/* =============================================================
   LMS Theme Stylesheet
   =============================================================
   1. Variables & Reset
   2. Layout  (Topbar · Sidebar · Main)
   3. Components  (Cards · Buttons · Badges · Forms · Progress)
   4. Dashboard
   5. Course Navigation
   6. Chapter Splash
   7. Article Viewer
   8. Quiz / Exam  → lms-quiz.css
   9. Homework     → lms-homework.css
  10. Notifications
  11. Responsive
   ============================================================= */

/* ── 1. Variables & Reset ────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

[hidden] {
  display: none !important;
}

:root {
  --c-primary: #1b2d59;
  --c-primary-d: #152247;
  --c-primary-l: #e8eef8;
  --c-secondary: #c8e3f5;
  --c-success: #10b981;
  --c-success-l: #d1fae5;
  --c-warning: #f59e0b;
  --c-warning-l: #fef3c7;
  --c-danger: #ef4444;
  --c-danger-l: #fee2e2;
  --c-info: #0ea5e9;
  --c-info-l: #e0f2fe;
  --c-gray-50: #f8fafc;
  --c-gray-100: #f1f5f9;
  --c-gray-200: #e2e8f0;
  --c-gray-300: #cbd5e1;
  --c-gray-400: #94a3b8;
  --c-gray-500: #64748b;
  --c-gray-600: #475569;
  --c-gray-700: #334155;
  --c-gray-800: #1e293b;
  --c-gray-900: #0f172a;
  --c-white: #ffffff;

  --sidebar-w: 280px;
  --topbar-h: 64px;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.09), 0 4px 8px rgba(0, 0, 0, 0.06);
  --transition: all 0.2s ease;

  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-gray-800);
  background: var(--c-gray-50);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
}
a {
  text-decoration: none;
  color: var(--c-primary);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
input,
select,
textarea,
button {
  font: inherit;
}
ul,
ol {
  list-style: none;
}

/* ── 2. Layout ───────────────────────────────────────────────── */

/* Topbar */
.lms-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-h);
  background: var(--c-white);
  border-bottom: 1px solid var(--c-gray-200);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.lms-topbar__logo {
  width: auto;
  height: 50px;
  object-fit: contain;
  flex-shrink: 0;
}

.lms-topbar__brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--c-primary);
  flex-shrink: 0;
  letter-spacing: -0.02em;
}
.lms-topbar__context {
  flex: 1;
  font-size: 0.88rem;
  color: var(--c-gray-500);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 1rem;
}
.lms-topbar__user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
  flex-shrink: 0;
}
.lms-topbar__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-primary-l);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.lms-topbar__name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--c-gray-700);
}

/* Hamburger */
.lms-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.3rem;
  color: var(--c-gray-600);
  border-radius: var(--radius);
  transition: var(--transition);
}
.lms-hamburger:hover {
  background: var(--c-gray-100);
  color: var(--c-gray-800);
}
.lms-hamburger svg {
  width: 22px;
  height: 22px;
  display: block;
}

/* Layout wrapper */
.lms-layout {
  display: flex;
  padding-top: var(--topbar-h);
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
}

/* Sidebar */
.lms-sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--topbar-h));
  background: var(--c-gray-900);
  color: var(--c-gray-300);
  overflow-y: auto;
  overflow-x: hidden;
  transition: transform 0.3s ease;
  z-index: 90;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--c-gray-700) transparent;
}
.lms-sidebar::-webkit-scrollbar {
  width: 4px;
}
.lms-sidebar::-webkit-scrollbar-thumb {
  background: var(--c-gray-700);
  border-radius: 2px;
}

.lms-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 89;
  backdrop-filter: blur(3px);
}
.lms-sidebar-overlay.is-open {
  display: block;
}

/* Main */
.lms-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: calc(100vh - var(--topbar-h));
  padding: 2rem 2.25rem;
  background: var(--c-gray-50);
  overflow-y: auto;
}

/* Sidebar internal nav */
.lms-sidenav {
  padding: 1rem 0;
  flex: 1;
}

.lms-sidenav__section {
  padding: 1rem 1.25rem 0.35rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gray-600);
}

