@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;600;700&display=swap');

/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg-dark:      #030712;
  --bg-card:      rgba(15, 23, 42, 0.9);
  --neon-cyan:    #00f2ff;
  --neon-pink:    #ff007f;
  --neon-amber:   #ffaa00;
  --text:         #f9fafb;
  --text-muted:   #94a3b8;
  --border:       rgba(0, 242, 255, 0.18);
  --border-hover: rgba(255, 0, 127, 0.6);
  --font-body:    'Space Grotesk', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --transition:   0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --radius:       12px;
  --radius-lg:    20px;
  --glow-cyan:    0 0 20px rgba(0, 242, 255, 0.4), 0 0 40px rgba(0, 242, 255, 0.15);
  --glow-pink:    0 0 20px rgba(255, 0, 127, 0.5), 0 0 40px rgba(255, 0, 127, 0.2);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(circle, rgba(0, 242, 255, 0.18) 1px, transparent 1px),
    linear-gradient(rgba(0, 242, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 242, 255, 0.035) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px, 40px 40px;
}

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

/* ── Navigation ─────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
  height: 64px;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-logo-img {
  height: 28px;
  width: auto;
  display: block;
  animation: imgGlowPulse 3s ease-in-out infinite;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--neon-cyan);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--neon-cyan);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* ── Language Toggle ─────────────────────────────────────── */
.lang-toggle {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.lang-btn {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition);
}

.lang-btn.active {
  background: var(--neon-cyan);
  color: var(--bg-dark);
}

.lang-btn:hover:not(.active) {
  color: var(--neon-cyan);
}

/* ── Anim Toggle ─────────────────────────────────────────── */
.anim-toggle {
  display: flex;
  gap: 2px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.anim-btn {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--transition);
}

.anim-btn.active {
  background: var(--neon-cyan);
  color: var(--bg-dark);
}

.anim-btn:hover:not(.active) {
  color: var(--neon-cyan);
}

/* ── Layout ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
}

.section {
  padding: 5rem 0;
}

.section + .section {
  border-top: 1px solid var(--border);
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(4rem, 10vw, 8rem) clamp(1rem, 4vw, 2.5rem) clamp(3rem, 7vw, 6rem);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0, 242, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--neon-cyan);
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.1s;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.2s;
}

.hero-title .accent {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.35s;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.5s;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--neon-cyan);
  color: var(--bg-dark);
  border-color: var(--neon-cyan);
  box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
  background: var(--neon-pink);
  border-color: var(--neon-pink);
  box-shadow: var(--glow-pink);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--neon-cyan);
  border-color: rgba(0, 242, 255, 0.4);
}

.btn-outline:hover {
  border-color: var(--neon-pink);
  color: var(--neon-pink);
  box-shadow: var(--glow-pink);
  transform: translateY(-2px);
}

.btn-steam {
  background: #1b2838;
  color: #c7d5e0;
  border-color: #4c6b8a;
  gap: 0.5em;
}

.btn-steam:hover {
  background: #2a475e;
  border-color: #66c0f4;
  color: #fff;
  box-shadow: 0 0 12px rgba(102, 192, 244, 0.4);
  transform: translateY(-2px);
}

/* ── Section Headers ─────────────────────────────────────── */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--neon-cyan);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  min-width: 0;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--glow-pink);
  transform: translateY(-3px);
}

/* ── Phase Cards ─────────────────────────────────────────── */
.phase-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  cursor: pointer;
  text-decoration: none;
}

.phase-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.phase-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(0, 242, 255, 0.3));
  flex-shrink: 0;
}

.phase-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--neon-cyan);
  opacity: 0.7;
}

.phase-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.phase-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Difficulty Stars ────────────────────────────────────── */
.difficulty {
  display: flex;
  gap: 3px;
  margin-top: auto;
  padding-top: 0.5rem;
}

.star {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.3;
  transition: opacity var(--transition);
}

.star.filled {
  color: var(--neon-amber);
  opacity: 1;
  text-shadow: 0 0 8px rgba(255, 170, 0, 0.5);
}

