:root{--primary:#24a5c9;--primary-hover:#1d8ea9;--primary-glow:#24a5c940;--primary-light:#effbff;--secondary:#2c4960;--secondary-hover:#1e3345;--secondary-glow:#2c496026;--accent-emerald:#10b981;--accent-amber:#f59e0b;--bg-main:#fff;--bg-surface:#effbff;--bg-subtle:#f8fafc;--bg-card:#fff;--bg-card-hover:#fff;--bg-input:#fff;--border-subtle:#e2e8f0;--border-medium:#cbd5e1;--border-focus:#24a5c9;--text-primary:#2c4960;--text-secondary:#5a7184;--text-muted:#64748b;--text-inverse:#fff;--font-heading:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-body:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--shadow-sm:0 4px 6px -1px #2c49600d;--shadow-md:0 10px 25px -5px #2c496014;--shadow-lg:0 20px 40px -15px #2c49601f;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-smooth:.25s cubic-bezier(.4, 0, .2, 1);--header-height:76px;--max-width:1240px;--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-full:9999px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-size:16px}body{font-family:var(--font-body);background-color:var(--bg-main);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;line-height:1.6}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--text-primary);font-weight:700;line-height:1.25}h1{letter-spacing:-.02em;font-size:2.85rem}h2{letter-spacing:-.015em;font-size:2.2rem}h3{font-size:1.45rem}h4{font-size:1.15rem}p{color:var(--text-secondary)}a{color:inherit;transition:color var(--transition-fast);text-decoration:none}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}.section{padding:5rem 0}.section-title-wrap{text-align:center;max-width:680px;margin:0 auto 3.5rem}.section-badge{border-radius:var(--radius-full);background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--primary);letter-spacing:.02em;align-items:center;gap:.4rem;margin-bottom:1rem;padding:.4rem .95rem;font-size:.82rem;font-weight:600;display:inline-flex}.section-title{margin-bottom:.85rem;font-size:2.3rem}.section-subtitle{color:var(--text-secondary);font-size:1.05rem}.btn{font-family:var(--font-body);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-smooth);border:2px solid #0000;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:.95rem;font-weight:600;display:inline-flex}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 14px var(--primary-glow)}.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);box-shadow:0 6px 20px var(--primary-glow);transform:translateY(-2px)}.btn-outline{border-color:var(--secondary);color:var(--secondary);background:0 0}.btn-outline:hover{background:var(--secondary);color:#fff;transform:translateY(-2px)}.btn-secondary{background:var(--bg-subtle);color:var(--text-primary);border-color:var(--border-subtle)}.btn-secondary:hover{background:var(--border-subtle)}.btn-sm{padding:.45rem .9rem;font-size:.85rem}.btn-lg{border-radius:var(--radius-sm);padding:.95rem 2rem;font-size:1.05rem}.navbar{z-index:100;height:var(--header-height);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle);background:#fffffffa;align-items:center;display:flex;position:sticky;top:0}.navbar-container{justify-content:space-between;align-items:center;width:100%;display:flex}.navbar-logo{flex-shrink:0;align-items:center;gap:.75rem;display:flex}.navbar-logo img{object-fit:contain;width:auto;max-width:220px;height:48px}.navbar-links{align-items:center;gap:2rem;list-style:none;display:flex}.navbar-links a{color:var(--text-secondary);font-size:.95rem;font-weight:500}.navbar-links a:hover,.navbar-links a.active{color:var(--primary);font-weight:600}.navbar-desktop-actions{align-items:center;gap:.85rem;display:flex}.mobile-hamburger-btn{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);width:42px;height:42px;color:var(--text-primary);cursor:pointer;transition:all