@font-face{font-family:'Inter';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/inter-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/inter-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/inter-vietnamese.woff2') format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+1EA0-1EF9,U+20AB}
@font-face{font-family:'Space Grotesk';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/space-grotesk-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Space Grotesk';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/space-grotesk-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Space Grotesk';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/space-grotesk-vietnamese.woff2') format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+1EA0-1EF9,U+20AB}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/jetbrains-mono-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/jetbrains-mono-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-display:swap;font-weight:100 900;src:url('/assets/fonts/jetbrains-mono-vietnamese.woff2') format('woff2');unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+1EA0-1EF9,U+20AB}

:root {
  /* Dark-only palette (Blogtinum) */
  --bg: #0b0f14;
  --bg-elev: #121821;
  --border: #1e2a36;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #22d3ee;
  --accent-deep: #06b6d4;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --maxw: 1600px;
  --maxw-prose: 960px;
  --site-header-h: 60px;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display:
    'Space Grotesk', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Fluid type scale */
  --fs-hero: clamp(30px, 5vw, 52px);
  --fs-h1: clamp(27px, 3.4vw, 40px);
  --fs-h2: clamp(21px, 2.4vw, 28px);
  --fs-h3: clamp(18px, 1.7vw, 21px);
  --fs-body: clamp(15px, 0.4vw + 14px, 17px);
  --fs-small: 13px;
  --lh-tight: 1.15;
  --lh-body: 1.7;

  /* Elevation */
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-2: 0 8px 24px rgba(0, 0, 0, 0.4);

  /* Z-index layers */
  --z-header: 10;
  --z-overlay: 60;
  --z-drawer: 70;

  /* Aurora layout accents (dark-only, gradient) */
  --accent-2: #d946ef;
  --accent-2-deep: #a21caf;
  --gradient: linear-gradient(135deg, var(--accent), var(--accent-2));
  --gradient-soft: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 16%, transparent),
    color-mix(in srgb, var(--accent-2) 14%, transparent)
  );
  --gradient-deep:
    radial-gradient(
      120% 140% at 85% 15%,
      color-mix(in srgb, var(--accent-2-deep) 40%, transparent),
      transparent 60%
    ),
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--accent-deep) 28%, var(--bg)),
      color-mix(in srgb, var(--accent-2-deep) 22%, var(--bg))
    );
  --glow:
    0 10px 30px color-mix(in srgb, var(--accent) 12%, transparent), 0 0 0 1px var(--accent-soft);
  --pill-bg: color-mix(in srgb, var(--accent) 12%, transparent);

  /* Shared rendered-content semantics */
  --content-code-bg: #0d1117;
  --content-success: #3fb950;
  --content-important: #c084fc;
  --content-important-soft: color-mix(in srgb, var(--content-important) 10%, transparent);
  --content-warning: #f5a623;
  --content-warning-soft: color-mix(in srgb, var(--content-warning) 10%, transparent);
  --content-danger: #ff8080;
  --content-danger-soft: color-mix(in srgb, var(--content-danger) 10%, transparent);
  --content-code-action-h: 32px;
  --content-table-min: 32rem;

  /* Shared image and diagram viewer */
  --media-viewer-backdrop: color-mix(in srgb, var(--bg) 94%, transparent);
  --media-viewer-control-bg: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  --media-viewer-control-size: 44px;

  /* Bounded public pagination */
  --pagination-control-size: 44px;

  /* Persistent header activity */
  --header-activity-h: 2px;
  --header-compile-segment: 28%;
  --header-compile-duration: 720ms;
  --header-complete-duration: 320ms;

  /* Progressive route navigation */
  --route-skeleton-bg: color-mix(in srgb, var(--bg-elev) 82%, var(--border));
  --route-skeleton-highlight: color-mix(in srgb, var(--accent) 16%, var(--bg-elev));
  --route-skeleton-line-h: 1rem;
  --route-skeleton-title-h: 3rem;
  --route-skeleton-min-h: 65vh;
}

/*
 * Theme: Nova (blue → magenta). Dark-only accent variant selected via
 * <html data-theme="nova">. The high-specificity `html[data-theme]` selector
 * intentionally outranks the per-site inline `:root{--accent}` override emitted
 * by the document shell. Only the accent hex vars are set here; --accent-soft,
 * --gradient, --gradient-soft, --gradient-deep, --glow, and --pill-bg all derive
 * from them. Add a new theme by copying this block with a new data-theme value.
 */
html[data-theme='nova'] {
  --accent: #3b82f6;
  --accent-deep: #2563eb;
  --accent-2: #d946ef;
  --accent-2-deep: #a21caf;
}

