:root{--ink:#1d1c24;--muted:#74717f;--primary:#29264a;--accent:#7c6cf2;--lav:#b9b0ff;--bg:#f7f4f0;--surface:#fff;--line:#e8e5eb;--shadow:0 8px 28px rgba(41,38,74,.07)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'Noto Sans KR','DM Sans',sans-serif}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer}.app-shell{min-height:100vh;max-width:760px;margin:auto;padding-bottom:92px}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:rgba(247,244,240,.9);position:sticky;top:0;z-index:5;backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:9px;font-family:'DM 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span:not(.ai-tag){font-size:12px;color:var(--muted)}.message-list{min-height:390px;padding:18px 0}.day-divider{text-align:center;color:var(--muted);font-size:11px;margin-bottom:18px}.bubble{max-width:78%;padding:12px 14px;border-radius:16px;margin:9px 0;font-size:14px;line-height:1.55}.bubble small{display:block;font-size:10px;color:var(--muted);margin-top:4px}.bubble.theirs{background:#fff;border-top-left-radius:4px}.bubble.mine{background:#e9e4ff;margin-left:auto;border-top-right-radius:4px}.composer{display:flex;gap:8px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:7px 7px 7px 15px}.composer input{flex:1;border:0;outline:0;background:transparent;min-width:0;font-size:13px}.composer button{width:36px;height:36px;border-radius:11px;background:var(--primary);color:#fff;font-size:20px}.ai-disclosure{text-align:center;color:var(--muted);font-size:10px;margin:13px 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