:root {
  /* ═══════════════════════════════════════════════════════════════════
     2026 REBUILDER — Unified Blue System (#4B6ADE)
  ═══════════════════════════════════════════════════════════════════ */
  --bg-blue: #B9CEF0; /* 포스터 상단 블루 */
  --bg-cream: #F4E8DE; /* 포스터 하단 크림 */
  --brand-navy: #1e3a5f; /* 포스터의 짙은 네이비 (텍스트용) */
  
  /* Unified Blue - #4B6ADE 중심 */
  --hero-blue: #4B6ADE;
  --hero-blue-light: #6B8AEE;
  --hero-blue-dark: #3B5ACE;
  
  /* Legacy Aliases (모두 hero-blue 계열로 통일) */
  --accent-primary: #4B6ADE;
  --accent-light: #6B8AEE;
  --accent-dark: #3B5ACE;
  --accent-brick: #4B6ADE;
  
  /* CTA Button - #F7953F 중심 */
  --cta-orange: #F7953F;
  --cta-orange-light: #FFA95F;
  --cta-orange-dark: #E7852F;

  --white-glass: rgba(255, 255, 255, 0.8);
  --border-glass: rgba(75, 106, 222, 0.12);

  --text-main: #0f172a;
  --text-muted: #475569;

  --radius-xl: 32px;
  --radius-lg: 24px;
  --container: 1100px;
}

/* ═══════════════════════════════════════════════════════════════════
   PREMIUM OVERLAYS & CURSOR
  ═══════════════════════════════════════════════════════════════════ */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("https://grainy-gradients.vercel.app/noise.svg");
  opacity: 0.04;
  pointer-events: none;
  z-index: 9999;
}

#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent-primary), var(--accent-light));
  z-index: 10001;
  transition: width 0.1s;
}

.custom-cursor {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 2px solid var(--accent-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s, background 0.3s, border-color 0.3s;
  display: none;
}

@media (hover: hover) {
  .custom-cursor {
    display: block;
  }
}

.custom-cursor.hover {
  width: 60px;
  height: 60px;
  background: rgba(75, 106, 222, 0.15);
  border-color: var(--accent-dark);
}

/* ═══════════════════════════════════════════════════════════════════
   ANIMATIONS
═══════════════════════════════════════════════════════════════════ */
@keyframes liquid {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(10deg);
  }
}

@keyframes titlePulse {
  0%,
  100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.015);
    filter: brightness(1.1);
  }
}

@keyframes scrollLine {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  50% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(100%);
    opacity: 0;
  }
}

@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

html {
  scroll-behavior: smooth;
}

body {
  /* 2026 REBUILDER - Poster Style Gradient (#B9CEF0 → #F4E8DE) */
  background: 
    linear-gradient(180deg, #B9CEF0 0%, #d4e0f5 30%, #e8e4e0 60%, #F4E8DE 100%),
    linear-gradient(rgba(75, 106, 222, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 106, 222, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  background-attachment: fixed;
  color: var(--text-main);
  font-family: "Pretendard Variable", sans-serif;
  margin: 0;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container-narrow {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ═══════════════════════════════════════════════════════════════════
   HEADER
═══════════════════════════════════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: min(92%, var(--container));
  z-index: 100;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  padding: 12px 28px;
  box-shadow: 0 10px 30px rgba(30, 58, 95, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-title {
  font-weight: 950;
  font-size: 1.3rem;
  color: var(--brand-navy);
  letter-spacing: -0.04em;
}

.nav {
  display: flex !important;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: var(--brand-navy);
  opacity: 0.7;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: opacity 0.3s;
}
.nav-link:hover {
  opacity: 1;
}

/* ═══════════════════════════════════════════════════════════════════
   ULTRA IMPACT HERO SECTION
═══════════════════════════════════════════════════════════════════ */
/* ═══════════════════════════════════════════════════════════════════
   ULTRA IMPACT HERO SECTION (2026 RENEWAL)
═══════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100svh; /* Mobile viewport fix */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
  padding: 0 24px;
  perspective: 1200px; /* For 3D Tilt */
}

