/* ============================================
   Barcamp Kerala - Minimal Design
   ============================================ */

/* CSS Variables - Light Theme */
:root {
  --color-bg: #FFFFFF;
  --color-bg-alt: #F4F4F5;
  --color-bg-card: #FFFFFF;
  --color-text: #18181B;
  --color-text-muted: #71717A;
  --color-accent: #EA580C;
  --color-accent-light: #FFF7ED;
  --color-accent-glow: rgba(249, 115, 22, 0.1);
  --color-dark: #000000;
  --color-white: #FFFFFF;
  --color-border: #E4E4E7;
  --color-border-light: #D4D4D8;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(249, 115, 22, 0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s ease;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.03);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 88px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logo img {
  height: 90px;
  width: auto;
  transition: transform var(--transition);
}

.logo:hover img {
  transform: scale(1.02);
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0 auto;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 100px;
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--color-text);
  background: var(--color-bg-alt);
}

.nav-cta {
  background: linear-gradient(135deg, var(--color-accent) 0%, #C2410C 100%);
  color: var(--color-white);
  padding: 12px 28px;
  border-radius: 100px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(234, 88, 12, 0.25);
  flex-shrink: 0;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(234, 88, 12, 0.35);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.mobile-toggle:hover {
  background: var(--color-bg-alt);
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}

.hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.shape-1 {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.15) 0%, rgba(251, 146, 60, 0.1) 100%);
  top: -200px;
  right: -100px;
  animation: float 20s ease-in-out infinite;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, rgba(234, 88, 12, 0.1) 0%, rgba(254, 215, 170, 0.15) 100%);
  bottom: -100px;
  left: -100px;
  animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: rgba(234, 88, 12, 0.08);
  top: 40%;
  left: 30%;
  animation: float 15s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #22C55E;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.badge-divider {
  width: 1px;
  height: 16px;
  background: var(--color-border);
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: var(--color-text);
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-accent) 0%, #C2410C 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
  max-width: 480px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 48px;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #C2410C 100%);
  color: var(--color-white);
  padding: 16px 28px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(234, 88, 12, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(234, 88, 12, 0.35);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.btn-primary:hover .btn-icon {
  transform: translateX(4px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-muted);
  padding: 16px 24px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
}

.btn-ghost:hover {
  color: var(--color-accent);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  color: var(--color-text);
  padding: 16px 28px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  gap: 40px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat .stat-value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.hero-stat .stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 500px;
}

.hero-card {
  position: absolute;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
  z-index: 2;
}

.hero-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.card-icon {
  font-size: 2rem;
  line-height: 1;
}

.card-content strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.card-content span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.hero-card-1 {
  top: 20px;
  left: 40px;
  animation: cardFloat 6s ease-in-out infinite;
}

.hero-card-2 {
  top: 140px;
  right: 20px;
  animation: cardFloat 6s ease-in-out infinite 1s;
}

.hero-card-3 {
  bottom: 100px;
  left: 20px;
  animation: cardFloat 6s ease-in-out infinite 2s;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero-image {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  height: 400px;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, #FFF7ED 100%);
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
  border: 1px solid rgba(234, 88, 12, 0.1);
}

.hero-image img {
  width: 95%;
  height: auto;
  object-fit: contain;
}

/* ============================================
   Stats Section
   ============================================ */
.stats {
  padding: 80px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 48px;
}

.stat-item {
  text-align: center;
}

.stat-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
}

.stat-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: invert(37%) sepia(93%) saturate(1352%) hue-rotate(8deg) brightness(97%) contrast(92%);
  opacity: 0.8;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ============================================
   About Section
   ============================================ */
.about {
  padding: 120px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.about-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  transition: all var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--color-border-light);
}

.about-icon {
  width: 56px;
  height: 56px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.about-icon img {
  width: 28px;
  height: 28px;
  filter: invert(37%) sepia(93%) saturate(1352%) hue-rotate(8deg) brightness(97%) contrast(92%);
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.about-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ============================================
   Video Section
   ============================================ */
.video-section {
  padding: 100px 0;
  background: var(--color-bg-alt);
}

.video-wrapper {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 60px var(--color-accent-glow);
  border: 1px solid var(--color-border);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
}

/* ============================================
   Countdown Section
   ============================================ */
.countdown {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  color: var(--color-text);
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.countdown::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23F97316' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.countdown .container {
  position: relative;
  z-index: 1;
}

