@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Inter:wght@400;500;600&display=swap";:root{--primary:#4f46e5;--primary-light:#818cf8;--secondary:#10b981;--background:#f3f4f6;--surface:#fff;--surface-glass:#fffc;--text-main:#111827;--text-muted:#6b7280;--border:#e5e7eb;--radius-lg:1.5rem;--radius-md:1rem;--radius-sm:.5rem;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-glow:0 0 20px #4f46e526}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--background);color:var(--text-main);background-image:radial-gradient(at 0 0,#100f1500 0,#0000 50%),radial-gradient(at 50% 0,#2f3e6a0d 0,#0000 50%),radial-gradient(at 100% 0,#7227410d 0,#0000 50%);min-height:100vh;font-family:Inter,sans-serif;line-height:1.6}h1,h2,h3,h4,h5,h6{letter-spacing:-.025em;font-family:Outfit,sans-serif;font-weight:600}a{color:inherit;text-decoration:none}.app-container{flex-direction:column;min-height:100vh;display:flex}@media (width>=768px){.app-container{flex-direction:row}}.sidebar{background:var(--surface);border-right:1px solid var(--border);flex-direction:column;width:280px;height:100vh;padding:2rem 1.5rem;display:none;position:sticky;top:0}@media (width>=768px){.sidebar{display:flex}}.sidebar-nav{-ms-overflow-style:none;scrollbar-width:none}.sidebar-nav::-webkit-scrollbar{display:none}.logo{color:var(--primary);align-items:center;gap:.5rem;margin-bottom:2.5rem;font-size:1.5rem;font-weight:700;display:flex}.nav-link{border-radius:var(--radius-md);color:var(--text-muted);align-items:center;gap:1rem;margin-bottom:.5rem;padding:.75rem 1rem;font-weight:500;transition:all .2s;display:flex}.nav-link:hover{background:var(--background);color:var(--primary)}.nav-link.active{background:var(--primary);color:#fff;box-shadow:var(--shadow-glow)}.main-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:2rem}.page-title{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:.25rem;font-size:1.8rem;line-height:1.2}.page-subtitle{color:var(--text-muted);margin-bottom:2rem;font-size:.85rem}@media (width>=768px){.page-title{margin-bottom:.5rem;font-size:2.5rem}.page-subtitle{margin-bottom:2.5rem;font-size:1.1rem}}.dashboard-header{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2rem;display:flex}.search-bar{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);flex:1;align-items:center;max-width:400px;padding:.5rem 1rem;display:flex}.search-bar input{width:100%;color:var(--text-main);background:0 0;border:none;outline:none;padding:.5rem;font-family:inherit}.search-bar svg{color:var(--text-muted)}.header-actions{align-items:center;gap:1rem;display:flex}.streak-badge{color:#ea580c;background:#ffedd5;border-radius:2rem;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.875rem;font-weight:600;display:flex}.user-avatar{background:var(--primary-light);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.1rem;font-weight:600;display:flex}.category-pills{flex-wrap:wrap;gap:1rem;margin-bottom:1rem;padding-bottom:1rem;display:flex}.pill{background:var(--surface);border:1px solid var(--border);color:var(--text-muted);cursor:pointer;white-space:nowrap;border-radius:2rem;align-items:center;gap:.5rem;padding:.5rem 1.25rem;font-size:.9rem;font-weight:500;transition:all .2s;display:flex}.pill:hover{border-color:var(--primary-light);color:var(--primary)}.pill.active{border-color:var(--primary);color:var(--primary);box-shadow:0 0 0 1px var(--primary)}.dashboard-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;display:grid}.dashboard-card{border-radius:var(--radius-lg);cursor:pointer;background:#0f111a;flex-direction:column;min-height:380px;transition:transform .3s,box-shadow .3s;display:flex;position:relative;overflow:hidden}.dashboard-card:hover{box-shadow:var(--shadow-lg), var(--shadow-glow);transform:translateY(-5px)}.dashboard-card-top{flex:1;padding:2rem 1.5rem}.card-day{color:#fb923c;margin-bottom:.5rem;font-size:.85rem;font-weight:600}.card-title{color:#fff;margin-bottom:.5rem;font-size:1.5rem;font-weight:700;line-height:1.2}.card-topic{color:#fb923c;font-size:.85rem;font-weight:500}.dashboard-card-bottom{background:#141623cc;border-top:1px solid #ffffff0d;justify-content:center;align-items:center;height:140px;display:flex}.dashboard-play-btn{color:#fff;border:2px solid #fff9;border-radius:50%;justify-content:center;align-items:center;width:50px;height:50px;transition:all .2s;display:flex}.dashboard-card:hover .dashboard-play-btn{background:#ffffff1a;border-color:#fff;transform:scale(1.1)}.video-container{border-radius:var(--radius-lg);width:100%;max-width:450px;box-shadow:var(--shadow-lg);aspect-ratio:9/16;background:#000;margin:0 auto 2rem;overflow:hidden}video{object-fit:cover;width:100%;height:100%}.content-area{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:2.5rem}.markdown-content h1{color:var(--text-main);margin-bottom:1.5rem;font-size:2rem}.markdown-content h2{color:var(--primary);margin-top:2rem;margin-bottom:1rem;font-size:1.5rem}.markdown-content p{color:var(--text-muted);margin-bottom:1rem;font-size:1.1rem}.markdown-content ul{margin-bottom:1.5rem;padding-left:1.5rem}.markdown-content li{color:var(--text-muted);margin-bottom:.5rem;font-size:1.1rem}.markdown-content strong{color:var(--text-main)}.mobile-header{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;padding:1rem 1.5rem;display:flex;position:sticky;top:0}@media (width>=768px){.mobile-header{display:none}}.loading{min-height:200px;color:var(--primary);justify-content:center;align-items:center;font-size:1.2rem;font-weight:500;display:flex}.spinner{margin-right:.5rem;animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.lesson-page-container{flex-direction:column;gap:2rem;display:flex}@media (width>=1024px){.lesson-page-container{flex-direction:row;align-items:flex-start}}.lesson-left-panel{flex:none;width:100%}@media (width>=1024px){.lesson-left-panel{width:350px;position:sticky;top:2rem}}.lesson-right-panel{background:var(--surface);border-radius:var(--radius-lg);min-width:0;box-shadow:var(--shadow-md);flex:1;padding:2.5rem}.video-card{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);color:#fff;background:#0f111a;flex-direction:column;display:flex;overflow:hidden}.video-header{padding:1.5rem}.video-subtitle{color:#fb923c;margin-bottom:.5rem;font-size:.85rem;font-weight:600}.video-title{color:#fff;margin-bottom:.5rem;font-size:1.5rem;font-weight:700;line-height:1.2}.video-topic{color:#60a5fa;font-size:.85rem}.video-wrapper{aspect-ratio:9/16;background:#000;width:100%}.video-wrapper video{object-fit:cover;width:100%;height:100%}.lesson-navigation{justify-content:center;gap:1rem;margin-top:1.5rem;display:flex}.nav-btn{border-radius:var(--radius-md);flex:1;justify-content:center;align-items:center;gap:.5rem;max-width:150px;padding:.75rem 1.5rem;font-size:.9rem;font-weight:600;transition:all .2s;display:flex}.nav-btn.prev{background:var(--surface);color:var(--text-main);border:1px solid var(--border)}.nav-btn.prev:hover{background:var(--background)}.nav-btn.next{background:var(--primary);color:#fff;box-shadow:var(--shadow-glow)}.nav-btn.next:hover{background:var(--primary-light)}.nav-btn.disabled{background:var(--background);color:var(--text-muted);cursor:not-allowed;border:1px solid var(--border);box-shadow:none}.lesson-content-header{border-bottom:1px solid var(--border);margin-bottom:2rem;padding-bottom:1.5rem}.lesson-day-badge{color:var(--primary);text-transform:uppercase;letter-spacing:.1em;font-size:.75rem;font-weight:700}.lesson-main-title{color:var(--text-main);margin:.5rem 0;font-size:2rem;font-weight:700}.lesson-subtitle{color:var(--text-muted);font-size:1rem}.lesson-items{flex-direction:column;gap:2.5rem;display:flex}.lesson-item{flex-direction:column;gap:.5rem;display:flex}.item-header{align-items:center;gap:.75rem;margin-bottom:.25rem;display:flex}.item-number{color:var(--primary);background:#eef2ff;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:.9rem;font-weight:700;display:flex}.item-title{color:var(--text-main);margin:0;font-size:1.25rem;font-weight:700}.idiom-badge{color:#ea580c;background:#ffedd5;border-radius:4px;align-self:flex-start;margin-bottom:.5rem;padding:.15rem .5rem;font-size:.75rem;font-weight:600;display:inline-block}.item-thai{color:var(--text-main);font-size:1rem;font-weight:600}.thai-label{color:var(--text-muted);font-weight:400}.example-box{background:var(--background);border-left:4px solid var(--primary-light);border-radius:0 var(--radius-md) var(--radius-md) 0;margin-top:.75rem;padding:1.25rem}.example-eng{color:var(--text-main);margin-bottom:.5rem;font-style:italic}.example-thai{color:var(--text-muted);font-size:.9rem}