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

:root {
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --bg: #fafafa;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --max-w: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f1a;
    --bg-card: #141b2d;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #1e293b;
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
  max-width: 100%;
}

/* ── Layout ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Navigation ──────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(250, 250, 250, 0.8);
  border-bottom: 1px solid var(--border);
}

@media (prefers-color-scheme: dark) {
  .site-nav {
    background: rgba(11, 15, 26, 0.8);
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: grid;
  place-items: center;
  color: white;
  font-weight: 800;
  font-size: 0.75rem;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  padding: 120px 0 80px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 20px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.5;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
}

.hero-cta:hover {
  color: var(--text);
}

.hero-cta .arrow {
  transition: transform 0.2s;
}

.hero-cta:hover .arrow {
  transform: translateY(4px);
}

/* ── Section ─────────────────────────────────────────────── */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* ── App Cards Grid ──────────────────────────────────────── */
#apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 480px), 1fr));
  gap: 32px;
}

.app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--card-color), var(--card-accent));
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  .app-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
  }
}

.app-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.app-icon {
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.app-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-platform {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.app-tagline {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--card-color);
  margin-bottom: 8px;
}

@media (prefers-color-scheme: dark) {
  .app-tagline {
    color: var(--card-accent);
  }
}

.app-description {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.app-features {
  list-style: none;
  margin-bottom: 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.app-features li {
  position: relative;
  padding-left: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.app-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--card-accent);
}

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

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--btn-color, #0f172a);
  color: white;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--border);
}

/* ── About Section ───────────────────────────────────────── */
.about-content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-brand {
  font-weight: 700;
  font-size: 1rem;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

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

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .hero {
    padding: 80px 0 48px;
  }

  .app-card {
    padding: 28px;
  }

  .nav-links {
    display: none;
  }

  .section {
    padding: 56px 0;
  }
}

/* ── Utilities ───────────────────────────────────────────── */
.error {
  text-align: center;
  color: var(--text-muted);
  padding: 40px;
}

/* ── Loading skeleton ────────────────────────────────────── */
.loading-skeleton {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  min-height: 400px;
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}