/* DSH dark surfaces + Hermit brand accents */
:root {
  /* Brand from color card + agent-motion eye */
  --brand: #009cc6;
  --brand-bright: #70cde5;
  --brand-dim: #007a9c;
  --accent: var(--brand);
  --accent-bright: var(--brand-bright);
  --crab: #ffa939;
  --crab-dim: #e8922a;
  --cream: #f9f3ee;
  --eye: #9957ad;
  --send: var(--crab);
  --send-hover: var(--crab-dim);
  --ok: #22c55e;
  --warn: #f59e0b;
  --danger: #f25a5a;

  /* DSH dark bluish neutrals (design-platform.css) */
  --bg: #151517; /* bluish-950 */
  --bg-elev: #1b1b1c; /* bluish-900 sidebar */
  --bg-layer: #232325; /* bluish-875 */
  --bg-card: #2c2c2e; /* bluish-850 input */
  --bg-hover: rgba(255, 255, 255, 0.08);
  --bg-active: rgba(255, 255, 255, 0.14);
  --border-l1: rgba(255, 255, 255, 0.06);
  --border-l2: rgba(255, 255, 255, 0.12);
  --border-l3: rgba(255, 255, 255, 0.16);
  --border-l4: rgba(255, 255, 255, 0.2);
  --border: var(--border-l1);
  --border-2: var(--border-l2);
  --border-3: var(--border-l3);
  --border-4: var(--border-l4);
  --text: #f9fafb;
  --text-dim: #ebf0f4;
  --text-muted: #cfd3d6;
  --text-faint: #adb2b8;
  --text-caption: #81858c;
  --bubble-user: #2c2c2e;

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-panel: 28px;

  --rail-w: 280px;
  --rail-collapsed: 56px;
  --chat-w: 820px;
  --composer-w: 852px; /* chat + 32 */
  --composer-side: 16px;
  --header-h: 52px;
  --new-session-h: 38px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Noto Sans SC", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, Menlo, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --elevation-stroke: 0 0 0 0.5px var(--border-l2);
  /* DSH soft: hairline + very light lift (not heavy drop shadow) */
  --elevation-soft: var(--elevation-stroke), 0 4px 16px rgba(0, 0, 0, 0.03),
    0 0 24px rgba(0, 0, 0, 0.03);
  --sidebar-wash: linear-gradient(
    to bottom,
    rgb(0 156 198 / 0.1),
    rgb(112 205 229 / 0) 38%,
    rgb(153 87 173 / 0) 68%,
    rgb(153 87 173 / 0.07)
  );
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  width: 100%;
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: var(--accent-bright);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 8px;
}