:root{--mb-ink:#172033;--mb-muted:#69758b;--mb-purple:#6d4aff;--mb-indigo:#4f46e5;--mb-pink:#ec4899;--mb-cyan:#06b6d4;--mb-orange:#f97316;--mb-bg:#f6f7ff;--mb-card:#fff;--mb-line:#e7e9f2;--mb-shadow:0 16px 45px rgba(36,42,85,.09)}
.mblms4-app{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--mb-ink);background:radial-gradient(circle at 5% 0%,rgba(109,74,255,.09),transparent 28%),radial-gradient(circle at 95% 8%,rgba(236,72,153,.08),transparent 25%),var(--mb-bg);min-height:100vh;letter-spacing:.005em}.mblms4-app *{box-sizing:border-box}.mblms4-app a{color:inherit}.mblms4-app header.mblms4-header{display:flex;justify-content:space-between;align-items:center;padding:16px clamp(20px,5vw,72px);background:rgba(255,255,255,.88);border-bottom:1px solid rgba(220,224,238,.75);gap:20px;position:sticky;top:0;z-index:20;backdrop-filter:blur(18px)}.brand{display:flex!important;align-items:center;gap:10px;text-decoration:none;font-weight:900;letter-spacing:.02em}.brand small{display:block;font-weight:600;font-size:10px;color:#7b8497;letter-spacing:.04em;margin-top:2px}.brand-dot{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;color:#fff;background:linear-gradient(135deg,var(--mb-purple),var(--mb-pink));box-shadow:0 8px 20px rgba(109,74,255,.25);font-size:17px}.mblms4-app nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.mblms4-app nav a{padding:9px 12px;border-radius:10px;text-decoration:none;color:#657087;font-weight:700;font-size:13px;transition:.18s}.mblms4-app nav a:hover,.mblms4-app nav a.active{background:#f0edff;color:#5b3fe0}.mblms4-app nav .nav-logout{color:#dc315f}.mblms4-app main{max-width:1240px;margin:auto;padding:34px clamp(20px,5vw,72px) 80px}.mblms4-kicker{font-size:10px;font-weight:900;letter-spacing:.17em;color:#7157e8}.hero,.course-hero{border-radius:26px;padding:34px;margin-bottom:24px;box-shadow:var(--mb-shadow);overflow:hidden}.mblms4-hero-gradient{position:relative;color:#fff;background:linear-gradient(125deg,#4f46e5 0%,#6847e9 40%,#9a45db 70%,#ec4899 100%);min-height:235px;display:flex;align-items:center}.mblms4-hero-gradient .mblms4-kicker{color:#ddd7ff}.hero h1,.course-hero h1{font-size:clamp(30px,4vw,50px);line-height:1.05;margin:10px 0 12px;letter-spacing:-.035em}.mblms4-hero-gradient p{max-width:650px;color:rgba(255,255,255,.87);font-size:16px;line-height:1.65;margin:0}.hero-wave{font-size:.7em}.hero-orb{position:absolute;border-radius:50%;background:rgba(255,255,255,.12);filter:blur(.2px)}.hero-orb-one{width:210px;height:210px;right:-55px;top:-80px}.hero-orb-two{width:130px;height:130px;right:155px;bottom:-75px;background:rgba(255,255,255,.08)}.mblms4-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:0 0 30px}.stat-card{display:flex;align-items:center;gap:15px;background:#fff;border:1px solid var(--mb-line);border-radius:18px;padding:18px 20px;box-shadow:0 10px 28px rgba(36,42,85,.05)}.stat-icon{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;font-size:21px;font-weight:900}.stat-card strong{display:block;font-size:25px;line-height:1}.stat-card small{display:block;color:var(--mb-muted);font-weight:700;font-size:12px;margin-top:5px}.stat-indigo .stat-icon{color:#5c47df;background:#efedff}.stat-pink .stat-icon{color:#d82d78;background:#fff0f7}.stat-cyan .stat-icon{color:#087f99;background:#e7fbff}.section-title{display:flex;justify-content:space-between;align-items:end;gap:18px;margin:34px 0 15px}.section-title h2{margin:4px 0 0;font-size:24px;letter-spacing:-.02em}.mblms4-section-note{font-size:12px;color:#8993a6;font-weight:700}.horizontal,.