*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f8f8f7;
  --surface: #ffffff;
  --border: #e5e5e3;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --accent: #1a56db;
  --accent-hover: #1345b8;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  border: none;
  border-radius: var(--radius);
  padding: 7px 14px;
  transition: background 0.15s;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

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

.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: #fef2f2; }

input, textarea, select {
  font-family: inherit;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 10px;
  background: var(--surface);
  color: var(--text);
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); }

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.error {
  color: var(--danger);
  font-size: 13px;
  padding: 8px 12px;
  background: #fef2f2;
  border-radius: var(--radius);
  border: 1px solid #fecaca;
}

.success {
  color: var(--success);
  font-size: 13px;
  padding: 8px 12px;
  background: #f0fdf4;
  border-radius: var(--radius);
  border: 1px solid #bbf7d0;
}

.hidden { display: none !important; }

/* Admin layout */
.admin-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
}

.admin-logo {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
}

.admin-main {
  padding: 32px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.data-table th {
  text-align: left;
  padding: 10px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover td { background: #fafafa; }

.table-actions { display: flex; gap: 8px; }

/* Editor layout */
.editor-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 20px;
  align-items: start;
}

.editor-sidebar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.editor-sidebar-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 13px;
}

.question-list-item {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.1s;
}

.question-list-item:last-child { border-bottom: none; }
.question-list-item:hover { background: var(--bg); }
.question-list-item.active { background: #eff6ff; color: var(--accent); }

.question-number {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 20px;
}

.editor-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.editor-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.field-group { margin-bottom: 16px; }

.options-list { display: flex; flex-direction: column; gap: 8px; }

.option-row { display: flex; gap: 8px; align-items: center; }
.option-row input { flex: 1; }

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
}

.checkbox-label input[type="checkbox"] { width: auto; cursor: pointer; }