/* ─── Cinder Landing Page ─── */
/* Northwestern Purple (#4E2A84) branding, dark glassmorphism */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --purple-deep: #4E2A84;
  --purple-mid: #6B3FA0;
  --purple-light: #9B72CF;
  --purple-glow: rgba(78, 42, 132, 0.35);
  --bg-primary: #0A0A0C;
  --bg-card: #141418;
  --bg-elevated: #1C1C22;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --text-primary: #F4F4F5;
  --text-secondary: #A1A1AA;
  --text-tertiary: #71717A;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--purple-light);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #c4a0e8;
}

/* ─── Navigation ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ─── Hero ─── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 24px 60px;
  position: relative;
  overflow: hidden;
}

.hero-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  margin-bottom: 24px;
  box-shadow: 0 4px 20px var(--purple-glow);
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--purple-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--purple-light);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--purple-light), #c084fc, var(--purple-mid));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--purple-deep), var(--purple-mid));
  color: #fff;
  box-shadow: 0 4px 24px var(--purple-glow);
}

.btn-primary:hover {
  box-shadow: 0 8px 32px var(--purple-glow);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

/* ─── Features ─── */
.features {
  padding: 60px 24px 100px;
  max-width: 1100px;
  margin: 0 auto;
}

.features-header {
  text-align: center;
  margin-bottom: 64px;
}

.features-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.features-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.3s, transform 0.3s;
}

.feature-card:hover {
  border-color: rgba(155, 114, 207, 0.3);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--purple-deep), var(--purple-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.6;
}

/* ─── Footer ─── */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 48px 32px;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

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

.footer-copy {
  color: var(--text-tertiary);
  font-size: 0.8rem;
}

/* ─── Legal Pages ─── */
.legal {
  max-width: 720px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.legal h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.legal .last-updated {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  margin-bottom: 40px;
}

.legal h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--purple-light);
}

.legal p,
.legal ul {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.legal ul {
  padding-left: 24px;
}

.legal li {
  margin-bottom: 8px;
}

/* ─── Contact Page ─── */
.contact {
  max-width: 600px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.contact h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact .subtitle {
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-size: 1rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--purple-mid);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-success {
  display: none;
  padding: 16px 20px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 12px;
  color: #4ade80;
  font-size: 0.95rem;
  margin-top: 16px;
}

.form-success.show {
  display: block;
}

/* ─── Responsive ─── */
@media (max-width: 640px) {
  .nav {
    padding: 12px 16px;
  }
  .nav-links {
    gap: 16px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .footer-links {
    gap: 16px;
  }
}