/* ==========================================================================
   components.css - Reusable UI components (Minimalism: borders over shadows,
   solid fills, 8/12/16px radii, 150–250ms state transitions)
   ========================================================================== */

/* 1. BUTTONS ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 42px;
  padding: 0.6rem 1.15rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.3;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast),
              color var(--transition-fast), box-shadow var(--transition-fast);
  text-align: center;
  user-select: none;
  white-space: nowrap;
  text-decoration: none;
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

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

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

.btn-primary:active:not(:disabled) { box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.18); }

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

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

.btn-secondary.active {
  background: var(--primary-soft);
  color: var(--primary-hover);
  border-color: var(--primary);
}

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

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

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

.btn-danger:hover:not(:disabled) { background: #991B1B; color: #fff; }

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

.btn-danger-outline:hover:not(:disabled) {
  background: var(--danger-bg);
  border-color: var(--danger);
}

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

.btn-success:hover:not(:disabled) { background: #166534; color: #fff; }

.btn-sm {
  min-height: 34px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  min-height: 50px;
  padding: 0.8rem 1.6rem;
  font-size: 1.02rem;
  border-radius: var(--radius-md);
}

.btn-block { width: 100%; }

/* 2. CARDS --------------------------------------------------------------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.hover-lift {
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.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-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Stat cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  border: 1px solid var(--primary-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.stat-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
}

.stat-content { flex: 1; min-width: 0; }

.stat-value {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 3. BADGES -------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.2;
  white-space: nowrap;
  border: 1px solid transparent;
}

.badge-draft {
  background: var(--bg-muted);
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.badge-published {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success-border);
}

.badge-closed {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger-border);
}

.badge-primary {
  background: var(--primary-soft);
  color: var(--primary-hover);
  border-color: var(--primary-tint);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: var(--warning-border);
}

.badge-accent {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: #FED7AA;
}

/* 4. FORMS --------------------------------------------------------------- */
.form-group {
  margin-bottom: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

.form-control, .form-select, .form-textarea {
  width: 100%;
  min-height: 44px;
  padding: 0.65rem 0.9rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;             /* 16px prevents iOS zoom on focus */
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control::placeholder, .form-textarea::placeholder { color: #7A8896; }

.form-control:hover, .form-select:hover, .form-textarea:hover { border-color: var(--text-secondary); }

.form-control:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

.form-control:disabled, .form-select:disabled, .form-textarea:disabled {
  background: var(--bg-muted);
  color: var(--text-muted);
  cursor: not-allowed;
}

.form-control[aria-invalid="true"], .form-select[aria-invalid="true"] {
  border-color: var(--danger);
}

.form-control[aria-invalid="true"]:focus { box-shadow: 0 0 0 4px rgba(185, 28, 28, 0.15); }

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.input-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.field-error {
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--danger);
}

.field-error::before {
  content: "!";
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 0.1rem;
  border-radius: 50%;
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* 5. ALERTS -------------------------------------------------------------- */
.alert {
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.92rem;
  border: 1px solid transparent;
  border-left-width: 4px;
}

.alert-info    { background: var(--info-bg);    border-color: var(--info-border);    border-left-color: var(--primary); color: var(--primary-hover); }
.alert-success { background: var(--success-bg); border-color: var(--success-border); border-left-color: var(--success); color: #166534; }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); border-left-color: var(--warning); color: #854D0E; }
.alert-danger  { background: var(--danger-bg);  border-color: var(--danger-border);  border-left-color: var(--danger);  color: #991B1B; }

/* 6. PROGRESS ------------------------------------------------------------ */
.progress-container {
  width: 100%;
  background: var(--bg-muted);
  border-radius: var(--radius-full);
  height: 8px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary-bright);
  border-radius: var(--radius-full);
  transition: width 0.4s ease-out;
}

.progress-fill.is-complete { background: var(--success); }

/* 7. TABLES -------------------------------------------------------------- */
.table-container {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  padding: 0.75rem 1rem;
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-color);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.data-table td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  vertical-align: middle;
}

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

.data-table tbody tr { transition: background-color var(--transition-fast); }
.data-table tbody tr:hover td { background: var(--bg-card-hover); }

