/* ===================================================
   BIBLIOTECA OCULTA  MEMBER AREA v2
   Design: Premium Dark + Glassmorphism
   =================================================== */

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

:root {
  /* Core palette */
  --bg:          #060608;
  --bg2:         #0c0c10;
  --surface:     #111116;
  --surface2:    #16161c;
  --surface3:    #1c1c24;
  --border:      rgba(255,255,255,.07);
  --border2:     rgba(255,255,255,.12);

  /* Gold accent */
  --gold:        #d4a853;
  --gold2:       #f0c878;
  --gold3:       #b8892e;
  --gold-glow:   rgba(212,168,83,.3);
  --gold-dim:    rgba(212,168,83,.1);

  /* Text */
  --text:        #f0f0f4;
  --text2:       #9090a0;
  --muted:       #55556a;
  --muted2:      #333344;

  /* Status */
  --danger:      #e05555;
  --success:     #4caf7d;
  --info:        #5b8def;

  /* Geometry */
  --radius-sm:   8px;
  --radius:      12px;
  --radius-lg:   18px;
  --radius-xl:   24px;

  /* Layout */
  --header-h:    64px;
  --sidebar-w:   300px;

  /* Type */
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---- SCROLLBAR ---- */
html { scroll-behavior: smooth; }
::-webkit-scrollbar { width: 3px; height: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.1); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.2); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===================================================
   LOADING
   =================================================== */
#loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  flex-direction: column;
  gap: 20px;
}
.spinner {
  width: 32px; height: 32px;
  border: 2px solid rgba(212,168,83,.15);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-brand {
  font-size: .75rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: pulse 2s ease infinite;
}
@keyframes pulse { 0%,100% { opacity:.4; } 50% { opacity:.9; } }

/* ===================================================
   AUTH SCREENS
   =================================================== */
#auth-screen, #setpw-screen {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 100% 60% at 50% -10%, rgba(212,168,83,.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 110%, rgba(212,168,83,.06) 0%, transparent 55%),
    var(--bg);
}
#auth-screen::before, #setpw-screen::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,168,83,.04) 0%, transparent 70%);
  top: -200px; left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}

.auth-box {
  position: relative;
  background: rgba(17,17,22,.8);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--radius-xl);
  padding: 52px 48px;
  width: 100%;
  max-width: 420px;
  box-shadow:
    0 0 0 1px rgba(212,168,83,.05),
    0 40px 100px rgba(0,0,0,.8),
    inset 0 1px 0 rgba(255,255,255,.06);
  animation: authIn .5s cubic-bezier(.16,1,.3,1) both;
}
@keyframes authIn {
  from { opacity: 0; transform: translateY(24px) scale(.97); }
  to   { opacity: 1; transform: none; }
}

.auth-logo {
  text-align: center;
  margin-bottom: 40px;
}
.auth-logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(212,168,83,.2), rgba(212,168,83,.05));
  border: 1px solid rgba(212,168,83,.3);
  font-size: 1.8rem;
  margin-bottom: 16px;
  box-shadow: 0 0 30px rgba(212,168,83,.15), inset 0 1px 0 rgba(255,255,255,.1);
}
.auth-logo-name {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: -.2px;
}
.auth-logo-sub {
  display: block;
  font-size: .77rem;
  color: var(--muted);
  margin-top: 6px;
  letter-spacing: .4px;
}

.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: .68rem;
  color: var(--text2);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}
.form-group input {
  width: 100%;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  color: var(--text);
  padding: 13px 16px;
  border-radius: var(--radius);
  font-size: .93rem;
  font-family: var(--font);
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.form-group input:focus {
  outline: none;
  border-color: rgba(212,168,83,.5);
  box-shadow: 0 0 0 3px rgba(212,168,83,.08);
  background: rgba(255,255,255,.06);
}
.form-group input::placeholder { color: var(--muted); }

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  color: #0a0500;
  border: none;
  padding: 15px;
  border-radius: var(--radius);
  font-size: .92rem;
  font-weight: 800;
  cursor: pointer;
  font-family: var(--font);
  transition: filter .2s, transform .15s, box-shadow .2s;
  margin-top: 8px;
  letter-spacing: .3px;
  box-shadow: 0 4px 20px rgba(212,168,83,.25);
}
.btn-primary:hover {
  filter: brightness(1.12);
  box-shadow: 0 6px 28px rgba(212,168,83,.4);
}
.btn-primary:active { transform: scale(.98); }
.btn-primary:disabled { opacity: .35; cursor: default; filter: none; box-shadow: none; }

.auth-error {
  background: rgba(224,85,85,.08);
  border: 1px solid rgba(224,85,85,.2);
  color: #f08888;
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: .83rem;
  margin-bottom: 16px;
  display: none;
  line-height: 1.55;
}
.forgot-link {
  display: block;
  text-align: center;
  margin-top: 20px;
  font-size: .78rem;
  color: var(--muted);
  cursor: pointer;
  transition: color .2s;
}
.forgot-link:hover { color: var(--gold); }

/* ===================================================
   NAVBAR
   =================================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  z-index: 100;
  transition: background .3s, box-shadow .3s;
}
.navbar.scrolled {
  background: rgba(6,6,8,.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 1px 40px rgba(0,0,0,.6);
}
.navbar-left { display: flex; align-items: center; gap: 14px; }
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .92rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: .3px;
  user-select: none;
}
.navbar-logo-icon {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, rgba(212,168,83,.2), rgba(212,168,83,.06));
  border: 1px solid rgba(212,168,83,.25);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
}
.navbar-logo span { color: rgba(255,255,255,.28); font-weight: 400; }