.lms-sidenav__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.25rem;
  color: var(--c-gray-400);
  font-size: 0.875rem;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  border-left: 3px solid transparent;
}
.lms-sidenav__link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--c-white);
  border-left-color: rgba(99, 102, 241, 0.5);
}
.lms-sidenav__link.is-active {
  background: rgba(99, 102, 241, 0.18);
  color: var(--c-white);
  border-left-color: var(--c-primary);
  font-weight: 500;
}
.lms-sidenav__icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.7;
}
.lms-sidenav__link.is-active .lms-sidenav__icon {
  opacity: 1;
}
.lms-sidenav__badge {
  margin-left: auto;
  font-size: 0.68rem;
  background: rgba(27, 45, 89, 0.3);
  color: #c8e3f5;
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
  font-weight: 600;
}

/* Sidenav dropdown item */
.lms-sidenav__item-row {
  display: flex;
  align-items: stretch;
}
.lms-sidenav__item-row .lms-sidenav__link {
  flex: 1;
  min-width: 0;
}
.lms-sidenav__dropdown-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-gray-500);
  padding: 0 0.75rem;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  transition: var(--transition);
}
.lms-sidenav__dropdown-btn:hover {
  color: var(--c-white);
}
.lms-sidenav__dropdown-arrow {
  width: 14px;
  height: 14px;
  transition: transform 0.25s ease;
}
.lms-sidenav__item--has-dropdown.is-open .lms-sidenav__dropdown-arrow {
  transform: rotate(90deg);
}
.lms-sidenav__dropdown {
  display: none;
}
.lms-sidenav__item--has-dropdown.is-open .lms-sidenav__dropdown {
  display: block;
}

/* Course tree */
.lms-course-tree {
  padding: 0.5rem 0 1rem;
}
.lms-tree-day {
  margin-bottom: 0.15rem;
}
.lms-tree-day__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem 0.55rem 1.25rem;
  cursor: pointer;
  color: var(--c-gray-500);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: var(--transition);
  user-select: none;
}
.lms-tree-day__header:hover {
  color: var(--c-gray-300);
}
.lms-tree-day__arrow {
  width: 14px;
  height: 14px;
  /* margin-left: auto; */
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.lms-tree-day.is-open .lms-tree-day__arrow {
  transform: rotate(90deg);
}
.lms-tree-day__chapters {
  display: none;
}
.lms-tree-day.is-open .lms-tree-day__chapters {
  display: block;
}

/* Course level */
.lms-tree-course {
  margin-bottom: 0.1rem;
}
.lms-tree-course__header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem 0.55rem 0.75rem;
  transition: var(--transition);
}
.lms-tree-course__header:hover {
  background: rgba(255, 255, 255, 0.04);
}
.lms-tree-course__toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--c-gray-500);
  display: flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 1;
  gap: 0.5rem;
}
.lms-tree-course__arrow {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.lms-tree-course.is-open .lms-tree-course__arrow {
  transform: rotate(90deg);
}
.lms-tree-course__title {
  flex: 1;
  min-width: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-gray-300);
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: var(--transition);
}
.lms-tree-course__title:hover {
  color: var(--c-white);
}
.lms-tree-course__days {
  display: none;
}
.lms-tree-course.is-open .lms-tree-course__days {
  display: block;
}

/* Chapter level */
.lms-tree-chapter {
  border-left: 3px solid transparent;
}
.lms-tree-chapter.is-active {
  border-left-color: var(--c-primary);
}
.lms-tree-chapter__header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.48rem 1rem 0.48rem 2rem;
  font-size: 0.83rem;
  color: var(--c-gray-400);
  transition: var(--transition);
}
.lms-tree-chapter__header:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--c-white);
}
.lms-tree-chapter.is-active .lms-tree-chapter__header {
  background: rgba(27, 45, 89, 0.18);
  color: #c8e3f5;
  font-weight: 500;
}
.lms-tree-chapter__toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  line-height: 1;
}
.lms-tree-chapter__spacer {
  width: 14px;
  flex-shrink: 0;
}
.lms-tree-chapter__arrow {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.lms-tree-chapter.is-open .lms-tree-chapter__arrow {
  transform: rotate(90deg);
}
.lms-tree-chapter__link {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: inherit;
  text-decoration: none;
}
.lms-tree-chapter__done {
  width: 13px;
  height: 13px;
  color: var(--c-success);
  margin-left: auto;
  flex-shrink: 0;
}
.lms-tree-chapter__articles {
  display: none;
}
.lms-tree-chapter.is-open .lms-tree-chapter__articles {
  display: block;
}