var(--transition-fast);flex-shrink:0;justify-content:center;align-items:center;display:none}.mobile-hamburger-btn:hover{background:var(--border-subtle);color:var(--primary)}.mobile-drawer-overlay{top:var(--header-height);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:99;background:#0f172a66;flex-direction:column;display:flex;position:fixed;bottom:0;left:0;right:0}.mobile-drawer-content{border-bottom:3px solid var(--primary);box-shadow:var(--shadow-lg);background:#fff;flex-direction:column;gap:1.25rem;padding:1.25rem 1.5rem 1.75rem;animation:.2s cubic-bezier(.4,0,.2,1) slideDown;display:flex}@keyframes slideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.mobile-drawer-links{flex-direction:column;gap:.5rem;display:flex}.mobile-nav-item{color:var(--text-primary);border-radius:var(--radius-sm);background:var(--bg-subtle);transition:all var(--transition-fast);border-left:3px solid #0000;padding:.85rem 1rem;font-size:.95rem;font-weight:600;display:block}.mobile-nav-item.active,.mobile-nav-item:hover{color:var(--primary);background:var(--bg-surface);border-left-color:var(--primary)}.mobile-drawer-auth{border-top:1px solid var(--border-subtle);padding-top:1.25rem}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:all var(--transition-smooth);padding:1.75rem}.card:hover{box-shadow:var(--shadow-lg);border-color:#24a5c966;transform:translateY(-4px)}.grid{gap:1.75rem;display:grid}.grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}.dashboard-stats-grid{grid-template-columns:repeat(4,1fr);gap:1.25rem;margin-bottom:2.5rem;display:grid}.course-detail-hero-grid{grid-template-columns:2fr 1fr;align-items:center;gap:3rem;display:grid}.course-detail-main-grid{grid-template-columns:2fr 1fr;gap:3rem;display:grid}.highlights-grid{grid-template-columns:1fr 1fr;gap:.85rem;display:grid}.contact-grid{grid-template-columns:1fr 1.3fr;gap:3.5rem;display:grid}.hero-trust-metrics{border-radius:var(--radius-md);border:1px solid var(--border-subtle);box-shadow:var(--shadow-sm);background:#fff;grid-template-columns:repeat(3,1fr);gap:1.5rem;padding:1.75rem;display:grid}.classroom-container{height:calc(100vh - var(--header-height));flex-direction:column;display:flex;overflow:hidden}.classroom-topbar{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;padding:.75rem 1.5rem;display:flex}.classroom-split{flex:1;display:flex;overflow:hidden}.classroom-stage{flex-direction:column;flex:1;padding:2rem;display:flex;overflow-y:auto}.classroom-sidebar{background:var(--bg-surface);border-left:1px solid var(--border-subtle);flex-direction:column;width:340px;display:flex;overflow-y:auto}@media (width<=992px){.grid-cols-3,.grid-cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-stats-grid{grid-template-columns:repeat(2,1fr)}.course-detail-hero-grid,.course-detail-main-grid,.contact-grid{grid-template-columns:1fr!important;gap:2rem!important}h1{font-size:2.35rem}h2{font-size:1.85rem}}@media (width<=768px){.container{padding:0 1rem}.grid-cols-2,.grid-cols-3,.grid-cols-4{grid-template-columns:1fr}.highlights-grid{grid-template-columns:1fr!important}.hero-trust-metrics{grid-template-columns:1fr!important;gap:1rem!important;padding:1.25rem!important}.hero-trust-metrics>div{border-bottom:1px solid var(--border-subtle);padding-bottom:.75rem;border-left:none!important;border-right:none!important}.hero-trust-metrics>div:last-child{padding-bottom:0;border-bottom:none!important}.classroom-container{min-height:calc(100vh - var(--header-height));height:auto!important;overflow:visible!important}.classroom-split{flex-direction:column!important;overflow:visible!important}.classroom-stage{padding:1rem!important;overflow-y:visible!important}.classroom-sidebar{border-top:1px solid var(--border-subtle);max-height:400px;border-left:none!important;width:100%!important}.navbar-links,.navbar-desktop-actions{display:none}.mobile-hamburger-btn{display:flex}.navbar-logo img{max-width:210px;height:46px}h1{font-size:2.1rem}.section{padding:2.5rem 