/* ============================================================
   Newton the Tutor — LMS Platform Styles
   Modeled after Wonderful Writers LMS reference design
   Dark theme with purple/gold Newton brand accent
   ============================================================ */

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

:root {
  --nt-purple:    #7c3aed;
  --nt-purple-dk: #5b21b6;
  --nt-purple-lt: #a855f7;
  --nt-gold:      #f59e0b;
  --nt-gold-lt:   #fcd34d;
  --nt-bg:        #0d0f1a;
  --nt-bg2:       #111827;
  --nt-bg3:       #1f2937;
  --nt-surface:   rgba(255,255,255,0.04);
  --nt-border:    rgba(255,255,255,0.08);
  --nt-text:      #f1f5f9;
  --nt-text2:     rgba(241,245,249,0.65);
  --nt-text3:     rgba(241,245,249,0.40);
  --nt-success:   #10b981;
  --nt-danger:    #ef4444;
  --nt-warning:   #f59e0b;
  --nt-info:      #3b82f6;
  --nt-sidebar-w: 260px;
  --nt-topbar-h:  64px;
  --nt-radius:    12px;
  --nt-radius-sm: 8px;
  --nt-shadow:    0 4px 24px rgba(0,0,0,0.35);
  --nt-font:      'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  --nt-font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition:   0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--nt-font);
  background: var(--nt-bg);
  color: var(--nt-text);
  font-size: 0.9375rem;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--nt-purple-lt); text-decoration: none; }
a:hover { color: var(--nt-gold); }
img { max-width: 100%; }

/* ── Layout ──────────────────────────────────────────────── */
.lms-layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.lms-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--nt-sidebar-w);
  height: 100vh;
  background: linear-gradient(180deg, #0f0728 0%, #0d0f1a 100%);
  border-right: 1px solid var(--nt-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  transition: transform var(--transition);
}

.lms-sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--nt-border);
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.lms-sidebar-brand img {
  height: 36px;
  width: auto;
  object-fit: contain;
}
.lms-sidebar-brand-text { line-height: 1.2; }
.lms-sidebar-brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--nt-purple-lt), var(--nt-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.lms-sidebar-brand-sub {
  font-size: 0.7rem;
  color: var(--nt-text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lms-sidebar-nav { padding: 16px 0; flex: 1; }

.lms-nav-section {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--nt-text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 16px 20px 6px;
}

.lms-nav-link {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 20px;
  color: var(--nt-text2);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 0;
  transition: all var(--transition);
  position: relative;
  text-decoration: none;
  cursor: pointer;
}
.lms-nav-link i { width: 18px; text-align: center; font-size: 0.95rem; opacity: 0.8; }
.lms-nav-link:hover {
  color: var(--nt-text);
  background: rgba(124,58,237,0.12);
}
.lms-nav-link.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(124,58,237,0.25) 0%, transparent 100%);
  border-left: 3px solid var(--nt-purple-lt);
  padding-left: 17px;
  font-weight: 600;
}
.lms-nav-link.active i { opacity: 1; color: var(--nt-purple-lt); }

.lms-sidebar-user {
  padding: 16px 20px;
  border-top: 1px solid var(--nt-border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.lms-sidebar-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--nt-purple), var(--nt-purple-lt));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; color: #fff;
  flex-shrink: 0;
}
.lms-sidebar-user-info { flex: 1; min-width: 0; }
.lms-sidebar-user-name { font-size: 0.85rem; font-weight: 600; color: var(--nt-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lms-sidebar-user-role { font-size: 0.72rem; color: var(--nt-text3); text-transform: capitalize; }

/* ── Main Content ─────────────────────────────────────────── */
.lms-main {
  margin-left: var(--nt-sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Topbar ──────────────────────────────────────────────── */
.lms-topbar {
  height: var(--nt-topbar-h);
  background: rgba(13,15,26,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nt-border);
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.lms-topbar-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--nt-text);
}
.lms-topbar-actions { display: flex; align-items: center; gap: 12px; }

/* Mobile hamburger */
.lms-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--nt-text);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 6px;
}

/* ── Page Content ────────────────────────────────────────── */
.lms-content {
  padding: 28px;
  flex: 1;
}

