:root{--bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0284c7 100%);--card-bg: rgba(255, 255, 255, .07);--card-border: rgba(255, 255, 255, .18);--card-glow: rgba(56, 189, 248, .25);--text-main: #f8fafc;--text-muted: #94a3b8;--accent-gold: #f59e0b;--accent-cyan: #38bdf8;--accent-emerald: #10b981;--accent-purple: #a855f7;--accent-rose: #f43f5e;--accent-orange: #f97316;--accent-indigo: #6366f1;--accent-teal: #14b8a6;--shadow-main: 0 20px 50px rgba(0, 0, 0, .4);--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif}*{box-sizing:border-box;margin:0;padding:0;-webkit-user-select:none;user-select:none}body{font-family:var(--font-family);background:radial-gradient(circle at top center,#1e1b4b,#0f172a 60%,#020617);color:var(--text-main);min-height:100vh;display:flex;align-items:center;justify-content:center;overflow-x:hidden;padding:20px 0}#root{width:100%;min-height:100vh;display:flex;align-items:center;justify-content:center}.h5-frame{width:100%;max-width:440px;min-height:800px;background:#0f172ac7;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:2px solid rgba(255,255,255,.15);border-radius:40px;box-shadow:0 25px 60px #0009,0 0 40px #38bdf826;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:20px 18px;position:relative;overflow:hidden}.h5-notch{width:120px;height:18px;background:#0006;border-bottom-left-radius:12px;border-bottom-right-radius:12px;position:absolute;top:0;left:50%;transform:translate(-50%);border-bottom:1px solid rgba(255,255,255,.08);z-index:10}.app-header{text-align:center;margin-top:10px;margin-bottom:12px;width:100%}.app-title{font-size:1.7rem;font-weight:700;letter-spacing:.5px;background:linear-gradient(90deg,#38bdf8,#f59e0b);-webkit-background-clip:text;-webkit-text-fill-color:transparent;display:flex;align-items:center;justify-content:center;gap:8px}.app-subtitle{font-size:.88rem;color:var(--text-muted);margin-top:4px}.nav-container{display:flex;flex-direction:column;gap:8px;width:100%;margin-top:12px}.quick-nav{display:flex;align-items:center;justify-content:flex-start;gap:6px;width:100%;background:#ffffff0d;padding:5px 6px;border-radius:16px;border:1px solid rgba(255,255,255,.08);overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch;-ms-overflow-style:none;scrollbar-width:none;cursor:grab}.quick-nav.grabbing{cursor:grabbing}.quick-nav.grabbing *{cursor:grabbing!important}.quick-nav::-webkit-scrollbar{display:none}.nav-container .top-nav{margin-top:0}.top-nav{display:flex;align-items:center;justify-content:flex-start;gap:6px;width:100%;margin-top:12px;background:#ffffff0d;padding:5px 6px;border-radius:16px;border:1px solid rgba(255,255,255,.08);overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch;-ms-overflow-style:none;scrollbar-width:none;cursor:grab}.top-nav.grabbing{cursor:grabbing}.top-nav.grabbing *{cursor:grabbing!important}.top-nav::-webkit-scrollbar{display:none}.nav-tab{flex:0 0 auto;padding:8px 12px;border:none;background:transparent;color:var(--text-muted);font-size:.85rem;font-weight:600;border-radius:12px;cursor:pointer;transition:all .25s ease;display:flex;align-items:center;justify-content:center;gap:4px}.nav-tab:hover{color:#fff;background:#ffffff14}.nav-tab.active{background:linear-gradient(135deg,#0284c7,#38bdf8);color:#0f172a;font-weight:700;box-shadow:0 4px 14px #38bdf859}.main-container{display:flex;flex-direction:column;align-items:center;width:100%;flex:1}.view-section{width:100%;display:flex;flex-direction:column;align-items:center;gap:16px;transition:opacity .3s ease,transform .3s ease}.view-section.hidden{display:none!important}.home-portal{padding-top:8px;gap:18px}.portal-welcome{text-align:center}.welcome-tag{display:inline-block;font-size:.75rem;font-weight:700;color:var(--accent-cyan);background:#38bdf81f;border:1px solid rgba(56,189,248,.25);padding:4px 12px;border-radius:20px;margin-bottom:6px}.portal-welcome h2{font-size:1.35rem;font-weight:700;color:#fff}.portal-welcome p{font-size:.85rem;color:var(--text-muted);margin-top:4px}.chapter-cards-container{width:100%;display:flex;flex-direction:column;gap:16px}.chapter-card{width:100%;background:linear-gradient(135deg,#ffffff14,#ffffff08);border:1px solid var(--card-border);border-radius:24px;padding:18px;cursor:pointer;position:relative;overflow:hidden;transition:all .3s cubic-bezier(.34,1.56,.64,1);display:flex;flex-direction:column;gap:12px}.chapter-card:hover{transform:translateY(-4px) scale(1.01);border-color:var(--accent-cyan);box-shadow:0 15px 35px #38bdf833}.chapter-card.ch2:hover{border-color:var(--accent-gold);box-shadow:0 15px 35px #f59e0b33}.chapter-card.ch3:hover{border-color:var(--accent-emerald);box-shadow:0 15px 35px #10b98133}.chapter-card.ch4:hover{border-color:var(--accent-purple);box-shadow:0 15px 35px #a855f733}.chapter-card.ch5:hover{border-color:var(--accent-orange);box-shadow:0 15px 35px #f9731633}.chapter-card.ch6:hover{border-color:var(--accent-rose);box-shadow:0 15px 35px #f43f5e33}.chapter-card.ch7:hover{border-color:var(--accent-indigo);box-shadow:0 15px 35px #6366f133}.chapter-card.ch8:hover{border-color:var(--accent-teal);box-shadow:0 15px 35px #14b8a633}.chapter-card-top{display:flex;align-items:center;justify-content:space-between}.chapter-badge{font-size:.78rem;font-weight:700;padding:4px 12px;border-radius:12px;letter-spacing:.5px}.chapter-card.ch1 .chapter-badge{background:#38bdf826;color:var(--accent-cyan);border:1px solid rgba(56,189,248,.3)}.chapter-card.ch2 .chapter-badge{background:#f59e0b26;color:var(--accent-gold);border:1px solid rgba(245,158,11,.3)}.chapter-card.ch3 .chapter-badge{background:#10b98126;color:var(--accent-emerald);border:1px solid rgba(16,185,129,.3)}.chapter-card.ch4 .chapter-badge{background:#a855f726;color:var(--accent-purple);border:1px solid