.navbar-actions { display: flex; align-items: center; gap: 8px; }

.nav-avatar-wrap {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer;
  padding: 5px 12px 5px 5px;
  border-radius: 99px;
  border: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.03);
  transition: all .2s;
}
.nav-avatar-wrap:hover {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.14);
}
.nav-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  display: flex; align-items: center; justify-content: center;
  font-size: .62rem; font-weight: 900;
  color: #0a0500;
  flex-shrink: 0; letter-spacing: .5px;
}
.nav-avatar-name {
  font-size: .75rem; font-weight: 600;
  color: var(--text2);
  max-width: 100px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.nav-btn {
  background: transparent;
  border: 1px solid rgba(255,255,255,.08);
  color: var(--muted);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .77rem;
  font-family: var(--font);
  transition: all .2s;
  font-weight: 500;
}
.nav-btn:hover {
  border-color: rgba(255,255,255,.18);
  color: var(--text);
  background: rgba(255,255,255,.04);
}
.nav-btn.danger { border-color: rgba(224,85,85,.12); color: rgba(224,85,85,.45); }
.nav-btn.danger:hover {
  border-color: rgba(224,85,85,.4);
  color: var(--danger);
  background: rgba(224,85,85,.05);
}

/* ===================================================
   DASHBOARD
   =================================================== */
#dashboard-screen {
  display: none;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* Hero */
.dash-hero {
  position: relative;
  padding: 64px 44px 56px;
  overflow: hidden;
}
.dash-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 200% at 0% 60%,  rgba(212,168,83,.09) 0%, transparent 55%),
    radial-gradient(ellipse 40% 120% at 100% 90%, rgba(212,168,83,.05) 0%, transparent 50%);
  pointer-events: none;
}
.dash-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,.4) 30%, rgba(0,0,0,.4) 70%, transparent);
  pointer-events: none;
}
.dash-hero-line {
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(212,168,83,.25) 40%, rgba(212,168,83,.25) 60%, transparent 100%);
}
.dash-hero-inner { position: relative; z-index: 1; }

.dash-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.dash-hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold);
  animation: glow 2.5s ease infinite;
}
@keyframes glow {
  0%,100% { box-shadow: 0 0 8px var(--gold); }
  50%      { box-shadow: 0 0 16px var(--gold), 0 0 30px rgba(212,168,83,.4); }
}
.dash-hero-eyebrow-text {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--gold);
  opacity: .8;
}

.dash-hero-greeting {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  letter-spacing: -.8px;
  margin-bottom: 12px;
}
.dash-hero-greeting em {
  font-style: normal;
  background: linear-gradient(135deg, var(--gold2), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dash-hero-sub {
  font-size: .92rem;
  color: var(--text2);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 32px;
}

.dash-hero-stats { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dash-stat-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 99px;
  padding: 7px 16px;
  font-size: .78rem;
  color: var(--text2);
  font-weight: 500;
  backdrop-filter: blur(8px);
}
.dash-stat-pill strong { color: #fff; font-weight: 800; }
.dash-stat-pill .pill-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px rgba(212,168,83,.8);
}

/* Section */
.dash-section { padding: 40px 44px 60px; }
.dash-section-header {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 28px; gap: 12px;
}
.dash-section-title-group { display: flex; align-items: center; gap: 10px; }
.dash-section-title {
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
  font-weight: 700;
}
.dash-section-count {
  font-size: .63rem;
  font-weight: 800;
  background: var(--gold-dim);
  color: var(--gold);
  border: 1px solid rgba(212,168,83,.2);
  border-radius: 99px;
  padding: 2px 10px;
}

/* Product cards */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  overflow: hidden;
  transition: transform .3s cubic-bezier(.2,0,.2,1), border-color .3s, box-shadow .3s;
  animation: cardIn .4s cubic-bezier(.2,0,.2,1) both;
  position: relative;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}

/* Glowing top edge by type */
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  opacity: 0;
  transition: opacity .3s;
}
.product-card.type-course::before  { background: linear-gradient(90deg, transparent, var(--gold), transparent); }
.product-card.type-ebook::before   { background: linear-gradient(90deg, transparent, #3dd6c8, transparent); }
.product-card.type-bundle::before  { background: linear-gradient(90deg, transparent, #a78bfa, transparent); }
.product-card.type-default::before { background: linear-gradient(90deg, transparent, var(--gold), transparent); }

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,255,255,.12);
  box-shadow: 0 24px 60px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.07);
}
.product-card:hover::before { opacity: 1; }

/* Card banner / visual area */
.product-card-visual {
  height: 160px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-card-visual.type-course  { background: linear-gradient(155deg, #0e0a00, #221900, #140f00); }
.product-card-visual.type-ebook   { background: linear-gradient(155deg, #051414, #0c1e1e, #051414); }
.product-card-visual.type-bundle  { background: linear-gradient(155deg, #0d0814, #1a0f26, #0d0814); }
.product-card-visual.type-default { background: linear-gradient(155deg, #0e0e0e, #181818, #0e0e0e); }

/* Noise texture overlay */
.product-card-visual::after {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.04'/%3E%3C/svg%3E");
  background-size: 200px;
  opacity: .5;
  pointer-events: none;
}
.product-card-visual-glow {
  position: absolute;
  width: 100px; height: 100px;
  border-radius: 50%;
  filter: blur(40px);
  opacity: .4;
  transition: opacity .3s;
}
.type-course  .product-card-visual-glow { background: var(--gold); top: 30%; left: 40%; }
.type-ebook   .product-card-visual-glow { background: #3dd6c8;    top: 30%; left: 40%; }
.type-bundle  .product-card-visual-glow { background: #a78bfa;    top: 30%; left: 40%; }
.type-default .product-card-visual-glow { background: var(--gold); top: 30%; left: 40%; }
.product-card:hover .product-card-visual-glow { opacity: .65; }

.product-card-icon {
  font-size: 3.2rem;
  position: relative; z-index: 1;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,.8));
  transition: transform .3s cubic-bezier(.2,0,.2,1);
}
.product-card:hover .product-card-icon {
  transform: scale(1.12) translateY(-4px);
}
.product-card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: absolute;
  inset: 0;
  transition: transform .4s cubic-bezier(.2,0,.2,1);
}
.product-card:hover .product-card-thumb {
  transform: scale(1.05);
}

