;
}

.section-heading.wide {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.55fr);
  align-items: end;
  gap: 24px;
  max-width: var(--container);
}

.section-heading.wide::after {
  grid-column: 1 / -1;
}

.section-heading h2,
.venue-copy h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.18;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-heading h2,
.venue-copy h2,
.registration-heading h2 {
}

.section-heading p:last-child,
.venue-copy p:last-child {
  margin: 0;
  color: var(--ink-soft);
}

/* ─────────────────────────────────────────────────────────────────────────────
   About Section
───────────────────────────────────────────────────────────────────────────── */
.intro-section {
  position: relative;
  overflow: hidden;
}

.intro-section::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  display: block;
  width: 4px;
  background: rgba(10,78,155,0.22);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.lead-copy {
  max-width: 920px;
  font-size: 1rem;
}

.lead-copy p:first-child { margin-top: 0; }

.lead-copy p { color: var(--ink-soft); }

.lead-copy p:first-child {
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.65;
  border-left: 3px solid var(--primary-blue);
  padding-left: 14px;
  margin-left: 0;
}

/* Quick links sidebar */
.quick-links {
  display: grid;
  align-self: start;
  border: 1px solid var(--accent-line-soft);
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

[data-theme="dark"] .quick-links {
  background: var(--surface);
}

.quick-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
  font-size: 0.94rem;
  transition: background 150ms ease, color 150ms ease, padding-left 150ms ease, box-shadow 150ms ease;
}

.quick-links a::after {
  content: "→";
  opacity: 0.4;
  font-size: 1rem;
  transition: transform 150ms ease, opacity 150ms ease;
}

.quick-links a:last-child { border-bottom: 0; }

.quick-links a:hover {
  background: var(--accent-surface);
  color: var(--accent-strong);
  padding-left: 20px;
  box-shadow: none;
}

.quick-links a:hover::after { transform: none; opacity: 1; }

.quick-links a.nav-cta {
  background: var(--navy);
  color: #FFFFFF;
  border-bottom: 0;
  border-radius: 0;
}

.quick-links a.nav-cta::after { color: rgba(255,255,255,0.7); }
.quick-links a.nav-cta:hover { background: #003366; padding-left: 20px; }

/* ─────────────────────────────────────────────────────────────────────────────
   Sponsorship
───────────────────────────────────────────────────────────────────────────── */
.sponsorship-section { overflow: hidden; }

.sponsorship-intro {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: -6px;
  margin-bottom: 20px;
}

.sponsorship-intro p {
  margin: 0;
  border: 1px solid var(--accent-line-soft);
  border-left: 3px solid var(--primary-blue);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--ink-soft);
  box-shadow: var(--shadow-soft);
}

.sponsorship-intro p:nth-child(2) {
  border-left-color: var(--primary-blue);
}

.sponsorship-packages {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.package-table {
  overflow: hidden;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.package-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.38fr);
  align-items: center;
  gap: 16px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.package-row:last-child { border-bottom: 0; }

.package-head {
  background: var(--accent-surface);
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.package-row:not(.package-head) div { font-weight: 700; }

.package-row strong {
  color: var(--accent-strong);
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: right;
}

.package-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 400;
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.benefit-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 100%;
  border: 1px solid var(--accent-line-soft);
  border-top: 3px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.benefit-card:nth-child(1) { --benefit-accent: var(--primary-blue); border-top-color: var(--primary-blue); }
.benefit-card:nth-child(2) { --benefit-accent: var(--primary-blue); border-top-color: var(--primary-blue); }
.benefit-card:nth-child(3) { --benefit-accent: var(--primary-blue); border-top-color: var(--primary-blue); }

.benefit-card:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.benefit-card-top {
  display: grid;
  gap: 8px;
}

.benefit-card h3,
.fellowship-panel h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.12rem;
  line-height: 1.24;
}

.benefit-card-top span {
  color: var(--benefit-accent, var(--text-accent));
  font-size: 0.86rem;
  font-weight: 700;
}

.benefit-card ul,
.field-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.benefit-card li,
.field-list li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.52;
}

.benefit-card li::before,
.field-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.sponsorship-contact {
  margin-top: 18px;
  border: 1px solid var(--accent-line);
  border-left: 3px solid var(--accent);
  background: var(--accent-surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--ink);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Fellowship
───────────────────────────────────────────────────────────────────────────── */
.fellowship-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 14px;
  align-items: stretch;
}

.fellowship-panel {
  border: 1px solid var(--accent-line-soft);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.5vw, 24px);
  box-shadow: var(--shadow-soft);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.fellowship-panel:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.fellowship-panel p {
  margin: 0;
  color: var(--ink-soft);
}

.fellowship-panel > p:first-child {
  color: var(--ink);
  font-size: 1.06rem;
  line-height: 1.64;
}

.fellowship-panel h3 {
  margin-top: 18px;
  margin-bottom: 10px;
}

.accent-panel {
  border-color: rgba(10,78,155,0.30);
  background: #003366;
  color: #FFFFFF;
}

.accent-panel .eyebrow { color: #FFFFFF; }
.accent-panel h3 { color: #FFFFFF; }
.accent-panel p { color: rgba(255,255,255,0.80); }

/* ─────────────────────────────────────────────────────────────────────────────
   Important Dates — Vertical Timeline
───────────────────────────────────────────────────────────────────────────── */
.date-grid {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: var(--container);
  margin: 0 auto;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}

/* Vertical connecting line */
.date-grid::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: rgba(10,78,155,0.32);
  border-radius: 2px;
}

.date-card {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0 14px;
  align-items: start;
  padding: 0;
  border-bottom: 1px solid var(--line);
  min-height: auto;
  border: none;
  background: none;
  box-shadow: none;
  border-radius: 0;
}

.date-card:last-child { padding-bottom: 0; border-bottom: 0; }

/* Timeline dot */
.date-card::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 22px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--primary-blue);
  z-index: 1;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.date-card:hover::before {
  transform: none;
}

/* Date card content wrapper */
.date-card-inner {
  grid-column: 2;
  border: 0;
  background: var(--surface);
  border-radius: 0;
  padding: 18px 20px 18px 0;
  box-shadow: none;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.date-card:hover .date-card-inner {
  transform: none;
  box-shadow: none;
}

.date-card p {
  margin: 0;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.date-card strong {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 1.28rem;
  line-height: 1.18;
  color: var(--ink);
}

.date-card span {
  display: block;
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.90rem;
  line-height: 1.5;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Technical Tracks
───────────────────────────────────────────────────────────────────────────── */
.track-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.34fr) minmax(0, 0.66fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.track-intro {
  position: sticky;
  top: 104px;
  margin-bottom: 0;
  max-width: 360px;
}

.track-intro p:last-child {
  margin-top: 12px;
  font-size: 1rem;
  line-height: 1.65;
}

