/* ═══════════════════════════════════════════════════════════════
   IConSECT 2027 — Main Stylesheet
   Shared across ALL pages. Link with:
   <link rel="stylesheet" href="css/style.css">
   (adjust path if page is in a subfolder)
═══════════════════════════════════════════════════════════════ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ── CSS VARIABLES (change here to restyle the whole site) ── */
:root {
  --navy:        #BFE3F5;
  --navy-mid:    #A8D4EC;
  --blue:        #1150CC;
  --blue-bright: #0B6CB5;
  --cyan:        #0568A6;
  --cyan-soft:   #0A4F80;
  --gold:        #F5A742;
  --gold-soft:   #FDD89B;
  --white:       #0D2137;
  --white-80:    rgba(10,40,70,0.85);
  --white-40:    rgba(10,40,70,0.45);
  --white-15:    rgba(10,40,70,0.15);
  --white-08:    rgba(10,40,70,0.10);
  --text-muted:  rgba(10,40,70,0.55);
  --grid-line:   rgba(5,104,166,0.10);
  --bg:          #D6EEFA;
  --font-display: 'Tahoma', 'Geneva', sans-serif;
  --font-body:    'Tahoma', 'Geneva', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ════════════════════════════════════════
   GRID BACKGROUND (fixed, decorative)
════════════════════════════════════════ */
.grid-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ════════════════════════════════════════
   NAVBAR
════════════════════════════════════════ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5vw;
  height: 68px;
  background: rgba(185,225,248,0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--white-08);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 800; letter-spacing: -0.5px;
  color: var(--white);
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
}

.nav-logo-badge {
  background: linear-gradient(135deg, var(--blue-bright), #1A8CC9);
  color: #fff;
  font-size: 11px; font-weight: 700;
  padding: 3px 7px; border-radius: 4px;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex; gap: 28px; list-style: none; align-items: center;
}

/* ════════════════════════════════════════
   PERFECT DROPDOWN MENU
════════════════════════════════════════ */

.nav-links > li {
  position: relative;
  padding-bottom: 10px; /* This creates a 'bridge' so the mouse is still over the LI */
  margin-bottom: -10px; /* Offsets the padding so layout doesn't shift */
}

/* Parent menu item */
.dropdown > a {
  display: flex;
  align-items: center;
  height: 68px;
  padding: 0 5px;
}

/* Dropdown menu */
.dropdown-menu {
  position: absolute;
  top: 100%; /* Starts right at the bottom of the LI */
  left: 0;
  display: none;

  min-width: 240px;

  background: rgba(185,225,248,0.98);
  backdrop-filter: blur(18px);

  border: 1px solid var(--white-15);
  border-radius: 10px;

  list-style: none;

  flex-direction: column;

  padding: 8px 0;

  z-index: 999;

  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.dropdown-menu::before {
  content: "";
  position: absolute;
  top: -10px; /* Reaches up to touch the nav link */
  left: 0;
  width: 100%;
  height: 10px;
  display: block;
}

/* Invisible hover bridge */
.dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 100%;
  height: 18px;
}

/* Show dropdown */
.dropdown:hover .dropdown-menu {
  display: flex;
}

/* Dropdown items */
.dropdown-menu li {
  width: 100%;
}

.dropdown-menu li a {
  display: block;
  width: 100%;

  padding: 12px 18px;

  color: var(--white-80);
  text-decoration: none;

  font-size: 13.5px;

  transition: all 0.5s ease;
  white-space: nowrap;
}

/* Hover effect */
.dropdown-menu li a:hover {
  background: rgba(5,104,166,0.08);
  color: var(--cyan);
}



/* "Submit Paper" CTA button in nav */
.nav-links a.nav-cta {
  background: var(--blue-bright);
  color: #fff !important;
  padding: 8px 20px; border-radius: 6px;
  font-weight: 500;
  transition: background 0.2s;
}
.nav-links a.nav-cta:hover { background: var(--cyan) !important; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  position: relative;
  width: 30px;
  height: 24px;
  cursor: pointer;
  margin-left: auto;
}

.nav-toggle-label span {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--white);
  border-radius: 2px;
  position: absolute;
  transition: all 0.3s;
}

.nav-toggle-label span:nth-child(1) { top: 0; }
.nav-toggle-label span:nth-child(2) { top: 10px; }
.nav-toggle-label span:nth-child(3) { top: 20px; }

#nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) {
  transform: rotate(45deg);
  top: 10px;
}

#nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) {
  opacity: 0;
}

#nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) {
  transform: rotate(-45deg);
  top: 10px;
}







