/* ============================================================
   LEARNHUB LMS — Learning Management System
   A complete SaaS LMS design system
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  --lms-bg: #FFFFFF;
  --lms-surface: #F7F7F5;
  --lms-surface-hover: #EFEFED;
  --lms-border: #E5E5E5;
  --lms-border-strong: #D1D1D1;
  --lms-text: #37352F;
  --lms-text-secondary: #6B7280;
  --lms-text-muted: #9CA3AF;
  --lms-accent: #37352F;
  --lms-accent-light: #F7F7F5;
  --lms-success: #22c55e;
  --lms-success-light: #dcfce7;
  --lms-warning: #f59e0b;
  --lms-warning-light: #fef3c7;
  --lms-danger: #ef4444;
  --lms-danger-light: #fee2e2;
  --lms-info: #3b82f6;
  --lms-info-light: #dbeafe;
  --lms-purple: #8b5cf6;
  --lms-purple-light: #f3e8ff;
  --lms-sidebar-w: 240px;
  --lms-topbar-h: 56px;
  --lms-radius: 10px;
  --lms-radius-sm: 6px;
  --lms-radius-lg: 14px;
  --lms-shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --lms-shadow: 0 2px 8px rgba(0,0,0,.06);
  --lms-shadow-lg: 0 8px 24px rgba(0,0,0,.1);
  --lms-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --lms-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --lms-transition: .2s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--lms-font);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--lms-text);
  background: var(--lms-surface);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: var(--lms-font); cursor: pointer; }
select, input, textarea { font-family: var(--lms-font); }

/* ---------- App Layout ---------- */
.lms-app { min-height: 100vh; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.lms-sidebar {
  width: var(--lms-sidebar-w);
  background: var(--lms-bg);
  border-right: 1px solid var(--lms-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
  transition: transform .3s ease;
}
.lms-sidebar__brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: 1rem 1.2rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--lms-text);
  border-bottom: 1px solid var(--lms-border);
  letter-spacing: -.01em;
}
.lms-sidebar__brand i { font-size: 1.2rem; }
.lms-sidebar__brand small {
  font-size: .6rem;
  font-weight: 500;
  background: var(--lms-accent);
  color: #fff;
  padding: .1rem .35rem;
  border-radius: 3px;
  margin-left: auto;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.lms-sidebar__nav {
  flex: 1;
  padding: .8rem .6rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.lms-nav-section {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--lms-text-muted);
  padding: .8rem .6rem .3rem;
}
.lms-nav-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .7rem;
  border-radius: var(--lms-radius-sm);
  font-size: .82rem;
  font-weight: 500;
  color: var(--lms-text-secondary);
  transition: all var(--lms-transition);
  position: relative;
  white-space: nowrap;
}
.lms-nav-item:hover {
  background: var(--lms-surface);
  color: var(--lms-text);
}
.lms-nav-item.is-active {
  background: var(--lms-accent);
  color: #fff;
}
.lms-nav-item i { font-size: 1rem; flex-shrink: 0; }
.lms-nav-badge {
  margin-left: auto;
  background: var(--lms-danger);
  color: #fff;
  font-size: .6rem;
  font-weight: 600;
  padding: .1rem .4rem;
  border-radius: 99px;
  min-width: 18px;
  text-align: center;
}
.lms-sidebar__footer {
  padding: .6rem;
  border-top: 1px solid var(--lms-border);
}

/* ============================================================
   MAIN AREA
   ============================================================ */
.lms-main {
  margin-left: var(--lms-sidebar-w);
  min-height: 100vh;
  transition: margin .3s ease;
}

/* ============================================================
   TOPBAR
   ============================================================ */
.lms-topbar {
  height: var(--lms-topbar-h);
  background: var(--lms-bg);
  border-bottom: 1px solid var(--lms-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
}
.lms-topbar__left { display: flex; align-items: center; gap: .75rem; }
.lms-topbar__title {
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: -.01em;
}
.lms-topbar__breadcrumb {
  font-size: .72rem;
  color: var(--lms-text-muted);
  background: var(--lms-surface);
  padding: .15rem .5rem;
  border-radius: 99px;
}
.lms-topbar__right {
  display: flex;
  align-items: center;
  gap: .6rem;
}