rgba(168,85,247,.3)}.chapter-card.ch5 .chapter-badge{background:#f9731626;color:var(--accent-orange);border:1px solid rgba(249,115,22,.3)}.chapter-card.ch6 .chapter-badge{background:#f43f5e26;color:var(--accent-rose);border:1px solid rgba(244,63,94,.3)}.chapter-card.ch7 .chapter-badge{background:#6366f126;color:var(--accent-indigo);border:1px solid rgba(99,102,241,.3)}.chapter-card.ch8 .chapter-badge{background:#14b8a626;color:var(--accent-teal);border:1px solid rgba(20,184,166,.3)}.chapter-count{font-size:.8rem;color:var(--text-muted)}.chapter-info h3{font-size:1.25rem;font-weight:700;color:#fff;margin-bottom:4px;display:flex;align-items:center;gap:8px}.chapter-info p{font-size:.85rem;color:var(--text-muted);line-height:1.4}.chapter-features{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}.feature-pill{font-size:.72rem;background:#ffffff0f;border:1px solid rgba(255,255,255,.1);color:#cbd5e1;padding:3px 8px;border-radius:8px}.chapter-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:4px;padding-top:10px;border-top:1px solid rgba(255,255,255,.08)}.start-btn{border:none;padding:8px 18px;border-radius:14px;font-size:.88rem;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:6px;transition:all .2s ease}.chapter-card.ch1 .start-btn{background:linear-gradient(135deg,#0284c7,#38bdf8);color:#0f172a}.chapter-card.ch2 .start-btn{background:linear-gradient(135deg,#d97706,#f59e0b);color:#0f172a}.chapter-card.ch3 .start-btn{background:linear-gradient(135deg,#059669,#10b981);color:#0f172a}.chapter-card.ch4 .start-btn{background:linear-gradient(135deg,#7c3aed,#a855f7);color:#fff}.chapter-card.ch5 .start-btn{background:linear-gradient(135deg,#ea580c,#f97316);color:#fff}.chapter-card.ch6 .start-btn{background:linear-gradient(135deg,#e11d48,#f43f5e);color:#fff}.chapter-card.ch7 .start-btn{background:linear-gradient(135deg,#4f46e5,#6366f1);color:#fff}.chapter-card.ch8 .start-btn{background:linear-gradient(135deg,#0d9488,#14b8a6);color:#fff}.chapter-card:hover .start-btn{transform:translate(4px)}.app-highlights{width:100%;background:#0f172a66;border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:14px;display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.highlight-item{display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--text-muted)}.highlight-icon{width:28px;height:28px;border-radius:8px;background:#38bdf81f;color:var(--accent-cyan);display:flex;align-items:center;justify-content:center;font-weight:700}.card-stage{perspective:1000px;width:100%;height:390px;position:relative}.flashcard{width:100%;height:100%;background:var(--card-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--card-border);border-radius:28px;box-shadow:var(--shadow-main);display:flex;flex-direction:column;align-items:center;justify-content:space-between;position:relative;transition:transform .4s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease,border-color .3s ease;cursor:pointer;overflow:hidden;padding:64px 20px 20px;box-sizing:border-box}.flashcard:hover{transform:translateY(-4px) scale(1.01);border-color:#38bdf866;box-shadow:0 25px 60px #38bdf833}.flashcard.pop-anim{animation:cardPop .35s ease-out}@keyframes cardPop{0%{transform:scale(.92);opacity:.5}60%{transform:scale(1.03);opacity:1}to{transform:scale(1)}}.progress-bar-container{position:absolute;top:0;left:0;width:100%;height:6px;background:#ffffff14}.progress-bar-fill{height:100%;width:0%;background:linear-gradient(90deg,#0284c7,#38bdf8,#f59e0b);border-radius:0 4px 4px 0;transition:width .1s linear}.card-top-bar{position:absolute;top:14px;left:16px;right:16px;display:flex;align-items:center;justify-content:space-between}.card-number{font-size:.8rem;font-weight:600;color:var(--accent-cyan);background:#38bdf81f;padding:4px 10px;border-radius:10px;border:1px solid rgba(56,189,248,.2)}.category-tag{font-size:.78rem;font-weight:700;color:var(--accent-gold);background:#f59e0b1f;padding:4px 10px;border-radius:10px;border:1px solid rgba(245,158,11,.25)}.audio-btn{width:40px;height:40px;border-radius:50%;border:none;background:#ffffff1a;color:#fff;font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.audio-btn:hover{background:var(--accent-cyan);color:#0f172a;transform:scale(1.1)}.audio-btn.playing{animation:pulseAudio .6s infinite alternate}@keyframes pulseAudio{0%{transform:scale(1);box-shadow:0 0 #38bdf866}to{transform:scale(1.15);box-shadow:0 0 15px #38bdf8cc}}.card-main-content{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;width:100%;gap:12px}.item-main{font-size:3.5rem;font-weight:800;line-height:1.15;background:linear-gradient(180deg,#fff 30%,#cbd5e1);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-top:0;text-align:center;word-break:break-word}.item-main.small-font{font-size:2.4rem}.item-main.tiny-font{font-size:1.8rem}.item-main.phrase-font{font-size:1.3rem;line-height:1.25;padding:0 10px}.item-word{font-size:1.25rem;font-weight:700;color:#f8fafc;margin-top:2px;text-align:center;word-break:break-word}.item-word.small-word{font-size:1.1rem;line-height:1.35}.word-cn{display:inline-block;font-weight:700;color:#f8fafc}.word-en{display:block;font-size:.9rem;color:var(--text-muted);font-weight:500;margin-top:4px}.phonetic-container{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:4px;flex-wrap:wrap}.phonetic-tag{font-size:.9rem;font-weight:600;color:var(--accent-gold);background:#f59e0b14;border:1px solid rgba(245,158,11,.25);padding:3px 12px;border-radius:8px;letter-spacing:.5px}.phonetic-cn{font-size:.85rem;color:var(--text-muted);font-weight:400}.rule-note{font-size:.85rem;color:#cbd5e1;background:#ffffff09;border:1px solid rgba(255,255,255,.08);padding:10px 