:root{--primary:#002d5b;--accent:#f59e0b;--success:#10b981;--error:#ef4444;--bg-gradient:linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--glass-bg:#ffffffe6;--text-main:#1e293b;--text-muted:#64748b;--font-base:1.1rem;--radius:32px;--shadow-sm:0 4px 6px -1px #0000001a;--shadow:0 10px 15px -3px #0000000d;--shadow-lg:0 20px 25px -5px #0000001a;--tap-target:64px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;outline:none;margin:0;padding:0}body{color:var(--text-main);background:#0f172a;justify-content:center;min-height:100dvh;font-family:Outfit,sans-serif;line-height:1.5;display:flex;overflow:hidden}.mobile-container{width:100%;max-width:480px;height:100dvh;padding-top:env(safe-area-inset-top);padding-right:env(safe-area-inset-right);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);background:#fff;flex-direction:column;display:flex;position:relative;overflow:hidden;box-shadow:0 0 100px #00000080}#app.lesson-mode .app-header,#app.lesson-mode .bottom-nav,#app.onboarding-mode .app-header,#app.onboarding-mode .bottom-nav{display:none!important}#app.lesson-mode main{padding-bottom:0}.app-header{z-index:1000;background:#fff;border-bottom:1px solid #f1f5f9;justify-content:space-between;align-items:center;padding:1.25rem 2rem;display:flex}.logo{align-items:center;gap:.75rem;display:flex}.logo .icon{font-size:2rem}.logo .text{color:var(--primary);letter-spacing:-.5px;font-size:1.2rem;font-weight:850}.header-points-pill{color:var(--primary);background:#f1f5f9;border-radius:50px;padding:6px 14px;font-size:.85rem;font-weight:850}main{min-height:0;padding:0;padding-bottom:calc(90px + env(safe-area-inset-bottom));scrollbar-width:none;background:#fff;flex:1;position:relative;overflow-y:auto}main::-webkit-scrollbar{display:none}.home-hero-v3{background:var(--primary);color:#fff;border-radius:0 0 40px 40px;margin-bottom:2rem;padding:3.5rem 2rem 2.5rem}.home-hero-v3 h1{margin-bottom:.5rem;font-size:2.5rem;font-weight:850}.home-hero-v3 p{opacity:.8;font-size:1.1rem;font-weight:600}.categories-explorer{padding:0 1.5rem 2rem}.big-category-card{background:var(--bg);cursor:pointer;border:4px solid #0000;border-radius:36px;margin-bottom:1.25rem;padding:1.5rem;transition:transform .2s cubic-bezier(.4,0,.2,1)}.big-category-card:active{transform:scale(.96)}.cat-card-main{align-items:center;gap:1.25rem;margin-bottom:1rem;display:flex}.cat-icon-lg{width:90px;height:90px;box-shadow:var(--shadow-sm);background:#fff;border-radius:24px;flex-shrink:0;justify-content:center;align-items:center;font-size:3.5rem;display:flex}.cat-text h3{color:var(--primary);margin:0;font-size:1.4rem;font-weight:850}.cat-text p{color:var(--text-muted);margin:0;font-size:.85rem;font-weight:600}.cat-card-footer{background:#fff;border-radius:20px;padding:1rem}.mini-bar{background:#f1f5f9;border-radius:10px;height:8px;margin-top:8px;overflow:hidden}.fill{border-radius:10px;height:100%;transition:width .8s}.detail-header{border-bottom:1px solid #0000000d;align-items:center;gap:1.5rem;padding:3rem 2rem 2.5rem;display:flex}.btn-back-square{width:56px;height:56px;box-shadow:var(--shadow);background:#fff;border:none;border-radius:18px;justify-content:center;align-items:center;font-size:1.5rem;display:flex}.header-text h2{margin:0;font-size:2.25rem;font-weight:850;line-height:1}.header-text p{opacity:.7;font-weight:700}.detail-lessons-list{padding:2rem 1.5rem 6rem}.lesson-drill-item{cursor:pointer;background:#f8fafc;border-radius:28px;align-items:center;gap:1rem;margin-bottom:1rem;padding:1.5rem;display:flex}.drill-num{width:48px;height:48px;color:var(--primary);background:#fff;border-radius:16px;justify-content:center;align-items:center;font-size:1.1rem;font-weight:850;display:flex}.is-done{background:#f0fdf4}.is-done .drill-num{background:var(--success);color:#fff}.lesson-viewer{z-index:5000;padding-bottom:env(safe-area-inset-bottom);background:#fff;flex-direction:column;display:flex;position:absolute;inset:0;overflow:hidden}.lesson-header{background:#fff;flex-shrink:0;align-items:center;gap:1rem;padding:1rem 1.5rem .5rem;display:flex}.btn-back{width:46px;height:46px;color:var(--primary);background:#f1f5f9;border:none;border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;font-size:1.3rem;font-weight:800;display:inline-flex}.lesson-progress-pills{flex:1;gap:6px;display:flex}.progress-pill{background:#e2e8f0;border-radius:10px;flex:1;height:6px}.progress-pill.active{background:var(--primary)}.step-content{flex:1;grid-template-rows:auto