/* Card body */
.product-card-body { padding: 20px 22px 22px; }
.product-card-meta {
  display: flex; align-items: center;
  gap: 8px; margin-bottom: 14px;
}
.product-badge {
  font-size: .6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  border-radius: 6px;
  padding: 3px 9px;
}
.product-badge.type-course  { background: rgba(212,168,83,.1);  color: var(--gold);  border: 1px solid rgba(212,168,83,.22); }
.product-badge.type-ebook   { background: rgba(61,214,200,.08); color: #3dd6c8;      border: 1px solid rgba(61,214,200,.22); }
.product-badge.type-bundle  { background: rgba(167,139,250,.08);color: #a78bfa;      border: 1px solid rgba(167,139,250,.22); }
.product-badge.type-default { background: rgba(212,168,83,.1);  color: var(--gold);  border: 1px solid rgba(212,168,83,.22); }

.product-card-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  letter-spacing: -.15px;
  margin-bottom: 8px;
}
.product-card-desc {
  font-size: .8rem;
  color: var(--text2);
  line-height: 1.65;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card-foot {
  display: flex; align-items: center;
  justify-content: space-between; gap: 10px;
}
.product-card-cta {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  color: #0a0500;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-weight: 900;
  letter-spacing: .3px;
  transition: filter .2s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(212,168,83,.2);
}
.product-card:hover .product-card-cta {
  filter: brightness(1.1);
  box-shadow: 0 6px 24px rgba(212,168,83,.38);
}
.product-card-cta-arrow { transition: transform .25s; }
.product-card:hover .product-card-cta-arrow { transform: translateX(4px); }

/* Card progress & last lesson */
.card-progress-row {
  display: flex; align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}
.card-progress-label { font-size: .68rem; color: var(--muted); }
.card-progress-pct   { font-size: .68rem; font-weight: 800; color: var(--gold); }
.card-progress-bar {
  height: 3px;
  background: rgba(255,255,255,.07);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 14px;
}
.card-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold3), var(--gold2));
  border-radius: 99px;
  transition: width .6s ease;
}
.card-last-lesson {
  font-size: .72rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 14px;
  opacity: .75;
}
.card-started-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px rgba(212,168,83,.8);
  margin-left: 6px;
  vertical-align: middle;
  animation: glow 2.5s ease infinite;
}

/* Empty state */
.empty-state { text-align: center; padding: 100px 24px; }
.empty-icon { font-size: 3.5rem; margin-bottom: 20px; opacity: .15; }
.empty-state h3 { font-size: 1.1rem; color: var(--muted); font-weight: 600; margin-bottom: 10px; }
.empty-state p { font-size: .85rem; color: var(--muted); line-height: 1.7; }

/* ===================================================
   COURSE SCREEN
   =================================================== */
#course-screen { display: none; }

.course-topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--header-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px;
  background: linear-gradient(to bottom, rgba(0,0,0,.88), transparent);
  z-index: 200;
  transition: background .3s, box-shadow .3s;
}
.course-topbar.ctb-scrolled {
  background: rgba(6,6,8,.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}
.course-topbar-logo {
  font-size: .88rem; font-weight: 900; color: var(--gold);
  white-space: nowrap; flex-shrink: 0; letter-spacing: .2px;
}
.course-topbar-sep { width: 1px; height: 14px; background: rgba(255,255,255,.12); flex-shrink: 0; }
.course-topbar-title {
  font-size: .82rem; font-weight: 600;
  color: rgba(255,255,255,.5);
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.course-topbar-back {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.1);
  color: var(--text2);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: .77rem; font-family: var(--font);
  transition: all .2s;
  white-space: nowrap; flex-shrink: 0; font-weight: 600;
}
.course-topbar-back:hover {
  background: rgba(255,255,255,.14); color: #fff;
  border-color: rgba(255,255,255,.2);
}

.course-layout { display: flex; height: 100vh; padding-top: var(--header-h); }

/* Sidebar */
.course-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: #080809;
  border-right: 1px solid rgba(255,255,255,.05);
  overflow-y: auto;
  display: flex; flex-direction: column;
  transition: width .3s ease, opacity .3s;
}
.course-sidebar.hidden { width: 0; opacity: 0; overflow: hidden; }

.sidebar-toggle-btn {
  position: absolute;
  top: calc(var(--header-h) + 14px);
  left: var(--sidebar-w);
  width: 20px; height: 36px;
  background: #101012;
  border: 1px solid rgba(255,255,255,.09);
  border-left: none;
  border-radius: 0 8px 8px 0;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: .55rem; color: var(--muted);
  transition: left .3s, background .2s, color .2s; z-index: 199;
}
.sidebar-toggle-btn:hover { background: #181820; color: var(--text); }

.sidebar-course-header {
  padding: 22px 18px 18px;
  border-bottom: 1px solid rgba(255,255,255,.05);
  flex-shrink: 0;
  background: linear-gradient(to bottom, rgba(212,168,83,.06), transparent);
}
.sidebar-course-name {
  font-size: .86rem; font-weight: 800; color: #fff;
  line-height: 1.35; margin-bottom: 16px;
}
.sidebar-progress-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.sidebar-progress-label { font-size: .63rem; color: var(--muted); }
.sidebar-progress-pct { font-size: .67rem; font-weight: 800; color: var(--gold); }
.sidebar-progress-bar-wrap {
  height: 3px;
  background: rgba(255,255,255,.07);
  border-radius: 99px; overflow: hidden;
}
.sidebar-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold3), var(--gold2));
  border-radius: 99px;
  transition: width .6s cubic-bezier(.4,0,.2,1);
}

