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#4a5a8c24}.level-badge{display:flex;align-items:center;gap:10px;margin-bottom:15px;padding:10px 12px;background:#f1f4ffd9;border:1px solid rgba(162,180,255,.35);border-radius:10px;width:fit-content}.level-emoji{font-size:1.5rem}.level-name{font-weight:600;color:#3f57a4;font-size:1.1rem}.progress-info{display:flex;justify-content:space-between;margin-bottom:10px;font-size:1.1rem;color:#333;font-weight:600}.progress-bar{height:18px;background:#e7ebff;border-radius:999px;overflow:hidden;position:relative;border:1px solid rgba(145,163,234,.35)}.progress-fill{height:100%;width:100%;background:linear-gradient(90deg,#39b47e,#60d394 45%,#8de969);transition:transform .38s cubic-bezier(.2,.9,.18,1);position:relative;overflow:hidden}.progress-fill:after{content:"";position:absolute;top:0;left:0;bottom:0;right:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}@keyframes 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10px 24px #6078e83d}.topic-icon{width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;transition:transform .22s ease;box-shadow:inset 0 -1px #0000001f}.topic-card:hover .topic-icon{transform:scale(1.08)}.topic-card span{font-size:.9rem;font-weight:700;color:#2b3759;text-align:center}@media (max-width: 768px){.topic-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}.topic-card{padding:15px 10px}.topic-icon{width:36px;height:36px}}.lesson-list{background:var(--card-bg);border:1px solid var(--card-border);border-radius:22px;padding:26px;margin-bottom:30px;box-shadow:var(--card-shadow)}.lesson-list-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px}.lesson-list h3{color:var(--text-primary);font-size:1.42rem;margin-bottom:4px}.lesson-list 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.3s}.lesson-card:hover:not(.locked){border-color:var(--accent-soft-border);transform:translate(4px);box-shadow:0 12px 20px #6078e82e}.lesson-card:hover:not(.locked):before{background:linear-gradient(180deg,var(--accent),#7d69be);width:6px}.lesson-card.current{border-color:var(--accent-soft-border);background:linear-gradient(135deg,#5c71dd26,#8168be26)}.lesson-card.current:before{background:linear-gradient(180deg,var(--accent),#7d69be);width:6px}.lesson-card.completed{border-color:#53bd869e}.lesson-card.completed:before{background:#3eb882}.lesson-card.locked{opacity:.5;cursor:not-allowed}.lesson-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:10px}.lesson-number{background:linear-gradient(135deg,var(--accent),#7c65c9);color:#fff;padding:5px 11px;border-radius:999px;font-size:.78rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase}.lesson-status{display:inline-flex;align-items:center;gap:8px}.lesson-status-pill{border-radius:999px;border:1px solid rgba(122,141,214,.42);padding:4px 8px;font-size:.74rem;font-weight:700;color:var(--text-body);background:#ffffff8f}.lesson-status-pill.current{border-color:#566de566;color:#4a61d0}.lesson-status-pill.completed{border-color:#4aaf8066;color:#2d8c5f}.lesson-status-pill.locked{border-color:#7c86aa66;color:#7a83a8}.lesson-content h4{color:var(--text-primary);font-size:1.12rem;margin-bottom:6px}.lesson-content p{color:var(--text-muted);font-size:.92rem;margin-bottom:10px}.lesson-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;gap:10px}.lesson-type{background:#7e92e229;border:1px solid rgba(126,146,226,.34);padding:4px 10px;border-radius:999px;font-size:.78rem;color:var(--text-body);text-transform:capitalize;font-weight:700}.lesson-difficulty{display:flex;gap:2px}@media (max-width: 720px){.lesson-list-header{flex-direction:column}.lesson-list-stats{justify-content:flex-start}.lesson-status-pill{display:none}}.tutor-chat-toggle{position:fixed;bottom:30px;right:30px;width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#7f65c7);color:#fff;border:none;font-size:1.8rem;cursor:pointer;box-shadow:0 12px 22px #18245652;transition:transform .2s ease,box-shadow .2s ease;z-index:1000}.tutor-chat-toggle:hover{transform:scale(1.05);box-shadow:0 16px 24px #18245661}.tutor-chat{position:fixed;bottom:100px;right:30px;width:350px;height:500px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:20px;box-shadow:var(--card-shadow);display:flex;flex-direction:column;z-index:999;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.chat-header{background:linear-gradient(135deg,var(--accent) 0%,#7f65c7 100%);color:#fff;padding:20px;border-radius:20px 20px 0 0;text-align:center}.chat-header h3{margin:0;font-size:1.3rem}.chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:15px}.message{display:flex;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.message-content{max-width:80%;padding:12px 16px;border-radius:15px;word-wrap:break-word}.message.user .message-content{background:var(--accent);color:#fff;border-bottom-right-radius:5px}.message.assistant .message-content{background:var(--card-bg-muted);border:1px solid var(--card-border);color:var(--text-body);border-bottom-left-radius:5px}.message-content.typing{animation:pulse 1.5s infinite}@keyframes pulse{0%,to{opacity:.6}50%{opacity:1}}.chat-input{display:flex;padding:15px;border-top:1px solid var(--card-border);gap:10px}.chat-input input{flex:1;padding:12px;border:1px solid var(--card-border);color:var(--text-body);background:var(--card-bg-muted);border-radius:20px;font-size:1rem;outline:none}.chat-input