14px;border-radius:14px;margin-top:12px;text-align:left;width:100%;max-width:100%;box-sizing:border-box}.note-sentence-box{display:flex;flex-direction:column;gap:3px;margin-bottom:6px}.sentence-pt{font-size:.9rem;font-weight:600;color:var(--accent-cyan);line-height:1.4}.sentence-cn{font-size:.8rem;color:#cbd5e1;opacity:.85}.note-desc{font-size:.76rem;color:var(--text-muted);border-top:1px dashed rgba(255,255,255,.08);padding-top:6px;margin-top:6px;line-height:1.35}.note-desc.no-border{border-top:none;padding-top:0;margin-top:0}.controls-panel{width:100%;background:#0f172a99;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:14px 16px;display:flex;flex-direction:column;gap:12px;box-shadow:0 10px 30px #0000004d}.primary-controls{display:flex;align-items:center;justify-content:center;gap:12px}.ctrl-btn{border:none;background:#ffffff14;color:#fff;border-radius:14px;padding:10px 16px;font-size:.95rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;transition:all .2s ease;border:1px solid rgba(255,255,255,.1)}.ctrl-btn:hover{background:#ffffff2e;transform:translateY(-2px)}.ctrl-btn.play-btn{background:linear-gradient(135deg,#0284c7,#38bdf8);color:#0f172a;font-size:1.05rem;padding:10px 24px;border-radius:18px;border:none;box-shadow:0 6px 16px #38bdf84d}.ctrl-btn.play-btn:hover{transform:translateY(-2px) scale(1.04);box-shadow:0 10px 22px #38bdf866}.ctrl-btn.play-btn.active{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;box-shadow:0 6px 16px #f59e0b4d}.secondary-controls{display:flex;align-items:center;justify-content:space-around;flex-wrap:nowrap;gap:8px;padding-top:10px;border-top:1px solid rgba(255,255,255,.08)}.setting-group{display:flex;align-items:center;gap:6px;font-size:.82rem;color:var(--text-muted)}.setting-group label{font-weight:500}.select-input{background:#ffffff1a;border:1px solid rgba(255,255,255,.15);color:#fff;padding:4px 8px;border-radius:8px;font-size:.82rem;outline:none;cursor:pointer}.select-input option{background:#1e1b4b;color:#fff}.toggle-label{display:flex;align-items:center;gap:6px;cursor:pointer}.toggle-switch{position:relative;width:38px;height:20px;background:#ffffff26;border-radius:10px;transition:background .3s ease}.toggle-switch:after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;background:#fff;border-radius:50%;transition:transform .3s ease}input[type=checkbox]:checked~.toggle-switch,.toggle-switch.checked{background:var(--accent-cyan)}input[type=checkbox]:checked~.toggle-switch:after,.toggle-switch.checked:after{transform:translate(18px)}.controls-panel.dialogue-controls{padding:8px 12px;gap:0;border-radius:18px;background:#0f172abf;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 6px 20px #00000059;margin-top:4px}.compact-row-controls{display:flex;align-items:center;justify-content:space-between;width:100%;gap:6px;flex-wrap:nowrap}.compact-btn-group{display:flex;align-items:center;gap:4px;flex-shrink:0}.compact-btn{padding:5px 8px;font-size:.82rem;border-radius:10px;gap:4px;height:32px}.compact-play-btn{padding:5px 12px!important;font-size:.85rem!important;border-radius:12px!important;height:32px;gap:4px}.compact-divider{width:1px;height:18px;background:#ffffff1f;margin:0 2px;flex-shrink:0}.compact-settings-group{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-shrink:0}.compact-setting{gap:4px;font-size:.8rem}.compact-label{font-size:.85rem;display:flex;align-items:center}.compact-select{padding:2px 6px;font-size:.78rem;border-radius:6px;height:26px;background:#ffffff14}.compact-toggle-label{gap:4px}.compact-switch{width:30px;height:16px;border-radius:8px}.compact-switch:after{width:12px;height:12px;top:2px;left:2px}input[type=checkbox]:checked~.compact-switch:after,.compact-switch.checked:after{transform:translate(14px)}.grid-strip-container{width:100%;margin-top:4px}.grid-title{font-size:.78rem;color:var(--text-muted);margin-bottom:6px;text-align:center}.grid-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:5px;background:#0f172a66;padding:8px;border-radius:14px;border:1px solid rgba(255,255,255,.08);max-height:110px;overflow-y:auto}.grid-strip::-webkit-scrollbar{width:4px}.grid-strip::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.grid-item{min-width:32px;height:32px;padding:0 6px;border-radius:8px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08);color:var(--text-main);font-size:.82rem;font-weight:600;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease}.grid-item:hover{background:#38bdf833;border-color:var(--accent-cyan);transform:translateY(-2px)}.grid-item.active{background:var(--accent-gold);color:#0f172a;font-weight:800;border-color:var(--accent-gold);box-shadow:0 4px 10px #f59e0b66}@media (max-width: 500px){body{padding:0;align-items:stretch}#root{align-items:stretch}.h5-frame{border-radius:0;border:none;box-shadow:none;min-height:100vh;max-width:100%;padding:12px 10px}.h5-notch{display:none}.card-stage{height:350px}.flashcard{height:100%;padding:56px 14px 14px}.card-main-content{gap:8px}.item-main{font-size:2.8rem}.item-main.small-font{font-size:2rem}.item-main.tiny-font{font-size:1.5rem}.item-main.phrase-font{font-size:1.15rem}.item-word{font-size:1.1rem}.word-en{font-size:.82rem;margin-top:2px}.phonetic-tag{font-size:.8rem;padding:2px 8px}.phonetic-cn{font-size:.76rem}.rule-note{font-size:.78rem;padding:8px 10px;margin-top:8px;border-radius:10px}.sentence-pt{font-size:.82rem}.sentence-cn{font-size:.74rem}.note-desc{font-size:.7rem;padding-top:4px;margin-top:4px}.chat-container{max-height:calc(100vh - 165px);gap:12px;padding:8px 6px}.controls-panel.dialogue-controls{padding:6px 8px;border-radius:14px}.compact-btn{padding:4px 6px;font-size:.76rem;height:30px}.compact-play-btn{padding:4px 10px!important;font-size:.78rem!important;height:30px}.compact-settings-group{gap:5px}.compact-select{padding:2px 