/* WebTech – shared styles (website + panels). Bootstrap 5.3 base. */
:root { --panel-bg: #f4f6fb; --panel-surface: #fff; --brand: #4f46e5; --brand-dark: color-mix(in srgb, var(--brand) 80%, #000); --sidebar-w: 250px; }
body { font-family: "Segoe UI", system-ui, -apple-system, "Noto Sans Gujarati", Roboto, sans-serif; }
.text-brand { color: var(--brand) !important; }
.bg-brand { background: var(--brand) !important; color: #fff; }
.btn-brand { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-brand:hover, .btn-brand:focus { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-outline-brand { border-color: var(--brand); color: var(--brand); }
.btn-outline-brand:hover { background: var(--brand); color: #fff; }
a { color: var(--brand); }
.navbar .nav-link.active { color: var(--brand) !important; font-weight: 600; }

/* Hero / banners */
.hero { background: linear-gradient(135deg, var(--brand), #0ea5e9); color: #fff; }
.hero .carousel-item { min-height: 340px; }
.hero-banner { min-height: 340px; background-size: cover; background-position: center; position: relative; }
.hero-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,.65), rgba(0,0,0,.1)); }
.hero-banner > * { position: relative; }

/* Course cards */
.course-card { border: 0; border-radius: 14px; overflow: hidden; box-shadow: 0 2px 12px rgba(20,20,60,.08); transition: transform .15s, box-shadow .15s; height: 100%; }
.course-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(20,20,60,.14); }
.course-card .thumb { aspect-ratio: 16/9; object-fit: cover; width: 100%; background: var(--bs-tertiary-bg); }
.course-card .card-title { font-size: 1rem; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.5em; }
.course-card a.stretched-link { color: inherit; text-decoration: none; }
.access-badge { position: absolute; top: 10px; left: 10px; }
.price-old { text-decoration: line-through; color: #888; font-size: .85em; }
.rating-stars { color: #f59e0b; }
.section-title { font-weight: 700; }
.category-pill { border-radius: 999px; }
.teacher-avatar { width: 96px; height: 96px; object-fit: cover; border-radius: 50%; }

/* Plans */
.plan-card { border-radius: 16px; border: 2px solid transparent; }
.plan-card.popular { border-color: var(--brand); }
.plan-card .price { font-size: 2.2rem; font-weight: 800; }

/* Player */
.player-wrap { position: relative; background: #000; border-radius: 12px; overflow: hidden; aspect-ratio: 16/9; user-select: none; -webkit-user-select: none; }
.player-wrap video, .player-wrap iframe { width: 100%; height: 100%; border: 0; display: block; background: #000; }
.player-watermark { position: absolute; z-index: 5; pointer-events: none; color: rgba(255,255,255,.55); font-size: clamp(10px, 1.6vw, 15px); font-weight: 600;
  text-shadow: 0 0 3px rgba(0,0,0,.8); white-space: nowrap; transition: top 1.2s ease, left 1.2s ease; }
.player-lock { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; flex-direction: column; color: #fff; text-align: center; padding: 1rem;
  background: radial-gradient(circle, rgba(30,30,60,.85), rgba(0,0,0,.95)); }
.lesson-list .list-group-item { font-size: .92rem; }
.lesson-list .list-group-item.active { background: color-mix(in srgb, var(--brand) 14%, var(--bs-body-bg)); color: var(--bs-emphasis-color); border-color: var(--bs-border-color); font-weight: 600; }
.progress-thin { height: 6px; }