.sidebar-modules { flex: 1; padding: 6px 0 28px; }
.module-group {}
.module-toggle {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px 10px;
  cursor: pointer; user-select: none;
  transition: background .15s;
}
.module-toggle:hover { background: rgba(255,255,255,.025); }
.module-toggle-arrow {
  font-size: .48rem; color: var(--muted2);
  transition: transform .25s cubic-bezier(.4,0,.2,1); flex-shrink: 0;
}
.module-toggle-arrow.open { transform: rotate(90deg); }
.module-toggle-title {
  font-size: .59rem; font-weight: 800;
  text-transform: uppercase; letter-spacing: 1.6px;
  color: #44445a; flex: 1; line-height: 1.4;
}
.module-toggle-count {
  font-size: .61rem; color: var(--muted2);
  background: rgba(255,255,255,.04);
  border-radius: 99px; padding: 1px 8px; flex-shrink: 0;
}
.module-lessons {
  overflow: hidden;
  max-height: 2000px;
  transition: max-height .4s cubic-bezier(.4,0,.2,1);
}
.module-lessons.collapsed { max-height: 0; }

/* Lesson items  episode style */
.lesson-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px 10px 14px;
  cursor: pointer;
  transition: background .18s;
  border-left: 2px solid transparent;
}
.lesson-item:hover { background: rgba(255,255,255,.035); }
.lesson-item.active {
  background: rgba(212,168,83,.06);
  border-left-color: var(--gold);
}

.lesson-num-badge {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 6px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.07);
  display: flex; align-items: center; justify-content: center;
  font-size: .6rem; font-weight: 800;
  color: #44445a;
  font-variant-numeric: tabular-nums;
  transition: background .18s, border-color .18s, color .18s;
}
.lesson-item.active .lesson-num-badge {
  background: rgba(212,168,83,.14);
  border-color: rgba(212,168,83,.3);
  color: var(--gold);
}
.lesson-item:hover:not(.active) .lesson-num-badge {
  background: rgba(255,255,255,.07); color: var(--text2);
}
.lesson-item-body { flex: 1; min-width: 0; }
.lesson-item-title {
  font-size: .78rem; color: #606078;
  line-height: 1.35; transition: color .15s; font-weight: 500;
}
.lesson-item.active .lesson-item-title { color: #fff; font-weight: 700; }
.lesson-item:hover:not(.active) .lesson-item-title { color: var(--text); }
.lesson-item-dur { font-size: .62rem; color: var(--muted2); margin-top: 2px; }
.lesson-done-dot {
  width: 18px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
}
.lesson-done-dot svg { width: 14px; height: 14px; }

/* Course main area */
.course-main { flex: 1; overflow-y: auto; background: #000; }

.player-zone {
  background: #000; width: 100%;
  aspect-ratio: 16/9;
  max-height: calc(100vh - var(--header-h) - 80px);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.player-zone::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 60px;
  background: linear-gradient(to bottom, transparent, #000);
  pointer-events: none; z-index: 1;
}
.player-zone iframe,
.player-zone video { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }
.player-placeholder {
  display: flex; flex-direction: column;
  align-items: center; gap: 12px;
  color: #333340; font-size: .83rem;
}
.ph-icon { font-size: 2.5rem; opacity: .12; }

.lesson-info {
  padding: 32px 40px 70px;
  background: #000;
  animation: fadeSlide .35s cubic-bezier(.16,1,.3,1) both;
}
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

.lesson-info-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 16px;
  margin-bottom: 18px;
}
.lesson-info-title {
  font-size: 1.8rem; font-weight: 900; color: #fff;
  line-height: 1.12; flex: 1; letter-spacing: -.5px;
}
.lesson-index-badge {
  flex-shrink: 0;
  background: rgba(255,255,255,.05);
  border-radius: var(--radius-sm);
  padding: 5px 11px;
  font-size: .67rem; font-weight: 800; color: var(--muted);
  white-space: nowrap; margin-top: 6px;
  font-variant-numeric: tabular-nums; letter-spacing: .5px;
}

.lesson-actions-row {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 20px; flex-wrap: wrap;
}
.btn-ln-next {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  color: #0a0500;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-size: .86rem; font-weight: 900; letter-spacing: .2px;
  cursor: pointer; font-family: var(--font); border: none;
  transition: filter .2s, box-shadow .2s;
  box-shadow: 0 4px 22px rgba(212,168,83,.28);
}
.btn-ln-next:hover:not(:disabled) {
  filter: brightness(1.12);
  box-shadow: 0 6px 32px rgba(212,168,83,.45);
}
.btn-ln-next:disabled { opacity: .2; cursor: default; filter: none; box-shadow: none; }

.btn-ln-prev {
  display: inline-flex; align-items: center; gap: 7px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  color: var(--text2);
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  font-size: .83rem; font-weight: 700;
  cursor: pointer; font-family: var(--font); transition: all .2s;
}
.btn-ln-prev:hover:not(:disabled) {
  background: rgba(255,255,255,.12); color: #fff;
  border-color: rgba(255,255,255,.2);
}
.btn-ln-prev:disabled { opacity: .2; cursor: default; }

.btn-done {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 11px 16px; border-radius: var(--radius-sm);
  font-size: .81rem; font-weight: 700;
  cursor: pointer; font-family: var(--font);
  transition: all .2s; border: 1px solid;
}
.btn-done.undone {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.09); color: var(--muted);
}
.btn-done.undone:hover {
  background: rgba(212,168,83,.08);
  border-color: rgba(212,168,83,.3); color: var(--gold);
}
.btn-done.done {
  background: rgba(76,175,125,.09);
  border-color: rgba(76,175,125,.28); color: var(--success);
}

.lesson-info-meta {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 22px; flex-wrap: wrap;
}
.lesson-meta-pill {
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: .68rem; color: var(--muted); letter-spacing: .2px;
}
.btn-ln-nav { border: none; }

