/* Bold Gradient theme — palette is substituted at generate time via string.Template. */
:root {
  --bg: #4941D1;
  --fg: #F9FAFB;
  --muted: #9CA3AF;
  --card: #524AD3;
  --accent: #D3D3F9;
  --grad-a: #D3D3F9;
  --grad-b: #5553E1;
  --cta-bg: #FFFFFF;
  --cta-fg: #0F172A;
  --radius: 14px;
  --border: 1px solid rgba(255,255,255,0.08);
  --shadow: 0 12px 48px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--fg); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: var(--border);
  background: rgba(0,0,0,0.2);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); min-width: 0; }
.brand strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-icon { border-radius: 8px; flex-shrink: 0; }
.site-header nav { display: flex; gap: 18px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--fg); }

/* CSS-only mobile menu (no JS). Checkbox + label toggles the nav at narrow widths. */
/* Visually hide the checkbox but keep it in the accessibility tree + focus order. */
.nav-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.nav-toggle-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--fg);
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle-btn:hover, .nav-toggle:focus-visible + .nav-toggle-btn {
  background: rgba(255,255,255,0.06);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.nav-toggle-btn svg { display: block; }

@media (max-width: 720px) {
  .site-header { padding: 12px 16px; }
  .nav-toggle-btn { display: inline-flex; }
  .site-header nav {
    display: none;
    position: absolute;
    top: 100%;
    right: 12px;
    flex-direction: column;
    gap: 0;
    background: var(--card);
    border: var(--border);
    border-radius: var(--radius);
    padding: 8px;
    min-width: 200px;
    box-shadow: var(--shadow);
  }
  .site-header nav a {
    display: block;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 15px;
  }
  .site-header nav a:hover, .site-header nav a[aria-current="page"] {
    background: rgba(255,255,255,0.04);
  }
  .nav-toggle:checked ~ nav { display: flex; }
}

.hero {
  text-align: center;
  padding: 96px 24px 64px;
  max-width: 920px;
  margin: 0 auto;
}
.hero-icon { border-radius: 24px; box-shadow: var(--shadow); margin-bottom: 24px; }
.hero h1 {
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  font-weight: 800;
}
.gradient-text {
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.subhead {
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 19px);
  max-width: 620px;
  margin: 0 auto 32px;
}
.cta {
  display: inline-block;
  background: var(--cta-bg);
  color: var(--cta-fg);
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform .15s ease;
}
.cta:hover { transform: translateY(-1px); }
.cta[aria-disabled="true"] { opacity: 0.7; pointer-events: none; }

.screens {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px;
}
.section-label {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin: 0 0 28px;
}
.screen-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.screen-card {
  background: var(--card);
  border: var(--border);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}
.screen-card img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
}
.screen-card.placeholder {
  aspect-ratio: 9 / 16;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  color: var(--cta-fg);
  font-weight: 600;
}

.features {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--card);
  border: var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.feature-card h3 { margin: 0 0 8px; font-size: 18px; }
.feature-card p { margin: 0; color: var(--muted); }

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.page h1 { font-size: clamp(32px, 4vw, 48px); margin: 0 0 24px; }
.page h2 { margin-top: 32px; }
.prose p { color: var(--muted); }
.prose a { color: var(--fg); text-decoration: underline; }

.site-footer {
  border-top: var(--border);
  padding: 28px 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}
.site-footer a { color: var(--muted); }