/* ── Hero Banner ─────────────────────────────────────────── */
.nt-hero {
  background: linear-gradient(135deg, rgba(124,58,237,0.2) 0%, rgba(245,158,11,0.1) 100%);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: var(--nt-radius);
  padding: 28px 32px;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.nt-hero h2 { font-size: 1.5rem; font-weight: 800; color: #fff; margin-bottom: 4px; }
.nt-hero p  { color: var(--nt-text2); font-size: 0.9rem; }
.nt-hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ── Stat Cards ──────────────────────────────────────────── */
.nt-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}
.nt-stat-card {
  background: var(--nt-surface);
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}
.nt-stat-card:hover { border-color: rgba(124,58,237,0.3); transform: translateY(-2px); }
.nt-stat-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60px; height: 60px;
  border-radius: 0 0 0 60px;
  opacity: 0.1;
}
.nt-stat-card.purple::before { background: var(--nt-purple-lt); }
.nt-stat-card.gold::before   { background: var(--nt-gold); }
.nt-stat-card.green::before  { background: var(--nt-success); }
.nt-stat-card.blue::before   { background: var(--nt-info); }
.nt-stat-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  margin-bottom: 14px;
}
.nt-stat-card.purple .nt-stat-icon { background: rgba(124,58,237,0.2); color: var(--nt-purple-lt); }
.nt-stat-card.gold .nt-stat-icon   { background: rgba(245,158,11,0.2);  color: var(--nt-gold); }
.nt-stat-card.green .nt-stat-icon  { background: rgba(16,185,129,0.2);  color: var(--nt-success); }
.nt-stat-card.blue .nt-stat-icon   { background: rgba(59,130,246,0.2);  color: var(--nt-info); }
.nt-stat-value { font-size: 2rem; font-weight: 800; color: #fff; line-height: 1; }
.nt-stat-label { font-size: 0.8rem; color: var(--nt-text3); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.06em; }

/* ── Section Cards ───────────────────────────────────────── */
.nt-card {
  background: var(--nt-surface);
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius);
  padding: 24px;
  margin-bottom: 24px;
}
.nt-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
  flex-wrap: wrap;
}
.nt-card-title { font-size: 1.05rem; font-weight: 700; color: var(--nt-text); }

/* ── Grid layouts ─────────────────────────────────────────── */
.nt-grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.nt-grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }

/* ── Course Cards ─────────────────────────────────────────── */
.nt-course-card {
  background: var(--nt-surface);
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.nt-course-card:hover { border-color: rgba(124,58,237,0.4); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(124,58,237,0.15); }
.nt-course-thumb {
  width: 100%; height: 160px;
  background: linear-gradient(135deg, var(--nt-purple-dk), var(--nt-bg3));
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  overflow: hidden;
  position: relative;
}
.nt-course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.nt-course-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.nt-course-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  background: rgba(124,58,237,0.2);
  color: var(--nt-purple-lt);
}
.nt-course-title { font-size: 0.95rem; font-weight: 700; color: var(--nt-text); margin-bottom: 8px; line-height: 1.4; }
.nt-course-meta { font-size: 0.8rem; color: var(--nt-text3); display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.nt-course-meta i { margin-right: 4px; }
.nt-progress-bar {
  height: 5px;
  background: var(--nt-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 6px;
}
.nt-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--nt-purple), var(--nt-purple-lt));
  border-radius: 3px;
  transition: width 0.5s ease;
}
.nt-course-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--nt-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* ── Tables ───────────────────────────────────────────────── */
.nt-table-wrap { overflow-x: auto; border-radius: var(--nt-radius-sm); }
.nt-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.nt-table th {
  background: var(--nt-bg3);
  color: var(--nt-text3);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 10px 16px;
  text-align: left;
  white-space: nowrap;
}
.nt-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--nt-border);
  color: var(--nt-text2);
  vertical-align: middle;
}
.nt-table tr:last-child td { border-bottom: none; }
.nt-table tr:hover td { background: rgba(255,255,255,0.02); }
.nt-table .nt-td-name { font-weight: 600; color: var(--nt-text); }