/* Article level */
.lms-tree-article {
  display: block;
  padding: 0.38rem 1rem 0.38rem 3.5rem;
  font-size: 0.8rem;
  color: var(--c-gray-500);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition);
}
.lms-tree-article:hover {
  color: var(--c-white);
  background: rgba(255, 255, 255, 0.04);
}

/* Sidebar footer */
.lms-sidebar__footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.lms-sidebar__footer a {
  color: var(--c-gray-500);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0;
  font-size: 0.85rem;
  transition: var(--transition);
}
.lms-sidebar__footer a:hover {
  color: var(--c-white);
}
.lms-sidebar__footer svg {
  width: 16px;
  height: 16px;
}
.lms-sidebar__footer-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-gray-500);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 0;
  font-size: 0.85rem;
  transition: var(--transition);
  width: 100%;
  text-align: left;
}
.lms-sidebar__footer-btn:hover {
  color: var(--c-white);
}
.lms-sidebar__footer-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Change Password Modal */
.lms-cp-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.lms-cp-modal.is-open {
  display: flex;
}
.lms-cp-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 30, 0.6);
  backdrop-filter: blur(4px);
}
.lms-cp-modal__container {
  position: relative;
  background: var(--c-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: clamp(320px, 90vw, 480px);
  max-height: 90vh;
  overflow-y: auto;
  z-index: 1;
}
.lms-cp-modal__header {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--c-gray-200);
}
.lms-cp-modal__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--c-primary-l);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.lms-cp-modal__icon svg {
  width: 20px;
  height: 20px;
}
.lms-cp-modal__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-gray-900);
  line-height: 1.2;
}
.lms-cp-modal__subtitle {
  font-size: 0.8rem;
  color: var(--c-gray-500);
  margin-top: 0.1rem;
}
.lms-cp-modal__close {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--c-gray-400);
  padding: 0.35rem;
  border-radius: var(--radius);
  transition: var(--transition);
  display: flex;
  flex-shrink: 0;
}
.lms-cp-modal__close:hover {
  background: var(--c-gray-100);
  color: var(--c-gray-700);
}
.lms-cp-modal__close svg {
  width: 18px;
  height: 18px;
  display: block;
}
.lms-cp-modal__body {
  padding: 1.5rem;
}
.lms-cp-field {
  margin-bottom: 1rem;
}
.lms-cp-field label {
  display: block;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--c-gray-700);
  margin-bottom: 0.35rem;
}
.lms-cp-field input {
  width: 100%;
  padding: 0.55rem 0.875rem;
  border: 1px solid var(--c-gray-300);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--c-gray-800);
  background: var(--c-white);
  transition: var(--transition);
  outline: none;
}
.lms-cp-field input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(27, 45, 89, 0.1);
}
.lms-cp-modal__error {
  background: var(--c-danger-l);
  color: var(--c-danger);
  border-radius: var(--radius);
  padding: 0.65rem 0.875rem;
  font-size: 0.825rem;
  margin-bottom: 1rem;
}
.lms-cp-modal__actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

/* ── 3. Components ───────────────────────────────────────────── */

/* Page header */
.lms-page-header {
  margin-bottom: 2rem;
}
.lms-page-header__title {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--c-gray-900);
  letter-spacing: -0.02em;
}
.lms-page-header__sub {
  color: var(--c-gray-500);
  font-size: 0.92rem;
  margin-top: 0.3rem;
}

/* Section header */
.lms-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}
.lms-section-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-gray-800);
}

/* Stat cards */
.lms-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.lms-stat {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.lms-stat__icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.lms-stat__icon svg {
  width: 24px;
  height: 24px;
}
.lms-stat__icon--primary {
  background: var(--c-primary-l);
  color: var(--c-primary);
}
.lms-stat__icon--success {
  background: var(--c-success-l);
  color: var(--c-success);
}
.lms-stat__icon--warning {
  background: var(--c-warning-l);
  color: var(--c-warning);
}
.lms-stat__icon--info {
  background: var(--c-info-l);
  color: var(--c-info);
}
.lms-stat__value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--c-gray-900);
  line-height: 1.1;
}
.lms-stat__label {
  font-size: 0.78rem;
  color: var(--c-gray-500);
  margin-top: 0.15rem;
}