/* ═══════════════════════════════════════════════════════════════════
   GEOMETRIC PATTERN BACKGROUND (Blueprint Style)
═══════════════════════════════════════════════════════════════════ */
.hero-geometric-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* Hexagon Grid Pattern */
.hex-grid {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='52' viewBox='0 0 60 52'%3E%3Cpath d='M30 0L60 15v22L30 52 0 37V15z' fill='none' stroke='%234B6ADE' stroke-width='0.5' opacity='0.12'/%3E%3C/svg%3E");
  background-size: 60px 52px;
  opacity: 0.6;
  animation: hexShift 30s linear infinite;
}

@keyframes hexShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-60px, -52px) rotate(0deg); }
}

/* Blueprint Lines */
.blueprint-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    /* 대각선 */
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 100px,
      rgba(75, 106, 222, 0.03) 100px,
      rgba(75, 106, 222, 0.03) 101px
    ),
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 100px,
      rgba(75, 106, 222, 0.03) 100px,
      rgba(75, 106, 222, 0.03) 101px
    ),
    /* 수직/수평 그리드 */
    linear-gradient(rgba(75, 106, 222, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(75, 106, 222, 0.04) 1px, transparent 1px);
  background-size: 200px 200px, 200px 200px, 80px 80px, 80px 80px;
}

/* Grain Texture Overlay */
.hero-grain-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.035;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: overlay;
}

/* ═══════════════════════════════════════════════════════════════════
   FLOATING BLUR ORBS (Glassmorphism)
═══════════════════════════════════════════════════════════════════ */
.blur-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
}

.orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(75, 106, 222, 0.4) 0%, transparent 70%);
  top: -10%;
  left: -5%;
  animation: orbFloat1 20s ease-in-out infinite;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(247, 149, 63, 0.3) 0%, transparent 70%);
  top: 20%;
  right: -8%;
  animation: orbFloat2 25s ease-in-out infinite;
}

.orb-3 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(185, 206, 240, 0.5) 0%, transparent 70%);
  bottom: 15%;
  left: 10%;
  animation: orbFloat3 22s ease-in-out infinite;
}

.orb-4 {
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(107, 138, 238, 0.35) 0%, transparent 70%);
  top: 60%;
  right: 15%;
  animation: orbFloat4 18s ease-in-out infinite;
}

.orb-5 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(244, 232, 222, 0.4) 0%, transparent 70%);
  bottom: -15%;
  right: 30%;
  animation: orbFloat5 28s ease-in-out infinite;
}

.orb-6 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(75, 106, 222, 0.25) 0%, transparent 70%);
  top: 35%;
  left: 25%;
  animation: orbFloat6 24s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, 20px) scale(1.05); }
  50% { transform: translate(10px, 40px) scale(0.95); }
  75% { transform: translate(-20px, 15px) scale(1.02); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-25px, 30px) scale(1.08); }
  66% { transform: translate(15px, -20px) scale(0.92); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.1); }
}

@keyframes orbFloat4 {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(-15px, 25px); }
  75% { transform: translate(20px, -15px); }
}

@keyframes orbFloat5 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  40% { transform: translate(-30px, -25px) scale(1.05); }
  80% { transform: translate(25px, 15px) scale(0.95); }
}

@keyframes orbFloat6 {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.5; }
  50% { transform: translate(35px, 25px) scale(1.15); opacity: 0.7; }
}

/* Kinetic Marquee Background */
.hero-marquee-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-5deg);
  width: 150vw;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
  opacity: 0.06;
}

.hero-marquee-track {
  display: flex;
  gap: 40px;
  animation: marquee-slow 60s linear infinite;
  white-space: nowrap;
}

.stroked-text {
  font-size: 18vw;
  font-weight: 950;
  font-style: italic;
  -webkit-text-stroke: 2px var(--brand-navy);
  color: transparent;
  font-family: "JetBrains Mono";
  letter-spacing: -0.05em;
}

@keyframes marquee-slow {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Floating Objects: Glassmorphism */
.floating-obj {
  position: absolute;
  backdrop-filter: blur(8px);
  z-index: 1;
  pointer-events: none;
  transition: transform 0.1s linear; /* Smooth parallax */
}

.glass-circle {
  background: radial-gradient(circle at 30% 30%, rgba(75, 106, 222, 0.45), rgba(96, 165, 250, 0.15));
  border-radius: 50%;
  box-shadow: inset -5px -5px 20px rgba(255, 255, 255, 0.2), 0 10px 30px rgba(75, 106, 222, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-pill {
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.4), rgba(30, 58, 95, 0.1));
  border-radius: 100px;
  box-shadow: 0 10px 30px rgba(30, 58, 95, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hero Content & 3D Typography */
.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1100px;
  transform-style: preserve-3d;
}