.track-grid {
  display: grid;
  gap: 10px;
}

/* Per-track accent colours */
.track-card:nth-child(1) { --track-accent: var(--primary-blue); }
.track-card:nth-child(2) { --track-accent: var(--primary-blue); }
.track-card:nth-child(3) { --track-accent: var(--primary-blue); }
.track-card:nth-child(4) { --track-accent: var(--primary-blue); }
.track-card:nth-child(5) { --track-accent: var(--primary-blue); }

.track-card {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  border: 1px solid var(--accent-line-soft);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 15px 18px;
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
}

.track-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: var(--radius);
  background: var(--track-accent);
}

.track-card:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.track-number {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent-line-soft);
  border-radius: 50%;
  background: #FFFFFF;
  font-family: var(--font-body);
  font-size: 0.80rem;
  font-weight: 700;
  color: var(--track-accent);
  line-height: 1;
  letter-spacing: 0.02em;
}

.track-content {
  min-width: 0;
}

.track-card h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  line-height: 1.28;
  color: var(--ink);
}

.track-card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 5px 20px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.48;
}

.track-card li {
  position: relative;
  padding-left: 16px;
}

.track-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--track-accent);
  opacity: 0.68;
}

.track-card li + li { margin-top: 0; }

/* ─────────────────────────────────────────────────────────────────────────────
   Authors / Submission Guidelines
───────────────────────────────────────────────────────────────────────────── */
.authors-section {
  --authors-blue: var(--primary-blue);
  --authors-blue-dark: var(--dark-blue);
  --authors-blue-soft: var(--light-blue);
  --authors-ink: var(--text);
  --authors-muted: rgba(34,34,34,0.78);
  --authors-line: var(--border);

  color: var(--authors-ink);
  background: #FFFFFF;
  border-top: 1px solid var(--accent-line-soft);
  border-bottom: 1px solid var(--accent-line-soft);
  box-shadow: none;
}

[data-theme="dark"] .authors-section {
  --authors-blue-soft: #F5F5F5;
  --authors-ink: var(--ink);
  --authors-muted: var(--ink-soft);
  --authors-line: var(--line);

  background: #FFFFFF;
}

.authors-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  align-items: start;
}

.authors-copy {
  max-width: 790px;
}

.authors-copy .eyebrow {
  color: var(--authors-blue);
  letter-spacing: 0.06em;
}

.authors-copy h2 {
  margin: 0;
  color: var(--authors-ink);
  font-family: var(--font-heading);
  font-size: 2rem;
  line-height: 1.18;
  letter-spacing: 0;
  text-transform: uppercase;
}

.authors-copy > p {
  max-width: 760px;
  margin: 12px 0 0;
  color: var(--authors-muted);
  font-size: 1rem;
  line-height: 1.65;
}

.authors-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.authors-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  padding: 11px 18px;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.2;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.authors-button:hover {
  transform: none;
}

.authors-button-primary {
  border: 1px solid rgba(10,78,155,0.50);
  background: var(--navy);
  color: #FFFFFF;
}

.authors-button-primary:hover {
  background: #003366;
  border-color: rgba(10,78,155,0.72);
}

.authors-button-secondary {
  border: 1px solid var(--accent-line);
  background: #FFFFFF;
  color: var(--authors-blue-dark);
}

[data-theme="dark"] .authors-button-secondary {
  background: #FFFFFF;
  color: #222222;
}

.authors-button-secondary:hover {
  border-color: var(--authors-blue);
  background: var(--authors-blue-soft);
}

[data-theme="dark"] .authors-button-secondary:hover {
  color: #222222;
}

.authors-essentials {
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: #F5F5F5;
  overflow: hidden;
}

[data-theme="dark"] .authors-essentials {
  background: #F5F5F5;
}

.authors-essentials h3 {
  margin: 0;
  border-bottom: 1px solid var(--accent-line-soft);
  padding: 14px 16px;
  color: var(--authors-ink);
  font-family: var(--font-heading);
  font-size: 1.02rem;
  letter-spacing: 0;
}

.authors-essentials dl {
  display: grid;
  margin: 0;
}

.authors-essentials div {
  display: grid;
  gap: 4px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--authors-line);
  transition: background 160ms ease;
}

.authors-essentials div:hover {
  background: var(--authors-blue-soft);
}

.authors-essentials div:last-child {
  border-bottom: 0;
}

.authors-essentials dt {
  color: var(--authors-blue-dark);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

[data-theme="dark"] .authors-essentials dt {
  color: #222222;
}

.authors-essentials dd {
  margin: 0;
  color: var(--authors-ink);
  font-size: 0.96rem;
  font-weight: 400;
  line-height: 1.4;
}

.authors-jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 24px;
  padding: 12px 0;
  border-top: 1px solid var(--accent-line-soft);
  border-bottom: 1px solid var(--accent-line-soft);
}

.authors-jump-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius);
  background: #FFFFFF;
  color: var(--authors-blue-dark);
  padding: 7px 10px;
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.2;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

[data-theme="dark"] .authors-jump-nav a {
  background: #FFFFFF;
  color: #222222;
}

.authors-jump-nav a:hover {
  border-color: var(--authors-blue);
  background: var(--authors-blue-soft);
  color: var(--authors-blue-dark);
  transform: none;
}

[data-theme="dark"] .authors-jump-nav a:hover {
  color: #222222;
}

.authors-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.authors-card {
  scroll-margin-top: 112px;
  border: 1px solid var(--accent-line-soft);
  border-top: 3px solid var(--accent-line);
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  padding: 18px;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.authors-card:nth-child(3n + 2) { border-top-color: rgba(10,78,155,0.36); }
.authors-card:nth-child(3n) { border-top-color: var(--accent-line); }

.authors-card:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

[data-theme="dark"] .authors-card {
  background: #FFFFFF;
}

.authors-card-wide {
  grid-column: 1 / -1;
}

.authors-card-label {
  display: inline-flex;
  margin-bottom: 7px;
  color: var(--authors-blue);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

.authors-card h3 {
  margin: 0;
  color: var(--authors-ink);
  font-family: var(--font-heading);
  font-size: 1.2rem;
  line-height: 1.28;
  letter-spacing: 0;
}

.authors-card p {
  margin: 8px 0 0;
  color: var(--authors-muted);
  font-size: 0.96rem;
  line-height: 1.68;
}

.authors-check-list,
.authors-step-list {
  display: grid;
  gap: 7px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.authors-check-list li,
.authors-step-list li {
  position: relative;
  color: var(--authors-muted);
  font-size: 0.94rem;
  line-height: 1.58;
}

.authors-check-list li {
  padding-left: 18px;
}

.authors-check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--authors-blue);
}

.authors-step-list {
  counter-reset: author-step;
}

.authors-step-list li {
  min-height: 32px;
  padding-left: 44px;
  counter-increment: author-step;
}

.authors-step-list li::before {
  content: counter(author-step);
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--accent-line-soft);
  background: var(--authors-blue-soft);
  color: var(--authors-blue-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

