/* ===========================================
   Fluent UI–inspired splash page styling
   - Segoe UI typography
   - Neutral surfaces, subtle shadows
   - Focus rings, accessibility
   - Light/Dark mode via prefers-color-scheme
   =========================================== */

:root {
  /* Typography */
  --font-sans: "Segoe UI", SegoeUI, system-ui, -apple-system, Arial, sans-serif;

  /* Fluent-like spacing + radius */
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;

  /* Base tokens (light) */
  --bg: #f5f6f8;
  --bg-accent: #eef3ff;
  --surface: rgba(255, 255, 255, 0.85);
  --surface-strong: rgba(255, 255, 255, 0.95);
  --border: rgba(0, 0, 0, 0.08);

  --text: #1b1a19;          /* Fluent neutral foreground */
  --muted: rgba(27, 26, 25, 0.72);
  --subtle: rgba(27, 26, 25, 0.55);

  --primary: #2563eb;       /* Fluent-ish blue */
  --primary-hover: #1d4ed8;
  --primary-pressed: #1e40af;

  --focus: rgba(37, 99, 235, 0.45);

  --shadow-1: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-2: 0 10px 30px rgba(0,0,0,0.10);

  --grid-max: 1100px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f19;
    --bg-accent: #0d1b3b;
    --surface: rgba(20, 24, 33, 0.70);
    --surface-strong: rgba(20, 24, 33, 0.88);
    --border: rgba(255, 255, 255, 0.10);

    --text: rgba(255, 255, 255, 0.92);
    --muted: rgba(255, 255, 255, 0.72);
    --subtle: rgba(255, 255, 255, 0.55);

    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-pressed: #2563eb;

    --focus: rgba(96, 165, 250, 0.40);

    --shadow-1: 0 1px 2px rgba(0,0,0,0.45);
    --shadow-2: 0 12px 34px rgba(0,0,0,0.60);
  }
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);

  /* Fluent-y layered background */
  background:
    radial-gradient(1200px 600px at 20% 10%, var(--bg-accent), transparent 60%),
    radial-gradient(900px 600px at 85% 30%, rgba(37, 99, 235, 0.14), transparent 55%),
    radial-gradient(800px 500px at 50% 95%, rgba(16, 185, 129, 0.10), transparent 55%),
    var(--bg);

  line-height: 1.5;
}

/* Accessible skip link */
.skip-link {
  position: absolute;
  left: 12px;
  top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  color: var(--text);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
  z-index: 9999;
  box-shadow: var(--shadow-1);
  text-decoration: none;
}
.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* App shell ensures footer stays at bottom */
.app-shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

/* Top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(245, 246, 248, 0.70);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
  .topbar { background: rgba(11, 15, 25, 0.65); }
}

.topbar-inner {
  max-width: var(--grid-max);
  margin: 0 auto;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

.dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  opacity: 0.95;
}
.dot-1 { background: #2563eb; left: 8px; top: 8px; }
.dot-2 { background: #10b981; right: 8px; top: 8px; }
.dot-3 { background: #f59e0b; left: 8px; bottom: 8px; }
.dot-4 { background: #a855f7; right: 8px; bottom: 8px; }

.brand-text { min-width: 0; }
.brand-name {
  font-weight: 700;
  letter-spacing: -0.2px;
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.brand-tagline {
  font-size: 12.5px;
  color: var(--subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  font-size: 12.5px;
  color: var(--muted);
}

/* Main layout */
.main {
  flex: 1;
  display: grid;
  place-items: center;
  padding: 28px 18px 24px;
}

.hero {
  width: 100%;
  max-width: var(--grid-max);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 18px;
  align-items: start;
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards */
.card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-2);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.hero-card {
  padding: 22px 22px 20px;
}

.side-card {
  padding: 18px 18px 16px;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--muted);
  font-size: 12.5px;
  box-shadow: var(--shadow-1);
}

.badge-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

/* Headings and text */
.hero-title {
  margin: 6px 0 6px;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.6px;
}

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

.hero-subtitle {
  margin: 0 0 14px;
  font-size: 16.5px;
  color: var(--muted);
}

.hero-body {
  margin: 10px 0;
  color: var(--muted);
  font-size: 14.75px;
}

/* Feature list */
.feature-list {
  margin: 16px 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.feature-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.40);
}
@media (prefers-color-scheme: dark) {
  .feature-list li { background: rgba(255, 255, 255, 0.04); }
}

.icon {
  width: 26px;
  height: 26px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  box-shadow: var(--shadow-1);
  flex: 0 0 auto;
}

/* Buttons (Fluent-ish) */
.cta-row {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.06s ease, background 0.15s ease, border-color 0.15s ease;
  box-shadow: var(--shadow-1);
}

.btn:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary);
  border-color: rgba(0,0,0,0.08);
  color: white;
}

.btn-primary:hover { background: var(--primary-hover); }
.btn-primary:active { background: var(--primary-pressed); transform: translateY(1px); }

.btn-secondary {
  background: var(--surface-strong);
  color: var(--text);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.96);
}

@media (prefers-color-scheme: dark) {
  .btn-secondary:hover { background: rgba(255, 255, 255, 0.10); }
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* Side card */
.side-title {
  margin: 2px 0 14px;
  font-size: 16px;
  letter-spacing: -0.2px;
}

.side-block {
  padding: 12px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.40);
  margin-bottom: 10px;
}
@media (prefers-color-scheme: dark) {
  .side-block { background: rgba(255, 255, 255, 0.04); }
}

.side-label {
  font-size: 12px;
  color: var(--subtle);
  margin-bottom: 6px;
}

.side-value {
  font-size: 13.5px;
  color: var(--muted);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 14px 2px;
}

.side-note {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13.5px;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12.5px;
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #f59e0b;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.18);
}

.fineprint {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--subtle);
}

/* Footer */
.footer {
  padding: 16px 18px 18px;
  color: var(--subtle);
}

.footer-inner {
  max-width: var(--grid-max);
  margin: 0 auto;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
}

.footer-sep { opacity: 0.7; }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}