:root{--paper:#f6f7f3;--white:#fff;--ink:#25352f;--muted:#748079;--line:#e0e5df;--green:#285546;--pale:#edf2ec;--sand:#f3efe5;--red:#a14f40;--radius:10px;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;font-size:15px;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button{color:inherit}a{color:var(--green)}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #8cae98;outline-offset:4px}button{border:0;background:none}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}h1,h2,h3,p{margin:0}h1{font-size:30px;line-height:1.5;letter-spacing:.015em;font-weight:650}h2{font-size:18px;font-weight:650}h3{font-size:16px;font-weight:600}p{line-height:1.9}small,.small{font-size:12px}.muted{color:var(--muted)}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}.skip{position:fixed;top:-80px;left:20px;z-index:99;padding:12px;background:white}.skip:focus{top:12px}.sidebar{position:fixed;left:0;top:0;width:224px;height:100dvh;background:#fbfcf9;border-right:1px solid var(--line);padding:36px 24px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:650;letter-spacing:.05em;text-decoration:none}.brand-icon{display:grid;place-items:center;width:32px;height:37px;background:var(--green);color:white;border-radius:4px}.brand-icon svg{width:22px;height:24px}.course-label{padding:30px 10px 26px}.course-label strong{display:block;font-size:14px;font-weight:600;line-height:1.8}.course-label span{display:block;font-size:12px;color:var(--muted);margin-top:4px}.nav{display:grid;gap:6px}.nav button{display:flex;align-items:center;gap:12px;text-align:left;min-height:48px;padding:12px 14px;border-radius:6px;font-size:14px;color:#65716b}.nav button:hover{background:var(--pale)}.nav button.active{background:#e9efE7;color:var(--green);font-weight:650}.nav-count{margin-left:auto;font-size:11px;min-width:20px;background:#fff;border-radius:4px;padding:2px 5px;text-align:center}.side-foot{margin-top:auto;border-top:1px solid var(--line);padding:21px 8px 0;font-size:11px;line-height:1.9;color:var(--muted)}.side-foot span{display:block}.shell{margin-left:224px;min-height:100dvh}.topbar{height:79px;border-bottom:1px solid var(--line);padding:0 44px;display:flex;align-items:center;justify-content:space-between;background:var(--paper);gap:12px}.breadcrumb{color:var(--muted);font-size:12px;display:flex;gap:11px;align-items:center}.breadcrumb b{color:var(--ink);font-weight:500}.top-actions{display:flex;align-items:center;gap:14px}.prototype-tag{font-size:10px;letter-spacing:.08em;display:inline-block;border:1px solid #d7dfd3;border-radius:4px;color:#6b7c6a;padding:5px 8px}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--line);border-radius:50%;background:transparent}.icon-button:hover{background:#e8eee6}.icon-button.saved{color:var(--green);background:var(--pale);border-color:#aabfae}.icon-button.saved svg{fill:#d0dfcf}.main{max-width:1140px;margin:0 auto;padding:43px 44px 60px}.page-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:29px}.eyebrow{display:block;letter-spacing:.16em;font-size:10px;color:#86917f;margin-bottom:10px;font-weight:600}.intro{margin-top:10px;color:var(--muted);font-size:13px}.date{font-size:11px;color:var(--muted);white-space:nowrap;padding-bottom:5px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(230px,1fr);gap:20px}.start-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:31px 32px 27px;position:relative;overflow:hidden}.start-panel .section-kicker{font-size:11px;letter-spacing:.08em;color:var(--green);display:flex;align-items:center;gap:8px}.start-panel .section-kicker:before{content:'';width:5px;height:5px;border-radius:50%;background:var(--green)}.start-panel h2{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:27px;line-height:1.6;font-weight:500;margin:16px 0 8px;letter-spacing:.06em}.start-panel p{font-size:12px;color:var(--muted)}.start-actions{display:flex;gap:14px;align-items:center;margin-top:28px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:46px;padding:12px 21px;border-radius:6px;font-size:13px;font-weight:550;border:1px solid var(--line);background:var(--white);text-decoration:none}.btn.primary{background:var(--green);border-color:var(--green);color:white}.btn.primary:hover{background:#1c4235}.btn:hover{border-color:#94ad96}.btn svg{width:17px;height:17px}.text-button{display:inline-flex;gap:7px;align-items:center;color:var(--muted);font-size:12px;min-height:44px;padding:6px}.text-button:hover{color:var(--green)}.progress-panel{border-radius:var(--radius);border:1px solid var(--line);padding:26px;background:#f0f3ec;display:flex;flex-direction:column;align-items:center;justify-content:center}.progress-panel h3{align-self:flex-start;font-size:12px;font-weight:500}.progress-ring{width:119px;height:119px;margin:19px auto 14px;position:relative}.progress-ring