.data-table tfoot td {
  font-weight: 700;
  color: var(--text-primary);
  background: var(--bg-glass);
  border-top: 2px solid var(--border-color);
}

/* 8. MODALS -------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(19, 48, 46, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
  opacity: 0;
  /* hidden modals leave the tab order; visibility flips at the end of the fade-out */
  visibility: hidden;
  transition: opacity 0.15s ease, visibility 0s linear 0.15s;
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s ease, visibility 0s linear 0s;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 540px;
  max-height: calc(100vh - 2rem);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
  transform: translateY(8px);
  transition: transform var(--transition-bounce);
  overflow: hidden;
}

.modal-dialog > form { display: flex; flex-direction: column; min-height: 0; }

.modal-backdrop.active .modal-dialog { transform: translateY(0); }

.modal-header {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.modal-title { font-size: 1.15rem; }

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 0.9rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: var(--bg-glass);
}

.modal-close {
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  margin: -0.4rem -0.6rem 0 0;
  border-radius: var(--radius-md);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
}

.modal-close:hover { background: var(--bg-muted); color: var(--text-primary); }

/* 9. TOASTS -------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  left: auto;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  max-width: calc(100vw - 2.5rem);
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  padding: 0.8rem 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  min-width: 260px;
  animation: slideInUp 0.2s ease-out;
}

.toast-icon { display: inline-flex; flex-shrink: 0; }
.toast-success { border-left-color: var(--success); } .toast-success .toast-icon { color: var(--success); }
.toast-danger  { border-left-color: var(--danger); }  .toast-danger .toast-icon  { color: var(--danger); }
.toast-warning { border-left-color: var(--warning); } .toast-warning .toast-icon { color: var(--warning); }
.toast-info    { border-left-color: var(--primary); } .toast-info .toast-icon    { color: var(--primary); }

@keyframes slideInUp {
  from { transform: translateY(12px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* 10. EMPTY STATE -------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: 2.5rem 1.5rem;
}

.empty-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--primary-soft);
  border: 1px solid var(--primary-tint);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.empty-icon svg { width: 26px; height: 26px; stroke: currentColor; fill: none; }

.empty-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.empty-text {
  color: var(--text-muted);
  max-width: 440px;
  margin: 0 auto 1.25rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Skeleton placeholders for loading states */
.skeleton {
  display: block;
  border-radius: var(--radius-md);
  background: linear-gradient(90deg, var(--bg-muted) 25%, #F6FAF9 50%, var(--bg-muted) 75%);
  background-size: 200% 100%;
  animation: skeleton 1.4s ease-in-out infinite;
}

@keyframes skeleton {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

input[type="checkbox"],
input[type="radio"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* 11. APP LAYOUT HELPERS -------------------------------------------------- */

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: var(--space-xl);
}

.page-eyebrow {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}

.page-title {
  font-size: 2rem;
  margin-bottom: 0.3rem;
}

.page-lead {
  margin: 0;
  color: var(--text-secondary);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.section-title { font-size: 1.2rem; margin: 0; }
.section-block { margin-bottom: var(--space-2xl); }

.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-md);
}

.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }
.nowrap { white-space: nowrap; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent-text); }
.strong { font-weight: 700; color: var(--text-primary); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.hidden { display: none !important; }
.stack { display: flex; flex-direction: column; gap: 1rem; }

.link-button {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  background: none;
  border: none;
  padding: 0.1rem 0;
  color: var(--primary);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.link-button:hover { text-decoration: underline; color: var(--primary-hover); }

.user-pill-name {
  font-weight: 700;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Course switcher bar (teacher pages) */
.course-switcher {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.7rem 1rem;
  margin-bottom: var(--space-lg);
}

.course-switcher label {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.course-switcher .form-select {
  flex: 1;
  min-width: 220px;
  max-width: 480px;
}

/* Course cards */
.course-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--primary-bright);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.course-card:hover { box-shadow: var(--shadow-md); }
.course-card.is-archived { border-top-color: var(--border-hover); }

.course-card-code {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.course-card-name { font-size: 1.2rem; margin: 0.15rem 0 0.2rem; }
.course-card-meta { font-size: 0.85rem; color: var(--text-muted); }