/* Panels */
body.panel { background: var(--panel-bg); }
.panel-wrap { display: flex; min-height: 100vh; }
.panel-sidebar { width: var(--sidebar-w); background: #111827; color: #cbd5e1; flex-shrink: 0; }
@media (min-width: 992px) { .panel-sidebar { position: sticky; top: 0; height: 100vh; overflow-y: auto; } }
.panel-brand { padding: 1rem 1.1rem; background: var(--brand); }
.panel-menu { padding: .5rem 0 2rem; }
.panel-menu-heading { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: #94a3b8; padding: 1rem 1.2rem .3rem; }
.panel-menu a { display: flex; align-items: center; gap: .7rem; padding: .55rem 1.2rem; color: #cbd5e1; text-decoration: none; font-size: .92rem; border-left: 3px solid transparent; }
.panel-menu a:hover { background: #1f2937; color: #fff; }
.panel-menu a.active { background: #1f2937; color: #fff; border-left-color: var(--brand); }
.panel-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.panel-topbar { background: var(--panel-surface); padding: .7rem 1.2rem; border-bottom: 1px solid var(--bs-border-color); position: sticky; top: 0; z-index: 1020; }
.panel-content { padding: 1.2rem; flex: 1; }
.panel-footer { padding: .8rem 1.2rem; }
.stat-card { border: 0; border-radius: 14px; box-shadow: 0 1px 6px rgba(0,0,0,.06); }
.stat-card .stat-icon { width: 46px; height: 46px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; font-size: 1.3rem; }
.card { border-radius: 12px; }
.panel .card { border: 0; box-shadow: 0 1px 6px rgba(0,0,0,.06); }
.table > :not(caption) > * > * { vertical-align: middle; }
.table-thumb { width: 72px; aspect-ratio: 16/9; object-fit: cover; border-radius: 6px; }
.sortable-handle { cursor: grab; }
.log-box { background: #0f172a; color: #d1fae5; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .8rem; max-height: 420px; overflow: auto; padding: 1rem; border-radius: 8px; white-space: pre-wrap; }
.chart-bars { display: flex; align-items: flex-end; gap: 4px; height: 160px; }
.chart-bars .bar { flex: 1; background: var(--brand); border-radius: 4px 4px 0 0; min-height: 2px; position: relative; }
.chart-bars .bar:hover::after { content: attr(data-label); position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%); background: #111; color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 4px; white-space: nowrap; }

/* Invoice print */
@media print { .no-print, nav, footer, .navbar { display: none !important; } body { background: #fff !important; } .invoice-box { box-shadow: none !important; } }
.invoice-box { max-width: 820px; margin: auto; background: #fff; padding: 2rem; box-shadow: 0 1px 10px rgba(0,0,0,.08); border-radius: 10px; }

@media (max-width: 575.98px) {
  .panel-content { padding: .75rem; }
  .hero .display-5 { font-size: 1.8rem; }
}