/* Role Selector */
.lms-role-select {
  appearance: none;
  background: var(--lms-surface);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-sm);
  padding: .35rem .7rem;
  font-size: .78rem;
  font-weight: 500;
  color: var(--lms-text);
  cursor: pointer;
  transition: border-color var(--lms-transition);
  outline: none;
}
.lms-role-select:focus { border-color: var(--lms-accent); }

/* Notification Button */
.lms-notif-btn {
  position: relative;
  background: none;
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-sm);
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  font-size: .95rem;
  color: var(--lms-text-secondary);
  transition: all var(--lms-transition);
}
.lms-notif-btn:hover { border-color: var(--lms-accent); color: var(--lms-text); }
.lms-notif-badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--lms-danger);
  color: #fff;
  font-size: .55rem;
  font-weight: 700;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}

/* ============================================================
   CONTENT
   ============================================================ */
.lms-content {
  padding: 1.5rem;
  max-width: 1280px;
  animation: lmsFadeIn .25s ease;
}
@keyframes lmsFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   STAT CARDS
   ============================================================ */
.lms-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.lms-stat {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  padding: 1.2rem;
  transition: all var(--lms-transition);
}
.lms-stat:hover { border-color: var(--lms-border-strong); transform: translateY(-2px); box-shadow: var(--lms-shadow); }
.lms-stat__header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .6rem; }
.lms-stat__icon {
  width: 32px; height: 32px;
  border-radius: var(--lms-radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
}
.lms-stat__icon--primary { background: var(--lms-accent-light); color: var(--lms-accent); }
.lms-stat__icon--success { background: var(--lms-success-light); color: var(--lms-success); }
.lms-stat__icon--warning { background: var(--lms-warning-light); color: var(--lms-warning); }
.lms-stat__icon--info { background: var(--lms-info-light); color: var(--lms-info); }
.lms-stat__icon--purple { background: var(--lms-purple-light); color: var(--lms-purple); }
.lms-stat__icon--danger { background: var(--lms-danger-light); color: var(--lms-danger); }
.lms-stat__trend {
  font-size: .65rem;
  font-weight: 600;
  padding: .1rem .35rem;
  border-radius: 99px;
}
.lms-stat__trend--up { background: var(--lms-success-light); color: var(--lms-success); }
.lms-stat__trend--down { background: var(--lms-danger-light); color: var(--lms-danger); }
.lms-stat__value { font-size: 1.5rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.2; }
.lms-stat__label { font-size: .72rem; color: var(--lms-text-muted); margin-top: .15rem; }

/* ============================================================
   CARDS / PANELS
   ============================================================ */
.lms-card {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  overflow: hidden;
  margin-bottom: 1rem;
}
.lms-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--lms-border);
}
.lms-card__title { font-size: .85rem; font-weight: 700; }
.lms-card__body { padding: 1.2rem; }

/* ============================================================
   GRID LAYOUTS
   ============================================================ */
.lms-grid { display: grid; gap: 1rem; }
.lms-grid--2 { grid-template-columns: repeat(2, 1fr); }
.lms-grid--3 { grid-template-columns: repeat(3, 1fr); }
.lms-grid--4 { grid-template-columns: repeat(4, 1fr); }
.lms-grid--sidebar { grid-template-columns: 1fr 320px; }

/* ============================================================
   TABLE
   ============================================================ */
.lms-table-wrap { overflow-x: auto; }
.lms-table { width: 100%; border-collapse: collapse; }
.lms-table th {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--lms-text-muted);
  padding: .7rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--lms-border);
  background: var(--lms-surface);
  white-space: nowrap;
}
.lms-table td {
  padding: .7rem 1rem;
  font-size: .8rem;
  border-bottom: 1px solid var(--lms-border);
  vertical-align: middle;
}
.lms-table tr:last-child td { border-bottom: none; }
.lms-table tr:hover td { background: var(--lms-surface); }

