/* Design Agent — Modern Dark Theme
   Design inspiration: Hermes Tutorials, Linear, Vercel
*/

@font-face {
  font-family: 'Atkinson';
  src: url('/fonts/atkinson-regular.woff') format('woff');
  font-display: swap;
  font-weight: 400;
  font-style: normal;
}
@font-face {
  font-family: 'Atkinson';
  src: url('/fonts/atkinson-bold.woff') format('woff');
  font-display: swap;
  font-weight: 700;
  font-style: normal;
}

:root {
  /* Brand */
  --accent: #b8422e;
  --accent-dark: #9a3625;
  --accent-light: #d46a55;
  --accent-glow: rgba(184, 66, 46, 0.15);

  /* Neutral scale */
  --bg: #0a0a0b;
  --bg-secondary: #121214;
  --bg-tertiary: #1a1a1e;
  --border: #1e1e22;
  --border-light: #2a2a2e;

  /* Text */
  --text-primary: #e8e8ed;
  --text-secondary: #a1a1aa;
  --text-muted: #6b6b76;

  /* Sizing */
  --content-width: min(960px, calc(100vw - 4em));
  --grid-width: min(1200px, calc(100vw - 4em));
  --nav-height: 64px;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --border-hover: #3a3a42;

  /* Typography */
  --font-sans: 'Atkinson', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-sans);
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.75;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* ── Typography ── */
h1, h2, h3, h4 { margin: 0 0 0.5rem 0; color: #fff; line-height: 1.15; font-weight: 600; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.015em; }
h3 { font-size: 1.5rem; letter-spacing: -0.01em; }
h4 { font-size: 1.25rem; }
p { margin-bottom: 1.25em; }
strong, b { font-weight: 600; color: #fff; }
a { color: var(--accent-light); text-decoration: none; transition: color 0.15s ease; }
a:hover { color: #fff; }

/* ── Layout ── */
main {
  width: min(var(--content-width), calc(100% - 2em));
  margin: 0 auto;
  padding: 3em 1em;
}

/* ── Code ── */
code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.15em 0.4em;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  color: var(--text-primary);
}
pre {
  background: var(--bg-tertiary) !important;
  color: #e2e2e8;
  padding: 1.25em 1.5em;
  border-radius: var(--radius-md);
  font-size: 0.85em;
  overflow-x: auto;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  line-height: 1.6;
}
pre > code { all: unset; font-family: var(--font-mono); }

/* ── Blockquotes ── */
blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75em 1.25em;
  margin: 1.5em 0;
  font-size: 0.95em;
  color: var(--text-secondary);
  background: rgba(184, 66, 46, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
blockquote p { margin-bottom: 0; }

/* ── Tables ── */
table { display: block; width: 100%; max-width: 100%; border-collapse: collapse; font-size: 0.9em; margin: 1.5em 0; overflow-x: auto; }
th, td { padding: 0.6em 0.8em; text-align: left; border-bottom: 1px solid var(--border); }
th { color: #fff; font-weight: 600; background: var(--bg-secondary); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255, 255, 255, 0.02); }

/* ── HR ── */
hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }

/* ── Images ── */
img { max-width: 100%; height: auto; border-radius: var(--radius-md); }

/* ── Tags ── */
.tag {
  display: inline-block;
  padding: 0.2em 0.7em;
  font-size: 0.75em;
  border-radius: 999px;
  background: var(--accent-glow);
  color: var(--accent-light);
  text-decoration: none;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}
.tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

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

/* ── Card Grid ── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1em; margin: 1em 0 2em; }

@media (min-width: 1440px) {
  .card-grid { grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); }
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25em;
  background: var(--bg-secondary);
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
}
.card:hover { border-color: var(--border-light); background: var(--bg-tertiary); }
.card .top-row { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 0.3em; }
.card h2 { margin: 0; font-size: 1em; font-weight: 600; }
.card h3 { margin: 0; font-size: 1em; font-weight: 600; }
.card p { font-size: 0.84em; color: var(--text-secondary); margin: 0 0 0.6em; line-height: 1.5; flex-grow: 1; }
.card .card-description { font-size: 0.84em; color: var(--text-secondary); line-height: 1.5; }

/* ── Page Header ── */
.page-header { text-align: center; padding: 2em 0 1em; }
.page-header h1 { margin-bottom: 0.3em; font-size: 2.8rem; font-weight: 700; letter-spacing: -0.03em; }
.page-header .subtitle { color: var(--text-secondary); font-size: clamp(0.95em, 1.2vw, 1.1em); max-width: 680px; margin: 0 auto; }

/* ── Responsive ── */
@media (max-width: 720px) {
  body { font-size: 15px; }
  main { padding: 1.5em 1em; }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.3rem; }
  .card-grid { grid-template-columns: 1fr; }
}
@media (min-width: 1440px) {
  :root { --content-width: 1040px; --grid-width: 1400px; }
  body { font-size: 17px; }
}
@media (min-width: 1920px) {
  :root { --content-width: 1120px; --grid-width: 1600px; }
  body { font-size: 18px; }
}