:root{--bg: #17212b;--bg-panel: #1c2733;--bg-input: #242f3d;--bg-hover: #2b5278;--bg-active: #2b5278;--bubble-out: #2b5278;--bubble-in: #182533;--text: #ffffff;--text-secondary: #aab8c5;--accent: #64b3ef;--danger: #e17076;--border: #101921;--radius: 12px}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);font-size:15px}button{font-family:inherit;cursor:pointer;border:none;border-radius:8px;background:var(--bg-hover);color:var(--text);padding:10px 16px;font-size:14px;transition:filter .15s}button:hover:not(:disabled){filter:brightness(1.15)}button:disabled{opacity:.5;cursor:default}button.primary{background:var(--accent);color:#10202e;font-weight:600}button.ghost{background:transparent;color:var(--text-secondary)}input,textarea{font-family:inherit;font-size:14px;color:var(--text);background:var(--bg-input);border:1px solid var(--border);border-radius:8px;padding:11px 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