/* ════════════════════════════════════════
   BUTTONS (reusable anywhere)
════════════════════════════════════════ */
.btn-primary {
  background: linear-gradient(135deg, var(--blue-bright), #084E80);
  color: #fff; text-decoration: none;
  padding: 14px 36px; border-radius: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  letter-spacing: 0.2px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 40px rgba(11,108,181,0.30);
  display: inline-block; cursor: pointer; border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 60px rgba(11,108,181,0.45); }

.btn-secondary {
  border: 1px solid var(--white-40);
  color: var(--white); text-decoration: none;
  padding: 14px 36px; border-radius: 8px;
  font-family: var(--font-display); font-weight: 500; font-size: 15px;
  transition: border-color 0.2s, background 0.2s;
  display: inline-block; cursor: pointer; background: transparent;
}
.btn-secondary:hover { border-color: var(--cyan); background: rgba(5,104,166,0.08); }

/* ════════════════════════════════════════
   HERO SECTION
════════════════════════════════════════ */
.hero {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 120px 5vw 80px;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute; z-index: -1;
  width: 800px; height: 800px;
  background: radial-gradient(ellipse, rgba(11,108,181,0.18) 0%, transparent 70%);
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(5,104,166,0.35);
  background: rgba(5,104,166,0.10);
  padding: 6px 16px; border-radius: 100px;
  font-size: 13px; color: var(--cyan-soft);
  letter-spacing: 0.8px; text-transform: uppercase; font-weight: 500;
  margin-bottom: 32px;
}

.hero-tag-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 80px);
  font-weight: 800; line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--blue-bright) 50%, var(--gold) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(15px, 2vw, 19px);
  color: var(--white-80);
  max-width: 620px; margin: 0 auto 48px;
  font-weight: 300; line-height: 1.6;
}

.hero-meta {
  display: flex; gap: 40px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 56px;
}

.hero-meta-item {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}

.hero-meta-label {
  font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text-muted);
}

.hero-meta-value {
  font-family: var(--font-display);
  font-size: 17px; font-weight: 700; color: var(--white);
}

.hero-btns {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}

/* ════════════════════════════════════════
   COUNTDOWN
════════════════════════════════════════ */
.countdown-section {
  position: relative; z-index: 1;
  padding: 60px 5vw;
  display: flex; justify-content: center;
}

.countdown-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 16px;
  padding: 40px 60px;
  display: flex; gap: 48px; align-items: center;
  backdrop-filter: blur(12px);
}

.countdown-label {
  font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 20px; text-align: center;
}

.countdown-digits { display: flex; gap: 24px; align-items: center; }

.countdown-unit {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}

.countdown-num {
  font-family: var(--font-display);
  font-size: 56px; font-weight: 800; line-height: 1;
  color: var(--white);
  min-width: 72px; text-align: center;
}

.countdown-unit-label {
  font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text-muted);
}

.countdown-divider {
  font-size: 48px; line-height: 1;
  color: var(--white-40); margin-top: -14px;
}

/* ════════════════════════════════════════
   SHARED SECTION STYLES
════════════════════════════════════════ */
section {
  position: relative; z-index: 1;
  padding: 100px 5vw;
}

/* Inner page hero / page header */
.page-header {
  position: relative; z-index: 1;
  padding: 140px 5vw 70px;
  text-align: center;
}

.section-tag {
  font-size: 12px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 16px; font-weight: 500;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 800; line-height: 1.1; letter-spacing: -1px;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--white-80); font-size: 17px;
  max-width: 560px; font-weight: 300; line-height: 1.7;
}

/* ════════════════════════════════════════
   ABOUT / STATS
════════════════════════════════════════ */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
  align-items: center; margin-top: 64px;
}

.about-stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}

.stat-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 12px; padding: 28px 24px;
  transition: border-color 0.2s, background 0.2s;
}

.stat-card:hover {
  border-color: rgba(5,104,166,0.4);
  background: rgba(5,104,166,0.05);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 42px; font-weight: 800; line-height: 1;
  background: linear-gradient(90deg, var(--blue-bright), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label { color: var(--text-muted); font-size: 14px; }

/* ════════════════════════════════════════
   TOPICS / CALL FOR PAPERS
════════════════════════════════════════ */
.topics-section {
  background: linear-gradient(180deg, transparent, rgba(11,108,181,0.06) 50%, transparent);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px; margin-top: 56px;
}

.topic-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 12px; padding: 24px 28px;
  display: flex; align-items: flex-start; gap: 16px;
  transition: transform 0.2s, border-color 0.2s;
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(5,104,166,0.35);
}

