/* =============================================================================
   Research Data Collection — Admin UI
   Dark theme, responsive, no external font CDNs (system stack with character)
   ============================================================================= */

:root {
  --bg: #0e1218;
  --bg-elev: #151b24;
  --bg-elev-2: #1c2430;
  --border: #2a3544;
  --border-soft: #223042;
  --text: #e8eef6;
  --muted: #8b9bb0;
  --accent: #3d9cfd;
  --accent-dim: rgba(61, 156, 253, 0.15);
  --ok: #3ecf8e;
  --warn: #e6b84d;
  --danger: #e85d6a;
  --radius: 10px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", "Helvetica Neue", ui-sans-serif, sans-serif;
  --mono: "Cascadia Code", "Consolas", "Liberation Mono", monospace;
  --max: 1400px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 15px;
}

body {
  margin: 0;
  font-family: var(--font);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(61, 156, 253, 0.12), transparent 50%),
    radial-gradient(900px 500px at 100% 0%, rgba(62, 207, 142, 0.06), transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.45;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.muted {
  color: var(--muted);
}

.center {
  text-align: center;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.btn:hover {
  background: #243041;
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: #061018;
}

.btn-primary:hover {
  background: #5aadff;
  color: #061018;
}

.btn-ghost {
  background: transparent;
}

.btn-danger {
  background: var(--danger);
  border-color: transparent;
  color: #1a0608;
}

.btn-danger:hover {
  background: #f07882;
  color: #1a0608;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ----- Alerts ----- */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.alert-error {
  background: rgba(232, 93, 106, 0.15);
  border: 1px solid rgba(232, 93, 106, 0.4);
  color: #ffb3bb;
}

.alert-warn {
  background: rgba(230, 184, 77, 0.12);
  border: 1px solid rgba(230, 184, 77, 0.35);
  color: #f0d48a;
}

.alert-ok {
  background: rgba(62, 207, 142, 0.12);
  border: 1px solid rgba(62, 207, 142, 0.35);
  color: #9aebc4;
}

/* ----- Login ----- */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.login-brand {
  text-align: center;
  margin-bottom: 1.5rem;
}

.login-brand h1 {
  margin: 0.75rem 0 0.25rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 48px;
  height: 48px;
  margin: 0 auto;
  border-radius: 14px;
  background:
    linear-gradient(135deg, var(--accent) 0%, #2ee6a8 100%);
  box-shadow: 0 8px 24px rgba(61, 156, 253, 0.35);
}

.brand-mark.sm {
  width: 36px;
  height: 36px;
  margin: 0;
  border-radius: 10px;
}

.login-form label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.75rem 0 0.35rem;
}

.login-form input[type="password"],
.login-form input[type="text"],
.filter-form input[type="date"],
.filter-form input[type="search"] {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.login-form input:focus,
.filter-form input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.login-form .btn {
  margin-top: 1.25rem;
}

/* ----- Top bar ----- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(14, 18, 24, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-title {
  display: block;
  font-size: 1rem;
}

.topbar-sub {
  font-size: 0.8rem;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

/* ----- Stats ----- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.tag-stat .stat-value {
  color: var(--ok);
}

/* ----- Filters ----- */
.filter-bar {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: flex-end;
}

.filter-row + .filter-row {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-soft);
}

.filter-form label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.filter-form label.grow {
  flex: 1 1 220px;
}

.checkbox-label {
  flex-direction: row !important;
  align-items: center;
  gap: 0.4rem !important;
  color: var(--text) !important;
  font-size: 0.9rem !important;
  cursor: pointer;
  user-select: none;
}

.filter-caption {
  color: var(--muted);
  font-size: 0.85rem;
  align-self: center;
}

.filter-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-left: auto;
}

/* ----- Bulk bar ----- */
.bulk-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  background: rgba(232, 93, 106, 0.1);
  border: 1px solid rgba(232, 93, 106, 0.35);
  border-radius: var(--radius);
}

/* ----- Table ----- */
.table-section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
  white-space: nowrap;
}

.data-table th {
  background: var(--bg-elev-2);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  user-select: none;
  position: sticky;
  top: 0;
}

.data-table th.col-check,
.data-table td.col-check {
  width: 36px;
  cursor: default;
}

.data-table th.sort-asc::after {
  content: " ▲";
  color: var(--accent);
}

.data-table th.sort-desc::after {
  content: " ▼";
  color: var(--accent);
}

.data-table tbody tr {
  cursor: pointer;
  transition: background 0.12s;
}

.data-table tbody tr:hover {
  background: rgba(61, 156, 253, 0.06);
}

.data-table tbody tr.selected {
  background: rgba(61, 156, 253, 0.1);
}

.data-table tbody tr.expanded {
  background: rgba(61, 156, 253, 0.08);
}

.tag-yes {
  color: var(--ok);
  font-weight: 700;
}

.tag-no {
  color: #4a5568;
}

.mono {
  font-family: var(--mono);
  font-size: 0.85rem;
}

.badge-dup {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: rgba(230, 184, 77, 0.15);
  color: var(--warn);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-ok {
  color: var(--muted);
  font-size: 0.8rem;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border-soft);
}

.pagination .pages {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.pagination .page-btn {
  min-width: 2rem;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.pagination .page-btn.active {
  background: var(--accent);
  border-color: transparent;
  color: #061018;
  font-weight: 700;
}

.pagination .page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Detail expand row */
.detail-row td {
  background: var(--bg);
  white-space: normal !important;
  padding: 1rem !important;
  cursor: default;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem 1.25rem;
  font-size: 0.9rem;
}

.detail-grid dt {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

.detail-grid dd {
  margin: 0.15rem 0 0;
  word-break: break-all;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.zip-list {
  margin-top: 1rem;
  max-height: 220px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
}

.zip-list table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.zip-list th,
.zip-list td {
  padding: 0.4rem 0.65rem;
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
}

/* ----- Charts ----- */
.charts-section {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem 1.25rem;
}

.chart-card h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
}

.chart-box {
  width: 100%;
  min-height: 220px;
}

.chart-box svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ----- Health ----- */
.health-section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
}

.health-section h2 {
  margin: 0 0 0.85rem;
  font-size: 1rem;
}

.health-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
  font-size: 0.9rem;
}

.health-grid span {
  display: block;
  font-size: 0.75rem;
  margin-bottom: 0.15rem;
}

/* ----- Modal ----- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
}

.modal-panel {
  position: relative;
  width: min(640px, 100%);
  max-height: 85vh;
  overflow: auto;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.modal-body {
  padding: 1.15rem;
}

/* ----- Responsive ----- */
@media (max-width: 960px) {
  .charts-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .topbar-right {
    width: 100%;
    justify-content: flex-end;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .filter-actions {
    margin-left: 0;
    width: 100%;
  }
}