.countdown-header {
  text-align: center;
  margin-bottom: 64px;
}

.countdown-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 0 40px var(--color-accent-glow);
}

.countdown-icon img {
  width: 32px;
  height: 32px;
  filter: invert(37%) sepia(93%) saturate(1352%) hue-rotate(8deg) brightness(97%) contrast(92%);
}

.countdown-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 600;
}

.countdown-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.countdown-item {
  text-align: center;
  min-width: 140px;
}

.countdown-number {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-accent) 0%, #FDBA74 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.countdown-label {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* ============================================
   Speakers Section
   ============================================ */
.speakers {
  padding: 120px 0;
  background: var(--color-bg);
}

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.speaker-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.speaker-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--color-border-light);
}

/* Photo wrapper for gradient border effect */
.speaker-photo-wrapper {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #FDBA74 50%, var(--color-accent) 100%);
  box-shadow: 0 0 30px var(--color-accent-glow);
  transition: all 0.4s ease;
}

.speaker-card:hover .speaker-photo-wrapper {
  transform: scale(1.08);
  box-shadow: 0 0 50px var(--color-accent-glow), 0 0 80px rgba(249, 115, 22, 0.15);
}

.speaker-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 3px solid var(--color-bg-card);
  transition: all 0.4s ease;
}

.speaker-card:hover .speaker-avatar {
  filter: brightness(1.1);
}

.speaker-avatar-placeholder {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-alt) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-accent);
  border: 3px solid var(--color-bg-card);
  transition: all 0.4s ease;
}

.speaker-card:hover .speaker-avatar-placeholder {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-bg-alt) 100%);
}

.speaker-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.speaker-role {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.speaker-company {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 500;
}

.speaker-talk {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 8px;
  font-style: italic;
}

.speaker-social {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 12px;
}

.speaker-social a {
  color: var(--color-text-muted);
  transition: color 0.3s ease;
}

.speaker-social a:hover {
  color: var(--color-accent);
}

.speakers-cta {
  text-align: center;
  margin-top: 64px;
}

.speakers-cta p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* ============================================
   Gallery Section
   ============================================ */
.gallery {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.gallery-masonry {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 200px;
  gap: 20px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  cursor: pointer;
}

.gallery-item.large {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item.tall {
  grid-row: span 2;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.1);
  filter: brightness(0.7);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
  transform: translateY(0);
}

.gallery-label {
  display: inline-block;
  background: var(--color-accent);
  color: white;
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ============================================
   Register Section
   ============================================ */
.register {
  padding: 120px 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.register-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.register-content h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.register-content p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}

.register-features {
  list-style: none;
}

.register-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.register-features li:last-child {
  border-bottom: none;
}

.register-features .check {
  width: 24px;
  height: 24px;
  background: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-weight: 600;
  flex-shrink: 0;
}

.register-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
}

.register-box h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 32px;
}

.register-options {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.register-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
}

.register-option:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  transform: translateX(8px);
}

.register-option-info h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.register-option-info span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.register-option .arrow {
  font-size: 1.5rem;
  color: var(--color-accent);
}

.register-note {
  text-align: center;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============================================
   FAQ Section
   ============================================ */
.faq {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.faq-grid {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 24px 32px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition);
  color: var(--color-text);
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-question .icon {
  font-size: 1.5rem;
  transition: transform var(--transition);
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 32px 24px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   Venue Section
   ============================================ */
.venue {
  padding: 120px 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.venue-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.venue-map {
  border-radius: var(--radius-lg);
  height: 400px;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.venue-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
}

.venue-info h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 24px;
}

.venue-details {
  list-style: none;
}

.venue-details li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.venue-details li:last-child {
  border-bottom: none;
}

.venue-details .icon {
  width: 40px;
  height: 40px;
  background: var(--color-accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.venue-details .icon img {
  width: 20px;
  height: 20px;
  filter: invert(37%) sepia(93%) saturate(1352%) hue-rotate(8deg) brightness(97%) contrast(92%);
}

.venue-details strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.venue-details span {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ============================================
   Sponsors Section
   ============================================ */
.sponsors {
  padding: 80px 0;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.sponsors-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 48px;
}

.sponsor-item {
  opacity: 1;
  transition: opacity var(--transition);
}

.sponsor-item:hover {
  opacity: 0.8;
}

.sponsor-item img {
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

/* ============================================
   Footer
   ============================================ */
footer {
  padding: 80px 0 40px;
  background: var(--color-bg-alt);
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 64px;
}