/* Generic card */
.lms-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.lms-card__header {
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--c-gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.lms-card__title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-gray-800);
}
.lms-card__body {
  padding: 1.5rem;
}

/* Course card (grid) */
.lms-courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}
.lms-course-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  border: 1.5px solid transparent;
}
.lms-course-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--c-primary-l);
}

.lms-course-card__cover {
  background: linear-gradient(135deg, var(--c-primary) 0%, #8b5cf6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.8rem;
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}
.lms-course-card__cover-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lms-course-card__thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lms-course-card__body {
  padding: 1.2rem 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.lms-course-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-gray-800);
  margin-bottom: 0.35rem;
}
.lms-course-card__desc {
  font-size: 0.82rem;
  color: var(--c-gray-500);
  margin-bottom: 1rem;
  flex: 1;
  line-height: 1.5;
}
.lms-course-card__footer {
  border-top: 1px solid var(--c-gray-100);
  padding-top: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--c-gray-500);
}
.lms-course-card__pct {
  font-weight: 700;
  color: var(--c-primary);
}

/* Progress bar */
.lms-progress {
  height: 6px;
  background: var(--c-gray-200);
  border-radius: 999px;
  overflow: hidden;
}
.lms-progress__fill {
  height: 100%;
  border-radius: 999px;
  transition: width 0.5s ease;
  background: var(--c-primary);
}
.lms-progress__fill--success {
  background: var(--c-success);
}
.lms-progress--lg {
  height: 10px;
}
.lms-progress--sm {
  height: 4px;
}
.lms-progress-label {
  font-size: 0.75rem;
  color: var(--c-gray-500);
  text-align: right;
  margin-top: 0.2rem;
}

/* Buttons */
.lms-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  line-height: 1;
  white-space: nowrap;
  text-align: center;
  justify-content: center;
}
.lms-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}
.lms-btn svg {
  width: 17px;
  height: 17px;
}
.lms-btn--primary {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}
.lms-btn--primary:hover {
  background: var(--c-primary-d);
  border-color: var(--c-primary-d);
}
.lms-btn--success {
  background: var(--c-success);
  color: #fff;
  border-color: var(--c-success);
}
.lms-btn--success:hover {
  background: #059669;
  border-color: #059669;
}
.lms-btn--ghost {
  background: transparent;
  color: var(--c-gray-600);
  border-color: var(--c-gray-200);
}
.lms-btn--ghost:hover {
  background: var(--c-gray-100);
  color: var(--c-gray-800);
  border-color: var(--c-gray-300);
}
.lms-btn--danger {
  background: var(--c-danger);
  color: #fff;
  border-color: var(--c-danger);
}
.lms-btn--sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}
.lms-btn--lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}
.lms-btn--block {
  width: 100%;
}
.lms-btn--icon-only {
  padding: 0.6rem;
}

/* Badges */
.lms-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.4;
}
.lms-badge--primary {
  background: var(--c-primary-l);
  color: var(--c-primary-d);
}
.lms-badge--success {
  background: var(--c-success-l);
  color: #065f46;
}
.lms-badge--warning {
  background: var(--c-warning-l);
  color: #92400e;
}
.lms-badge--danger {
  background: var(--c-danger-l);
  color: #991b1b;
}
.lms-badge--gray {
  background: var(--c-gray-100);
  color: var(--c-gray-600);
}

/* Form elements */
.lms-form-group {
  margin-bottom: 1.25rem;
}
.lms-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-gray-700);
  margin-bottom: 0.4rem;
}
.lms-input,
.lms-textarea {
  width: 100%;
  padding: 0.65rem 1rem;
  border: 1.5px solid var(--c-gray-200);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--c-gray-800);
  background: var(--c-white);
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
.lms-input:focus,
.lms-textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.lms-textarea {
  resize: vertical;
  min-height: 130px;
  line-height: 1.6;
}

/* Breadcrumb */
.lms-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--c-gray-400);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.lms-breadcrumb a {
  color: var(--c-gray-500);
}
.lms-breadcrumb a:hover {
  color: var(--c-primary);
}
.lms-breadcrumb__sep {
  color: var(--c-gray-300);
}

/* Empty state */
.lms-empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--c-gray-400);
}
.lms-empty__icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}
.lms-empty__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--c-gray-500);
}
.lms-empty__text {
  font-size: 0.88rem;
}