.topic-icon {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}

.topic-name {
  font-family: var(--font-display);
  font-size: 15px; font-weight: 600; margin-bottom: 6px; line-height: 1.3;
}

.topic-desc { font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* ════════════════════════════════════════
   IMPORTANT DATES / TIMELINE
════════════════════════════════════════ */
.dates-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px; margin-top: 56px;
}

.date-card {
  border-radius: 12px; padding: 24px;
  position: relative; overflow: hidden;
  border: 1px solid var(--white-15);
}

.date-card.upcoming {
  background: linear-gradient(135deg, rgba(11,108,181,0.12), rgba(5,104,166,0.04));
  border-color: rgba(11,108,181,0.35);
}

.date-card.passed {
  background: var(--white-08); opacity: 0.65;
}

.date-badge {
  display: inline-block;
  font-size: 11px; letter-spacing: 1px; text-transform: uppercase;
  padding: 3px 10px; border-radius: 4px; margin-bottom: 14px; font-weight: 600;
}

.date-badge.active { background: rgba(5,104,166,0.18); color: var(--cyan); }
.date-badge.closed { background: rgba(10,40,70,0.08);  color: var(--text-muted); }

.date-event {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700; margin-bottom: 8px; line-height: 1.3;
}

.date-value { font-size: 14px; color: var(--cyan-soft); font-weight: 500; }

/* ════════════════════════════════════════
   SPEAKERS
════════════════════════════════════════ */
.speakers-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px; margin-top: 56px;
}

.speaker-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 14px; padding: 28px 20px;
  text-align: center;
  transition: transform 0.2s, border-color 0.2s;
  cursor: pointer;
}

.speaker-card:hover {
  transform: translateY(-6px);
  border-color: rgba(245,167,66,0.45);
}

.speaker-avatar {
  width: 80px; height: 80px; border-radius: 50%;
  margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 26px; font-weight: 800;
  color: #fff;
}

.speaker-name {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700; margin-bottom: 6px;
}

.speaker-title { font-size: 13px; color: var(--text-muted); line-height: 1.4; }
.speaker-org   { font-size: 12px; color: var(--cyan-soft); margin-top: 4px; font-weight: 500; }

/* ════════════════════════════════════════
   VENUE
════════════════════════════════════════ */
.venue-section {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
  align-items: center;
}

.venue-image-placeholder {
  aspect-ratio: 4/3;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(17,80,204,0.2), rgba(5,104,166,0.08));
  border: 1px solid var(--white-15);
  display: flex; align-items: center; justify-content: center;
  font-size: 80px;
}

.venue-details { display: flex; flex-direction: column; gap: 20px; }

.venue-info-row {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 20px;
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 10px;
}

.venue-info-icon  { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.venue-info-label { font-size: 12px; color: var(--text-muted); letter-spacing: 0.5px; margin-bottom: 4px; }
.venue-info-value { font-size: 15px; font-weight: 500; }

/* ════════════════════════════════════════
   SPONSORS
════════════════════════════════════════ */
.sponsors-row {
  display: flex; flex-wrap: wrap; gap: 16px;
  justify-content: center; margin-top: 48px;
}

.sponsor-badge {
  padding: 16px 32px; border-radius: 10px;
  background: var(--white-08); border: 1px solid var(--white-15);
  font-family: var(--font-display); font-weight: 700;
  font-size: 15px; color: var(--white-80);
  letter-spacing: 0.5px;
  transition: border-color 0.2s, color 0.2s;
}

.sponsor-badge:hover { border-color: var(--gold); color: var(--gold); }

/* ════════════════════════════════════════
   CTA SECTION
════════════════════════════════════════ */
.cta-section { text-align: center; padding: 100px 5vw; }

.cta-card {
  max-width: 800px; margin: 0 auto;
  background: linear-gradient(135deg, rgba(11,108,181,0.12), rgba(5,104,166,0.04));
  border: 1px solid rgba(11,108,181,0.30);
  border-radius: 24px;
  padding: 80px 60px;
  position: relative; overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center top, rgba(11,108,181,0.15), transparent 70%);
  pointer-events: none;
}

.cta-card h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 800; letter-spacing: -1px; margin-bottom: 20px;
}

.cta-card p { color: var(--white-80); font-size: 17px; margin-bottom: 40px; font-weight: 300; }

.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ════════════════════════════════════════
   INNER PAGE CONTENT CARD
   (use .content-card for inner page text)
════════════════════════════════════════ */
.content-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 16px;
  padding: 40px 48px;
  margin-bottom: 24px;
}