/* ============================================================
   BADGES
   ============================================================ */
.lms-badge {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .15rem .5rem;
  border-radius: 99px;
  font-size: .65rem;
  font-weight: 600;
  white-space: nowrap;
}
.lms-badge--success { background: var(--lms-success-light); color: var(--lms-success); }
.lms-badge--warning { background: var(--lms-warning-light); color: var(--lms-warning); }
.lms-badge--danger { background: var(--lms-danger-light); color: var(--lms-danger); }
.lms-badge--info { background: var(--lms-info-light); color: var(--lms-info); }
.lms-badge--purple { background: var(--lms-purple-light); color: var(--lms-purple); }
.lms-badge--default { background: var(--lms-surface); color: var(--lms-text-secondary); }

/* ============================================================
   BUTTONS
   ============================================================ */
.lms-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .45rem .85rem;
  border-radius: var(--lms-radius-sm);
  font-size: .78rem;
  font-weight: 600;
  border: 1px solid var(--lms-border);
  background: var(--lms-bg);
  color: var(--lms-text);
  transition: all var(--lms-transition);
  cursor: pointer;
  white-space: nowrap;
}
.lms-btn:hover { border-color: var(--lms-border-strong); transform: translateY(-1px); box-shadow: var(--lms-shadow-sm); }
.lms-btn--primary { background: var(--lms-accent); color: #fff; border-color: var(--lms-accent); }
.lms-btn--primary:hover { opacity: .9; }
.lms-btn--success { background: var(--lms-success); color: #fff; border-color: var(--lms-success); }
.lms-btn--danger { background: var(--lms-danger); color: #fff; border-color: var(--lms-danger); }
.lms-btn--sm { padding: .3rem .6rem; font-size: .72rem; }
.lms-btn--ghost { border-color: transparent; background: transparent; }
.lms-btn--ghost:hover { background: var(--lms-surface); }

/* ============================================================
   FORMS
   ============================================================ */
.lms-form-group { margin-bottom: 1rem; }
.lms-label {
  display: block;
  font-size: .72rem;
  font-weight: 600;
  color: var(--lms-text-secondary);
  margin-bottom: .3rem;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.lms-input, .lms-select, .lms-textarea {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-sm);
  font-size: .82rem;
  color: var(--lms-text);
  background: var(--lms-bg);
  transition: border-color var(--lms-transition);
  outline: none;
}
.lms-input:focus, .lms-select:focus, .lms-textarea:focus {
  border-color: var(--lms-accent);
}
.lms-textarea { resize: vertical; min-height: 80px; }
.lms-select { appearance: none; cursor: pointer; }

/* ============================================================
   AVATARS
   ============================================================ */
.lms-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.lms-avatar--lg { width: 44px; height: 44px; font-size: .85rem; }
.lms-avatar--sm { width: 26px; height: 26px; font-size: .6rem; }
.lms-avatar--a { background: #6366f1; }
.lms-avatar--b { background: #8b5cf6; }
.lms-avatar--c { background: #ec4899; }
.lms-avatar--d { background: #f59e0b; }
.lms-avatar--e { background: #22c55e; }
.lms-avatar--f { background: #3b82f6; }
.lms-avatar--g { background: #ef4444; }
.lms-avatar--h { background: #14b8a6; }

/* ============================================================
   PROGRESS BAR
   ============================================================ */
.lms-progress {
  background: var(--lms-surface);
  border-radius: 99px;
  height: 6px;
  overflow: hidden;
  width: 100%;
}
.lms-progress__bar {
  height: 100%;
  border-radius: 99px;
  background: var(--lms-accent);
  transition: width .5s ease;
}
.lms-progress__bar--success { background: var(--lms-success); }
.lms-progress__bar--info { background: var(--lms-info); }
.lms-progress__bar--warning { background: var(--lms-warning); }

/* ============================================================
   CHARTS (CSS-only bar charts)
   ============================================================ */
.lms-chart { display: flex; align-items: flex-end; gap: .5rem; height: 140px; padding-top: 1rem; }
.lms-chart__bar {
  flex: 1;
  background: var(--lms-accent);
  border-radius: 4px 4px 0 0;
  transition: height .5s ease;
  position: relative;
  min-width: 0;
  opacity: .7;
}
.lms-chart__bar:hover { opacity: 1; }
.lms-chart__bar--accent { background: var(--lms-info); }
.lms-chart__label {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: .55rem;
  color: var(--lms-text-muted);
  white-space: nowrap;
}