0}}@media (width<=576px){.dashboard-stats-grid{grid-template-columns:repeat(2,1fr);gap:.75rem;margin-bottom:1.75rem}.dashboard-stats-grid .card{gap:.6rem!important;padding:.85rem .75rem!important}.section{padding:1.75rem 0!important}.card{padding:1.2rem}h1{font-size:1.65rem!important}h2{font-size:1.35rem!important}}.blog-content-body h2{color:var(--secondary);margin:2.25rem 0 1rem;font-size:1.85rem;line-height:1.3}.blog-content-body h3{color:var(--secondary);margin:1.75rem 0 .85rem;font-size:1.4rem;line-height:1.35}.blog-content-body p{color:var(--text-secondary);margin-bottom:1.4rem;font-size:1.05rem;line-height:1.85}.blog-content-body ul,.blog-content-body ol{color:var(--text-secondary);margin:1rem 0 1.5rem 1.5rem;line-height:1.75}.blog-content-body li{margin-bottom:.5rem}.dashboard-layout{min-height:calc(100vh - var(--header-height));background:var(--bg-subtle);display:flex}.dashboard-sidebar{border-right:1px solid var(--border-subtle);background:#fff;flex-direction:column;flex-shrink:0;width:260px;transition:width .2s;display:flex}.dashboard-sidebar-header{border-bottom:1px solid var(--border-subtle);padding:1.5rem 1.25rem 1.25rem}.dashboard-nav-group{flex-direction:column;flex:1;gap:.35rem;padding:1rem .75rem;display:flex}.dashboard-nav-btn{border-radius:var(--radius-md);width:100%;color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast);text-align:left;background:0 0;border:none;align-items:center;gap:.75rem;padding:.65rem .9rem;font-family:inherit;font-size:.9rem;font-weight:500;display:flex}.dashboard-nav-btn:hover{background:var(--bg-surface);color:var(--secondary)}.dashboard-nav-btn.active{background:var(--primary-light);color:var(--primary);font-weight:700}.dashboard-nav-badge{border-radius:var(--radius-full);background:var(--border-subtle);color:var(--text-secondary);margin-left:auto;padding:2px 7px;font-size:.75rem;font-weight:600}.dashboard-nav-btn.active .dashboard-nav-badge{background:var(--primary);color:#fff}.dashboard-content{flex:1;max-width:1400px;padding:2.25rem 2.5rem;overflow-y:auto}.stat-kpi-grid{grid-template-columns:repeat(4,1fr);gap:1.25rem;margin-bottom:2rem;display:grid}.stat-kpi-card{border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);background:#fff;align-items:center;gap:1rem;padding:1.25rem;transition:transform .2s,box-shadow .2s;display:flex}.stat-kpi-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-kpi-icon{border-radius:var(--radius-md);justify-content:center;align-items:center;width:46px;min-width:46px;height:46px;display:flex}.course-progress-hero{border-radius:var(--radius-lg);color:#fff;box-shadow:var(--shadow-md);background:linear-gradient(135deg,#2c4960 0%,#1e3345 100%);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1.75rem;margin-bottom:2.25rem;padding:2rem 2.25rem;display:flex;position:relative;overflow:hidden}.streak-bar{align-items:center;gap:.5rem;display:flex}.streak-day-dot{border-radius:50%;justify-content:center;align-items:center;width:26px;height:26px;font-size:.7rem;font-weight:700;display:flex}.streak-day-dot.active{color:#fff;background:#10b981}.streak-day-dot.inactive{background:var(--bg-subtle);color:var(--text-muted);border:1px solid var(--border-subtle)}@media (width<=1024px){.stat-kpi-grid{grid-template-columns:repeat(2,1fr)}}@media (width<=900px){.dashboard-layout{flex-direction:column}.dashboard-sidebar{border-right:none;border-bottom:1px solid var(--border-subtle);width:100%}.dashboard-nav-group{flex-direction:row;gap:.5rem;padding:.75rem;overflow-x:auto}.dashboard-nav-btn{white-space:nowrap;width:auto;padding:.5rem .85rem}.dashboard-content{padding:1.5rem 1rem}}@media (width<=576px){.stat-kpi-grid{grid-template-columns:repeat(2,1fr);gap:.75rem}.stat-kpi-card{gap:.65rem;padding:.9rem}.stat-kpi-icon{width:38px;min-width:38px;height:38px}.course-progress-hero{padding:1.5rem 1.25rem}}