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

:root {
  --bg: #E0E7FF;
  --bg-dark: #1E1B4B;
  --text: #1F2937;
  --text-muted: #6B7280;
  --indigo: #4F46E5;
  --indigo-light: #818CF8;
  --indigo-dark: #3730A3;
  --green: #10B981;
  --green-light: #86EFAC;
  --blue-light: #93C5FD;
  --red-light: #FCA5A5;
  --white-glass: rgba(255, 255, 255, 0.85);
  --white-glass-border: rgba(255, 255, 255, 0.5);
  --radius: 16px;
  --radius-sm: 8px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

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

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── Animated Grid Background ────────────────────────────────────────────── */
#gridBg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.12;
}

/* ── Navigation ──────────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(224, 231, 255, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 18px;
  color: var(--indigo);
}

.nav-logo-icon { font-size: 24px; }

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  max-width: 1100px;
  margin: 0 auto;
  gap: 60px;
}

.hero-content { flex: 1; max-width: 520px; }

.hero-badge {
  display: inline-block;
  background: var(--indigo);
  color: white;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero-title { margin-bottom: 20px; }

.hero-title-grid {
  display: inline-flex;
  gap: 4px;
}

.letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: var(--white-glass);
  border: 1px solid var(--white-glass-border);
  border-radius: 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  animation: letterPop 0.4s ease-out backwards;
  animation-delay: calc(var(--i) * 0.06s);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.1);
}

@keyframes letterPop {
  from { opacity: 0; transform: scale(0.5) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--indigo);
  color: white;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
  background: var(--indigo-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
  background: var(--white-glass);
  color: var(--text);
  border: 1px solid var(--white-glass-border);
}

.btn-secondary:hover {
  background: white;
  transform: translateY(-1px);
}

.hero-coming-soon {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

/* Phone mockup */
.hero-visual { flex-shrink: 0; }

.phone-mockup {
  width: 280px;
  height: 560px;
  background: #1a1a2e;
  border-radius: 36px;
  padding: 12px;
  box-shadow:
    0 20px 60px rgba(79, 70, 229, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  transform: perspective(800px) rotateY(-5deg) rotateX(2deg);
  transition: transform 0.4s;
}

.phone-mockup:hover {
  transform: perspective(800px) rotateY(0deg) rotateX(0deg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg);
  border-radius: 26px;
  overflow: hidden;
  padding: 16px 10px;
}

.mock-header {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  color: var(--text);
  padding: 8px 4px 12px;
  font-family: 'JetBrains Mono', monospace;
}

.mock-cells {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  margin-bottom: 12px;
}

.mock-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  color: #C7CBD1;
}

.mock-cell.highlight {
  color: var(--text);
  background: rgba(134, 239, 172, 0.3);
}

.mock-words {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 8px 0;
}

.mock-word {
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 8px;
  color: var(--text);
}

.mock-word.found {
  text-decoration: line-through;
  color: var(--green);
  background: rgba(16, 185, 129, 0.1);
}

/* ── Features ────────────────────────────────────────────────────────────── */
.features {
  position: relative;
  z-index: 1;
  padding: 100px 24px;
}

.section-title {
  text-align: center;
  font-size: 36px;
  font-weight: 900;
  color: var(--text);
  margin-bottom: 60px;
  letter-spacing: -0.5px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white-glass);
  border: 1px solid var(--white-glass-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(79, 70, 229, 0.12);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Modes ───────────────────────────────────────────────────────────────── */
.modes {
  position: relative;
  z-index: 1;
  padding: 100px 24px;
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.mode-card {
  border-radius: var(--radius);
  padding: 40px 28px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: transform 0.2s;
}

.mode-card:hover { transform: translateY(-4px); }

.mode-traditional { background: linear-gradient(135deg, #86EFAC, #4ADE80); }
.mode-adaptive { background: linear-gradient(135deg, #93C5FD, #60A5FA); }
.mode-competitive { background: linear-gradient(135deg, #FCA5A5, #F87171); }

.mode-emoji { font-size: 48px; margin-bottom: 16px; }

.mode-card h3 {
  font-size: 24px;
  font-weight: 900;
  color: white;
  margin-bottom: 4px;
}

.mode-tagline {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 16px;
}

.mode-card p:last-child {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}

/* ── CTA ─────────────────────────────────────────────────────────────────── */
.cta {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 100px 24px;
}

.cta h2 {
  font-size: 40px;
  font-weight: 900;
  margin-bottom: 16px;
}

.cta p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  background: var(--bg-dark);
  color: white;
  padding: 60px 24px 32px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand { margin-bottom: 40px; }
.footer-brand .nav-logo-icon { color: #EF4444; }
.footer-brand .nav-logo-text { color: white; font-weight: 800; font-size: 18px; }

.footer-tagline {
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  margin-top: 8px;
}

.footer-links {
  display: flex;
  gap: 80px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover { color: white; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}

/* ── Legal Pages ─────────────────────────────────────────────────────────── */
.legal-page {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.legal-card {
  background: var(--white-glass);
  border: 1px solid var(--white-glass-border);
  border-radius: var(--radius);
  padding: 40px;
}

.legal-card h1 {
  font-size: 32px;
  font-weight: 900;
  color: var(--text);
  margin-bottom: 8px;
}

.legal-card .last-updated {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.legal-card .intro {
  font-size: 15px;
  color: #374151;
  line-height: 1.7;
  margin-bottom: 32px;
}

.legal-card h2 {
  font-size: 18px;
  font-weight: 800;
  color: var(--indigo);
  margin-top: 32px;
  margin-bottom: 12px;
}

.legal-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-top: 16px;
  margin-bottom: 6px;
}

.legal-card p {
  font-size: 14px;
  color: #374151;
  line-height: 1.7;
  margin-bottom: 10px;
}

.legal-card ul {
  list-style: none;
  padding: 0;
  margin-bottom: 12px;
}

.legal-card li {
  font-size: 14px;
  color: #374151;
  line-height: 1.7;
  padding-left: 20px;
  position: relative;
  margin-bottom: 4px;
}

.legal-card li::before {
  content: '•';
  color: var(--indigo);
  position: absolute;
  left: 4px;
  font-weight: 700;
}

.legal-card .contact-box {
  background: rgba(79, 70, 229, 0.06);
  border: 1px solid rgba(79, 70, 229, 0.12);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-top: 8px;
}

.legal-card .contact-box li::before { color: var(--indigo); }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 100px;
    gap: 40px;
  }
  .hero-content { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-title-grid { justify-content: center; }
  .letter { width: 38px; height: 38px; font-size: 20px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .modes-grid { grid-template-columns: 1fr; max-width: 400px; }
  .footer-links { flex-direction: column; gap: 32px; }
  .phone-mockup { transform: none; }
  .phone-mockup:hover { transform: none; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; }
  .letter { width: 32px; height: 32px; font-size: 17px; }
  .legal-card { padding: 24px; }
  .legal-card h1 { font-size: 24px; }
}