@charset "UTF-8";
:root{--bt-ink:#302a2c;--bt-wine:#572b40;--bt-muted:#746c6e;--bt-paper:#faf8f4;--bt-line:#dfd9d3;--bt-sage:#626d57;--bt-radius:18px}*{box-sizing:border-box}body{margin:0;color:var(--bt-ink);background:var(--bt-paper);font-family:"Noto Sans JP","Yu Gothic UI","Hiragino Kaku Gothic ProN",system-ui,sans-serif;font-size:15px;line-height:1.8}a{color:var(--bt-wine);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,a,input,select,textarea,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b57235;outline-offset:4px}.bt-skip{position:fixed;z-index:999;left:20px;top:-80px;background:white;padding:12px}.bt-skip:focus{top:12px}.bt-header{max-width:1440px;margin:auto;padding:22px 4.8%;display:flex;align-items:center;gap:34px;border-bottom:1px solid var(--bt-line);line-height:1.45}.bt-brand{display:flex;align-items:center;gap:12px;color:var(--bt-wine);text-decoration:none;font-size:21px;font-weight:700;letter-spacing:1.7px;white-space:nowrap}.bt-mark{display:grid;place-items:center;width:43px;height:43px;border:1px solid #9d7a87;border-radius:50%;font:20px Georgia,serif;letter-spacing:-1px}.bt-brand small{display:block;font-size:10px;font-weight:400;letter-spacing:1px;margin-top:4px}.bt-header nav{display:flex;gap:25px;flex:1;justify-content:center}.bt-header nav a{font-size:13px;color:var(--bt-ink);text-decoration:none;white-space:nowrap}.bt-account-nav{display:flex;align-items:center;gap:13px;font-size:12px}.bt-account-nav>a{white-space:nowrap}.bt-pill{display:inline-flex;align-items:center;border:1px solid #d6cfc7;border-radius:30px;padding:2px 9px;font:600 10px/1.8 system-ui,sans-serif;letter-spacing:1.5px;background:#f3f0ea;color:#5d6255}.bt-pill.is-pro{background:var(--bt-wine);border-color:var(--bt-wine);color:#fff}.bt-small-button,.bt-button{display:inline-flex;align-items:center;justify-content:center;gap:24px;border:1px solid var(--bt-wine);border-radius:7px;background:var(--bt-wine);color:white;text-decoration:none;padding:13px 22px;font-weight:600;font-size:14px;line-height:1.5}.bt-small-button{background:transparent;color:var(--bt-wine);font-size:12px;padding:9px 14px}.bt-button.light{background:#fffaf2;color:var(--bt-wine);border-color:#fffaf2}.bt-button:hover{filter:brightness(1.1)}.bt-plan-note{padding:12px 5%;background:#eeeae0;color:#504844;font-size:12px;display:flex;align-items:center;justify-content:space-between;gap:18px}.bt-plan-note b{font-size:10px;letter-spacing:1.2px;margin-right:8px}.bt-plan-note a{white-space:nowrap}.bt-home{max-width:1220px;margin:auto}.bt-hero{padding:75px 38px 68px;display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:65px}.bt-eyebrow{font:600 10px/1.7 system-ui,sans-serif;letter-spacing:2.8px;text-transform:uppercase;color:var(--bt-sage);margin:0 0 18px}.bt-hero h1{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-weight:500;font-size:clamp(32px,3.3vw,48px);line-height:1.6;letter-spacing:.08em;margin:0 0 27px}.bt-lead{font-size:15px;line-height:2;color:#655b5c}.bt-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin:25px 0 15px}.bt-actions>a:not(.bt-button){font-size:13px}.bt-caption{font-size:12px;color:var(--bt-muted);line-height:1.9}.bt-orbit{width:320px;height:320px;border:1px solid #d5cfc4;border-radius:50%;justify-self:center;position:relative;background:radial-gradient(ellipse at center,#ede6db8c 0,transparent 64%)}.bt-orbit:before,.bt-orbit:after{content:"";position:absolute;inset:25px;border:1px dashed #ded7cd;border-radius:50%}.bt-orbit:after{inset:-21px;border-style:solid;border-color:#e7e0d733}.bt-glass{position:absolute;left:105px;top:62px;width:110px;height:115px;border:1.5px solid #ad8b86;border-top:0;border-radius:0 0 52px 52px;overflow:visible}.bt-glass>span{position:absolute;inset:44px 6px 6px;border-radius:0 0 48px 