.hero-kicker {
  color: var(--hero-blue);
  font-weight: 800;
  letter-spacing: 0.2em;
  font-size: 0.95rem;
  margin-bottom: 30px;
  display: block;
  text-transform: uppercase;
  animation: fadeInDown 1.2s cubic-bezier(0.23, 1, 0.32, 1) forwards;
  opacity: 0;
}

.title-3d-wrapper {
  perspective: 1000px; /* Local perspective for title */
}

.hero-title {
  font-size: clamp(4.5rem, 16vw, 10rem);
  font-weight: 950;
  line-height: 0.8;
  letter-spacing: -0.06em;
  margin: 0 0 40px;
  position: relative;
  transform-style: preserve-3d;
  color: var(--brand-navy);
}

.hero-title span {
  display: inline-block;
  opacity: 0;
  transform: translateY(80px) rotateX(-20deg) scale(0.9);
  transition: all 1s cubic-bezier(0.16, 1, 0.3, 1);
  /* #4B6ADE 중심 그라디언트 */
  background: linear-gradient(135deg, var(--hero-blue-dark) 0%, var(--hero-blue) 50%, var(--hero-blue-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  /* Blue Glow */
  text-shadow: 0 20px 60px rgba(75, 106, 222, 0.3);
}

.hero-title span.reveal {
  opacity: 1;
  transform: translateY(0) rotateX(0deg) scale(1);
}

.hero-title::after {
  content: "2026";
  position: absolute;
  top: -20px;
  right: -10px;
  font-family: "JetBrains Mono";
  font-size: 1.2rem;
  color: var(--hero-blue);
  letter-spacing: 0.2em;
  font-weight: 800;
  opacity: 0;
  animation: fadeIn 1s ease 1s forwards;
}

.hero-lead {
  font-size: clamp(1.2rem, 3.5vw, 1.5rem);
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 50px;
  word-break: keep-all;
  font-weight: 600;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 1s cubic-bezier(0.23, 1, 0.32, 1) 0.6s forwards;
}

.hero-gradient-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 300px;
  background: linear-gradient(to top, #d4e0f5, transparent);
  z-index: 2;
  pointer-events: none;
}

/* Liquid Button */
.liquid-btn {
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.liquid-btn .btn-text {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
}

.liquid-btn .liquid-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300%;
  height: 300%;
  background: radial-gradient(circle, var(--hero-blue-light), var(--hero-blue-dark));
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  border-radius: 50%;
  z-index: 1;
}

.liquid-btn:hover .liquid-bg {
  transform: translate(-50%, -50%) scale(1);
}

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════════════════════
   PREVIOUS SECTIONS (UNCHANGED BUT LINKED)
═══════════════════════════════════════════════════════════════════ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(180px, auto);
  gap: 20px;
  padding: 20px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 20px 0;
}

.bento-item {
  background: var(--white-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 35px;
  box-shadow: 0 15px 35px rgba(30, 58, 95, 0.03);
  transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
}

.bento-item::before {
  content: "";
  position: absolute;
  top: var(--y, 0);
  left: var(--x, 0);
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(75, 106, 222, 0.12),
    transparent 70%
  );
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 0;
}
.bento-item:hover::before {
  opacity: 1;
}

.bento-item:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 40px 80px rgba(75, 106, 222, 0.15);
  background: white;
  border-color: var(--accent-primary);
}

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

.card-kicker {
  font-family: "JetBrains Mono", monospace;
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* ═══════════════════════════════════════════════════════════════════
   CINEMATIC VISUAL
═══════════════════════════════════════════════════════════════════ */
.section-visual-wide {
  padding: 100px 0;
  background: rgba(255, 255, 255, 0.15);
}

.visual-container {
  max-width: 1100px;
  aspect-ratio: 16 / 9;
  margin: 0 auto;
  position: relative;
  background: #000;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 50px 120px rgba(0, 0, 0, 0.35);
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-bg-blur {
  position: absolute;
  top: -10%;
  left: -10%;
  width: 120%;
  height: 120%;
  background: url("assets/re-builder-poster.jpeg") no-repeat center/cover;
  filter: blur(50px) brightness(0.4);
  z-index: 0;
  opacity: 0.7;
}

