/* ==========================================================================
   QuestDB - Design System & Stylesheet (Administrativo UMU Test Runner)
   Aesthetics: Clean, modern, compact, highly legible, academic-corporate.
   ========================================================================== */

:root {
  /* Primary & Brand Colors */
  --primary: #1565c0;
  --primary-hover: #0d47a1;
  --primary-light: #e3f2fd;
  --primary-focus: rgba(21, 101, 192, 0.25);
  
  /* Semantic Status Colors */
  --success: #2e7d32;
  --success-light: #e8f5e9;
  --success-border: #a5d6a7;
  
  --danger: #c62828;
  --danger-light: #ffebee;
  --danger-border: #ef9a9a;
  
  --warning: #ed6c02;
  --warning-light: #fff3e0;
  --warning-border: #ffcc80;
  
  --info: #0288d1;
  --info-light: #e1f5fe;
  
  /* Neutral Colors */
  --bg-app: #f4f6f9;
  --bg-card: #ffffff;
  --bg-subtle: #f8fafc;
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  
  /* Layout & Sizing */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Header */
.app-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 1.75rem;
}

.app-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.app-title span {
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.app-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-app);
  padding: 0.3rem;
  border-radius: var(--radius-md);
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.6);
}

.tab-btn.active {
  background-color: #ffffff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* User Selector Pill */
.user-selector-area {
  display: flex;
  align-items: center;
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem 0.35rem 0.35rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
}

.user-pill:hover {
  background-color: #ffffff;
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.user-avatar {
  width: 32px;
  height: 32px;
  background-color: var(--primary);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.user-avatar.lg {
  width: 48px;
  height: 48px;
  font-size: 1.25rem;
}

.user-avatar.xl {
  width: 60px;
  height: 60px;
  font-size: 1.5rem;
}

.user-info {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.user-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

.user-role {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.dropdown-chevron {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-left: 0.2rem;
}

/* Main Layout */
.main-content {
  max-width: 1280px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
}

.app-view {
  display: none;
  animation: fadeIn 0.25s ease-in-out;
}

.app-view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Reusable Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.card-header h2, .card-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}

.badge-info { background-color: var(--info-light); color: var(--info); }
.badge-success { background-color: var(--success-light); color: var(--success); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); }
.badge-danger { background-color: var(--danger-light); color: var(--danger); }
.badge-secondary { background-color: #f1f5f9; color: #475569; }
.badge-light { background-color: #f8fafc; color: var(--text-muted); border: 1px solid var(--border-color); }

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.85rem;
  font-size: 0.925rem;
  font-family: inherit;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  color: var(--text-main);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-focus);
}

.form-help {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* Pill Selectors */
.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill-btn {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
}

.pill-btn:hover {
  background-color: #ffffff;
  border-color: var(--primary);
  color: var(--primary);
}

.pill-btn.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

/* Custom Checkbox / Radio List */
.checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.custom-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.custom-checkbox:hover {
  background-color: #ffffff;
  border-color: var(--primary);
}

.custom-checkbox input {
  display: none;
}

.checkbox-mark {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-hover);
  border-radius: 50%;
  margin-top: 2px;
  flex-shrink: 0;
  position: relative;
  transition: var(--transition);
}

.custom-checkbox input:checked + .checkbox-mark {
  border-color: var(--primary);
  background-color: var(--primary);
}

.custom-checkbox input:checked + .checkbox-mark::after {
  content: '';
  position: absolute;
  top: 4px;
  left: 4px;
  width: 6px;
  height: 6px;
  background: #ffffff;
  border-radius: 50%;
}

.checkbox-text strong {
  display: block;
  font-size: 0.875rem;
  color: var(--text-main);
}

.checkbox-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  font-size: 0.925rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  gap: 0.4rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

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

.btn-secondary {
  background-color: #f1f5f9;
  color: #334155;
  border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #e2e8f0;
}

.btn-outline-secondary {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-muted);
}

.btn-outline-secondary:hover:not(:disabled) {
  background-color: var(--bg-subtle);
  color: var(--text-main);
}

.btn-outline-warning {
  background-color: transparent;
  border-color: var(--warning-border);
  color: var(--warning);
}

.btn-outline-warning:hover:not(:disabled) {
  background-color: var(--warning-light);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
  background-color: #b71c1c;
}

.btn-warning {
  background-color: var(--warning);
  color: #ffffff;
}

.btn-lg {
  padding: 0.85rem 1.5rem;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
}

/* Config Grid */
.config-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .config-grid {
    grid-template-columns: 1fr;
  }
}

.quick-user-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.quick-user-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.quick-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  background-color: var(--bg-subtle);
  padding: 0.85rem;
  border-radius: var(--radius-md);
  text-align: center;
}