48px;background:linear-gradient(160deg,#b27c88,#643147);opacity:.87}.bt-glass>span:before{content:"";position:absolute;left:0;right:0;top:-7px;height:15px;border-radius:50%;background:#bc8f9a}.bt-glass:before{content:"";position:absolute;top:114px;left:53px;width:1px;height:74px;background:#ad8b86}.bt-glass:after{content:"";position:absolute;top:188px;left:25px;width:57px;height:1px;background:#ad8b86}.orbit-label{position:absolute;z-index:1;background:var(--bt-paper);padding:5px 10px;font:10px/1.3 system-ui;letter-spacing:2px;color:#8b7874}.orbit-label.top{top:-12px;left:117px}.orbit-label.left{left:-39px;top:167px}.orbit-label.bottom{right:10px;bottom:27px}.orbit-dot{position:absolute;width:9px;height:9px;background:#aab19a;right:28px;top:58px;border-radius:50%}.bt-learning-bar{margin:0 38px;padding:24px 32px;border-block:1px solid var(--bt-line);display:flex;align-items:center;gap:55px;background:#f3f1eb}.bt-learning-bar>div{display:grid;grid-template-columns:auto auto;gap:4px 20px}.bt-learning-bar small{color:var(--bt-muted);font-size:11px}.bt-learning-bar strong{font-size:19px;font-weight:500;grid-column:1}.bt-learning-bar span{font-size:11px;align-self:center;color:var(--bt-muted)}.bt-learning-bar>a{font-size:12px;margin-left:auto}.bt-section{padding:68px 38px}.bt-section-title h2{font-family:"Yu Mincho",serif;font-weight:500;font-size:27px;margin:0 0 8px}.bt-section-title .bt-eyebrow{margin-bottom:9px}.bt-section-title>p:last-child{font-size:13px;color:var(--bt-muted);margin-bottom:30px}.bt-tool-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.bt-tool-card{display:block;padding:26px 30px 22px;border:1px solid var(--bt-line);border-radius:12px;color:var(--bt-ink);text-decoration:none;background:#fffdf8;transition:transform .18s,border-color .18s}.bt-tool-card:hover{transform:translateY(-3px);border-color:#b4919b}.bt-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.bt-card-top>span{font:30px/1 Georgia,serif;color:#ac9d95}.bt-card-top small{font:9px/1.5 system-ui;letter-spacing:2px;color:#746c6e}.bt-tool-card .bt-eyebrow{font-size:10px;margin-bottom:7px;letter-spacing:2px}.bt-tool-card h3{font:500 22px/1.6 "Yu Mincho",serif;margin:0 0 13px}.bt-tool-card>p:not(.bt-eyebrow){font-size:13px;line-height:1.95;color:var(--bt-muted);max-width:410px}.bt-card-bottom{margin-top:25px;padding-top:16px;border-top:1px solid #ebe6de;display:flex;align-items:center;justify-content:space-between;font-size:11px;color:#716562}.bt-card-bottom b{font-size:20px;font-weight:400;color:var(--bt-wine)}.bt-pro-strip{margin:0 38px 70px;padding:35px 40px;border-radius:12px;background:#542f40;display:flex;align-items:center;justify-content:space-between;gap:30px;color:#fffaf2}.bt-pro-strip .bt-eyebrow{color:#d6bdab}.bt-pro-strip h2{font:500 26px/1.6 "Yu Mincho",serif;margin:0 0 12px}.bt-pro-strip p:not(.bt-eyebrow){color:#d9c9ce;font-size:13px}.bt-pro-strip a{white-space:nowrap}.bt-footer{max-width:1220px;margin:30px auto 0;padding:28px 38px;display:flex;gap:30px;flex-wrap:wrap;border-top:1px solid var(--bt-line);font-size:11px;color:var(--bt-muted)}.bt-footer a{color:inherit}.bt-footer a:first-child{margin-right:auto;letter-spacing:2px}.bt-content{max-width:1120px;margin:auto;padding:38px 30px 70px}.bt-page-hero{padding:22px 0 35px}.bt-page-hero h1{font:500 clamp(27px,3vw,40px)/1.6 "Yu Mincho",serif;letter-spacing:.05em;margin:0 0 14px}.bt-page-hero>p:last-child{color:var(--bt-muted)}.bt-panel{border:1px solid var(--bt-line);border-radius:var(--bt-radius);background:#fffdf8;padding:30px;margin-bottom:25px}.bt-panel h2{font-size:23px;font-weight:500;margin:0 0 15px}.bt-panel h3{font-size:17px;margin:25px 0 12px}.bt-panel p,.bt-panel li,.bt-panel dd{font-size:14px}.bt-panel>button,.bt-actions>button,.bt-hints>button,.bt-record button,.bt-saved-record button{border:1px solid #c6b5ba;border-radius:7px;padding:9px 16px;background:#fff;color:var(--bt-wine)}.bt-panel>button.bt-button,.bt-actions>button.bt-button{background:var(--bt-wine);color:white}.bt-field{display:flex;flex-direction:column;gap:7px;margin:17px 0;font-size:13px;font-weight:600}.bt-field input,.bt-field