svg{width:119px;height:119px;transform:rotate(-90deg);stroke-width:5}.progress-ring .track{stroke:#dfe6d9}.progress-ring .fill{stroke:var(--green);stroke-dasharray:326.73;stroke-linecap:round;transition:stroke-dashoffset .3s}.progress-ring .ring-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring-text strong{font-size:29px;font-weight:500;letter-spacing:-.04em}.ring-text small{color:var(--muted);font-size:10px;margin-top:2px}.progress-caption{font-size:11px;color:var(--muted)}.stats-strip{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line);padding:22px 0 24px;margin-bottom:32px}.stat{padding:0 24px;border-right:1px solid var(--line);display:flex;align-items:baseline;gap:12px}.stat:first-child{padding-left:0}.stat:last-child{border:0}.stat>span{color:var(--muted);font-size:11px}.stat strong{font-size:23px;font-weight:500}.stat small{font-size:10px;color:var(--muted);margin-left:4px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.section-head h2{font-size:15px}.section-head .small{color:var(--muted);font-size:11px}.subject-table{border-top:1px solid var(--line)}.subject-row{width:100%;display:grid;grid-template-columns:31px minmax(150px,1fr) minmax(100px,180px) 65px 18px;align-items:center;gap:17px;padding:20px 5px;border-bottom:1px solid var(--line);text-align:left}.subject-row:hover{background:#eef2eb}.subject-index{font-size:11px;color:#8d988c}.subject-title{font-size:13px}.subject-title small{display:block;font-size:10px;color:var(--muted);margin-top:7px}.bar{height:4px;overflow:hidden;border-radius:2px;background:#e1e7dd}.bar span{display:block;height:100%;background:#6c8c6e;border-radius:2px}.subject-ratio{font-size:11px;color:var(--muted);text-align:right}.subject-row>svg{width:15px;color:#8d998b}.modes-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:29px}.mode-box{display:flex;text-align:left;align-items:center;gap:17px;padding:23px;background:white;border:1px solid var(--line);border-radius:8px;min-width:0}.mode-box:hover{border-color:#94ad96}.mode-box>svg:first-child{width:25px;height:25px;color:#56765d}.mode-box strong{font-size:13px;font-weight:550;display:block}.mode-box small{display:block;color:var(--muted);font-size:11px;margin-top:8px;line-height:1.7}.mode-box .arrow{margin-left:auto;width:16px}.sample-note{font-size:11px;color:#879083;margin-top:27px;line-height:1.9;display:flex;gap:8px;align-items:flex-start}.sample-note svg{width:14px;height:14px;margin-top:3px}.panel{background:white;border:1px solid var(--line);border-radius:10px;padding:28px}.panel+.panel{margin-top:20px}.form-row{display:grid;gap:10px;margin-bottom:25px}.form-row>label,.label{font-size:12px;font-weight:550}.select,input[type=search],input[type=date]{width:100%;min-height:46px;border:1px solid #d6ddd4;background:white;padding:11px 13px;border-radius:6px;color:var(--ink)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.segments{display:flex;gap:8px;flex-wrap:wrap}.segment{font-size:12px;padding:10px 15px;min-height:42px;border:1px solid var(--line);border-radius:5px;background:white}.segment[aria-pressed=true]{border-color:var(--green);background:var(--pale);color:var(--green)}.check-row{display:flex;align-items:center;gap:10px;font-size:12px;min-height:40px;line-height:1.7}.check-row input{width:17px;height:17px;accent-color:var(--green);flex-shrink:0}.form-footer{border-top:1px solid var(--line);padding-top:22px;display:flex;align-items:center;gap:16px;justify-content:space-between}.form-footer .muted{font-size:11px}.notice{background:var(--sand);padding:14px 16px;border-radius:5px;font-size:12px;color:#796e52;line-height:1.9;margin:18px 0}.exam-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:24px 0;margin:18px 0;border-block:1px solid var(--line)}.exam-facts strong{font-size:28px;font-weight:500}.exam-facts small{font-size:12px;color:var(--muted);margin-left:5px}.exam-facts span{display:block;font-size:11px;color:var(--muted);margin-top:7px}.exam-allocation{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0}.chip{background:#f0f3ed;border:1px solid #e1e7dc;border-radius:4px;color:#62765f;font-size:10px;padding:5px 8px}.empty{padding:46px 24px;text-align:center;border:1px dashed #d7dfd2;border-radius:8px}.empty>svg{width:35px;height:35px;color:#879e83;margin-bottom:17px}.empty h3{font-size:16px;margin-bottom:10px}.empty p{font-size:12px;color:var(--muted);max-width:340px;margin:0 auto 22px}.search-wrap{margin-bottom:20px}.list-row{display:flex;align-items:center;gap:15px;border-bottom:1px solid var(--line);padding:19px 0}.list-row .row-content{flex:1;min-width:0;text-align:left}.list-row .row-content strong{display:block;font-size:13px;line-height:1.8;font-weight:500}.list-row small{color:var(--muted);font-size:11px}.list-row .icon-button{flex-shrink:0}.tabs-inline{display:flex;gap:20px;border-bottom:1px solid