/* ==========================================================================
   Moodle Boost Theme Styling for Usability A/B Testing App
   SPŠE Ječná Course Structure Test
   Exact replica of Moodle course categories as shown in image.png
   ========================================================================== */

:root {
  --moodle-blue: #0f6cbf;
  --moodle-blue-hover: #0b5190;
  --moodle-blue-light: #e7f1fb;
  --moodle-link-blue: #0070a8;
  --moodle-link-hover: #004d73;
  --moodle-line-blue: #70b3e5;
  --moodle-dark: #1e293b;
  --moodle-gray: #64748b;
  --moodle-gray-light: #f8fafc;
  --moodle-border: #e2e8f0;
  --moodle-card-bg: #ffffff;
  --moodle-text: #334155;
  --moodle-success: #10b981;
  --moodle-success-bg: #ecfdf5;
  --moodle-warning: #f59e0b;
  --moodle-warning-bg: #fffbeb;
  --moodle-danger: #ef4444;
  --moodle-danger-bg: #fef2f2;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--moodle-text);
  background-color: #f1f5f9;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ================= Navbar ================= */
.moodle-navbar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--moodle-border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--moodle-dark);
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: var(--moodle-blue);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 18px;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--moodle-dark);
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--moodle-gray);
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--moodle-text);
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.nav-link:hover {
  background-color: var(--moodle-gray-light);
  color: var(--moodle-blue);
}

.nav-link.active {
  background-color: var(--moodle-blue-light);
  color: var(--moodle-blue);
  font-weight: 600;
}

/* ================= Sticky Task Bar ================= */
.task-bar-wrapper {
  background: #ffffff;
  border-bottom: 2px solid var(--moodle-blue);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 60px;
  z-index: 900;
}

.task-bar-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.task-badge-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.task-badge {
  background-color: var(--moodle-blue);
  color: #ffffff;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.variant-tag {
  background-color: #f1f5f9;
  color: #475569;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.task-metrics {
  display: flex;
  gap: 12px;
  align-items: center;
}

.metric-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: #f8fafc;
  border: 1px solid var(--moodle-border);
}

.metric-pill.timer {
  color: var(--moodle-blue);
  background-color: var(--moodle-blue-light);
  border-color: #bfdbfe;
}

.metric-pill.errors {
  color: var(--moodle-danger);
  background-color: var(--moodle-danger-bg);
  border-color: #fecaca;
}

.task-instruction-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.task-prompt-box {
  flex: 1;
}

.task-prompt-text {
  font-size: 1.05rem;
  color: var(--moodle-dark);
  font-weight: 500;
  margin-bottom: 4px;
}

.target-raw-highlight {
  display: inline-flex;
  align-items: center;
  background-color: #fef3c7;
  color: #92400e;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  border: 1px solid #fde68a;
}

.task-progress-bar-container {
  width: 100%;
  height: 5px;
  background-color: #e2e8f0;
  border-radius: 3px;
  overflow: hidden;
}

.task-progress-bar {
  height: 100%;
  background: var(--moodle-blue);
  transition: width 0.3s ease;
}

/* ================= Main Container ================= */
.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 20px auto;
  padding: 0 20px;
}

.view-section {
  display: none;
}

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

/* ================= Cards ================= */
.card {
  background-color: var(--moodle-card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--moodle-border);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--moodle-dark);
  margin-bottom: 8px;
}

.card-subtitle {
  font-size: 0.95rem;
  color: var(--moodle-gray);
  margin-bottom: 20px;
}

/* ================= Buttons ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  text-decoration: none;
  background-color: #94b9ef;
  color: #000000;
}

.btn:hover {
  background-color: #7faeec;
  color: #000000;
}

.btn-primary {
  background-color: #94b9ef;
  color: #000000;
  border-color: #7faeec;
}

.btn-primary:hover {
  background-color: #7faeec;
  color: #000000;
  border-color: #6a9ee8;
}

.btn-outline {
  background-color: #94b9ef;
  border-color: #7faeec;
  color: #000000;
}

.btn-outline:hover {
  background-color: #7faeec;
  color: #000000;
  border-color: #6a9ee8;
}

