/* ═══════════════════════════════════════════════════════════════════
   NUCLEOFLUX — LANDING PAGE STYLES
   Cyberpunk neon aesthetic matching the game
   ═══════════════════════════════════════════════════════════════════ */

:root {
  color-scheme: dark;
  --bg: #03040a;
  --bg-2: #080d1a;
  --neon: #18f2ff;
  --neon-dim: #0a7a82;
  --purple: #7c3cff;
  --hot: #ff5ea8;
  --orange: #ff8800;
  --green: #00ffa8;
  --text: #e4edff;
  --muted: #7a8bb0;
  --panel: rgba(6, 12, 28, 0.75);
  --panel-solid: rgba(8, 16, 36, 0.92);
  --border: rgba(24, 242, 255, 0.15);
  --border-bright: rgba(24, 242, 255, 0.35);
  --glow-sm: 0 0 15px rgba(24, 242, 255, 0.3);
  --glow-md: 0 0 30px rgba(24, 242, 255, 0.35), 0 0 60px rgba(24, 242, 255, 0.15);
  --glow-lg: 0 0 40px rgba(24, 242, 255, 0.4), 0 0 80px rgba(24, 242, 255, 0.2), 0 0 120px rgba(24, 242, 255, 0.1);
  --mono: "Share Tech Mono", "Courier New", monospace;
  --display: "Orbitron", system-ui, sans-serif;
  --ease: cubic-bezier(0.23, 1, 0.32, 1);
}

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

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Canvas background ── */
#space-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  width: 100%;
  height: 100%;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 5vw;
  background: linear-gradient(180deg, rgba(3,4,10,0.95) 0%, rgba(3,4,10,0) 100%);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(24,242,255,0.06);
}

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

.logo {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  box-shadow: var(--glow-sm);
}

.brand-text {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  background: linear-gradient(135deg, var(--neon), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.nav-links a { transition: color 0.3s; }
.nav-links a:hover { color: var(--neon); }

.nav-right { display: flex; align-items: center; gap: 16px; }

.lang-switch {
  display: flex;
  background: rgba(6,12,28,0.8);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s;
}

.lang-btn.active {
  color: var(--text);
  background: rgba(24,242,255,0.15);
  box-shadow: 0 0 12px rgba(24,242,255,0.25);
}

/* ── Buttons ── */
.btn {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid var(--border-bright);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.35s var(--ease);
  position: relative;
  overflow: hidden;
}

.btn-glow {
  background: linear-gradient(135deg, rgba(24,242,255,0.2), rgba(124,60,255,0.3));
  box-shadow: var(--glow-md);
  color: #fff;
}

.btn-glow:hover {
  box-shadow: var(--glow-lg);
  transform: translateY(-2px);
  border-color: rgba(24,242,255,0.6);
}

.btn-ghost {
  background: rgba(6,12,28,0.6);
  color: var(--muted);
}

.btn-ghost:hover {
  background: rgba(24,242,255,0.08);
  color: var(--text);
  border-color: rgba(24,242,255,0.3);
}

/* ── Main ── */
main {
  position: relative;
  z-index: 1;
  padding: 0 5vw;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 40px;
  padding-top: 80px;
}

.hero-badge {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: var(--neon);
  margin-bottom: 20px;
  text-shadow: 0 0 20px rgba(24,242,255,0.5);
}

.hero-title {
  font-family: var(--display);
  font-weight: 900;
  line-height: 0.95;
  margin-bottom: 28px;
}

.title-line {
  display: block;
  font-size: clamp(3.5rem, 8vw, 7rem);
  letter-spacing: 0.05em;
  color: #fff;
}

.title-line.accent {
  background: linear-gradient(135deg, var(--neon) 0%, var(--purple) 50%, var(--hot) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px rgba(24,242,255,0.4));
}

.hero-desc {
  color: var(--muted);
  font-size: 1rem;
  max-width: 520px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

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

.stat-num {
  font-family: var(--display);
  font-weight: 800;
  font-size: 2rem;
  color: var(--neon);
  text-shadow: 0 0 20px rgba(24,242,255,0.5);
}

.stat-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--muted);
}

/* Reactor animation in hero */
.hero-reactor {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 500px;
  justify-self: center;
}

/* ── Sections ── */
.section {
  padding: 100px 0;
  display: flex;
  flex-direction: column;
  gap: 48px;
  border-top: 1px solid rgba(24,242,255,0.06);
}

.section-header {
  max-width: 700px;
}

.section-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: var(--purple);
  margin-bottom: 12px;
}

.section-header h2 {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  letter-spacing: 0.04em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-sub {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── How to play ── */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.how-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.4s var(--ease);
}