/* No-courses empty state (page-course.php) */
.lms-no-courses {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--c-gray-400);
}
.lms-no-courses__icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 0.75rem;
}
.lms-no-courses__text {
  font-size: 0.9rem;
  color: var(--c-gray-400);
}

/* Notice / alert block */
.lms-notice {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  border-left: 4px solid;
  background: var(--lms-notice-bg);
  border-color: var(--lms-notice-border);
}
.lms-notice--success {
  --lms-notice-bg: var(--c-success-l);
  --lms-notice-border: var(--c-success);
}
.lms-notice--warning {
  --lms-notice-bg: var(--c-warning-l);
  --lms-notice-border: var(--c-warning);
}
.lms-notice--error {
  --lms-notice-bg: var(--c-danger-l);
  --lms-notice-border: var(--c-danger);
}
.lms-notice--info {
  --lms-notice-bg: var(--c-info-l);
  --lms-notice-border: var(--c-info);
}
.lms-notice__icon {
  font-size: 3rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 1px;
}
.lms-notice__body {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.lms-notice__heading {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-gray-800);
  margin: 0;
}
.lms-notice__desc {
  font-size: 0.83rem;
  color: var(--c-gray-500);
  margin: 0;
  line-height: 1.5;
}

/* Loading skeleton */
.lms-skeleton {
  background: linear-gradient(
    90deg,
    var(--c-gray-100) 25%,
    var(--c-gray-200) 50%,
    var(--c-gray-100) 75%
  );
  background-size: 200% 100%;
  animation: lms-shimmer 1.4s infinite;
  border-radius: var(--radius);
}
@keyframes lms-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}
.lms-skeleton--h1 {
  height: 1.6rem;
  width: 55%;
  margin-bottom: 0.75rem;
}
.lms-skeleton--text {
  height: 0.9rem;
  margin-bottom: 0.5rem;
}
.lms-skeleton--text:last-child {
  width: 70%;
}
.lms-skeleton--card {
  height: 180px;
}

/* Loading spinner */
.lms-spinner-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}
.lms-spinner {
  width: 36px;
  height: 36px;
  border: 3.5px solid var(--c-gray-200);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: lms-spin 0.75s linear infinite;
}
@keyframes lms-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── 4. Dashboard ────────────────────────────────────────────── */
.lms-welcome-banner {
  background: linear-gradient(135deg, var(--c-primary) 0%, #8b5cf6 100%);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  color: #fff;
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}
.lms-welcome-banner::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 280px;
  height: 280px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 50%;
}
.lms-welcome-banner__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.lms-welcome-banner__sub {
  opacity: 0.8;
  font-size: 0.9rem;
}

/* ── 5. Course Navigation ────────────────────────────────────── */
.lms-course-hero {
  background: linear-gradient(135deg, var(--c-primary) 0%, #7c3aed 100%);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  color: #fff;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
}
.lms-course-hero::after {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 240px;
  height: 240px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}
.lms-course-hero__title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  position: relative;
}
.lms-course-hero__meta {
  opacity: 0.8;
  font-size: 0.85rem;
  position: relative;
}

/* Course content panel states */
.lms-panel {
  display: none;
}
.lms-panel.is-active {
  display: block;
}

/* ── 6. Chapter Splash ───────────────────────────────────────── */
.lms-chapter-splash {
  max-width: 740px;
}

.lms-chapter-hero {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.75rem;
  position: relative;
  min-height: 220px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: flex-end;
}
.lms-chapter-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.lms-chapter-hero__overlay {
  position: relative;
  z-index: 1;
  padding: 1.75rem 2rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.65) 0%, transparent 100%);
  width: 100%;
}
.lms-chapter-hero__title {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
}
.lms-chapter-hero__meta {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.82rem;
  margin-top: 0.25rem;
}

/* Action cards (E-learning / Homework / Practice) */
.lms-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.lms-action {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.lms-action:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--c-primary);
}
.lms-action.is-locked {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.lms-action__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lms-action__icon svg {
  width: 28px;
  height: 28px;
}
.lms-action__icon--elearning {
  background: var(--c-primary-l);
  color: var(--c-primary);
}
.lms-action__icon--homework {
  background: var(--c-warning-l);
  color: var(--c-warning);
}
.lms-action__icon--practice {
  background: var(--c-success-l);
  color: var(--c-success);
}
.lms-action__title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--c-gray-800);
}
.lms-action__desc {
  font-size: 0.77rem;
  color: var(--c-gray-500);
  line-height: 1.4;
}

