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

:root {
  /* Backgrounds */
  --bg:              #f9fafb;
  --surface:         #ffffff;
  --surface-muted:   #f3f4f6;

  /* Text */
  --text-primary:    #111827;
  --text-secondary:  #6b7280;
  --text-disabled:   #9ca3af;
  --text-inverse:    #ffffff;

  /* Brand / interactive */
  --primary:         #2563eb;
  --primary-muted:   #eff6ff;
  --primary-border:  #bfdbfe;

  /* Semantic */
  --danger:          #ef4444;
  --danger-muted:    #fef2f2;
  --success:         #22c55e;
  --success-muted:   #f0fdf4;
  --warning:         #f59e0b;
  --warning-muted:   #fffbeb;

  /* Borders */
  --border:          #e5e7eb;
  --border-focus:    #2563eb;

  /* Radii */
  --radius-sm:       6px;
  --radius-md:       10px;
  --radius-lg:       16px;
  --radius-xl:       24px;
  --radius-full:     9999px;

  /* Layout */
  --max:             760px;

  /* Shadows */
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --shadow-md: 0 1px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
}

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

/* ── Nav ──────────────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.nav-logo span { color: var(--primary); }

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

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

.nav-links a:hover { color: var(--text-primary); text-decoration: none; }

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 60px 24px 20px;
  max-width: var(--max);
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: var(--primary-muted);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-full);
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.hero h1 em {
  font-style: normal;
  color: var(--primary);
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
}

.cta-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  border: none;
}

.btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }

.btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: var(--primary-muted);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

/* ── Feature Graphic ──────────────────────────────────────── */
.feature-graphic-wrap {
  max-width: calc(var(--max) + 48px);
  margin: 0 auto 30px;
  padding: 0 24px;
}

.feature-graphic {
  display: block;
  width: 100%;
  height: auto;
}

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

.section-label {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 48px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
  display: block;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Platforms ────────────────────────────────────────────── */
.platforms {
  text-align: center;
  padding: 60px 24px;
  border-top: 1px solid var(--border);
  background: var(--surface-muted);
}

.platforms h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.platforms p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.platform-badges {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 22px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}

.platform-badge:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.platform-icon { font-size: 1.3rem; }

/* ── Footer ───────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  background: var(--surface);
}

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

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

/* ── Inner Pages ──────────────────────────────────────────── */
.page-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 24px 40px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.page-hero .meta {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.page-content {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.page-content h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 36px 0 10px;
  color: var(--text-primary);
}

.page-content p,
.page-content li {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.page-content ul {
  padding-left: 20px;
  margin-bottom: 10px;
}

.page-content li { margin-bottom: 6px; }

.page-content a { color: var(--primary); }

/* ── Support Cards ────────────────────────────────────────── */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 32px 0;
}

.support-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
}

.support-card .icon { font-size: 1.8rem; margin-bottom: 14px; display: block; }
.support-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; color: var(--text-primary); }
.support-card p { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 14px; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 480px) {
  nav { padding: 16px 20px; }
  .nav-links { gap: 16px; }
}