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:18px}.horizontal{grid-auto-flow:column;grid-auto-columns:minmax(270px,1fr);overflow-x:auto;padding:2px 2px 10px}.card{background:var(--mb-card);border-radius:18px;overflow:hidden;border:1px solid var(--mb-line);box-shadow:0 8px 24px rgba(36,42,85,.05);transition:transform .2s,box-shadow .2s,border-color .2s}.course-card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(36,42,85,.12);border-color:#d8d2ff}.art{height:125px;display:block;position:relative;text-decoration:none;background:linear-gradient(135deg,#5b4ae8 0%,#7b43df 48%,#ec4899 100%);overflow:hidden}.course-card:nth-child(3n) .art{background:linear-gradient(135deg,#0284c7,#06b6d4,#5eead4)}.course-card:nth-child(3n+2) .art{background:linear-gradient(135deg,#f97316,#ec4899,#8b5cf6)}.art:before{content:"";position:absolute;width:130px;height:130px;border-radius:50%;right:-35px;top:-40px;background:rgba(255,255,255,.16)}.art:after{content:"";position:absolute;width:80px;height:80px;border-radius:24px;left:28px;bottom:-30px;background:rgba(255,255,255,.10);transform:rotate(20deg)}.course-badge{position:absolute;left:14px;top:14px;z-index:2;background:rgba(255,255,255,.93);color:#4737b7;padding:6px 9px;border-radius:999px;font-size:9px;font-weight:900;letter-spacing:.08em}.art-spark{position:absolute;right:18px;bottom:13px;color:#fff;font-size:31px;opacity:.9}.card-body{padding:18px}.course-meta{color:#7b8498;font-weight:700;font-size:11px}.card-body h3{margin:7px 0 8px;font-size:18px;letter-spacing:-.015em}.card-body p{color:#6c768b;line-height:1.55;min-height:48px;font-size:13px}.card-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:12px}.card-foot strong{font-size:16px}.card-foot del{color:#9aa2b2;font-weight:500;margin-right:4px}.card-link{color:#5a43df!important;text-decoration:none;font-weight:900;font-size:12px}.card-link span{transition:.18s}.card-link:hover span{padding-left:3px}.progress{height:9px;background:#e9eaf2;border-radius:999px;overflow:hidden;margin:12px 0 5px}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--mb-purple),var(--mb-pink));border-radius:999px}.progress-label{font-size:10px;color:#69758b;font-weight:800}.filters{display:grid;grid-template-columns:2fr 1fr 1fr 1fr auto;gap:10px;margin:0 0 20px;padding:13px;background:#fff;border:1px solid var(--mb-line);border-radius:15px;box-shadow:0 8px 22px rgba(36,42,85,.04)}.filters input,.filters select,.mblms4-card input,.assignment textarea{width:100%;padding:12px 13px;border:1px solid #dfe2ec;border-radius:10px;box-sizing:border-box;background:#fff;color:var(--mb-ink);outline:0}.filters input:focus,.filters select:focus,.mblms4-card input:focus,.assignment textarea:focus{border-color:#8b79ee;box-shadow:0 0 0 4px rgba(109,74,255,.09)}.mblms4-btn{display:inline-flex;justify-content:center;align-items:center;border:0;border-radius:11px;padding:11px 17px;cursor:pointer;text-decoration:none;font-weight:900;font-size:13px;transition:transform .18s,box-shadow .18s,filter .18s}.mblms4-btn:hover{transform:translateY(-1px);filter:brightness(1.02)}.mblms4-btn.primary{background:linear-gradient(135deg,#5a45e8,#9b45dc);color:#fff;box-shadow:0 10px 22px rgba(91,69,232,.22)}.mblms4-btn.secondary{background:#f1efff;color:#5a43df}.mblms4-btn-block{width:100%}.mblms4-auth{min-height:calc(100vh - 20px);display:grid;place-items:center;position:relative;overflow:hidden;background:linear-gradient(135deg,#f1edff 0%,#f8f5ff 45%,#fff1f7 100%);padding:35px}.mblms4-auth:before,.mblms4-auth:after{content:"";position:absolute;border-radius:50%;filter:blur(3px)}.mblms4-auth:before{width:400px;height:400px;background:rgba(109,74,255,.16);left:-120px;top:-100px}.mblms4-auth:after{width:360px;height:360px;background:rgba(236,72,153,.14);right:-100px;bottom:-90px}.mblms4-auth-glow{position:absolute;width:220px;height:220px;border-radius:50%;background:rgba(6,182,212,.10);right:30%;top:15%}.mblms4-card{background:#fff;padding:30px;border-radius:22px;max-width:480px;width:100%;box-shadow:0 25px 70px rgba(50,42,100,.15);border:1px solid rgba(255,255,255,.9);position:relative;z-index:2}.mblms4-login-card{padding:34px}.mblms4-brand-mark{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--mb-purple),var(--mb-pink));color:#fff;font-weight:1000;font-size:18px;margin-bottom:20px;box-shadow:0 