:root {
  --bg: #f4f6fb;
  --surface: #fff;
  --text: #1a1d26;
  --muted: #6b7280;
  --accent: #4d6bfe;
  --border: #e5e8f0;
  --danger: #e5484d;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
  background:
    radial-gradient(circle at top left, rgba(77, 107, 254, 0.18), transparent 40%),
    var(--bg);
}

.login-card {
  width: min(400px, 100%);
  background: var(--surface);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 16px 40px rgba(26, 29, 38, 0.1);
  display: grid;
  gap: 0.85rem;
}

.login-card h1 {
  margin: 0;
  color: var(--accent);
}

.login-card p {
  margin: 0;
  color: var(--muted);
}

.login-card label,
.form-grid label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.login-card input,
.form-grid input,
.form-grid select,
.form-grid textarea,
.tab__head input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.login-card button,
.btn {
  border: 0;
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 600;
}

.btn--ghost {
  background: #eef1f8;
  color: var(--text);
}

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

.admin-view {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #121526;
  color: #fff;
  padding: 1.25rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sidebar__brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: #8ea2ff;
  padding: 0.5rem 0.75rem 1rem;
}

.side-btn {
  border: 0;
  background: transparent;
  color: #c9d0e8;
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  cursor: pointer;
  font: inherit;
}

.side-btn.is-active,
.side-btn:hover {
  background: rgba(77, 107, 254, 0.25);
  color: #fff;
}

.side-btn--muted { margin-top: auto; color: #9aa3bf; }

.admin-main {
  padding: 1.5rem;
}

.tab__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.tab__head h2 { margin: 0; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: 0 8px 24px rgba(26, 29, 38, 0.06);
}

.stat-card span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
}

.stat-card strong {
  font-size: 1.5rem;
}

.table-wrap {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: auto;
  box-shadow: 0 8px 24px rgba(26, 29, 38, 0.06);
}

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

th, td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 0.92rem;
}

th { color: var(--muted); font-weight: 600; }

.actions {
  display: flex;
  gap: 0.4rem;
}

.actions button {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

.actions .danger { color: var(--danger); }

.code-box {
  background: #121526;
  color: #d7ddf2;
  border-radius: 12px;
  padding: 1rem;
  overflow: auto;
  min-height: 80px;
  white-space: pre-wrap;
  font-size: 0.85rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  background: var(--surface);
  padding: 1.25rem;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(26, 29, 38, 0.06);
}

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

.form-actions {
  display: flex;
  gap: 0.6rem;
}

.pager {
  display: flex;
  gap: 0.4rem;
  margin-top: 1rem;
}

.pager button {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

@media (max-width: 860px) {
  .admin-view { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; }
  .side-btn--muted { margin-top: 0; }
  .form-grid { grid-template-columns: 1fr; }
}