/* ── 7. Article Viewer ───────────────────────────────────────── */
.lms-article-wrap {
  max-width: 800px;
}
.lms-article-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--c-gray-200);
  gap: 1rem;
}
.lms-article-topbar__info {
  font-size: 0.82rem;
  color: var(--c-gray-500);
}
.lms-article-topbar__nav {
  display: flex;
  gap: 0.5rem;
}
.lms-article-progress {
  margin-bottom: 1.5rem;
}

.lms-article-body {
  /* background: var(--c-white); */
  /* border-radius: var(--radius-lg); */
  /* padding: 2.5rem; */
  /* box-shadow: var(--shadow); */
  line-height: 1.85;
  color: var(--c-gray-700);
  font-size: 0.97rem;
}
.lms-article-body h1,
.lms-article-body h2,
.lms-article-body h3 {
  color: var(--c-gray-900);
  margin: 1.6em 0 0.65em;
  font-weight: 700;
  line-height: 1.3;
}
.lms-article-body h1 {
  font-size: 1.6rem;
}
.lms-article-body h2 {
  font-size: 1.3rem;
}
.lms-article-body h3 {
  font-size: 1.1rem;
}
.lms-article-body p {
  margin-bottom: 1.1em;
}
.lms-article-body img {
  border-radius: var(--radius);
  margin: 1.5em 0;
  box-shadow: var(--shadow);
  max-width: 100%;
}
.lms-article-body ul,
.lms-article-body ol {
  padding-left: 1.75rem;
  margin-bottom: 1em;
}
.lms-article-body li {
  margin-bottom: 0.4em;
}
.lms-article-body ul li {
  list-style: disc;
}
.lms-article-body ol li {
  list-style: decimal;
}
.lms-article-body blockquote {
  border-left: 4px solid var(--c-primary);
  padding-left: 1.25rem;
  margin: 1.5em 0;
  font-style: italic;
  color: var(--c-gray-500);
}
.lms-article-body video,
.lms-article-body iframe {
  border-radius: var(--radius);
  max-width: 100%;
  margin: 1.5em auto;
  display: block;
}
.lms-article-body code {
  background: var(--c-gray-100);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
}
.lms-article-body pre {
  background: var(--c-gray-900);
  color: #e2e8f0;
  padding: 1.25rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5em 0;
}
.lms-article-body pre code {
  background: none;
  padding: 0;
  font-size: 0.88rem;
}

.lms-article-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 1.5rem;
  gap: 1rem;
}

/* ── 8. Quiz / Exam — see lms-quiz.css ──────────────────────── */

/* ── 9. Homework — see lms-homework.css ──────────────────────── */

/* ── 10. Notifications ───────────────────────────────────────── */
.lms-toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.9rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  font-weight: 500;
  z-index: 9999;
  animation: lms-toast-in 0.3s ease;
  max-width: 360px;
  line-height: 1.4;
}
.lms-toast--info {
  background: var(--c-primary);
  color: #fff;
}
.lms-toast--success {
  background: var(--c-success);
  color: #fff;
}
.lms-toast--warning {
  background: var(--c-warning);
  color: #fff;
}
.lms-toast--error {
  background: var(--c-danger);
  color: #fff;
}
@keyframes lms-toast-in {
  from {
    transform: translateY(0.75rem);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}

/* ── 11. Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .lms-main {
    padding: 1.5rem;
  }
}

@media (max-width: 768px) {
  .lms-hamburger {
    display: flex;
  }

  .lms-sidebar {
    transform: translateX(-100%);
  }
  .lms-sidebar.is-open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
  }

  .lms-main {
    margin-left: 0;
    padding: 1rem;
  }
  .lms-topbar__context {
    display: none;
  }

  .lms-stats {
    grid-template-columns: 1fr 1fr;
  }
  .lms-courses-grid {
    grid-template-columns: 1fr;
  }
  .lms-actions {
    grid-template-columns: 1fr;
  }
  .lms-article-body {
    padding: 1.5rem;
  }
  .lms-course-hero {
    padding: 1.5rem;
  }
  .lms-article-footer {
    flex-direction: column-reverse;
  }
}

