:root {
  color-scheme: light;
  --bg: #fffdfa;
  --panel: #ffffff;
  --line: #e9e5dd;
  --line-strong: #d8d2c8;
  --text: #202124;
  --text-soft: #55514a;
  --muted: #858585;
  --user: #f0f1f2;
  --surface-chat: #f8f7f4;
  --surface-paper: #fffdfa;
  --surface-paper-edge: #efe8d8;
  --surface-user: #eef1ef;
  --surface-selected: #f4ecdb;
  --accent: #222222;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  --paper-shadow: 0 18px 38px rgba(52, 44, 33, 0.08);
  --motion-fast: 120ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --motion-soft: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --motion-spring: 360ms cubic-bezier(0.16, 1, 0.3, 1);
  --motion-press-shadow: 0 8px 22px rgba(31, 28, 23, 0.1);
  --composer-height: 76px;
  --composer-min-height: 66px;
  --composer-font-size: 16px;
  --composer-max-textarea: 74px;
  --send-button-size: 32px;
  --tool-button-size: 26px;
  --font-size: 17px;
  --line-height: 1.5;
  --assistant-left: 12px;
  --message-side-padding: 18px;
  --message-gap: 12px;
  --user-bubble-padding-y: 2px;
  --user-bubble-padding-x: 3px;
  --meta-font-size: 12px;
  --footer-gap: 8px;
  --more-button-size: 28px;
}