var(--line);margin-bottom:24px}.tabs-inline button{font-size:13px;min-height:47px;border-bottom:2px solid transparent;padding:0 4px}.tabs-inline button[aria-selected=true]{border-color:var(--green);color:var(--green)}.quiz-wrap{max-width:830px;margin:0 auto}.quiz-top{display:flex;align-items:center;gap:15px;justify-content:space-between;margin-bottom:19px}.quiz-top .text-button{font-size:11px}.quiz-progress{flex:1;max-width:200px}.quiz-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:23px}.question-count{font-size:12px;letter-spacing:.05em;color:var(--muted)}.timer{background:#e9efe4;color:var(--green);border-radius:5px;padding:8px 12px;font-size:14px;white-space:nowrap}.timer.low{background:#fbebe4;color:var(--red)}.question-panel{padding:31px 34px 30px}.question-text{font-size:18px;line-height:1.95;font-weight:550;margin-bottom:27px;white-space:pre-wrap;overflow-wrap:anywhere}.choices{display:grid;gap:11px}.choice{display:flex;align-items:flex-start;gap:14px;text-align:left;width:100%;padding:17px 18px;border:1px solid #dce2d9;border-radius:6px;font-size:14px;line-height:1.85;background:white;opacity:1!important}.choice-letter{display:grid;place-items:center;width:25px;height:25px;border:1px solid #e0e5dc;border-radius:4px;font-size:11px;flex-shrink:0;margin-top:2px;color:#85917f;font-family:ui-monospace,monospace}.choice.selected{border-color:#477557;background:#f1f5ed}.choice.selected .choice-letter{background:var(--green);color:white;border-color:var(--green)}.choice.correct{border-color:#60835d;background:#f1f6ed}.choice.wrong{border-color:#c08b7a;background:#faf1ed}.choice-indicator{font-size:11px;margin-left:auto;white-space:nowrap;font-weight:600}.quiz-bottom{margin-top:25px;display:flex;justify-content:space-between;gap:12px;align-items:center}.quiz-bottom .btn{min-width:150px}.quiz-help{text-align:center;font-size:10px;color:#929b8e;margin-top:20px}.explanation{margin-top:22px;border-top:1px solid var(--line);padding-top:25px}.answer-status{display:flex;align-items:center;gap:8px;color:var(--green);font-size:16px;font-weight:600;margin-bottom:14px}.answer-status.wrong{color:var(--red)}.explanation>p{font-size:13px;white-space:pre-wrap;line-height:2}.explanation details{margin-top:18px;font-size:12px;color:#687563;line-height:1.9}.explanation summary{cursor:pointer;min-height:32px}.source-note{font-size:10px!important;color:var(--muted);margin-top:17px}.question-map{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px}.map-button{width:36px;height:36px;min-height:36px;border:1px solid var(--line);border-radius:4px;font:12px ui-monospace,monospace;background:white;position:relative}.map-button.answered{background:#e9f0e3;border-color:#c6d4bc;color:var(--green)}.map-button.current{border:2px solid var(--green)}.map-button.marked:after{content:'';position:absolute;right:3px;top:3px;width:5px;height:5px;border-radius:50%;background:#ad8d48}.exam-tools{margin-top:22px;padding-top:19px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}.result-score{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:8px 0 25px;border-bottom:1px solid var(--line);margin-bottom:24px}.result-score .big-number{font-size:60px;font-weight:400;letter-spacing:-.07em}.result-score .of{font-size:19px;color:var(--muted);margin-left:8px}.result-badge{font-size:12px;color:var(--green);background:var(--pale);padding:9px 12px;border-radius:5px}.result-badge.not-passed{background:var(--sand);color:#826d45}.score-row{display:flex;align-items:center;gap:16px;padding:13px 0;font-size:12px}.score-row>span:first-child{flex:1}.score-row .bar{flex:1}.result-actions{display:flex;gap:12px;margin-top:25px;flex-wrap:wrap}.result-answer{font-size:11px;color:var(--muted);display:block;margin-top:5px}.status-dot{width:8px;height:8px;border-radius:50%;background:#78936c;flex-shrink:0}.status-dot.wrong{background:#b78d6c}.history-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:17px 0;border-bottom:1px solid var(--line);font-size:12px}.history-row small{display:block;color:var(--muted);font-size:10px;margin-top:5px}.history-row .score{font-size:18px}.setting-row{padding:20px 0;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:18px}.setting-row:first-child{padding-top:0}.setting-row strong{font-size:13px;font-weight:550;display:block}.setting-row p{font-size:11px;color:var(--muted);margin-top:5px}.setting-row button{flex-shrink:0}.about{font-size:12px;line-height:2;color:var(--muted)}.about a{font-size:11px}.month-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:20px}.day{background:#f1f3ee;border-radius:5px;min-height:58px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;font-size:10px;color:var(--muted)}.day.active{background:#e2ebd9;color:var(--green)}.day strong{font-size:16px;font-weight:500}.mobile-nav{display:none}dialog{border:1px