[data-theme="dark"] .authors-step-list li::before {
  color: #222222;
}

.authors-spec-table {
  display: grid;
  margin-top: 14px;
  overflow: hidden;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
}

.authors-spec-row {
  display: grid;
  grid-template-columns: minmax(190px, 0.34fr) minmax(0, 0.66fr);
  border-bottom: 1px solid var(--authors-line);
}

.authors-spec-row:last-child {
  border-bottom: 0;
}

.authors-spec-row > div,
.authors-spec-row > strong {
  padding: 11px 14px;
  line-height: 1.45;
}

.authors-spec-row > div {
  background: var(--authors-blue-soft);
  color: var(--authors-blue-dark);
  font-size: 0.84rem;
  font-weight: 700;
}

[data-theme="dark"] .authors-spec-row > div {
  color: #222222;
}

.authors-spec-row > strong {
  color: var(--authors-ink);
  font-size: 0.94rem;
  font-weight: 700;
}

.authors-cmt-note {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  border: 1px solid var(--accent-line-soft);
  border-left: 4px solid var(--primary-blue);
  border-radius: var(--radius-lg);
  background: var(--accent-surface);
  padding: 14px 16px;
}

[data-theme="dark"] .authors-cmt-note {
  background: #F5F5F5;
}

.authors-cmt-note span {
  color: var(--authors-blue-dark);
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 700;
}

[data-theme="dark"] .authors-cmt-note span {
  color: #222222;
}

.authors-cmt-note p {
  margin: 0;
  color: var(--authors-muted);
  font-size: 0.94rem;
  line-height: 1.6;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Committees
───────────────────────────────────────────────────────────────────────────── */
.committee-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.committee-card {
  position: relative;
  border: 1px solid var(--accent-line-soft);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.committee-card::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 3px;
  border-radius: 0;
  background: var(--accent);
  opacity: 0.72;
}

.committee-card:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.committee-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  padding-top: 4px;
}

/* Role badge chip */
.role-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-strong);
  background: var(--accent-surface);
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius);
  padding: 3px 9px;
  margin-bottom: 14px;
}

[data-theme="dark"] .role-badge {
  background: #F5F5F5;
}

.committee-members {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.committee-member {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 56px;
}

.member-photo {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  overflow: hidden;
  border: 2px solid var(--accent-line-soft);
  background: #FFFFFF;
  border-radius: 50%;
  color: var(--accent-strong);
  font-weight: 700;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.committee-member:hover .member-photo {
  border-color: var(--accent);
}

.member-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.member-initials { font-size: 0.88rem; color: var(--accent-strong); }

/* Member details */
.member-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-width: 0;
}

.committee-member .member-name {
  color: var(--ink);
  font-weight: 700;
  font-size: 0.92rem;
  line-height: 1.25;
}

.member-institute {
  color: var(--ink-soft);
  font-size: 0.74rem;
  font-weight: 700;
  line-height: 1.35;
}

.member-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-strong);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.25;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.member-link:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Registration
───────────────────────────────────────────────────────────────────────────── */
.registration-heading {
  display: block;
  max-width: var(--container);
  margin-bottom: 22px;
}

.registration-heading h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.registration-heading p:last-child {
  max-width: 520px;
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.pricing-card {
  overflow: hidden;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  transition: opacity 160ms ease, transform 180ms ease, border-color 180ms ease;
}

[data-theme="dark"] .pricing-card {
  border-color: var(--accent-line-soft);
  background: #FFFFFF;
}

.pricing-card.is-switching {
  opacity: 0.72;
  transform: translateY(2px);
}

.pricing-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(18px, 2.5vw, 24px);
  border-bottom: 1px solid var(--accent-line-soft);
  background: #F5F5F5;
}

[data-theme="dark"] .pricing-card-top {
  border-bottom-color: var(--accent-line-soft);
  background: #F5F5F5;
}

.pricing-kicker {
  margin: 0 0 7px;
  color: var(--text-accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pricing-card-top h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 1.45rem;
  line-height: 1.16;
}

.currency-toggle {
  position: relative;
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(102px, 1fr));
  gap: 4px;
  flex-shrink: 0;
  padding: 5px;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: #F5F5F5;
  box-shadow: none;
}

.currency-toggle::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: 5px;
  top: 5px;
  width: calc((100% - 14px) / 2);
  height: calc(100% - 10px);
  border-radius: var(--radius);
  background: var(--navy);
  transform: translateX(0);
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 180ms ease, background 180ms ease;
}

.pricing-card[data-currency="usd"] .currency-toggle::before {
  transform: translateX(calc(100% + 4px));
}

[data-theme="dark"] .currency-toggle {
  border-color: var(--accent-line-soft);
  background: #F5F5F5;
}

.currency-toggle button {
  position: relative;
  z-index: 1;
  min-height: 42px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  transition: background 180ms ease, color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.currency-toggle button:hover {
  color: var(--accent-strong);
  background: transparent;
}

.currency-toggle button[aria-pressed="true"] {
  color: #FFFFFF;
  background: transparent;
  box-shadow: none;
}

.currency-toggle button[aria-pressed="true"]:hover {
  color: #FFFFFF;
  transform: none;
}

.pricing-table {
  display: grid;
  gap: 16px;
  padding: clamp(18px, 2.5vw, 24px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.pricing-card.is-switching .pricing-table {
  opacity: 0.55;
  transform: translateY(4px);
}

.pricing-group {
  display: grid;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

[data-theme="dark"] .pricing-group {
  border-color: var(--accent-line-soft);
  background: #FFFFFF;
}

.pricing-group-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--accent-line-soft);
  background: #F5F5F5;
}

[data-theme="dark"] .pricing-group-heading {
  border-bottom-color: var(--line);
  background: #F5F5F5;
}

.pricing-group-heading > span {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--accent-line);
  border-radius: 50%;
  color: var(--accent-strong);
  background: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 700;
}

[data-theme="dark"] .pricing-group-heading > span {
  border-color: var(--line-strong);
  color: var(--muted-accent);
}

.pricing-group-heading h4 {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  line-height: 1.2;
}

.pricing-group-heading p {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.pricing-row {
  display: grid;
  grid-template-columns: minmax(220px, 1.6fr) minmax(120px, 0.7fr) minmax(120px, 0.7fr);
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid var(--line);
  transition: background 160ms ease;
}

[data-theme="dark"] .pricing-row {
  border-bottom-color: var(--line);
}

.pricing-row:last-child { border-bottom: 0; }

.pricing-row:not(.pricing-row-head):hover {
  background: var(--accent-surface);
}

.pricing-row > div {
  min-width: 0;
  padding: 13px 16px;
}

.pricing-row > div + div {
  border-left: 1px solid var(--line);
}

[data-theme="dark"] .pricing-row > div + div {
  border-left-color: var(--line);
}

.pricing-row-head {
  min-height: 42px;
  background: var(--navy);
  color: rgba(255,255,255,0.86);
  box-shadow: none;
}

