:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --ink: #181b20;
  --muted: #5f6875;
  --line: #d8dde6;
  --accent: #1f5eff;
  --danger: #c63f2f;
  --success: #1d7a43;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
}

button.secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
}

textarea {
  min-height: 130px;
  resize: vertical;
}

pre {
  margin: 0;
  overflow: auto;
  background: #0f1318;
  color: #dfe6ef;
  padding: 14px;
  border-radius: 10px;
  font-size: 0.85rem;
}

.hidden { display: none !important; }

.app-shell {
  min-height: 100vh;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(460px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
}

.admin-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 18px;
}

.topbar,
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

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

.session-summary {
  color: var(--muted);
  font-size: 0.92rem;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 { font-size: 1.9rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; }

.muted {
  margin: 8px 0 0;
  color: var(--muted);
}

.error {
  margin: 12px 0 0;
  color: var(--danger);
  min-height: 1.2em;
}

.message {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}

.message.success {
  border-color: #b8e3c7;
  color: var(--success);
  background: #f2fbf5;
}

.message.error {
  border-color: #efc2bb;
  color: var(--danger);
  background: #fff5f3;
}

.card,
.simple-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.card {
  display: grid;
  gap: 16px;
}

.stacked {
  display: grid;
  gap: 12px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.inline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox input {
  width: auto;
}

.list-stack {
  display: grid;
  gap: 10px;
}

.list-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  background: #fff;
  display: grid;
  gap: 8px;
}

.list-item.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.list-item-title {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #eef3ff;
  color: var(--accent);
}

.empty-state {
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: #fafbfc;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.stat-card .value {
  margin-top: 8px;
  font-size: 1.8rem;
  font-weight: 700;
}

@media (max-width: 960px) {
  .admin-shell {
    padding: 16px;
  }

  .topbar,
  .section-header,
  .topbar-actions,
  .grid-2,
  .grid-3,
  .stats-grid,
  .inline-grid {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}