:root{--app-height: 100vh;--keyboard-inset: 0px;--primary: #4285f4;--primary-100: #e8f0fe;--text: #1a1c1e;--muted: #5f6368;--bg: #fafbff;--surface: #ffffff;--surface-2: #f1f4f9;--border: #dadce0;--chip-subject-bg: #e0f2fe;--chip-subject-fg: #0284c7;--chip-websearch-on-bg: #fef3c7;--chip-websearch-off-bg: #fef9e6;--chip-websearch-fg: #92400e;--chip-thinking-bg: #fce7f3;--chip-thinking-fg: #9f1239;--radius-16: 16px;--radius-12: 12px;--radius-24: 24px}@supports (height: 100dvh){:root{--app-height: 100dvh}}html,body{width:100%;height:var(--app-height);min-height:var(--app-height);overflow:hidden}body{position:fixed;inset:0;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);overscroll-behavior:none}#app{position:fixed;inset:0;width:100%;height:var(--app-height);min-height:0;overflow:hidden}*{box-sizing:border-box}a{color:inherit;text-decoration:none}.btn{appearance:none;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:12px;padding:10px 14px;cursor:pointer;font-weight:600}.btn-primary{border-color:#4285f473;background:var(--primary);color:#fff}.input{width:100%;border:1px solid rgba(218,220,224,.8);border-radius:12px;padding:10px 12px;background:var(--surface);outline:none}.input:focus{border-color:#4285f48c;box-shadow:0 0 0 4px #4285f41f}