.lesson-divider { height: 1px; background: rgba(255,255,255,.05); margin: 24px 0; }
.lesson-body { font-size: .93rem; line-height: 1.9; color: #7878a0; max-width: 720px; user-select: none; }
.lesson-body h2 { font-size: 1.1rem; font-weight: 700; margin: 24px 0 10px; color: #ddd; }
.lesson-body h3 { font-size: .98rem; font-weight: 700; margin: 18px 0 8px; color: #ccc; }
.lesson-body ul, .lesson-body ol { margin: 10px 0 10px 22px; }
.lesson-body li { margin-bottom: 5px; }
.lesson-body code { background: #131a2a; border-radius: 5px; padding: 2px 7px; font-size: .86em; color: #7eb8ff; font-family: 'Fira Code','Consolas',monospace; }
.lesson-body pre { background: #0c1422; border: 1px solid #1a2640; border-radius: var(--radius); padding: 18px; overflow-x: auto; margin: 16px 0; }
.lesson-body pre code { background: none; padding: 0; color: #93c5fd; }
.lesson-body hr { border: none; border-top: 1px solid rgba(255,255,255,.06); margin: 22px 0; }
.lesson-body a { color: var(--gold); text-underline-offset: 3px; }
.lesson-body a:hover { color: var(--gold2); }
.lesson-body img { max-width: 100%; border-radius: var(--radius); margin: 12px 0; display: block; pointer-events: none; user-select: none; -webkit-user-drag: none; }
.lesson-body p { margin-bottom: 12px; }
.lesson-body blockquote { border-left: 2px solid var(--gold); margin: 16px 0; padding: 10px 18px; background: rgba(212,168,83,.04); border-radius: 0 var(--radius) var(--radius) 0; color: #7070a0; font-style: italic; }
.lesson-body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: .87rem; }
.lesson-body th { background: rgba(255,255,255,.04); color: var(--text); padding: 9px 14px; text-align: left; font-weight: 700; border: 1px solid var(--border); }
.lesson-body td { padding: 8px 14px; border: 1px solid var(--border); color: var(--text2); }
.lesson-body tr:nth-child(even) td { background: rgba(255,255,255,.015); }

.lesson-attachments { margin-top: 28px; }
.lesson-attach-title { font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: var(--muted); margin-bottom: 12px; }
.attach-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.attach-item {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.07);
  color: var(--text); padding: 8px 14px;
  border-radius: var(--radius-sm); font-size: .79rem; font-weight: 600;
  text-decoration: none; transition: background .15s, border-color .15s;
}
.attach-item:hover { background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.16); }

/* Audio */
.audio-wrap {
  background: linear-gradient(to right, #080809, #0e0e12);
  width: 100%; position: absolute; inset: 0;
  display: flex; align-items: center; gap: 24px; padding: 32px 40px;
}
.audio-icon { font-size: 2.8rem; opacity: .25; flex-shrink: 0; }
.audio-wrap audio { flex: 1; height: 44px; border-radius: var(--radius-sm); }

/* External link */
.ext-link-card {
  display: inline-flex; align-items: center; gap: 12px;
  background: rgba(212,168,83,.06);
  border: 1px solid rgba(212,168,83,.2);
  border-radius: var(--radius);
  padding: 16px 22px; margin-bottom: 24px;
  text-decoration: none; color: var(--gold);
  font-size: .92rem; font-weight: 700; transition: all .2s;
}
.ext-link-card:hover { background: rgba(212,168,83,.12); transform: translateY(-1px); }

/* ===================================================
   TOAST
   =================================================== */
#toast-container {
  position: fixed; bottom: 28px; right: 28px;
  z-index: 9999; display: flex; flex-direction: column; gap: 10px;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  background: rgba(20,20,26,.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 13px 18px;
  box-shadow: 0 8px 40px rgba(0,0,0,.7);
  font-size: .82rem; font-weight: 600;
  min-width: 200px;
  animation: toastIn .3s cubic-bezier(.16,1,.3,1) both;
  pointer-events: all; cursor: default;
}
.toast.success { border-color: rgba(76,175,125,.3); }
.toast.neutral { border-color: rgba(255,255,255,.1); }
@keyframes toastIn { from { opacity: 0; transform: translateY(14px) scale(.96); } to { opacity: 1; transform: none; } }
@keyframes toastOut { to { opacity: 0; transform: translateY(6px) scale(.97); } }

/* ===================================================
   SETTINGS
   =================================================== */
#settings-screen { display: none; padding-top: var(--header-h); }
.settings-wrap { max-width: 560px; margin: 0 auto; padding: 56px 24px; }
.settings-title { font-size: 1.5rem; font-weight: 900; margin-bottom: 6px; letter-spacing: -.3px; }
.settings-sub { color: var(--text2); font-size: .88rem; margin-bottom: 36px; line-height: 1.65; }

.settings-card {
  background: var(--surface);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.settings-section { padding: 26px 28px; }
.settings-section + .settings-section { border-top: 1px solid rgba(255,255,255,.05); }
.settings-section-label {
  font-size: .65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--muted); margin-bottom: 18px;
}
.settings-input {
  width: 100%;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  color: var(--text); padding: 12px 14px;
  border-radius: var(--radius); font-size: .88rem; font-family: var(--font);
  margin-bottom: 12px; transition: border-color .2s, box-shadow .2s;
}
.settings-input:focus {
  outline: none;
  border-color: rgba(212,168,83,.4);
  box-shadow: 0 0 0 3px rgba(212,168,83,.07);
}
.settings-input::placeholder { color: var(--muted); }
.settings-label {
  display: block;
  font-size: .67rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--text2); margin-bottom: 7px;
}
.settings-actions {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  padding: 22px 28px; border-top: 1px solid rgba(255,255,255,.05);
}
.btn-save {
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  color: #0a0500; border: none;
  padding: 11px 28px; border-radius: var(--radius);
  font-size: .85rem; font-weight: 800;
  cursor: pointer; font-family: var(--font); transition: filter .2s;
  box-shadow: 0 4px 16px rgba(212,168,83,.2);
}
.btn-save:hover { filter: brightness(1.1); }
.btn-cancel {
  background: none; border: 1px solid rgba(255,255,255,.09);
  color: var(--muted); padding: 10px 22px;
  border-radius: var(--radius); font-size: .85rem;
  cursor: pointer; font-family: var(--font); transition: all .2s;
}
.btn-cancel:hover { border-color: rgba(255,255,255,.2); color: var(--text); }
.settings-profile-row { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.settings-avatar {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold3));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 800; color: #0a0500; flex-shrink: 0;
}

