/* docs/style.css */

/* ── Design tokens ── */
:root {
  --color-bg: #ffffff;
  --color-text: #0f172a;
  --color-text-secondary: #64748b;
  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-code-bg: #f8fafc;
  --color-border: #e2e8f0;
  --color-invert-bg: #0f172a;
  --color-invert-text: #f8fafc;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 760px;
  --radius: 8px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }

/* ── Shared layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Typography scale ── */
h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 16px; }
h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
p  { color: var(--color-text-secondary); margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav__brand {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.nav__github {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}
.nav__github:hover { color: var(--color-accent); }

/* ── Hero ── */
.hero {
  padding: 80px 0;
  text-align: center;
}
.hero__inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.hero__sub {
  font-size: 1.125rem;
  max-width: 540px;
  color: var(--color-text-secondary);
  margin: 0;
}
.hero__install {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px 24px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-text);
  display: inline-block;
}
.hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border: 2px solid var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-bg);
}
.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}
.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ── Problem ── */
.problem {
  background: var(--color-invert-bg);
  color: var(--color-invert-text);
  padding: 64px 0;
  text-align: center;
}
.problem__inner { max-width: 600px; margin: 0 auto; }
.problem p {
  color: #94a3b8;
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 16px;
}
.problem__callout {
  color: var(--color-accent) !important;
  font-size: 1.25rem !important;
  font-weight: 600;
  margin-top: 8px;
}

/* ── Loop ── */
.loop { padding: 72px 0; }
.loop h2 { text-align: center; margin-bottom: 48px; }
.loop__steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.loop__step {
  flex: 1;
  text-align: center;
  padding: 0 24px;
}
.loop__num {
  display: inline-block;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 12px;
}
.loop__step h3 { font-size: 1rem; margin-bottom: 8px; }
.loop__step p  { font-size: 0.9rem; }
.loop__step code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-code-bg);
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--color-text);
}
.loop__divider {
  width: 40px;
  height: 1px;
  background: var(--color-border);
  margin-top: 28px;
  flex-shrink: 0;
}

@media (max-width: 600px) {
  .loop__steps { flex-direction: column; align-items: center; }
  .loop__divider { width: 1px; height: 24px; margin: 0; }
  .loop__step { padding: 8px 0; }
}

/* ── Features ── */
.features {
  background: var(--color-code-bg);
  padding: 72px 0;
}
.features h2 { text-align: center; margin-bottom: 40px; }
.features__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow 0.15s;
}
.feature-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.07);
}
.feature-card__icon { font-size: 1.5rem; display: block; margin-bottom: 12px; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; margin: 0; }
.feature-card code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-code-bg);
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--color-text);
}

@media (max-width: 600px) {
  .features__grid { grid-template-columns: 1fr; }
}

/* ── Quick start ── */
.quickstart { padding: 72px 0; }
.quickstart h2 { margin-bottom: 40px; }
.qs-step { margin-bottom: 24px; }
.qs-step__label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

/* Light code block (inline steps) */
.code-block {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text);
  overflow-x: auto;
  white-space: pre;
}

/* Dark terminal block (doctor output) */
.terminal-block {
  background: var(--color-invert-bg);
  border-radius: var(--radius);
  padding: 24px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: #94a3b8;
  overflow-x: auto;
  white-space: pre;
  margin-top: 32px;
}
.t-check  { color: #4ade80; }
.t-success { color: var(--color-invert-text); font-weight: 600; }

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
  text-align: center;
}
.footer__inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.footer__badges { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.footer__badges img { height: 20px; }
.footer__links {
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.footer__links a { color: var(--color-text-secondary); }
.footer__links a:hover { color: var(--color-accent); }