:root{--bg: #eff3ee;--bg-accent: #dcebe3;--ink: #161615;--muted: #5e635c;--card: rgba(250, 248, 242, .9);--line: #cfd4cb;--accent: #0f766e;--accent-strong: #0b5c56;--accent-warm: #f28c28;--surface: #ffffff;--surface-soft: #f5f7f3;--danger: #b42318;--shadow: 0 24px 60px rgba(22, 22, 21, .08)}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:Space Grotesk,sans-serif;color:var(--ink);background:radial-gradient(circle at top left,#d6ebe2 0%,transparent 28%),radial-gradient(circle at top right,#ffe0c6 0%,transparent 24%),linear-gradient(180deg,#eef3ee,#e7ede6)}button,input{font:inherit}input{width:100%;min-height:56px;padding:0 16px;border-radius:16px;border:1px solid var(--line);background:#ffffffeb;color:var(--ink);outline:0}input:focus{border-color:var(--accent);box-shadow:0 0 0 4px #0f766e1f}h1,h2,h3,p{margin:0}code{font-family:IBM Plex Mono,monospace}.page{min-height:100vh;display:grid;place-items:center;padding:24px}.shell-page{background:transparent}.shell-card,.login-card,.chat-panel{border:1px solid var(--line);border-radius:28px;background:var(--card);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.kicker{font-family:IBM Plex Mono,monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.lead{color:var(--muted);line-height:1.55}.login-page{display:flex;align-items:center;justify-content:center}.login-box{width:min(450px,100%);padding:40px;border-radius:16px;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow)}.login-box h1{margin:0 0 24px;font-size:24px;font-weight:600;text-align:center}.login-box .login-form{margin-bottom:20px}.login-box .login-divider{margin:20px 0;display:flex;align-items:center;gap:12px}.login-box .login-divider:before,.login-box .login-divider:after{content:"";flex:1;height:1px;background:var(--line)}.login-box .login-divider span{font-size:14px;color:var(--muted)}.login-card h2{font-size:32px}.login-form{display:grid;gap:12px}.login-form label{font-size:14px;color:var(--muted)}.primary-button,.google-button,.ghost-button,.chat-footer button{border:0;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,opacity .16s ease}.primary-button:hover,.google-button:hover,.ghost-button:hover,.chat-footer button:hover{transform:translateY(-1px)}.primary-button:disabled,.google-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.primary-button{width:100%;min-height:58px;padding:14px 18px;border-radius:16px;background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;font-weight:700;box-shadow:0 14px 28px #0f766e33}.google-button{width:100%;min-height:58px;padding:14px 18px;border-radius:16px;background:var(--surface);color:var(--ink);border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;gap:14px;font-weight:700}.google-mark{width:30px;height:30px;border-radius:999px;display:inline-grid;place-items:center;background:linear-gradient(135deg,#fff,#edf1ea);border:1px solid var(--line);color:var(--accent-strong)}.notice{padding:14px 16px;border-radius:16px;font-size:14px;line-height:1.45}.login-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.08em}.login-divider:before,.login-divider:after{content:"";height:1px;flex:1;background:var(--line)}.error-box{color:var(--danger);background:#fff0ee;border:1px solid #f3c9c1;margin-bottom:20px}.hint{color:var(--muted);font-size:14px;line-height:1.5}.chat-layout{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.chat-container{width:100%;height:calc(100vh - 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