select,.bt-field textarea{width:100%;border:1px solid #cfc5c3;border-radius:7px;background:white;color:var(--bt-ink);padding:11px 12px;min-height:44px}.bt-field textarea{min-height:90px}.bt-checkbox{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.7;margin:20px 0}.bt-checkbox input{width:18px;height:18px;flex-shrink:0;margin-top:3px;accent-color:var(--bt-wine)}.bt-tabs{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 26px;border-bottom:1px solid var(--bt-line);padding-bottom:14px}.bt-tabs button,.bt-tabs a{font-size:12px;padding:9px 15px;border:1px solid #e0d7d2;border-radius:30px;background:white;color:var(--bt-wine);text-decoration:none}.bt-tabs button:hover,.bt-tabs a:hover{background:#ede5e8}.bt-notice{border-left:3px solid #a37548;border-radius:4px;background:#f2ebe1;color:#5f4b3c;padding:15px 20px;font-size:14px;overflow-wrap:anywhere}.bt-loading{text-align:center;padding:100px 20px;color:var(--bt-muted)}.bt-price-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:23px}.bt-pro-card{border-color:#b48e9e;background:#fbf6f5}.bt-price{font:500 30px/1.5 system-ui!important;color:var(--bt-wine);margin:20px 0}.bt-definition{display:grid;grid-template-columns:120px 1fr;gap:16px 24px}.bt-definition dt{font-weight:600;font-size:13px}.bt-definition dd{margin:0}.bt-recovery-card{background:#f0ece4;padding:22px;border-radius:12px;margin:25px 0}.bt-recovery-card h3{margin-top:0}.bt-recovery-code{display:block;font-family:ui-monospace,monospace;font-size:17px;overflow-wrap:anywhere;background:white;border:1px solid #d7cbbd;border-radius:6px;padding:18px;user-select:all}.bt-delete{margin-top:35px;border-top:1px solid var(--bt-line);padding-top:20px}.bt-delete summary{color:#79464d;cursor:pointer}.bt-link-button{border:0;background:transparent;color:var(--bt-wine);text-decoration:underline;padding:0}.bt-upload{border:1px solid #c6b5ba;border-radius:7px;padding:8px 16px;font-size:13px}.bt-upload input{display:block;max-width:240px;margin-top:5px}.bt-record{display:flex;align-items:center;justify-content:space-between;gap:15px;width:100%;margin:10px 0;border:1px solid var(--bt-line);padding:14px 17px;border-radius:8px;background:white;text-align:left;font-size:13px}.bt-record span{color:var(--bt-muted)}.bt-saved-record{border:1px solid var(--bt-line);padding:16px;border-radius:8px;margin:12px 0}.bt-saved-record summary{cursor:pointer}.bt-saved-record pre,.bt-account pre{white-space:pre-wrap;overflow-wrap:anywhere;font:13px/1.8 system-ui,sans-serif;background:#f3f0e9;padding:15px;border-radius:8px;max-height:550px;overflow:auto}.bt-stats{display:flex;gap:30px;margin-top:28px}.bt-stats span{font-size:11px;color:var(--bt-muted)}.bt-stats strong{font:30px Georgia,serif;color:var(--bt-wine);display:block}.bt-filter-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 20px}.bt-question-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.bt-question-card{border:1px solid var(--bt-line);border-radius:10px;padding:19px;text-decoration:none;color:var(--bt-ink);display:flex;flex-direction:column;gap:5px}.bt-question-card h3{font-size:16px;line-height:1.6;margin:3px 0 7px}.bt-question-card p{font-size:12px;margin:0}.bt-question-card small,.bt-question-card span{font-size:10px;color:var(--bt-muted)}.bt-question-card b{font-size:11px;margin-top:12px;color:var(--bt-wine)}.bt-rank-list{display:grid;grid-template-columns:repeat(5,1fr);gap:15px}.bt-rank-list>div{border-top:1px solid var(--bt-line);padding-top:14px;display:flex;flex-direction:column;gap:7px;font-size:12px}.bt-rank-list b{font:22px Georgia;color:#a79787}.bt-rank-list strong{font-size:15px;color:var(--bt-wine)}.bt-bar-list>div{display:grid;grid-template-columns:minmax(90px,170px) 1fr 50px;align-items:center;gap:12px;margin:11px 0;font-size:12px}.bt-bar-list i{display:block;height:13px;background:#a7858e;border-radius:2px}.bt-bar-list b{font-size:12px}.bt-subheading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:12px 0 24px}.bt-subheading