:root {
  color-scheme: dark;
  --bg: #081118;
  --panel: rgba(14, 21, 29, 0.82);
  --panel-strong: rgba(19, 29, 41, 0.94);
  --line: rgba(141, 171, 199, 0.16);
  --text: #e9f1f8;
  --muted: #97a8b9;
  --accent: #7ce0c3;
  --accent-strong: #4db6ff;
  --danger: #ff8a80;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(77, 182, 255, 0.16), transparent 35%),
    radial-gradient(circle at top right, rgba(124, 224, 195, 0.14), transparent 28%),
    linear-gradient(180deg, #050a0f 0%, var(--bg) 60%, #05090d 100%);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.55), transparent 90%);
}

.shell {
  padding: 32px 24px 56px;
}

.topbar, .content {
  width: min(1240px, 100%);
  margin: 0 auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  padding: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 16, 22, 0.84), rgba(7, 12, 16, 0.56));
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 11px;
  color: var(--accent);
  margin-bottom: 12px;
}

h1, h2, p {
  margin: 0;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(30px, 4vw, 56px);
  line-height: 0.96;
}

.panel-head h2,
.metric strong,
.error-card h1 {
  font-family: Georgia, "Times New Roman", serif;
}

.topbar p {
  max-width: 70ch;
  margin-top: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
}

.nav a.active {
  color: var(--text);
  border-color: rgba(124, 224, 195, 0.32);
  background: rgba(124, 224, 195, 0.09);
}

.content {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metric, .panel, .error-card {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 20px;
  box-shadow: 0 14px 48px rgba(0, 0, 0, 0.18);
}

.metric {
  padding: 18px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 30px;
}

.panel {
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-strong);
}

.panel-head h2 {
  font-size: 18px;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  vertical-align: top;
}

th {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

td {
  color: var(--text);
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font: inherit;
}

.empty {
  padding: 18px 20px 22px;
  color: var(--muted);
}

.list {
  list-style: none;
  margin: 0;
  padding: 0 20px 18px;
}

.list li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.list li:last-child {
  border-bottom: 0;
}

.error-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.error-card {
  width: min(720px, 100%);
  padding: 36px;
  text-align: center;
}

.error-card h1 {
  font-size: clamp(48px, 12vw, 120px);
  margin: 0 0 10px;
}

.error-card p {
  color: var(--muted);
  margin-bottom: 18px;
}

.error-card a {
  color: var(--accent-strong);
  text-decoration: none;
}

/* ── Button Styles ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: #6bc8ff;
  border-color: #6bc8ff;
}

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--muted);
  border-color: var(--line);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
}

.btn-danger {
  background: rgba(255, 138, 128, 0.12);
  color: var(--danger);
  border-color: rgba(255, 138, 128, 0.25);
}

.btn-danger:hover {
  background: rgba(255, 138, 128, 0.22);
  border-color: rgba(255, 138, 128, 0.4);
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.75rem;
  border-radius: 4px;
}

.btn-xs {
  padding: 2px 8px;
  font-size: 0.7rem;
  border-radius: 3px;
}

.btn-icon {
  padding: 6px 10px;
  font-size: 0.9rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ── Form Styles ───────────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group-full {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input,
.form-select {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 9px 12px;
  font-size: 0.88rem;
  font-family: inherit;
  transition: border-color 0.15s ease;
  width: 100%;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 3px rgba(77, 182, 255, 0.15);
}

.form-input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.form-help {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
}

.form-checkbox input[type="checkbox"] {
  accent-color: var(--accent-strong);
  width: 16px;
  height: 16px;
}

.form-checkbox label {
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  align-items: center;
}

/* ── Modal Styles ──────────────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  width: min(520px, 90vw);
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 20px;
  font-family: Georgia, "Times New Roman", serif;
}

.modal .modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: flex-end;
}

/* ── Table Actions Column ──────────────────────────────────────── */
.table-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.table-actions form {
  display: inline;
  margin: 0;
}

/* ── Empty State ───────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--muted);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.9rem;
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .topbar {
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .shell {
    padding: 18px 14px 34px;
  }

  .topbar {
    padding: 18px;
  }

  .metrics {
    grid-template-columns: 1fr;
  }

  th, td {
    padding: 12px 14px;
  }
}