/* ── Buttons ──────────────────────────────────────────────── */
.nt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--nt-font);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1;
}
.nt-btn i { font-size: 0.8rem; }
.nt-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.nt-btn-primary {
  background: linear-gradient(135deg, var(--nt-purple), var(--nt-purple-lt));
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,0.35);
}
.nt-btn-primary:hover { box-shadow: 0 6px 20px rgba(124,58,237,0.5); transform: translateY(-1px); color: #fff; }

.nt-btn-gold {
  background: linear-gradient(135deg, var(--nt-gold), var(--nt-gold-lt));
  color: #1a1400;
  box-shadow: 0 4px 14px rgba(245,158,11,0.3);
}
.nt-btn-gold:hover { box-shadow: 0 6px 20px rgba(245,158,11,0.5); transform: translateY(-1px); color: #1a1400; }

.nt-btn-outline {
  background: transparent;
  color: var(--nt-text2);
  border: 1px solid var(--nt-border);
}
.nt-btn-outline:hover { border-color: var(--nt-purple-lt); color: var(--nt-purple-lt); background: rgba(124,58,237,0.08); }

.nt-btn-danger {
  background: rgba(239,68,68,0.15);
  color: #f87171;
  border: 1px solid rgba(239,68,68,0.2);
}
.nt-btn-danger:hover { background: rgba(239,68,68,0.25); color: #ef4444; }

.nt-btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.nt-btn-xs { padding: 4px 10px; font-size: 0.75rem; }
.nt-btn-lg { padding: 13px 30px; font-size: 0.95rem; }

/* ── Forms ────────────────────────────────────────────────── */
.nt-form-group { margin-bottom: 18px; }
.nt-form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--nt-text2);
  margin-bottom: 7px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.nt-form-label .req { color: var(--nt-danger); margin-left: 2px; }
.nt-input, .nt-select, .nt-textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius-sm);
  padding: 10px 14px;
  color: var(--nt-text);
  font-family: var(--nt-font);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.nt-input:focus, .nt-select:focus, .nt-textarea:focus {
  border-color: var(--nt-purple);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
}
.nt-input::placeholder { color: var(--nt-text3); }
.nt-select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath d='M5.23 7.21a.75.75 0 011.06.02L10 11.17l3.71-3.94a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; background-size: 16px; padding-right: 34px; }
.nt-textarea { resize: vertical; min-height: 100px; }
.nt-select option { background: var(--nt-bg2); }
.nt-form-hint { font-size: 0.78rem; color: var(--nt-text3); margin-top: 5px; }
.nt-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ── Alerts ───────────────────────────────────────────────── */
.nt-alert {
  padding: 14px 18px;
  border-radius: var(--nt-radius-sm);
  margin-bottom: 20px;
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.5;
}
.nt-alert i { flex-shrink: 0; margin-top: 1px; }
.nt-alert-success { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.25); color: #6ee7b7; }
.nt-alert-error   { background: rgba(239,68,68,0.12);  border: 1px solid rgba(239,68,68,0.25);  color: #fca5a5; }
.nt-alert-info    { background: rgba(59,130,246,0.12); border: 1px solid rgba(59,130,246,0.25); color: #93c5fd; }
.nt-alert-warning { background: rgba(245,158,11,0.12); border: 1px solid rgba(245,158,11,0.25); color: #fcd34d; }

/* ── Badges ───────────────────────────────────────────────── */
.nt-badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.nt-badge-active   { background: rgba(16,185,129,0.15);  color: #34d399; }
.nt-badge-inactive { background: rgba(107,114,128,0.15); color: #9ca3af; }
.nt-badge-draft    { background: rgba(245,158,11,0.15);  color: #fbbf24; }
.nt-badge-purple   { background: rgba(124,58,237,0.15);  color: #a78bfa; }
.nt-badge-danger   { background: rgba(239,68,68,0.15);   color: #f87171; }

/* ── Breadcrumb ───────────────────────────────────────────── */
.nt-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--nt-text3);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.nt-breadcrumb a { color: var(--nt-text3); text-decoration: none; }
.nt-breadcrumb a:hover { color: var(--nt-purple-lt); }
.nt-breadcrumb .sep { opacity: 0.4; }
.nt-breadcrumb .current { color: var(--nt-text2); font-weight: 500; }