.visual-container img.poster-main {
  position: relative;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  z-index: 1;
  transition: transform 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
}

.visual-container:hover img.poster-main {
  transform: scale(1.04);
}

/* ═══════════════════════════════════════════════════════════════════
   LIGHTBOX
═══════════════════════════════════════════════════════════════════ */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(30, 58, 95, 0.97);
  backdrop-filter: blur(20px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  cursor: zoom-out;
}
.lightbox.active {
  display: flex;
  animation: fadeIn 0.4s ease;
}
.lightbox img {
  max-width: 92%;
  max-height: 92%;
  border-radius: 8px;
  box-shadow: 0 60px 120px rgba(0, 0, 0, 0.6);
  transform: scale(0.85);
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.lightbox.active img {
  transform: scale(1);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   MODERN SCHEDULE UPGRADE
═══════════════════════════════════════════════════════════════════ */
.schedule-card-group {
  display: grid;
  gap: 10px;
  margin-top: 0;
  position: relative;
}

.schedule-card-group::before {
  content: "";
  position: absolute;
  left: 35px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--accent-primary) 0,
    var(--accent-primary) 4px,
    transparent 4px,
    transparent 8px
  );
  opacity: 0.2;
  z-index: 0;
}

.schedule-card {
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 16px;
  padding: 16px 20px;
  display: flex;
  gap: 20px;
  align-items: center;
  position: relative;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
  z-index: 1;
}

.schedule-card:hover {
  transform: translateY(-3px) translateX(5px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 15px 35px rgba(75, 106, 222, 0.12);
  border-color: var(--accent-primary);
}

.schedule-card .time-box {
  flex-shrink: 0;
  width: 70px;
  height: 54px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--brand-navy);
  color: white;
  border-radius: 12px;
  transition: background 0.3s ease;
  gap: 2px;
}
.schedule-card:hover .time-box {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-dark));
}

.schedule-card .time-box .time {
  font-family: "JetBrains Mono";
  font-weight: 800;
  font-size: 1rem;
  line-height: 1;
}
.schedule-card .time-box .ampm {
  font-size: 0.6rem;
  opacity: 0.7;
  font-weight: 700;
  text-transform: uppercase;
  line-height: 1;
}

.schedule-card .info-box {
  flex-grow: 1;
}
.schedule-card .info-box h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--brand-navy);
  letter-spacing: -0.02em;
}
.schedule-card .info-box p {
  margin: 3px 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.schedule-card .speaker-tag {
  margin-left: auto;
  padding: 6px 12px;
  background: var(--bg-sky);
  color: var(--brand-navy);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 800;
  white-space: nowrap;
  border: 1px solid var(--border-glass);
}

/* ═══════════════════════════════════════════════════════════════════
   KINETIC MARQUEE
═══════════════════════════════════════════════════════════════════ */
.marquee-container {
  background: linear-gradient(135deg, var(--hero-blue-dark) 0%, var(--hero-blue) 50%, var(--hero-blue-light) 100%);
  color: white;
  padding: 18px 0;
  overflow: hidden;
  white-space: nowrap;
  display: flex;
  font-family: "JetBrains Mono";
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  border-top: 1px solid rgba(75, 106, 222, 0.4);
  border-bottom: 1px solid rgba(75, 106, 222, 0.4);
}

.marquee-content {
  display: inline-block;
  animation: marquee 25s linear infinite;
  padding-right: 50px;
}

/* ═══════════════════════════════════════════════════════════════════
   BUTTONS
═══════════════════════════════════════════════════════════════════ */
.btn-primary {
  background: linear-gradient(135deg, var(--cta-orange-dark) 0%, var(--cta-orange) 50%, var(--cta-orange-light) 100%);
  background-size: 200% 200%;
  background-position: 50% 50%;
  color: white;
  padding: 18px 40px;
  border-radius: 100px;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 
    0 10px 25px rgba(247, 149, 63, 0.4),
    0 0 0 0 rgba(247, 149, 63, 0);
  transition: 
    transform 0.3s cubic-bezier(0.33, 1, 0.68, 1), 
    background 0.5s ease,
    box-shadow 0.4s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  will-change: transform, background;
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.35),
    transparent
  );
  animation: shimmer 2.5s infinite;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--cta-orange) 0%, var(--hero-blue) 50%, var(--hero-blue-light) 100%);
  background-size: 200% 200%;
  background-position: 100% 100%;
  box-shadow: 
    0 20px 40px rgba(247, 149, 63, 0.35),
    0 0 40px rgba(75, 106, 222, 0.25);
  transform: translateY(-3px);
}