10px 25px rgba(109,74,255,.25)}.mblms4-auth h1{font-size:34px;margin:9px 0 8px;letter-spacing:-.035em}.mblms4-login-note{color:#4f46a5;line-height:1.55;margin:0 0 16px;font-size:12px;font-weight:800}.mblms4-login-intro{color:#727c90;line-height:1.6;margin-bottom:24px}.mblms4-auth label{display:block;margin:15px 0;color:#344054;font-weight:800;font-size:12px}.mblms4-auth input{margin-top:7px}.mblms4-register-link{margin-top:10px}.mblms4-login-foot{font-size:10px;color:#8a93a5;text-align:center;margin-top:18px}.course-hero-vibrant{background:linear-gradient(120deg,#fff 0%,#f4f0ff 50%,#fff1f7 100%);display:flex;justify-content:space-between;align-items:center;gap:30px;border:1px solid #ebe7fa}.course-hero-content{max-width:780px}.course-hero-art{min-width:190px;height:160px;border-radius:24px;background:linear-gradient(135deg,#5a45e8,#ec4899);display:flex;align-items:center;justify-content:center;gap:12px;transform:rotate(2deg);box-shadow:0 18px 36px rgba(91,69,232,.22);color:#fff}.course-hero-art span{display:grid;place-items:center;width:45px;height:45px;border-radius:14px;background:rgba(255,255,255,.16);font-size:20px}.course-hero p{color:#667085;line-height:1.7}.price{font-size:30px;font-weight:1000;margin:20px 0;color:#4f3bc8}.course-action-panel{display:flex;justify-content:space-between;align-items:center;gap:22px;background:#fff;border:1px solid var(--mb-line);border-radius:18px;padding:20px 22px;box-shadow:0 10px 28px rgba(36,42,85,.06)}.course-action-panel>div:first-child strong,.course-action-panel>div:first-child span{display:block}.course-action-panel strong{font-size:16px}.course-action-panel span{font-size:12px;color:#7b8497;margin-top:4px}.course-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.course-actions .notice{margin:0}.wishlist-btn{border:1px solid #e1dcfb}.preview-section{margin-top:30px}.curriculum{background:#fff;border:1px solid var(--mb-line);border-radius:14px;padding:16px;margin-top:12px;box-shadow:0 6px 18px rgba(36,42,85,.04)}.curriculum b{display:block;font-size:14px;margin-bottom:6px}.curriculum span{display:block;padding:8px 0;color:#68748a;font-size:13px;border-top:1px dashed #eceef4}.language-choice{background:linear-gradient(135deg,#fff 0%,#f8f6ff 55%,#fff2f8 100%);border-radius:24px;padding:38px;box-shadow:var(--mb-shadow);max-width:860px;margin:30px auto;border:1px solid #ebe8f6;text-align:center}.language-icon{margin:0 auto 12px;display:grid;place-items:center;width:54px;height:54px;border-radius:17px;background:linear-gradient(135deg,#5a45e8,#ec4899);color:#fff;font-size:28px;box-shadow:0 10px 24px rgba(109,74,255,.2)}.language-choice h1{margin:8px 0 10px;font-size:clamp(28px,4vw,42px);letter-spacing:-.03em}.language-choice>p{color:#667085;line-height:1.65;max-width:650px;margin:0 auto}.language-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px}.language-card{margin:0}.language-card button{width:100%;text-align:left;background:#fff;border:2px solid #e5e2f2;border-radius:17px;padding:20px;cursor:pointer;transition:.18s;display:grid;grid-template-columns:auto 1fr;column-gap:13px;align-items:center}.language-card button:hover,.language-card button:focus{border-color:#806cf0;box-shadow:0 12px 26px rgba(91,69,232,.12);transform:translateY(-2px)}.language-card strong,.language-card button>span:not(.language-symbol),.language-card em{display:block}.language-card strong{font-size:20px;color:#202943}.language-card button>span:not(.language-symbol){margin-top:4px;color:#778196;font-size:12px}.language-card em{grid-column:2;margin-top:13px;font-style:normal;font-weight:900;color:#5c43dc;font-size:12px}.language-symbol{grid-row:span 2;display:grid!important;place-items:center;width:48px;height:48px;border-radius:14px;background:#efedff;color:#5c43dc;font-weight:1000}.language-pill{background:#eefcf7;color:#16845d!important;border-radius:999px;padding:7px 