/* ── Feature Cards ───────────────────────────────────────── */
.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-icon {
  font-size: 1.75rem;
  line-height: 1;
}

.feature-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Grid Layouts ────────────────────────────────────────── */
.grid {
  display: grid;
  gap: 1.25rem;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

/* ── Horizontal Scroll (mini phase list) ────────────────── */
.phases-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  scrollbar-width: thin;
  scrollbar-color: var(--neon-cyan) transparent;
}

.phases-scroll::-webkit-scrollbar { height: 4px; }
.phases-scroll::-webkit-scrollbar-track { background: transparent; }
.phases-scroll::-webkit-scrollbar-thumb { background: var(--neon-cyan); border-radius: 2px; }

.mini-phase-card {
  flex: 0 0 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  text-align: center;
}

.mini-phase-card img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  filter: drop-shadow(0 0 6px rgba(0, 242, 255, 0.25));
}

.mini-phase-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--neon-cyan);
  opacity: 0.7;
}

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

/* ── Page Header ─────────────────────────────────────────── */
.page-header {
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(0, 242, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.page-title {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
}

.page-title .accent { color: var(--neon-cyan); text-shadow: var(--glow-cyan); }

/* ── Phase Detail ────────────────────────────────────────── */
.phase-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 3rem;
}

.phase-detail-icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
  filter: drop-shadow(0 0 16px rgba(0, 242, 255, 0.4));
  flex-shrink: 0;
}

.phase-detail-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.phase-detail-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--neon-cyan);
}

.phase-detail-name {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
}

.phase-detail-lore {
  font-size: 0.9rem;
  color: var(--neon-amber);
  font-style: italic;
  opacity: 0.85;
}

/* ── Tips List ───────────────────────────────────────────── */
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.tip-item::before {
  content: '▸';
  color: var(--neon-cyan);
  flex-shrink: 0;
  margin-top: 0.05em;
}


/* ── Phase Nav ───────────────────────────────────────────── */
.phase-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.phase-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.phase-nav-btn:hover {
  color: var(--neon-cyan);
  border-color: rgba(0, 242, 255, 0.4);
  box-shadow: 0 0 12px rgba(0, 242, 255, 0.15);
}

.phase-nav-btn .arrow { font-family: var(--font-mono); font-size: 1rem; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* ── Scroll Fade-In ──────────────────────────────────────── */
body[data-anim="subtle"] {
  --anim-dist: 10px;
  --anim-dur:  0.4s;
}

body[data-anim="expressive"] {
  --anim-dist: 24px;
  --anim-dur:  0.7s;
}

.fade-in {
  opacity: 0;
  transform: translateY(var(--anim-dist, 24px));
  transition: opacity var(--anim-dur, 0.7s) ease, transform var(--anim-dur, 0.7s) ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Animations ──────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes glowPulse {
  0%, 100% { text-shadow: 0 0 12px rgba(0, 242, 255, 0.6); }
  50%       { text-shadow: 0 0 24px rgba(0, 242, 255, 0.9), 0 0 48px rgba(0, 242, 255, 0.4); }
}

@keyframes imgGlowPulse {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(0, 242, 255, 0.6)); }
  50%       { filter: drop-shadow(0 0 18px rgba(0, 242, 255, 0.9)) drop-shadow(0 0 36px rgba(0, 242, 255, 0.35)); }
}

.glow-pulse { animation: glowPulse 3s ease-in-out infinite; }

/* ── Index-only styles ──────────────────────────────────── */
.what-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 2.5rem;
}
.what-text { display: flex; flex-direction: column; gap: 1.25rem; }
.what-body { font-size: 1rem; color: var(--text-muted); line-height: 1.75; }
.what-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  backdrop-filter: blur(10px);
}
.stat-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
  line-height: 1;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  letter-spacing: 0.05em;
}
.features-grid { margin-top: 2.5rem; }

/* ── Hero Slideshow ─────────────────────────────────── */
.hero-slideshow {
  position: relative;
  width: 100%;
  max-width: 680px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.6s ease forwards 0.2s;
  box-shadow: 0 0 40px rgba(0, 242, 255, 0.1);
}