.q-stat .q-num {
  display: block;
  font-size: 1.35rem;
  font-weight: 700;
}

.q-stat .q-label {
  font-size: 0.725rem;
  color: var(--text-muted);
}

.criteria-list {
  list-style: none;
  margin-top: 0.75rem;
}

.criteria-list li {
  padding: 0.35rem 0;
  font-size: 0.825rem;
  color: var(--text-main);
  border-bottom: 1px dashed var(--border-color);
}

.criteria-list li:last-child {
  border-bottom: none;
}

/* ==========================================================================
   VIEW 2: EXAM RUNNER STYLES
   ========================================================================== */
.exam-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  margin-bottom: 1rem;
}

.exam-info-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.exam-badge {
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.exam-progress-text {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.exam-timer {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
}

.exam-actions-right {
  display: flex;
  gap: 0.5rem;
}

/* Question Nav Grid */
.question-nav-card {
  padding: 0.75rem;
  margin-bottom: 1rem;
}

.nav-grid-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.nav-q-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: #ffffff;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.nav-q-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.nav-q-btn.active {
  border-color: var(--primary);
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 700;
}

.nav-q-btn.answered {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.nav-q-btn.favorite::after {
  content: '★';
  position: absolute;
  top: -4px;
  right: -4px;
  font-size: 8px;
  color: var(--warning);
}

/* Question Card */
.question-card {
  padding: 2rem;
}

.q-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.q-tags {
  display: flex;
  gap: 0.5rem;
}

.q-status-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.case-context-box {
  background-color: #f8fafc;
  border-left: 4px solid var(--info);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.case-header {
  font-size: 0.875rem;
  color: var(--info);
  margin-bottom: 0.5rem;
}

.case-content {
  font-size: 0.85rem;
  color: var(--text-main);
  white-space: pre-line;
  max-height: 180px;
  overflow-y: auto;
}

.q-text {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.q-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.option-card {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  cursor: pointer;
  transition: var(--transition);
}

.option-card:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.option-card.selected {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: 0 0 0 2px var(--primary-focus);
}

.opt-letter {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.option-card.selected .opt-letter {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.opt-text {
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--text-main);
}

.q-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
}

/* ==========================================================================
   VIEW 3: RESULTS STYLES
   ========================================================================== */
.results-hero-card {
  padding: 2rem;
}

.results-hero-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  align-items: center;
}

@media (max-width: 768px) {
  .results-hero-grid {
    grid-template-columns: 1fr;
  }
}

.score-box {
  background: linear-gradient(135deg, #1565c0, #0d47a1);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.score-box.pass { background: linear-gradient(135deg, #2e7d32, #1b5e20); }
.score-box.fail { background: linear-gradient(135deg, #c62828, #b71c1c); }

.score-number {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
}

.score-scale {
  font-size: 0.85rem;
  opacity: 0.85;
  margin-top: 0.25rem;
}

.score-status {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 0.75rem;
  padding: 0.25rem 0.6rem;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.25rem 0;
}

@media (max-width: 600px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-item {
  background-color: var(--bg-subtle);
  padding: 0.85rem;
  border-radius: var(--radius-md);
  text-align: center;
}

.metric-item .m-val {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
}

.metric-item .m-lbl {
  font-size: 0.725rem;
  color: var(--text-muted);
}

.results-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.solutions-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 1.5rem 0 1rem 0;
}

.filter-pills {
  display: flex;
  gap: 0.5rem;
}

.sol-item-card {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.sol-item-card.correct { border-left: 5px solid var(--success); }
.sol-item-card.incorrect { border-left: 5px solid var(--danger); }
.sol-item-card.blank { border-left: 5px solid var(--text-muted); }

.sol-explanation-box {
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  margin-top: 0.85rem;
  font-size: 0.85rem;
}

.legal-ref-badge {
  display: inline-block;
  background-color: #e0f2fe;
  color: #0369a1;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
  margin-bottom: 0.4rem;
}

/* ==========================================================================
   VIEW 4: STATS & DASHBOARD
   ========================================================================== */
.stats-header-card {
  margin-bottom: 1.5rem;
}

.stats-user-headline {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.stats-dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .stats-dashboard-grid {
    grid-template-columns: 1fr;
  }
}

.widget-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.w-item {
  background-color: var(--bg-subtle);
  padding: 1rem;
  border-radius: var(--radius-md);
}

.w-item .w-val {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
}

.w-item .w-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.block-row {
  margin-bottom: 1rem;
}

.block-label-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.progress-bar-bg {
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

/* History Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th, .data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-muted);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalPop 0.2s ease-out;
}

.modal-card-sm {
  max-width: 380px;
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-body {
  padding: 1.25rem;
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 1.25rem 0;
}

.user-list-modal {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.75rem 0;
  max-height: 220px;
  overflow-y: auto;
}

.user-modal-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.user-modal-item:hover, .user-modal-item.active {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary); }