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */
.lms-toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column-reverse;
  gap: .5rem;
}
.lms-toast {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  padding: .75rem 1rem;
  box-shadow: var(--lms-shadow-lg);
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .78rem;
  max-width: 340px;
  animation: lmsToastIn .3s ease;
  transition: all .3s ease;
}
.lms-toast.is-leaving { opacity: 0; transform: translateX(100%); }
.lms-toast__icon { font-size: 1rem; flex-shrink: 0; }
.lms-toast--success .lms-toast__icon { color: var(--lms-success); }
.lms-toast--danger .lms-toast__icon { color: var(--lms-danger); }
.lms-toast--info .lms-toast__icon { color: var(--lms-info); }
.lms-toast--warning .lms-toast__icon { color: var(--lms-warning); }
@keyframes lmsToastIn {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   MODALS
   ============================================================ */
.lms-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.35);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: lmsFadeIn .2s ease;
  padding: 1rem;
}
.lms-modal {
  background: var(--lms-bg);
  border-radius: var(--lms-radius-lg);
  box-shadow: var(--lms-shadow-lg);
  width: min(100%, 560px);
  max-height: 85vh;
  overflow-y: auto;
  animation: lmsSlideUp .25s ease;
}
@keyframes lmsSlideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.lms-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--lms-border);
}
.lms-modal__title { font-size: .9rem; font-weight: 700; }
.lms-modal__close {
  background: none; border: none;
  font-size: 1.1rem;
  color: var(--lms-text-muted);
  padding: .2rem;
  cursor: pointer;
  transition: color var(--lms-transition);
}
.lms-modal__close:hover { color: var(--lms-text); }
.lms-modal__body { padding: 1.25rem; }
.lms-modal__footer {
  display: flex; justify-content: flex-end; gap: .5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--lms-border);
}

/* ============================================================
   COURSE CARDS
   ============================================================ */
.lms-course-card {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  overflow: hidden;
  transition: all var(--lms-transition);
}
.lms-course-card:hover {
  border-color: var(--lms-border-strong);
  transform: translateY(-2px);
  box-shadow: var(--lms-shadow);
}
.lms-course-card__thumb {
  height: 140px;
  background: var(--lms-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.lms-course-card__thumb-icon {
  font-size: 2.5rem;
  color: var(--lms-text-muted);
  opacity: .4;
}
.lms-course-card__thumb-badge {
  position: absolute;
  top: .5rem; left: .5rem;
}
.lms-course-card__body { padding: 1rem; }
.lms-course-card__category {
  font-size: .6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--lms-info);
  margin-bottom: .3rem;
}
.lms-course-card__title {
  font-size: .85rem;
  font-weight: 700;
  margin-bottom: .35rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lms-course-card__meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .68rem;
  color: var(--lms-text-muted);
  margin-bottom: .6rem;
}
.lms-course-card__meta i { font-size: .72rem; }
.lms-course-card__footer {
  padding: .75rem 1rem;
  border-top: 1px solid var(--lms-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.lms-course-card__price {
  font-size: .9rem;
  font-weight: 700;
  color: var(--lms-text);
}
.lms-course-card__instructor {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .68rem;
  color: var(--lms-text-secondary);
}

/* ============================================================
   LESSON / CONTENT BUILDER
   ============================================================ */
.lms-builder { display: grid; grid-template-columns: 300px 1fr; gap: 1rem; }
.lms-builder__sidebar { min-width: 0; }
.lms-builder__main { min-width: 0; }