.content-card h3 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 700;
  margin-bottom: 14px; color: var(--white);
}

.content-card p {
  color: var(--white-80); font-size: 15px;
  line-height: 1.8; margin-bottom: 14px;
}

.content-card p:last-child { margin-bottom: 0; }

/* Generic info table (useful for fees, committee, etc.) */
.info-table {
  width: 100%; border-collapse: collapse; margin-top: 32px;
}

.info-table th {
  background: var(--blue-bright);
  color: #fff;
  font-family: var(--font-display); font-size: 13px;
  font-weight: 700; letter-spacing: 0.5px;
  padding: 14px 20px; text-align: left;
}

.info-table td {
  padding: 14px 20px;
  font-size: 14px; color: var(--white-80);
  border-bottom: 1px solid var(--white-08);
}

.info-table tr:hover td { background: var(--white-08); }

/* ════════════════════════════════════════
   COMMITTEE / ADVISORY CARDS
════════════════════════════════════════ */
.committee-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px; margin-top: 48px;
}

.committee-card {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 14px; padding: 24px;
  transition: transform 0.2s, border-color 0.2s;
}

.committee-card:hover {
  transform: translateY(-4px);
  border-color: rgba(5,104,166,0.4);
}

.committee-name {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700; margin-bottom: 6px;
}

.committee-role  { font-size: 13px; color: var(--cyan); margin-bottom: 4px; font-weight: 500; }
.committee-affil { font-size: 12px; color: var(--text-muted); }

/* ════════════════════════════════════════
   CONTACT FORM
════════════════════════════════════════ */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  margin-top: 56px; align-items: start;
}

.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }

.form-group label {
  font-size: 13px; font-weight: 600; color: var(--white-80); letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: var(--font-body); font-size: 15px;
  color: var(--white);
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue-bright);
}

.form-group textarea { min-height: 140px; resize: vertical; }

.contact-info-list { display: flex; flex-direction: column; gap: 20px; margin-top: 16px; }

.contact-info-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 20px;
  background: var(--white-08);
  border: 1px solid var(--white-15);
  border-radius: 12px;
}

.contact-info-icon { font-size: 22px; flex-shrink: 0; }
.contact-info-label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.contact-info-value { font-size: 15px; font-weight: 500; }

/* ════════════════════════════════════════
   FOOTER
════════════════════════════════════════ */
footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--white-08);
  padding: 60px 5vw 40px;
}

.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px; margin-bottom: 48px;
}

.footer-logo    { font-family: var(--font-display); font-size: 22px; font-weight: 800; margin-bottom: 12px; }
.footer-tagline { color: var(--text-muted); font-size: 13px; line-height: 1.6; max-width: 260px; }

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 16px;
}

.footer-col ul  { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a   { color: var(--white-80); text-decoration: none; font-size: 13.5px; transition: color 0.2s; }
.footer-col a:hover { color: var(--cyan); }

.footer-bottom {
  border-top: 1px solid var(--white-08);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}

.footer-copy { font-size: 13px; color: var(--text-muted); }

/* ════════════════════════════════════════
   SCROLL ANIMATIONS
════════════════════════════════════════ */
.fade-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ════════════════════════════════════════
   RESPONSIVE / MOBILE
════════════════════════════════════════ */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-toggle-label { display: flex; align-items: center; }
  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(185,225,248,0.98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--white-08);
    flex-direction: column;
    gap: 0;
    padding: 20px 0;
    display: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links li a {
    display: block;
    padding: 12px 20px;
  }
  #nav-toggle:checked ~ .nav-links {
    display: flex;
  }
  .dropdown-menu {
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    display: none;
    background: rgba(185,225,248,0.98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--white-08);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    z-index: 998;
    flex-direction: column;
    padding: 8px 0;
  }
  .about-grid,
  .venue-section,
  .contact-grid     { grid-template-columns: 1fr; gap: 40px; }
  .countdown-card   { flex-direction: column; padding: 32px 20px; text-align: center; }
  .countdown-digits { gap: 10px; }
  .countdown-num    { font-size: 40px; min-width: 50px; }
  .topics-grid,
  .dates-grid,
  .speakers-grid,
  .committee-grid   { grid-template-columns: 1fr; }
  .cta-card         { padding: 48px 24px; }
  .footer-grid      { grid-template-columns: 1fr 1fr; }
  .content-card     { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .footer-grid  { grid-template-columns: 1fr; }
  .hero h1      { letter-spacing: -1px; }
  .hero-meta    { gap: 20px; }
}