.btn-danger-outline {
  background-color: #ffffff;
  border-color: #fca5a5;
  color: var(--moodle-danger);
}

.btn-danger-outline:hover {
  background-color: var(--moodle-danger-bg);
  border-color: var(--moodle-danger);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

/* ================= Breadcrumbs ================= */
.moodle-breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  background-color: #ffffff;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--moodle-border);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.breadcrumb-item {
  color: var(--moodle-link-blue);
  cursor: pointer;
}

.breadcrumb-item:hover {
  text-decoration: underline;
}

.breadcrumb-item.active {
  color: var(--moodle-dark);
  font-weight: 600;
  cursor: default;
  text-decoration: none;
}

.breadcrumb-separator {
  color: #94a3b8;
  margin: 0 4px;
}

/* ==========================================================================
   AUTHENTIC MOODLE TREE & COURSE STYLING (MATCHING image.png)
   ========================================================================== */

.moodle-tree-wrapper {
  background: #ffffff;
  border-top: 1px solid var(--moodle-line-blue);
  padding: 8px 0;
}

/* Category Row */
.moodle-cat-row {
  border-bottom: 1px solid var(--moodle-line-blue);
  padding-top: 8px;
  padding-bottom: 8px;
  display: flex;
  align-items: center;
  user-select: none;
}

/* Toggle Arrow: triangle pointing right or down */
.moodle-cat-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-right: 6px;
  color: #737373;
  font-size: 15px;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.moodle-cat-toggle.collapsed {
  transform: rotate(0deg);
}

.moodle-cat-toggle.expanded {
  transform: rotate(90deg);
}

/* Category Title Link */
.moodle-cat-title {
  color: var(--moodle-link-blue);
  font-weight: 400;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.3;
}

.moodle-cat-title:hover {
  text-decoration: underline;
  color: var(--moodle-link-hover);
}

/* Depth 0 (Top level category) */
.moodle-cat-depth-0 .moodle-cat-title {
  font-size: 26px;
}

/* Depth 1 (Subcategory) */
.moodle-cat-depth-1 {
  padding-left: 28px;
}
.moodle-cat-depth-1 .moodle-cat-title {
  font-size: 22px;
}

/* Depth 2+ */
.moodle-cat-depth-2 {
  padding-left: 56px;
}
.moodle-cat-depth-2 .moodle-cat-title {
  font-size: 19px;
}

/* Course Row */
.moodle-course-row {
  border-bottom: 1px solid var(--moodle-line-blue);
  padding-top: 7px;
  padding-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.moodle-course-row:hover {
  background-color: #f0f7ff;
}

.moodle-course-depth-0 {
  padding-left: 28px;
}

.moodle-course-depth-1 {
  padding-left: 54px;
}

.moodle-course-depth-2 {
  padding-left: 80px;
}

/* Iconic 3-node connected Moodle course icon */
.moodle-course-icon-svg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Course Name Link */
.moodle-course-name {
  color: var(--moodle-link-blue);
  font-size: 15px;
  font-weight: 400;
  text-decoration: none;
}

.moodle-course-row:hover .moodle-course-name {
  text-decoration: underline;
  color: var(--moodle-link-hover);
}

/* Info Icon 'i' (Blue serif letter) */
.moodle-info-icon {
  font-family: 'Times New Roman', Times, Georgia, serif;
  font-weight: bold;
  font-size: 16px;
  color: var(--moodle-link-blue);
  margin-left: 4px;
  line-height: 1;
  display: inline-block;
  user-select: none;
}

/* Enrolment Key Icon (arrow into bracket) */
.moodle-enrol-icon {
  display: inline-flex;
  align-items: center;
  margin-left: 4px;
  opacity: 0.85;
}

/* Shake Animation for Wrong Course */
@keyframes shakeRow {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.shake-error {
  animation: shakeRow 0.35s ease-in-out;
  background-color: #fee2e2 !important;
}

/* Toast Alert (No Emoji) */
.toast-alert {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: #1e293b;
  color: #ffffff;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  z-index: 2000;
  max-width: 450px;
}