/* ---------- Theme: light / dark (Bootstrap data-bs-theme) ---------- */
.theme-toggle .dropdown-item.active { background: var(--brand); color: #fff; }
[data-bs-theme="dark"] {
  --panel-bg: #0b1120;
  --panel-surface: #111827;
  --bs-body-bg: #0f172a;
  --bs-body-color: #e2e8f0;
  --bs-secondary-color: #a3b1c6;
  --bs-tertiary-bg: #1e293b;
  --bs-border-color: #334155;
  --bs-emphasis-color: #f8fafc;
  color-scheme: dark;
}
[data-bs-theme="dark"] body.panel { background: var(--panel-bg); }
[data-bs-theme="dark"] .card,
[data-bs-theme="dark"] .modal-content,
[data-bs-theme="dark"] .dropdown-menu,
[data-bs-theme="dark"] .list-group-item { background-color: #111827; color: var(--bs-body-color); border-color: var(--bs-border-color); }
[data-bs-theme="dark"] .panel .card, [data-bs-theme="dark"] .stat-card, [data-bs-theme="dark"] .course-card { box-shadow: 0 0 0 1px #1f2a3d, 0 2px 10px rgba(0,0,0,.45); }
/* elements that Bootstrap keeps white in dark mode */
[data-bs-theme="dark"] .bg-white,
[data-bs-theme="dark"] .bg-body { background-color: #111827 !important; color: var(--bs-body-color); }
[data-bs-theme="dark"] .bg-light { background-color: #1e293b !important; color: var(--bs-body-color); }
[data-bs-theme="dark"] .text-dark { color: var(--bs-emphasis-color) !important; }
[data-bs-theme="dark"] .text-muted, [data-bs-theme="dark"] .text-secondary, [data-bs-theme="dark"] .form-text { color: #a3b1c6 !important; }
[data-bs-theme="dark"] .text-bg-light { background-color: #334155 !important; color: #f1f5f9 !important; }
[data-bs-theme="dark"] .table { --bs-table-bg: transparent; --bs-table-color: var(--bs-body-color); --bs-table-border-color: var(--bs-border-color);
  --bs-table-striped-bg: rgba(255,255,255,.035); --bs-table-hover-bg: rgba(255,255,255,.06); --bs-table-hover-color: var(--bs-emphasis-color); }
[data-bs-theme="dark"] .table-light, [data-bs-theme="dark"] .table > thead.table-light > tr > th, [data-bs-theme="dark"] thead.table-light th {
  --bs-table-bg: #1e293b; --bs-table-color: #e2e8f0; --bs-table-border-color: #334155; background-color: #1e293b !important; color: #e2e8f0 !important; }
[data-bs-theme="dark"] .btn-light { --bs-btn-bg: #1e293b; --bs-btn-color: #e2e8f0; --bs-btn-border-color: #334155;
  --bs-btn-hover-bg: #334155; --bs-btn-hover-color: #fff; --bs-btn-hover-border-color: #475569; --bs-btn-active-bg: #334155; --bs-btn-active-color: #fff; }
[data-bs-theme="dark"] .btn-outline-dark { --bs-btn-color: #e2e8f0; --bs-btn-border-color: #64748b; --bs-btn-hover-bg: #e2e8f0; --bs-btn-hover-color: #0f172a; }
[data-bs-theme="dark"] .btn-outline-secondary { --bs-btn-color: #cbd5e1; --bs-btn-border-color: #64748b; }
[data-bs-theme="dark"] .form-control, [data-bs-theme="dark"] .form-select, [data-bs-theme="dark"] .input-group-text {
  background-color: #0b1220; color: #f1f5f9; border-color: #3b4a61; }
[data-bs-theme="dark"] .form-control::placeholder { color: #7c8aa0; }
[data-bs-theme="dark"] .form-control:disabled, [data-bs-theme="dark"] .form-control[readonly] { background-color: #1a2333; color: #a3b1c6; }
[data-bs-theme="dark"] .form-check-input { background-color: #0b1220; border-color: #64748b; }
[data-bs-theme="dark"] .nav-tabs { --bs-nav-tabs-link-active-bg: #111827; --bs-nav-tabs-link-active-color: #fff; --bs-nav-tabs-border-color: #334155; --bs-nav-tabs-link-active-border-color: #334155 #334155 #111827; }
[data-bs-theme="dark"] .nav-link { color: #cbd5e1; }
[data-bs-theme="dark"] .nav-pills .nav-link.active, [data-bs-theme="dark"] .page-item.active .page-link { background-color: var(--brand); border-color: var(--brand); color: #fff; }
[data-bs-theme="dark"] .page-link { background-color: #111827; border-color: #334155; color: #cbd5e1; }
[data-bs-theme="dark"] .alert-light { background: #1e293b; color: #e2e8f0; border-color: #334155; }
[data-bs-theme="dark"] .badge.text-bg-warning { color: #111 !important; }
[data-bs-theme="dark"] .navbar { background-color: #111827 !important; border-color: #1f2a3d !important; }
[data-bs-theme="dark"] .navbar .nav-link, [data-bs-theme="dark"] .navbar-brand { color: #e2e8f0; }
[data-bs-theme="dark"] .invoice-box { background: #111827; }
[data-bs-theme="dark"] a:not(.btn):not(.nav-link):not(.dropdown-item):not(.page-link):not(.list-group-item) { color: color-mix(in srgb, var(--brand) 55%, #fff); }
[data-bs-theme="dark"] .panel-menu a, [data-bs-theme="dark"] .panel-brand a { color: #cbd5e1; }
[data-bs-theme="dark"] .panel-menu a.active, [data-bs-theme="dark"] .panel-menu a:hover, [data-bs-theme="dark"] .panel-brand a { color: #fff; }
[data-bs-theme="dark"] .panel-sidebar { background: #060b16; border-right: 1px solid #1f2a3d; }
[data-bs-theme="dark"] .chart-bars .bar { background: color-mix(in srgb, var(--brand) 75%, #fff); }
[data-bs-theme="dark"] .text-bg-light.border, [data-bs-theme="dark"] .border { border-color: var(--bs-border-color) !important; }
@media print { [data-bs-theme="dark"] body, [data-bs-theme="dark"] .invoice-box { background: #fff !important; color: #000 !important; } }
.list-group-item.active { background-color: var(--brand) !important; border-color: var(--brand) !important; color: #fff !important; }
.lesson-list .list-group-item.active { background: color-mix(in srgb, var(--brand) 14%, var(--bs-body-bg)) !important; color: var(--bs-emphasis-color) !important; border-color: var(--bs-border-color) !important; }
[data-bs-theme="dark"] .list-group-item-action:hover:not(.active) { background-color: #1e293b; color: #fff; }