solid var(--line);border-radius:12px;padding:29px;max-width:430px;width:calc(100% - 40px);color:var(--ink);background:#fff}dialog::backdrop{background:#142e2580}dialog h2{font-size:19px;margin-bottom:15px}dialog p{font-size:13px;color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:25px;flex-wrap:wrap}#toast{position:fixed;bottom:27px;left:calc(50% + 100px);transform:translateX(-50%);background:#2a4237;color:white;padding:12px 22px;border-radius:6px;font-size:12px;z-index:80;opacity:0;pointer-events:none;transition:opacity .2s;max-width:90vw;line-height:1.8}#toast.visible{opacity:1}.large-text .question-text{font-size:21px}.large-text .choice{font-size:17px}.large-text .explanation>p{font-size:16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
/* Shared sizing rules: content wraps naturally; touch targets stay usable. */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:88px}
body{min-width:0}
main,.shell,.main,.hero-grid,.start-panel,.progress-panel,.panel,.form-grid,.form-row,.subject-title,.quiz-wrap,.quiz-meta,.choice>span:nth-child(2),.setting-row>div,.mode-box>span{min-width:0}
button,a,p,h1,h2,h3,summary,.chip,.row-content{overflow-wrap:anywhere}
button,input,select{max-width:100%}
.icon-button{width:44px;height:44px}
.btn,.segment,.tabs-inline button,.text-button{min-height:44px}
.check-row{min-height:44px}
.choice>span:nth-child(2){flex:1}
.stat{flex-wrap:wrap;column-gap:12px;row-gap:8px}
.select,input[type=search],input[type=date]{font-size:16px}
.question-map{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:8px}
.map-button{width:100%;height:44px;min-height:44px;font-size:13px}
.source-note,.sample-note{overflow-wrap:anywhere}
.sidebar{overflow-y:auto}
.side-foot{padding-bottom:env(safe-area-inset-bottom)}
#toast{width:max-content;max-width:min(480px,calc(100vw - 32px))}
dialog{max-height:calc(100dvh - 40px);overflow-y:auto;overscroll-behavior:contain}
.dialog-actions>.btn{flex:1;min-width:120px}

/* PC: full navigation and a comfortably bounded reading column. */
@media(min-width:1200px){
 .sidebar{width:224px;padding:34px 24px}
 .shell{margin-left:224px}
 .topbar{height:76px;padding-inline:40px}
 .main{max-width:1180px;padding:40px 40px 64px}
 .hero-grid{grid-template-columns:minmax(0,1.75fr) minmax(240px,1fr)}
 .mobile-nav{display:none}
 .question-text{font-size:20px}
 .choice{font-size:16px;min-height:60px}
 .explanation>p{font-size:15px}
}
@media(min-width:1600px){
 .sidebar{width:246px;padding-inline:31px}
 .shell{margin-left:246px}
 .main{padding-top:52px}
}

/* Tablet, in either orientation: a narrow navigation rail, room for the text. */
@media(min-width:600px) and (max-width:1199px){
 .sidebar{display:none}
 .shell{margin-left:88px}
 .topbar{height:72px;padding-inline:28px}
 .breadcrumb{font-size:12px;gap:9px}
 .breadcrumb>span:first-child,.breadcrumb>span:nth-child(2){display:inline}
 .top-actions{gap:10px}
 .prototype-tag{font-size:10px}
 .main{max-width:1040px;padding:32px 28px 56px}
 .page-head{margin-bottom:26px;align-items:flex-start}
 h1{font-size:29px}
 .intro{font-size:14px}
 .date{font-size:11px;display:block}
 .hero-grid{grid-template-columns:minmax(0,1.6fr) minmax(200px,1fr);gap:18px}
 .start-panel{padding:27px 25px}
 .start-panel p{font-size:13px}
 .start-actions{gap:12px;margin-top:24px}
 .start-actions .btn{padding:12px 18px;font-size:14px}
 .text-button{font-size:13px}
 .progress-panel{padding:24px;flex-direction:column}
 .progress-panel h3{font-size:13px}
 .progress-caption{font-size:12px}
 .stats-strip{padding:24px 0;margin-bottom:30px}
 .stat{display:block;padding-inline:22px}
 .stat>span{display:block;font-size:12px;margin-bottom:10px}
 .stat strong{font-size:26px}
 .stat small{font-size:12px}
 .subject-row{grid-template-columns:26px minmax(0,1fr) minmax(70px,130px) 54px 18px;gap:13px;padding:20px 4px}
 .subject-title{font-size:14px}
 .subject-title small,.subject-ratio{font-size:12px}
 .section-head h2{font-size:17px}
 .section-head .small{font-size:12px}
 .modes-grid{grid-template-columns:1fr 1fr;gap:18px}
 .mode-box{padding:23px 20px}
 .mode-box strong{font-size:14px;line-height:1.7}
 .mode-box small{font-size:12px}
 .mode-box .arrow{display:none}
 .panel{padding:28px}
 .form-row>label,.label{font-size:14px}
 .form-grid{grid-template-columns:1fr 1fr;gap:22px}
 .segment,.check-row,.btn{font-size:14px}
 .form-footer .muted{font-size:12px}
 .question-panel{padding:30px}
 .question-text{font-size:20px}
 .choice{font-size:16px;min-height:60px;padding:18px}
 .choice-indicator{font-size:12px}
 .explanation>p{font-size:15px}
 .quiz-top{gap:14px}
 .quiz-top .text-button{font-size:12px}
 .question-count{font-size:13px}
 .quiz-progress{max-width:150px}
 .chip{font-size:12px}
 .source-note{font-size:11px!important}
 .quiz-help{display:block}
 .sample-note{font-size:12px}