.pricing-row-head > div {
  padding-top: 10px;
  padding-bottom: 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pricing-membership {
  color: var(--ink);
  font-size: 0.96rem;
  font-weight: 700;
  line-height: 1.35;
}

.pricing-price {
  display: grid;
  gap: 3px;
}

.pricing-price span {
  display: none;
  color: var(--ink-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pricing-price strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.1;
}

.pricing-row:not(.pricing-row-head):hover .pricing-price strong {
  color: var(--accent-strong);
}

/* Registration guidelines */
.registration-guidelines {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.registration-guidelines article {
  border: 1px solid var(--accent-line-soft);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  border-top: 4px solid transparent;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.registration-guidelines article:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.registration-guidelines article:nth-child(1) { border-top-color: var(--primary-blue); }
.registration-guidelines article:nth-child(2) { border-top-color: var(--primary-blue); }
.registration-guidelines article:nth-child(3) { border-top-color: var(--primary-blue); }

.no-show-policy { grid-column: span 1; }

.registration-guidelines h3 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.registration-guidelines ol {
  margin: 0;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
}

.registration-guidelines li + li { margin-top: 6px; }

.registration-guidelines p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Venue
───────────────────────────────────────────────────────────────────────────── */
.venue-section {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1.22fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
  max-width: none;
  overflow: hidden;
}

.venue-section > * { max-width: none; }

.venue-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  display: block;
  height: 1px;
  background: rgba(10,78,155,0.16);
}

.venue-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  isolation: isolate;
}

.venue-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  border: 1px solid rgba(10,78,155,0.28);
  border-radius: inherit;
  pointer-events: none;
}

.venue-media::after {
  content: "Dhirubhai Ambani University";
  position: absolute;
  left: 18px;
  bottom: 18px;
  z-index: 2;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: #FFFFFF;
  color: var(--ink);
  padding: 8px 13px;
  font-size: 0.78rem;
  font-weight: 700;
}

.venue-media img {
  width: 100%;
  aspect-ratio: 16 / 9.2;
  object-fit: cover;
  transform: none;
  transition: transform 700ms ease, filter 700ms ease;
}

.venue-media:hover img {
  transform: none;
}

.venue-copy {
  position: relative;
  max-width: 520px;
  margin-left: clamp(0px, 4vw, 36px);
  padding-left: 26px;
}

.venue-copy::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 4px;
  width: 4px;
  border-radius: var(--radius);
  background: var(--accent);
}

.venue-copy p:last-child {
  max-width: 52ch;
  margin-top: 10px;
  font-size: 1rem;
  line-height: 1.65;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Contact
───────────────────────────────────────────────────────────────────────────── */
.contact-section {
  position: relative;
  overflow: hidden;
}

.contact-section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  display: block;
  height: 1px;
  background: rgba(10,78,155,0.16);
}

.contact-section .section-heading {
  max-width: var(--container);
  margin-bottom: 24px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  align-items: stretch;
}

.contact-card {
  position: relative;
  min-height: 124px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--accent-line-soft);
  border-top: 3px solid var(--line);
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 190ms ease, box-shadow 190ms ease, border-color 190ms ease;
}

.contact-card:hover {
  transform: none;
  border-color: var(--accent-line);
  box-shadow: var(--accent-glow);
}

.contact-card:nth-child(1) { border-top-color: var(--primary-blue); }
.contact-card:nth-child(2) { border-top-color: var(--primary-blue); }
.contact-card:nth-child(3) { border-top-color: var(--primary-blue); }
.contact-card:nth-child(4) { border-top-color: var(--primary-blue); }
.contact-card:nth-child(5) { border-top-color: var(--primary-blue); }

.contact-card-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.contact-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border: 1px solid var(--accent-line-soft);
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  color: var(--accent-strong);
  font-size: 1.1rem;
}

[data-theme="dark"] .contact-card-icon {
  background: #FFFFFF;
}

.contact-card-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-card span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.3;
}

.contact-card-value {
  min-width: 0;
}

.contact-card strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-body);
  font-weight: 600;
  line-height: 1.4;
  font-size: 1rem;
  overflow-wrap: anywhere;
}

.contact-card a {
  color: var(--accent-strong);
  transition: color 150ms ease, text-decoration-color 150ms ease;
  text-decoration: underline;
  text-decoration-color: rgba(15,23,42,0.22);
  text-underline-offset: 3px;
}

.contact-card a:hover { color: var(--accent); text-decoration-color: currentColor; }

[data-theme="dark"] .contact-card {
  background: #FFFFFF;
}

[data-theme="dark"] .venue-media {
}

/* ─────────────────────────────────────────────────────────────────────────────
   Footer
───────────────────────────────────────────────────────────────────────────── */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  width: min(calc(100% - clamp(24px, 5vw, 64px)), var(--container-wide));
  margin: 0 auto;
  padding: 24px clamp(22px, 4vw, 48px);
  background: var(--ink-strong);
  color: rgba(255,255,255,0.72);
  border-top: 1px solid rgba(10,78,155,0.24);
  box-shadow: none;
}

[data-theme="dark"] .site-footer {
  background: var(--ink-strong);
}

.site-footer p { margin: 0; font-size: 0.88rem; }

.site-footer a {
  color: rgba(255,255,255,0.9);
  font-weight: 700;
  font-size: 0.88rem;
  transition: color 150ms ease;
}

.site-footer a:hover { color: #DDEEFF; }

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Floating Back-to-Top FAB
───────────────────────────────────────────────────────────────────────────── */
.fab-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 30;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--navy);
  color: #FFFFFF;
  cursor: pointer;
  border: 1px solid rgba(10,78,155,0.32);
  opacity: 0;
  transform: translateY(16px) scale(0.85);
  transition: opacity 240ms ease, transform 240ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
  pointer-events: none;
  font-size: 1.1rem;
}

.fab-top.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.fab-top:hover {
  background: #003366;
  border-color: rgba(10,78,155,0.46);
  transform: translateY(-2px) scale(1.04);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Reveal Animations (staggered)
───────────────────────────────────────────────────────────────────────────── */
.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

.reveal.is-visible { opacity: 1; transform: none; }

/* Stagger children inside reveal containers */
.date-grid .date-card,
.track-grid .track-card,
.committee-layout .committee-card,
.contact-grid .contact-card {
  opacity: 1;
  transform: none;
  transition: none;
}

.date-grid.is-visible .date-card,
.track-grid.is-visible .track-card,
.committee-layout.is-visible .committee-card,
.contact-grid.is-visible .contact-card {
  opacity: 1;
  transform: none;
}

/* nth-child delay stagger */
.date-grid.is-visible .date-card:nth-child(1)  { transition-delay: 0.05s; }
.date-grid.is-visible .date-card:nth-child(2)  { transition-delay: 0.12s; }
.date-grid.is-visible .date-card:nth-child(3)  { transition-delay: 0.19s; }
.date-grid.is-visible .date-card:nth-child(4)  { transition-delay: 0.26s; }
.date-grid.is-visible .date-card:nth-child(5)  { transition-delay: 0.33s; }