/* CTA 펄스 애니메이션 (히어로 섹션용) */
.hero .btn-primary {
  animation: ctaPulse 2.5s ease-in-out infinite;
}

@keyframes ctaPulse {
  0%, 100% { 
    box-shadow: 
      0 10px 25px rgba(247, 149, 63, 0.4),
      0 0 0 0 rgba(247, 149, 63, 0.4);
  }
  50% { 
    box-shadow: 
      0 15px 35px rgba(247, 149, 63, 0.5),
      0 0 0 15px rgba(247, 149, 63, 0);
  }
}

.hero .btn-primary:hover {
  animation: none;
}

.btn-secondary {
  padding: 16px 32px;
  border-radius: 100px;
  font-weight: 800;
  font-size: 1rem;
  color: var(--brand-navy);
  border: 2px solid var(--brand-navy);
  text-decoration: none;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-secondary:hover {
  background: var(--brand-navy);
  color: white;
}

/* ═══════════════════════════════════════════════════════════════════
   SCROLL INDICATOR (스크롤 유도 애니메이션)
═══════════════════════════════════════════════════════════════════ */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  z-index: 20;
  animation: scrollFadeIn 0.8s ease 0.5s forwards;
  opacity: 0;
}

.scroll-text {
  font-family: "JetBrains Mono";
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--hero-blue);
  opacity: 0.7;
}

.scroll-arrow {
  width: 40px;
  height: 40px;
  border: 2px solid var(--hero-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: scrollBounce 2s ease-in-out infinite;
  transition: all 0.3s ease;
}

.scroll-arrow i {
  font-size: 1.5rem;
  color: var(--hero-blue);
}

.scroll-indicator:hover .scroll-arrow {
  background: var(--hero-blue);
  transform: scale(1.1);
}

.scroll-indicator:hover .scroll-arrow i {
  color: white;
}

@keyframes scrollFadeIn {
  to { opacity: 1; }
}

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

/* ═══════════════════════════════════════════════════════════════════
   FAQ ACCORDION
═══════════════════════════════════════════════════════════════════ */
.faq-grid {
  display: grid;
  gap: 16px;
}

.faq-card {
  background: var(--white-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s;
}

.faq-card summary {
  padding: 24px 30px;
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  color: var(--brand-navy);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-card summary::after {
  content: "\F0142"; /* mdi-chevron-down */
  font-family: "Material Design Icons";
  font-size: 1.5rem;
  transition: transform 0.3s;
}

.faq-card[open] summary::after {
  transform: rotate(180deg);
}

.faq-card p {
  padding: 0 30px 24px;
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Helper Classes */
.section-title {
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  font-weight: 950;
  color: var(--brand-navy);
  margin-bottom: 50px;
  text-align: center;
  letter-spacing: -0.05em;
}
.day-label {
  font-family: "JetBrains Mono";
  font-weight: 800;
  border-bottom: 3px solid;
  display: inline-block;
  padding-bottom: 8px;
  margin: 0;
}
.day-label.brick {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-image: linear-gradient(135deg, var(--accent-dark), var(--accent-light)) 1;
}
.day-label.navy {
  color: var(--brand-navy);
  border-color: var(--brand-navy);
}
.navy {
  color: var(--brand-navy);
}
.sub-info {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════════════
   PREMIUM MOBILE EXPERIENCE
═══════════════════════════════════════════════════════════════════ */
.mobile-sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  padding: 20px 24px 35px;
  background: linear-gradient(
    to top,
    rgba(255, 255, 255, 0.95),
    rgba(255, 255, 255, 0)
  );
  backdrop-filter: blur(15px);
  z-index: 1000;
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  transform: translateY(100%);
  opacity: 0;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.container-narrow {
  padding: 0 24px;
}

/* ═══════════════════════════════════════════════════════════════════
   MOBILE NAVIGATION
═══════════════════════════════════════════════════════════════════ */
.mobile-menu-toggle {
  display: none; /* Desktop hidden */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 2002;
  position: relative;
  -webkit-tap-highlight-color: transparent;
  outline: none;
  touch-action: manipulation;
}

