:root {
  --bg: #ffffff;
  --bg-2: #f5f7fb;
  --fg: #0d1f3c;
  --muted: #5a6a87;
  --accent: #4ea1ff;
  --accent-strong: #2563eb;
  --card: #ffffff;
  --card-hover: #f0f4fb;
  --border: #e2e8f0;
  --shadow: 0 1px 2px rgba(13, 31, 60, 0.04), 0 8px 24px rgba(13, 31, 60, 0.06);
  --radius: 14px;
}

* { 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 Neue", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  height: 40px;
  width: auto;
  display: block;
}

.brand-tag {
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.2px;
}

main {
  flex: 1;
  padding: 72px 0 96px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.lead {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.lead-icon {
  width: 96px;
  height: 96px;
  display: block;
  margin: 0 auto 24px;
  filter: drop-shadow(0 8px 24px rgba(78, 161, 255, 0.25));
}

.lead h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  margin: 0 0 18px;
  letter-spacing: -1.2px;
  color: var(--fg);
}

.lead p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--fg);
  box-shadow: var(--shadow);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.link-card:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 31, 60, 0.08), 0 16px 32px rgba(13, 31, 60, 0.08);
}

.link-card[aria-disabled="true"] {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.link-icon {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 4px;
}

.link-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
}

.link-sub {
  font-size: 13px;
  color: var(--muted);
}

footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  background: var(--bg);
}

footer .container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--accent-strong);
}

.dot {
  opacity: 0.5;
}