/* ===================================================
   RESPONSIVE — see updated block at end of file
   =================================================== */
@media (min-width: 769px) {
  .course-topbar { padding: 0 28px; }
}

/* ===================================================
   TOP PROGRESS BAR
   =================================================== */
#course-top-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px;
  background: rgba(255,255,255,.05); z-index: 9999; pointer-events: none;
}
#course-top-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold3), var(--gold2), #ffd700);
  transition: width .6s cubic-bezier(.4,0,.2,1);
  width: 0%;
}

/* ===================================================
   TOPBAR BREADCRUMB + TITLE WRAP
   =================================================== */
.ctb-title-wrap { flex: 1; min-width: 0; overflow: hidden; }
.ctb-breadcrumb {
  font-size: .65rem; color: rgba(255,255,255,.3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  margin-top: 1px; letter-spacing: .2px;
}

/* ===================================================
   THEME TOGGLE + MOBILE MENU BUTTON
   =================================================== */
.theme-btn {
  font-size: .9rem; flex-shrink: 0;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.09);
  color: var(--text2);
  padding: 7px 10px; border-radius: var(--radius-sm);
  cursor: pointer; font-family: var(--font);
  transition: all .2s; white-space: nowrap;
}
.theme-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
.mobile-menu-btn { display: none; }

/* ===================================================
   SIDEBAR SEARCH
   =================================================== */
.sidebar-search-wrap { padding: 10px 12px 4px; }
.sidebar-search {
  width: 100%;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 8px 12px;
  font-size: .78rem; font-family: var(--font);
  transition: border-color .2s, background .2s;
  box-sizing: border-box;
}
.sidebar-search:focus {
  outline: none;
  border-color: rgba(212,168,83,.4);
  background: rgba(255,255,255,.07);
}
.sidebar-search::placeholder { color: var(--muted); }

/* ===================================================
   NOTES PER LESSON
   =================================================== */
.notes-section {
  margin-top: 32px;
  border-top: 1px solid rgba(255,255,255,.05);
  padding-top: 24px;
}
.notes-toggle-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  color: var(--text2); padding: 9px 16px;
  border-radius: var(--radius-sm); cursor: pointer;
  font-size: .8rem; font-weight: 700; font-family: var(--font);
  transition: all .2s; margin-bottom: 0;
}
.notes-toggle-btn:hover { background: rgba(255,255,255,.08); color: var(--text); border-color: rgba(255,255,255,.16); }
.notes-has-dot {
  display: inline-block; width: 5px; height: 5px;
  border-radius: 50%; background: var(--gold);
  box-shadow: 0 0 5px rgba(212,168,83,.7);
}
.notes-body {
  display: none; margin-top: 12px;
}
.notes-body.open { display: block; }
.notes-textarea {
  width: 100%; max-width: 720px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.09);
  border-radius: var(--radius);
  color: var(--text); padding: 14px 16px;
  font-size: .88rem; font-family: var(--font);
  line-height: 1.7; resize: vertical; min-height: 110px;
  transition: border-color .2s, background .2s;
  box-sizing: border-box;
}
.notes-textarea:focus {
  outline: none;
  border-color: rgba(212,168,83,.35);
  background: rgba(255,255,255,.06);
}
.notes-hint { font-size: .65rem; color: var(--muted); margin-top: 8px; }

/* ===================================================
   MOBILE SIDEBAR BACKDROP
   =================================================== */
#sidebar-mobile-backdrop {
  display: none;
  position: fixed; inset: 0;
  top: var(--header-h);
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(2px);
  z-index: 299;
}
#sidebar-mobile-backdrop.open { display: block; }

/* ===================================================
   CUSTOM VIDEO PLAYER
   =================================================== */
.cvp {
  position: absolute; inset: 0;
  background: #000;
  cursor: pointer;
  overflow: hidden;
}
.cvp video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: contain;
}
.cvp-controls {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(to top, rgba(0,0,0,.95) 0%, rgba(0,0,0,.6) 55%, transparent 100%);
  padding: 44px 14px 12px;
  z-index: 2;
  opacity: 0;
  transition: opacity .25s;
}
.cvp-controls.visible { opacity: 1; }
.cvp-progress {
  position: relative;
  height: 4px; background: rgba(255,255,255,.18);
  border-radius: 99px; cursor: pointer;
  margin-bottom: 10px;
  transition: height .15s;
}
.cvp-progress:hover { height: 6px; }
.cvp-buf, .cvp-played {
  position: absolute; top: 0; left: 0; height: 100%;
  border-radius: 99px; width: 0%;
}
.cvp-buf    { background: rgba(255,255,255,.2); }
.cvp-played { background: var(--gold); z-index: 1; }
.cvp-pthumb {
  position: absolute; top: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 14px; height: 14px;
  border-radius: 50%; background: var(--gold2);
  z-index: 2; transition: transform .15s; pointer-events: none;
}
.cvp-progress:hover .cvp-pthumb { transform: translate(-50%, -50%) scale(1); }
.cvp-bottom {
  display: flex; align-items: center; gap: 6px;
}
.cvp-btn {
  background: none; border: none;
  color: rgba(255,255,255,.85); font-size: .95rem;
  cursor: pointer; padding: 5px 7px;
  border-radius: 4px; flex-shrink: 0;
  transition: background .15s, color .15s;
  display: flex; align-items: center; justify-content: center;
  min-width: 32px; font-family: var(--font);
}
.cvp-btn:hover { background: rgba(255,255,255,.12); color: #fff; }
.cvp-time {
  font-size: .69rem; color: rgba(255,255,255,.55);
  font-variant-numeric: tabular-nums; white-space: nowrap; flex-shrink: 0;
}
.cvp-speed {
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.8);
  border-radius: 4px; font-size: .69rem; padding: 4px 5px;
  cursor: pointer; font-family: var(--font); flex-shrink: 0;
}
.cvp-speed option { background: #111; }

