:root {
  --primary: #2A9D8F;
  --primary-dark: #238B7E;
  --primary-light: #E6F5F3;
  --accent: #264653;
  --bg: #f7f9fb;
  --card: #ffffff;
  --text: #264653;
  --text-light: #6b7f8d;
  --border: #e0e7ec;
  --radius: 10px;
  --danger: #ef4444;
  --danger-dark: #dc2626;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); }

/* Header */
.header { background: var(--card); border-bottom: 2px solid var(--primary); padding: 14px 32px; display: flex; align-items: center; gap: 14px; }
.header img { height: 36px; }
.header .brand { font-size: 0.85rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); }
.header .divider { width: 1px; height: 24px; background: var(--border); }
.header .title { font-size: 0.95rem; font-weight: 500; color: var(--text-light); }
.header .spacer { flex: 1; }
.header .logout-btn { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 6px 14px; font-size: 0.8rem; color: var(--text-light); cursor: pointer; text-decoration: none; }
.header .logout-btn:hover { border-color: var(--danger); color: var(--danger); }

.container { max-width: 1000px; margin: 32px auto; padding: 0 32px; }

/* Cards */
.card { background: var(--card); border-radius: var(--radius); padding: 24px; margin-bottom: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.card h2 { font-size: 1rem; font-weight: 600; margin-bottom: 16px; color: var(--accent); }

/* Upload */
.upload-zone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 48px 40px; text-align: center; cursor: pointer; transition: border-color 0.2s, background 0.2s; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 6px; }
.upload-zone .filetypes { font-size: 0.8rem; color: #9aafbb; }
.upload-zone input[type=file] { display: none; }
.upload-row { display: flex; gap: 10px; align-items: center; margin-top: 14px; }
.upload-row input[type=text] { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem; color: var(--text); }
.upload-row input[type=text]:focus { outline: none; border-color: var(--primary); }

/* Buttons */
.btn { padding: 10px 24px; background: var(--primary); color: white; border: none; border-radius: 6px; cursor: pointer; font-size: 0.9rem; transition: background 0.2s; }
.btn:hover { background: var(--primary-dark); }
.btn:disabled { background: var(--border); cursor: not-allowed; color: var(--text-light); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: var(--danger-dark); }
.btn-outline { background: none; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); color: var(--text-light); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.5px; }
td { padding: 12px; border-bottom: 1px solid #f0f3f5; }
tr:hover td { background: var(--bg); }
td code { font-size: 0.85rem; color: var(--accent); background: var(--bg); padding: 2px 6px; border-radius: 4px; }
.actions { display: flex; gap: 6px; }
.empty-row td { text-align: center; color: var(--text-light); padding: 48px; }
.chunk-badge { background: var(--primary-light); color: var(--primary-dark); padding: 3px 10px; border-radius: 10px; font-size: 0.8rem; font-weight: 500; }

/* Status messages */
.status { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 0.9rem; display: none; border: 1px solid transparent; }
.status.ok { background: #ecfdf5; color: #065f46; border-color: var(--primary); display: block; }
.status.err { background: #fef2f2; color: #991b1b; border-color: var(--danger); display: block; }

/* Modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(38,70,83,0.4); z-index: 100; justify-content: center; align-items: center; }
.modal-overlay.active { display: flex; }
.modal { background: var(--card); border-radius: var(--radius); width: 90%; max-width: 720px; max-height: 80vh; display: flex; flex-direction: column; }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { font-size: 0.95rem; color: var(--accent); }
.modal-close { background: none; border: none; font-size: 20px; cursor: pointer; color: var(--text-light); padding: 4px 8px; }
.modal-close:hover { color: var(--accent); }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-body pre { white-space: pre-wrap; word-wrap: break-word; font-size: 0.85rem; line-height: 1.7; font-family: inherit; color: var(--text); }

/* Query */
.query-row { display: flex; gap: 10px; }
.query-row input { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem; color: var(--text); }
.query-row input:focus { outline: none; border-color: var(--primary); }
.query-results { margin-top: 16px; }
.query-result { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px; margin-bottom: 10px; font-size: 0.85rem; line-height: 1.6; }
.query-result .score { font-size: 0.8rem; color: var(--primary-dark); font-weight: 600; margin-bottom: 6px; }
.query-result .source { font-size: 0.75rem; color: var(--text-light); margin-top: 8px; }

/* Spinner */
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: middle; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Login */
.login-container { max-width: 420px; margin: 120px auto; padding: 0 32px; }
.login-container .card { text-align: center; }
.login-container img { height: 48px; margin-bottom: 16px; }
.login-container h1 { font-size: 1.1rem; font-weight: 600; color: var(--accent); margin-bottom: 8px; }
.login-container p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 20px; }
.token-input { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem; font-family: monospace; color: var(--text); }
.token-input:focus { outline: none; border-color: var(--primary); }
.login-btn { width: 100%; margin-top: 12px; }
.error { color: var(--danger); font-size: 0.85rem; margin-top: 12px; }