4px;font-size:.74rem;height:24px}.compact-switch{width:28px;height:15px}.compact-switch:after{width:11px;height:11px}input[type=checkbox]:checked~.compact-switch:after,.compact-switch.checked:after{transform:translate(13px)}}.hidden{display:none!important}.app-header.study-mode{cursor:pointer;position:relative;transition:transform .2s ease,opacity .2s ease}.app-header.study-mode:hover{transform:scale(1.02);opacity:.95}.app-header.study-mode:after{display:block;font-size:.72rem;color:var(--accent-cyan);margin-top:6px;font-weight:600;opacity:.8;animation:pulse-hint 1.5s infinite alternate}@keyframes pulse-hint{0%{opacity:.4;transform:scale(.98)}to{opacity:.9;transform:scale(1.02)}}.block-card{display:flex;align-items:center;gap:16px;background:#ffffff0d;border:1px solid rgba(255,255,255,.08);border-radius:20px;padding:16px;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 12px #00000026}.block-card:hover{transform:translateY(-2px);background:#ffffff17}.block-card.basics-theme:hover{border-color:var(--accent-cyan);box-shadow:0 8px 24px #38bdf833}.block-card.dialogues-theme:hover{border-color:var(--accent-gold);box-shadow:0 8px 24px #f59e0b33}.block-card.readings-theme:hover{border-color:var(--accent-purple);box-shadow:0 8px 24px #a855f733}.block-card.quiz-theme:hover{border-color:var(--accent-emerald);box-shadow:0 8px 24px #10b98133}.block-card-icon{font-size:2.2rem;width:50px;height:50px;display:flex;align-items:center;justify-content:center;background:#ffffff0a;border-radius:14px}.block-card-content{flex:1}.block-card-content h3{font-size:1.05rem;font-weight:700;color:#fff}.block-card-content p{font-size:.76rem;color:var(--text-muted);margin-top:3px;line-height:1.35}.block-card-footer-info{display:flex;align-items:center;justify-content:space-between;margin-top:8px}.block-count-pill{font-size:.7rem;background:#ffffff14;color:var(--text-main);padding:2px 8px;border-radius:6px;font-weight:500}.block-arrow{font-size:.76rem;color:var(--accent-cyan);font-weight:600}.block-card.basics-theme .block-arrow{color:var(--accent-cyan)}.block-card.dialogues-theme .block-arrow{color:var(--accent-gold)}.block-card.readings-theme .block-arrow{color:var(--accent-purple)}.block-card.quiz-theme .block-arrow{color:var(--accent-emerald)}.reading-paragraph-card{background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:14px 16px;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 10px #0000001a}.reading-paragraph-card:hover{background:#ffffff14;border-color:#fff3}.reading-paragraph-card.playing-highlight{background:#a855f714;border-color:var(--accent-purple);box-shadow:0 0 15px #a855f726}.paragraph-num-badge{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;background:#ffffff14;border-radius:50%;font-size:.72rem;color:var(--text-muted);font-weight:700;margin-top:2px}.reading-pt-text{font-size:.92rem;color:#fff;font-weight:600;line-height:1.45}.reading-cn-text{font-size:.8rem;color:var(--text-muted);margin-top:5px;line-height:1.4}.reading-audio-indicator-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center}.reading-paragraph-card.playing-highlight .reading-audio-indicator-btn{color:var(--accent-purple)}.wave-animation{display:flex;align-items:flex-end;gap:2px;height:14px;padding-bottom:2px}.wave-animation span{display:block;width:2px;height:100%;background:var(--accent-purple);border-radius:1px;animation:bounce-wave .8s ease-in-out infinite alternate}.wave-animation span:nth-child(2){animation-delay:.15s}.wave-animation span:nth-child(3){animation-delay:.3s}@keyframes bounce-wave{0%{height:4px}to{height:12px}}.chat-container{display:flex;flex-direction:column;width:100%;flex:1;max-height:560px;overflow-y:auto;padding:10px 12px;gap:14px;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;-ms-overflow-style:none;scrollbar-width:none}.chat-container::-webkit-scrollbar{display:none;width:0;height:0}.chat-row{display:flex;width:100%;align-items:flex-start;gap:10px;transition:all .3s cubic-bezier(.4,0,.2,1)}.chat-row.right{flex-direction:row-reverse}.chat-row.inactive-row{opacity:.58;filter:brightness(.92)}.chat-row.inactive-row:hover{opacity:.92;filter:brightness(1)}.chat-row.active-row{opacity:1;filter:none;z-index:2}.chat-avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.92rem;flex-shrink:0;box-shadow:0 3px 8px #0000004d;transition:all .3s cubic-bezier(.4,0,.2,1)}.chat-avatar.avatar-a{background:linear-gradient(135deg,#10b981,#059669);color:#fff;border:1.5px solid rgba(16,185,129,.4)}.chat-avatar.avatar-b{background:linear-gradient(135deg,#38bdf8,#0284c7);color:#fff;border:1.5px solid rgba(56,189,248,.4)}.chat-avatar.active-avatar{transform:scale(1.12)}.chat-avatar.avatar-a.active-avatar{box-shadow:0 0 16px #10b981bf,0 4px 12px #00000059;border-color:#34d399;animation:avatar-pulse-a 2.2s infinite ease-in-out}.chat-avatar.avatar-b.active-avatar{box-shadow:0 0 16px #38bdf8bf,0 4px 12px #00000059;border-color:#7dd3fc;animation:avatar-pulse-b 2.2s infinite ease-in-out}.chat-bubble-wrapper{display:flex;flex-direction:column;max-width:calc(100% - 48px)}.chat-row.right .chat-bubble-wrapper{align-items:flex-end}.chat-speaker-info{display:flex;align-items:center;gap:6px;margin-bottom:4px;font-size:.72rem;padding:0 2px}.chat-row.right .chat-speaker-info{flex-direction:row-reverse}.chat-speaker-label{font-weight:600;color:#94a3b8}.chat-seq-pill{background:#ffffff14;padding:1px 6px;border-radius:8px;font-size:.68rem;color:#94a3b8;font-family:monospace}.chat-status-badge{display:inline-flex;align-items:center;gap:4px;padding:1px 7px;border-radius:10px;font-size:.68rem;font-weight:600}.chat-row.right .chat-status-badge{background:#10b98133;color:#34d399;border:1px solid rgba(16,185,129,.35)}.chat-row.left .chat-status-badge{background:#38bdf833;color:#38bdf8;border:1px solid