.mini-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.mini-stat-value {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.mini-stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-progress { display: flex; flex-direction: column; gap: 0.35rem; }
.course-progress-label { display: flex; justify-content: space-between; font-size: 0.78rem; font-weight: 600; color: var(--text-muted); }

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

/* Class chip: "BBA · 1st Semester" */
.class-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.75rem;
}

.class-chip svg { width: 15px; height: 15px; flex-shrink: 0; }
.class-chip.class-chip-lg { font-size: 1.05rem; padding: 0.4rem 1rem; }

/* Subjects grouped by class (teacher home) */
.class-group + .class-group { margin-top: 2rem; }

.class-group-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  color: var(--primary);
  margin: 0;
}

.class-group-title svg { width: 20px; height: 20px; flex-shrink: 0; }

.class-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.9rem;
}

/* Class picker: fields for a class that isn't listed yet */
.new-class-fields {
  border-left: 3px solid var(--primary-border);
  padding-left: 0.85rem;
}

.form-row.form-row-3 { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }

/* Registration: the subjects a teacher teaches */
.auth-card.auth-card-wide { max-width: 560px; }

.subjects-fieldset {
  border: 0;
  padding: 0;
  margin: 0 0 1.25rem;
  min-width: 0;
}

.subjects-fieldset > legend { padding: 0; margin-bottom: 0.2rem; }
.subject-rows { display: grid; gap: 0.9rem; margin: 0.75rem 0; }

.subject-row {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-glass);
  padding: 0.75rem 1rem 0.1rem;
}

.subject-row-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  margin-bottom: 0.4rem;
}

.subject-row-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.subject-row .icon-btn svg { width: 16px; height: 16px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.icon-btn:hover:not(:disabled) { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
.icon-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.icon-btn svg { width: 16px; height: 16px; }

/* Open quiz tiles (student dashboard) */
.quiz-tile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-left: 4px solid var(--accent);
}

.quiz-tile.is-done { border-left-color: var(--success); }

.quiz-tile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.quiz-tile-title { font-size: 1.15rem; margin: 0.35rem 0 0; }

/* Checkbox rows */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  min-height: 24px;
}

.form-check input { margin-top: 0.15rem; flex-shrink: 0; }

/* Segmented control */
.segmented {
  display: flex;
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  padding: 0.25rem;
  border-radius: var(--radius-lg);
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.segmented button {
  flex: 1;
  min-height: 42px;
  padding: 0.55rem 0.5rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.segmented button:hover { color: var(--text-primary); }

.segmented button.active {
  background: var(--bg-card);
  color: var(--primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

/* Report card */
.report-course { margin-bottom: var(--space-lg); break-inside: avoid; }

.report-class-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.1rem;
  margin: var(--space-xl) 0 var(--space-md);
}

.report-class-heading:first-child { margin-top: 0; }

.report-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.25rem;
}

.report-summary .mini-stat-value { font-size: 1.45rem; }
.state-missed td { color: var(--text-muted); }

/* Review items */
.review-answer-box {
  background: var(--bg-glass);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  font-size: 0.92rem;
}

.review-answer-box .divider {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--border-color);
}

.review-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.82rem;
  font-weight: 700;
}

.review-question {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

@media (max-width: 640px) {
  .hide-sm { display: none; }
  .page-title { font-size: 1.6rem; }
  .user-pill-name { display: none; }
  .user-pill { padding-right: 0.5rem; }
  .btn { min-height: 44px; }
  .btn-sm { min-height: 38px; }
  .quiz-tile .btn { width: 100%; }
  .toast-container { right: 1rem; left: 1rem; }
  .toast { min-width: 0; }
}

@media print {
  .app-navbar, .app-footer, .no-print, .toast-container, .skip-link { display: none !important; }
  body { background: #ffffff; }
  main.main-content { padding: 0; }
  .card, .stat-card { box-shadow: none; }
  .table-container { overflow: visible; }
}

/* Live quiz countdowns ("Closes in 7:05") */
.countdown {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent-text);
}

.countdown.is-urgent { color: var(--danger); }