 .mobile-nav{position:fixed;inset:0 auto 0 0;width:88px;display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:10px;padding:26px 10px;background:#fbfcf9;border:0;border-right:1px solid var(--line);z-index:25;overflow-y:auto;backdrop-filter:none}
 .mobile-nav:before{content:'資格note';color:var(--green);text-align:center;font-size:11px;font-weight:650;letter-spacing:.025em;padding:8px 0 24px}
 .mobile-nav button{width:100%;min-width:0;min-height:72px;padding:12px 3px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;font-size:11px;color:#65716b;border-radius:7px}
 .mobile-nav svg{width:23px;height:23px}
 .mobile-nav button.active{background:#e9efe7;color:var(--green);font-weight:650}
 #toast{left:calc(50% + 44px);bottom:24px}
}
@media(min-width:600px) and (max-width:719px){
 .main{padding-inline:24px}
 .topbar{padding-inline:24px}
 .breadcrumb>span:first-child,.breadcrumb>span:nth-child(2){display:none}
 .date{display:none}
 .hero-grid{grid-template-columns:1fr}
 .progress-panel{padding:18px 22px;display:grid;grid-template-columns:1fr 80px 1fr;gap:18px;align-items:center}
 .progress-panel h3{align-self:center}
 .progress-ring{width:80px;height:80px;margin:0}
 .progress-ring svg{width:80px;height:80px}
 .ring-text strong{font-size:25px}
 .progress-caption{font-size:12px}
 .subject-row{grid-template-columns:24px minmax(0,1fr) 48px 16px;gap:10px}
 .subject-row .bar{display:none}
 .modes-grid,.form-grid{grid-template-columns:1fr}
 .form-grid{gap:0}
 .mode-box .arrow{display:block}
 .form-footer{flex-wrap:wrap}
 .form-footer>.btn{width:100%}
 .stats-strip .stat{padding-inline:15px}
 .setting-row{flex-wrap:wrap}
 .setting-row>div:first-child{flex:1 1 220px}
}

/* Phone: one column, thumb-friendly bottom navigation, readable question text. */
@media(max-width:599px){
 html{scroll-padding-top:78px}
 .sidebar{display:none}
 .shell{margin-left:0}
 .topbar{height:64px;padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left));gap:8px;position:sticky;top:0;z-index:22}
 .breadcrumb{font-size:12px;gap:0;flex:1;min-width:0;line-height:1.5}
 .breadcrumb b{font-size:12px}
 .breadcrumb>span{display:none}
 .top-actions{gap:6px;flex-shrink:0}
 .prototype-tag{font-size:9px;letter-spacing:0;padding:4px 5px}
 .top-actions .icon-button{width:44px;height:44px}
 .top-actions .icon-button svg{width:19px}
 .main{padding:26px max(16px,env(safe-area-inset-right)) calc(104px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
 .page-head{align-items:flex-start;gap:12px;margin-bottom:24px}
 h1{font-size:26px;line-height:1.55}
 .eyebrow{font-size:10px;margin-bottom:8px}
 .intro{font-size:13px;line-height:1.9;margin-top:10px}
 .date{display:none}
 .hero-grid{grid-template-columns:1fr;gap:16px}
 .start-panel{padding:26px 22px}
 .start-panel h2{font-size:28px;margin-top:15px}
 .start-panel .section-kicker{font-size:12px}
 .start-panel p{font-size:13px}
 .start-actions{gap:12px;margin-top:24px}
 .start-actions .btn{flex:1 1 150px;min-height:50px;font-size:14px;padding-inline:18px}
 .start-actions .text-button{font-size:12px}
 .progress-panel{display:grid;grid-template-columns:minmax(0,1fr) 74px minmax(0,1fr);align-items:center;gap:14px;padding:18px 20px}
 .progress-panel h3{align-self:center;font-size:12px;line-height:1.8}
 .progress-ring{width:74px;height:74px;margin:0}
 .progress-ring svg{width:74px;height:74px}
 .ring-text strong{font-size:23px}
 .ring-text small{font-size:9px}
 .progress-caption{max-width:none;font-size:11px;line-height:1.8}
 .stats-strip{padding:23px 0;margin-bottom:28px}
 .stat{display:block;padding-inline:12px}
 .stat>span{display:block;font-size:11px;line-height:1.7;margin-bottom:8px}
 .stat strong{font-size:25px}
 .stat small{font-size:11px;margin-left:3px}
 .section-head{align-items:flex-start;gap:14px;margin-bottom:14px}
 .section-head h2{font-size:16px;white-space:nowrap}
 .section-head .small{font-size:11px;line-height:1.7}
 .subject-row{grid-template-columns:24px minmax(0,1fr) 48px 16px;gap:10px;padding:20px 2px}
 .subject-row .bar{display:none}
 .subject-title{font-size:14px;line-height:1.7}
 .subject-title small,.subject-ratio{font-size:11px}
 .modes-grid{grid-template-columns:1fr;gap:12px;margin-top:26px}
 .mode-box{padding:22px 20px;gap:15px}
 .mode-box strong{font-size:14px;line-height:1.8}
 .mode-box small{font-size:12px;line-height:1.8;margin-top:5px}
 .mode-box .arrow{display:block}
 .sample-note{font-size:11px;line-height:1.9;margin-top:24px}
 .panel{padding:24px 20px}
 .form-grid{grid-template-columns:1fr;gap:0}
 .form-row{margin-bottom:24px}
 .form-row>label,.label{font-size:14px}
 .segments{gap:8px}
 .segment{font-size:13px;padding:11px 14px}
 .check-row{font-size:13px}
 .form-footer{flex-wrap:wrap;gap:15px}
 .form-footer .muted{font-size:12px;line-height:1.8}
 .form-footer>.btn{width:100%;font-size:14px;min-height:50px}
