:root {
  --bg: radial-gradient(circle at top, #1f2937, #0f172a 45%, #0f172a);
  --surface: rgba(15, 23, 42, 0.65);
  --border: rgba(148, 163, 184, 0.25);
  --accent: #38bdf8;
  --text: #e2e8f0;
  --muted: rgba(226, 232, 240, 0.6);
  --radius-lg: 1.3rem;
  --radius: 0.9rem;
  --shadow: 0 20px 40px rgba(15, 23, 42, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a {
  color: inherit;
}

.container {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0 1.3rem;
}

.topbar {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.35);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.06);
  z-index: 50;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-weight: 700;
  letter-spacing: -0.03em;
}
.menu-toggle {
  border: 1px solid rgba(148, 163, 184, 0.45);
  background: rgba(15, 23, 42, 0.6);
  color: var(--muted);
  border-radius: 999px;
  padding: 0.25rem 0.9rem;
  font-size: 0.8rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.menu-toggle-icon { font-size: 1rem; line-height:1; }
.nav { display:none; }
body.menu-open .nav { display:flex; flex-wrap:wrap; gap:0.35rem 1rem; }


.nav a {
  margin-left: 1.1rem;
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--muted);
  padding: 0.35rem 0.1rem;
}

.nav a.active,
.nav a:hover {
  color: #fff;
}

.hero {
  padding: 3.8rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.badge {
  display: inline-block;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 0.7rem;
}

h1 {
  font-size: clamp(2.3rem, 4vw, 3rem);
  margin-bottom: 0.8rem;
  letter-spacing: -0.04em;
}

.lead {
  color: var(--muted);
  max-width: 35rem;
  margin-bottom: 1.5rem;
}

.buttons {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}

.btn.primary {
  background: var(--accent);
  color: #0f172a;
  box-shadow: 0 12px 35px rgba(56, 189, 248, 0.35);
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.35);
  border-color: rgba(148, 163, 184, 0.15);
}

.hero-card {
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.3rem 1.3rem;
  box-shadow: var(--shadow);
}

.hero-card h2 {
  margin-top: 0;
}

.hero-card ul {
  padding-left: 1.1rem;
  line-height: 1.6;
  color: var(--muted);
}

.section {
  padding: 3rem 0 3.5rem;
}

.section h2 {
  margin-bottom: 0.6rem;
}

.section-text {
  color: var(--muted);
  margin-bottom: 1.8rem;
  max-width: 42rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.3rem;
}

.card {
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.06);
  border-radius: 1rem;
  padding: 1rem 1rem 1.1rem;
  text-decoration: none;
  transition: transform 0.1s ease-out, border 0.1s ease-out;
  min-height: 150px;
}
.card:hover {
  transform: translateY(-2px);
  border: 1px solid rgba(56, 189, 248, 0.4);
}
.card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.card h3 {
  margin-top: 0;
}
.linkish {
  font-size: 0.8rem;
  color: rgba(226, 232, 240, 0.6);
}

.page {
  padding: 3rem 0 3.5rem;
}

.narrow {
  max-width: 700px;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
}

.highlight {
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-left: 4px solid rgba(56, 189, 248, 0.8);
  padding: 0.8rem 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
}

.list {
  margin-left: 1.1rem;
  line-height: 1.5;
}

.note {
  background: rgba(15, 23, 42, 0.2);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 0.7rem;
  padding: 0.8rem 0.8rem 0.9rem;
  margin: 1.2rem 0;
}

.footer {
  border-top: 1px solid rgba(148, 163, 184, 0.03);
  padding: 1.5rem 0 2.5rem;
  text-align: center;
  color: rgba(226, 232, 240, 0.4);
  font-size: 0.8rem;
  margin-top: auto;
}

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .topbar-inner { height:auto; padding-top:0.4rem; padding-bottom:0.4rem; align-items:flex-start; gap:0.6rem; }
  .nav { width:100%; padding-bottom:0.4rem; }
  .nav a { margin-left:0; margin-right:1rem; padding:0.25rem 0; }
}

  .topbar-inner { height:auto; padding-top:0.4rem; padding-bottom:0.4rem; align-items:flex-start; gap:0.6rem; }
  .nav { width:100%; padding-bottom:0.4rem; }
  .nav a { margin-left:0; margin-right:1rem; padding:0.25rem 0; }
}
  .nav {
    display: none;
  }
}