@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Plus+Jakarta+Sans:wght@500;600;700;800&display=swap";
:root{--primary-50:#eff6ff;--primary-100:#dbeafe;--primary-500:#3b82f6;--primary-600:#2563eb;--accent-400:#fbbf24;--accent-500:#f59e0b;--accent-600:#d97706;--secondary-500:#8b5cf6;--secondary-600:#7c3aed;--success-50:#ecfdf5;--success-500:#10b981;--warning-500:#f59e0b;--danger-50:#fef2f2;--danger-500:#ef4444;--background:#f8fafc;--foreground:#334155;--heading:#0f172a;--surface:#fff;--surface-hover:#f1f5f9;--border:#e2e8f0;--gradient-primary:linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);--gradient-hover:linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);--gradient-accent:linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);--shadow-sm:0 2px 4px #0f172a0a;--shadow-md:0 4px 12px #0f172a0f, 0 2px 4px #0f172a0a;--shadow-lg:0 12px 24px #0f172a14, 0 4px 12px #0f172a0f;--shadow-primary:0 8px 16px #3b82f640;--shadow-accent:0 8px 16px #f59e0b40;--glass-bg:#ffffffd9;--glass-border:#fff6;--glass-blur:blur(16px);--radius-sm:.5rem;--radius-md:.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--radius-full:9999px;--bounce:cubic-bezier(.34, 1.56, .64, 1);--smooth:cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--background);background-image:radial-gradient(var(--border) 1px, transparent 1px);color:var(--foreground);-webkit-font-smoothing:antialiased;background-size:20px 20px;min-height:100vh;font-family:Inter,sans-serif;line-height:1.6}h1,h2,h3,h4,h5,h6{color:var(--heading);letter-spacing:-.02em;font-family:Plus Jakarta Sans,sans-serif}a{color:inherit;text-decoration:none}button{cursor:pointer;background:0 0;border:none;font-family:Plus Jakarta Sans,sans-serif}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);transition:box-shadow .3s var(--smooth), transform .3s var(--bounce)}.glass-panel:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.btn-primary{background:var(--gradient-primary);color:#fff;border-radius:var(--radius-full);transition:all .4s var(--bounce);box-shadow:var(--shadow-primary);justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.75rem;font-size:1rem;font-weight:700;display:inline-flex}.btn-primary:hover:not(:disabled){transform:translateY(-3px)scale(1.02);box-shadow:0 12px 20px #3b82f659}.btn-primary:active:not(:disabled){transform:translateY(1px)scale(.98)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;box-shadow:none;transform:none}.btn-outline{color:var(--primary-600);border:2px solid var(--primary-100);border-radius:var(--radius-full);transition:all .3s var(--smooth);background:#fff;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.75rem;font-size:1rem;font-weight:700;display:inline-flex}.btn-outline:hover{border-color:var(--primary-500);background:var(--primary-50);color:var(--primary-700);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.btn-accent{background:var(--gradient-accent);color:#fff;border-radius:var(--radius-full);transition:all .4s var(--bounce);box-shadow:var(--shadow-accent);padding:.75rem 1.75rem;font-weight:700}.btn-accent:hover{transform:translateY(-3px)scale(1.02);box-shadow:0 12px 20px #f59e0b59}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex-direction:column;flex:1;display:flex}.topnav{z-index:40;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffffeb;border-bottom:1px solid #e2e8f0e6;position:sticky;top:0;box-shadow:0 1px 12px #0f172a0a}.topnav-inner{align-items:center;gap:1.25rem;max-width:1240px;height:70px;margin:0 auto;padding:0 1.75rem;display:flex}.brand{flex-shrink:0;align-items:center;gap:.7rem;text-decoration:none;display:flex}.brand-mark{background:var(--gradient-primary);border-radius:12px;justify-content:center;align-items:center;width:40px;height:40px;display:flex;box-shadow:0 4px 10px #3b82f64d}.brand-name{color:var(--heading);font-family:Plus Jakarta Sans,sans-serif;font-size:1.25rem;font-weight:800;line-height:1.15;display:block}.brand-sub{color:#94a3b8;font-size:.72rem;font-weight:500;display:block}.nav-main{align-items:center;gap:.25rem;margin-left:1rem;display:flex}.nav-link{border-radius:var(--radius-full);color:var(--foreground);cursor:pointer;white-space:nowrap;transition:background .2s var(--smooth), color .2s var(--smooth);background:0 0;border:none;align-items:center;gap:.45rem;padding:.55rem .95rem;font-size:.94rem;font-weight:600;text-decoration:none;display:inline-flex}.nav-link:hover{background:var(--surface-hover);color:var(--heading)}.nav-link-active{background:var(--primary-50);color:var(--primary-600)}.nav-dropdown{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);min-width:232px;box-shadow:var(--shadow-lg);z-index:50;animation:navFade .16s var(--smooth);flex-direction:column;gap:.15rem;padding:.4rem;display:flex;position:absolute;top:calc(100% + .5rem);left:0}@keyframes navFade{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}.nav-dropdown-item{border-radius:var(--radius-md);color:var(--foreground);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:.6rem;padding:.6rem .75rem;font-size:.9rem;font-weight:600;text-decoration:none;display:flex}.nav-dropdown-item:hover{background:var(--surface-hover);color:var(--heading)}.nav-dropdown-item.is-active{background:var(--primary-50);color:var(--primary-600)}.nav-right{align-items:center;gap:.6rem;margin-left:auto;display:flex}.nav-user{border-radius:var(--radius-full);border:1px