.how-card:hover {
  border-color: var(--border-bright);
  box-shadow: var(--glow-sm);
  transform: translateY(-4px);
}

.how-icon {
  width: 48px;
  height: 48px;
  color: var(--neon);
  filter: drop-shadow(0 0 8px rgba(24,242,255,0.5));
}

.how-card h3 {
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.how-card p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

/* ── Features ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), var(--purple), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

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

.feature-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.feature-num {
  font-family: var(--display);
  font-weight: 900;
  font-size: 2rem;
  color: rgba(24,242,255,0.12);
  line-height: 1;
}

.feature-card h3 {
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.feature-card p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.7;
}

/* ── Game modes ── */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mode-card {
  background: var(--panel-solid);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.4s var(--ease);
  position: relative;
}

.mode-card.featured {
  border-color: rgba(124,60,255,0.5);
  box-shadow: 0 0 40px rgba(124,60,255,0.15), inset 0 0 40px rgba(124,60,255,0.05);
}

.mode-badge {
  position: absolute;
  top: -1px;
  right: 24px;
  background: linear-gradient(135deg, var(--purple), var(--hot));
  color: #fff;
  font-family: var(--display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  padding: 6px 14px;
  border-radius: 0 0 10px 10px;
}

.mode-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--neon);
  box-shadow: var(--glow-sm);
  position: relative;
}

.mode-icon::after {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  border: 1px solid rgba(24,242,255,0.3);
}

.mode-classic::before { content: '80'; position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--display); font-size: 0.75rem; font-weight: 800; color: var(--neon); }
.mode-infinite::before { content: '\221E'; position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--display); font-size: 1.4rem; font-weight: 800; color: var(--neon); }
.mode-daily::before { content: '24h'; position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--display); font-size: 0.65rem; font-weight: 800; color: var(--neon); }

.mode-card h3 {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
}

.mode-card p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.7;
  flex: 1;
}

.mode-detail {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--neon);
}

.mode-detail small {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--muted);
  margin-left: 4px;
}

/* ── Worlds ── */
.worlds-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.world-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

.world-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--wc, var(--neon));
  box-shadow: 0 0 20px var(--wc, var(--neon));
  opacity: 0.6;
  transition: opacity 0.3s;
}

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

.world-card:hover {
  border-color: color-mix(in srgb, var(--wc, var(--neon)) 40%, transparent);
  box-shadow: 0 0 30px color-mix(in srgb, var(--wc, var(--neon)) 20%, transparent);
  transform: translateY(-3px);
}

.world-num {
  font-family: var(--display);
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--wc, var(--neon));
  opacity: 0.3;
  line-height: 1;
}

.world-card h4 {
  font-family: var(--display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.world-card p {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* ── Bosses ── */
.boss-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.boss-card {
  background: var(--panel-solid);
  border: 1px solid rgba(255,94,168,0.2);
  border-radius: 20px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.4s var(--ease);
}

.boss-card:hover {
  border-color: rgba(255,94,168,0.45);
  box-shadow: 0 0 40px rgba(255,94,168,0.1);
  transform: translateY(-3px);
}

.boss-shape {
  width: 48px;
  height: 48px;
  border: 2px solid var(--hot);
  box-shadow: 0 0 20px rgba(255,94,168,0.3);
  position: relative;
}

.boss-sentinel { border-radius: 50%; }
.boss-specter { border-radius: 50%; border-style: dashed; }
.boss-swarm { border-radius: 50%; border-style: dotted; border-color: #AA00FF; box-shadow: 0 0 20px rgba(170,0,255,0.3); }
.boss-fortress { border-radius: 6px; border-color: #FF2200; box-shadow: 0 0 20px rgba(255,34,0,0.3); }
.boss-nexus { border-radius: 12px; border-color: #00FFAA; box-shadow: 0 0 20px rgba(0,255,170,0.3); }
.boss-pulsar { border-radius: 50%; border-color: #00AAFF; box-shadow: 0 0 20px rgba(0,170,255,0.3), 0 0 40px rgba(0,170,255,0.15); }
.boss-shadow { border-radius: 50%; border-style: dashed; border-color: #8844CC; box-shadow: 0 0 20px rgba(136,68,204,0.3); opacity: 0.8; }
.boss-singularity { border-radius: 50%; background: radial-gradient(circle, rgba(255,94,168,0.2) 0%, transparent 70%); }

.boss-wave {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--hot);
  opacity: 0.6;
}

.boss-card h3 {
  font-family: var(--display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--hot);
}

.boss-card > p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

.boss-phases {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 14px;
  border-top: 1px solid rgba(255,94,168,0.15);
}