11px!important;font-size:10px!important;font-weight:900!important}.learning-hero{position:relative;background:linear-gradient(125deg,#4f46e5,#6947e6 55%,#06b6d4);color:#fff;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.learning-hero .mblms4-kicker{color:#dcd8ff}.learning-hero p{color:rgba(255,255,255,.82);margin:0}.learning-hero .progress{grid-column:1/-1;background:rgba(255,255,255,.22);margin:0}.learning-hero .progress i{background:linear-gradient(90deg,#fff,#a7f3d0)}.learning-progress{text-align:right}.learning-progress strong{display:block;font-size:32px}.learning-progress span{font-size:11px;color:rgba(255,255,255,.78);font-weight:800}.sequence-note{display:flex;align-items:center;gap:13px;background:#f0edff;border:1px solid #dfd9ff;border-radius:14px;padding:14px 16px;color:#4b3cb5;margin:20px 0 25px}.sequence-note>span{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:#6d4aff;color:#fff;font-weight:1000}.sequence-note strong{font-size:13px}.sequence-note p{margin:3px 0 0;color:#6d6590;font-size:11px}.part{margin:28px 0}.part-heading{display:flex;align-items:center;gap:10px;margin-bottom:12px}.part-heading h2{margin:0;font-size:21px}.part-chip{font-size:9px;font-weight:1000;letter-spacing:.1em;padding:5px 7px;border-radius:7px;color:#fff;background:linear-gradient(135deg,#5a45e8,#9b45dc)}.module{background:#fff;border:1px solid var(--mb-line);border-radius:18px;padding:20px;margin:13px 0;box-shadow:0 8px 24px rgba(36,42,85,.05);transition:.18s}.module.available{border-color:#d9d1ff;box-shadow:0 12px 28px rgba(91,69,232,.08)}.module.completed{border-color:#bcebd9}.module.locked{background:#fbfbfd;opacity:.86}.module-top{display:grid;grid-template-columns:auto 1fr auto;gap:13px;align-items:start}.module-number{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:#efedff;color:#5a43df;font-weight:1000}.module-top h3{margin:1px 0 4px;font-size:17px}.module-top p{margin:0;color:#7a8497;font-size:12px;line-height:1.5}.module-state{font-size:10px;font-weight:900;padding:7px 9px;border-radius:999px;background:#f1efff;color:#5a43df;white-space:nowrap}.completed .module-state{background:#e8fbf3;color:#16845d}.locked .module-state{background:#f1f2f5;color:#7d8696}.video-list{display:grid;gap:14px;margin:18px 0}.video{background:#f8f9fd;border-radius:13px;padding:10px;border:1px solid #e7e9f2}.video-label{font-size:10px;text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:#727c91;margin:2px 3px 8px}.youtube{aspect-ratio:16/9;background:#10131a;border-radius:9px;overflow:hidden}.youtube iframe{width:100%;height:100%;border:0}.completion-btn{margin-top:4px}.locked-message{margin-top:15px;background:#f5f6f9;border-radius:10px;padding:12px;color:#7c8698;font-size:12px;font-weight:700}.assignment,.announcement{background:#fff;border:1px solid var(--mb-line);border-radius:14px;padding:16px;margin-top:15px;box-shadow:0 6px 18px rgba(36,42,85,.04)}.assignment h4,.announcement h3{margin-top:0}.assignment p,.assignment div,.announcement div{color:#69758b;line-height:1.6;font-size:13px}.assignment textarea{margin:8px 0}.announcement{border-left:4px solid #8b5cf6}.notice{padding:12px 14px;background:#fff6dc;color:#8a6213;border-radius:10px;margin:15px 0;font-size:12px;font-weight:700}.mblms4-small{font-size:12px;color:#7b8497;line-height:1.6}.mblms4-empty-state{text-align:center;background:#fff;border:1px dashed #d8dbea;border-radius:18px;padding:45px}.mblms4-empty-state span{font-size:30px}.mblms4-empty-state h3{margin:8px 0}.mblms4-empty-state p{color:#7c8698}.announcements-section{margin-top:38px}
@media(max-width:900px){.filters{grid-template-columns:1fr 1fr}.filters input{grid-column:1/-1}.course-action-panel{align-items:flex-start;flex-direction:column}.course-hero-art{min-width:150px}.mblms4-stat-grid{grid-template-columns:1fr}.learning-hero{grid-template-columns:1fr}.learning-progress{text-align:left}.learning-hero .progress{grid-column:auto}}