input:focus{border-color:var(--accent-soft-border)}.chat-input button{width:45px;height:45px;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:1.2rem;cursor:pointer;transition:all .2s ease}.chat-input button:hover:not(:disabled){filter:brightness(1.06)}.chat-input button:disabled{opacity:.5;cursor:not-allowed}@media (max-width: 768px){.tutor-chat{width:calc(100% - 40px);right:20px;left:20px}}.app{min-height:100vh;padding:24px;position:relative;overflow-x:hidden}.app:before{content:"";position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 20% 50%,rgba(255,255,255,.1) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(255,255,255,.1) 0%,transparent 50%);animation:float 20s ease-in-out infinite;pointer-events:none;z-index:0}@keyframes float{0%,to{transform:translate(0) rotate(0)}33%{transform:translate(30px,-30px) rotate(120deg)}66%{transform:translate(-20px,20px) rotate(240deg)}}.app-header{text-align:center;color:var(--hero-text);margin-bottom:28px;position:relative;z-index:1}.app-header h1{font-size:clamp(2.4rem,5vw,3.25rem);margin-bottom:6px;animation:slideDown .6s ease-out;text-shadow:var(--hero-text-shadow)}@keyframes slideDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}.app-header p{font-size:1.1rem;color:var(--hero-subtext);animation:fadeIn .8s ease-out .2s both}.build-meta{margin-top:14px;display:inline-flex;gap:8px}.build-meta span{background:var(--chip-bg);border:1px solid var(--chip-border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:999px;color:var(--hero-text);font-size:.85rem;padding:4px 11px;text-transform:uppercase;letter-spacing:.06em;font-weight:600}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.header-controls{margin-top:16px;display:inline-flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}.theme-toggle-btn{background:var(--chip-bg);color:var(--hero-text);border:1px solid var(--chip-border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:10px 16px;border-radius:999px;cursor:pointer;font-size:.92rem;font-weight:700;transition:all .2s ease;display:inline-flex;align-items:center;gap:8px}.theme-toggle-btn:hover{transform:translateY(-2px);background:var(--chip-hover-bg);box-shadow:0 8px 20px #08102733}.change-level-btn{background:var(--chip-bg);color:var(--hero-text);border:1px solid var(--chip-border);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:10px 18px;border-radius:999px;cursor:pointer;font-size:.98rem;font-weight:700;transition:all .2s ease;display:inline-flex;align-items:center;gap:8px}.change-level-btn:hover{background:var(--chip-hover-bg);transform:translateY(-2px);box-shadow:0 8px 20px #08102733}.app-main{max-width:960px;margin:0 auto;position:relative;z-index:1}.no-lessons{background:var(--card-bg);border:1px solid var(--card-border);border-radius:20px;padding:60px 40px;text-align:center;box-shadow:var(--card-shadow)}.no-lessons p{color:var(--text-muted);font-size:1.2rem;margin-top:20px}.back-to-list-btn{background:var(--card-bg);color:var(--accent);border:1px solid var(--accent-soft-border);padding:11px 20px;border-radius:999px;cursor:pointer;font-size:.95rem;font-weight:700;margin-bottom:20px;display:inline-flex;align-items:center;gap:8px;transition:all .2s ease;box-shadow:0 8px 16px #4860b72e}.back-to-list-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent);transform:translateY(-2px) scale(1.01);box-shadow:0 14px 22px #4860b747}@media (max-width: 640px){.theme-toggle-btn span{display:none}}*{margin:0;padding:0;box-sizing:border-box}:root{--bg-start: #f2f6ff;--bg-mid: #e7efff;--bg-end: #dce7ff;--bg-glow-a: rgba(86, 136, 255, .2);--bg-glow-b: rgba(255, 154, 190, .18);--text-primary: #17264f;--text-body: #2d3d64;--text-muted: #6d7ba4;--hero-text: #18264d;--hero-subtext: #374c7f;--hero-text-shadow: 0 10px 20px rgba(157, 181, 255, .18);--accent: #546de5;--accent-soft-border: #90a3ff;--chip-bg: rgba(255, 255, 255, .72);--chip-border: rgba(84, 109, 229, .34);--chip-hover-bg: rgba(255, 255, 255, .92);--card-bg: rgba(255, 255, 255, .95);--card-bg-muted: rgba(247, 250, 255, .95);--card-border: rgba(156, 175, 242, .34);--card-shadow: 0 20px 30px rgba(67, 91, 158, .16)}:root[data-theme=dark]{--bg-start: #0e162f;--bg-mid: #1a2d5a;--bg-end: #273d7d;--bg-glow-a: rgba(105, 156, 255, .18);--bg-glow-b: rgba(255, 124, 176, .16);--text-primary: #ecf2ff;--text-body: #dde6ff;--text-muted: #9fb1df;--hero-text: #f4f8ff;--hero-subtext: #dce5ff;--hero-text-shadow: 0 12px 26px rgba(5, 10, 30, .55);--accent: #8ea5ff;--accent-soft-border: #6f86dd;--chip-bg: rgba(17, 31, 66, .56);--chip-border: rgba(162, 183, 255, .42);--chip-hover-bg: rgba(23, 40, 82, .78);--card-bg: rgba(15, 27, 56, .86);--card-bg-muted: rgba(22, 37, 74, .84);--card-border: rgba(125, 149, 225, .34);--card-shadow: 0 24px 40px rgba(5, 10, 30, .38)}body{font-family:DM Sans,sans-serif;background:radial-gradient(circle at 16% 22%,var(--bg-glow-a),transparent 34%),radial-gradient(circle at 86% 18%,var(--bg-glow-b),transparent 32%),linear-gradient(135deg,var(--bg-start) 0%,var(--bg-mid) 45%,var(--bg-end) 100%);color:var(--text-body);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#root{min-height:100vh}h1,h2,h3,h4{font-family:Space Grotesk,sans-serif;letter-spacing:.01em}button,input{font:inherit}::selection{background:#90a7ff66}