:root{
      --navy:#0f2742;
      --navy-2:#183a5b;
      --teal:#0f9d94;
      --teal-soft:#e8f7f5;
      --bg:#f4f7fb;
      --card:#ffffff;
      --text:#1d2a36;
      --muted:#66788a;
      --line:#dbe4ec;
      --good:#176b54;
      --good-bg:#e9f7f1;
      --mid:#8a6412;
      --mid-bg:#fff7df;
      --warn:#8a3b32;
      --warn-bg:#fff0ed;
      --shadow:0 16px 40px rgba(15,39,66,.10);
    }
    *{box-sizing:border-box}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;background:var(--bg);color:var(--text)}
    button{font:inherit}
    .app{min-height:100vh}
    .topbar{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:18px 22px;position:sticky;top:0;z-index:10;box-shadow:0 6px 20px rgba(15,39,66,.18)}
    .topbar-inner{max-width:1040px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .brand{font-weight:800;letter-spacing:.02em}.brand small{display:block;font-weight:500;opacity:.75;margin-top:2px}
    .topbar-actions{display:flex;gap:8px;align-items:center}.top-action{border:1px solid rgba(255,255,255,.38);background:rgba(255,255,255,.10);color:#fff;border-radius:10px;padding:9px 13px;font-weight:800;cursor:pointer}.top-action:hover{background:rgba(255,255,255,.18)}.progress-wrap{min-width:230px}.progress-label{font-size:.82rem;opacity:.85;margin-bottom:6px;text-align:right}.progress{height:8px;background:rgba(255,255,255,.18);border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;background:#47d7cd;width:0%;transition:.25s}
    main{max-width:1040px;margin:0 auto;padding:30px 20px 44px}
    .screen{display:none}.screen.active{display:block}
    .hero,.card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
    .hero{padding:42px}.hero h1{font-size:clamp(2rem,4vw,3.4rem);margin:0 0 12px;color:var(--navy);line-height:1.15}.hero .lead{font-size:1.08rem;line-height:1.9;color:#33495e;max-width:760px}
    .activity-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:28px 0}.activity{background:var(--teal-soft);border:1px solid #bfe7e2;border-radius:14px;padding:14px;text-align:center;font-weight:700;color:#16524e}.activity small{display:block;font-weight:500;color:#4c7773;margin-top:4px}
    .note{background:#f7fafc;border-left:4px solid var(--teal);padding:16px 18px;border-radius:10px;line-height:1.7;color:#42576b}
    .btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{border:0;border-radius:12px;padding:13px 20px;cursor:pointer;font-weight:800}.btn-primary{background:var(--teal);color:#fff}.btn-secondary{background:#e9eef4;color:var(--navy)}.btn-ghost{background:#fff;color:var(--navy);border:1px solid var(--line)}.btn:disabled{opacity:.45;cursor:not-allowed}
    .case-card{overflow:hidden}.case-head{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:24px 28px;display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.case-head h2{margin:4px 0 0;font-size:1.6rem}.eyebrow{font-size:.86rem;letter-spacing:.08em;text-transform:uppercase;opacity:.8}.step-badge{background:#ffffff18;border:1px solid #ffffff35;padding:10px 14px;border-radius:12px;text-align:right;white-space:nowrap}.step-badge strong{display:block;font-size:1rem}.step-badge small{opacity:.78}
    .case-body{padding:28px}.scenario{font-size:1.04rem;line-height:1.9;margin:0 0 24px;white-space:pre-line}
    .rating{font-size:1.15rem;letter-spacing:.08em;margin-bottom:6px}.feedback-section{margin-top:14px}.feedback-section h4{margin:0 0 7px;font-size:.96rem}.principle-list{display:grid;gap:10px;margin-top:10px}.principle-item{padding:12px 14px;border-radius:10px;background:rgba(255,255,255,.55);border:1px solid rgba(0,0,0,.08)}.principle-item strong{display:block;margin-bottom:4px}.principle-item span{line-height:1.65;font-size:.94rem}.chosen-label{font-size:.82rem;font-weight:700;opacity:.8;margin-bottom:8px}
    .choices{display:grid;gap:12px}.choice{width:100%;text-align:left;border:1px solid var(--line);background:#fff;border-radius:14px;padding:16px 18px;cursor:pointer;display:flex;gap:14px;align-items:flex-start;transition:.18s}.choice:hover{border-color:#8bcac5;transform:translateY(-1px)}.choice.selected{border-color:var(--teal);box-shadow:0 0 0 3px rgba(15,157,148,.12)}.choice-letter{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#eef3f7;color:var(--navy);font-weight:900;flex:0 0 30px}.choice.selected .choice-letter{background:var(--teal);color:#fff}.choice-text{line-height:1.65}
