:root{color:#1f2937;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:radial-gradient(1200px 600px at 20% -20%,#7c3aed2e,#0000 55%),radial-gradient(900px 520px at 90% 10%,#1118271f,#0000 55%),#f3f4f6;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0}#app,.app-shell{min-height:100vh}.app-main{max-width:1000px;margin:0 auto;padding:22px 16px 44px}.app-header{z-index:10;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#fff;border-bottom:1px solid #e5e7eb;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;display:flex;position:sticky;top:0}.app-header__left{align-items:center;gap:8px;display:flex}.app-title{margin:0;font-size:20px}.app-subtitle{color:#6b7280;font-size:14px}.app-header__nav{align-items:center;gap:10px;display:flex}.app-header__nav a{color:#111827;background:0 0;border:1px solid #0000;border-radius:999px;padding:8px 10px;font-weight:700;text-decoration:none}.app-header__nav a.active{color:#7c3aed;background:#7c3aed14;border-color:#7c3aed40}.page{flex-direction:column;gap:16px;display:flex}.page--auth{justify-content:center;align-items:center;min-height:calc(100vh - 130px)}.page-header{justify-content:space-between;align-items:center;display:flex}.section{flex-direction:column;gap:12px;display:flex}.section__head h3{margin:0}.section__head p{margin:4px 0 0}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;box-shadow:0 8px 24px #1118270f}.card h2,.card h3{margin:0 0 8px}.auth-card{flex-direction:column;gap:10px;width:100%;max-width:460px;display:flex}.card-list{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;display:grid}.course-card{flex-direction:column;gap:8px;padding:0;display:flex;overflow:hidden}.course-cover{aspect-ratio:1;background:radial-gradient(600px 240px at 20% 10%,#7c3aed66,#0000 55%),radial-gradient(520px 220px at 90% 30%,#11182747,#0000 60%),linear-gradient(135deg,#111827,#312e81);border-bottom:1px solid #e5e7eb;width:100%;position:relative}.course-cover__img{object-fit:cover;width:100%;height:100%;display:block}.course-cover__placeholder{justify-content:flex-start;align-items:flex-end;width:100%;height:100%;padding:12px;display:flex}.course-cover__badge{color:#ffffffeb;letter-spacing:.02em;text-transform:uppercase;background:#ffffff1a;border:1px solid #ffffff38;border-radius:999px;align-items:center;gap:8px;padding:6px 10px;font-size:12px;font-weight:800;display:inline-flex}.course-card__title{-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:2.4em;margin:0 0 6px;font-size:16px;line-height:1.2;display:-webkit-box;overflow:hidden}.course-card__body{flex-direction:column;flex:1;gap:6px;min-height:132px;padding:14px 16px 6px;display:flex}.course-card__desc{-webkit-line-clamp:3;-webkit-box-orient:vertical;min-height:4.2em;line-height:1.4;display:-webkit-box;overflow:hidden}.course-card__desc--empty{-webkit-user-select:none;user-select:none;color:#0000}.course-actions{gap:10px;margin-top:auto;padding:0 16px 16px;display:flex}label{font-size:14px;font-weight:600}input{border:1px solid #d1d5db;border-radius:8px;width:100%;padding:10px;font-size:16px}.checkbox-list{flex-direction:column;gap:10px;margin-top:8px;display:flex}.checkbox-row{color:#111827;align-items:flex-start;gap:10px;font-size:14px;font-weight:600;display:flex}.checkbox-row input[type=checkbox]{width:18px;height:18px;margin-top:2px}button{cursor:pointer;color:#fff;background:#111827;border:0;border-radius:8px;padding:10px 14px;font-weight:600;transition:transform .12s,filter .12s}button:hover:not(:disabled){filter:brightness(1.02);transform:translateY(-1px)}button.secondary{background:#374151}button.accent{background:#7c3aed}button:disabled{opacity:.6;cursor:not-allowed}.logout-button{background:#ef4444}.muted{color:#6b7280;margin:0}.profile-grid{flex-direction:column;gap:10px;margin-top:12px;display:flex}.profile-row{background:#fff;border:1px solid #e5e7eb;border-radius:10px;grid-template-columns:140px 1fr;gap:10px;padding:10px 12px;display:grid}.profile-row__label{color:#6b7280;font-weight:700}.profile-row__value{color:#111827;word-break:break-word;font-weight:700}.error{color:#dc2626;margin:0}.success{color:#059669;margin:0}.back-link{color:#4b5563;text-decoration:none}.lesson-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.lesson-row{border:1px solid #e5e7eb;border-radius:8px;justify-content:space-between;align-items:center;gap:10px;padding:10px;display:flex}.lesson-title{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.lesson-meta{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.pill--warn{color:#92400e;border-color:#fde68a}.pill--info{color:#1e40af;border-color:#bfdbfe}.pill--muted{color:#6b7280;border-color:#e5e7eb}.pill{color:#4b5563;white-space:nowrap;border:1px solid #d1d5db;border-radius:20px;padding:4px 8px;font-size:12px}.pill--ok{color:#166534;border-color:#86efac}.price{margin:10px 0;font-size:20px;font-weight:700}@media (width<=640px){.app-main{padding:18px 12px 36px}.card-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.course-card__body{min-height:124px;padding:12px 12px 6px}.course-actions{padding:0 12px 12px}}