@import"https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap";.btp-app{--bg:#f7f8fc;--surface:#fff;--ink:#242a3c;--muted:#7d8498;--line:#e8ebf3;--accent:#635bdf;--soft:#f0efff;font:14px/1.6 DM Sans,sans-serif;color:var(--ink);background:var(--bg);min-height:100vh}.btp-app.dark{--bg:#141923;--surface:#1d2330;--ink:#e8edf8;--muted:#a0aabe;--line:#30394b;--soft:#302d50}.btp-app *{box-sizing:border-box}.btp-app button,.btp-app input,.btp-app textarea,.btp-app select{font:inherit}.btp-app button{cursor:pointer;color:inherit}.btp-app button:disabled{opacity:.45;cursor:not-allowed}.btp-app a{color:inherit;text-decoration:none}.btp-app :focus-visible{outline:3px solid #9993ef;outline-offset:3px}.btp-app h1,.btp-app h2,.btp-app h3{font-family:Manrope,sans-serif;line-height:1.35;letter-spacing:-.035em;color:var(--ink)}.btp-app h1{font-size:30px;margin:8px 0 12px;font-weight:800}.btp-app h2{font-size:20px;margin:0 0 10px;font-weight:800}.btp-app h3{font-size:16px;margin:0 0 8px}.btp-app p{margin:0 0 16px}.btp-app svg{flex-shrink:0;vertical-align:middle}.btp-app .muted,.btp-app small{color:var(--muted)}.btp-app .small,.btp-app small{font-size:12px}.btp-app .button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid transparent;border-radius:8px;padding:10px 15px;min-height:40px;font-size:13px;font-weight:600;white-space:nowrap;transition:transform .16s}.btp-app .button:hover:not(:disabled){transform:translateY(-1px)}.btp-app .primary{background:var(--accent);color:#fff;box-shadow:0 3px 7px #635bdf1c}.btp-app .white{background:var(--surface);border-color:var(--line)}.btp-app .subtle{background:var(--soft);color:var(--accent)}.btp-app .full{width:100%}.btp-app .text-button{border:0;background:none;padding:0;display:inline-flex;align-items:center;gap:7px;color:var(--accent);font-size:13px;font-weight:600}.btp-app .icon-button{background:none;border:0;border-radius:7px;display:inline-flex;align-items:center;justify-content:center;width:33px;height:33px;color:var(--muted)}.btp-app .icon-button:hover{background:var(--soft);color:var(--accent)}.btp-app .marked{color:var(--accent)}.btp-app .badge{display:inline-flex;align-items:center;padding:3px 8px;border-radius:5px;font-size:11px;font-weight:600;white-space:nowrap;background:var(--bg);color:var(--muted)}.btp-app .blue{background:#efefff;color:#6259cf}.btp-app .green,.btp-app .teal{background:#eaf7f1;color:#278b69}.btp-app .orange{background:#fff2e6;color:#b8763c}.btp-app .purple{background:#f4edff;color:#8b5cb1}.btp-app .chip-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.btp-app .sidebar{width:232px;position:fixed;inset:0 auto 0 0;background:var(--surface);border-right:1px solid var(--line);padding:34px 20px 18px;display:flex;flex-direction:column;z-index:30}.btp-app .brand{display:flex;align-items:center;gap:11px;font:800 21px/1.1 Manrope,sans-serif;margin:0 10px 44px;letter-spacing:-.7px}.btp-app .brand-second{display:block;font-size:13px;font-weight:500;letter-spacing:.5px;margin-top:4px}.btp-app .brand-mark{width:40px;height:40px;background:var(--accent);color:#fff;border-radius:12px;display:grid;place-items:center}.btp-app .nav-caption{font-size:9px;font-weight:700;letter-spacing:1.5px;color:var(--muted);margin:0 13px 12px}.btp-app .sidebar nav a{display:flex;gap:12px;align-items:center;border-radius:8px;margin:4px 0;padding:11px 13px;color:var(--muted);font-size:13px;font-weight:500}.btp-app .sidebar nav a.active{background:var(--soft);color:var(--accent);font-weight:700}.btp-app .sidebar nav a:hover{background:var(--bg)}.btp-app .sidebar nav .nav-caption{margin-top:33px}.btp-app .nav-count{font-size:10px;padding:1px 5px;background:var(--accent);color:#fff;border-radius:4px;margin-left:auto}.btp-app .sidebar-bottom{margin-top:auto;padding-top:35px}.btp-app 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38px;background:var(--surface);border-bottom:1px solid var(--line);gap:20px}.btp-app .breadcrumb,.btp-app .topbar-actions{display:flex;align-items:center;gap:13px}.btp-app .breadcrumb{font-size:11px;color:var(--muted)}.btp-app .breadcrumb strong{font-weight:500;color:var(--ink)}.btp-app .global-search{border:1px solid var(--line);border-radius:7px;display:flex;align-items:center;gap:10px;padding:8px 10px;background:var(--bg);color:var(--muted)!important;font-size:11px!important}.btp-app .global-search kbd{font-size:10px;margin-left:42px;background:var(--surface);padding:1px 4px;border:1px solid var(--line);border-radius:3px}.btp-app .mobile-menu{display:none!important}.btp-app .page-main{max-width:1600px;margin:auto;padding:36px 38px 28px}.btp-app .page-title{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:29px}.btp-app .page-title p{color:var(--muted);font-size:13px;margin:0}.btp-app 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.card-kicker{display:flex;align-items:center;gap:9px;padding:20px 23px;font-size:9px;letter-spacing:1.2px;font-weight:700;color:var(--muted)}.btp-app .card-kicker .badge{margin-left:auto;font-size:10px;letter-spacing:0}.btp-app .tiny-line{width:6px;height:6px;border-radius:50%;background:#8077ef}.btp-app .focus-body{display:grid;grid-template-columns:1.2fr 1fr;padding:8px 24px 24px;gap:20px;align-items:center}.btp-app .focus-body h2{font-size:25px;margin:9px 0 12px}.btp-app .focus-body p{font-size:12px;line-height:1.7;color:var(--muted);max-width:390px}.btp-app .focus-body .button{margin-top:24px}.btp-app .focus-body .chip-row .small{font-size:10px}.btp-app .dot-separator{margin:0 5px}.btp-app .pattern-visual{background:linear-gradient(140deg,var(--bg),var(--soft));border:1px solid var(--line);border-radius:12px;padding:23px 15px;text-align:center}.btp-app .visual-caption{font-size:8px;letter-spacing:1.7px;color:var(--muted);margin-bottom:25px}.btp-app .number-row{display:flex;gap:6px;justify-content:center}.btp-app .number-row span{display:grid;place-items:center;width:35px;height:42px;border-radius:6px;border:1px solid var(--line);background:var(--surface);font:600 18px Manrope,sans-serif}.btp-app .number-row .missing{border:1px dashed #8b82e3;background:var(--soft);color:var(--accent)}.btp-app .visual-bracket{height:14px;border:1px solid #b1ace9;border-top:0;width:75px;margin:8px auto 19px;border-radius:0 0 5px 5px}.btp-app .visual-answer{font-size:8px;color:var(--muted)}.btp-app .visual-answer svg{width:13px;margin-right:5px;color:var(--accent)}.btp-app .focus-bottom{display:flex;align-items:center;gap:8px;border-top:1px solid var(--line);padding:13px 23px;font-size:10px;color:var(--muted)}.btp-app .focus-bottom svg{color:#559985}.btp-app .focus-bottom a{margin-left:auto;color:var(--accent);white-space:nowrap}.btp-app .rhythm-card{background:linear-gradient(145deg,#f0f8f5,#f6faf7);border:1px solid #e3eee8;border-radius:12px;padding:22px}.btp-app.dark .rhythm-card{background:#1e302b;border-color:#31473e}.btp-app .rhythm-heading{display:flex;gap:7px;align-items:center;font-size:10px;color:#448570;margin-bottom:18px}.btp-app .rhythm-card h2{font-size:18px}.btp-app .rhythm-card p{font-size:11px;color:var(--muted);line-height:1.7}.btp-app .week-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;margin-top:23px;text-align:center;font-size:9px;color:var(--muted)}.btp-app .day{display:grid;place-items:center;width:27px;height:29px;border-radius:6px;border:1px solid #dfe9e3;margin:7px auto 0;font-size:10px;background:var(--surface)}.btp-app .day.active-day{background:#428e73;color:#fff}.btp-app .rhythm-summary{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dfe9e3;padding:16px 0 13px}.btp-app .rhythm-summary strong{font-size:19px}.btp-app .rhythm-summary small,.btp-app .rhythm-summary>span{font-size:9px;color:var(--muted);font-weight:400}.btp-app .rhythm-card>button{background:none;border:0;display:flex;width:100%;justify-content:space-between;align-items:center;color:#448570;padding:14px 0 0;font-size:11px}.btp-app .section-heading{display:flex;align-items:center;justify-content:space-between;margin:30px 0 18px;gap:16px}.btp-app .section-heading h2{font-size:18px;margin:0 0 5px}.btp-app .section-heading p{font-size:12px;color:var(--muted);margin:0}.btp-app .section-heading a{font-size:11px;color:var(--accent);display:flex;align-items:center;gap:7px}.btp-app .module-grid,.btp-app .lab-grid,.btp-app .library-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.btp-app .module-card{text-align:left;border:1px solid var(--line);border-radius:10px;background:var(--surface);padding:21px;transition:transform .16s,box-shadow .16s}.btp-app .module-card:hover{transform:translateY(-3px);box-shadow:0 8px 22px #292f5110}.btp-app .module-symbol{width:36px;height:36px;display:grid;place-items:center;border-radius:8px;margin-bottom:18px;background:#eef0ff;color:#6b67bf}.btp-app .module-symbol svg{width:19px}.btp-app .tone-1{background:#fff1e7;color:#bf9469}.btp-app .tone-2{background:#eaf5f4;color:#589990}.btp-app .module-card>small{font-size:8px;letter-spacing:1.2px}.btp-app .module-card h3{margin-top:6px;font-size:15px}.btp-app .module-card p{font-size:11px;color:var(--muted);min-height:50px;line-height:1.7}.btp-app .progress-line,.btp-app .mini-progress{height:4px;border-radius:4px;background:var(--bg);overflow:hidden}.btp-app .progress-line span,.btp-app .mini-progress span{display:block;background:var(--accent);height:100%}.btp-app .module-footer{display:flex;justify-content:space-between;align-items:center;margin-top:10px;color:var(--muted);font-size:9px}.btp-app .bottom-banner{display:flex;align-items:center;gap:17px;margin-top:26px;border:1px solid var(--line);border-radius:10px;padding:20px 23px;background:var(--surface)}.btp-app .banner-icon{width:45px;height:45px;display:grid;place-items:center;background:var(--soft);color:var(--accent);border-radius:10px}.btp-app .bottom-banner h3{font-size:14px;margin-bottom:5px}.btp-app .bottom-banner p{font-size:11px;color:var(--muted);margin:0}.btp-app .bottom-banner .button{margin-left:auto}.btp-app .page-footer{display:flex;justify-content:space-between;padding:18px 38px 24px;color:var(--muted);font-size:9px}.btp-app .page-footer>span:first-child{font-weight:700}.btp-app .filter-card,.btp-app .question-list,.btp-app .panel{border:1px solid var(--line);border-radius:10px;background:var(--surface);overflow:hidden}.btp-app .filter-tabs,.btp-app .pill-tabs,.btp-app .collection-tabs,.btp-app .problem-tabs{display:flex;align-items:center;gap:20px;overflow:auto}.btp-app .filter-tabs{padding:0 20px;border-bottom:1px solid var(--line)}.btp-app .filter-tabs button,.btp-app .problem-tabs button{border:0;border-bottom:2px solid transparent;padding:15px 0;background:none;font-size:12px;white-space:nowrap;color:var(--muted)}.btp-app .filter-tabs button.selected,.btp-app .problem-tabs button.selected{color:var(--accent);border-color:var(--accent)}.btp-app .filter-tabs