@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Design tokens ── */
:root {
  --background:       #f5f8ff;
  --foreground:       #0c1730;
  --card:             #ffffff;
  --card-foreground:  #0c1730;
  --primary:          #0284c7;
  --primary-dark:     #0369a1;
  --primary-fg:       #ffffff;
  --secondary:        #eaf3fb;
  --muted:            #eaf3fb;
  --muted-fg:         #4a6880;
  --border:           #c9dff0;
  --radius:           0.625rem;
}

.dark {
  --background:       #0c1730;
  --foreground:       #eef4fc;
  --card:             #111f3a;
  --card-foreground:  #eef4fc;
  --primary:          #0284c7;
  --primary-dark:     #38bdf8;
  --primary-fg:       #ffffff;
  --secondary:        #172844;
  --muted:            #172844;
  --muted-fg:         #6a9bbf;
  --border:           #1a3355;
}

/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s, color 0.2s;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--background) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--foreground);
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}
.nav-brand:hover { text-decoration: none; color: var(--foreground); }

.brand-badge {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--muted-fg);
  font-weight: 500;
  transition: color 0.15s;
  text-decoration: none;
}
.nav-link:hover { color: var(--foreground); text-decoration: none; }

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--secondary);
  color: var(--muted-fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
  flex-shrink: 0;
}
.theme-btn:hover { background: var(--muted); color: var(--foreground); }
.theme-btn svg { width: 16px; height: 16px; }

/* ── Hero ── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 24px 80px;
  text-align: center;
}

.hero-glow {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background: radial-gradient(ellipse at center, color-mix(in srgb, var(--primary) 18%, transparent) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero-heading {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--foreground);
}

.hero-accent {
  color: var(--primary);
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--muted-fg);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
  text-decoration: none;
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--primary) 35%, transparent);
  transform: translateY(-1px);
  text-decoration: none;
  color: #fff;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--foreground);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
}
.btn-ghost:hover {
  background: var(--secondary);
  border-color: var(--primary);
  text-decoration: none;
  color: var(--foreground);
}

/* ── Sections ── */
.section {
  padding: 80px 24px;
}

.section-alt {
  background: var(--secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 10px;
}

.section-heading {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--foreground);
  margin: 0 0 16px;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--muted-fg);
  max-width: 600px;
  margin: 0 0 48px;
  line-height: 1.7;
}

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

.pillar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
  transition: box-shadow 0.15s, transform 0.15s;
}
.pillar:hover {
  box-shadow: 0 4px 20px color-mix(in srgb, var(--primary) 10%, transparent);
  transform: translateY(-2px);
}

.pillar-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.pillar-icon svg { width: 22px; height: 22px; }

.pillar h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 0 0 8px;
}

.pillar p {
  font-size: 0.9375rem;
  color: var(--muted-fg);
  margin: 0;
  line-height: 1.6;
}

/* ── Apps grid ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.app-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: box-shadow 0.15s, transform 0.15s;
}
.app-card:hover {
  box-shadow: 0 4px 20px color-mix(in srgb, var(--primary) 12%, transparent);
  transform: translateY(-2px);
}

.app-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9375rem;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}

.bw-icon {
  background: #1a1a1a;
  color: #ffffff;
}

.dark .bw-icon {
  background: #f0f0f0;
  color: #111111;
}

.app-info { flex: 1; min-width: 0; }

.app-info h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 0 0 8px;
}

.app-info p {
  font-size: 0.9375rem;
  color: var(--muted-fg);
  margin: 0 0 16px;
  line-height: 1.6;
}

.app-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.15s;
  text-decoration: none;
}
.app-link:hover { gap: 10px; text-decoration: none; }
.app-link svg { width: 15px; height: 15px; }

.app-card-featured {
  flex-direction: column;
  gap: 0;
}

.app-card-top {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.app-meta h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--foreground);
  margin: 0 0 4px;
}

.app-platform {
  font-size: 0.8125rem;
  color: var(--muted-fg);
  font-weight: 500;
}

.app-desc {
  font-size: 0.9375rem;
  color: var(--muted-fg);
  margin: 0 0 20px;
  line-height: 1.65;
}

.app-features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.app-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--foreground);
  line-height: 1.5;
}

.app-features li svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary);
}

.app-features strong {
  color: var(--foreground);
}

.app-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.app-actions .btn-primary,
.app-actions .btn-ghost {
  font-size: 0.875rem;
  padding: 10px 20px;
}

.app-card-more {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-style: dashed;
  background: transparent;
  min-height: 140px;
}
.app-card-more:hover {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 4%, transparent);
}

.more-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1.5px dashed var(--muted-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-fg);
  margin-bottom: 12px;
}
.more-icon svg { width: 20px; height: 20px; }

.app-card-more p {
  color: var(--muted-fg);
  font-size: 0.9375rem;
  font-weight: 500;
  margin: 0;
}

/* ── Footer ── */
.site-footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 48px 24px 24px;
  margin-top: auto;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--foreground);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 10px;
  text-decoration: none;
}
.footer-brand:hover { text-decoration: none; color: var(--foreground); }

.footer-tagline {
  font-size: 0.875rem;
  color: var(--muted-fg);
  margin: 0;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--foreground);
  margin: 0 0 12px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li a {
  font-size: 0.875rem;
  color: var(--muted-fg);
  text-decoration: none;
  font-weight: 400;
  transition: color 0.15s;
}
.footer-col ul li a:hover { color: var(--foreground); text-decoration: none; }

.footer-bottom {
  max-width: 1080px;
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--muted-fg);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .pillars {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .hero { padding: 64px 20px 56px; }
  .section { padding: 56px 20px; }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}