/* ── Roadstep Brand Colors ─────────────────────────────────────── */
:root {
  --color-primary: #4A90E2;
  --color-orange: #F5A623;
  --color-teal: #50E3C2;
  --color-charcoal: #1C1C1C;

  --color-primary-light: #E6F0FA;
  --color-teal-light: #EDFDF9;
  --color-amber: #f59e0b;

  --color-surface: #FFFFFF;
  --color-surface-raised: #F5F5F5;
  --color-border: #E0E0E0;
  --color-border-subtle: #E6F0FA;

  --color-secondary: #71717a;
  --color-muted: #9ca3af;
  --color-disabled: #a1a1aa;

  --color-error: #ef4444;
  --color-error-bg: #fef2f2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-charcoal: #EDEDED;
    --color-primary-light: #1a2a3a;
    --color-teal-light: #0d2a25;
    --color-surface: #121212;
    --color-surface-raised: #1C1C1C;
    --color-border: #2E2E2E;
    --color-border-subtle: #1e1e1e;
    --color-secondary: #A0A0A0;
    --color-muted: #6B6B6B;
    --color-disabled: #555555;
    --color-error: #FC8181;
    --color-error-bg: #2d1515;
  }
}

/* ── Reset & Base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--color-surface);
  color: var(--color-charcoal);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Nav ───────────────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 2rem;
}

.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.nav-logo .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-teal);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--color-secondary);
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--color-primary); }

/* ── Page Shell ────────────────────────────────────────────────── */
.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

/* ── Hero ──────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-teal-light) 100%);
  border-bottom: 1px solid var(--color-border-subtle);
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.25rem 0.875rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--color-charcoal);
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1rem;
  color: var(--color-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* ── Index Card Grid ───────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 2rem;
}

.card {
  display: block;
  text-decoration: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 24px rgba(74, 144, 226, 0.12);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.card h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 0.4rem;
}

.card p {
  font-size: 0.875rem;
  color: var(--color-secondary);
  line-height: 1.5;
}

/* ── Document Content ──────────────────────────────────────────── */
.doc-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.doc-header .eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.doc-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--color-charcoal);
  margin-bottom: 0.5rem;
}

.doc-header .meta {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.doc-content h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin: 2.25rem 0 0.75rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-primary);
}

.doc-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin: 1.5rem 0 0.5rem;
}

.doc-content p {
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

.doc-content ul, .doc-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--color-secondary);
}

.doc-content li { margin-bottom: 0.4rem; }

.doc-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc-content a:hover { opacity: 0.8; }

.highlight-box {
  background: var(--color-primary-light);
  border: 1px solid var(--color-border-subtle);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  color: var(--color-charcoal);
  font-size: 0.9rem;
}

/* ── Footer ────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem;
  text-align: center;
}

.footer-inner {
  max-width: 900px;
  margin: 0 auto;
}

footer p {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 0.5rem;
}

footer nav {
  position: static;
  background: none;
  border: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

footer nav a {
  font-size: 0.8rem;
  color: var(--color-secondary);
  text-decoration: none;
}

footer nav a:hover { color: var(--color-primary); }

/* ── Support Page ───────────────────────────────────────────────── */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.support-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
}

.support-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-charcoal);
  margin-bottom: 0.5rem;
}

.support-card p {
  font-size: 0.85rem;
  color: var(--color-secondary);
  margin: 0;
}

.support-card a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.support-card a:hover { text-decoration: underline; }

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 0;
}

.faq-item:last-child { border-bottom: none; }

.faq-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: 0.5rem;
}

.faq-item p {
  font-size: 0.875rem;
  color: var(--color-secondary);
  margin: 0;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--color-teal-light);
  color: var(--color-teal);
  border: 1px solid var(--color-teal);
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: 0.8rem; }
  .page { padding: 2rem 1.25rem 4rem; }
}