/* ============================================
   脳情報総合研究プロジェクト — NEXT-GEN UI
   Cyberpunk / Glassmorphism / Neon Design
   ============================================ */

/* --- Reset & Variables --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #06060e;
  --bg-elevated: #0c0c1d;
  --bg-card: rgba(12, 12, 35, 0.6);
  --glass: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-hover: rgba(255, 255, 255, 0.08);

  --cyan: #00f0ff;
  --purple: #b836ff;
  --magenta: #ff2d95;
  --blue: #4361ee;

  /* Research theme colors */
  --eeg-color: #00f0ff;
  --eeg-glow: rgba(0, 240, 255, 0.15);
  --vr-color: #b836ff;
  --vr-glow: rgba(184, 54, 255, 0.15);
  --ai-color: #ff2d95;
  --ai-glow: rgba(255, 45, 149, 0.15);

  --gradient: linear-gradient(135deg, var(--cyan), var(--purple));
  --gradient-text: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 50%, var(--magenta) 100%);

  --text-primary: #eef0fa;
  --text-secondary: rgba(232, 234, 246, 0.7);
  --text-dim: rgba(232, 234, 246, 0.35);

  --font-display: 'Orbitron', 'Inter', sans-serif;
  --font-body: 'Noto Sans JP', 'Inter', -apple-system, sans-serif;

  --radius: 16px;
  --radius-sm: 8px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 240, 255, 0.2) transparent;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

::selection {
  background: rgba(0, 240, 255, 0.25);
  color: var(--cyan);
}

/* --- Grid Overlay (VR perspective grid) --- */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 240, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
}

/* --- Scanline overlay (VR / retro-tech feel) --- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.015) 2px,
    rgba(0, 0, 0, 0.015) 4px
  );
  mix-blend-mode: multiply;
}

/* --- Data stream decoration (AI) --- */
@keyframes dataStream {
  0%   { background-position: 0 0; }
  100% { background-position: 0 -200px; }
}

/* --- EEG brainwave decoration --- */
@keyframes brainwavePulse {
  0%, 100% { opacity: 0.3; transform: scaleX(1); }
  50% { opacity: 0.6; transform: scaleX(1.02); }
}

/* --- Cursor Glow --- */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  will-change: left, top;
}

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

/* --- Glassmorphism Card --- */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.glass-card:hover {
  border-color: rgba(0, 240, 255, 0.2);
  transform: translateY(-4px);
  box-shadow:
    0 0 30px rgba(0, 240, 255, 0.05),
    0 20px 60px rgba(0, 0, 0, 0.3);
}

/* --- Gradient Text --- */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(6, 6, 14, 0.7);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.4s var(--ease);
}

.header.scrolled {
  background: rgba(6, 6, 14, 0.92);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.3), 0 1px 0 rgba(0, 240, 255, 0.06);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon-wrap {
  width: 40px;
  height: 40px;
  position: relative;
}

.logo-icon-wrap--sm {
  width: 32px;
  height: 32px;
}

.logo-svg {
  width: 100%;
  height: 100%;
  animation: logoSpin 20s linear infinite;
}

@keyframes logoSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-main {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-size: 0.6rem;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}

/* Nav */
.nav {
  display: flex;
  gap: 36px;
}

.nav a {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s var(--ease);
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gradient);
  transition: width 0.4s var(--ease);
}

.nav a:hover {
  color: var(--cyan);
}

.nav a:hover::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 110;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all 0.3s var(--ease);
  transform-origin: center;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5.5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5.5px); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg-primary);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -30%;
  width: 80%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
  animation: heroGlow1 8s ease-in-out infinite alternate;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -40%;
  right: -20%;
  width: 70%;
  height: 70%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 54, 255, 0.06) 0%, transparent 60%);
  animation: heroGlow2 10s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow1 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(5%, 8%) scale(1.15); }
}

@keyframes heroGlow2 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-5%, -8%) scale(1.1); }
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 24px;
  max-width: 800px;
}

/* Hero Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease) 0.2s forwards;
  background: rgba(0, 240, 255, 0.04);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
  box-shadow: 0 0 8px var(--cyan);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Hero Title */
.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-title-line {
  display: block;
  overflow: hidden;
}

.hero-title-text {
  display: inline-block;
  opacity: 0;
  animation: titleReveal 1s var(--ease) forwards;
}

.hero-title-line:nth-child(1) .hero-title-text { animation-delay: 0.4s; }
.hero-title-line:nth-child(2) .hero-title-text { animation-delay: 0.6s; }

@keyframes titleReveal {
  from { opacity: 0; transform: translateY(100%); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glitch Effect */
.glitch {
  position: relative;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
}

.glitch::before {
  color: var(--cyan);
  animation: glitch1 4s infinite linear alternate-reverse;
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}

.glitch::after {
  color: var(--magenta);
  animation: glitch2 4s infinite linear alternate-reverse;
  clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
}

