:root {
  --quas-bg: #000000;
  --quas-bg-card: #0a0a0a;
  --quas-bg-input: #111111;
  --quas-border: #1a1a1a;
  --quas-teal: #00b894;
  --quas-teal-dark: #008b74;
  --quas-teal-light: #00d4aa;
  --quas-text: #f0f0f0;
  --quas-muted: #888888;
  --quas-danger: #ef4444;
  --quas-success: #34d399;
  --quas-gradient: linear-gradient(135deg, #008b74 0%, #00d4aa 100%);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--quas-bg);
  color: var(--quas-text);
  min-height: 100vh;
}

.quas-logo {
  display: block;
  max-width: 180px;
  height: auto;
  margin: 0 auto 24px;
}

.quas-logo-sm {
  max-width: 120px;
  margin: 0;
}

.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 184, 148, 0.08) 0%, transparent 60%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--quas-bg-card);
  border: 1px solid var(--quas-border);
  border-radius: 16px;
  padding: 32px 28px;
}

.auth-card h1 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--quas-muted);
  font-size: 14px;
  margin: 0 0 28px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--quas-muted);
  margin-bottom: 6px;
  font-weight: 500;
}

.field input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--quas-border);
  background: var(--quas-bg-input);
  color: var(--quas-text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.field input:focus {
  border-color: var(--quas-teal);
}

.btn-quas {
  width: 100%;
  padding: 13px 20px;
  border: 0;
  border-radius: 10px;
  background: var(--quas-gradient);
  color: #000;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  letter-spacing: 0.02em;
}

.btn-quas:hover { opacity: 0.9; }
.btn-quas:active { transform: scale(0.98); }
.btn-quas:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
  background: var(--quas-bg-input);
  color: var(--quas-text);
  border: 1px solid var(--quas-border);
}

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 16px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-info {
  background: rgba(0, 184, 148, 0.1);
  border: 1px solid rgba(0, 184, 148, 0.25);
  color: var(--quas-teal-light);
}

.qr-wrap {
  text-align: center;
  margin: 20px 0;
}

.qr-wrap img {
  max-width: 200px;
  border-radius: 12px;
  border: 1px solid var(--quas-border);
  padding: 8px;
  background: #fff;
}

.secret-code {
  font-family: monospace;
  font-size: 13px;
  background: var(--quas-bg-input);
  padding: 10px 14px;
  border-radius: 8px;
  word-break: break-all;
  text-align: center;
  color: var(--quas-teal-light);
  margin: 12px 0;
}

/* Panel layout */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--quas-border);
  background: var(--quas-bg-card);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

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

.user-badge {
  font-size: 13px;
  color: var(--quas-muted);
}

.user-badge strong { color: var(--quas-teal-light); }

.btn-sm {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--quas-border);
  background: var(--quas-bg-input);
  color: var(--quas-text);
  text-decoration: none;
  display: inline-block;
}

.btn-sm:hover { border-color: var(--quas-teal); color: var(--quas-teal-light); }

.btn-sm-primary {
  background: var(--quas-gradient);
  color: #000;
  border: 0;
}

.panel-wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.panel-wrap h1 {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 700;
  background: var(--quas-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-wrap .lead {
  color: var(--quas-muted);
  font-size: 14px;
  line-height: 1.5;
  margin: 0 0 20px;
}

.card {
  background: var(--quas-bg-card);
  border: 1px solid var(--quas-border);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 14px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 650;
  color: var(--quas-teal-light);
}

.card > p.hint {
  margin: 0 0 12px;
  color: var(--quas-muted);
  font-size: 13px;
}

textarea, input[type="text"], input[type="email"], input[type="password"] {
  width: 100%;
  box-sizing: border-box;
  border-radius: 10px;
  border: 1px solid var(--quas-border);
  background: var(--quas-bg-input);
  color: var(--quas-text);
  padding: 10px 12px;
  font-size: 14px;
}

textarea { min-height: 160px; resize: vertical; }
textarea.sm { min-height: 88px; }
textarea.md { min-height: 110px; }

.field-hint { font-size: 11px; color: var(--quas-muted); margin-top: 4px; }
.hidden { display: none !important; }
.inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.inline input { flex: 1; min-width: 100px; }
.ghost { color: var(--quas-muted); font-size: 13px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 10px; }

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
  background: var(--quas-gradient);
  color: #000;
}

button.secondary {
  background: var(--quas-bg-input);
  color: var(--quas-text);
  border: 1px solid var(--quas-border);
}

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

pre {
  white-space: pre-wrap;
  background: var(--quas-bg-input);
  border: 1px solid var(--quas-border);
  border-radius: 10px;
  padding: 12px;
  font-size: 12px;
  overflow: auto;
  margin: 0;
}

.preview-frame {
  width: 100%;
  min-height: 420px;
  border: 1px solid var(--quas-border);
  border-radius: 10px;
  background: #fff;
  margin-top: 10px;
  display: block;
}

details.muted { margin-bottom: 12px; }
details.muted summary {
  cursor: pointer;
  color: var(--quas-muted);
  font-size: 13px;
  user-select: none;
}
details.muted summary:hover { color: var(--quas-teal-light); }
details.muted .inner {
  margin-top: 8px;
  color: var(--quas-muted);
  font-size: 13px;
  line-height: 1.45;
}

details.edit summary {
  cursor: pointer;
  font-size: 16px;
  font-weight: 650;
  color: var(--quas-text);
  padding: 4px 0;
  list-style: none;
}
details.edit summary::-webkit-details-marker { display: none; }
details.edit summary::before { content: '▸ '; color: var(--quas-teal); }
details.edit[open] summary::before { content: '▾ '; }

/* Admin table */
.admin-wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.admin-wrap h1 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 20px;
  background: var(--quas-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--quas-border);
  border-radius: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--quas-border);
}

th {
  background: var(--quas-bg-card);
  color: var(--quas-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:last-child td { border-bottom: 0; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-admin {
  background: rgba(0, 184, 148, 0.15);
  color: var(--quas-teal-light);
}

.badge-user {
  background: rgba(136, 136, 136, 0.15);
  color: var(--quas-muted);
}

.badge-active {
  background: rgba(52, 211, 153, 0.12);
  color: var(--quas-success);
}

.badge-inactive {
  background: rgba(239, 68, 68, 0.12);
  color: #fca5a5;
}

.btn-icon {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid var(--quas-border);
  background: transparent;
  color: var(--quas-muted);
}

.btn-icon:hover { border-color: var(--quas-danger); color: var(--quas-danger); }
.btn-icon.reset:hover { border-color: var(--quas-teal); color: var(--quas-teal-light); }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}