/* =========================================================================
   AeroStack — colors & type
   Derived from aerostack/aerostack-features-and-use-cases.html
   Single source of truth for design tokens + semantic styles.
   ========================================================================= */

/* ---------- Fonts ---------- */
/* Inter + JetBrains Mono are NEAREST-MATCH recommendations.
   Source brand uses system fonts only — see README for flag. */
@font-face {
  font-family: "Inter";
  src: url("fonts/Inter-Variable.woff2") format("woff2-variations"),
       url("fonts/Inter-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("fonts/JetBrainsMono-Variable.woff2") format("woff2-variations"),
       url("fonts/JetBrainsMono-Variable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- Primitive tokens ---------- */
:root {
  /* Backgrounds / surfaces */
  --bg:          #05090f;
  --bg-grad-top: #04070d;
  --panel:       #0b1220;
  --panel-2:     #0f1830;
  --panel-3:     #091327;

  /* Borders */
  --border:      #1e2a44;
  --border-soft: #26345a;

  /* Ink */
  --text:        #e7ecf5;
  --ink-2:       #c6cdd9;
  --ink-3:       #dbe4f6;
  --ink-heading: #f1f5fb;
  --ink-strong:  #f7f9ff;
  --muted:       #9aa4b8;
  --meta:        #94a2bd;
  --kv-meta:     #cfdbf0;

  /* Accents */
  --accent:      #7dd3fc;  /* cyan-300, primary brand */
  --accent-2:    #fcd34d;  /* amber-300, highlight */
  --good:        #86efac;  /* green-300 */
  --good-ink:    #b8f5c9;
  --warn:        #fca5a5;  /* red-300 */

  /* Pills — category palette (fg / bg / border) */
  --pill-flagship-fg:     #a7e1ff;
  --pill-flagship-bg:     #0b3b5a;
  --pill-flagship-bd:     #1d5783;

  --pill-revenue-fg:      #e9d5ff;
  --pill-revenue-bg:      #2c1a52;
  --pill-revenue-bd:      #472b73;

  --pill-ai-fg:           #f9c2f0;
  --pill-ai-bg:           #3b0b3b;
  --pill-ai-bd:           #733056;

  --pill-ops-fg:          #b2f1cc;
  --pill-ops-bg:          #0b3a2a;
  --pill-ops-bd:          #1d6b4b;

  --pill-enterprise-fg:   #fcd5a1;
  --pill-enterprise-bg:   #52310b;
  --pill-enterprise-bd:   #7a4e1d;

  --pill-moat-fg:         #f2c4ff;
  --pill-moat-bg:         #2d0b3b;
  --pill-moat-bd:         #562073;

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius:    8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 28px;
  --space-8: 40px;
  --space-10: 48px;
  --space-12: 64px;
  --space-16: 80px;

  /* Typography — families */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
               Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Typography — scale */
  --fs-h1:   2.1rem;    /* ~33.6px */
  --fs-h2:   1.55rem;   /* ~24.8px */
  --fs-h3:   1.18rem;   /* ~18.9px */
  --fs-h4:   1.02rem;   /* ~16.3px */
  --fs-body: 1rem;      /* 16px */
  --fs-sm:   0.93rem;
  --fs-xs:   0.88rem;
  --fs-pill: 0.72rem;

  --lh-tight:  1.2;
  --lh-body:   1.55;

  --tracking-h: -0.01em;
  --tracking-pill: 0.02em;

  /* Shadows — sparing */
  --shadow-pop: 0 12px 40px -12px rgba(0, 0, 0, 0.6);
}

/* ---------- Semantic element styles ---------- */
/* Apply by adding classes; do not rely on element tag selectors in app code. */

.as-bg {
  background: linear-gradient(180deg, var(--bg-grad-top) 0%, var(--bg) 100%);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}

.as-h1, h1.as {
  font-size: var(--fs-h1);
  font-weight: 700;
  letter-spacing: var(--tracking-h);
  line-height: var(--lh-tight);
  color: var(--text);
  margin: 0 0 10px 0;
}
.as-h2, h2.as {
  font-size: var(--fs-h2);
  font-weight: 700;
  letter-spacing: var(--tracking-h);
  line-height: var(--lh-tight);
  color: var(--text);
  padding: 14px 0 10px 0;
  border-bottom: 1px solid var(--border);
  margin-top: var(--space-10);
}
.as-h3, h3.as {
  font-size: var(--fs-h3);
  font-weight: 600;
  color: var(--ink-3);
  margin-top: var(--space-6);
}
.as-h4, h4.as {
  font-size: var(--fs-h4);
  font-weight: 600;
  color: var(--ink-heading);
  margin: 0 0 var(--space-2) 0;
}

.as-body  { color: var(--text); }
.as-body-ink-2 { color: var(--ink-2); }
.as-muted { color: var(--muted); }
.as-meta  { color: var(--meta); font-size: var(--fs-xs); }

.as-link {
  color: var(--accent);
  text-decoration: none;
}
.as-link:hover { text-decoration: underline; }

.as-mono, code.as {
  font-family: var(--font-mono);
  background: #0b1425;
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-size: 0.9em;
}

/* Surfaces */
.as-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.as-panel-2 {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}
.as-hero {
  padding: var(--space-10) 36px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(1200px 420px at 10% -20%, #123 0%, var(--bg) 55%),
    linear-gradient(135deg, #0b1c3b, #0e1833);
  border: 1px solid var(--border);
}

/* Callouts */
.as-callout {
  background: var(--panel-2);
  border-left: 4px solid var(--accent);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius);
  margin: var(--space-4) 0;
}
.as-callout.good { border-left-color: var(--good); }
.as-callout.warn { border-left-color: var(--warn); }

/* Inner strip — "use case" pattern */
.as-usecase {
  margin: 8px 0 0 0;
  padding: 8px 10px 10px 14px;
  border-left: 2px solid var(--border-soft);
  background: var(--panel-3);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.as-usecase b { color: var(--accent-2); font-weight: 600; }

/* Pills */
.as-pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: var(--radius-pill);
  font-size: var(--fs-pill);
  font-weight: 600;
  letter-spacing: var(--tracking-pill);
  line-height: 1.4;
  vertical-align: middle;
  border: 1px solid var(--border);
}
.as-pill.flagship   { background: var(--pill-flagship-bg);   color: var(--pill-flagship-fg);   border-color: var(--pill-flagship-bd); }
.as-pill.revenue    { background: var(--pill-revenue-bg);    color: var(--pill-revenue-fg);    border-color: var(--pill-revenue-bd); }
.as-pill.ai         { background: var(--pill-ai-bg);         color: var(--pill-ai-fg);         border-color: var(--pill-ai-bd); }
.as-pill.ops        { background: var(--pill-ops-bg);        color: var(--pill-ops-fg);        border-color: var(--pill-ops-bd); }
.as-pill.enterprise { background: var(--pill-enterprise-bg); color: var(--pill-enterprise-fg); border-color: var(--pill-enterprise-bd); }
.as-pill.moat       { background: var(--pill-moat-bg);       color: var(--pill-moat-fg);       border-color: var(--pill-moat-bd); }

/* Grid */
.as-grid   { display: grid; gap: var(--space-4); }
.as-grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.as-grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 800px) {
  .as-grid.c2, .as-grid.c3 { grid-template-columns: 1fr; }
}