:root{--ckc-bg: #f6f7f9;--ckc-surface: #ffffff;--ckc-ink: #12151a;--ckc-muted: #626b78;--ckc-line: #e6e9ee;--ckc-bot-bubble: #eef0f4;--ckc-danger: #b42318;--ckc-radius: 16px}*,*:before,*:after{box-sizing:border-box}body{margin:0;background:var(--ckc-bg);color:var(--ckc-ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}.ckc-shell{height:100vh;height:100dvh;display:grid;grid-template-rows:auto 1fr auto;background:var(--ckc-bg)}.ckc-center{place-items:center;grid-template-rows:1fr}.ckc-app{height:100vh;height:100dvh;display:flex;flex-direction:column;background:var(--ckc-bg)}.ckc-tab-body{flex:1;min-height:0;display:flex;flex-direction:column}.ckc-tab-body .ckc-shell{height:100%}.ckc-tabbar{display:flex;flex-shrink:0;border-top:1px solid var(--ckc-line);background:var(--ckc-surface)}.ckc-tab-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:7px 4px 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ckc-spin{to{transform:rotate(360deg)}}.ckc-fatal{text-align:center;padding:32px;max-width:320px}.ckc-fatal-icon{font-size:28px;margin-bottom:10px}.ckc-fatal-title{font-size:16px;font-weight:600;margin-bottom:6px}.ckc-fatal-sub{font-size:14px;color:var(--ckc-muted);line-height:1.5}@media (prefers-reduced-motion: reduce){.ckc-typing span,.ckc-spinner{animation:none}.ckc-option:active{transform:none}}@media (prefers-color-scheme: dark){:root{--ckc-bg: #14171c;--ckc-surface: #1c2027;--ckc-ink: #f2f4f7;--ckc-muted: #98a2b3;--ckc-line: #2b313a;--ckc-bot-bubble: #262c35;--ckc-danger: #fda29b}.ckc-error{background:#2a1a19;border-color:#5d2c28}.ckc-option{color:var(--ckc-ink)}.ckc-option-primary{color:#fff;background:var(--ckc-primary, #0b5fff)}}@media (min-width: 640px) and (min-height: 520px){body{display:flex;align-items:center;justify-content:center}.ckc-app{width:100%;max-width:520px;height:min(760px,100dvh);border:1px solid var(--ckc-line);border-radius:18px;overflow:hidden}}