.track-grid.is-visible .track-card:nth-child(1) { transition-delay: 0.05s; }
.track-grid.is-visible .track-card:nth-child(2) { transition-delay: 0.12s; }
.track-grid.is-visible .track-card:nth-child(3) { transition-delay: 0.19s; }
.track-grid.is-visible .track-card:nth-child(4) { transition-delay: 0.26s; }
.track-grid.is-visible .track-card:nth-child(5) { transition-delay: 0.33s; }

.committee-layout.is-visible .committee-card:nth-child(1)  { transition-delay: 0.04s; }
.committee-layout.is-visible .committee-card:nth-child(2)  { transition-delay: 0.08s; }
.committee-layout.is-visible .committee-card:nth-child(3)  { transition-delay: 0.12s; }
.committee-layout.is-visible .committee-card:nth-child(4)  { transition-delay: 0.16s; }
.committee-layout.is-visible .committee-card:nth-child(5)  { transition-delay: 0.20s; }
.committee-layout.is-visible .committee-card:nth-child(6)  { transition-delay: 0.24s; }
.committee-layout.is-visible .committee-card:nth-child(7)  { transition-delay: 0.28s; }
.committee-layout.is-visible .committee-card:nth-child(8)  { transition-delay: 0.32s; }
.committee-layout.is-visible .committee-card:nth-child(9)  { transition-delay: 0.36s; }
.committee-layout.is-visible .committee-card:nth-child(10) { transition-delay: 0.40s; }
.committee-layout.is-visible .committee-card:nth-child(11) { transition-delay: 0.44s; }
.committee-layout.is-visible .committee-card:nth-child(12) { transition-delay: 0.48s; }

.contact-grid.is-visible .contact-card:nth-child(1) { transition-delay: 0.05s; }
.contact-grid.is-visible .contact-card:nth-child(2) { transition-delay: 0.12s; }
.contact-grid.is-visible .contact-card:nth-child(3) { transition-delay: 0.19s; }
.contact-grid.is-visible .contact-card:nth-child(4) { transition-delay: 0.26s; }
.contact-grid.is-visible .contact-card:nth-child(5) { transition-delay: 0.33s; }

/* ─────────────────────────────────────────────────────────────────────────────
   Accessibility — reduce motion
───────────────────────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }

  .reveal,
  .date-grid .date-card,
  .track-grid .track-card,
  .committee-layout .committee-card,
  .contact-grid .contact-card {
    opacity: 1;
    transform: none;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive — 1080px
───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 1080px) {
  .site-nav {
    font-size: 0.8rem;
  }

  .site-nav a {
    padding-left: 9px;
    padding-right: 9px;
  }

  .committee-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .track-card ul {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-card,
  .contact-card:nth-child(4),
  .contact-card:nth-child(5) {
    grid-column: auto;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive — 1180px (mobile menu breakpoint)
───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .nav-row {
    padding: 6px 16px;
  }

  .menu-button {
    display: grid;
  }

  .site-nav {
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 220ms ease, opacity 160ms ease;
    opacity: 0;
  }

  .nav-menu {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-top: 6px;
  }

  .site-nav.is-open {
    max-height: 760px;
    opacity: 1;
  }

  .site-nav a {
    min-height: 38px;
    padding: 10px 12px;
    border-top: 1px solid rgba(255,255,255,0.24);
    white-space: normal;
  }

  .submenu,
  .submenu .submenu {
    position: static;
    display: block;
    min-width: 0;
    border: 0;
    box-shadow: none;
    background: rgba(0,0,0,0.12);
  }

  .submenu a {
    min-height: 34px;
    padding-left: 24px;
    color: #FFFFFF;
    border-bottom: 0;
    background: transparent;
  }

  .submenu .submenu a {
    padding-left: 36px;
  }

  .has-submenu > a::after {
    margin-left: auto;
  }

  .nav-cta {
    background: var(--navy);
    color: #FFFFFF;
  }

  .hero {
    padding-top: 126px;
  }

  .hero-details {
    grid-template-columns: 1fr;
  }

  .hero-details div {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .hero-details div:last-child {
    border-bottom: 0;
  }

  .section-heading.wide,
  .track-layout,
  .authors-shell,
  .authors-grid,
  .intro-grid,
  .sponsorship-intro,
  .fellowship-grid,
  .venue-section,
  .registration-guidelines {
    grid-template-columns: 1fr;
  }

  .benefit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .track-intro {
    position: static;
    max-width: 620px;
  }

  .authors-copy {
    max-width: 720px;
  }

  .authors-essentials {
    max-width: 720px;
  }

  .authors-card-wide {
    grid-column: auto;
  }

  .venue-copy {
    max-width: 680px;
    margin-left: 0;
  }

  .venue-media {
    order: -1;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive — 768px
───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .date-grid::before { left: 20px; }
  .date-card::before { left: 12px; }
  .date-card { grid-template-columns: 52px 1fr; }

  .authors-jump-nav {
    flex-wrap: nowrap;
    margin-right: -18px;
    overflow-x: auto;
    padding-right: 18px;
  }

  .authors-jump-nav a {
    white-space: nowrap;
  }

  .authors-spec-row {
    grid-template-columns: 1fr;
  }

  .pricing-card-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .currency-toggle {
    width: 100%;
  }

  .pricing-row-head {
    display: none;
  }

  .pricing-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    min-height: 0;
    padding: 14px 16px;
  }

  .pricing-row > div {
    padding: 8px 0;
  }

  .pricing-row > div + div {
    border-left: 0;
  }

  .pricing-membership {
    grid-column: 1 / -1;
    padding-bottom: 12px;
  }

  .pricing-price span {
    display: block;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive — 640px
───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .brand {
    align-items: flex-start;
    width: calc(100% - 24px);
    gap: 12px;
    padding: 8px 0;
  }

  .brand-logos {
    flex-wrap: wrap;
    gap: 6px;
    max-width: 124px;
  }

  .brand-logo,
  .conference-mark {
    width: 58px;
    height: 38px;
    padding: 4px 5px;
  }

  .conference-mark {
    font-size: 0.68rem;
  }

  .brand strong {
    font-size: 0.98rem;
  }

  .brand small {
    font-size: 0.78rem;
  }

  .header-actions {
    gap: 8px;
  }

  .menu-button {
    width: 38px;
    height: 34px;
  }

  .site-nav { grid-template-columns: 1fr; }

  .nav-menu {
    grid-template-columns: 1fr;
  }

  .hero { width: calc(100% - 24px); padding: 104px 14px 30px; }
  .hero-logo-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .hero-logo-row img,
  .hero-logo-seal {
    height: 58px;
    padding: 5px;
  }
  .hero-logo-seal { font-size: 0.8rem; }
  .hero h1 { max-width: 100%; font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }

  .section {
    width: calc(100% - 24px);
    padding: 34px 16px;
  }

  .section-heading {
    margin-bottom: 20px;
  }

  .venue-section {
    gap: 26px;
  }

  .venue-copy {
    padding-left: 18px;
  }

  .venue-media {
    border-radius: var(--radius-lg);
  }

  .venue-media::after {
    left: 12px;
    bottom: 12px;
    max-width: calc(100% - 24px);
    font-size: 0.70rem;
  }

  .track-grid,
  .committee-layout,
  .benefit-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .package-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .package-row strong {
    text-align: left;
  }

  .contact-section .section-heading { margin-bottom: 20px; }

  .contact-card {
    min-height: 132px;
    padding: 18px;
  }

  .track-layout {
    gap: 24px;
  }

  .authors-copy h2 {
    font-size: 2.25rem;
  }

  .authors-copy > p {
    font-size: 1rem;
  }

  .authors-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .authors-button {
    width: 100%;
  }

  .authors-card,
  .authors-essentials,
  .authors-cmt-note {
    border-radius: var(--radius-lg);
  }

  .authors-card {
    padding: 20px;
  }

  .track-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 18px;
  }

  .track-card::before {
    top: 0;
    bottom: auto;
    width: auto;
    height: 3px;
    right: 0;
    border-radius: var(--radius) var(--radius) 0 0;
  }

  .date-grid { max-width: 100%; }
  .date-grid::before { display: none; }
  .date-card { grid-template-columns: 1fr; padding: 0; }
  .date-card::before { display: none; }
  .date-card-inner { grid-column: 1; padding: 16px; }

  .logo-strip { width: calc(100% - 24px); }
  .logo-card { width: 200px; }

  .committee-member {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .registration-heading {
    margin-bottom: 22px;
  }

  .pricing-card {
    border-radius: var(--radius-lg);
  }

  .pricing-card-top,
  .pricing-table {
    padding: 18px;
  }

  .currency-toggle {
    grid-template-columns: 1fr 1fr;
  }

  .currency-toggle button {
    min-height: 40px;
    font-size: 0.82rem;
  }

  .pricing-group {
    border-radius: var(--radius-lg);
  }

  .pricing-group-heading {
    align-items: flex-start;
    padding: 18px;
  }

  .pricing-group-heading > span {
    width: 36px;
    height: 36px;
  }

  .pricing-row {
    gap: 0 18px;
  }

  .member-photo { width: 46px; height: 46px; }

  .site-footer {
    display: block;
    width: calc(100% - 24px);
    padding: 20px 16px;
  }
  .site-footer a { display: inline-block; margin-top: 10px; }
  .footer-links { flex-direction: column; align-items: flex-start; gap: 10px; }

  .fab-top { bottom: 18px; right: 18px; width: 42px; height: 42px; }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Task 6 Homepage Content: Classic Boxed Sections
───────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  animation: none !important;
  transition: none !important;
  scroll-behavior: auto !important;
}

:root {
  --shadow: none;
  --shadow-soft: none;
  --accent-glow: none;
  --accent-glow-hover: none;
  --radius: 0;
  --radius-lg: 0;
  --radius-sm: 0;
}

html {
  scroll-behavior: auto;
}

body {
  background: #FFFFFF;
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 15px;
  line-height: 1.52;
}

.progress-bar,
.fab-top {
  display: none;
}

.site-header,
.nav-row,
.site-footer {
  box-shadow: none;
}

.brand {
  padding: 8px 0;
}

.brand strong {
  font-size: clamp(1rem, 1.6vw, 1.28rem);
}

.brand small,
.site-nav,
.button,
.authors-button,
.currency-toggle button,
.contact-card span,
.pricing-kicker,
.eyebrow {
  font-family: Arial, Verdana, sans-serif;
}

.hero,
.logo-strip,
.section,
.site-footer {
  width: min(calc(100% - 32px), var(--container-wide));
  margin-left: auto;
  margin-right: auto;
}

.hero {
  margin-top: 18px;
  margin-bottom: 0;
  padding: 24px clamp(18px, 3vw, 32px);
  border: 1px solid var(--border);
  border-top: 3px solid var(--dark-blue);
}

.hero::after,
.hero-banner,
.intro-section::before,
.section-heading::after,
.track-card::before,
.committee-card::before,
.venue-section::before,
.venue-copy::before,
.contact-section::before,
.venue-media::after {
  display: none;
}

.hero-logo-row {
  grid-template-columns: 130px 82px 130px;
  gap: 18px;
  margin-bottom: 16px;
}

.hero-logo-row img,
.hero-logo-seal,
.brand-logo,
.conference-mark {
  height: 58px;
  border: 1px solid var(--border);
  padding: 5px;
}

.hero-logo-seal {
  font-size: 0.9rem;
}

.hero-kicker,
.eyebrow,
.authors-card-label,
.pricing-kicker {
  margin-bottom: 6px;
  color: var(--dark-blue);
  font-size: 0.72rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 920px;
  font-size: clamp(1.65rem, 2.8vw, 2.35rem);
  line-height: 1.18;
}

.hero-conference-code {
  font-size: 1.05rem;
}

.hero-details {
  margin-top: 18px;
}

.hero-details div,
.date-card-inner,
.pricing-row > div,
.package-row,
.authors-spec-row > div,
.authors-spec-row > strong {
  padding: 10px 12px;
}

.hero-actions {
  margin-top: 16px;
}

.button,
.authors-button {
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--dark-blue);
  border-radius: 0;
  font-size: 0.84rem;
}

.button.secondary,
.authors-button-secondary {
  background: #FFFFFF;
  color: var(--dark-blue);
}

.logo-strip {
  border: 1px solid var(--border);
  border-top: 0;
}

.logo-card {
  min-height: 54px;
  padding: 8px 18px;
  box-shadow: none;
}

.logo-card:hover,
.quick-links a:hover,
.authors-essentials div:hover,
.authors-jump-nav a:hover,
.pricing-row:not(.pricing-row-head):hover {
  background: inherit;
  color: inherit;
}

.quick-links a:hover {
  padding-left: 12px;
}

.section {
  padding: 24px clamp(18px, 3vw, 32px);
  border: 1px solid var(--border);
  border-top: 0;
  background: #FFFFFF;
}

.muted {
  background: #FFFFFF;
}

.section-heading,
.registration-heading,
.contact-section .section-heading {
  max-width: var(--container);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.section-heading h2,
.venue-copy h2,
.registration-heading h2,
.authors-copy h2 {
  color: var(--dark-blue);
  font-size: clamp(1.25rem, 2vw, 1.65rem);
  line-height: 1.2;
  text-transform: none;
}