    .feedback{margin-top:22px;border-radius:14px;padding:18px;display:none}.feedback.show{display:block}.feedback.good{background:var(--good-bg);border:1px solid #bfe4d5;color:var(--good)}.feedback.mid{background:var(--mid-bg);border:1px solid #eed997;color:var(--mid)}.feedback.warn{background:var(--warn-bg);border:1px solid #efc5be;color:var(--warn)}.feedback h3{margin:0 0 8px}.feedback p{margin:8px 0;line-height:1.75}.principles{margin-top:12px;padding-top:12px;border-top:1px dashed currentColor;font-size:.95rem}
    .case-actions{display:flex;justify-content:space-between;gap:12px;margin-top:24px;flex-wrap:wrap}.right-actions{display:flex;gap:10px;flex-wrap:wrap}
    .summary{padding:36px}.summary h2{margin-top:0;color:var(--navy)}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}.summary-box{background:#f7fafc;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center}.summary-box strong{display:block;font-size:1.8rem;color:var(--navy)}
    .modal-backdrop{position:fixed;inset:0;background:rgba(5,18,32,.62);display:none;align-items:center;justify-content:center;padding:20px;z-index:100}.modal-backdrop.show{display:flex}.modal{width:min(520px,100%);background:#fff;border-radius:18px;padding:26px;box-shadow:0 24px 70px rgba(0,0,0,.28)}.modal h2{margin:0 0 10px;color:var(--navy)}.modal p{line-height:1.75;color:#42576b}.modal-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap;margin-top:22px}.exit-message{text-align:center;padding:44px 28px}.exit-message h2{color:var(--navy);margin-top:0}.review-list{display:grid;gap:10px}.review-item{display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line);padding:10px 0}.muted{color:var(--muted)}
    @media (max-width:760px){.topbar-inner{align-items:stretch;flex-direction:column}.topbar-actions{width:100%}.top-action{flex:1}.progress-wrap{width:100%;min-width:0}.progress-label{text-align:left}.hero{padding:28px 22px}.activity-grid{grid-template-columns:repeat(2,1fr)}.case-head{flex-direction:column}.step-badge{text-align:left}.case-body{padding:22px}.meta{grid-template-columns:1fr}.summary-grid{grid-template-columns:1fr}.case-actions{flex-direction:column}.case-actions .btn,.right-actions{width:100%}.right-actions .btn{flex:1}}
  
    html{scroll-padding-top:130px}
    .brand,.case-head>div{min-width:0;overflow-wrap:anywhere}
    .case-head h2{line-height:1.55}
    .topbar-actions{flex-shrink:0}
    .topbar-inner{gap:12px}
    .progress-wrap{min-width:170px}
    .status{margin:0 0 18px;padding:12px 16px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--muted);font-size:.9rem;line-height:1.7}
    .status[data-error=true]{background:var(--warn-bg);color:var(--warn);border-color:#efc5be}
    .status:empty{display:none}
    .source-note,.method-note{font-size:.87rem;line-height:1.8;color:var(--muted)}
    .method-note{margin-top:18px}
    .principle-role{display:inline-block;font-size:.7rem;border:1px solid currentColor;border-radius:5px;padding:1px 5px;margin-right:8px;font-weight:500;vertical-align:middle}
    .principle-ref{display:block;font-size:.78rem!important;opacity:.82;margin-top:5px}
    .feedback .feedback-section p{white-space:pre-line}
    .feedback-section+.feedback-section{padding-top:10px}
    .caution{padding:14px 16px;background:#fff6db;color:#745008;border:1px solid #e9cf83;border-radius:10px;line-height:1.85;margin-bottom:18px}
    .recommended{background:rgba(255,255,255,.65);padding:14px 16px;border-radius:10px;margin-top:18px}
    .recommended strong{display:block;margin-bottom:5px}
    .source-note{margin-top:18px;padding-top:12px;border-top:1px solid rgba(0,0,0,.12)}
    .source-note p{font-size:.84rem}
    .sources{margin:8px 0;padding-left:20px;font-size:.84rem;line-height:1.8}
    .footer{max-width:1040px;margin:0 auto;padding:0 20px 28px;line-height:1.7;font-size:.77rem;color:var(--muted);overflow-wrap:anywhere}
    .review-item{width:100%;text-align:left;background:none;border:0;border-bottom:1px solid var(--line);cursor:pointer;font:inherit;line-height:1.7;color:var(--text);padding:14px 0;align-items:center}
