/* =====================================================================
   kebab-stack · design tokens v1
   Light, nerdy, kebab. One skewer, many layers.

   Two type faces, each with one job:
     --ks-display   mono, headings & brand   (terminal warmth)
     --ks-ui        system sans, UI chrome
     --ks-mono      mono, values/ids/code

   Primary accent: flame (#E85D2F) — the grill.
   Fresh green for "active/ok" indicators — the salad.
   Default theme: warm paper. Dark theme: charcoal, opt-in via
   [data-theme="dark"] on <html>.
   ===================================================================== */

:root {
  /* ---- Type faces ------------------------------------------------- */
  --ks-display:
    "JetBrains Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo,
    "Cascadia Code", Consolas, monospace;
  --ks-ui:
    "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --ks-mono:
    "JetBrains Mono", ui-monospace, "SF Mono", SFMono-Regular, Menlo,
    "Cascadia Code", Consolas, monospace;

  /* ---- Type scale ------------------------------------------------- */
  --ks-fz-eyebrow: 11px;
  --ks-fz-body: 16px;
  --ks-fz-body-sm: 14px;
  --ks-fz-h3: 20px;
  --ks-fz-h2: 30px;
  --ks-fz-h1: clamp(34px, 5.6vw, 64px);
  --ks-fz-marker: 12px;

  --ks-lh-tight: 1.05;
  --ks-lh-display: 1.18;
  --ks-lh-body: 1.55;
  --ks-lh-meta: 1.4;

  --ks-tracking-display: -0.02em;   /* mono headings, slightly tightened */
  --ks-tracking-h2: -0.015em;
  --ks-tracking-eyebrow: 0.16em;
  --ks-tracking-mono: 0.02em;

  --ks-weight-display: 600;
  --ks-weight-body: 400;
  --ks-weight-ui: 400;
  --ks-weight-ui-strong: 500;

  /* ---- Spacing ---------------------------------------------------- */
  --ks-space-1: 4px;
  --ks-space-2: 8px;
  --ks-space-3: 12px;
  --ks-space-4: 16px;
  --ks-space-5: 24px;
  --ks-space-6: 32px;
  --ks-space-7: 48px;
  --ks-space-8: 64px;
  --ks-space-9: 96px;
  --ks-space-10: 128px;
  --ks-space-section: 120px;

  /* ---- Layout ----------------------------------------------------- */
  --ks-container: 1280px;
  --ks-prose: 720px;
  --ks-gutter: 32px;

  /* ---- Radii ------------------------------------------------------ */
  --ks-radius-inline: 4px;
  --ks-radius-card: 10px;
  --ks-radius-input: 8px;
  --ks-radius-pill: 9999px;

  /* ---- Border weights --------------------------------------------- */
  --ks-rule-w: 1px;
  --ks-card-stripe-w: 3px;

  /* =================================================================
     LIGHT THEME (default: warm paper)
     ================================================================= */

  /* Backgrounds */
  --ks-bg: #fbf8f2;                   /* warm paper */
  --ks-bg-sunk: #f4eee4;              /* sunk panels */
  --ks-bg-elev: #ffffff;              /* raised cards */
  --ks-bg-cta-inverse: #211d17;
  --ks-bg-card: #ffffff;

  /* Grid paper texture (nerd graph paper) */
  --ks-grid-line: rgba(33, 29, 23, 0.05);
  --ks-grid-tile: 24px;

  /* Text */
  --ks-fg: #211d17;                   /* warm charcoal ink */
  --ks-fg-body: #211d17;
  --ks-fg-secondary: #5b5345;
  --ks-fg-muted: #8d8271;
  --ks-fg-disabled: #bbb0a0;
  --ks-fg-inverse: #ffffff;

  /* Rules and borders */
  --ks-rule: #e9e1d3;
  --ks-rule-strong: #5b5345;

  /* Accent: flame */
  --ks-accent: #e85d2f;
  --ks-accent-strong: #c94a22;
  --ks-accent-dim: rgba(232, 93, 47, 0.12);