.section-heading.wide {
  display: block;
}

.section-heading.wide > p {
  margin-top: 8px;
}

.classic-box,
.lead-copy,
.quick-links,
.date-grid,
.track-card,
.authors-essentials,
.authors-card,
.authors-cmt-note,
.package-table,
.benefit-card,
.pricing-card,
.pricing-group,
.registration-guidelines article,
.committee-card,
.venue-media,
.contact-card {
  border: 1px solid var(--border);
  border-radius: 0;
  background: #FFFFFF;
  box-shadow: none;
}

.classic-box {
  padding: 14px 16px;
}

.classic-box p {
  margin: 0;
  color: var(--ink);
}

.classic-two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.classic-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.classic-list,
.download-list {
  margin: 0;
  padding-left: 20px;
}

.classic-list li + li,
.download-list li + li {
  margin-top: 6px;
}

.download-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  color: var(--dark-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.download-list span {
  color: var(--ink-soft);
  font-family: Arial, Verdana, sans-serif;
  font-size: 0.82rem;
  text-decoration: none;
}

.intro-grid,
.authors-shell,
.track-layout,
.venue-section {
  gap: 18px;
}

.lead-copy {
  padding: 14px 16px;
}

.lead-copy p:first-child {
  border-left: 0;
  padding-left: 0;
}

.quick-links {
  overflow: visible;
}

.quick-links a {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.quick-links a::after {
  content: "";
}

.date-grid::before,
.date-card::before {
  display: none;
}

.date-card {
  display: block;
  border-bottom: 1px solid var(--border);
}

.date-card strong {
  font-size: 1.08rem;
}

.track-intro {
  position: static;
  max-width: none;
}

.track-card {
  grid-template-columns: 40px minmax(0, 1fr);
  padding: 12px 14px;
}

.track-number,
.pricing-group-heading > span,
.member-photo,
.authors-step-list li::before,
.contact-card-icon,
.theme-toggle {
  border-radius: 0;
}

.track-card ul {
  gap: 3px 18px;
  font-size: 0.86rem;
}

.track-card li::before,
.benefit-card li::before,
.field-list li::before,
.authors-check-list li::before {
  width: 4px;
  height: 4px;
  border-radius: 0;
}

.authors-section {
  border-top: 0;
}

.authors-copy > p,
.lead-copy,
.classic-box,
.registration-guidelines ol,
.registration-guidelines p,
.benefit-card li,
.contact-card strong {
  font-size: 0.94rem;
}

.authors-actions,
.authors-jump-nav {
  margin-top: 14px;
}

.authors-jump-nav {
  padding: 8px 0;
}

.authors-jump-nav a {
  min-height: 30px;
  border-radius: 0;
  padding: 5px 8px;
}

.authors-grid,
.committee-layout,
.benefit-grid,
.registration-guidelines,
.contact-grid {
  gap: 10px;
}

.authors-card,
.committee-card,
.benefit-card,
.registration-guidelines article,
.contact-card {
  padding: 14px;
  border-top: 1px solid var(--border);
}

.authors-card:nth-child(3n + 2),
.authors-card:nth-child(3n),
.benefit-card:nth-child(1),
.benefit-card:nth-child(2),
.benefit-card:nth-child(3),
.registration-guidelines article:nth-child(1),
.registration-guidelines article:nth-child(2),
.registration-guidelines article:nth-child(3),
.contact-card:nth-child(1),
.contact-card:nth-child(2),
.contact-card:nth-child(3),
.contact-card:nth-child(4),
.contact-card:nth-child(5) {
  border-top-color: var(--border);
}

.pricing-card-top,
.pricing-group-heading,
.package-head,
.authors-essentials h3,
.authors-spec-row > div {
  background: #F5F5F5;
}

.currency-toggle::before {
  display: none;
}

.currency-toggle {
  padding: 0;
  gap: 0;
  border-radius: 0;
}

.currency-toggle button {
  border-left: 1px solid var(--border);
  border-radius: 0;
  background: #FFFFFF;
  color: var(--dark-blue);
}

.currency-toggle button:first-child {
  border-left: 0;
}

.currency-toggle button[aria-pressed="true"] {
  background: var(--dark-blue);
  color: #FFFFFF;
}

.pricing-card.is-switching,
.pricing-card.is-switching .pricing-table {
  opacity: 1;
  transform: none;
}

.venue-section {
  align-items: start;
}

.venue-copy {
  margin-left: 0;
  padding-left: 0;
}

.venue-media {
  overflow: hidden;
}

.venue-media::before {
  border-color: var(--border);
}

.venue-media img {
  aspect-ratio: 16 / 8;
}

.contact-card {
  min-height: 0;
}

.contact-card-top {
  gap: 10px;
}

.site-footer {
  padding: 16px clamp(18px, 3vw, 32px);
  border: 1px solid var(--border);
  border-top: 0;
  background: var(--dark-blue);
}

@media (max-width: 760px) {
  .classic-two-column,
  .download-list a {
    grid-template-columns: 1fr;
  }

  .hero,
  .logo-strip,
  .section,
  .site-footer {
    width: calc(100% - 20px);
  }

  .hero {
    padding: 18px 12px;
  }

  .hero-logo-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .section {
    padding: 20px 12px;
  }
}

/* ─────────────────────────────────────────────────────────────────────────────
   Task 7 Components: Traditional Bootstrap-like System
───────────────────────────────────────────────────────────────────────────── */
:root {
  --component-border: #CED4DA;
  --component-border-strong: #ADB5BD;
  --component-bg: #FFFFFF;
  --component-bg-muted: #F8F9FA;
  --component-bg-soft: #F1F3F5;
  --component-primary: #0A4E9B;
  --component-primary-dark: #003366;
  --component-info-bg: #DDEEFF;
  --component-info-border: #9EC5FE;
  --component-success-bg: #D1E7DD;
  --component-success-border: #A3CFBB;
  --component-warning-bg: #FFF3CD;
  --component-warning-border: #FFDA6A;
  --component-danger-bg: #F8D7DA;
  --component-danger-border: #F1AEB5;
  --radius: 4px;
  --radius-lg: 4px;
  --radius-sm: 3px;
}

.button,
.authors-button,
.currency-toggle button,
.menu-button,
.theme-toggle,
.fab-top,
button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  border-radius: var(--radius-sm);
  box-shadow: none;
  font-family: Arial, Verdana, sans-serif;
  font-weight: 600;
}

.button,
.authors-button,
input[type="button"],
input[type="submit"],
input[type="reset"] {
  min-height: 36px;
  border: 1px solid var(--component-primary);
  padding: 7px 13px;
  line-height: 1.25;
}

.button.primary,
.authors-button-primary,
input[type="submit"] {
  border-color: var(--component-primary-dark);
  background: var(--component-primary);
  color: #FFFFFF;
}

.button.primary:hover,
.authors-button-primary:hover,
input[type="submit"]:hover {
  border-color: var(--component-primary-dark);
  background: var(--component-primary-dark);
  color: #FFFFFF;
}

.button.secondary,
.authors-button-secondary,
input[type="button"],
input[type="reset"] {
  border-color: var(--component-border-strong);
  background: #FFFFFF;
  color: var(--component-primary-dark);
}