.lms-section-block {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  margin-bottom: .75rem;
  overflow: hidden;
}
.lms-section-block__header {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem .85rem;
  background: var(--lms-surface);
  border-bottom: 1px solid var(--lms-border);
  cursor: pointer;
  user-select: none;
}
.lms-section-block__header:hover { background: var(--lms-surface-hover); }
.lms-section-block__toggle {
  font-size: .7rem;
  color: var(--lms-text-muted);
  transition: transform .2s ease;
}
.lms-section-block.is-collapsed .lms-section-block__toggle { transform: rotate(-90deg); }
.lms-section-block__title {
  font-size: .78rem;
  font-weight: 600;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lms-section-block__count {
  font-size: .6rem;
  color: var(--lms-text-muted);
  background: var(--lms-bg);
  padding: .1rem .35rem;
  border-radius: 99px;
  border: 1px solid var(--lms-border);
}
.lms-section-block__actions {
  display: flex;
  gap: .2rem;
}
.lms-section-block__actions button {
  background: none; border: none;
  font-size: .78rem;
  color: var(--lms-text-muted);
  padding: .15rem;
  cursor: pointer;
  border-radius: 3px;
  transition: all .15s ease;
}
.lms-section-block__actions button:hover { color: var(--lms-text); background: var(--lms-bg); }
.lms-section-block__body {
  padding: .4rem 0;
}
.lms-section-block.is-collapsed .lms-section-block__body { display: none; }

.lms-lesson-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .85rem;
  font-size: .75rem;
  color: var(--lms-text-secondary);
  cursor: pointer;
  transition: background .15s ease;
  border-left: 3px solid transparent;
}
.lms-lesson-item:hover { background: var(--lms-surface); }
.lms-lesson-item.is-active {
  background: var(--lms-accent-light);
  color: var(--lms-text);
  border-left-color: var(--lms-accent);
  font-weight: 600;
}
.lms-lesson-item__icon { font-size: .8rem; flex-shrink: 0; }
.lms-lesson-item__title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lms-lesson-item__duration { font-size: .6rem; color: var(--lms-text-muted); }
.lms-lesson-item__drag {
  font-size: .7rem;
  color: var(--lms-text-muted);
  cursor: grab;
  opacity: 0;
  transition: opacity .15s ease;
}
.lms-lesson-item:hover .lms-lesson-item__drag { opacity: 1; }

/* ============================================================
   COURSE PLAYER (STUDENT VIEW)
   ============================================================ */
.lms-player { display: grid; grid-template-columns: 1fr 320px; gap: 0; min-height: calc(100vh - var(--lms-topbar-h)); }
.lms-player__video {
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  position: relative;
}
.lms-player__placeholder {
  text-align: center;
  color: #666;
}
.lms-player__placeholder i { font-size: 3rem; display: block; margin-bottom: .5rem; }
.lms-player__placeholder span { font-size: .8rem; }
.lms-player__sidebar-panel {
  background: var(--lms-bg);
  border-left: 1px solid var(--lms-border);
  overflow-y: auto;
  max-height: calc(100vh - var(--lms-topbar-h));
}
.lms-player__lesson-info { padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--lms-border); }
.lms-player__lesson-title { font-size: 1rem; font-weight: 700; margin-bottom: .3rem; }
.lms-player__lesson-desc { font-size: .78rem; color: var(--lms-text-secondary); line-height: 1.6; }

/* ============================================================
   ACTIVITY FEED
   ============================================================ */
.lms-activity { list-style: none; }
.lms-activity__item {
  display: flex;
  gap: .6rem;
  padding: .65rem 0;
  border-bottom: 1px solid var(--lms-border);
  font-size: .78rem;
}
.lms-activity__item:last-child { border-bottom: none; }
.lms-activity__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: .3rem;
}
.lms-activity__dot--success { background: var(--lms-success); }
.lms-activity__dot--info { background: var(--lms-info); }
.lms-activity__dot--warning { background: var(--lms-warning); }
.lms-activity__dot--purple { background: var(--lms-purple); }
.lms-activity__text { flex: 1; color: var(--lms-text-secondary); }
.lms-activity__text strong { color: var(--lms-text); font-weight: 600; }
.lms-activity__time { font-size: .65rem; color: var(--lms-text-muted); white-space: nowrap; }

/* ============================================================
   EMPTY STATE
   ============================================================ */
.lms-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--lms-text-muted);
}
.lms-empty i { font-size: 2.5rem; margin-bottom: .5rem; display: block; opacity: .4; }
.lms-empty__title { font-size: .85rem; font-weight: 600; color: var(--lms-text-secondary); margin-bottom: .2rem; }
.lms-empty__desc { font-size: .72rem; }

