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.lesson-title{color:var(--primary)}.lesson-subtitle{font-size:.75rem;color:var(--text-light)}.lesson-check{font-size:.75rem;padding:4px 8px;border-radius:9999px;background:rgba(34,197,94,.12);color:#16a34a;font-weight:600}.sidebar-footer{position:absolute;bottom:0;left:0;right:0;padding:16px;background:var(--card);border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.user-info{display:flex;flex-direction:column;gap:2px}.username{font-weight:500;font-size:.875rem}.expire{font-size:.75rem;color:var(--text-light)}.logout-btn{display:flex;align-items:center;gap:4px;padding:8px 12px;background:#fef2f2;color:var(--error);border:none;border-radius:6px;font-size:.75rem;font-weight:500;cursor:pointer;transition:all .2s}.logout-btn:hover{background:#fee2e2}.main-content{flex:1;display:flex;flex-direction:column;width:100%;max-width:100%;margin:0 auto;padding:16px 16px 100px;padding-bottom:calc(100px + 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640px){.reading-text{font-size:1.5rem;line-height:1.9}}@media (min-width: 640px) and (max-width: 1024px){.reading-text{line-height:1.8}}.sentence{cursor:pointer;transition:all .2s;border-radius:3px;padding:2px 4px}.sentence:hover{color:var(--primary);background:rgba(14,165,233,.1)}.sentence.playing{background:#bae6fd;color:#0284c7}.section-tag{display:inline-block;padding:6px 14px;border-radius:9999px;font-size:.9rem;font-weight:600;color:#fff}.section-tag.orange{background:var(--orange)}.section-tag.yellow{background:var(--yellow)}.translation-section{margin-bottom:24px}.translation-text{font-size:1.25rem;line-height:1.8;color:var(--text)}@media (max-width: 480px){.translation-text,.reading-text{font-size:1rem}.lesson-header h1,.lesson-header p{font-size:1.4rem}}.translation-text span.translation-highlight{background:#bae6fd!important;color:#0284c7!important;font-weight:500!important;padding:2px 4px!important;border-radius:3px!important;display:inline-block!important;transition:all .2s}.vocab-section{margin-bottom:24px}.vocab-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 16px}@media (max-width: 400px){.vocab-grid{grid-template-columns:1fr}}.vocab-item{display:flex;align-items:flex-start;gap:6px;padding:8px 40px 8px 0;font-size:1.25rem;width:100%;box-sizing:border-box;border-bottom:1px dashed rgba(148,163,184,.6);position:relative}.vocab-item.vocab-playing{background:#e0f2fe;border-radius:6px;padding:8px 40px 8px 8px}.vocab-text-wrapper{display:block;flex:1;min-width:0;max-width:100%;line-height:1.6;word-wrap:break-word;overflow-wrap:break-word}.vocab-word{font-weight:600;color:var(--text);word-break:break-word;margin-right:6px}.vocab-phonetic{font-family:Times New Roman,serif;font-size:1.25rem;color:var(--text-light);word-break:break-word;margin-right:6px}.vocab-mean{color:var(--text);font-size:1.25rem;word-break:break-word}@media (max-width: 480px){.vocab-item{font-size:.9rem;display:flex;align-items:flex-start;padding:8px 32px 8px 0;position:relative}.vocab-text-wrapper{display:block;max-width:100%;line-height:1.5}.vocab-word{font-size:.9rem;margin-right:4px}.vocab-phonetic{font-size:.85rem;margin-right:4px}.vocab-mean{font-size:.85rem;color:var(--text-light);word-break:break-word}.play-btn{width:24px;height:24px;position:absolute;right:0;top:50%;transform:translateY(-50%);margin-left:0}}@media (min-width: 481px) and (max-width: 1024px){.vocab-item{padding-right:44px}.vocab-text-wrapper{max-width:100%}}.vocab-section{margin-bottom:120px}.play-btn{width:28px;height:28px;border-radius:9999px;border:none;display:flex;align-items:center;justify-content:center;background:rgba(37,99,235,.06);color:#2563eb;cursor:pointer;transition:all .15s ease;position:absolute;right:0;top:50%;transform:translateY(-50%)}.play-btn:hover{background:rgba(37,99,235,.15)}.center-play{display:none}.bottom-nav-container{position:fixed;bottom:48px;bottom:calc(48px + env(safe-area-inset-bottom,0px));left:0;right:0;display:flex;justify-content:center;pointer-events:none;z-index:9990;transform:translateZ(0);-webkit-transform:translateZ(0)}.bottom-nav-glass{pointer-events:auto;background:rgba(255,255,255,.5);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);box-shadow:0 8px 32px rgba(0,0,0,.1);border-radius:9999px;padding:8px;display:flex;align-items:center;gap:16px;border:1px solid rgba(255,255,255,.5)}.nav-icon-btn{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:none;background:transparent;cursor:pointer;transition:all .2s;color:#475569}.nav-icon-btn:hover:not(:disabled){background:rgba(241,245,249,.5)}.nav-icon-btn:disabled{color:#cbd5e1;cursor:not-allowed}.nav-lesson-info{padding:0 8px;display:flex;flex-direction:column;align-items:center;min-width:100px}.nav-label{font-size:.75rem;color:#64748b;text-transform:uppercase;font-weight:700;letter-spacing:.05em}.nav-value{font-size:1.125rem;font-weight:700;color:#1e293b;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.nav-next-btn{height:40px;padding:0 16px;border-radius:9999px;display:flex;align-items:center;justify-content:center;gap:4px;border:none;font-weight:700;font-size:.875rem;cursor:pointer;transition:all .2s;background:linear-gradient(to right,#3b82f6,#2563eb);color:#fff;box-shadow:0 4px 6px -1px rgba(59,130,246,.5)}.nav-next-btn:active{transform:scale(.95)}.nav-next-btn:disabled{background:rgba(241,245,249,.5);color:#cbd5e1;box-shadow:none;cursor:not-allowed}.footer,.nav-bar-wrapper{display:none}.toolbar{display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;z-index:40;background:rgba(248,250,252,.9);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);margin:-16px -16px 20px;padding:12px 16px;border-bottom:1px solid rgba(0,0,0,.03);transition:all .3s ease}@media (min-width: 768px){.toolbar{margin-top:-24px;margin-left:-24px;margin-right:-24px;padding:16px 24px}}.menu-btn{display:flex;align-items:center;gap:6px;background:none;border:none;cursor:pointer;font-weight:600;font-size:1rem;color:var(--text-dark);padding:8px;border-radius:8px;transition:background .2s}.menu-btn:hover{background:rgba(124,58,237,.1)}.menu-icon-wrapper{padding:6px;background:rgba(124,58,237,.1);border-radius:6px;color:var(--primary);display:flex;align-items:center;justify-content:center}.rate-control{display:flex;align-items:center;gap:8px}.rate-label{font-size:.75rem;color:var(--text-light);display:none}@media (min-width: 480px){.rate-label{display:inline}}.rate-control select{padding:6px 10px;background:white;border:1px solid var(--border);border-radius:6px;font-size:.8125rem;color:var(--text);cursor:pointer}.rate-control select:focus{outline:none;border-color:var(--primary)}.icon{width:20px;height:20px}.icon-small{width:16px;height:16px}.icon-tiny{width:12px;height:12px}.icon-btn{padding:4px;background:none;border:none;border-radius:50%;cursor:pointer;color:var(--primary);transition:all .2s}.icon-btn:hover{background:rgba(124,58,237,.1)}.loading-page,.error-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--text-light);background:var(--bg-purple)}.spinner{width:40px;height:40px;border:3px solid rgba(124,58,237,.2);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.error-page button{padding:10px 20px;background:var(--primary);color:#fff;border:none;border-radius:8px;cursor:pointer}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:9999;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:white;border-radius:16px;padding:32px;max-width:400px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.3);animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.session-expired-modal{text-align:center}.modal-icon{font-size:3rem;margin-bottom:16px}.session-expired-modal h2{font-size:1.5rem;color:var(--text-dark);margin-bottom:12px}.session-expired-modal p{font-size:1rem;color:var(--text);margin-bottom:8px;line-height:1.6}.modal-hint{font-size:.875rem;color:var(--text-light);font-style:italic}