:root{--bg: #f7f8fa;--fg: #1a1a1a;--muted: #666;--accent: #216e94;--accent-fg: #fff;--danger: #c0392b;--border: #d8dde3;--ok: linear-gradient(to right, #00b09b, #96c93d);--err: linear-gradient(to right, #f12711, #f5af19);--info: linear-gradient(to right, #9bcedb, #216e94)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg)}.app{max-width:960px;margin:0 auto;padding:24px;min-height:100vh;transition:background-color .15s}.app.dragover{background-color:#216e9414;outline:2px dashed var(--accent);outline-offset:-16px}header{display:flex;justify-content:space-between;align-items:center;gap:16px}h1{margin:0;font-size:1.6rem}.hint{color:var(--muted);margin:4px 0 16px}button{font:inherit;padding:6px 14px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-fg);border-radius:4px;cursor:pointer}button:hover{filter:brightness(1.1)}button.danger{background:var(--danger);border-color:var(--danger)}table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:6px;overflow:hidden}th,td{padding:8px 12px;text-align:left;border-bottom:1px solid var(--border)}tbody tr:last-child td{border-bottom:none}th{background:#eef1f5;font-weight:600}td.empty{text-align:center;color:var(--muted);padding:24px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}hr{border:none;border-top:1px solid var(--border);margin:32px 0}.message-form{display:flex;gap:8px;margin-top:8px}.message-form input{flex:1;font:inherit;padding:6px 10px;border:1px solid var(--border);border-radius:4px}.message-text{background:#fff;border:1px solid var(--border);padding:10px 12px;border-radius:6px;min-height:2em;white-space:pre-wrap}.uploads{list-style:none;padding:0;margin:0 0 16px;display:grid;gap:6px}.uploads li{display:grid;grid-template-columns:1fr 200px 50px;gap:8px;align-items:center;background:#fff;border:1px solid var(--border);padding:6px 10px;border-radius:4px}.upload-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-pct{text-align:right;font-variant-numeric:tabular-nums;color:var(--muted)}progress{width:100%;height:8px}.toasts{position:fixed;top:20px;left:50%;transform:translate(-50%);display:flex;flex-direction:column;gap:8px;z-index:1000;pointer-events:none}.toast{color:#fff;padding:10px 16px;border-radius:6px;box-shadow:0 4px 12px #0003;font-weight:500}.toast.ok{background:var(--ok)}.toast.err{background:var(--err)}.toast.info{background:var(--info)}