.boss-phases span {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding: 6px 12px;
  border: 1px solid rgba(255,94,168,0.2);
  border-radius: 999px;
}

/* ── Synergies ── */
.synergy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.synergy-card {
  background: var(--panel);
  border: 1px solid color-mix(in srgb, var(--sc, var(--purple)) 30%, transparent);
  border-radius: 16px;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}

.synergy-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--sc, var(--purple));
  box-shadow: 0 0 15px var(--sc, var(--purple));
  opacity: 0.5;
  transition: opacity 0.3s;
}

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

.synergy-card:hover {
  box-shadow: 0 0 30px color-mix(in srgb, var(--sc, var(--purple)) 15%, transparent);
  transform: translateY(-2px);
}

.synergy-card h4 {
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--sc, var(--purple));
  letter-spacing: 0.04em;
}

.synergy-card p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* ── Soundtrack ── */
.audio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.audio-card {
  background: var(--panel-solid);
  border: 1px solid rgba(124,60,255,0.25);
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.3s var(--ease);
}

.audio-card:hover {
  border-color: rgba(124,60,255,0.5);
  box-shadow: 0 0 30px rgba(124,60,255,0.12);
}

.audio-viz {
  height: 48px;
  background: linear-gradient(90deg,
    rgba(24,242,255,0.05) 0%,
    rgba(124,60,255,0.1) 30%,
    rgba(255,94,168,0.1) 60%,
    rgba(24,242,255,0.05) 100%
  );
  border-radius: 10px;
  position: relative;
  overflow: hidden;
}

.audio-viz::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg,
    rgba(24,242,255,0.15) 0px, rgba(24,242,255,0.15) 2px,
    transparent 2px, transparent 8px
  );
  animation: vizScroll 3s linear infinite;
}

@keyframes vizScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-48px); }
}

.audio-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.audio-title {
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.audio-desc {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

audio {
  width: 100%;
  height: 32px;
  filter: hue-rotate(180deg) saturate(1.5) brightness(0.7);
  opacity: 0.8;
}

audio::-webkit-media-controls-panel {
  background: var(--panel);
}

/* ── Controls ── */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.control-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
  align-items: center;
  transition: all 0.4s var(--ease);
}

.control-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.control-icon {
  font-size: 2.4rem;
  filter: grayscale(1) brightness(2);
}

.control-card h3 {
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.control-card p {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.7;
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  padding: 40px 5vw;
  border-top: 1px solid rgba(24,242,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
}

.footer-logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  opacity: 0.7;
}

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

/* ── Requirements ── */
.req-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.req-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.4s var(--ease);
}

.req-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
}

.req-icon {
  font-size: 2rem;
  filter: grayscale(1) brightness(2);
}

.req-card h3 {
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.req-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.req-card li {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.5;
  padding-left: 16px;
  position: relative;
}

.req-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon);
  opacity: 0.4;
}

/* ── Author ── */
.author-card {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--panel-solid);
  border: 1px solid rgba(124,60,255,0.25);
  border-radius: 24px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}

.author-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--purple), var(--hot), transparent);
}

.author-photo {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--purple);
  box-shadow: 0 0 30px rgba(124,60,255,0.3), 0 0 60px rgba(124,60,255,0.15);
}

.author-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-info {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.author-role {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  color: var(--purple);
}

.author-name {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, var(--hot), var(--purple), var(--neon));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.author-bio {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 500px;
}

.author-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 8px;
}

.author-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--muted);
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: all 0.3s var(--ease);
}

.author-link:hover {
  color: var(--neon);
  border-color: var(--border-bright);
  box-shadow: var(--glow-sm);
}

.author-link-icon {
  font-size: 1rem;
}

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

.footer-links a {
  color: var(--muted);
  font-size: 0.75rem;
  transition: color 0.3s;
}

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

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */

@media (max-width: 1100px) {
  .features-grid, .synergy-grid, .audio-grid, .controls-grid, .req-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .worlds-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .boss-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 120px;
    padding-bottom: 40px;
  }
  .hero-reactor {
    max-width: 320px;
    order: -1;
  }
  .nav-links { display: none; }
  .modes-grid {
    grid-template-columns: 1fr;
  }
  .boss-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .author-card {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  .author-bio { max-width: 100%; }
  .author-links { justify-content: center; }
  .how-grid {
    grid-template-columns: 1fr;
  }
  .worlds-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid, .synergy-grid, .audio-grid, .controls-grid, .req-grid, .boss-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    flex-direction: column;
  }
  .btn { width: 100%; justify-content: center; }
  .hero-stats {
    justify-content: center;
  }
  main { padding: 0 4vw; }
  .nav { padding: 12px 4vw; }
}