/* ============================================================
   TABS
   ============================================================ */
.lms-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--lms-border);
  margin-bottom: 1rem;
}
.lms-tab {
  padding: .6rem 1rem;
  font-size: .78rem;
  font-weight: 500;
  color: var(--lms-text-muted);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--lms-transition);
}
.lms-tab:hover { color: var(--lms-text); }
.lms-tab.is-active { color: var(--lms-text); border-bottom-color: var(--lms-accent); font-weight: 600; }

/* ============================================================
   SEARCH & FILTERS
   ============================================================ */
.lms-toolbar {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.lms-search {
  position: relative;
  flex: 1;
  min-width: 200px;
}
.lms-search__icon {
  position: absolute;
  left: .65rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: .8rem;
  color: var(--lms-text-muted);
}
.lms-search__input {
  width: 100%;
  padding: .45rem .75rem .45rem 2rem;
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-sm);
  font-size: .78rem;
  background: var(--lms-bg);
  outline: none;
  transition: border-color var(--lms-transition);
}
.lms-search__input:focus { border-color: var(--lms-accent); }

/* ============================================================
   PAGINATION
   ============================================================ */
.lms-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .3rem;
  padding: 1rem 0;
}
.lms-pagination__btn {
  width: 32px; height: 32px;
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-sm);
  background: var(--lms-bg);
  font-size: .72rem;
  font-weight: 500;
  color: var(--lms-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--lms-transition);
}
.lms-pagination__btn:hover { border-color: var(--lms-accent); color: var(--lms-text); }
.lms-pagination__btn.is-active { background: var(--lms-accent); color: #fff; border-color: var(--lms-accent); }

/* ============================================================
   SIDEBAR TOGGLE (MOBILE)
   ============================================================ */
.lms-sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  z-index: 200;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--lms-accent);
  color: #fff;
  border: none;
  font-size: 1.1rem;
  box-shadow: var(--lms-shadow-lg);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* ============================================================
   MOBILE OVERLAY
   ============================================================ */
.lms-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.3);
  z-index: 99;
}

/* ============================================================
   SETTINGS
   ============================================================ */
.lms-settings-card {
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.lms-settings-card__title {
  font-size: .85rem;
  font-weight: 700;
  margin-bottom: .75rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.lms-settings-card__title i { color: var(--lms-text-muted); }
.lms-toggle-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 0;
}
.lms-toggle-wrap + .lms-toggle-wrap { border-top: 1px solid var(--lms-border); }
.lms-toggle-info__title { font-size: .78rem; font-weight: 600; }
.lms-toggle-info__desc { font-size: .68rem; color: var(--lms-text-muted); }
.lms-toggle {
  position: relative;
  width: 36px; height: 20px;
  background: var(--lms-border);
  border-radius: 99px;
  border: none;
  cursor: pointer;
  transition: background .2s ease;
  flex-shrink: 0;
}
.lms-toggle::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform .2s ease;
}
.lms-toggle.is-on { background: var(--lms-success); }
.lms-toggle.is-on::after { transform: translateX(16px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .lms-stats { grid-template-columns: repeat(2, 1fr); }
  .lms-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .lms-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .lms-grid--sidebar { grid-template-columns: 1fr; }
  .lms-builder { grid-template-columns: 1fr; }
  .lms-player { grid-template-columns: 1fr; }
  .lms-player__sidebar-panel { max-height: 420px; border-left: none; border-top: 1px solid var(--lms-border); }
}

@media (max-width: 768px) {
  .lms-sidebar { transform: translateX(-100%); }
  .lms-sidebar.is-open { transform: translateX(0); }
  .lms-sidebar-overlay.is-open { display: block; }
  .lms-main { margin-left: 0; }
  .lms-sidebar-toggle { display: flex; }
  .lms-stats { grid-template-columns: 1fr 1fr; }
  .lms-grid--2, .lms-grid--3, .lms-grid--4 { grid-template-columns: 1fr; }
  .lms-content { padding: 1rem; }
  .lms-topbar { padding: 0 1rem; }
  .lms-toolbar { flex-direction: column; align-items: stretch; }
  .lms-course-card__thumb { height: 120px; }
}

