/* ────────────────────────────────────────────────
   PDF Exams Admin — Design Tokens
   ──────────────────────────────────────────────── */
:root {
  --primary: #155DFC;
  --primary-light: #EFF6FF;
  --primary-border: #DBEAFE;
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --text-900: #0A0A0A;
  --text-700: #171717;
  --text-500: #404040;
  --text-400: #525252;
  --text-300: #737373;
  --text-200: #A1A1A1;
  --border: #EFEFEF;
  --border-dark: #E5E5E5;
  --error: #DC2626;
  --success: #16A34A;
  --warning: #F59E0B;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.12);
  --font: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-500);
  font-size: 14px;
  line-height: 1.5;
}

/* ── Utility ── */
.screen { min-height: 100vh; }
.error-text { color: var(--error); font-size: 13px; margin-top: 8px; min-height: 20px; }

/* ────────────────────────────────────────────────
   Login
   ──────────────────────────────────────────────── */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg) 100%);
}

.login-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.login-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.login-card h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-900);
  margin-bottom: 4px;
}

.login-subtitle {
  color: var(--text-300);
  margin-bottom: 24px;
  font-size: 14px;
}

/* ── Form ── */
.form-group {
  text-align: left;
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-500);
  margin-bottom: 6px;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group input[type="datetime-local"],
.form-group input[type="file"],
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-700);
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21, 93, 252, 0.1);
}
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21, 93, 252, 0.1);
}

.form-group textarea {
  width: 100%;
  min-height: 400px;
  padding: 14px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--text-700);
  line-height: 1.6;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}

.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21, 93, 252, 0.1);
}

.form-group-grow {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.form-group-grow textarea {
  flex: 1;
  min-height: 300px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  padding: 10px 20px;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover:not(:disabled) {
  background: #1250E0;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-dark);
  color: var(--text-500);
}
.btn-outline:hover:not(:disabled) {
  background: var(--bg);
}

.btn-ghost {
  background: transparent;
  color: var(--text-400);
}
.btn-ghost:hover {
  background: var(--bg);
}

.btn-full { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

.btn-google {
  background: #fff;
  border: 1px solid var(--border-dark);
  color: var(--text-700);
  margin-bottom: 16px;
}
.btn-google:hover:not(:disabled) {
  background: #f8fafc;
}

.login-divider {
  position: relative;
  text-align: center;
  margin: 6px 0 16px;
}

.login-divider::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--border);
}

.login-divider span {
  position: relative;
  background: var(--surface);
  padding: 0 10px;
  font-size: 12px;
  color: var(--text-300);
}

/* ────────────────────────────────────────────────
   Topbar
   ──────────────────────────────────────────────── */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-900);
}

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

.user-email {
  font-size: 13px;
  color: var(--text-300);
}

/* ────────────────────────────────────────────────
   Container / Layout
   ──────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* ── Panel ── */
.panel {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.panel-editor {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 120px);
}

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

.panel-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-700);
}

.editor-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.editor-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.editor-meta {
  padding: 12px 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.meta-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-label {
  font-size: 12px;
  color: var(--text-300);
  font-weight: 500;
}

.meta-value {
  font-size: 12px;
  color: var(--text-500);
  font-weight: 600;
}

.panel-editor .form-group {
  padding: 0 20px;
  margin-bottom: 0;
  margin-top: 16px;
}

.panel-editor .form-group-grow {
  padding: 0 20px;
  margin-top: 12px;
  margin-bottom: 20px;
}

.test-metrics-section {
  margin: 4px 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fcfcfc;
  padding: 16px;
}

.test-metrics-header h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-700);
}

.test-metrics-header p {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-300);
}

.test-metrics-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.test-metrics-section .form-group {
  margin: 0;
  padding: 0;
}

.test-metrics-section .metric-notes {
  min-height: 80px;
  margin-top: 6px;
  font-size: 12px;
}

.test-metrics-actions {
  margin-top: 12px;
  display: flex;
  justify-content: flex-end;
}

.test-metrics-history {
  margin-top: 16px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.test-metrics-history h5 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-700);
}

.test-metrics-list {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.test-metric-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 10px 12px;
}

.test-metric-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.test-metric-model {
  font-size: 12px;
  color: var(--text-700);
  font-weight: 600;
}

.test-metric-date {
  font-size: 11px;
  color: var(--text-300);
}

.test-metric-values {
  margin-top: 6px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 12px;
  font-size: 12px;
}

.test-metric-note {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-400);
  white-space: pre-wrap;
}

.test-result-box {
  margin-top: 8px;
  max-height: 280px;
  overflow: auto;
  white-space: pre-wrap;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-size: 12px;
  color: var(--text-500);
  font-family: 'SF Mono', 'JetBrains Mono', 'Fira Code', monospace;
}

/* ── Badge ── */
.badge {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 100px;
}

.badge-inactive {
  background: var(--bg);
  color: var(--text-200);
}

/* ── Toggle ── */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-400);
  cursor: pointer;
}

.toggle-label input[type="checkbox"] {
  appearance: none;
  width: 36px;
  height: 20px;
  border-radius: 10px;
  background: var(--border-dark);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-label input[type="checkbox"]::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}

.toggle-label input[type="checkbox"]:checked {
  background: var(--primary);
}

.toggle-label input[type="checkbox"]:checked::after {
  transform: translateX(16px);
}

/* ── Prompt List ── */
.prompt-list {
  padding: 8px;
}

.prompt-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
}

.prompt-item:hover {
  background: var(--bg);
}

.prompt-item-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.prompt-type-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  flex-shrink: 0;
}

.prompt-type-icon.inactive {
  background: var(--bg);
  color: var(--text-200);
}

.prompt-item-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-700);
}

.prompt-item-info p {
  font-size: 12px;
  color: var(--text-300);
  margin-top: 2px;
}

.prompt-item-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.prompt-item-right .chevron {
  color: var(--text-200);
  font-size: 18px;
}

/* ── Save Status ── */
.save-status {
  padding: 0 20px 16px;
  font-size: 13px;
  min-height: 24px;
}

.save-status.success { color: var(--success); }
.save-status.error { color: var(--error); }

/* ── Loading ── */
.loading {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-300);
}

/* ── Modal ── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.modal-card {
  position: relative;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

.modal-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-900);
  margin-bottom: 8px;
}

.modal-card p {
  color: var(--text-300);
  font-size: 14px;
  margin-bottom: 20px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .container { padding: 16px; }
  .topbar { padding: 0 16px; }
  .editor-meta { padding: 12px 16px; }
  .panel-editor .form-group,
  .panel-editor .form-group-grow { padding: 0 16px; }
  .test-metrics-section { margin: 4px 16px 0; }
  .test-metrics-grid { grid-template-columns: 1fr; }
  .test-metric-values { grid-template-columns: 1fr; }
  .save-status { padding: 0 16px 16px; }
}