/* Mobile: the sidebar is an off-canvas drawer – make its menu scrollable by touch */
@media (max-width: 991.98px) {
  .panel-sidebar.offcanvas-lg { display: flex; flex-direction: column; height: 100vh; height: 100dvh; max-width: 85vw; }
  .panel-sidebar .panel-brand { flex: 0 0 auto; }
  .panel-sidebar .panel-menu { flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; touch-action: pan-y; padding-bottom: 4rem; }
  .panel-menu a { padding-top: .7rem; padding-bottom: .7rem; } /* bigger touch targets */
}

/* Bootstrap makes .offcanvas-lg transparent on desktop – keep the sidebar dark (readable) in every theme */
.panel-sidebar.offcanvas-lg { background-color: #111827 !important; color: #cbd5e1; }
[data-bs-theme="dark"] .panel-sidebar.offcanvas-lg { background-color: #060b16 !important; }
.panel-sidebar .panel-menu a { color: #cbd5e1 !important; }
.panel-sidebar .panel-menu a:hover, .panel-sidebar .panel-menu a.active, .panel-sidebar .panel-brand a { color: #fff !important; }
.helpline-bar { background: var(--brand); color: #fff; }
.helpline-bar a:hover { opacity: .85; }

/* ---------- App-style bottom menu (phones / tablets) + PWA install banner ---------- */
.bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 1045; display: flex; justify-content: space-around; align-items: stretch;
  background: var(--bs-body-bg); border-top: 1px solid var(--bs-border-color); box-shadow: 0 -2px 12px rgba(0,0,0,.08);
  padding-bottom: env(safe-area-inset-bottom); }
.bottom-nav-item { flex: 1 1 0; min-width: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  padding: 7px 2px 6px; font-size: .7rem; line-height: 1.1; color: var(--bs-secondary-color); text-decoration: none; background: none; border: 0; }
.bottom-nav-item i { font-size: 1.3rem; }
.bottom-nav-item span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bottom-nav-item.active, .bottom-nav-item:hover { color: var(--brand); }
.bottom-nav-item.active span { font-weight: 600; }
@media (max-width: 991.98px) {
  body.site, body.panel { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
  body.has-pwa-banner { padding-bottom: calc(140px + env(safe-area-inset-bottom)); }
  .site-footer { margin-top: 2rem !important; }
}
.pwa-banner { position: fixed; left: 10px; right: 10px; z-index: 1046; display: flex; align-items: center; gap: .6rem; padding: .6rem .75rem;
  background: var(--bs-body-bg); border: 1px solid var(--bs-border-color); border-radius: 14px;
  bottom: calc(72px + env(safe-area-inset-bottom)); }
.pwa-banner.d-none { display: none !important; }
@media (min-width: 992px) { .pwa-banner { left: auto; right: 20px; bottom: 20px; width: 380px; } }
[data-bs-theme="dark"] .bottom-nav, [data-bs-theme="dark"] .pwa-banner { background: #0b1220; border-color: #1f2a3d; }
/* Installed app: feel native (no text selection highlight flashes / overscroll glow on the menu) */
html.is-pwa .bottom-nav { user-select: none; -webkit-user-select: none; }
html.is-pwa .bottom-nav-item { -webkit-tap-highlight-color: transparent; }
.pwa-banner .btn-brand { white-space: nowrap; }