/*
 * Notes owns a fixed light presentation declared by its manifest. Every governed
 * color and spacing value resolves from shared theme tokens; this layer only
 * re-points those tokens at the app's paper-and-ink scheme.
 */
:root {
  color-scheme: light;
  --bg: #f4f2ee;
  --bg-elev: #fbfaf7;
  --border: #ddd8cf;
  --text: #1f1d1a;
  --muted: #5d574e;
  --accent: #a4303f;
  --accent-deep: #7f2432;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
  --accent-2: #0f766e;
  --accent-2-deep: #0b5a54;
  --shadow-1: 0 1px 2px color-mix(in srgb, var(--text) 10%, transparent);
  --shadow-2: 0 12px 30px color-mix(in srgb, var(--text) 12%, transparent);
  --notes-measure: 46rem;
}

* {
  box-sizing: border-box;
}
html {
  background: var(--bg);
}
body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}

.skip-link {
  position: fixed;
  z-index: var(--z-overlay);
  top: var(--space-3);
  left: max(var(--space-3), env(safe-area-inset-left));
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  transform: translateY(calc(-100% - var(--space-5)));
  transition: transform 160ms ease;
}
.skip-link:focus {
  transform: translateY(0);
}

.notes-shell {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-height: 100vh;
  min-height: 100svh;
}
/* Faint ruled paper, drawn behind the content and never over it. */
.notes-shell::before {
  content: '';
  position: absolute;
  z-index: 0;
  inset: 0;
  background-image: repeating-linear-gradient(
    180deg,
    color-mix(in srgb, var(--text) 5%, transparent) 0,
    color-mix(in srgb, var(--text) 5%, transparent) 1px,
    transparent 1px,
    transparent var(--space-6)
  );
  opacity: 0.55;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, var(--text), transparent 88%);
  mask-image: linear-gradient(to bottom, var(--text), transparent 88%);
}
.notes-main,
.notes-footer {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.notes-frame {
  width: min(100%, calc(var(--maxw-prose) + var(--space-8) + var(--space-8)));
  margin: 0 auto;
  padding-left: max(var(--space-5), env(safe-area-inset-left));
  padding-right: max(var(--space-5), env(safe-area-inset-right));
}

.notes-main {
  display: flex;
  align-items: center;
  padding: var(--space-8) 0;
}
.notes-canvas {
  display: grid;
  align-items: center;
  gap: var(--space-7);
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
}

.notes-intro {
  min-width: 0;
  max-width: var(--notes-measure);
}
.notes-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-5);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.notes-status-dot {
  flex: 0 0 auto;
  width: var(--space-2);
  height: var(--space-2);
  border-radius: 50%;
  background: var(--accent);
}
.notes-title {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}
.notes-rule {
  width: var(--space-8);
  height: 3px;
  margin: var(--space-5) 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.notes-lead {
  margin: 0;
  max-width: 44ch;
  color: var(--muted);
  font-size: var(--fs-h3);
  line-height: var(--lh-body);
}

.notes-art {
  display: flex;
  justify-content: flex-start;
  min-width: 0;
}
.notes-mark {
  width: min(100%, calc(var(--space-8) * 2.4));
  height: auto;
  filter: drop-shadow(var(--shadow-1));
}

.notes-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-5) 0;
  color: var(--muted);
  font-size: var(--fs-small);
}
.notes-build-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
}
.notes-build-bar time {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.notes-build-label {
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

@media (min-width: 900px) {
  .notes-canvas {
    align-items: center;
    gap: var(--space-8);
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
  .notes-art {
    justify-content: flex-end;
  }
}

@media (max-width: 560px) {
  .notes-main {
    padding: var(--space-7) 0;
  }
  .notes-lead {
    font-size: var(--fs-body);
  }
  .notes-build-bar {
    flex-direction: column;
    gap: var(--space-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .skip-link {
    transition: none;
  }
}

@media (forced-colors: active) {
  .notes-shell::before,
  .notes-mark {
    display: none;
  }
  .notes-rule {
    background: CanvasText;
  }
}