:root {
  --bg: #020617;
  --panel: #0f172a;
  --panel-soft: rgba(15, 23, 42, 0.9);
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --good: #22c55e;
  --warn: #eab308;
  --err: #f87171;
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #0f172a 0%, #020617 55%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: #7dd3fc; }

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 48px;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
}

nav { display: flex; gap: 4px; }

nav a {
  font-size: 0.9rem;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 8px;
  transition: color 0.15s, background 0.15s;
}

nav a:hover {
  color: var(--text);
  background: rgba(56, 189, 248, 0.08);
}

nav a.active {
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
}

/* Page title */
.page-title {
  font-size: clamp(2rem, 3vw, 2.6rem);
  line-height: 1.15;
  margin-bottom: 16px;
}

.page-title span { color: var(--accent); }

.page-subtitle {
  color: var(--muted);
  max-width: 680px;
  margin-bottom: 40px;
  font-size: 1rem;
}

/* Sections */
section { margin-bottom: 64px; }

h2 {
  font-size: 1.5rem;
  margin-bottom: 14px;
}

.section-text {
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 20px;
}

/* Grids */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .grid, .grid-2 { grid-template-columns: 1fr; }
}

/* Cards */
.card {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  font-size: 0.9rem;
}

.card h3 { margin-bottom: 6px; font-size: 1rem; }
.card p { color: var(--muted); }

.feature-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 12px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}

@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 500px) {
  .steps { grid-template-columns: 1fr; }
}

.step {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  font-size: 0.9rem;
  counter-increment: step;
}

.step h3::before {
  content: counter(step) ". ";
  color: var(--accent);
}

.step h3 { font-size: 0.95rem; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 0.85rem; }

/* Lists */
ul.clean { list-style: none; margin-top: 8px; }

ul.clean li {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

ul.clean li::before {
  content: "\2022";
  color: var(--accent);
}

/* Hero (home only) */
.hero {
  margin-bottom: 72px;
  max-width: 680px;
}

.hero h1 {
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  line-height: 1.12;
  margin-bottom: 20px;
}

.hero h1 span { color: var(--accent); }

.hero p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 16px;
  max-width: 600px;
}

/* Highlight row on home */
.highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 64px;
}

@media (max-width: 700px) {
  .highlights { grid-template-columns: 1fr; }
}

.highlight {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.highlight h3 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.highlight p {
  font-size: 0.85rem;
  color: var(--muted);
}

.highlight-accent {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 8px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  font-size: 0.75rem;
  color: var(--muted);
}

footer p { margin-bottom: 6px; }

/* Inline link style for feature page */
.feature-detail {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}

.feature-detail h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.feature-detail p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.feature-detail .tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.tag-green { background: rgba(34, 197, 94, 0.15); color: var(--good); }
.tag-blue { background: rgba(56, 189, 248, 0.15); color: var(--accent); }
.tag-yellow { background: rgba(234, 179, 8, 0.15); color: var(--warn); }