:root {
  color-scheme: light dark;
  --font-size: 15px;
  --bg: #eef3f8;
  --surface: #ffffff;
  --surface-soft: #f6f8fb;
  --surface-raised: #ffffff;
  --text: #152033;
  --text-muted: #637083;
  --border: #d5deea;
  --border-strong: #b9c6d8;
  --brand: #0d6b53;
  --brand-strong: #075443;
  --brand-soft: #e4f3ed;
  --on-brand: #ffffff;
  --accent: #174f8a;
  --danger: #b42318;
  --warning: #9a6700;
  --success: #087443;
  --shadow: 0 18px 50px rgba(33, 54, 79, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --header-height: 72px;
}

html[data-theme="dark"] {
  --bg: #0c1420;
  --surface: #111d2c;
  --surface-soft: #162437;
  --surface-raised: #172538;
  --text: #edf3fa;
  --text-muted: #a7b5c8;
  --border: #2a3b51;
  --border-strong: #41556f;
  --brand: #67d4ad;
  --brand-strong: #8ae4c2;
  --brand-soft: #183d35;
  --on-brand: #071a14;
  --accent: #7eb7f0;
  --danger: #ff8a80;
  --warning: #f7c85f;
  --success: #6dd6a3;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}


/* v7.1.0-hotfix.34 · Temas visuales SIGDU Viewer + tema original del Chat.
   El modo claro/oscuro permanece independiente mediante data-theme. */
html[data-theme-preset="arkiva-clean"] { --brand:#2563eb; --brand-strong:#1d4ed8; --brand-soft:#dbeafe; --accent:#38bdf8; --on-brand:#fff; }
html[data-theme-preset="mediterraneo"] { --brand:#0f766e; --brand-strong:#115e59; --brand-soft:#ccfbf1; --accent:#d97706; --on-brand:#fff; }
html[data-theme-preset="cobalto"] { --brand:#1d4ed8; --brand-strong:#1e40af; --brand-soft:#dbeafe; --accent:#0891b2; --on-brand:#fff; }
html[data-theme-preset="esmeralda"] { --brand:#15803d; --brand-strong:#166534; --brand-soft:#dcfce7; --accent:#059669; --on-brand:#fff; }
html[data-theme-preset="amatista"] { --brand:#7c3aed; --brand-strong:#6d28d9; --brand-soft:#ede9fe; --accent:#c026d3; --on-brand:#fff; }
html[data-theme-preset="carbono"] { --brand:#475569; --brand-strong:#334155; --brand-soft:#e2e8f0; --accent:#64748b; --on-brand:#fff; }
html[data-theme-preset="nocturno-neon"] { --brand:#06b6d4; --brand-strong:#0891b2; --brand-soft:#0f2530; --accent:#a855f7; --on-brand:#031217; }
html[data-theme-preset="alto-contraste"] { --brand:#0057ff; --brand-strong:#003db5; --brand-soft:#e8f0ff; --accent:#9a6200; --on-brand:#fff; }

html:not([data-theme="dark"])[data-theme-preset="mediterraneo"] { --bg:#edf5f1; --surface:#fffdfa; --surface-soft:#f0f5f1; --surface-raised:#fffdfa; --text:#17312e; --text-muted:#667b76; --border:#cddbd6; --border-strong:#9eb7af; }
html:not([data-theme="dark"])[data-theme-preset="cobalto"] { --bg:#eaf1fb; --surface:#fbfdff; --surface-soft:#edf4fc; --surface-raised:#fff; --text:#14284a; --text-muted:#647795; --border:#cdd9ea; --border-strong:#9fb3cf; }
html:not([data-theme="dark"])[data-theme-preset="esmeralda"] { --bg:#eaf5ef; --surface:#fbfefc; --surface-soft:#edf7f1; --surface-raised:#fff; --text:#173528; --text-muted:#637a6c; --border:#c9ddd1; --border-strong:#9ebca8; }
html:not([data-theme="dark"])[data-theme-preset="amatista"] { --bg:#f1ecf8; --surface:#fff; --surface-soft:#f3eef9; --surface-raised:#fff; --text:#302242; --text-muted:#776888; --border:#ddd2e9; --border-strong:#b9a8ce; }
html:not([data-theme="dark"])[data-theme-preset="carbono"] { --bg:#e8ebef; --surface:#fbfbfc; --surface-soft:#eceff2; --surface-raised:#fff; --text:#202832; --text-muted:#68717c; --border:#cfd5dc; --border-strong:#aeb7c1; }
html:not([data-theme="dark"])[data-theme-preset="nocturno-neon"] { --bg:#050a13; --surface:#0d1829; --surface-soft:#091423; --surface-raised:#101c2e; --text:#eaf9ff; --text-muted:#91a9c0; --border:rgba(94,234,212,.22); --border-strong:rgba(94,234,212,.55); --shadow:0 24px 65px rgba(0,0,0,.46); color-scheme:dark; }
html:not([data-theme="dark"])[data-theme-preset="alto-contraste"] { --bg:#fff; --surface:#fff; --surface-soft:#f3f4f6; --surface-raised:#fff; --text:#000; --text-muted:#303030; --border:#000; --border-strong:#000; --shadow:none; }

html[data-theme="dark"][data-theme-preset="arkiva-clean"] { --brand:#60a5fa; --brand-strong:#93c5fd; --brand-soft:#172554; --accent:#7dd3fc; --on-brand:#071525; }
html[data-theme="dark"][data-theme-preset="mediterraneo"] { --brand:#5eead4; --brand-strong:#99f6e4; --brand-soft:#123b38; --accent:#fbbf24; --on-brand:#062521; }
html[data-theme="dark"][data-theme-preset="cobalto"] { --brand:#60a5fa; --brand-strong:#93c5fd; --brand-soft:#172554; --accent:#67e8f9; --on-brand:#071525; }
html[data-theme="dark"][data-theme-preset="esmeralda"] { --brand:#4ade80; --brand-strong:#86efac; --brand-soft:#13351f; --accent:#6ee7b7; --on-brand:#082414; }
html[data-theme="dark"][data-theme-preset="amatista"] { --brand:#a78bfa; --brand-strong:#c4b5fd; --brand-soft:#2e1c4f; --accent:#f0abfc; --on-brand:#1e1034; }
html[data-theme="dark"][data-theme-preset="carbono"] { --brand:#cbd5e1; --brand-strong:#e2e8f0; --brand-soft:#293341; --accent:#94a3b8; --on-brand:#111827; }
html[data-theme="dark"][data-theme-preset="nocturno-neon"] { --brand:#22d3ee; --brand-strong:#67e8f9; --brand-soft:#0d3340; --accent:#c084fc; --on-brand:#031217; }
html[data-theme="dark"][data-theme-preset="alto-contraste"] { --bg:#000; --surface:#000; --surface-soft:#090909; --surface-raised:#101010; --text:#fff; --text-muted:#f0f0f0; --border:#fff; --border-strong:#fff; --brand:#7dd3fc; --brand-strong:#bae6fd; --brand-soft:#082f49; --accent:#fde047; --on-brand:#000; --shadow:none; }