@media (max-width: 480px) {
  .lms-stats { grid-template-columns: 1fr; }
  .lms-topbar__breadcrumb { display: none; }
}

/* ============================================================
   CHAT MODULE
   ============================================================ */
.lms-chat {
  display: flex;
  height: 100%;
  background: var(--lms-bg);
}

/* ── Sidebar ── */
.lms-chat__sidebar {
  width: 320px;
  min-width: 320px;
  border-right: 1px solid var(--lms-border);
  display: flex;
  flex-direction: column;
  background: var(--lms-surface);
}
.lms-chat__sidebar-header {
  padding: .75rem;
  border-bottom: 1px solid var(--lms-border);
}
.lms-chat__search {
  position: relative;
  display: flex;
  align-items: center;
}
.lms-chat__search i {
  position: absolute;
  left: .6rem;
  font-size: .72rem;
  color: var(--lms-text-muted);
  pointer-events: none;
}
.lms-chat__search input {
  width: 100%;
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius);
  padding: .4rem .5rem .4rem 1.8rem;
  font-size: .72rem;
  font-family: var(--lms-font);
  background: var(--lms-bg);
  color: var(--lms-text);
  outline: none;
  transition: border-color var(--lms-transition);
}
.lms-chat__search input:focus { border-color: var(--lms-accent); }

/* ── Contact list ── */
.lms-chat__contact-list {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
}
.lms-chat__contact {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .6rem .75rem;
  cursor: pointer;
  border-bottom: 1px solid var(--lms-border);
  transition: background var(--lms-transition);
}
.lms-chat__contact:hover { background: var(--lms-surface-hover); }
.lms-chat__contact.is-active {
  background: var(--lms-accent-light);
  border-left: 3px solid var(--lms-accent);
}
.lms-chat__contact-avatar {
  position: relative;
  flex-shrink: 0;
}
.lms-chat__status-dot {
  position: absolute;
  bottom: 0; right: 0;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--lms-border);
  border: 2px solid var(--lms-surface);
}
.lms-chat__status-dot.is-online { background: var(--lms-success); }
.lms-chat__contact-info { flex: 1; min-width: 0; }
.lms-chat__contact-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .25rem;
}
.lms-chat__contact-name {
  font-weight: 600;
  font-size: .76rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lms-chat__contact-time {
  font-size: .58rem;
  color: var(--lms-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.lms-chat__contact-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .25rem;
  margin-top: .15rem;
}
.lms-chat__contact-preview {
  font-size: .65rem;
  color: var(--lms-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}
.lms-chat__unread {
  background: var(--lms-accent);
  color: #fff;
  font-size: .55rem;
  font-weight: 700;
  min-width: 18px;
  height: 18px;
  border-radius: 99px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ── Main chat area ── */
.lms-chat__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--lms-bg);
}
.lms-chat__empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ── Chat header ── */
.lms-chat__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .75rem;
  border-bottom: 1px solid var(--lms-border);
  background: var(--lms-surface);
}
.lms-chat__header-left {
  display: flex;
  align-items: center;
  gap: .6rem;
}
.lms-chat__header-avatar {
  position: relative;
  flex-shrink: 0;
}
.lms-chat__header-actions {
  display: flex;
  gap: .15rem;
}
.lms-chat__back-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  color: var(--lms-text);
  padding: .15rem;
}

/* ── Messages area ── */
.lms-chat__messages {
  flex: 1;
  overflow-y: auto;
  padding: .75rem;
  scrollbar-width: thin;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 20px,
    rgba(0,0,0,.008) 20px,
    rgba(0,0,0,.008) 40px
  );
}
.lms-chat__date-sep {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: .75rem 0;
}
.lms-chat__date-sep span {
  background: var(--lms-surface);
  padding: .2rem .75rem;
  border-radius: var(--lms-radius);
  font-size: .6rem;
  font-weight: 600;
  color: var(--lms-text-muted);
  border: 1px solid var(--lms-border);
  box-shadow: var(--lms-shadow-sm);
}