/* ===================================================
   LIGHT MODE
   =================================================== */
[data-theme="light"] {
  --bg:        #f0f0f4;
  --bg2:       #e6e6ec;
  --surface:   #ffffff;
  --surface2:  #f4f4f8;
  --surface3:  #eaeaf0;
  --border:    rgba(0,0,0,.08);
  --border2:   rgba(0,0,0,.14);
  --text:      #111118;
  --text2:     #44445a;
  --muted:     #88889a;
  --muted2:    #c0c0d0;
  --gold:      #a0761a;
  --gold2:     #c08a22;
  --gold3:     #7a5a12;
  --gold-glow: rgba(160,118,26,.22);
  --gold-dim:  rgba(160,118,26,.1);
  --danger:    #c0392b;
  --success:   #27ae60;
}
[data-theme="light"] body { background: var(--bg); }
[data-theme="light"] .course-main { background: #ebebf0; }
[data-theme="light"] .lesson-info { background: #ebebf0; }
[data-theme="light"] .course-sidebar { background: var(--surface); border-right: 1px solid var(--border); }
[data-theme="light"] .module-toggle:hover { background: rgba(0,0,0,.04); }
[data-theme="light"] .lesson-item:hover { background: rgba(0,0,0,.04); }
[data-theme="light"] .lesson-item.active { background: rgba(160,118,26,.07); }
[data-theme="light"] .lesson-item-title { color: #888; }
[data-theme="light"] .lesson-item.active .lesson-item-title { color: #111; }
[data-theme="light"] .lesson-item:hover:not(.active) .lesson-item-title { color: #333; }
[data-theme="light"] .module-toggle-title { color: #aaa; }
[data-theme="light"] .sidebar-course-header { background: linear-gradient(to bottom, rgba(160,118,26,.055), transparent); }
[data-theme="light"] .sidebar-course-name { color: #111; }
[data-theme="light"] .course-topbar.ctb-scrolled { background: rgba(240,240,244,.96); box-shadow: 0 1px 0 rgba(0,0,0,.08); }
[data-theme="light"] .lesson-info-title { color: #111; }
[data-theme="light"] .lesson-body { color: #44445a; }
[data-theme="light"] .lesson-body h2,
[data-theme="light"] .lesson-body h3 { color: #222; }
[data-theme="light"] .lesson-divider { background: rgba(0,0,0,.07); }
[data-theme="light"] .attach-item { background: rgba(0,0,0,.03); border-color: rgba(0,0,0,.08); color: #222; }
[data-theme="light"] .attach-item:hover { background: rgba(0,0,0,.07); }
[data-theme="light"] .sidebar-search { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.09); color: #111; }
[data-theme="light"] .sidebar-search:focus { border-color: rgba(160,118,26,.4); background: rgba(0,0,0,.07); }
[data-theme="light"] .notes-textarea { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.09); color: #111; }
[data-theme="light"] .notes-toggle-btn { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.09); color: #444; }
[data-theme="light"] #auth-screen, [data-theme="light"] #setpw-screen { background: radial-gradient(ellipse 100% 60% at 50% -10%, rgba(160,118,26,.08) 0%, transparent 60%), var(--bg); }
[data-theme="light"] .auth-box { background: rgba(255,255,255,.95); border-color: rgba(0,0,0,.1); box-shadow: 0 0 0 1px rgba(160,118,26,.05), 0 40px 80px rgba(0,0,0,.15), inset 0 1px 0 #fff; }
[data-theme="light"] .form-group input { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.1); color: #111; }
[data-theme="light"] .form-group input:focus { border-color: rgba(160,118,26,.5); }
[data-theme="light"] .btn-primary { background: linear-gradient(135deg,var(--gold),var(--gold3)); }
[data-theme="light"] .navbar { background: rgba(240,240,244,.95); box-shadow: 0 1px 0 rgba(0,0,0,.07); }
[data-theme="light"] .dash-hero { background: linear-gradient(to bottom, rgba(160,118,26,.06), transparent); }
[data-theme="light"] .dash-section-title { color: #aaa; }
[data-theme="light"] .product-card { background: var(--surface); border-color: rgba(0,0,0,.08); }
[data-theme="light"] .product-card:hover { box-shadow: 0 24px 60px rgba(0,0,0,.12); border-color: rgba(0,0,0,.14); }
[data-theme="light"] .product-card-name { color: #111; }
[data-theme="light"] .product-card-desc { color: #666; }
[data-theme="light"] .settings-card { background: var(--surface); border-color: rgba(0,0,0,.07); }
[data-theme="light"] .settings-input { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.09); color: #111; }
[data-theme="light"] .toast { background: rgba(255,255,255,.97); border-color: rgba(0,0,0,.1); color: #111; box-shadow: 0 8px 30px rgba(0,0,0,.15); }

/* Navbar */
[data-theme="light"] .navbar.scrolled { background: rgba(240,240,244,.95); box-shadow: 0 1px 0 rgba(0,0,0,.09); border-bottom-color: rgba(0,0,0,.07); }
[data-theme="light"] .navbar-logo span { color: rgba(0,0,0,.32); }
[data-theme="light"] .nav-btn { border-color: rgba(0,0,0,.09); }
[data-theme="light"] .nav-btn:hover { border-color: rgba(0,0,0,.17); background: rgba(0,0,0,.04); }
[data-theme="light"] .nav-btn.danger { border-color: rgba(192,57,43,.18); color: rgba(192,57,43,.6); }
[data-theme="light"] .nav-btn.danger:hover { background: rgba(192,57,43,.06); border-color: rgba(192,57,43,.35); color: var(--danger); }
[data-theme="light"] .nav-avatar-wrap { border-color: rgba(0,0,0,.09); background: rgba(0,0,0,.03); }
[data-theme="light"] .nav-avatar-wrap:hover { background: rgba(0,0,0,.06); border-color: rgba(0,0,0,.14); }

