body.fl-open{overflow:hidden}.fl-overlay{position:fixed;inset:0;z-index:1000;background:rgba(20,30,28,0.55);backdrop-filter:blur(3px);display:flex;justify-content:center;align-items:stretch;animation:fl-fade 0.18s ease}@keyframes fl-fade{from{opacity:0}to{opacity:1}}.fl-sheet{background:var(--bg,#f7faf9);width:100%;max-width:760px;display:flex;flex-direction:column;box-shadow:0 0 40px rgba(0,0,0,0.18);animation:fl-slide 0.22s cubic-bezier(.2,.7,.3,1)}@keyframes fl-slide{from{transform:translateY(16px);opacity:.6}to{transform:translateY(0);opacity:1}}.fl-topbar{flex:0 0 auto;display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border,#e3eae8);background:var(--card,#fff)}.fl-topbar-title{font-weight:600;font-size:1rem;flex:1;color:var(--text,#1d2b28)}.fl-close{flex:0 0 auto;width:34px;height:34px;border:none;border-radius:9px;background:var(--bg,#eef3f1);color:var(--text,#1d2b28);font-size:1.4rem;line-height:1;cursor:pointer}.fl-close:hover{background:var(--border,#e0e7e5)}.fl-scroll{flex:1 1 auto;overflow-y:auto;padding:18px;-webkit-overflow-scrolling:touch}.fl-section{margin-bottom:26px}.fl-section:empty{margin:0}.fl-h3{font-size:1.05rem;margin:0 0 6px;color:var(--text,#1d2b28)}.fl-hint{font-size:0.85rem;color:var(--muted,#6a7975);margin:0 0 12px}.fl-loading,.fl-empty{color:var(--muted,#6a7975);font-size:0.9rem;padding:14px 0}.fl-loading--full,.fl-empty{text-align:center;padding:60px 20px}.fl-intro{display:flex;gap:12px;padding:14px;border-radius:12px;background:var(--accent-soft,#e8f3ef);margin-bottom:16px}.fl-intro-emoji{font-size:1.5rem}.fl-intro-title{font-weight:600;margin-bottom:3px}.fl-intro-body{font-size:0.9rem;color:var(--muted,#51605c)}.fl-video{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;margin-bottom:16px;background:#000}.fl-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.fl-lesson-title{font-size:1.2rem;margin:0 0 4px}.fl-body{line-height:1.7;color:var(--text,#25322f);font-size:0.96rem}.fl-body table{border-collapse:collapse;width:100%;margin:12px 0}.fl-body th,.fl-body td{border:1px solid var(--border,#e3eae8);padding:6px 9px;font-size:0.88rem}.fl-body img{max-width:100%;height:auto;border-radius:8px}.fl-blank-label{font-weight:600}.fl-blank-label--gap{color:var(--muted,#97a4a0);letter-spacing:1px}.fl-blank-widget{display:inline-block}.fl-blank-widget select{border:1.5px solid var(--border,#cfdbd7);border-radius:7px;padding:2px 6px;font-size:0.9rem;background:var(--card,#fff);color:var(--text,#1d2b28);max-width:220px}.fl-blank-widget.correct select{border-color:#2f9e7e;background:#e7f6ef}.fl-blank-widget.wrong select{border-color:#d99a3a;background:#fbf2e4}.fl-blank-widget.filled select{border-color:var(--accent,#2f9e7e)}.fl-diag-progress{height:5px;border-radius:3px;background:var(--border,#e3eae8);overflow:hidden;margin-bottom:14px}.fl-diag-progress-fill{height:100%;background:var(--accent,#2f9e7e);width:0;transition:width 0.3s ease}.fl-diag-q{font-weight:600;margin-bottom:12px}.fl-diag-opts{display:flex;flex-direction:column;gap:8px}.fl-option{border:1.5px solid var(--border,#d9e3e0);border-radius:10px;padding:11px 14px;cursor:pointer;font-size:0.92rem;transition:border-color .15s,background .15s}.fl-option:hover{border-color:var(--accent,#2f9e7e)}.fl-option.selected{border-color:var(--accent,#2f9e7e);background:var(--accent-soft,#e8f3ef)}.fl-diag-report{margin-top:8px}.fl-diag-score{font-weight:700;font-size:1.05rem;margin-bottom:12px}.fl-bd-item{border-radius:10px;padding:10px 12px;margin-bottom:8px;border:1px solid var(--border,#e3eae8)}.fl-bd-item.no{background:#fbf2e4;border-color:#ecd5ac}.fl-bd-item.ok{background:#eef7f2;border-color:#cfe9dc}.fl-bd-head{display:flex;gap:8px;font-weight:600;margin-bottom:4px}.fl-bd-mark.ok{color:#2f9e7e}.fl-bd-mark.no{color:#d99a3a}.fl-bd-line{font-size:0.86rem;color:var(--muted,#51605c)}.fl-bd-line.right