 .exam-facts{gap:10px;margin:20px 0;padding:24px 0}
 .exam-facts>div{min-width:0}
 .exam-facts strong{font-size:27px}
 .exam-facts small{font-size:11px;margin-left:3px;white-space:nowrap}
 .exam-facts span{font-size:11px;line-height:1.8}
 .notice{font-size:12px}
 .about,.about a{font-size:12px}
 .chip{font-size:11px;line-height:1.7}
 .quiz-top{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:10px 12px;margin-bottom:20px;align-items:center}
 .quiz-top .text-button{font-size:11px;line-height:1.7;gap:6px;padding:0;text-align:left;justify-content:flex-start}
 .quiz-top .text-button svg{width:16px}
 .question-count{font-size:12px}
 .quiz-progress{grid-column:1/-1;grid-row:2;max-width:none;width:100%}
 .timer{grid-column:3;grid-row:1;font-size:13px;padding:8px}
 .question-panel{padding:24px 18px}
 .quiz-meta{margin-bottom:22px;gap:8px}
 .quiz-meta .small{font-size:11px}
 .question-text{font-size:18px;line-height:1.95;margin-bottom:25px}
 .choices{gap:12px}
 .choice{font-size:15px;padding:17px 14px;gap:12px;min-height:58px;line-height:1.9}
 .choice-letter{width:25px;height:25px;font-size:11px}
 .choice-indicator{font-size:10px;align-self:flex-start;margin-top:5px}
 .quiz-bottom{gap:12px;flex-wrap:wrap}
 .quiz-bottom>.btn{flex:1;min-width:120px;min-height:48px;font-size:14px;padding:12px 15px}
 .quiz-bottom>.small{flex-basis:100%;font-size:12px}
 .quiz-bottom .text-button{font-size:13px}
 .quiz-help{display:none}
 .explanation>p{font-size:14px;line-height:2}
 .explanation details{font-size:13px}
 .explanation summary{min-height:44px}
 .answer-status{font-size:16px;flex-wrap:wrap}
 .source-note{font-size:11px!important;line-height:1.8}
 .exam-tools{gap:10px;align-items:center}
 .exam-tools .text-button{font-size:12px;gap:7px;line-height:1.8}
 .question-map{gap:8px}
 .result-score{flex-wrap:wrap}
 .result-score .big-number{font-size:54px}
 .result-badge{font-size:12px;line-height:1.7}
 .score-row{font-size:12px;gap:12px;flex-wrap:wrap}
 .score-row .bar{max-width:80px;min-width:35px}
 .score-row>.small{font-size:11px}
 .result-actions{gap:12px}
 .result-actions .btn{flex:1 1 180px;font-size:13px;min-height:48px}
 .list-row .row-content strong{font-size:14px}
 .list-row small,.result-answer{font-size:12px}
 .tabs-inline{gap:22px}
 .tabs-inline button{font-size:13px}
 .setting-row{flex-wrap:wrap;align-items:flex-start;gap:14px}
 .setting-row>div:first-child{flex:1 1 210px}
 .setting-row strong{font-size:14px}
 .setting-row p{font-size:12px}
 .setting-row .btn{min-height:44px;font-size:13px;padding:11px 16px}
 .setting-row .segments{flex-direction:row}
 .month-grid{gap:5px}
 .day{min-height:62px;font-size:11px}
 .day strong{font-size:17px}
 .empty{padding:34px 18px}
 .empty p{font-size:13px}
 .mobile-nav{display:flex;position:fixed;inset:auto 0 0;justify-content:space-around;gap:2px;padding:8px max(6px,env(safe-area-inset-right)) calc(8px + env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left));background:#fbfcf9f5;border:0;border-top:1px solid var(--line);z-index:25;backdrop-filter:blur(12px)}
 .mobile-nav button{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;min-width:0;min-height:50px;gap:5px;padding:4px 2px;font-size:11px;color:#65716b;border-radius:5px}
 .mobile-nav svg{width:22px;height:22px}
 .mobile-nav button.active{color:var(--green);font-weight:650}
 #toast{left:50%;bottom:calc(84px + env(safe-area-inset-bottom));font-size:12px}
 dialog{padding:24px 20px}
}
@media(max-width:359px){
 .prototype-tag{max-width:72px;text-align:center;line-height:1.5}
 .progress-panel{grid-template-columns:minmax(0,1fr) 64px minmax(0,1fr);gap:10px;padding-inline:14px}
 .progress-ring,.progress-ring svg{width:64px;height:64px}
 .progress-panel h3{font-size:11px}
 .start-actions .btn{flex-basis:100%}
 .choice{padding-inline:12px;gap:10px}
 .choice-indicator{display:none}
 .stat{padding-inline:9px}
 .stats-strip .stat>span{font-size:10px}
 .exam-facts strong{font-size:25px}
}
@media(max-height:550px) and (min-width:600px) and (max-width:1199px){
 .mobile-nav{gap:3px;padding:10px 8px}
 .mobile-nav:before{padding:2px 0 8px}
 .mobile-nav button{min-height:57px;padding:7px 2px;gap:4px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Study-first screens: concise labels and short pages, without shrinking content. */
.topbar{height:54px;padding-inline:24px}
.prototype-tag{font-size:10px;letter-spacing:0;white-space:nowrap}
.main{max-width:940px;padding:16px 24px 28px}
.page-head{margin-bottom:12px;gap:8px}
.page-head h1{font-size:19px;line-height:1.4;letter-spacing:0}
.panel{padding:16px 18px}
.panel+.panel{margin-top:12px}
.panel h2,.home-subjects h2{font-size:14px;line-height:1.5}
.compact-stats{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:34px;margin-bottom:10px;color:var(--muted);font-size:12px;line-height:1.7}
