/* ============================================================
   RosBotz LMS — Premium Theme v3.0
   Modern glassmorphism · Vibrant accents · Micro-animations
   ============================================================ */

/* ─── Design Tokens ─────────────────────────────────────── */
:root {
  /* Brand palette */
  --clr-primary: #6366f1;
  /* Indigo */
  --clr-primary-dark: #4f46e5;
  --clr-primary-glow: rgba(99, 102, 241, 0.25);
  --clr-accent: #06b6d4;
  /* Cyan */
  --clr-accent-glow: rgba(6, 182, 212, 0.2);
  --clr-success: #10b981;
  --clr-warning: #f59e0b;
  --clr-danger: #ef4444;

  /* Sidebar */

  --sidebar-bg: #142449;
  --sidebar-surface: #1e293b;
  --sidebar-border: rgba(255, 255, 255, 0.06);
  --sidebar-text: rgba(255, 255, 255, 0.55);
  --sidebar-active: var(--clr-primary);

  /* Content area */
  --bg-base: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-hover: rgba(255, 255, 255, 0.9);
  --border-card: rgba(255, 255, 255, 0.55);
  --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(15, 23, 42, 0.12);

  /* Text */
  --text-heading: #0f172a;
  --text-body: #475569;
  --text-muted: #94a3b8;

  /* Radius */
  --r-sm: 0.75rem;
  --r-md: 1.25rem;
  --r-lg: 1.75rem;
  --r-xl: 2.5rem;

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.45);
  --glass-blur: blur(16px);

  /* Transitions */
  --tr-fast: 0.15s ease;
  --tr-med: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --tr-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset / Base ───────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ─── Animated Background ────────────────────────────────── */
.lms-global-bg {
  position: fixed;
  inset: 0;
  z-index: -10;
  overflow: hidden;
  pointer-events: none;
  background: linear-gradient(135deg, #eef2ff 0%, #e0f2fe 40%, #f0fdf4 100%);
}

.lms-global-bg::before {
  content: '';
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  top: -200px;
  left: -150px;
  animation: floatBlob1 18s ease-in-out infinite;
}

.lms-global-bg::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
  bottom: -100px;
  right: -100px;
  animation: floatBlob2 14s ease-in-out infinite;
}

.lms-bg-layer {
  position: absolute;
  border-radius: 50%;
  background: transparent;
  border: none;
}

.lms-bg-layer-1 {
  width: 400px;
  height: 400px;
  top: 40%;
  left: 55%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.07) 0%, transparent 70%);
  animation: floatBlob3 20s ease-in-out infinite;
}

.lms-bg-layer-2 {
  width: 300px;
  height: 300px;
  top: 10%;
  right: 20%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.07) 0%, transparent 70%);
  animation: floatBlob4 16s ease-in-out infinite;
}

@keyframes floatBlob1 {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(60px, 40px) scale(1.1);
  }

  66% {
    transform: translate(-30px, 70px) scale(0.9);
  }
}

@keyframes floatBlob2 {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(-50px, -40px) scale(1.15);
  }
}

@keyframes floatBlob3 {

  0%,
  100% {
    transform: translate(0, 0);
  }

  50% {
    transform: translate(-40px, 30px);
  }
}

@keyframes floatBlob4 {

  0%,
  100% {
    transform: translate(0, 0);
  }

  50% {
    transform: translate(30px, -20px);
  }
}

/* ─── Glassmorphism Containers ───────────────────────────── */
.glass-container {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  border-radius: var(--r-xl);
  transition: all var(--tr-med);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.4) 0%, transparent 60%);
  pointer-events: none;
  border-radius: inherit;
}

.glass-card:hover {
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
  border-color: rgba(99, 102, 241, 0.2);
}

/* ─── Stat Cards ─────────────────────────────────────────── */
.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  border-radius: var(--r-xl);
  padding: 1.5rem;
  transition: all var(--tr-med);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--clr-primary-glow);
  transform: translate(30px, -30px);
  transition: all var(--tr-med);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}