/* When menu is open, pull toggle above overlay */
.mobile-menu-toggle.active {
  position: fixed;
  top: 28px;
  right: 30px;
  z-index: 2010;
}

.mobile-menu-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--brand-navy);
  margin: 5px 0;
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  border-radius: 4px;
}

/* Hamburger Animation */
.mobile-menu-toggle.active .bar.top {
  transform: translateY(7px) rotate(45deg);
  background: white;
}
.mobile-menu-toggle.active .bar.mid {
  opacity: 0;
}
.mobile-menu-toggle.active .bar.bot {
  transform: translateY(-7px) rotate(-45deg);
  background: white;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(30, 58, 95, 0.98);
  backdrop-filter: blur(20px);
  z-index: 2001; /* Header is 100, Lightbox is 2000 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-overlay.active .mobile-menu-close {
  pointer-events: auto; /* 메뉴 열렸을 때만 닫기 버튼 클릭 가능 */
}

/* Mobile Menu Close Button */
.mobile-menu-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none; /* 기본: 클릭 불가 (햄버거 버튼과 겹침 방지) */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu-close:active {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(0.95);
}

.mobile-menu-close .close-bar {
  position: absolute;
  width: 28px;
  height: 3px;
  background: white;
  border-radius: 2px;
}

.mobile-menu-close .close-bar:first-child {
  transform: rotate(45deg);
}

.mobile-menu-close .close-bar:last-child {
  transform: rotate(-45deg);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 30px;
  text-align: center;
}

.mobile-link {
  font-family: "JetBrains Mono";
  font-size: 2rem;
  font-weight: 800;
  color: white;
  text-decoration: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.mobile-menu-overlay.active .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-menu-overlay.active .mobile-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu-overlay.active .mobile-link:nth-child(2) { transition-delay: 0.2s; }
.mobile-menu-overlay.active .mobile-link:nth-child(3) { transition-delay: 0.3s; }
.mobile-menu-overlay.active .mobile-menu-cta { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }

.mobile-menu-cta {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
  margin-top: 20px;
  background: white !important;
  color: var(--brand-navy) !important;
}

@media (max-width: 1000px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title {
    font-size: clamp(3.5rem, 10vw, 5.5rem);
  }
}

@media (max-width: 600px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav {
    display: none !important;
  }

  .site-header {
    position: fixed;
    width: auto;
    left: 20px;
    right: 20px;
    top: 16px;
    transform: none;
    padding: 12px 20px;
    box-sizing: border-box;
    border-radius: 20px;
  }
  
  .header-inner {
    width: 100%;
  }
  
  .brand-title {
    font-size: 1.1rem;
  }

  .mobile-sticky-cta {
    display: block;
  }

  footer {
    padding-bottom: 140px !important;
  }

  .hero {
    height: 100svh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
    min-height: -webkit-fill-available;
    padding: 80px 24px 120px; /* top for header, bottom for scroll indicator */
    text-align: center;
    align-items: center;
    justify-content: center;
    overflow: hidden; /* Keep hidden to prevent layout break */
    box-sizing: border-box;
  }
  
  /* Hide marquee on mobile to prevent 150vw overflow */
  .hero-marquee-wrapper {
    display: none !important;
  }
  
  /* Hide floating objects on mobile for cleaner layout */
  .floating-obj {
    display: none;
  }
  
  .blur-orb {
    opacity: 0.3;
    transform: scale(0.5);
  }

  .hero-bg-text {
    font-size: 55vw;
    top: 30%;
    left: -15%;
    transform: translate(0, -50%);
  }

  .hero-title {
    font-size: 3.8rem;
    text-align: center;
    margin-left: 0;
    margin-bottom: 20px;
    line-height: 0.85;
    position: relative;
  }
  
  /* Hide 2026 badge on mobile */
  .hero-title::after {
    display: none !important;
  }
  
  .hero-kicker {
    margin-bottom: 14px;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
  }

  .hero-lead {
    text-align: center;
    margin: 0 auto 28px;
    font-size: 0.95rem;
    line-height: 1.7;
    font-weight: 600;
    max-width: 300px;
  }
  
  .hero-cta-group {
    flex-direction: column !important;
    width: 100% !important;
    max-width: 300px;
    margin: 0 auto;
    gap: 12px !important;
    box-sizing: border-box;
  }
  
