/* KuroNova - Dark Mode Neon Anime Aesthetic */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a26;
  --bg-card-hover: #222233;
  --fg-primary: #f0f0f5;
  --fg-secondary: #8888aa;
  --fg-muted: #555570;
  --neon-purple: #b44aff;
  --neon-pink: #ff2d8a;
  --neon-cyan: #00e5ff;
  --neon-blue: #4d6bff;
  --gradient-main: linear-gradient(135deg, #b44aff 0%, #ff2d8a 50%, #00e5ff 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(180,74,255,0.15) 0%, rgba(255,45,138,0.08) 100%);
  --glow-purple: 0 0 30px rgba(180,74,255,0.3);
  --glow-pink: 0 0 30px rgba(255,45,138,0.3);
  --border-subtle: 1px solid rgba(255,255,255,0.06);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Outfit', sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg-primary);
  color: var(--fg-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === NAV === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(20px);
  border-bottom: var(--border-subtle);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-tag {
  font-size: 0.75rem;
  color: var(--fg-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-display);
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -25%;
  width: 150%;
  height: 150%;
  background: radial-gradient(ellipse at 30% 50%, rgba(180,74,255,0.12) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(255,45,138,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 50% 80%, rgba(0,229,255,0.06) 0%, transparent 50%);
  animation: pulse-glow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes pulse-glow {
  0% { opacity: 0.6; transform: scale(1); }
  100% { opacity: 1; transform: scale(1.05); }
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neon-cyan);
  border: 1px solid rgba(0,229,255,0.25);
  background: rgba(0,229,255,0.06);
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero h1 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--fg-secondary);
  max-width: 540px;
  margin-top: 1.5rem;
  position: relative;
  z-index: 1;
  font-weight: 300;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  margin-top: 3.5rem;
  position: relative;
  z-index: 1;
}

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

.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
  font-family: var(--font-display);
}

/* === DIVIDER === */
.section-divider {
  width: 60px;
  height: 2px;
  background: var(--gradient-main);
  margin: 0 auto;
  border-radius: 2px;
}

/* === CATEGORIES === */
.categories {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--neon-purple);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--fg-secondary);
  max-width: 560px;
  margin-bottom: 3rem;
  font-weight: 300;
}

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.cat-card {
  background: var(--bg-card);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-main);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cat-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--glow-purple);
}

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

.cat-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  display: block;
}

.cat-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

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

/* === FEATURES === */
.features {
  padding: 6rem 2rem;
  background: var(--bg-secondary);
}

.features-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feat-card {
  padding: 2.5rem;
  border-radius: var(--radius-md);
  border: var(--border-subtle);
  background: var(--bg-primary);
  position: relative;
  transition: all 0.3s ease;
}

.feat-card:hover {
  border-color: rgba(180,74,255,0.2);
  box-shadow: var(--glow-purple);
}

.feat-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 1rem;
}

.feat-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.feat-desc {
  color: var(--fg-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* === MYSTERY === */
.mystery {
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.mystery::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at center, rgba(255,45,138,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.mystery-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.mystery-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
}

.mystery h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.mystery p {
  font-size: 1.1rem;
  color: var(--fg-secondary);
  font-weight: 300;
  line-height: 1.7;
  max-width: 520px;
  margin: 0 auto;
}

.mystery-tiers {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.mystery-tier {
  background: var(--bg-card);
  border: var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem 2rem;
  min-width: 160px;
  transition: all 0.3s ease;
}

.mystery-tier:hover {
  transform: translateY(-3px);
  box-shadow: var(--glow-pink);
}

.tier-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.tier-range {
  font-size: 0.85rem;
  color: var(--neon-pink);
}

/* === CLOSING === */
.closing {
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
}

.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.closing h2 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.closing p {
  font-size: 1.15rem;
  color: var(--fg-secondary);
  font-weight: 300;
  line-height: 1.7;
}

/* === FOOTER === */
.footer {
  padding: 3rem 2rem;
  border-top: var(--border-subtle);
  text-align: center;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.footer p {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav {
    padding: 1rem 1.25rem;
  }

  .hero {
    padding: 7rem 1.5rem 4rem;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat-value {
    font-size: 1.35rem;
  }

  .categories,
  .features,
  .mystery,
  .closing {
    padding: 4rem 1.5rem;
  }

  .cat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .cat-card {
    padding: 1.25rem 1rem;
  }

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

  .mystery-tiers {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .cat-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
}