.stat-card:hover::after {
  transform: translate(20px, -20px) scale(1.3);
}

.stat-card.accent-cyan::after {
  background: var(--clr-accent-glow);
}

.stat-card.accent-green::after {
  background: rgba(16, 185, 129, 0.18);
}

.stat-card.accent-amber::after {
  background: rgba(245, 158, 11, 0.18);
}

/* ─── Sidebar ────────────────────────────────────────────── */
.lms-sidebar {
  width: 16rem;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.lms-sidebar::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  top: -100px;
  left: -100px;
  pointer-events: none;
}

.sidebar-logo-area {
  padding: 1.5rem 1.25rem 1rem;
  border-bottom: 1px solid var(--sidebar-border);
  flex-shrink: 0;
}

.sidebar-logo-wrap {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--r-md);
  padding: 0.5rem 0.75rem;
  backdrop-filter: blur(8px);
  transition: all var(--tr-fast);
}

.sidebar-logo-wrap:hover {
  background: rgba(255, 255, 255, 0.14);
}

.sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0.75rem 1.5rem;
}

.sidebar-section-label {
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.25);
  padding: 0 0.75rem;
  margin: 1.25rem 0 0.4rem;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--r-sm);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sidebar-text);
  transition: all var(--tr-fast);
  position: relative;
  margin-bottom: 2px;
}

.sidebar-link svg {
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity var(--tr-fast);
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}

.sidebar-link:hover svg {
  opacity: 1;
}

.sidebar-link.active {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.sidebar-link.active svg {
  opacity: 1;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 0 2px 2px 0;
}

.sidebar-footer {
  padding: 0.75rem;
  border-top: 1px solid var(--sidebar-border);
  background: rgba(0, 0, 0, 0.2);
}

.sidebar-logout {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--r-sm);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f87171;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.15);
  transition: all var(--tr-med);
}

.sidebar-logout:hover {
  background: #ef4444;
  color: #fff;
  box-shadow: 0 4px 15px rgba(239, 68, 68, 0.35);
}

/* ─── Page Header ────────────────────────────────────────── */
.page-header {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  height: 4.5rem;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6), 0 4px 20px rgba(15, 23, 42, 0.04);
}

.page-header-title {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text-heading);
  letter-spacing: -0.02em;
}

.page-header-sub {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-top: 0.1rem;
}

/* ─── Pill Badge ─────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

.badge-primary {
  background: rgba(99, 102, 241, 0.12);
  color: var(--clr-primary);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.1);
  color: var(--clr-accent);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.badge-green {
  background: rgba(16, 185, 129, 0.1);
  color: var(--clr-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.1);
  color: var(--clr-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-red {
  background: rgba(239, 68, 68, 0.1);
  color: var(--clr-danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: var(--r-md);
  padding: 0.65rem 1.25rem;
  transition: all var(--tr-med);
  cursor: pointer;
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--tr-fast);
}

.btn:hover::after {
  background: rgba(255, 255, 255, 0.12);
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
  color: #fff;
  box-shadow: 0 4px 15px var(--clr-primary-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px var(--clr-primary-glow);
}

.btn-dark {
  background: var(--text-heading);
  color: #fff;
  box-shadow: 0 4px 15px rgba(15, 23, 42, 0.2);
}

.btn-dark:hover {
  background: var(--clr-primary);
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.05);
  color: var(--text-heading);
  border: 1px solid rgba(15, 23, 42, 0.1);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.1);
}

.btn-outline-primary {
  background: transparent;
  color: var(--clr-primary);
  border: 1.5px solid var(--clr-primary);
}

.btn-outline-primary:hover {
  background: var(--clr-primary);
  color: #fff;
}

/* ─── Progress Bar ───────────────────────────────────────── */
.progress-track {
  background: rgba(15, 23, 42, 0.07);
  border-radius: 999px;
  height: 6px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  transition: width var(--tr-slow);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* ─── Course Card ────────────────────────────────────────── */
.course-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-card);
  border-radius: var(--r-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--tr-med);
  box-shadow: var(--shadow-card);
  position: relative;
}

.course-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--tr-med);
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
}

.course-card:hover::before {
  opacity: 1;
}

.course-card-thumb {
  position: relative;
  height: 10rem;
  overflow: hidden;
}