  /* Section stripes (card top stripes, category coding) */
  --ks-section-default: var(--ks-accent);
  --ks-section-teal: #1f9d6b;          /* the salad */
  --ks-section-blue: #3d6ed0;

  /* Indicators (status dots) */
  --ks-indicator-teal: #21a06e;        /* fresh = active */
  --ks-indicator-rust: var(--ks-accent);

  /* Code surfaces */
  --ks-code-bg: #f3ecdf;
  --ks-code-fg: #211d17;

  /* Focus */
  --ks-focus: #c94a22;
}

/* ===================================================================
   DARK THEME (opt-in): charcoal grill, flame glows brighter.
   Apply on <html data-theme="dark">.
   =================================================================== */

[data-theme="dark"] {
  --ks-bg: #16130e;
  --ks-bg-elev: #201b14;
  --ks-bg-cta-inverse: #ffffff;
  --ks-bg-card: #201b14;
  --ks-bg-sunk: #1d1812;

  --ks-grid-line: rgba(243, 237, 226, 0.05);

  --ks-fg: #f3ede2;
  --ks-fg-body: #f3ede2;
  --ks-fg-secondary: #aba08d;
  --ks-fg-muted: #7e7465;
  --ks-fg-disabled: #4c453b;
  --ks-fg-inverse: #211d17;

  --ks-rule: #2e2820;
  --ks-rule-strong: #6a6152;

  --ks-accent: #ff7a45;
  --ks-accent-strong: #ff8f60;
  --ks-accent-dim: rgba(255, 122, 69, 0.16);

  --ks-section-default: var(--ks-accent);
  --ks-section-teal: #34b57e;
  --ks-section-blue: #6f97e8;

  --ks-indicator-teal: #34b57e;
  --ks-indicator-rust: var(--ks-accent);

  --ks-code-bg: #201b14;
  --ks-code-fg: #f3ede2;

  --ks-focus: var(--ks-accent);
}

/* ===================================================================
   Base element styling
   =================================================================== */

html {
  background: var(--ks-bg);
  color: var(--ks-fg);
  font-family: var(--ks-ui);
  font-size: 16px;
  line-height: var(--ks-lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background: var(--ks-bg);
  color: var(--ks-fg);
}

::selection {
  background: var(--ks-accent);
  color: #ffffff;
}

a {
  color: inherit;
  text-decoration-color: var(--ks-rule-strong);
  text-underline-offset: 3px;
}
a:hover { color: var(--ks-accent); }

:focus-visible {
  outline: 2px solid var(--ks-focus);
  outline-offset: 2px;
}

/* Headings carry the mono display face: the terminal is the brand. */
.ks-prose,
.ks-display,
h1, h2, h3, h4, h5 {
  font-family: var(--ks-display);
  letter-spacing: var(--ks-tracking-display);
}

/* ===================================================================
   Surface utilities
   =================================================================== */

.ks-bg-sunk {
  background: var(--ks-bg-sunk);
}

/* Nerd graph paper: two crossed hairline gradients, 24px tile. */
.ks-grid-paper {
  background-image:
    linear-gradient(90deg, var(--ks-grid-line) 1px, transparent 1px),
    linear-gradient(var(--ks-grid-line) 1px, transparent 1px);
  background-size: var(--ks-grid-tile) var(--ks-grid-tile);
  background-position: -1px -1px;
  background-repeat: repeat;
}

.ks-grid-paper-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.8;
  background-image:
    linear-gradient(90deg, var(--ks-grid-line) 1px, transparent 1px),
    linear-gradient(var(--ks-grid-line) 1px, transparent 1px);
  background-size: var(--ks-grid-tile) var(--ks-grid-tile);
  background-position: -1px -1px;
  background-repeat: repeat;
}

/* The skewer divider: a dotted line with layers on it. Decorative. */
.ks-skewer-rule {
  border: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg,
    var(--ks-rule) 0 12px, transparent 12px 20px);
  position: relative;
}