.slideshow-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.slideshow-track img {
  width: 100%;
  flex-shrink: 0;
  object-fit: cover;
  aspect-ratio: 16/9;
  display: block;
}

.slideshow-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(3, 7, 18, 0.75);
  border: 1px solid var(--border);
  color: var(--neon-cyan);
  font-size: 1.5rem;
  line-height: 1;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  transition: border-color var(--transition), box-shadow var(--transition);
  z-index: 2;
}

.slideshow-btn:hover {
  border-color: rgba(0, 242, 255, 0.6);
  box-shadow: var(--glow-cyan);
}

.slideshow-prev { left: 0.6rem; }
.slideshow-next { right: 0.6rem; }

.slideshow-dots {
  position: absolute;
  bottom: 0.6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 2;
}

.slideshow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}

.slideshow-dot.active {
  background: var(--neon-cyan);
  transform: scale(1.4);
  box-shadow: 0 0 6px rgba(0, 242, 255, 0.7);
}

.what-video {
  display: flex;
  align-items: center;
}

.trailer-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-dark);
}

.phases-section-actions {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

/* ── Hamburger / Nav Overlay ────────────────────────────── */
.nav-toggle-input {
  display: none;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: background var(--transition);
  flex-shrink: 0;
}

.nav-hamburger:hover {
  background: rgba(255, 255, 255, 0.05);
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--neon-cyan);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

/* input は <body> の最初の子、nav はその直後の兄弟 → ~ で参照可能 */
.nav-toggle-input:checked ~ nav .nav-hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle-input:checked ~ nav .nav-hamburger span:nth-child(2) {
  opacity: 0;
}
.nav-toggle-input:checked ~ nav .nav-hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 101;
  background: rgba(3, 7, 18, 0.97);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav-toggle-input:checked ~ .nav-overlay {
  opacity: 1;
  visibility: visible;
}

.nav-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.nav-overlay-inner .lang-toggle {
  margin-top: 1rem;
}

.nav-overlay-inner a {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--transition), text-shadow var(--transition);
}

.nav-overlay-inner a:hover {
  color: var(--neon-cyan);
  text-shadow: var(--glow-cyan);
}

.nav-overlay-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-size: 1.25rem;
  color: var(--text-muted);
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.nav-overlay-close:hover {
  color: var(--neon-cyan);
  background: rgba(0, 242, 255, 0.08);
  border-color: rgba(0, 242, 255, 0.4);
}

body:has(.nav-toggle-input:checked) {
  overflow: hidden;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav .lang-toggle { display: none; }
  .nav .anim-toggle { display: none; }
  .nav-hamburger { display: flex; }

  .section { padding: 3rem 0; }

  .what-grid { grid-template-columns: 1fr; gap: 2rem; }
  .what-stats { display: none; }
}

@media (max-width: 640px) {
  .grid-3,
  .grid-2 { grid-template-columns: 1fr; }

  .section-desc { max-width: 100%; }

  .phase-detail-header { flex-direction: column; gap: 1rem; }

  .phase-nav { flex-direction: column; }

  footer { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 400px) {
  .what-stats { grid-template-columns: 1fr; }
}

/* ── SYSTEM Terminal ───────────────────────────────── */
.terminal-label {
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.1em;
}

.terminal-output {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  color: #a0ffcc;
  margin: 0;
}

.terminal-card.corrupted .terminal-output {
  animation: glitch 3s infinite;
}

.terminal-card.critical .terminal-output {
  animation: glitch 1.2s infinite;
}

@keyframes glitch {
  0%, 90%  { transform: none; opacity: 1; color: #a0ffcc; text-shadow: none; }
  91%      { transform: skewX(-3deg); color: #ff0066; text-shadow: 2px 0 #ff0066; }
  93%      { transform: skewX(1deg); color: #a0ffcc; text-shadow: none; opacity: 0.7; }
  95%      { transform: skewX(-1deg); color: #ff0066; text-shadow: -2px 0 #ff0066; }
  100%     { transform: none; opacity: 1; color: #a0ffcc; text-shadow: none; }
}