solid var(--border);background:var(--surface);cursor:pointer;color:var(--foreground);align-items:center;gap:.55rem;padding:.35rem .75rem .35rem .35rem;font-weight:600;display:inline-flex}.nav-user:hover{background:var(--surface-hover)}.nav-avatar{background:var(--gradient-primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:.9rem;font-weight:700;display:flex}.nav-user-name{text-overflow:ellipsis;white-space:nowrap;max-width:130px;font-size:.9rem;overflow:hidden}.nav-login{align-items:center;gap:.45rem;padding:.6rem 1.1rem;text-decoration:none;display:inline-flex}.nav-burger{border:1px solid var(--border);background:var(--surface);border-radius:var(--radius-md);cursor:pointer;color:var(--foreground);padding:.4rem;display:none}.nav-mobile{border-top:1px solid var(--border);flex-direction:column;gap:.15rem;padding:.6rem 1.25rem 1.1rem;display:none}.nav-mobile-link{border-radius:var(--radius-md);color:var(--foreground);align-items:center;gap:.6rem;padding:.7rem .5rem;font-weight:600;text-decoration:none;display:flex}.nav-mobile-link:hover{background:var(--surface-hover)}.nav-mobile-sub{padding-left:1.6rem;font-size:.92rem;font-weight:500}.nav-mobile-label{color:#94a3b8;text-transform:uppercase;letter-spacing:.06em;padding:.7rem .5rem .3rem;font-size:.72rem;font-weight:800}@media (max-width:900px){.nav-main{display:none}.nav-burger{display:flex}.nav-user-name{display:none}.nav-mobile{display:flex}.brand-sub{display:none}}.header{background:0 0;justify-content:space-between;align-items:center;gap:1rem;width:100%;max-width:1240px;margin:0 auto;padding:1.5rem 1.75rem 0;display:flex}.header h2{color:#64748b;font-weight:700;font-size:1.05rem!important}.page-container{flex:1;width:100%;max-width:1240px;margin:0 auto;padding:1.5rem 1.75rem 3rem}h1{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:.5rem;font-size:2.75rem;font-weight:800}h2{margin-bottom:1rem;font-size:1.5rem;font-weight:700}.subtitle{color:#64748b;margin-bottom:2.5rem;font-size:1.15rem;font-weight:500}.form-group{margin-bottom:1.5rem}.form-label{color:var(--heading);margin-bottom:.5rem;font-family:Plus Jakarta Sans,sans-serif;font-size:.95rem;font-weight:600;display:block}.form-input{border-radius:var(--radius-md);width:100%;transition:all .3s var(--smooth);color:var(--heading);background-color:#f8fafc;border:2px solid #0000;padding:.875rem 1.25rem;font-family:Inter,sans-serif;font-size:1rem}.form-input:hover{background-color:#f1f5f9}.form-input:focus{border-color:var(--primary-500);box-shadow:0 0 0 4px var(--primary-100);background-color:#fff;outline:none}.form-select{border-radius:var(--radius-md);width:100%;color:var(--heading);cursor:pointer;appearance:none;transition:all .3s var(--smooth);background-color:#f8fafc;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%233b82f6'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2.5' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");background-position:right 1.25rem center;background-repeat:no-repeat;background-size:1.2em 1.2em;border:2px solid #0000;padding:.875rem 1.25rem;font-family:Inter,sans-serif;font-size:1rem}.form-select:hover{background-color:#f1f5f9}.form-select:focus{border-color:var(--primary-500);box-shadow:0 0 0 4px var(--primary-100);background-color:#fff;outline:none}input[type=range]{-webkit-appearance:none;background:0 0;width:100%}input[type=range]:focus{outline:none}input[type=range]::-webkit-slider-runnable-track{cursor:pointer;border-radius:var(--radius-full);background:#e2e8f0;width:100%;height:8px}input[type=range]::-webkit-slider-thumb{background:var(--primary-500);cursor:pointer;-webkit-appearance:none;width:20px;height:20px;transition:transform .2s var(--bounce);border-radius:50%;margin-top:-6px;box-shadow:0 2px 6px #3b82f666}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}.card{background:var(--surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);transition:all .3s var(--smooth);border:1px solid #e2e8f099;padding:1.75rem}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}.lesson-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:transform .25s var(--smooth), box-shadow .25s var(--smooth), border-color .25s var(--smooth);flex-direction:column;display:flex;overflow:hidden}.lesson-card:hover{box-shadow:var(--shadow-lg);border-color:#c7d2fe;transform:translateY(-4px)}.lesson-thumb{cursor:pointer;border:none;width:100%;height:132px;padding:0;display:block;position:relative;overflow:hidden}.lesson-thumb-glow{background:radial-gradient(circle at 30% 20%,#ffffff59,#0000 55%);position:absolute;inset:0}.lesson-play{width:52px;height:52px;transition:transform .25s var(--bounce), background .25s var(--smooth);background:#ffffff38;border:2px solid #ffffffd9;border-radius:50%;justify-content:center;align-items:center;padding-left:3px;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.lesson-thumb:hover .lesson-play{background:#ffffff57;transform:translate(-50%,-50%)scale(1.12)}.lesson-desc{color:#64748b;-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;font-size:.83rem;line-height:1.5;display:-webkit-box;overflow:hidden}.lesson-practice{color:var(--primary-600);border-radius:var(--radius-full);transition:background .2s var(--smooth);align-items:center;gap:.15rem;padding:.3rem .55rem;font-size:.82rem;font-weight:700;text-decoration:none;display:inline-flex}.lesson-practice:hover{background:var(--primary-50)}