/* ── Empty State ──────────────────────────────────────────── */
.nt-empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--nt-text3);
}
.nt-empty-icon { font-size: 3rem; margin-bottom: 16px; opacity: 0.4; }
.nt-empty h3 { font-size: 1rem; font-weight: 600; color: var(--nt-text2); margin-bottom: 6px; }
.nt-empty p  { font-size: 0.875rem; }

/* ── Progress ─────────────────────────────────────────────── */
.nt-progress {
  height: 8px;
  background: var(--nt-border);
  border-radius: 4px;
  overflow: hidden;
}
.nt-progress-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--nt-purple), var(--nt-purple-lt));
  transition: width 0.6s ease;
}

/* ── Modal ────────────────────────────────────────────────── */
.nt-modal-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.nt-modal-overlay.active { display: flex; }
.nt-modal {
  background: var(--nt-bg2);
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius);
  padding: 28px;
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.nt-modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.nt-modal-title { font-size: 1.1rem; font-weight: 700; color: var(--nt-text); }
.nt-modal-close { background: none; border: none; color: var(--nt-text3); font-size: 1.2rem; cursor: pointer; padding: 4px; }
.nt-modal-close:hover { color: var(--nt-text); }

/* ── Pagination ───────────────────────────────────────────── */
.nt-pagination {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}
.nt-page-btn {
  min-width: 36px; height: 36px;
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius-sm);
  background: var(--nt-surface);
  color: var(--nt-text2);
  font-size: 0.875rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none;
  transition: all var(--transition);
}
.nt-page-btn:hover, .nt-page-btn.active {
  background: var(--nt-purple);
  border-color: var(--nt-purple);
  color: #fff;
}

/* ── Module/Lesson builder ────────────────────────────────── */
.nt-builder-module {
  border: 1px solid var(--nt-border);
  border-radius: var(--nt-radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
}
.nt-builder-module-header {
  background: rgba(124,58,237,0.1);
  border-bottom: 1px solid var(--nt-border);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.nt-builder-module-title { font-weight: 600; font-size: 0.9rem; flex: 1; }
.nt-builder-module-body { padding: 14px; }
.nt-builder-lesson {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.02);
  border-radius: var(--nt-radius-sm);
  margin-bottom: 8px;
  border: 1px solid var(--nt-border);
}
.nt-builder-lesson-icon { color: var(--nt-text3); }
.nt-builder-lesson-title { flex: 1; font-size: 0.87rem; color: var(--nt-text2); }

/* ── Accordion / Steps ─────────────────────────────────────── */
.nt-steps {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.nt-step {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--nt-border);
  color: var(--nt-text3);
  cursor: pointer;
  transition: all var(--transition);
}
.nt-step.active {
  background: linear-gradient(135deg, var(--nt-purple), var(--nt-purple-lt));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,0.3);
}
.nt-step-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}
.nt-step.active .nt-step-num { background: rgba(255,255,255,0.2); }

/* ── Login page ───────────────────────────────────────────── */
.nt-auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at 20% 50%, rgba(124,58,237,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(245,158,11,0.08) 0%, transparent 50%),
              var(--nt-bg);
  padding: 24px;
}
.nt-auth-card {
  background: var(--nt-bg2);
  border: 1px solid var(--nt-border);
  border-radius: 20px;
  padding: 44px 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
.nt-auth-brand {
  text-align: center;
  margin-bottom: 32px;
}
.nt-auth-brand img { height: 48px; margin-bottom: 12px; }
.nt-auth-brand h1 { font-size: 1.3rem; font-weight: 800; color: #fff; }
.nt-auth-brand p  { font-size: 0.85rem; color: var(--nt-text3); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .lms-sidebar {
    transform: translateX(-100%);
  }
  .lms-sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,0.5); }
  .lms-sidebar-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
    display: none;
  }
  .lms-sidebar-overlay.active { display: block; }
  .lms-main { margin-left: 0; }
  .lms-hamburger { display: flex; }
  .lms-content { padding: 20px; }
  .nt-form-row { grid-template-columns: 1fr; }
  .nt-grid-2, .nt-grid-3 { grid-template-columns: 1fr; }
  .nt-auth-card { padding: 32px 24px; }
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(124,58,237,0.35); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(124,58,237,0.6); }

/* ── Animations ───────────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.15); }
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.nt-fade-in { animation: fadeIn 0.3s ease both; }