minmax(0,1fr) auto;align-items:center;gap:.5rem;min-height:0;padding:.5rem 1rem 0;display:grid;overflow:hidden}.step-title{text-transform:uppercase;color:var(--text-muted);margin:0;font-size:.9rem;font-weight:800}.lesson-media-container{flex:none;justify-content:center;align-items:center;width:100%;padding:.25rem 1rem;display:flex}.step-image-card{aspect-ratio:9/16;background:#f8fafc;border:4px solid #f1f5f9;border-radius:40px;width:100%;max-height:min(50dvh,420px);overflow:hidden;box-shadow:0 20px 50px #00000026}.step-image-card img{object-fit:contain;background:#f8fafc;width:100%;height:100%}.step-instructions{color:var(--primary);text-align:center;width:100%;max-height:100%;margin:0;padding:0 .75rem;font-size:clamp(1.1rem,4.6vw,1.5rem);font-weight:850;line-height:1.35;overflow-y:auto}.step-footer{width:100%;padding:.75rem 1rem calc(1rem + env(safe-area-inset-bottom));background:linear-gradient(#ffffffeb 0%,#fff 22%);flex-shrink:0}.step-footer .btn-primary{height:60px;font-size:1.2rem}@media (width<=420px),(height<=740px){.lesson-header{gap:.6rem;padding:.75rem 1rem .4rem}.btn-back{border-radius:12px;width:40px;height:40px;font-size:1.15rem}.lesson-progress-pills{gap:4px}.step-content{gap:.4rem;padding:.25rem .75rem 0}.lesson-media-container{padding:.25rem .5rem}.step-image-card{border-radius:28px;max-height:min(40dvh,320px)}.step-instructions{padding:0 .5rem;font-size:1.15rem;line-height:1.3}.step-footer{padding:.5rem .75rem calc(.75rem + env(safe-area-inset-bottom))}.step-footer .btn-primary{border-radius:16px;height:54px;font-size:1.05rem}}@media (height<=670px){.step-image-card{border-radius:22px;max-height:min(32dvh,250px)}.step-instructions{font-size:1rem;line-height:1.25}.step-footer .btn-primary{height:52px;font-size:1.1rem}}.btn-primary{background:var(--primary);color:#fff;border:none;border-radius:20px;width:100%;height:68px;font-size:1.4rem;font-weight:850;box-shadow:0 10px 30px #002d5b33}.bottom-nav{z-index:1000;height:90px;padding-bottom:env(safe-area-inset-bottom);height:calc(90px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid #f1f5f9;justify-content:space-around;align-items:center;display:flex}.nav-item{color:var(--text-muted);background:0 0;border:none;flex-direction:column;align-items:center;gap:4px;display:flex}.nav-item.active{color:var(--primary)}.nav-icon{font-size:1.75rem}.nav-label{font-size:.75rem;font-weight:800}.onboarding-container{align-items:center;height:100%;padding:3rem 2rem;display:flex}.onboarding-card{text-align:center;width:100%}.form-group{text-align:left;margin-top:2rem}.form-group label{margin-bottom:.5rem;font-weight:850;display:block}.form-group input{border:3px solid #f1f5f9;border-radius:18px;width:100%;height:64px;padding:0 1.25rem;font-family:inherit;font-size:1.25rem;font-weight:700}.fade-in{animation:.4s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.quiz-overlay{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:6000;padding:2rem;padding-bottom:calc(2rem + env(safe-area-inset-bottom));background:#0f172ae6;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.quiz-card{text-align:center;background:#fff;border-radius:40px;width:100%;padding:3rem 2rem;box-shadow:0 30px 60px #0000004d}.option-btn{width:100%;color:var(--primary);background:#fff;border:3px solid #f1f5f9;border-radius:20px;margin-top:1rem;padding:1.5rem;font-size:1.25rem;font-weight:850;transition:all .2s}.option-btn:active{background:#f1f5f9;transform:scale(.98)}.profile-view{padding:2rem}.profile-header-card{background:var(--primary);text-align:center;color:#fff;border-radius:40px;margin-bottom:2rem;padding:3.5rem 2rem}.profile-avatar{margin-bottom:1rem;font-size:4rem}.profile-name{margin-bottom:.5rem;font-size:2rem;font-weight:850}.profile-sub{opacity:.8;font-weight:600}.stat-grid{grid-template-columns:1fr 1fr;gap:1rem;display:grid}.stat-card{text-align:center;background:#fff;border:2px solid #f1f5f9;border-radius:32px;padding:2rem 1rem}.stat-value{color:var(--primary);font-size:2rem;font-weight:850;display:block}.stat-label{color:var(--text-muted);text-transform:uppercase;font-size:.8rem;font-weight:800}.badge-pill{background:#f1f5f9;border-radius:50px;margin:4px;padding:10px 20px;font-size:.9rem;font-weight:800;display:inline-block}