h1{font:500 32px/1.6 "Yu Mincho",serif;margin:0 0 12px}.bt-subheading p:last-child{font-size:13px;color:var(--bt-muted)}.bt-guide .bt-panel{padding:30px}.bt-guide.app-shell{padding-top:35px}.bt-hints{border-block:1px solid var(--bt-line);padding:22px 0;margin:25px 0}.bt-hints p{font-size:14px}.bt-guide .guide-step-card h2{font-size:29px}.bt-guide .coach{margin:20px 0}.bt-guide .coach>div{margin-top:15px}.bt-guide .coach h3{margin:0}.bt-guide .coach p{font-size:13px}.bt-guide .output-panel{margin:20px 0}.bt-guide .output-panel h3{margin-top:0}.bt-guide .output-panel>button{font:13px system-ui;padding:8px 15px;border:1px solid #c9b8bc;border-radius:6px;background:white;color:var(--bt-wine)}
@media (max-width:1050px){.bt-header{flex-wrap:wrap;gap:18px;padding:18px 25px}.bt-header nav{order:3;width:100%;flex:auto;justify-content:flex-start;overflow-x:auto;padding-top:10px;border-top:1px solid var(--bt-line)}.bt-account-nav{margin-left:auto}.bt-hero{gap:25px;padding-top:50px}.bt-orbit{width:260px;height:260px}.bt-glass{left:75px;top:32px}.orbit-label.top{left:85px}.orbit-label.left{top:139px}.bt-learning-bar{gap:30px}.bt-pro-strip{padding:30px}.bt-price-grid{grid-template-columns:1fr 1fr}}@media (max-width:700px){body{font-size:14px}.bt-header{padding:15px 18px}.bt-brand{font-size:18px;gap:8px}.bt-mark{width:35px;height:35px;font-size:17px}.bt-account-nav{gap:9px;font-size:10px}.bt-account-nav .bt-small-button{display:none}.bt-header nav{gap:25px}.bt-plan-note{display:block;padding:12px 19px;font-size:11px}.bt-plan-note a{display:block;margin-top:6px}.bt-hero{padding:45px 23px 35px;gap:0;display:block;position:relative;overflow:hidden}.bt-hero h1{font-size:32px;position:relative;z-index:1}.bt-hero .bt-orbit{display:none}.bt-hero .bt-lead{font-size:13px}.bt-actions{gap:12px}.bt-learning-bar{margin:0 23px;padding:18px;gap:25px;flex-wrap:wrap}.bt-learning-bar>div{display:block}.bt-learning-bar small,.bt-learning-bar strong,.bt-learning-bar span{display:block}.bt-learning-bar>a{margin-left:0;width:100%}.bt-section{padding:42px 23px}.bt-tool-grid{grid-template-columns:1fr;gap:16px}.bt-tool-card{padding:23px}.bt-card-top{margin-bottom:22px}.bt-tool-card h3{font-size:21px}.bt-pro-strip{margin:0 23px 45px;padding:26px;display:block}.bt-pro-strip h2{font-size:22px}.bt-pro-strip a{margin-top:15px}.bt-footer{padding:23px;gap:13px}.bt-footer a:first-child{width:100%;margin:0 0 10px}.bt-content{padding:27px 18px 40px}.bt-panel{padding:23px 18px;border-radius:12px}.bt-panel h2{font-size:21px}.bt-price-grid{grid-template-columns:1fr;gap:0}.bt-definition{grid-template-columns:1fr;gap:6px}.bt-definition dd{margin-bottom:12px}.bt-filter-grid{grid-template-columns:1fr 1fr;gap:0 12px}.bt-question-grid{grid-template-columns:1fr}.bt-rank-list{grid-template-columns:1fr}.bt-rank-list>div{display:grid;grid-template-columns:20px 1fr 50px;align-items:center}.bt-stats{gap:23px}.bt-recovery-card{padding:16px}.bt-recovery-code{font-size:14px}.bt-record{align-items:flex-start;flex-direction:column}.bt-subheading{display:block}.bt-subheading h1{font-size:27px}.bt-guide.app-shell{padding-inline:18px}.bt-guide .bt-panel{padding:22px 17px}.bt-guide .guide-step-card__body{padding:20px 16px}.bt-tabs{gap:7px}.bt-tabs button,.bt-tabs a{padding:8px 11px;font-size:11px}.bt-bar-list>div{grid-template-columns:100px 1fr 40px;gap:8px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media print{.bt-header,.bt-footer,.bt-tabs,.bt-plan-note,.bt-actions,button,.bt-recovery-card{display:none!important}body{background:white}.bt-panel{border:0}.bt-content{padding:0}.bt-saved-record pre{max-height:none}}

/* Keep form controls and user records within narrow viewports. */
.bt-price-grid>*,.bt-tool-grid>*,.bt-question-grid>*,.bt-filter-grid>*,.bt-definition>*,.bt-actions>*,.bt-header>*{min-width:0}.bt-upload{max-width:100%}.bt-upload input{width:100%;min-width:0}.bt-record,.bt-question-card,.bt-saved-record{overflow-wrap:anywhere}