:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-muted: #555;
  --border: #e5e5e5;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #16a34a;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --text: #f5f5f5;
    --text-muted: #aaa;
    --border: #2a2a2a;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
header.site-header .container {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header.site-header a.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}
header.site-header nav a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
}
header.site-header nav a:hover {
  color: var(--primary);
}

h1 {
  font-size: 28px;
  margin-top: 24px;
  margin-bottom: 8px;
  line-height: 1.25;
}
h2 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 8px;
}
h3 {
  font-size: 16px;
  margin-top: 24px;
  margin-bottom: 8px;
}
p, li {
  color: var(--text);
}
.muted {
  color: var(--text-muted);
  font-size: 14px;
}
a {
  color: var(--primary);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}
table th, table td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  font-size: 14px;
}
table th {
  background: var(--surface);
  font-weight: 600;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin: 16px 0;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background 0.15s;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-hover);
}
.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover {
  background: var(--danger-hover);
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

input[type="email"], input[type="password"], input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
}
input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}
label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  margin-top: 16px;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin: 12px 0;
}
.alert-error {
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.3);
}
.alert-success {
  background: rgba(22, 163, 74, 0.1);
  color: var(--success);
  border: 1px solid rgba(22, 163, 74, 0.3);
}
.alert-info {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.25);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 24px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}
footer a {
  color: var(--text-muted);
  margin: 0 8px;
}

.hidden {
  display: none;
}

.ok { color: var(--success); }
.err { color: var(--danger); }

.autocomplete-wrap {
  position: relative;
}
.autocomplete-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 220px;
  overflow-y: auto;
  z-index: 20;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}
.autocomplete-item {
  padding: 10px 14px;
  font-size: 14px;
  cursor: pointer;
}
.autocomplete-item:hover {
  background: rgba(37, 99, 235, 0.08);
}