span,.btp-app .collection-tabs span{font-size:10px;background:var(--soft);padding:2px 5px;border-radius:4px;margin-left:5px}.btp-app .filter-controls{display:flex;gap:14px;padding:18px 20px}.btp-app input,.btp-app textarea,.btp-app select{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:7px;padding:10px 12px;min-width:0;max-width:100%}.btp-app textarea{resize:vertical}.btp-app .search-field{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:7px;padding:0 12px;color:var(--muted);flex:1;min-width:0}.btp-app .search-field input{width:100%;border:0;padding:10px 0;background:none;font-size:12px}.btp-app .filter-controls select{font-size:12px;max-width:240px}.btp-app 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.collection-tabs .selected{color:var(--accent);background:var(--soft);border-color:#d6d1f8}.btp-app .curriculum-module{border:1px solid var(--line);background:var(--surface);border-radius:9px;margin-bottom:12px;overflow:hidden}.btp-app .module-toggle{display:flex;align-items:center;gap:18px;width:100%;background:none;border:0;padding:21px;text-align:left}.btp-app .module-number{width:37px;height:37px;border-radius:8px;background:var(--bg);display:grid;place-items:center;color:var(--muted);font-size:12px}.btp-app .expanded .module-number{background:var(--soft);color:var(--accent)}.btp-app .module-name{flex:1}.btp-app .module-name strong{display:block;font-size:14px}.btp-app .module-name small{display:block;font-size:10px;margin-top:3px}.btp-app .mini-progress{width:80px}.btp-app .module-description{display:grid;grid-template-columns:1fr 2fr;gap:25px;padding:17px 24px;background:var(--bg);border-block:1px solid var(--line)}.btp-app .module-description small{font-size:8px;letter-spacing:1px}.btp-app .module-description p{font-size:11px;margin:4px 0}.btp-app .review-date{font-size:10px;color:var(--muted);padding:12px 19px 0}.btp-app .new-list{display:flex;align-items:center;gap:15px;background:var(--surface);padding:15px;border:1px solid var(--line);border-radius:9px}.btp-app .new-list>svg{color:var(--accent)}.btp-app .new-list input{flex:1;border:0}.btp-app .lab-card{border:1px solid var(--line);border-radius:11px;background:var(--surface);padding:25px;display:flex;flex-direction:column;align-items:flex-start}.btp-app .lab-icon{display:grid;place-items:center;width:49px;height:49px;border-radius:12px;background:var(--soft);color:var(--accent);margin-bottom:24px}.btp-app .lab-card>small{font-size:9px;letter-spacing:1px}.btp-app .lab-card h2{font-size:19px;margin-top:9px}.btp-app .lab-card p{font-size:12px;color:var(--muted);line-height:1.8;flex:1}.btp-app .lab-duration{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);margin:10px 0 20px}.btp-app .lab-principles{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.btp-app .lab-principles>div{border-left:2px solid var(--line);padding:8px 18px}.btp-app .lab-principles span{font-size:10px;color:var(--accent)}.btp-app .lab-principles h3{font-size:14px;margin-top:10px}.btp-app .lab-principles p{font-size:12px;color:var(--muted);margin:0}.btp-app .journal{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.btp-app .journal article{background:var(--surface);border:1px solid var(--line);border-radius:9px;padding:20px}.btp-app .journal article>div{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.btp-app .journal p{font-size:12px;color:var(--muted);white-space:pre-wrap}.btp-app .journal a{color:var(--accent);font-size:12px}.btp-app .subject-strip{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:28px}.btp-app 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