/* ==========================================================================
   Base: design tokens, reset, typography, buttons, utilities
   ========================================================================== */

:root {
  --bg: #FAF7F2;
  --surface: #FFFFFF;
  --surface2: #F1ECE3;
  --ink: #23262B;
  --muted: #585C63;
  --line: #E2DACD;
  --accent: #0F5E5A;
  --accent-ink: #FFFFFF;
  --accent-soft: #E2EDEA;
  --bronze: #987762;
  --bronze-ink: #7A5C49;
  --code: #1E2227;

  --font-serif: 'Source Serif 4', Georgia, serif;
  --font-sans: Inter, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;

  --max: 1200px;
  --gutter: clamp(20px, 4vw, 48px);
  --header-h: 72px;
  --radius: 10px;
  --radius-sm: 6px;

  color-scheme: light;
}

html.dark {
  --bg: #15181C;
  --surface: #1C2025;
  --surface2: #23282E;
  --ink: #ECE7DF;
  --muted: #A8ADB4;
  --line: #30363D;
  --accent: #62BDB4;
  --accent-ink: #0D1B1A;
  --accent-soft: #1B3331;
  --bronze: #B8977F;
  --bronze-ink: #CDB09A;
  --code: #0F1215;
  color-scheme: dark;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 24px); }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
img, svg, video, iframe { max-width: 100%; display: block; }
img { height: auto; }
button, input, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; }
p { margin: 0; }
ul, ol { margin: 0; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
::selection { background: var(--accent-soft); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

/* Typography helpers */
.serif { font-family: var(--font-serif); }
.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }

.eyebrow {
  font: 500 12px/1.4 var(--font-mono);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

.num { font: 500 12px var(--font-mono); color: var(--bronze-ink); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: opacity .15s, background-color .15s, color .15s, border-color .15s;
}
.btn-sm { height: 40px; padding: 0 16px; font-size: 14px; }
.btn-md { height: 48px; padding: 0 20px; font-size: 15px; }

.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { opacity: .9; color: var(--accent-ink); }

.btn-outline { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--ink); color: var(--bg); }

.btn-light { background: var(--bg); color: var(--ink); }
.btn-light:hover { color: var(--accent); }

.btn-ink { background: var(--ink); color: var(--bg); border: 0; }
.btn-ink:hover { opacity: .9; }

.btn[disabled] { opacity: .6; cursor: progress; }

/* Text link with arrow */
.link-more { font-size: 15px; font-weight: 500; text-decoration: none; }

/* Tags / badges */
.tag {
  display: inline-flex;
  align-items: center;
  font: 500 12px/1 var(--font-mono);
  padding: 6px 8px;
  border-radius: 4px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.tag-accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.tag-solid { background: var(--accent); color: var(--accent-ink); border-color: transparent; }

/* Hatched image placeholder (used when no image is set) */
.img-ph {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: repeating-linear-gradient(135deg, var(--surface2) 0 10px, var(--bg) 10px 20px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.img-ph span {
  font: 400 12px var(--font-mono);
  color: var(--muted);
  background: var(--bg);
  padding: 4px 8px;
  border-radius: 3px;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}
.skip-link:focus { top: 12px; color: var(--bg); }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

[hidden] { display: none !important; }

/* Loading + error states */
.page-loading { min-height: 50vh; }
.page-error {
  max-width: var(--max);
  margin: 0 auto;
  padding: 96px var(--gutter);
  text-align: center;
  color: var(--muted);
}
.page-error h1 { font: 400 40px/1.1 var(--font-serif); color: var(--ink); margin-bottom: 16px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}