@media (max-width: 480px) {
  .lms-stats {
    grid-template-columns: 1fr;
  }
  .lms-topbar {
    padding: 0 1rem;
  }
  .lms-main {
    padding: 0.75rem;
  }
  .lms-welcome-banner {
    padding: 1.5rem;
  }
  .lms-chapter-hero__overlay {
    padding: 1.25rem;
  }
}

/* ── Login page (/inloggen/) ─────────────────────────────────── */
.lms-login-page {
  background: var(--c-gray-100);
}
.lms-login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}
.lms-login-card {
  background: var(--c-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2.5rem 2.25rem;
  width: 100%;
  max-width: 400px;
}
.lms-login-card__brand {
  display: flex;
  justify-content: center;
  margin-bottom: 1.75rem;
}
.lms-login-card__brand img {
  height: 48px;
  width: auto;
  object-fit: contain;
}
.lms-login-card__brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--c-primary);
  letter-spacing: -0.03em;
}
.lms-login-card__heading {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-gray-800);
  margin-bottom: 0.25rem;
  text-align: center;
}
.lms-login-card__sub {
  font-size: 0.85rem;
  color: var(--c-gray-400);
  text-align: center;
  margin-bottom: 1.75rem;
}
.lms-login-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.lms-login-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.lms-login-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-gray-600);
}
.lms-login-input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1.5px solid var(--c-gray-200);
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--c-gray-800);
  background: var(--c-white);
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
  outline: none;
}
.lms-login-input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-primary-l);
}
.lms-login-remember {
  font-size: 0.83rem;
  color: var(--c-gray-500);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.lms-login-remember label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
}
.lms-login-btn {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--c-primary);
  color: var(--c-white);
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background 0.15s ease,
    transform 0.1s ease;
  margin-top: 0.25rem;
}
.lms-login-btn:hover {
  background: var(--c-primary-d);
}
.lms-login-btn:active {
  transform: scale(0.98);
}
.lms-login-card .lms-notice {
  margin-bottom: 0.25rem;
}

/* Forgot / reset password shared elements */
.lms-rp-error {
  background: var(--c-danger-l);
  color: var(--c-danger);
  border-radius: var(--radius);
  padding: 0.6rem 0.875rem;
  font-size: 0.825rem;
}
.lms-rp-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
  padding: 1.5rem 0.5rem 0.5rem;
}
.lms-rp-success svg {
  width: 40px;
  height: 40px;
  color: var(--c-success);
  margin-bottom: 0.25rem;
}
.lms-rp-success strong {
  font-size: 1rem;
  color: var(--c-gray-800);
}
.lms-rp-success span {
  font-size: 0.85rem;
  color: var(--c-gray-500);
  line-height: 1.5;
}
.lms-rp-notice {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}
.lms-rp-notice svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 0.1rem;
}
.lms-rp-notice--error {
  background: var(--c-danger-l);
  color: var(--c-danger);
}
.lms-rp-back {
  display: block;
  text-align: center;
  margin-top: 1.25rem;
  font-size: 0.83rem;
  color: var(--c-gray-400);
  transition: var(--transition);
}
.lms-rp-back:hover {
  color: var(--c-primary);
}

/* ── Article media sections ──────────────────────────────────────────────── */
.lms-article-media {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-gray-200);
}

.lms-article-media__heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-gray-700);
  margin: 0 0 1rem;
}

/* Image gallery */
.lms-article-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
}
.lms-article-gallery__item {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-gray-200);
  transition: var(--transition);
}
.lms-article-gallery__item:hover {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 2px var(--c-primary-l);
}
.lms-article-gallery__item img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  display: block;
}

/* Video player */
.lms-article-video-wrap {
  margin-bottom: 1.25rem;
}
.lms-article-media__filename {
  font-size: 0.82rem;
  color: var(--c-gray-500);
  margin: 0 0 0.35rem;
}
.lms-article-video {
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius);
  background: #000;
  display: block;
}

/* PDF download links */
.lms-article-pdf-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.lms-article-pdf-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background: var(--c-gray-50, #f8fafc);
  border: 1px solid var(--c-gray-200);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--c-gray-700);
  text-decoration: none;
  transition: var(--transition);
  width: fit-content;
}
.lms-article-pdf-link:hover {
  background: var(--c-primary-l, #eff6ff);
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.lms-article-pdf-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--c-primary);
}