.course-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--tr-slow);
}

.course-card:hover .course-card-thumb img {
  transform: scale(1.07);
}

.course-card-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(15, 23, 42, 0.5) 100%);
}

.course-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ─── Enroll Alert Toast ─────────────────────────────────── */
.lms-toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-radius: var(--r-lg);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.5rem;
  animation: slideDown 0.4s ease;
  backdrop-filter: blur(8px);
  font-size: 0.8rem;
  font-weight: 700;
}

.lms-toast-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1.5px solid rgba(16, 185, 129, 0.25);
  color: #065f46;
}

.lms-toast-info {
  background: rgba(6, 182, 212, 0.08);
  border: 1.5px solid rgba(6, 182, 212, 0.2);
  color: #0e7490;
}

.lms-toast-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1.5px solid rgba(245, 158, 11, 0.25);
  color: #92400e;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Section Headings ───────────────────────────────────── */
.section-title {
  font-size: 0.7rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-heading);
}

.section-link {
  font-size: 0.6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-primary);
  transition: color var(--tr-fast);
}

.section-link:hover {
  color: var(--clr-primary-dark);
}

/* ─── Scrollbar ──────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.2);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(99, 102, 241, 0.4);
}

.custom-scrollbar::-webkit-scrollbar {
  width: 3px;
}

.custom-scrollbar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.04);
}

.custom-scrollbar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ─── Utility Radius ─────────────────────────────────────── */
.rounded-3xl-plus {
  border-radius: 2.5rem;
}

.rounded-4xl {
  border-radius: 3rem;
}

.rounded-5xl {
  border-radius: 4rem;
}

/* ─── line-clamp ─────────────────────────────────────────── */
.line-clamp-1 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Avatar Ring ────────────────────────────────────────── */
.avatar-ring {
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
  transition: box-shadow var(--tr-fast);
}

.avatar-ring:hover {
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.4);
}

/* ─── Icon Box ───────────────────────────────────────────── */
.icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  flex-shrink: 0;
}

.icon-box-sm {
  width: 2rem;
  height: 2rem;
}

.icon-box-md {
  width: 2.75rem;
  height: 2.75rem;
}

.icon-box-lg {
  width: 3.5rem;
  height: 3.5rem;
}

.icon-box-primary {
  background: rgba(99, 102, 241, 0.12);
  color: var(--clr-primary);
}

.icon-box-cyan {
  background: rgba(6, 182, 212, 0.12);
  color: var(--clr-accent);
}

.icon-box-green {
  background: rgba(16, 185, 129, 0.12);
  color: var(--clr-success);
}

.icon-box-amber {
  background: rgba(245, 158, 11, 0.12);
  color: var(--clr-warning);
}

.icon-box-red {
  background: rgba(239, 68, 68, 0.12);
  color: var(--clr-danger);
}

/* ─── Dark "next-session" card ───────────────────────────── */
.card-dark {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--r-xl);
  padding: 1.5rem;
  color: #fff;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.3);
  transition: all var(--tr-med);
  position: relative;
  overflow: hidden;
}

.card-dark::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
  top: -60px;
  right: -40px;
  pointer-events: none;
}

.card-dark:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 45px rgba(15, 23, 42, 0.4);
}

/* ─── Recommended tag ────────────────────────────────────── */
.tag-recommended {
  position: absolute;
  top: 0;
  right: 0;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  color: #fff;
  font-size: 0.55rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: 0 var(--r-xl) 0 var(--r-md);
}

/* ─── Material list item ─────────────────────────────────── */
.material-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.65rem 0.75rem;
  border-radius: var(--r-sm);
  transition: background var(--tr-fast);
  border-left: 3px solid transparent;
}

.material-item:hover {
  background: rgba(99, 102, 241, 0.05);
}

.material-item.type-pdf {
  border-left-color: #ef4444;
}

.material-item.type-video {
  border-left-color: #6366f1;
}

.material-item.type-other {
  border-left-color: #10b981;
}

/* ─── Empty state ────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 2rem;
  text-align: center;
}

.empty-state-icon {
  width: 3.5rem;
  height: 3.5rem;
  background: rgba(99, 102, 241, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(99, 102, 241, 0.4);
}