.button.secondary:hover,
.authors-button-secondary:hover,
input[type="button"]:hover,
input[type="reset"]:hover {
  border-color: var(--component-primary);
  background: var(--component-info-bg);
  color: var(--component-primary-dark);
}

.classic-box,
.news-panel,
.information-panel,
.quick-links,
.date-grid,
.date-card-inner,
.track-card,
.authors-essentials,
.authors-card,
.authors-cmt-note,
.package-table,
.benefit-card,
.pricing-card,
.pricing-group,
.registration-guidelines article,
.committee-card,
.venue-media,
.contact-card,
.fellowship-panel,
.sponsorship-intro p,
.sponsorship-contact,
.alert,
.accordion,
.accordion-item,
form {
  border: 1px solid var(--component-border);
  border-radius: var(--radius);
  background: var(--component-bg);
  box-shadow: none;
}

.classic-box,
.news-panel,
.information-panel,
.benefit-card,
.authors-card,
.committee-card,
.registration-guidelines article,
.contact-card,
.fellowship-panel,
form {
  padding: 16px;
}

.news-panel {
  border-left: 4px solid var(--component-primary);
  background: var(--component-bg);
}

.news-panel .classic-list li::marker {
  color: var(--component-primary);
}

.information-panel,
.authors-cmt-note,
.sponsorship-contact {
  border-left: 4px solid var(--component-info-border);
  background: var(--component-bg);
}

.alert {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-color: var(--component-info-border);
  border-left: 4px solid var(--component-primary);
  background: var(--component-info-bg);
  color: #052C65;
}

.alert-success {
  border-color: var(--component-success-border);
  border-left-color: #198754;
  background: var(--component-success-bg);
  color: #0A3622;
}

.alert-warning {
  border-color: var(--component-warning-border);
  border-left-color: #FFC107;
  background: var(--component-warning-bg);
  color: #664D03;
}

.alert-danger {
  border-color: var(--component-danger-border);
  border-left-color: #DC3545;
  background: var(--component-danger-bg);
  color: #58151C;
}

.date-grid,
.package-table,
.pricing-card,
.pricing-group,
.authors-spec-table,
.quick-links,
.accordion {
  overflow: hidden;
}

.date-card,
.package-row,
.pricing-row,
.authors-spec-row,
.quick-links a {
  border-color: var(--component-border);
}

.date-card:last-child,
.package-row:last-child,
.pricing-row:last-child,
.authors-spec-row:last-child,
.quick-links a:last-child {
  border-bottom: 0;
}

.date-card-inner {
  border: 0;
  border-radius: 0;
  padding: 13px 16px;
}

.date-card p,
.pricing-kicker,
.authors-card-label,
.contact-card span {
  color: #495057;
  font-family: Arial, Verdana, sans-serif;
  letter-spacing: 0;
}

.date-card strong,
.pricing-price strong,
.package-row strong {
  color: var(--component-primary-dark);
}

.track-card,
.benefit-card,
.authors-card,
.committee-card,
.registration-guidelines article,
.contact-card {
  border-top: 3px solid var(--component-primary);
}

.track-number,
.pricing-group-heading > span,
.authors-step-list li::before,
.contact-card-icon,
.member-photo {
  border-radius: var(--radius-sm);
  border-color: var(--component-border);
  background: var(--component-bg-muted);
}

.pricing-card-top,
.pricing-group-heading,
.package-head,
.authors-essentials h3,
.authors-spec-row > div,
.accordion-header,
.accordion-button,
thead,
.table-head {
  background: var(--component-bg-muted);
  color: #212529;
}

.pricing-table,
.pricing-group {
  gap: 12px;
}

.pricing-row-head,
.package-head {
  background: var(--component-bg-soft);
  color: #212529;
}

.pricing-row-head > div,
.package-head,
.authors-spec-row > div {
  font-family: Arial, Verdana, sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}

.pricing-row:not(.pricing-row-head):hover,
.package-row:not(.package-head):hover,
.authors-spec-row:hover,
.quick-links a:hover {
  background: var(--component-bg-muted);
  color: inherit;
}

.package-row,
.pricing-row,
.authors-spec-row {
  min-height: 0;
}

table,
.table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--component-border);
  background: var(--component-bg);
  color: var(--ink);
}

th,
td,
.table-cell {
  border: 1px solid var(--component-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--component-bg-muted);
  color: #212529;
  font-family: Arial, Verdana, sans-serif;
  font-weight: 700;
}

tbody tr:nth-child(even) {
  background: #FAFAFA;
}

tbody tr:hover {
  background: var(--component-bg-muted);
}

label,
legend,
.form-label {
  display: inline-block;
  margin-bottom: 6px;
  color: #212529;
  font-family: Arial, Verdana, sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
}

fieldset {
  min-width: 0;
  margin: 0 0 16px;
  padding: 14px 16px;
  border: 1px solid var(--component-border);
  border-radius: var(--radius);
}

input,
select,
textarea,
.form-control {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--component-border-strong);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  color: var(--ink);
  padding: 8px 10px;
  font: 400 0.95rem/1.4 Arial, Verdana, sans-serif;
  box-shadow: none;
}

textarea {
  min-height: 110px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
.form-control:focus {
  border-color: var(--component-primary);
  outline: 2px solid rgba(10, 78, 155, 0.18);
  outline-offset: 0;
}

input[disabled],
select[disabled],
textarea[disabled],
.form-control[disabled] {
  background: #E9ECEF;
  color: #6C757D;
}

.accordion {
  display: grid;
  gap: 0;
}

.accordion-item {
  border: 0;
  border-bottom: 1px solid var(--component-border);
  border-radius: 0;
}

.accordion-item:last-child {
  border-bottom: 0;
}

.accordion-header,
.accordion-button,
summary {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 42px;
  border: 0;
  background: var(--component-bg-muted);
  color: #212529;
  padding: 10px 14px;
  font-family: Arial, Verdana, sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.accordion-body,
details > :not(summary) {
  padding: 14px;
  border-top: 1px solid var(--component-border);
  background: #FFFFFF;
}

details {
  border: 1px solid var(--component-border);
  border-radius: var(--radius);
  background: #FFFFFF;
  overflow: hidden;
}

details + details {
  margin-top: 8px;
}

.hero-details,
.registration-guidelines,
.benefit-grid,
.committee-layout,
.contact-grid,
.authors-grid,
.track-grid {
  gap: 12px;
}

@media (max-width: 640px) {
  .classic-box,
  .news-panel,
  .information-panel,
  .benefit-card,
  .authors-card,
  .committee-card,
  .registration-guidelines article,
  .contact-card,
  .fellowship-panel,
  form {
    padding: 14px;
  }

  th,
  td,
  .table-cell,
  .package-row,
  .authors-spec-row > div,
  .authors-spec-row > strong {
    padding: 9px 10px;
  }
}