:root {
  --bg: #0f0f0f;
  --surface: #161616;
  --surface-2: #1d1d1d;
  --border: #262626;
  --border-strong: #3a3a3a;
  --text: #e4e4e7;
  --muted: #a1a1aa;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
  --info: #0ea5e9;
  --radius: 8px;
  --radius-sm: 4px;
  --gap: 12px;
  --gap-lg: 20px;
  --max-width: 1200px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 0.5em; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }

p { margin: 0 0 0.5em; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.mono { font-family: var(--mono); }

/* ---------- Layout ---------- */

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  flex-shrink: 0;
}
.sidebar-brand {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a {
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.sidebar-nav a:hover { background: var(--surface-2); text-decoration: none; }
.sidebar-nav a.active { background: var(--surface-2); color: var(--primary); }
.sidebar-foot {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}

.content {
  flex: 1;
  padding: 24px 28px;
  max-width: var(--max-width);
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  gap: 16px;
}

/* ---------- Cards ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.card-title { font-size: 14px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }

/* ---------- Forms ---------- */

.form { display: flex; flex-direction: column; gap: var(--gap); }
.form-row { display: flex; gap: var(--gap); }
.form-row > * { flex: 1; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.field-hint { font-size: 12px; color: var(--muted); }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="search"],
select,
textarea {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
}
textarea { resize: vertical; min-height: 80px; font-family: inherit; }

.checkbox { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox input { width: auto; margin: 0; }

.form-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.form-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* ---------- Buttons ---------- */

.btn {
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 8px 16px;
  font-size: 14px;
  font-family: inherit;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.1s;
}
.btn:hover:not(:disabled) { background: var(--border); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: var(--danger); color: #fff; }
.btn-block { width: 100%; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-group { display: flex; gap: 8px; }

/* ---------- Tables ---------- */

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.table th, .table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th {
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.4px;
}
.table tr:hover td { background: var(--surface-2); }

/* ---------- Badges ---------- */

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border: 1px solid var(--border-strong);
  color: var(--muted);
}
.badge-info     { color: var(--info);    border-color: var(--info); }
.badge-success  { color: var(--success); border-color: var(--success); }
.badge-warning  { color: var(--warning); border-color: var(--warning); }
.badge-danger   { color: var(--danger);  border-color: var(--danger); }
.badge-primary  { color: var(--primary); border-color: var(--primary); }

/* ---------- Login page ---------- */

.login-body { display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.login-title { font-size: 20px; margin-bottom: 4px; }
.login-sub { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
.login-foot { margin-top: 20px; text-align: center; }

/* ---------- Stat blocks (for campaign detail) ---------- */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.stat-cell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; }
.stat-value { font-size: 22px; font-weight: 600; margin-top: 4px; }
.stat-value-success { color: var(--success); }
.stat-value-danger  { color: var(--danger); }
.stat-value-warning { color: var(--warning); }
.stat-value-info    { color: var(--info); }

/* ---------- Toolbar ---------- */

.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.toolbar select, .toolbar input { width: auto; }

/* ---------- Modal ---------- */

.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal-backdrop[data-open="true"] { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 420px;
}
.modal h2 { margin-top: 0; }

/* ---------- Misc ---------- */

.divider { height: 1px; background: var(--border); margin: 16px 0; }
.row { display: flex; gap: var(--gap); align-items: center; }
.spacer { flex: 1; }
.hidden { display: none !important; }
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; }
pre.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 12px;
  font-family: var(--mono);
}