b{color:#2f9e7e}.fl-ai-hints{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.fl-ai-hint{border:1px solid var(--border,#d9e3e0);background:var(--card,#fff);border-radius:20px;padding:5px 12px;font-size:0.82rem;cursor:pointer;color:var(--text,#1d2b28)}.fl-ai-hint:hover{border-color:var(--accent,#2f9e7e)}.fl-ai-messages{display:flex;flex-direction:column;gap:8px;max-height:360px;overflow-y:auto;margin-bottom:10px}.fl-ai-msg{padding:9px 13px;border-radius:12px;font-size:0.9rem;line-height:1.55;max-width:90%}.fl-ai-msg.user{align-self:flex-end;background:var(--accent,#2f9e7e);color:#fff}.fl-ai-msg.bot{align-self:flex-start;background:var(--card,#fff);border:1px solid var(--border,#e3eae8)}.fl-ai-msg.err{align-self:flex-start;background:#fbf2e4;border:1px solid #ecd5ac;color:#8a5a16}.fl-ai-msg p:first-child{margin-top:0}.fl-ai-msg p:last-child{margin-bottom:0}.fl-ai-cta{display:inline-block;margin-top:8px;background:var(--accent,#2f9e7e);color:#fff;padding:7px 14px;border-radius:9px;text-decoration:none;font-size:0.85rem}.fl-ai-input{display:flex;gap:8px}.fl-ai-input input{flex:1;border:1.5px solid var(--border,#cfdbd7);border-radius:10px;padding:10px 13px;font-size:0.92rem;background:var(--card,#fff);color:var(--text,#1d2b28)}.fl-ai-input button{flex:0 0 auto;width:44px;border:none;border-radius:10px;background:var(--accent,#2f9e7e);color:#fff;font-size:1.2rem;cursor:pointer}.fl-ai-remaining{font-size:0.78rem;color:var(--muted,#6a7975);margin-top:6px}.fl-caret{display:inline-block;width:7px;height:1.1em;background:var(--accent,#2f9e7e);vertical-align:text-bottom;animation:fl-blink 1s steps(2) infinite}@keyframes fl-blink{0%,50%{opacity:1}50.01%,100%{opacity:0}}.fl-srs-start{border:none;background:var(--accent,#2f9e7e);color:#fff;padding:11px 18px;border-radius:10px;font-size:0.92rem;cursor:pointer}.fl-srs-card{position:relative;min-height:180px;perspective:1000px}.fl-srs-face{border:1px solid var(--border,#e3eae8);border-radius:14px;padding:22px;background:var(--card,#fff)}.fl-srs-back{display:none}.fl-srs-card.flipped .fl-srs-front{display:none}.fl-srs-card.flipped .fl-srs-back{display:block}.fl-srs-q{font-size:0.82rem;color:var(--muted,#6a7975);margin-bottom:10px}.fl-srs-phrase{font-size:1.05rem;line-height:1.6;margin-bottom:18px}.fl-srs-phrase mark{background:#fbf2e4;padding:0 4px;border-radius:4px}.fl-srs-flip{border:1.5px solid var(--accent,#2f9e7e);background:transparent;color:var(--accent,#2f9e7e);padding:9px 16px;border-radius:9px;cursor:pointer}.fl-srs-a{font-size:1.2rem;font-weight:600;margin-bottom:16px;color:var(--accent,#2f9e7e)}.fl-srs-grade{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.fl-srs-grade button{border:1.5px solid var(--border,#d9e3e0);background:var(--card,#fff);border-radius:9px;padding:9px 4px;font-size:0.82rem;cursor:pointer;color:var(--text,#1d2b28)}.fl-srs-grade button:hover{border-color:var(--accent,#2f9e7e)}.fl-srs-done-title{font-weight:700;font-size:1.05rem;margin-bottom:6px}.fl-srs-pills{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.fl-srs-pill{font-size:0.8rem;background:var(--accent-soft,#e8f3ef);border-radius:16px;padding:4px 11px}.fl-upsell{flex:0 0 auto;display:flex;align-items:center;gap:12px;padding:12px 18px;border-top:1px solid var(--border,#e3eae8);background:var(--card,#fff)}.fl-upsell-text{flex:1;font-size:0.88rem;color:var(--text,#1d2b28)}.fl-upsell-text s{color:var(--muted,#97a4a0)}.fl-upsell-btn{flex:0 0 auto;background:var(--accent,#2f9e7e);color:#fff;text-decoration:none;padding:10px 18px;border-radius:10px;font-weight:600;font-size:0.9rem}@media (max-width:600px){.fl-sheet{max-width:100%}.fl-scroll{padding:14px}.fl-srs-grade{grid-template-columns:repeat(2,1fr)}}