rgba(56,189,248,.35)}.chat-active-dot{width:6px;height:6px;border-radius:50%;background:currentColor;animation:dot-blink 1.2s infinite ease-in-out}.chat-wave-mini{display:inline-flex;align-items:flex-end;gap:1.5px;height:10px}.chat-wave-mini span{display:block;width:2px;background:currentColor;border-radius:1px;animation:bounce-wave-mini .6s infinite alternate}.chat-wave-mini span:nth-child(2){animation-delay:.15s}.chat-wave-mini span:nth-child(3){animation-delay:.3s}.chat-bubble{padding:11px 15px;border-radius:14px;position:relative;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 15px #0003}.chat-row.left .chat-bubble{background:#0f172ab3;border:1.5px solid rgba(255,255,255,.09);border-top-left-radius:3px;color:#cbd5e1}.chat-row.left .chat-bubble:before{content:"";position:absolute;top:10px;left:-7px;width:0;height:0;border-top:6px solid transparent;border-bottom:6px solid transparent;border-right:7px solid rgba(15,23,42,.7);transition:border-right-color .3s ease}.chat-row.right .chat-bubble{background:#10b9811f;border:1.5px solid rgba(16,185,129,.2);border-top-right-radius:3px;color:#cbd5e1}.chat-row.right .chat-bubble:before{content:"";position:absolute;top:10px;right:-7px;width:0;height:0;border-top:6px solid transparent;border-bottom:6px solid transparent;border-left:7px solid rgba(16,185,129,.12);transition:border-left-color .3s ease}.chat-row.left .chat-bubble:hover{background:#ffffff1a;border-color:#ffffff38;transform:translateY(-1px)}.chat-row.left .chat-bubble:hover:before{border-right-color:#ffffff1a}.chat-row.right .chat-bubble:hover{background:#10b98138;border-color:#10b98159;transform:translateY(-1px)}.chat-row.right .chat-bubble:hover:before{border-left-color:#10b98138}.chat-bubble.active-bubble{transform:translateY(-2px) scale(1.02);z-index:5}.chat-row.left .chat-bubble.active-bubble{background:linear-gradient(135deg,#0284c76b,#0f172af2);border:2px solid #38bdf8;box-shadow:0 0 24px #38bdf873,0 8px 24px #0006,inset 0 0 16px #38bdf81f;color:#fff;animation:active-bubble-cyan-glow 2.5s infinite ease-in-out}.chat-row.left .chat-bubble.active-bubble:before{top:9px;left:-8px;border-top:6px solid transparent;border-bottom:6px solid transparent;border-right:8px solid #38bdf8}.chat-row.right .chat-bubble.active-bubble{background:linear-gradient(135deg,#10b9816b,#064e3bd9);border:2px solid #10b981;box-shadow:0 0 24px #10b98180,0 8px 24px #0006,inset 0 0 16px #10b9811f;color:#fff;animation:active-bubble-emerald-glow 2.5s infinite ease-in-out}.chat-row.right .chat-bubble.active-bubble:before{top:9px;right:-8px;border-top:6px solid transparent;border-bottom:6px solid transparent;border-left:8px solid #10b981}.chat-pt-text{display:flex;align-items:flex-start;justify-content:space-between;gap:8px;font-size:.96rem;font-weight:600;line-height:1.45;margin-bottom:4px;color:#f8fafc}.chat-pt-content{flex:1}.active-bubble .chat-pt-text{color:#fff;font-weight:700;font-size:1.02rem;text-shadow:0 2px 6px rgba(0,0,0,.3)}.chat-cn-text{font-size:.84rem;color:#cbd5e1;line-height:1.4}.active-bubble .chat-cn-text{color:#f1f5f9;font-weight:500}.chat-audio-btn{background:#ffffff14;border:none;border-radius:50%;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-muted);cursor:pointer;flex-shrink:0;transition:all .2s ease;padding:0}.chat-audio-btn:hover{background:#fff3;color:#fff;transform:scale(1.08)}.active-bubble .chat-audio-btn{background:#ffffff26;color:#fff}.chat-audio-btn.speaking{background:var(--accent-gold);color:#0f172a;box-shadow:0 0 12px #f59e0b99}.chat-audio-btn.speaking .wave-animation span{background:#0f172a}.chat-pronounce-helper{font-size:.74rem;color:#94a3b8;margin-top:6px;border-top:1px dashed rgba(255,255,255,.1);padding-top:5px;display:flex;flex-direction:column;gap:2px;transition:all .3s ease}.chat-pronounce-helper.active-helper{background:#00000052;border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:6px 10px;margin-top:8px;box-shadow:inset 0 1px 4px #0000004d}.chat-phonetic-badge{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;color:#38bdf8;font-weight:600;font-size:.8rem;letter-spacing:.2px}.chat-row.right .chat-phonetic-badge{color:#34d399}.chat-phonetic-cn{color:#fbbf24;font-size:.78rem}.chat-bubble-note{display:flex;align-items:flex-start;gap:4px;font-size:.73rem;color:#64748b;margin-top:4px;padding:2px 6px;max-width:100%;transition:all .3s ease}.chat-bubble-note.active-note{background:#f59e0b1f;border:1px solid rgba(245,158,11,.3);border-radius:8px;padding:6px 10px;margin-top:6px;color:#fde68a;box-shadow:0 2px 10px #f59e0b1f}.chat-bubble-note.active-note .note-icon{filter:drop-shadow(0 0 4px rgba(245,158,11,.6))}@keyframes active-bubble-cyan-glow{0%,to{box-shadow:0 0 20px #38bdf873,0 8px 24px #0006,inset 0 0 14px #38bdf81f}50%{box-shadow:0 0 30px #38bdf8b3,0 8px 26px #00000073,inset 0 0 20px #38bdf838}}@keyframes active-bubble-emerald-glow{0%,to{box-shadow:0 0 20px #10b98180,0 8px 24px #0006,inset 0 0 14px #10b9811f}50%{box-shadow:0 0 30px #10b981bf,0 8px 26px #00000073,inset 0 0 20px #10b98138}}@keyframes avatar-pulse-a{0%,to{box-shadow:0 0 12px #10b98180}50%{box-shadow:0 0 22px #10b981e6}}@keyframes avatar-pulse-b{0%,to{box-shadow:0 0 12px #38bdf880}50%{box-shadow:0 0 22px #38bdf8e6}}@keyframes bounce-wave-mini{0%{height:3px}to{height:9px}}@keyframes dot-blink{0%,to{opacity:.3;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}.header-admin-btn{background:#38bdf826;border:1px solid rgba(56,189,248,.4);color:var(--accent-cyan);padding:4px 10px;border-radius:20px;font-size:.75rem;font-weight:600;cursor:pointer;transition:all .2s ease;white-space:nowrap}.header-admin-btn:hover{background:#38bdf84d;box-shadow:0 0 12px #38bdf866;transform:translateY(-1px)}.admin-app-container{min-height:100vh;width:100%;max-width:1200px;margin:0 