/* Course topbar */
[data-theme="light"] .course-topbar { background: linear-gradient(to bottom, rgba(240,240,244,.92), transparent); }
[data-theme="light"] .course-topbar-sep { background: rgba(0,0,0,.12); }
[data-theme="light"] .course-topbar-title { color: rgba(0,0,0,.45); }
[data-theme="light"] .ctb-breadcrumb { color: rgba(0,0,0,.3); }
[data-theme="light"] .course-topbar-back { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.1); }
[data-theme="light"] .course-topbar-back:hover { background: rgba(0,0,0,.1); color: #111; border-color: rgba(0,0,0,.2); }
[data-theme="light"] .theme-btn { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.09); }
[data-theme="light"] .theme-btn:hover { background: rgba(0,0,0,.09); color: #111; }

/* Dashboard stats */
[data-theme="light"] .dash-stat-pill { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.09); }
[data-theme="light"] .dash-stat-pill strong { color: #111; }

/* Sidebar */
[data-theme="light"] .sidebar-toggle-btn { background: var(--surface); border-color: rgba(0,0,0,.09); color: var(--muted); }
[data-theme="light"] .sidebar-toggle-btn:hover { background: var(--surface2); color: var(--text); }
[data-theme="light"] .sidebar-progress-bar-wrap { background: rgba(0,0,0,.1); }
[data-theme="light"] .module-toggle-count { background: rgba(0,0,0,.06); }
[data-theme="light"] .lesson-num-badge { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.09); }
[data-theme="light"] .lesson-item:hover:not(.active) .lesson-num-badge { background: rgba(0,0,0,.08); }

/* Product card progress bar track */
[data-theme="light"] .card-progress-bar { background: rgba(0,0,0,.1); }

/* Lesson area */
[data-theme="light"] .lesson-index-badge { background: rgba(0,0,0,.06); }
[data-theme="light"] .btn-ln-prev { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.1); }
[data-theme="light"] .btn-ln-prev:hover:not(:disabled) { background: rgba(0,0,0,.1); color: #111; border-color: rgba(0,0,0,.2); }
[data-theme="light"] .btn-done.undone { background: rgba(0,0,0,.04); border-color: rgba(0,0,0,.1); }
[data-theme="light"] .lesson-meta-pill { background: rgba(0,0,0,.05); border-color: rgba(0,0,0,.08); }

/* Settings dividers */
[data-theme="light"] .settings-section + .settings-section { border-top-color: rgba(0,0,0,.07); }
[data-theme="light"] .settings-actions { border-top-color: rgba(0,0,0,.07); }

/* Audio player */
[data-theme="light"] .audio-wrap { background: linear-gradient(to right, #e8e8ee, #f0f0f6); }

/* Custom video player */
[data-theme="light"] .cvp-controls { background: linear-gradient(to top, rgba(240,240,244,.97) 0%, rgba(240,240,244,.65) 55%, transparent 100%); }
[data-theme="light"] .cvp-btn { color: rgba(0,0,0,.7); }
[data-theme="light"] .cvp-btn:hover { background: rgba(0,0,0,.08); color: #111; }
[data-theme="light"] .cvp-time { color: rgba(0,0,0,.5); }
[data-theme="light"] .cvp-speed { background: rgba(0,0,0,.07); border-color: rgba(0,0,0,.12); color: rgba(0,0,0,.75); }
[data-theme="light"] .cvp-speed option { background: #f0f0f4; }
[data-theme="light"] .cvp-progress { background: rgba(0,0,0,.18); }
[data-theme="light"] .cvp-buf { background: rgba(0,0,0,.25); }

/* ===================================================
   RESPONSIVE (updated)
   =================================================== */
@media (max-width: 768px) {
  :root { --sidebar-w: 85vw; }
  .products-grid { grid-template-columns: 1fr; }

  /* Sidebar becomes a fixed overlay drawer */
  .course-sidebar {
    position: fixed !important;
    top: var(--header-h); left: 0; bottom: 0;
    width: var(--sidebar-w) !important; max-width: 360px;
    height: auto !important; max-height: none !important;
    z-index: 300;
    border-right: none !important; border-bottom: none !important;
    transform: translateX(0);
    transition: transform .3s cubic-bezier(.4,0,.2,1), opacity .3s;
  }
  .course-sidebar.hidden {
    transform: translateX(-106%) !important;
    width: var(--sidebar-w) !important;
    opacity: 1 !important;
    overflow: auto !important;
    max-height: none !important;
  }
  .course-layout { flex-direction: row; height: 100vh; padding-top: var(--header-h); }
  .course-main { flex: 1; min-width: 0; overflow-y: auto; }

  .mobile-menu-btn { display: inline-flex !important; }
  .sidebar-toggle-btn { display: none !important; }

  .lesson-info { padding: 20px 18px 44px; }
  .lesson-info-title { font-size: 1.35rem; }
  .lesson-info-header { flex-direction: column; gap: 8px; }
  .lesson-actions-row { gap: 8px; }
  .btn-ln-next { font-size: .8rem; padding: 11px 18px; }
  .btn-ln-prev { font-size: .79rem; padding: 10px 14px; }
  .dash-hero { padding: 40px 20px 36px; }
  .dash-hero-greeting { font-size: 2rem; }
  .dash-section { padding: 28px 20px 48px; }
  .auth-box { padding: 36px 24px; }
  .player-zone { max-height: 56vw; }
  #toast-container { bottom: 16px; right: 16px; }
  .nav-avatar-name { display: none; }
  .navbar { padding: 0 20px; }
  .navbar-logo-icon { display: none; }
}
@media (min-width: 769px) {
  .course-topbar { padding: 0 28px; }
  .mobile-menu-btn { display: none !important; }
}