/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #f5f5f5;
  --surface:   #ffffff;
  --surface2:  #f0f0f0;
  --border:    #d0d0d0;
  --accent:    #2563eb;
  --accent2:   #1d4ed8;
  --text:      #1a1a1a;
  --text-muted:#6b6b6b;
  --radius:    10px;
  --shadow:    0 4px 24px rgba(0,0,0,.08);
  --danger:    #dc2626;
  --success:   #16a34a;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── App Shell ────────────────────────────────────────────── */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Screen toggle ────────────────────────────────────────── */
.screen { display: flex; flex-direction: column; min-height: 100vh; }
.screen.hidden { display: none; }

/* ── Header ───────────────────────────────────────────────── */
.header {
  background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
  border-bottom: 1px solid var(--border);
  padding: 28px 24px 22px;
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
}

.header-inner--app {
  display: flex;
  flex-direction: column;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
  line-height: 1;
}

.logo h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--accent);
}

.subtitle {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.3px;
}

/* ── Back button ──────────────────────────────────────────── */
.back-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px 12px;
  transition: color .2s, background .2s;
  flex-shrink: 0;
}

.back-btn:hover {
  background: var(--surface);
  color: var(--accent);
}

/* ── Main ─────────────────────────────────────────────────── */
.main {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 32px auto;
  padding: 0 20px;
}

/* ── Landing main ─────────────────────────────────────────── */
.landing-main {
  max-width: 860px;
}

/* ── Database loading state ───────────────────────────────── */
.db-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 80px 20px;
  color: var(--text-muted);
}

.db-loading.hidden { display: none; }

/* ── Database grid ────────────────────────────────────────── */
.db-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.db-grid.hidden { display: none; }

.db-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  transition: border-color .2s, background .2s, transform .15s;
}

.db-card:hover {
  background: var(--surface2);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.db-card-icon {
  font-size: 2rem;
  flex-shrink: 0;
  line-height: 1;
}

.db-card-info {
  flex: 1;
  min-width: 0;
}

.db-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.db-card-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.db-card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.db-card-arrow {
  color: var(--accent);
  font-size: 1.2rem;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity .2s;
}

.db-card:hover .db-card-arrow {
  opacity: 1;
}

/* ── Toolbar ──────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.search-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  padding: 10px 16px;
  outline: none;
  transition: border-color .2s;
}

.search-input::placeholder { color: var(--text-muted); }

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.add-btn {
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 16px;
  transition: background .2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.add-btn:hover {
  background: var(--accent2);
}

.count-badge {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 4px 12px;
  white-space: nowrap;
}

/* ── Table Wrapper ────────────────────────────────────────── */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: auto;
}

/* ── Table ────────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.data-table thead tr {
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.data-table th {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.6px;
  padding: 12px 16px;
  text-align: left;
  text-transform: uppercase;
  white-space: nowrap;
}

.col-num   { width: 48px; text-align: center; }
.col-actions { width: 100px; text-align: center; }

.data-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .15s;
}

.data-table tbody tr:last-child { border-bottom: none; }

.data-table tbody tr:hover { background: var(--surface2); }

.data-table td {
  padding: 13px 16px;
  vertical-align: middle;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.td-num {
  color: var(--text-muted);
  font-size: 0.8rem;
  text-align: center;
}

.url-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
}

.url-link:hover { text-decoration: underline; }

/* ── Actions ──────────────────────────────────────────────── */
.actions {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.action-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  transition: color .2s;
}

.action-btn:hover {
  color: var(--text);
}

.action-btn.delete:hover {
  color: var(--danger);
}

/* ── Loading Row ──────────────────────────────────────────── */
.loading-row td {
  padding: 48px 16px;
  text-align: center;
  color: var(--text-muted);
}

.loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* ── Spinner ──────────────────────────────────────────────── */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 0 auto 8px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── No Results ───────────────────────────────────────────── */
.no-results td {
  padding: 40px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Error Box ────────────────────────────────────────────── */
.error-box {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #dc2626;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 16px 20px;
}

.error-box.hidden { display: none; }

.error-icon { font-size: 1.3rem; flex-shrink: 0; }

.error-box p { flex: 1; font-size: 0.9rem; }

.error-box button {
  background: #fee2e2;
  border: none;
  border-radius: 6px;
  color: #dc2626;
  cursor: pointer;
  font-size: 0.85rem;
  padding: 6px 14px;
  transition: background .2s;
}

.error-box button:hover { background: #fecaca; }

/* ── Modal ────────────────────────────────────────────────── */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 540px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.8rem;
  line-height: 1;
  padding: 0;
  transition: color .2s;
}

.close-btn:hover {
  color: var(--text);
}

.modal-body {
  padding: 20px 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input,
.form-group select {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
  padding: 10px 12px;
  outline: none;
  transition: border-color .2s;
}

.form-group select[multiple] {
  height: 120px;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

/* Checkbox form group */
.form-group--checkbox {
  display: flex;
  align-items: center;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  color: var(--text);
  font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.btn-primary, .btn-secondary, .btn-danger {
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 10px 20px;
  transition: background .2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent2);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--surface);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn-danger:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.delete-modal .modal-body {
  text-align: center;
}

.delete-modal .form-actions {
  justify-content: center;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 16px 24px;
  text-align: center;
}

.footer strong { color: var(--accent); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 600px) {
  .logo h1 { font-size: 1.5rem; }
  .main { margin: 20px auto; }
  .data-table th, .data-table td { padding: 10px 12px; }
  .toolbar { flex-direction: column; align-items: stretch; }
  .add-btn { justify-content: center; }
  .db-grid { grid-template-columns: 1fr; }
}