auto;padding:16px 20px 60px;color:#f1f5f9;box-sizing:border-box}.admin-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:#0f172ad9;border:1px solid rgba(255,255,255,.1);border-radius:16px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);margin-bottom:20px;box-shadow:0 8px 32px #0006}.admin-header-left{display:flex;align-items:center}.admin-logo-mark{display:flex;align-items:center;gap:12px}.admin-logo-icon{font-size:2rem;filter:drop-shadow(0 2px 8px rgba(0,0,0,.5))}.admin-title{font-size:1.25rem;font-weight:700;color:#fff;margin:0;letter-spacing:-.01em}.admin-subtitle{font-size:.8rem;color:var(--accent-cyan);display:block;margin-top:2px}.admin-nav-tabs{display:flex;gap:8px;background:#0f172a99;padding:6px;border-radius:12px;border:1px solid rgba(255,255,255,.08);margin-bottom:24px;overflow-x:auto}.admin-nav-item{padding:8px 16px;font-size:.9rem;font-weight:600;color:#94a3b8;background:transparent;border:none;border-radius:8px;cursor:pointer;transition:all .2s ease;white-space:nowrap}.admin-nav-item:hover{color:#fff;background:#ffffff0f}.admin-nav-item.active{color:#0f172a;background:linear-gradient(135deg,var(--accent-cyan),#38bdf8);box-shadow:0 2px 10px #38bdf866}.admin-page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:12px}.admin-page-header h2{font-size:1.35rem;margin:0 0 4px;color:#fff}.admin-page-actions{display:flex;gap:10px}.admin-stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-bottom:24px}.stat-card{background:#1e293bb3;border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:20px;display:flex;align-items:center;gap:16px;cursor:pointer;transition:all .25s ease;position:relative;overflow:hidden}.stat-card:hover{transform:translateY(-2px);border-color:#fff3;box-shadow:0 8px 24px #0000004d}.stat-icon{font-size:2.2rem;padding:12px;border-radius:12px;background:#ffffff0d}.stat-info{display:flex;flex-direction:column}.stat-label{font-size:.85rem;color:#94a3b8;font-weight:500}.stat-value{font-size:1.8rem;font-weight:800;color:#fff;line-height:1.2;margin:2px 0}.stat-sub{font-size:.78rem;color:#cbd5e1}.stat-cyan{border-left:4px solid var(--accent-cyan)}.stat-gold{border-left:4px solid var(--accent-gold)}.stat-purple{border-left:4px solid var(--accent-purple)}.stat-green{border-left:4px solid var(--accent-emerald)}.admin-card{background:#0f172abf;border:1px solid rgba(255,255,255,.08);border-radius:16px;overflow:hidden;box-shadow:0 4px 20px #00000040}.admin-card-header{padding:16px 20px;border-bottom:1px solid rgba(255,255,255,.06);display:flex;align-items:center;justify-content:space-between}.admin-card-header h3{margin:0;font-size:1.05rem;color:#fff}.admin-card-body{padding:20px}.quick-actions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.quick-action-card{display:flex;align-items:flex-start;gap:12px;background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:16px;color:#fff;text-align:left;cursor:pointer;transition:all .2s ease}.quick-action-card:hover{background:#38bdf814;border-color:var(--accent-cyan);transform:translateY(-2px)}.qa-icon{font-size:1.6rem}.qa-text strong{display:block;font-size:.95rem;margin-bottom:4px;color:#fff}.qa-text p{margin:0;font-size:.8rem;color:#94a3b8}.admin-progress-container{width:100%;height:10px;background:#ffffff1a;border-radius:6px;overflow:hidden}.admin-progress-bar{height:100%;background:linear-gradient(90deg,var(--accent-emerald),var(--accent-cyan));border-radius:6px;transition:width .4s ease}.admin-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 14px;font-size:.85rem;font-weight:600;border-radius:8px;border:none;cursor:pointer;transition:all .2s ease;white-space:nowrap}.admin-btn:disabled{opacity:.5;cursor:not-allowed}.admin-btn-primary{background:linear-gradient(135deg,var(--accent-cyan),#0284c7);color:#0f172a}.admin-btn-primary:hover:not(:disabled){filter:brightness(1.1);box-shadow:0 2px 10px #38bdf866}.admin-btn-secondary{background:#ffffff14;border:1px solid rgba(255,255,255,.15);color:#f1f5f9}.admin-btn-secondary:hover:not(:disabled){background:#ffffff26}.admin-btn-success{background:linear-gradient(135deg,var(--accent-emerald),#059669);color:#fff}.admin-btn-danger{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff}.admin-btn-warning{background:linear-gradient(135deg,var(--accent-gold),#d97706);color:#0f172a}.admin-btn-outline-primary{background:transparent;border:1px solid var(--accent-cyan);color:var(--accent-cyan)}.admin-btn-outline-primary:hover{background:#38bdf826}.admin-btn-lg{padding:12px 24px;font-size:1rem;border-radius:12px}.admin-btn-sm{padding:6px 12px;font-size:.8rem}.admin-btn-xs{padding:4px 8px;font-size:.72rem;border-radius:6px}.admin-filter-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}.filter-tabs{display:flex;gap:6px}.filter-tab{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);color:#94a3b8;padding:6px 12px;border-radius:8px;font-size:.82rem;cursor:pointer}.filter-tab.active{background:#38bdf826;border-color:var(--accent-cyan);color:var(--accent-cyan);font-weight:600}.admin-input{background:#0f172acc;border:1px solid rgba(255,255,255,.15);border-radius:8px;color:#fff;padding:8px 12px;font-size:.88rem;outline:none;width:100%;box-sizing:border-box}.admin-input:focus{border-color:var(--accent-cyan);box-shadow:0 0 0 2px #38bdf833}.admin-chapter-select-bar{display:flex;align-items:center;gap:12px;background:#1e293b99;padding:12px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.08);flex-wrap:wrap}.select-label{font-size:.88rem;font-weight:600;color:#cbd5e1;white-space:nowrap}.chapter-dropdown{max-width:320px}.chapter-meta-summary{display:flex;gap:8px}.admin-table-wrapper{background:#0f172abf;border:1px solid rgba(255,255,255,.08);border-radius:14px;overflow-x:auto;box-shadow:0 4px 20px #0003}.admin-table{width:100%;border-collapse:collapse;font-size:.88rem}.admin-table th{background:#ffffff08;padding:12px 14px;text-align:left;font-weight:600;color:#94a3b8;border-bottom:1px solid rgba(255,255,255,.08);white-space:nowrap}.admin-table td{padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.05);vertical-align:middle}.admin-table tr:hover td{background:#ffffff05}.table-actions{display:flex;gap:6px;justify-content:flex-end}.chapter-title-cell strong{font-size:.95rem;color:#fff;margin-right:6px}.chapter-badge-tag{font-size:.72rem;background:#ffffff14;padding:1px 6px;border-radius:4px;color:#cbd5e1}.chapter-desc-cell{margin:4px 0 0;font-size:.8rem;color:#94a3b8;max-width:480px}.chapter-features-pills{display:flex;gap:4px;margin-top:6px;flex-wrap:wrap}.item-pt-cell strong{font-size:.95rem;color:#fff}.item-sentence-sub{font-size:.78rem;color:var(--accent-cyan);margin-top:2px}.item-cn-cell{color:#cbd5e1}.item-sentence-cn-sub{font-size:.78rem;color:#94a3b8;margin-top:2px}.code-pill{background:#0000004d;padding:2px 6px;border-radius:4px;color:var(--accent-cyan);font-family:monospace;font-size:.82rem}.item-count-badge{background:#ffffff0f;padding:3px 8px;border-radius:6px;font-size:.8rem;color:#f1f5f9}.audio-progress-cell{display:flex;flex-direction:column;gap:4px}.audio-count-text{font-size:.78rem;color:#cbd5e1}.mini-progress-bar{width:100%;height:4px;background:#ffffff1a;border-radius:2px;overflow:hidden}.mini-bar-fill{height:100%;background:var(--accent-emerald)}.play-round-btn{width:32px;height:32px;border-radius:50%;background:#ffffff14;border:1px solid rgba(255,255,255,.15);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;font-size:.9rem}.play-round-btn:hover{background:#38bdf833;border-color:var(--accent-cyan);transform:scale(1.08)}.play-round-btn.has-human-voice{border-color:var(--accent-emerald);background:#10b98126}.play-round-btn.playing{background:#ef444440;border-color:#ef4444}.play-round-sm{width:26px;height:26px;font-size:.75rem}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:6px;font-size:.75rem;font-weight:600;white-space:nowrap}.badge-cyan{background:#38bdf82e;color:var(--accent-cyan)}.badge-gold{background:#f59e0b2e;color:var(--accent-gold)}.badge-purple{background:#a855f72e;color:var(--accent-purple)}.badge-success{background:#10b9812e;color:var(--accent-emerald)}.badge-info{background:#3b82f62e;color:#60a5fa}.badge-secondary{background:#ffffff14;color:#94a3b8}.rule-note-pill{font-size:.75rem;color:#fde68a;background:#f59e0b1a;border:1px solid rgba(245,158,11,.2);padding:2px 6px;border-radius:4px;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:2px}.admin-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.admin-modal{background:#0f172a;border:1px solid rgba(255,255,255,.12);border-radius:18px;width:100%;box-shadow:0 20px 50px #0009;display:flex;flex-direction:column;animation:modal-pop .25s cubic-bezier(.16,1,.3,1)}@keyframes modal-pop{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.admin-modal-header{padding:16px 20px;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;justify-content:space-between}.admin-modal-header h3{margin:0;font-size:1.15rem;color:#fff}.admin-modal-close{background:transparent;border:none;color:#94a3b8;font-size:1.2rem;cursor:pointer;padding:4px 8px}.admin-modal-close:hover{color:#fff}.admin-modal-body{padding:20px}.admin-modal-footer{padding:14px 20px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:flex-end;gap:10px;background:#0003;border-radius:0 0 18px 18px}.form-group{margin-bottom:14px}.form-row{display:flex;gap:12px}.form-label{display:block;font-size:.82rem;font-weight:600;color:#cbd5e1;margin-bottom:6px}.admin-tab-group{display:flex;background:#ffffff0d;padding:4px;border-radius:10px;margin-bottom:16px;gap:4px}.admin-tab-btn{flex:1;padding:8px;background:transparent;border:none;color:#94a3b8;font-weight:600;font-size:.85rem;border-radius:8px;cursor:pointer;transition:all .2s ease}.admin-tab-btn.active{background:#38bdf833;color:var(--accent-cyan)}.recorder-reference-box{background:#1e293b99;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:14px;margin-bottom:16px}.recorder-ref-label{font-size:.78rem;color:#94a3b8}.recorder-ref-text{font-size:1.15rem;font-weight:700;color:#fff;margin:6px 0 10px}.recorder-record-panel{text-align:center;padding:20px 0}.record-mic-visualizer{display:flex;flex-direction:column;align-items:center;gap:10px}.mic-icon-circle{width:76px;height:76px;border-radius:50%;background:#ffffff0f;border:2px solid rgba(255,255,255,.15);display:flex;align-items:center;justify-content:center;font-size:2.2rem;transition:all .3s ease}.record-mic-visualizer.recording .mic-icon-circle{background:#ef444440;border-color:#ef4444;animation:mic-pulse 1.2s infinite ease-in-out}@keyframes mic-pulse{0%{transform:scale(1);box-shadow:0 0 #ef444499}50%{transform:scale(1.1);box-shadow:0 0 20px 10px #ef44444d}to{transform:scale(1);box-shadow:0 0 #ef444400}}.record-timer{font-size:1.8rem;font-weight:800;font-family:monospace;color:#fff}.record-hint{font-size:.82rem;color:#94a3b8;margin:0}.admin-dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px dashed rgba(255,255,255,.2);border-radius:14px;padding:32px 20px;cursor:pointer;transition:all .2s ease;background:#ffffff05}.admin-dropzone:hover{border-color:var(--accent-cyan);background:#38bdf80a}.dropzone-icon{font-size:2.5rem;margin-bottom:8px}.dropzone-text{font-size:.95rem;font-weight:600;color:#fff}.dropzone-hint{font-size:.78rem;color:#94a3b8;margin-top:4px}.file-info-pill{margin-top:12px;background:#10b98126;border:1px solid var(--accent-emerald);padding:8px 12px;border-radius:8px;font-size:.82rem;color:#6ee7b7}.recorder-preview-box{margin-top:16px;background:#10b98114;border:1px solid