.compact-stats b{font-size:14px;font-weight:550;color:var(--ink);white-space:nowrap}
.home-start{display:grid;grid-template-columns:1.5fr 1fr;gap:10px;margin-bottom:14px}
.home-start>.btn{font-size:14px;min-height:44px;padding:10px 14px}
.resume-info{font-size:12px;line-height:1.7;color:var(--muted);margin-bottom:8px}
.home-subjects h2{margin-bottom:6px}
.subject-row{grid-template-columns:25px minmax(0,1fr) 54px 16px;gap:10px;min-height:44px;padding:8px 3px}
.subject-title{font-size:14px;line-height:1.6}
.subject-ratio,.subject-index{font-size:11px}
.form-grid{gap:18px}
.form-row{gap:6px;margin-bottom:12px}
.form-row>label,.label{font-size:13px}
.select,input[type=search]{min-height:44px;padding:10px 12px}
.segment{font-size:13px;min-height:44px;padding:9px 14px}
.check-row{font-size:13px;min-height:40px}
.form-footer{display:grid;grid-template-columns:minmax(0,1fr) minmax(110px,1fr);gap:12px;align-items:center;padding-top:12px;margin-top:4px}
.form-footer>.btn{width:auto;min-height:44px;font-size:14px;padding:10px 14px}
.form-footer .muted{font-size:11px;line-height:1.6}
.full-width{width:100%;margin-top:12px}
.exam-facts{margin:0 0 14px;padding:0 0 14px;gap:12px}
.exam-facts strong{font-size:28px}
.exam-facts small,.exam-facts span{font-size:11px;line-height:1.6}
.exam-allocation{gap:6px;margin:8px 0 12px}
.exam-rule,.setting-note{font-size:12px;line-height:1.8;color:var(--muted);margin-top:8px}
.compact-details{border-top:1px solid var(--line);margin-top:12px;font-size:12px;line-height:1.8}
.compact-details summary,.question-navigation summary{cursor:pointer;min-height:44px;padding:11px 0;line-height:1.8}
.compact-details p{font-size:12px;line-height:1.9;margin:4px 0 10px}
.app-info{margin-top:16px}
.setting-row{padding:12px 0;gap:12px;align-items:center}
.setting-row>div:first-child{flex:1;min-width:80px}
.setting-row strong{font-size:13px}
.setting-row .btn{font-size:13px;min-height:44px;padding:10px 13px}
.setting-row .segments{flex-direction:row}
.tabs-inline{gap:22px;margin-bottom:12px}
.tabs-inline button{font-size:13px;min-height:44px}
.compact-review section[role=tabpanel]{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:8px 12px;align-items:start}
.compact-review .search-wrap{margin:0;min-width:0}
.compact-review .section-head{margin:0;grid-column:2;grid-row:1}
.compact-review .section-head>.small{display:none}
.compact-review .section-head>.btn{padding:10px 12px;font-size:12px}
#review-list,.compact-review .pager,.compact-review .empty{grid-column:1/-1}
.list-row{padding:9px 0;gap:12px;min-height:60px}
.list-row .row-content strong{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:13px;line-height:1.7;font-weight:500}
.list-row .row-content small{font-size:10px;line-height:1.4}
.empty{padding:24px 16px}
.empty p{font-size:13px;margin-bottom:16px}
.pager{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:12px;font-size:12px}
.pager .btn{font-size:12px;min-height:44px;padding:10px 18px}
.month-grid{margin-top:10px;gap:6px}
.day{min-height:48px;gap:4px;font-size:10px}
.day strong{font-size:17px}
.score-row{padding:9px 0;font-size:12px;gap:12px;flex-wrap:nowrap}
.score-row>.small{white-space:nowrap;font-size:10px}
.history-row{padding:12px 0}
.empty-message{font-size:13px;color:var(--muted)}
.result-score{padding:0 0 12px;margin-bottom:10px;flex-wrap:nowrap}
.result-score .big-number{font-size:44px}
.result-score .of{font-size:16px}
.result-badge{font-size:11px;padding:7px 9px}
.result-actions{margin-top:14px;gap:10px}
.result-actions .btn{flex:1;min-height:44px;min-width:0;font-size:13px;padding:10px}
.answer-row{width:100%;min-height:68px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);text-align:left;padding:10px 0;font-size:13px;line-height:1.7}
.answer-row>span:nth-child(2){display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1;min-width:0}
.answer-row>svg{width:16px}
.answer-mark{font-size:19px;color:var(--green);flex-shrink:0}
.answer-mark.wrong{color:var(--red)}
.dialog-question{display:block;font-size:14px;font-weight:550;color:var(--ink);margin-bottom:14px}
.dialog-answer{display:block;font-size:13px;line-height:1.8;margin-bottom:10px}
.dialog-explanation{display:block;border-top:1px solid var(--line);padding-top:12px;font-size:14px;line-height:1.9;white-space:pre-wrap;color:var(--ink)}

/* A focused question screen uses the space previously occupied by navigation. */
:root[data-view=quiz] .sidebar,:root[data-view=quiz] .topbar,:root[data-view=quiz] .mobile-nav{display:none}
:root[data-view=quiz] .shell{margin-left:0}
:root[data-view=quiz] .main{padding:10px 18px 18px;max-width:880px}
.quiz-top{gap:12px;margin-bottom:6px;min-height:44px;position:sticky;top:0;background:var(--paper);z-index:5}
.quiz-top .text-button{font-size:12px}
.quiz-progress{max-width:150px}
