@import"https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700;800&display=swap";:root{--bg: #e7f0ff;--bg-soft: #d9e9ff;--surface: rgba(255, 255, 255, .9);--surface-strong: #ffffff;--text: #102542;--muted: #567094;--accent: #0b63d1;--accent-strong: #09489a;--ring: rgba(11, 99, 209, .2);--line: rgba(20, 62, 120, .16);--shadow: 0 18px 46px rgba(11, 53, 112, .14);font-family:Sora,Trebuchet MS,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:radial-gradient(circle at 9% 0%,#4f91ff57 0,#4f91ff00 38%),radial-gradient(circle at 97% 2%,#a5d0ff94 0,#a5d0ff00 42%),linear-gradient(160deg,var(--bg) 0%,var(--bg-soft) 100%);color:var(--text)}.app{max-width:980px;margin:0 auto;padding:18px 14px 28px}.hero{background:linear-gradient(130deg,#ffffffeb,#ffffffbd);border:1px solid rgba(255,255,255,.96);box-shadow:var(--shadow);border-radius:24px;padding:18px 18px 14px}.hero__eyebrow{display:inline-block;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-strong);font-weight:700;margin-bottom:10px}.hero h1{margin:0;font-size:clamp(24px,3.6vw,34px);line-height:1.08}.hero p{margin:10px 0 0;color:var(--muted)}.toolbar{margin-top:14px;display:flex;justify-content:space-between;align-items:center;gap:10px}.toolbar span{font-size:13px;color:var(--muted)}.auth-card{margin-top:14px;border-radius:18px;border:1px solid var(--line);background:var(--surface);padding:14px}.auth-card h2{margin:0;font-size:20px}.auth-card small{color:var(--muted)}.auth-form{margin-top:10px;display:grid;grid-template-columns:1fr auto;gap:8px}.auth-form input{border:1px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit}.auth-form button{border:0;border-radius:12px;background:linear-gradient(120deg,var(--accent),#3b8ef1);color:#fff;font-weight:700;padding:10px 14px;cursor:pointer}.auth-form button:disabled{opacity:.65;cursor:default}.auth-row{margin-top:12px;display:flex;justify-content:space-between;align-items:center;gap:10px}.user-pill{background:#ffffffbd;border:1px solid var(--line);border-radius:999px;padding:8px 12px;font-size:13px}.logout-btn{border:1px solid var(--line);background:#fff;color:var(--text);border-radius:999px;padding:8px 12px;font:inherit;font-weight:700;cursor:pointer}.lang-switch{background:var(--surface);border:1px solid var(--line);padding:4px;border-radius:999px;display:flex;gap:6px}.lang-switch button{border:none;background:transparent;color:var(--muted);border-radius:999px;padding:6px 12px;font-weight:700;cursor:pointer}.lang-switch button.active{background:var(--accent);color:#fff}.subjects{margin-top:18px;display:flex;gap:8px;overflow-x:auto;padding-bottom:6px}.subject{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;padding:9px 14px;white-space:nowrap;font-weight:600;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.subject:hover{transform:translateY(-1px)}.subject--active{border-color:var(--accent);box-shadow:0 0 0 4px var(--ring)}.lessons{margin-top:14px}.lessons__header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px;gap:12px}.lessons__header h2{margin:0;font-size:clamp(20px,3vw,26px)}.lessons__header span{color:var(--muted);font-size:13px}.lessons__grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}.lesson-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 10px 25px #132c4914;animation:card-in .38s ease both}.lesson-card__thumb{width:100%;height:140px;object-fit:cover;border-radius:12px;border:1px solid rgba(31,93,176,.2);margin-bottom:10px}.lesson-card__meta{display:flex;justify-content:flex-end}.lesson-card__meta span{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--accent-strong);font-weight:700}.lesson-card h3{margin:8px 0 6px;font-size:18px;line-height:1.25}.lesson-card p{margin:0 0 12px;color:var(--muted);font-size:14px;line-height:1.45}.lesson-actions{display:grid;grid-template-columns:1fr;gap:8px}.lesson-actions button{width:100%;border:none;border-radius:12px;padding:10px 12px;background:linear-gradient(120deg,var(--accent),#3b8ef1);color:#fff;font-weight:700;cursor:pointer}.lesson-actions button.ghost{background:#edf4ff;color:#184c8f;border:1px solid #c9dcf8}.lesson-actions button:hover{filter:brightness(1.03)}.state{margin-top:16px;border-radius:12px;background:#ffffffb8;border:1px solid var(--line);padding:14px;color:var(--muted)}.state--error{border-color:#dd351c73;color:#a33622}.video-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#08182db8;display:grid;place-items:center;padding:16px;z-index:50}.video-modal__panel{width:min(960px,100%);border-radius:16px;background:var(--surface-strong);border:1px solid rgba(20,62,120,.2);box-shadow:0 20px 50px #05162c6b;overflow:hidden}.video-modal__header{padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line)}.video-modal__header h3{margin:0;font-size:16px}.video-modal__close{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);color:#184c8f;background:#edf4ff;font-size:16px;line-height:1}.video-modal__body{padding:10px}.video-modal__player{width:100%;aspect-ratio:16 / 9;border:0;border-radius:10px;background:#000}@keyframes card-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 640px){.app{padding:14px 10px 24px}.hero{border-radius:20px;padding:16px 14px 12px}.toolbar{flex-direction:column;align-items:flex-start}.lesson-card h3{font-size:16px}.auth-form{grid-template-columns:1fr}.auth-row{flex-direction:column;align-items:flex-start}}