.toast-alert.error {
  background-color: #b91c1c;
}

.toast-alert.success {
  background-color: #065f46;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3000;
}

.modal-box {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 28px;
  max-width: 500px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.modal-icon-badge {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--moodle-success-bg);
  color: var(--moodle-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  font-weight: 700;
  font-size: 24px;
  border: 2px solid #a7f3d0;
}

.modal-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--moodle-dark);
  margin-bottom: 6px;
}

.modal-text {
  font-size: 0.95rem;
  color: var(--moodle-gray);
  margin-bottom: 20px;
}

.modal-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  background-color: #f8fafc;
  border: 1px solid var(--moodle-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 20px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--moodle-dark);
}

.stat-label {
  font-size: 0.72rem;
  color: var(--moodle-gray);
  text-transform: uppercase;
  font-weight: 600;
  margin-top: 2px;
}

/* Spinner (No Emoji) */
.spinner {
  width: 38px;
  height: 38px;
  border: 3px solid #e2e8f0;
  border-top-color: var(--moodle-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ================= Setup & Welcome View ================= */
.welcome-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 24px;
}

@media (max-width: 850px) {
  .welcome-grid {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--moodle-dark);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--moodle-border);
  font-size: 0.95rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--moodle-blue);
  box-shadow: 0 0 0 3px rgba(15, 108, 191, 0.15);
}

.variant-picker {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.variant-option-card {
  border: 1px solid var(--moodle-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.variant-option-card:hover {
  border-color: #cbd5e1;
  background-color: #f8fafc;
}

.variant-option-card.selected {
  border-color: var(--moodle-blue);
  background-color: var(--moodle-blue-light);
}

.variant-radio {
  margin-top: 3px;
}

.variant-info-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--moodle-dark);
}

.variant-info-desc {
  font-size: 0.82rem;
  color: var(--moodle-gray);
  margin-top: 2px;
}

/* ================= Analytics & Results ================= */
.metrics-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: #ffffff;
  border: 1px solid var(--moodle-border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.kpi-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--moodle-gray);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.kpi-value {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--moodle-dark);
}

.kpi-sub {
  font-size: 0.8rem;
  color: var(--moodle-gray);
  margin-top: 4px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--moodle-border);
  background: #ffffff;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th {
  background-color: #f8fafc;
  color: #475569;
  font-weight: 600;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--moodle-border);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--moodle-border);
  color: var(--moodle-dark);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: #f8fafc;
}

.badge-winner {
  background-color: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
}

/* Charts */
.chart-box {
  background: #ffffff;
  border: 1px solid var(--moodle-border);
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 24px;
}

.chart-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--moodle-dark);
}

.bar-chart-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chart-bar-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.bar-label {
  width: 170px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--moodle-dark);
  flex-shrink: 0;
}

.bar-track {
  flex: 1;
  height: 26px;
  background-color: #f1f5f9;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.bar-fill {
  height: 100%;
  background: var(--moodle-blue);
  border-radius: 4px;
  transition: width 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
}

.bar-fill.danger {
  background: #ef4444;
}

.bar-fill.success {
  background: #10b981;
}

/* Star Rating Component (No Emojis) */
.star-rating-container {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.star-group {
  display: inline-flex;
  gap: 4px;
}

.star-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  line-height: 0;
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease;
}

.star-btn:hover {
  transform: scale(1.15);
}

.star-btn:focus-visible {
  outline: 2px solid var(--moodle-blue);
}

.star-btn svg {
  width: 32px;
  height: 32px;
  stroke: #94a3b8;
  fill: #f1f5f9;
  transition: fill 0.15s ease, stroke 0.15s ease;
}

.star-btn.hovered svg,
.star-btn.selected svg {
  stroke: #d97706;
  fill: #f59e0b;
}

.star-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--moodle-dark);
}

/* Footer */
.moodle-footer {
  margin-top: auto;
  background-color: #ffffff;
  border-top: 1px solid var(--moodle-border);
  padding: 16px 0;
  color: var(--moodle-gray);
  font-size: 0.82rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}