/* ── Bubbles ── */
.lms-chat__bubble-wrap {
  display: flex;
  align-items: flex-end;
  gap: .35rem;
  margin-bottom: .5rem;
  max-width: 75%;
}
.lms-chat__bubble-wrap.is-me {
  margin-left: auto;
  flex-direction: row-reverse;
}
.lms-chat__bubble {
  padding: .45rem .65rem;
  border-radius: .65rem .65rem .65rem .15rem;
  background: var(--lms-surface);
  border: 1px solid var(--lms-border);
  box-shadow: var(--lms-shadow-sm);
  position: relative;
}
.lms-chat__bubble.is-me {
  background: var(--lms-accent);
  color: #fff;
  border-color: var(--lms-accent);
  border-radius: .65rem .65rem .15rem .65rem;
}
.lms-chat__bubble-sender {
  margin-bottom: .15rem;
  display: flex;
  align-items: center;
  gap: .3rem;
}
.lms-chat__bubble.is-me .lms-chat__bubble-sender span { color: rgba(255,255,255,.85) !important; }
.lms-chat__bubble.is-me .lms-badge { background: rgba(255,255,255,.2) !important; color: #fff !important; }
.lms-chat__bubble-text {
  font-size: .76rem;
  line-height: 1.45;
  word-break: break-word;
}
.lms-chat__bubble-meta {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .15rem;
  margin-top: .2rem;
  font-size: .55rem;
  color: var(--lms-text-muted);
}
.lms-chat__bubble.is-me .lms-chat__bubble-meta { color: rgba(255,255,255,.65); }

/* ── Footer / input ── */
.lms-chat__footer {
  border-top: 1px solid var(--lms-border);
  background: var(--lms-surface);
  padding: .1rem .5rem .5rem;
}
.lms-chat__input-wrap {
  display: flex;
  align-items: center;
  gap: .35rem;
  background: var(--lms-bg);
  border: 1px solid var(--lms-border);
  border-radius: var(--lms-radius-lg);
  padding: .3rem .5rem;
  transition: border-color var(--lms-transition);
}
.lms-chat__input-wrap:focus-within { border-color: var(--lms-accent); box-shadow: 0 0 0 3px var(--lms-accent-light); }
.lms-chat__input {
  flex: 1;
  border: none;
  outline: none;
  background: none;
  font-size: .78rem;
  font-family: var(--lms-font);
  color: var(--lms-text);
  padding: .25rem 0;
}
.lms-chat__input::placeholder { color: var(--lms-text-muted); }
.lms-chat__attach-btn,
.lms-chat__emoji-btn {
  background: none; border: none; cursor: pointer;
  color: var(--lms-text-muted);
  font-size: .9rem;
  padding: .2rem;
  display: flex;
  align-items: center;
  transition: color var(--lms-transition);
}
.lms-chat__attach-btn:hover,
.lms-chat__emoji-btn:hover { color: var(--lms-accent); }
.lms-chat__send-btn {
  background: var(--lms-accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: .78rem;
  transition: background var(--lms-transition), transform .15s;
  flex-shrink: 0;
}
.lms-chat__send-btn:hover { background: #4766d9; transform: scale(1.05); }
.lms-chat__send-btn:active { transform: scale(.95); }

/* ── Typing indicator ── */
.lms-chat__typing {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .2rem .1rem;
  font-size: .62rem;
  color: var(--lms-text-muted);
  font-style: italic;
}
.lms-chat__typing-dots {
  display: flex;
  gap: 3px;
  align-items: center;
}
.lms-chat__typing-dots span {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--lms-text-muted);
  animation: lmsTypingBounce .9s infinite;
}
.lms-chat__typing-dots span:nth-child(2) { animation-delay: .15s; }
.lms-chat__typing-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes lmsTypingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: .4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .lms-chat__sidebar { width: 100%; min-width: 100%; }
  .lms-chat__main { display: none; }
  .lms-chat__main.show-mobile { display: flex; position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 10; }
  .lms-chat__sidebar.hide-mobile { display: none; }
  .lms-chat__back-btn { display: flex; }
}

/* ============================================
   CONTENT PROTECTION — Disable Text Selection
   ============================================ */
*,
*::before,
*::after {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input,
textarea,
[contenteditable="true"],
pre,
code {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}