.footer-brand .logo {
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand .logo img {
  height: 90px;
}

.footer-brand p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-links h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-contact-item img {
  width: 20px;
  height: 20px;
  filter: invert(37%) sepia(93%) saturate(1352%) hue-rotate(8deg) brightness(97%) contrast(92%);
  opacity: 0.8;
}

.footer-bottom {
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 1rem;
  transition: all var(--transition);
}

.social-links a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* ============================================
   Mobile Navigation Menu
   ============================================ */
.mobile-only {
  display: none;
}

.nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  padding: 24px;
  gap: 8px;
  z-index: 1000;
}

.nav-links.active a {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  width: 100%;
}

.nav-links.active a:hover {
  background: var(--color-bg-alt);
}

.nav-links.active .mobile-only {
  display: block;
  margin-top: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.nav-links.active .mobile-register-link {
  background: linear-gradient(135deg, var(--color-accent) 0%, #C2410C 100%);
  color: var(--color-white) !important;
  text-align: center;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.nav-links.active .mobile-register-link:hover {
  background: linear-gradient(135deg, #C2410C 0%, var(--color-accent) 100%);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Responsive Styles
   ============================================ */
@media (max-width: 1024px) {
  nav .container {
    position: relative;
  }

  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .logo img {
    height: 60px;
  }

  nav .container {
    height: 70px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero-visual {
    height: 380px;
    order: -1;
  }

  .hero-card-1 { left: 0; top: 0; }
  .hero-card-2 { right: 0; top: 120px; }
  .hero-card-3 { left: 0; bottom: 40px; }
  .hero-image { width: 280px; height: 280px; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

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

  .gallery-masonry {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 180px;
  }

  .gallery-item.large {
    grid-column: span 2;
    grid-row: span 2;
  }

  .register-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .venue-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand .logo img {
    height: 60px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }

  .section-header {
    margin-bottom: 48px;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-desc {
    font-size: 1rem;
  }

  .about, .speakers, .gallery, .register, .venue {
    padding: 80px 0;
  }

  .stats {
    padding: 60px 0;
  }

  .countdown {
    padding: 60px 0;
  }

  .hero-card {
    padding: 14px 18px;
  }

  .hero-card .card-content strong {
    font-size: 0.85rem;
  }

  .hero-card .card-content span {
    font-size: 0.75rem;
  }

  .card-icon {
    font-size: 1.5rem;
  }
}

@media (max-width: 640px) {
  .logo img {
    height: 50px;
  }

  nav .container {
    height: 60px;
  }

  .hero {
    padding: 80px 0 60px;
    min-height: auto;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-visual {
    display: none;
  }

  .hero-stats {
    gap: 32px;
  }

  .hero-stat .stat-value {
    font-size: 1.5rem;
  }

  .hero-stat .stat-label {
    font-size: 0.75rem;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 8px 14px;
    gap: 8px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 32px;
  }

  .btn-primary, .btn-ghost {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
  }

  .btn-ghost {
    background: var(--color-bg-alt);
    border-radius: 14px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .stat-icon {
    width: 40px;
    height: 40px;
  }

  .speakers-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .speaker-card {
    padding: 24px;
  }

  .gallery-masonry {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 120px;
  }

  .gallery-item.large {
    grid-column: span 2;
    grid-row: span 1;
  }

  .gallery-item.tall {
    grid-row: span 1;
  }

  .countdown-header {
    margin-bottom: 40px;
  }

  .countdown-icon {
    width: 50px;
    height: 50px;
  }

  .countdown-icon img {
    width: 24px;
    height: 24px;
  }

  .countdown-header h2 {
    font-size: 1.5rem;
  }

  .countdown-grid {
    gap: 16px;
  }

  .countdown-number {
    font-size: 2.5rem;
  }

  .countdown-item {
    min-width: 70px;
  }

  .countdown-label {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
  }

  .register-content h2 {
    font-size: 1.75rem;
  }

  .register-box {
    padding: 24px 20px;
  }

  .register-box h3 {
    font-size: 1.25rem;
  }

  .register-option {
    padding: 18px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 1rem;
  }

  .faq-answer-content {
    padding: 0 20px 18px;
  }

  .venue-info h2 {
    font-size: 1.5rem;
  }

  .venue-map {
    height: 250px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-brand .logo img {
    height: 50px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .sponsors-grid {
    gap: 24px;
  }

  .sponsor-item img {
    height: 35px;
    max-width: 150px;
  }
}