rgba(16,185,129,.25);border-radius:12px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between}.preview-info{display:flex;align-items:center;gap:8px}.preview-badge{font-size:.75rem;color:var(--accent-emerald);font-weight:600}.preview-controls{display:flex;gap:8px}.paragraph-edit-card{background:#1e293b80;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:14px}.paragraph-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.paragraph-index-badge{font-size:.8rem;font-weight:700;color:var(--accent-cyan)}.paragraph-audio-pill{font-size:.75rem;color:#6ee7b7;background:#10b9811f;padding:3px 8px;border-radius:6px;margin-top:6px}.admin-toast-container{position:fixed;bottom:24px;right:24px;display:flex;flex-direction:column;gap:10px;z-index:2000}.admin-toast{display:flex;align-items:center;gap:10px;padding:12px 18px;border-radius:12px;font-size:.9rem;font-weight:500;color:#fff;box-shadow:0 8px 24px #0006;animation:toast-slide .3s cubic-bezier(.16,1,.3,1)}@keyframes toast-slide{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.toast-success{background:#065f46;border:1px solid #10b981}.toast-error{background:#991b1b;border:1px solid #ef4444}.toast-warning{background:#92400e;border:1px solid #f59e0b}.toast-info{background:#1e3a8a;border:1px solid #3b82f6}.admin-footer-status{display:flex;justify-content:space-between;margin-top:32px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);font-size:.82rem;color:#94a3b8;flex-wrap:wrap;gap:8px}.block-card.admin-theme{border-color:#38bdf84d;background:linear-gradient(135deg,#0f172acc,#1e293bcc)}.block-card.admin-theme:hover{border-color:var(--accent-cyan);box-shadow:0 8px 30px #38bdf840}.admin-user-badge{display:flex;align-items:center;gap:6px;background:#38bdf81f;border:1px solid rgba(56,189,248,.25);color:var(--accent-cyan);padding:6px 12px;border-radius:20px;font-size:.82rem;font-weight:600}.admin-header-btn{font-size:.82rem;padding:7px 14px;border-radius:8px}.admin-btn-outline-danger{background:transparent;border:1px solid rgba(239,68,68,.5);color:#f87171}.admin-btn-outline-danger:hover{background:#ef444426;border-color:#ef4444;color:#fff}.admin-login-wrapper{min-height:100vh;width:100%;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:radial-gradient(circle at 50% 20%,#1e3a8a59,#0f172af2 70%);position:relative;overflow-y:auto}.admin-login-card{width:100%;max-width:440px;background:#0f172ad9;border:1px solid rgba(255,255,255,.14);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:24px;padding:36px 32px;box-shadow:0 24px 60px #000000b3,0 0 40px #38bdf81a;animation:modal-pop .3s cubic-bezier(.16,1,.3,1)}.admin-login-header{text-align:center;margin-bottom:24px}.admin-login-badge{display:inline-flex;align-items:center;gap:8px;background:#38bdf81f;border:1px solid rgba(56,189,248,.3);padding:4px 14px;border-radius:30px;font-size:.75rem;font-weight:700;color:var(--accent-cyan);letter-spacing:.5px;margin-bottom:12px}.admin-login-title{font-size:1.55rem;font-weight:700;color:#fff;margin:0 0 6px}.admin-login-subtitle{font-size:.82rem;color:var(--text-muted);margin:0;line-height:1.4}.admin-login-error,.admin-modal-error{display:flex;align-items:center;gap:8px;background:#ef444426;border:1px solid rgba(239,68,68,.4);color:#fca5a5;padding:10px 14px;border-radius:10px;font-size:.85rem;margin-bottom:18px;animation:shake .3s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}.input-with-icon{position:relative;display:flex;align-items:center;width:100%}.input-with-icon .input-icon{position:absolute;left:12px;font-size:1rem;pointer-events:none;opacity:.7}.input-with-icon .form-control-has-icon{padding-left:40px;padding-right:44px;width:100%}.password-toggle-btn{position:absolute;right:10px;background:transparent;border:none;cursor:pointer;padding:4px;font-size:1.05rem;opacity:.7;transition:opacity .2s;display:flex;align-items:center;justify-content:center}.password-toggle-btn:hover{opacity:1}.admin-login-submit-btn{width:100%;margin-top:10px;padding:12px;font-size:.95rem;font-weight:600;display:flex;align-items:center;justify-content:center}.admin-login-hint{margin-top:22px;padding:14px 16px;background:#1e293b99;border:1px dashed rgba(56,189,248,.3);border-radius:12px;font-size:.8rem;color:#94a3b8}.admin-login-hint .hint-header{display:flex;align-items:center;gap:6px;color:#e2e8f0;margin-bottom:6px}.admin-login-hint .hint-body{display:flex;gap:16px;margin:6px 0;color:#f1f5f9}.admin-login-hint code{background:#0006;padding:2px 6px;border-radius:4px;color:var(--accent-cyan);font-family:monospace;font-weight:600}.admin-login-hint .hint-note{margin:6px 0 0;font-size:.75rem;color:#64748b;line-height:1.35}.admin-login-footer{margin-top:20px;text-align:center}.back-to-learner-btn{background:transparent;border:none;color:#94a3b8;font-size:.82rem;cursor:pointer;transition:color .2s;padding:4px 8px}.back-to-learner-btn:hover{color:var(--accent-cyan)}.change-password-dialog{max-width:460px;width:92%;background:#0f172a;border:1px solid rgba(255,255,255,.14);border-radius:20px;box-shadow:0 24px 60px #000c}.modal-title-with-icon{display:flex;align-items:center;gap:8px}.modal-title-with-icon h3{margin:0;font-size:1.15rem;font-weight:700;color:#fff}.modal-close-btn{background:transparent;border:none;color:#94a3b8;font-size:1.2rem;cursor:pointer;padding:4px 8px;transition:color .2s}.modal-close-btn:hover{color:#fff}.admin-modal-form{padding:20px}.admin-modal-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:24px}.admin-loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#0a0f1d}.admin-loading-box{text-align:center;color:var(--text-muted)}.admin-loading-spinner{font-size:2.2rem;display:inline-block;animation:spin 1.5s infinite linear;margin-bottom:12px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.text-danger{color:#ef4444}