  /* Scroll Indicator - Mobile */
  .scroll-indicator {
    bottom: 24px;
    left: 0;
    right: 0;
    margin: 0 auto;
    width: fit-content;
    transform: none; /* Remove translateX */
    opacity: 1 !important;
    animation: scrollBounceMobile 2s ease-in-out infinite !important;
    z-index: 50;
  }
  
  @keyframes scrollBounceMobile {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
  }
  
  .scroll-text {
    font-size: 0.6rem;
    opacity: 0.8;
  }
  
  .scroll-arrow {
    width: 34px;
    height: 34px;
    border-width: 2px;
  }
  
  .scroll-arrow i {
    font-size: 1.2rem;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 100%;
    padding: 18px 20px;
    border-radius: 18px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  .bento-grid,
  .grid-3 {
    grid-template-columns: 1fr !important;
    gap: 16px;
  }

  .bento-item {
    padding: 30px 24px;
    border-radius: 24px;
  }

  .bento-item.medium,
  .bento-item.large {
    grid-column: span 1 !important;
  }

  .schedule-card-group::before {
    display: none;
  }

  .schedule-card {
    margin-left: 0;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 14px;
    flex-direction: row;
    align-items: flex-start;
  }
  
  .schedule-card .time-box {
    width: 56px;
    height: 44px;
    flex-shrink: 0;
    background: var(--brand-navy) !important;
    color: white;
    padding: 0;
    align-items: center;
    flex-direction: column;
    gap: 2px;
    border-radius: 10px;
    margin-top: 2px;
  }
  
  .schedule-card .time-box .time {
    font-size: 0.9rem;
    color: white;
  }
  
  .schedule-card .time-box .ampm {
    font-size: 0.55rem;
    color: white;
    opacity: 0.7;
  }
  
  .schedule-card .info-box {
    flex: 1;
    min-width: 0;
  }
  
  .schedule-card .info-box h4 {
    font-size: 0.95rem;
  }
  
  .schedule-card .info-box p {
    font-size: 0.8rem;
    line-height: 1.4;
    word-break: keep-all;
    white-space: normal;
  }

  .schedule-card .speaker-tag {
    display: none;
  }

  .visual-container {
    aspect-ratio: 1 / 1.4;
  }

  .section-title {
    font-size: 2.6rem;
    text-align: left;
  }

  .grid-3 .bento-item:last-child {
    background: var(--brand-navy) !important;
    color: white !important;
  }
  
  /* FAQ for Mobile */
  .faq-card summary {
    padding: 20px 24px;
    font-size: 0.95rem;
  }
  .faq-card p {
    padding: 0 24px 24px;
    font-size: 0.9rem;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   SCHEDULE TABS UI
═══════════════════════════════════════════════════════════════════ */
.schedule-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.schedule-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 20px 48px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border: 2px solid var(--border-glass);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  position: relative;
  overflow: hidden;
}

.schedule-tab::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-dark));
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 0;
}

.schedule-tab .tab-day {
  font-family: "JetBrains Mono";
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--brand-navy);
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}

.schedule-tab .tab-date {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}

.schedule-tab:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: 0 15px 40px rgba(75, 106, 222, 0.15);
}

.schedule-tab.active {
  border-color: transparent;
  box-shadow: 0 20px 50px rgba(75, 106, 222, 0.25);
  transform: translateY(-4px);
}

.schedule-tab.active::before {
  opacity: 1;
}

.schedule-tab.active .tab-day,
.schedule-tab.active .tab-date {
  color: white;
}

/* 탭 콘텐츠 */
.schedule-tab-content {
  position: relative;
}

.schedule-panel {
  display: none;
  animation: tabFadeIn 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.schedule-panel.active {
  display: block;
}

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 탭 내부에서는 day-label 숨김 */
.schedule-panel .schedule-card-group {
  margin-top: 0;
}

/* 모바일 탭 스타일 */
@media (max-width: 600px) {
  .schedule-tabs {
    gap: 12px;
  }
  
  .schedule-tab {
    flex: 1;
    padding: 16px 20px;
    border-radius: 16px;
  }
  
  .schedule-tab .tab-day {
    font-size: 1rem;
  }
  
  .schedule-tab .tab-date {
    font-size: 0.8rem;
  }
}