@keyframes glitch1 {
  0%, 90%, 100% { opacity: 0; transform: translate(0); }
  92% { opacity: 0.8; transform: translate(-3px, -1px); }
  94% { opacity: 0; transform: translate(3px, 1px); }
  96% { opacity: 0.6; transform: translate(-2px, 1px); }
  98% { opacity: 0; }
}

@keyframes glitch2 {
  0%, 90%, 100% { opacity: 0; transform: translate(0); }
  91% { opacity: 0.8; transform: translate(3px, 1px); }
  93% { opacity: 0; transform: translate(-3px, -1px); }
  95% { opacity: 0.6; transform: translate(2px, -1px); }
  97% { opacity: 0; }
}

/* Hero desc */
.hero-desc {
  font-family: var(--font-display);
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  margin-bottom: 36px;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease) 0.8s forwards;
}

/* Hero Buttons */
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease) 1s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
  border: none;
}

.btn--primary {
  background: var(--gradient);
  color: var(--bg-primary);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn--primary:hover::before {
  opacity: 1;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 0 20px rgba(0, 240, 255, 0.3),
    0 0 60px rgba(0, 240, 255, 0.1);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn--ghost:hover {
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--cyan);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.05);
  transform: translateY(-2px);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease) 1.2s forwards;
}

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

.hero-stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 4.5ch;
  text-align: center;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.hero-stat-label {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background: var(--glass-border);
}

/* Hero Scroll */
.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: fit-content;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 5;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease) 1.5s forwards;
}

.hero-scroll-mouse {
  width: 22px;
  height: 34px;
  border: 1.5px solid var(--text-dim);
  border-radius: 11px;
  position: relative;
}

.hero-scroll-wheel {
  width: 3px;
  height: 8px;
  background: var(--cyan);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 2s ease infinite;
  box-shadow: 0 0 6px var(--cyan);
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

.hero-scroll-indicator span {
  font-family: var(--font-display);
  font-size: 0.55rem;
  color: var(--text-dim);
  letter-spacing: 0.3em;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: 120px 0;
  position: relative;
  z-index: 2;
}

.section--alt {
  background: var(--bg-elevated);
}

/* Section decoration — EEG brainwave pattern */
.section-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  pointer-events: none;
  overflow: hidden;
  opacity: 0.5;
}

.section-decoration svg {
  width: 100%;
  height: 100%;
}

.eeg-wave {
  animation: brainwavePulse 4s ease-in-out infinite;
}

.eeg-wave--2 {
  animation-delay: 1s;
}

/* Section Header */
.section-header {
  margin-bottom: 64px;
  position: relative;
}

.section-num {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.2em;
  display: block;
  margin-bottom: 6px;
  opacity: 0.5;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.section-line {
  width: 60px;
  height: 2px;
  background: var(--gradient);
  margin-top: 20px;
  border-radius: 1px;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
  display: grid;
  gap: 64px;
}

.about-text p {
  font-size: 1rem;
  line-height: 2;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.about-text p:last-child { margin-bottom: 0; }

.about-poster-btn {
  margin-top: 24px;
}

.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Card */
.card {
  padding: 36px 28px;
  text-align: center;
}

/* Per-theme card accents */
.card:nth-child(1) { --card-accent: var(--eeg-color); --card-glow: var(--eeg-glow); }
.card:nth-child(2) { --card-accent: var(--vr-color); --card-glow: var(--vr-glow); }
.card:nth-child(3) { --card-accent: var(--ai-color); --card-glow: var(--ai-glow); }

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--card-accent, var(--cyan));
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  box-shadow: 0 0 12px var(--card-accent, var(--cyan));
}

.card:hover::before {
  opacity: 1;
}

.card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, var(--card-glow, rgba(0, 240, 255, 0.06)) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}

.card:hover .card-glow {
  opacity: 1;
}

.card-icon {
  color: var(--card-accent, var(--cyan));
  margin-bottom: 20px;
  display: inline-flex;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--card-accent, var(--cyan)) 20%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, var(--card-accent, var(--cyan)) 5%, transparent);
  position: relative;
}

/* Holographic shimmer on card icons */
.card-icon::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    transparent 30%,
    color-mix(in srgb, var(--card-accent, var(--cyan)) 15%, transparent) 50%,
    transparent 70%
  );
  background-size: 200% 200%;
  animation: shimmer 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes shimmer {
  0%   { background-position: 200% 200%; }
  50%  { background-position: 0% 0%; }
  100% { background-position: 200% 200%; }
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ============================================
   RESEARCH
   ============================================ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.research-item {
  padding: 40px 32px;
  position: relative;
}

/* Per-theme research accents */
.research-item:nth-child(1) { --r-accent: var(--eeg-color); --r-glow: var(--eeg-glow); }
.research-item:nth-child(2) { --r-accent: var(--vr-color); --r-glow: var(--vr-glow); }
.research-item:nth-child(3) { --r-accent: var(--ai-color); --r-glow: var(--ai-glow); }

