/* ─────────────────────────────────────────────────────────────────────────────
   Aaron Raymer — personal site styles.
   Built on the Claude Design tokens: cool grays, Inter + JetBrains Mono,
   hairlines, cobalt accent, no drop shadows.
   ───────────────────────────────────────────────────────────────────────── */

/* Fonts: Inter self-hosted as variable font. JetBrains Mono via Google CDN. */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('fonts/Inter-VariableFont.ttf') format('truetype-variations');
}
@font-face {
  font-family: 'Inter';
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url('fonts/Inter-Italic-VariableFont.ttf') format('truetype-variations');
}
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Tokens ─────────────────────────────────────────────────────────────── */

:root {
  /* surfaces */
  --color-canvas:  #f7f8fa;
  --color-surface: #ffffff;
  --color-raised:  #fbfcfd;
  --color-muted:   #eef0f3;
  --color-subtle:  #dde1e8;
  --color-border:  #e4e7ec;

  /* text */
  --color-ink:           #0f172a;
  --color-ink-secondary: #475569;
  --color-ink-tertiary:  #64748b;
  --color-ink-faint:     #94a3b8;

  /* primary (cobalt, dim variant in light mode for contrast) */
  --color-primary:        #2c4ab0;
  --color-primary-hover:  #243d96;
  --color-primary-on:     #ffffff;

  /* radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* shadows (barely there) */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);

  /* easing */
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);

  /* type families */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* layout */
  --shell-narrow: 680px;
  --shell-padding-x: 24px;
}

.dark {
  --color-canvas:  #0c0d10;
  --color-surface: #15171c;
  --color-raised:  #1c1f26;
  --color-muted:   #262a33;
  --color-subtle:  #353945;
  --color-border:  #262a33;

  --color-ink:           #f1f5f9;
  --color-ink-secondary: #cbd5e1;
  --color-ink-tertiary:  #94a3b8;
  --color-ink-faint:     #64748b;

  /* dark mode uses the brighter cobalt variant for contrast */
  --color-primary:       #5577f5;
  --color-primary-hover: #7591ff;
  --color-primary-on:    #0c0d10;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* ── Reset + base ───────────────────────────────────────────────────────── */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { color: var(--color-primary-hover); }
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

button {
  font: inherit;
  cursor: pointer;
}

::selection {
  background: color-mix(in srgb, var(--color-primary) 22%, transparent);
}

/* Custom scrollbars (pro tools don't leave defaults). */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-subtle) transparent;
}
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--color-subtle);
  border-radius: 3px;
}

/* ── Utility ────────────────────────────────────────────────────────────── */

.shell {
  max-width: var(--shell-narrow);
  margin: 0 auto;
  padding-left: var(--shell-padding-x);
  padding-right: var(--shell-padding-x);
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--color-surface);
  color: var(--color-ink);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  z-index: 100;
  transition: top 140ms var(--ease-smooth);
}
.skip-link:focus { top: 16px; }

.text-link {
  color: var(--color-ink-secondary);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1px;
  transition: color 140ms var(--ease-smooth), border-color 140ms var(--ease-smooth);
}
.text-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.eyebrow {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-tertiary);
  margin: 0 0 12px;
}

/* ── Header ─────────────────────────────────────────────────────────────── */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-canvas) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.wordmark {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.wordmark:hover { color: var(--color-ink); }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-secondary);
  transition: background 140ms var(--ease-smooth), border-color 140ms var(--ease-smooth), color 140ms var(--ease-smooth);
}
.theme-toggle:hover {
  background: var(--color-muted);
  color: var(--color-ink);
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
}
.theme-toggle .icon-moon { display: none; }
.dark .theme-toggle .icon-sun { display: none; }
.dark .theme-toggle .icon-moon { display: block; }

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
  padding-top: 96px;
  padding-bottom: 64px;
}

.bio {
  margin: 0;
  font-size: 21px;
  line-height: 1.5;
  letter-spacing: -0.012em;
  color: var(--color-ink);
  max-width: 580px;
}

.subscribe-block {
  margin-top: 36px;
  max-width: 520px;
}

.subscribe-meta {
  margin: 10px 0 0;
  font-size: 12.5px;
  color: var(--color-ink-faint);
  letter-spacing: -0.005em;
}

/* Hairline bar — input + inline action, bottom border only. */
.bar {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--color-ink-faint);
  transition: border-color 200ms var(--ease-smooth), box-shadow 200ms var(--ease-smooth);
}
.bar:focus-within {
  border-color: var(--color-ink);
  box-shadow: 0 1px 0 0 var(--color-ink);
}
.bar-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  padding: 10px 0;
  font: 400 15px/1.4 var(--font-sans);
  letter-spacing: -0.005em;
  color: var(--color-ink);
}
.bar-input::placeholder { color: var(--color-ink-faint); }
.bar-action {
  background: transparent;
  border: 0;
  padding: 10px 0 10px 16px;
  font: 500 13.5px/1.4 var(--font-sans);
  letter-spacing: -0.005em;
  color: var(--color-ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  transition: color 140ms var(--ease-smooth), gap 140ms var(--ease-smooth);
}
.bar-action:hover { color: var(--color-primary); gap: 10px; }
.bar-action:disabled { color: var(--color-ink-faint); cursor: default; }
.bar-action svg { flex: none; }

/* ── Section ────────────────────────────────────────────────────────────── */

.section {
  padding-top: 64px;
  padding-bottom: 96px;
}

.prose {
  max-width: var(--shell-narrow);
}
.prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink-secondary);
}
.prose p:last-child { margin-bottom: 0; }

/* ── Footer ─────────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 120px;
  padding-top: 48px;
  padding-bottom: 32px;
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 32px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-name {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.footer-eyebrow {
  margin: 0;
  color: var(--color-ink-tertiary);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-ink-tertiary);
  transition: color 140ms var(--ease-smooth);
}
.footer-link:hover { color: var(--color-primary); }
.footer-link svg { flex: none; }

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.footer-copy {
  font-size: 12px;
  color: var(--color-ink-faint);
}
.footer-version {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-faint);
  letter-spacing: 0.01em;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 560px) {
  .hero {
    padding-top: 64px;
    padding-bottom: 48px;
  }
  .bio {
    font-size: 19px;
  }
  .subscribe-block { margin-top: 36px; }
  .section { padding-bottom: 72px; }
  .site-footer { margin-top: 80px; padding-top: 36px; }
  .footer-top { flex-direction: column; gap: 20px; }
  .footer-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
}