.question-count{font-size:12px}
.question-panel{padding:14px 18px}
.quiz-meta{margin-bottom:8px;gap:8px;min-height:44px}
.quiz-meta .chip{font-size:11px}
.quiz-meta>.chip{margin-right:auto}
.quiz-meta .icon-button{width:44px;height:44px}
.question-text{font-size:19px;line-height:1.75;margin-bottom:14px}
.choices{gap:8px}
.choice{padding:10px 13px;min-height:44px;font-size:15px;line-height:1.75;gap:11px}
.choice-letter{width:23px;height:23px;font-size:11px;margin-top:1px}
.choice-indicator{font-size:10px}
.quiz-bottom{margin-top:12px;gap:10px;flex-wrap:nowrap}
.quiz-bottom>.btn{flex:1;min-height:44px;font-size:14px;padding:10px 14px;min-width:0}
.quiz-bottom>.text-button{font-size:13px}
.quiz-bottom>span:empty{flex:1}
.explanation{margin-top:14px;padding-top:14px}
.explanation>p{font-size:14px;line-height:1.9}
.explanation details{font-size:12px;margin-top:10px}
.explanation summary{min-height:44px}
.answer-status{font-size:15px;margin-bottom:10px}
.question-navigation{border-top:1px solid var(--line);margin-top:12px;font-size:12px}
.question-navigation .question-map{margin-top:6px;margin-bottom:12px}
.question-navigation>.btn{width:100%}

@media(max-width:599px){
 html{scroll-padding-top:58px}
 .topbar{height:50px;padding-inline:max(14px,env(safe-area-inset-left))}
 .main{padding:12px max(14px,env(safe-area-inset-right)) calc(64px + env(safe-area-inset-bottom)) max(14px,env(safe-area-inset-left))}
 .page-head{margin-bottom:10px}
 .page-head h1{font-size:18px}
 .panel{padding:14px}
 .home-start{margin-bottom:12px}
 .compact-stats{gap:8px;margin-bottom:8px;font-size:11px;min-height:32px}
 .compact-stats b{font-size:13px}
 .subject-row{min-height:44px;padding-block:8px}
 .subject-title{font-size:13px}
 .subject-ratio{font-size:11px}
 .form-grid{gap:0}
 .form-row{margin-bottom:12px;gap:6px}
 .form-footer{gap:10px}
 .form-footer>.btn{width:auto;min-height:44px}
 .form-footer .muted{font-size:11px}
 .form-row>label,.label{font-size:13px}
 .check-row{min-height:40px;font-size:12px}
 .setting-row{flex-wrap:nowrap;align-items:center;gap:10px}
 .setting-row>div:first-child{flex:1 1 auto;min-width:66px}
 .setting-row .segments{gap:6px;flex-shrink:0}
 .setting-row .segment{font-size:12px;padding-inline:11px}
 .setting-row .btn{padding-inline:10px;font-size:12px}
 .mobile-nav{padding-top:4px;padding-bottom:calc(4px + env(safe-area-inset-bottom))}
 .mobile-nav button{min-height:44px;font-size:10px;gap:3px}
 .mobile-nav svg{width:20px;height:20px}
 .tabs-inline{margin-bottom:10px}
 .result-actions .btn{flex:1 1 0}
 .result-badge{max-width:145px;font-size:10px;line-height:1.7}
 .score-row{gap:10px}
 :root[data-view=quiz] .main{padding:6px max(10px,env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left))}
 .quiz-top{grid-template-columns:minmax(0,1fr) auto auto;gap:3px 10px;padding-bottom:6px;margin-bottom:4px}
 .quiz-top .text-button{font-size:12px;min-height:38px}
 .quiz-progress{height:3px;grid-row:2;width:100%;max-width:none}
 .timer{font-size:12px;padding:6px 8px}
 .question-panel{padding:10px 12px 12px}
 .quiz-meta{min-height:44px;margin-bottom:8px}
 .question-text{font-size:17px;line-height:1.75;margin-bottom:12px}
 .choice{font-size:15px;line-height:1.7;min-height:44px;padding:9px 11px;gap:10px}
 .choice-indicator{display:block;margin-top:3px;font-size:10px}
 .quiz-bottom>.btn{min-height:44px;font-size:13px;padding:10px 12px}
 .quiz-bottom>.small{flex-basis:auto}
 .question-navigation{margin-top:10px}
 #toast{bottom:calc(68px + env(safe-area-inset-bottom))}
 :root[data-view=quiz] #toast{bottom:16px}
}
@media(max-width:359px){
 .prototype-tag{max-width:none;line-height:1.5;font-size:9px}
 .home-start{gap:8px}
 .home-start .btn{padding-inline:10px;font-size:13px}
 .compact-stats{font-size:10px}
 .compact-stats b{font-size:12px}
 .setting-row{gap:8px}
 .setting-row strong{font-size:12px}
 .setting-row .segment,.setting-row .btn{padding-inline:8px;font-size:12px}
}

/* Keep summary screens within a short phone viewport. */
.compact-records .panel{padding:12px 14px}
.compact-records .panel+.panel{margin-top:10px}
.compact-records .score-row{padding:7px 0}
.compact-records .day{min-height:40px}
.compact-exam .exam-facts{margin-bottom:10px;padding-bottom:10px}
.compact-exam .exam-allocation{margin-bottom:8px}

.question-list-button{min-height:44px;padding:6px 8px;border:1px solid var(--line);border-radius:5px;background:white;white-space:nowrap}
#dialog .question-map{margin-top:0}
.question-text,.choice>span:nth-child(2),.explanation>p{white-space:pre-wrap;overflow-wrap:anywhere}
.source-details ul{margin:0;padding-left:20px;line-height:1.8}
.source-details li+li{margin-top:6px}
.source-details a{display:inline-block;min-height:32px;padding:5px 0}
.subject-row{grid-template-columns:25px minmax(0,1fr) 64px 16px}