.research-item:hover {
  border-color: color-mix(in srgb, var(--r-accent) 25%, transparent);
  box-shadow:
    0 0 30px color-mix(in srgb, var(--r-accent) 8%, transparent),
    0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Left accent bar */
.research-item::before {
  content: '';
  position: absolute;
  top: 32px;
  bottom: 32px;
  left: 0;
  width: 2px;
  background: var(--r-accent, var(--cyan));
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  box-shadow: 0 0 8px var(--r-accent, var(--cyan));
}

.research-item:hover::before {
  opacity: 0.8;
}

.research-tag {
  font-family: var(--font-display);
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--r-accent, var(--cyan));
  letter-spacing: 0.2em;
  padding: 4px 10px;
  border: 1px solid color-mix(in srgb, var(--r-accent, var(--cyan)) 25%, transparent);
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 20px;
  background: color-mix(in srgb, var(--r-accent, var(--cyan)) 6%, transparent);
}

.research-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 900;
  background: linear-gradient(180deg, color-mix(in srgb, var(--r-accent, var(--cyan)) 20%, transparent) 0%, transparent 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.research-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.5;
}

.research-item p {
  font-size: 0.88rem;
  line-height: 1.95;
  color: var(--text-secondary);
}

.research-line {
  position: absolute;
  bottom: 0;
  left: 32px;
  right: 32px;
  height: 1px;
  background: var(--r-accent, var(--cyan));
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  box-shadow: 0 0 8px var(--r-accent, var(--cyan));
}

.research-item:hover .research-line {
  opacity: 1;
}

/* ============================================
   SNS
   ============================================ */
.sns-desc {
  color: var(--text-secondary);
  margin-bottom: 40px;
  margin-top: -40px;
  font-size: 0.9rem;
}

.sns-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.sns-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
}

.sns-icon-wrap {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  flex-shrink: 0;
  transition: all 0.3s var(--ease);
}

.sns-icon {
  width: 22px;
  height: 22px;
}

.sns-x .sns-icon { color: var(--text-primary); }
.sns-x { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1); }

.sns-instagram .sns-icon { color: #E4405F; }
.sns-instagram { background: rgba(228, 64, 95, 0.08); border: 1px solid rgba(228, 64, 95, 0.15); }

.sns-line .sns-icon { color: #06C755; }
.sns-line { background: rgba(6, 199, 85, 0.08); border: 1px solid rgba(6, 199, 85, 0.15); }

.sns-youtube .sns-icon { color: #FF0000; }
.sns-youtube { background: rgba(255, 0, 0, 0.08); border: 1px solid rgba(255, 0, 0, 0.15); }

.sns-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.sns-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.sns-id {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-display);
  letter-spacing: 0.05em;
}

.sns-arrow {
  color: var(--text-dim);
  transition: all 0.3s var(--ease);
  flex-shrink: 0;
  display: flex;
}

.sns-card:hover .sns-arrow {
  color: var(--cyan);
  transform: translateX(4px);
}

/* ============================================
   ACCESS
   ============================================ */
.access-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.access-info {
  padding: 40px 36px;
}

.access-info h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 28px;
  color: var(--text-primary);
}

.access-dl {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 14px 16px;
  font-size: 0.85rem;
}

.access-dl dt {
  color: var(--cyan);
  font-weight: 600;
  font-size: 0.8rem;
}

.access-dt-icon {
  font-size: 0.5rem;
  opacity: 0.6;
}

.access-dl dd {
  color: var(--text-secondary);
  line-height: 1.7;
}

.access-info .btn {
  margin-top: 32px;
}

.access-map {
  min-height: 420px;
  padding: 4px;
}

.access-map iframe {
  display: block;
  border-radius: calc(var(--radius) - 4px);
  width: 100%;
  height: 100%;
  min-height: 412px;
  filter: brightness(0.95) contrast(1.05) saturate(0.8);
  transition: filter 0.4s;
}

.access-map:hover iframe {
  filter: brightness(1) contrast(1) saturate(1);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--glass-border);
  padding: 40px 0 24px;
  position: relative;
  z-index: 2;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-org {
  font-size: 0.65rem;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-dim);
  transition: all 0.3s var(--ease);
  display: flex;
}

.footer-links a:hover {
  color: var(--cyan);
  filter: drop-shadow(0 0 4px rgba(0, 240, 255, 0.4));
}

.footer-bottom { text-align: center; }

.footer-copy {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

/* stagger children */
.fade-in:nth-child(1) { transition-delay: 0s; }
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 960px) {
  .about-cards,
  .research-grid,
  .sns-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .access-map { min-height: 300px; }
  .access-map iframe { min-height: 292px; }

  .hero-stats { gap: 20px; }
}

@media (max-width: 640px) {
  .hamburger { display: flex; }

  .nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 6, 14, 0.96);
    backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 36px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--ease);
    z-index: 105;
  }

  .nav.open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    font-size: 1rem;
    color: var(--text-primary);
  }

  .section { padding: 80px 0; }
  .section-header { margin-bottom: 40px; }
  .header-inner { height: 60px; }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  .hero-stat-divider {
    width: 40px;
    height: 1px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

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

  .cursor-glow { display: none; }
}