@media(max-width:760px){.mblms4-app header.mblms4-header{align-items:flex-start;padding:13px 18px;position:relative}.mblms4-app nav{justify-content:flex-end}.mblms4-app nav a{font-size:11px;padding:7px 8px}.brand-dot{width:32px;height:32px}.mblms4-app main{padding:22px 16px 55px}.hero,.course-hero{padding:24px;border-radius:20px}.mblms4-hero-gradient{min-height:220px}.hero-orb-one{right:-90px}.horizontal{grid-auto-columns:minmax(250px,86%)}.course-hero-vibrant{flex-direction:column;align-items:stretch}.course-hero-art{width:100%;min-width:0;height:100px}.language-cards{grid-template-columns:1fr}.language-choice{padding:24px 18px}.module-top{grid-template-columns:auto 1fr}.module-state{grid-column:2;justify-self:start}.filters{grid-template-columns:1fr}.filters input{grid-column:auto}.course-actions{width:100%}.course-actions .mblms4-btn,.course-actions form{width:100%}.course-actions form .mblms4-btn{width:100%}.mblms4-auth{padding:20px}.mblms4-login-card{padding:28px 22px}}

.mblms4-course-action button[disabled]{opacity:.65;cursor:wait}
.mblms4-action-message{margin:.6rem 0;padding:.65rem .85rem;border-radius:10px;font-size:.9rem}
.mblms4-action-message.success{background:rgba(34,197,94,.12)}
.mblms4-action-message.error{background:rgba(239,68,68,.12)}

/* v4.5.6 dashboard tabbed navigation */
.mblms4-dashboard-tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:26px 0 22px;padding:8px;background:#f5f4fb;border:1px solid #e7e4f2;border-radius:18px;position:sticky;top:10px;z-index:20;box-shadow:0 8px 24px rgba(36,42,85,.06)}
.mblms4-dashboard-tab{appearance:none;border:1px solid transparent;background:transparent;border-radius:13px;padding:13px 12px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:9px;text-align:left;cursor:pointer;color:#5e687c;min-width:0;transition:.18s}
.mblms4-dashboard-tab:hover{background:#fff;border-color:#e2def4;color:#4635b4}
.mblms4-dashboard-tab.active{background:#fff;border-color:#dcd6fb;color:#4937b9;box-shadow:0 8px 20px rgba(91,69,232,.09)}
.mblms4-dashboard-tab .tab-icon{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:#ebe8ff;font-weight:1000;font-size:15px;color:#5a45d8}
.mblms4-dashboard-tab .tab-copy{min-width:0}
.mblms4-dashboard-tab .tab-copy strong,.mblms4-dashboard-tab .tab-copy small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mblms4-dashboard-tab .tab-copy strong{font-size:12px;color:inherit}
.mblms4-dashboard-tab .tab-copy small{font-size:9px;margin-top:3px;color:#8991a2}
.mblms4-dashboard-tab .tab-count{display:grid;place-items:center;min-width:26px;height:24px;padding:0 7px;border-radius:999px;background:#eef0f6;color:#566075;font-size:10px;font-weight:1000}
.mblms4-dashboard-tab.active .tab-count{background:#eeeaff;color:#533fc7}
.mblms4-dashboard-panel{animation:mblms4-panel-in .18s ease}
.mblms4-dashboard-panel[hidden]{display:none!important}
@keyframes mblms4-panel-in{from{opacity:.45;transform:translateY(4px)}to{opacity:1;transform:none}}
@media(max-width:1050px){.mblms4-dashboard-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:650px){.mblms4-dashboard-tabs{grid-template-columns:repeat(2,minmax(0,1fr));position:static}.mblms4-dashboard-tab{padding:10px}.mblms4-dashboard-tab .tab-copy small{display:none}.mblms4-dashboard-tab .tab-count{justify-self:end}}
.learning-video-shell{position:relative}.learning-video-shell .youtube{position:relative}.learning-video-shell .youtube iframe{width:100%;height:100%;border:0;display:block}

/* v4.5.10: use the native YouTube embedded-player controls exclusively. */
.learning-video-controls{display:none!important}
.learning-video-shell .youtube{position:relative}
.learning-video-shell .youtube iframe{width:100%;height:100%;border:0;display:block}