/* xplor.me landing page — minimal, fast, no external assets. */

:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --fg: #0b1220;
  --fg-muted: #4b5566;
  --accent: #2d5af0;
  --accent-fg: #ffffff;
  --border: #e5e8ee;
  --max-width: 760px;
  --radius: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #111a2e;
    --fg: #e8ecf3;
    --fg-muted: #9aa3b2;
    --accent: #6c8cff;
    --accent-fg: #0b1220;
    --border: #1f2a44;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  background: var(--accent);
  color: var(--accent-fg);
  padding: 8px 12px;
  border-radius: var(--radius);
}
.skip-link:focus { left: 12px; top: 12px; z-index: 100; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  max-width: 1080px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
}
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 22px; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
}
.site-nav a { color: var(--fg-muted); }
.site-nav a:hover { color: var(--fg); }
.site-nav .btn-primary { color: var(--accent-fg); }

@media (max-width: 640px) {
  .site-nav a:not(.btn) { display: none; }
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-lg { padding: 12px 22px; font-size: 17px; }
.btn-wide { padding-left: 48px; padding-right: 48px; min-width: 280px; text-align: center; }
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-alt); }

/* Hero */
.hero {
  padding: 64px 0 40px;
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.hero .lede {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 620px;
  margin: 0 0 24px;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 28px;
}
.hero-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--fg-muted);
  font-size: 15px;
}
.hero-bullets li::before {
  content: "✓";
  color: var(--accent);
  margin-right: 6px;
  font-weight: 700;
}

/* Long-form content (rendered from content.md) */
.content {
  padding: 48px 20px 64px;
}
.content h2 {
  font-size: 26px;
  margin: 48px 0 12px;
  letter-spacing: -0.01em;
  scroll-margin-top: 80px;
}
.content h2:first-child { margin-top: 0; }
.content h3 {
  font-size: 19px;
  margin: 28px 0 8px;
  scroll-margin-top: 80px;
}
.content p { margin: 0 0 14px; }
.content ul, .content ol { padding-left: 22px; margin: 0 0 14px; }
.content li { margin: 4px 0; }
.content code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--bg-alt);
  padding: 1px 6px;
  border-radius: 4px;
}
.content pre {
  background: var(--bg-alt);
  padding: 14px 16px;
  border-radius: var(--radius);
  overflow-x: auto;
}
.content pre code { background: none; padding: 0; }
.content blockquote {
  border-left: 3px solid var(--accent);
  margin: 16px 0;
  padding: 4px 16px;
  color: var(--fg-muted);
}
.content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 28px 0;
  font-size: 14px;
  color: var(--fg-muted);
}
.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  max-width: 1080px;
  padding: 0 20px;
}
.footer-row p { margin: 0; }