    .review-item strong{white-space:nowrap;font-size:.85rem;flex-shrink:0}
    .review-item:hover{background:var(--teal-soft)}
    .choice[aria-pressed=true]{border-color:var(--teal);box-shadow:0 0 0 3px rgba(15,157,148,.12)}
    button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #247bcc;outline-offset:3px}
    .choice{transform:none!important}
    .top-action:disabled{opacity:.4;cursor:not-allowed}
    details.about{border-top:1px solid var(--line);padding-top:18px;margin-top:24px;font-size:.9rem;line-height:1.85;color:var(--muted)}
    details.about summary{font-weight:700;cursor:pointer;color:var(--navy)}
    .legend{line-height:1.8;font-size:.87rem;margin-top:16px}
    .rating{letter-spacing:.02em}
    #exitDialog .status{margin-top:16px;margin-bottom:0}
    @media(max-width:900px){.topbar-inner{flex-wrap:wrap}.brand{flex:1 1 260px}.progress-wrap{flex:1 1 160px}.topbar-actions{flex:0 0 auto}}
    @media(max-width:760px){.brand,.progress-wrap{flex:auto}.topbar-actions{display:flex;width:100%}.top-action{padding:9px 7px}.topbar{padding:12px 16px}.brand{font-size:.96rem}.brand small{font-size:.76rem}.topbar-inner{gap:9px}.progress-label{margin-bottom:3px}.case-head h2{font-size:1.3rem}.case-head{padding:20px}.case-body{padding:20px}.hero h1{font-size:2rem}.feedback{padding:16px}.summary{padding:24px 20px}.review-item{gap:14px}.review-item span{min-width:0}.step-badge{display:none}.eyebrow{font-size:.8rem}.case-head .eyebrow::after{content:attr(data-activity);display:block;margin-top:6px;letter-spacing:0}.hero{padding:26px 20px}.activity-grid{margin:20px 0}.activity{padding:11px}main{padding:20px 12px 28px}}

/* Preview-only review controls. */
[hidden]{display:none!important}
.preview-strip{padding:12px 16px;background:var(--teal-soft);border:1px solid #b8e2de;border-radius:12px;margin-bottom:12px;color:var(--navy);font-size:.88rem;line-height:1.7}
.preview-strip strong{margin-right:12px}
.preview-strip span{display:inline-block}
.learner-buttons .btn{min-height:48px}
.case-tools{margin:0 0 18px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#f6f8fb}
.case-tools p{margin:0 0 10px;font-size:.83rem;line-height:1.7;color:var(--muted)}
.case-controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.case-controls label{font-size:.8rem;color:var(--muted);max-width:100%;flex:1 1 240px}
.case-controls select{max-width:100%;width:100%;font-size:.85rem}
.case-controls .btn{padding:10px 14px;font-size:.85rem}
select,input[type=search]{font:inherit;color:var(--text);background:white;border:1px solid #bdcbd9;border-radius:8px;padding:10px 12px;min-height:44px}
.audit-top{padding:30px;margin-bottom:20px}
.audit-top h2{margin:8px 0 16px;color:var(--navy);font-size:1.8rem}
.audit-top p{line-height:1.85}
.audit-toolbar{display:flex;gap:14px;flex-wrap:wrap;align-items:end;margin-top:24px}
.audit-toolbar label{display:flex;flex-direction:column;gap:6px;font-size:.86rem;color:var(--muted)}
.audit-toolbar .search-label{flex:1 1 190px;min-width:0}
.audit-tools{display:flex;gap:8px;flex-wrap:wrap}
.audit-tools .btn{padding:11px 14px;font-size:.84rem}
.audit-cases{display:grid;gap:12px}
.audit-case{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;scroll-margin-top:180px}
.audit-case>summary{display:flex;align-items:center;gap:14px;list-style:none;padding:18px 20px;cursor:pointer}
.audit-case>summary::-webkit-details-marker{display:none}
.audit-case>summary:after{content:'＋';font-size:1.2rem;color:var(--muted)}
.audit-case[open]>summary:after{content:'−'}
.audit-case[open]>summary{background:#f3f7fa;border-bottom:1px solid var(--line)}
.audit-num{font-size:1.15rem;font-weight:700;color:var(--teal);font-variant-numeric:tabular-nums}
.audit-title{flex:1;min-width:0;line-height:1.7;font-weight:700;color:var(--navy)}
.audit-title small{display:block;font-size:.76rem;font-weight:400;color:var(--muted)}
.audit-tag{display:inline-block;white-space:nowrap;border:1px solid #bcded9;border-radius:6px;background:var(--teal-soft);padding:4px 9px;font-size:.76rem;color:#19675d}
.audit-tag.conditional{border-color:#e9cf83;background:#fff6db;color:#745008}
.audit-inner{padding:26px;line-height:1.85;overflow-wrap:anywhere}
.audit-inner h3{color:var(--navy);font-size:1.08rem;margin:26px 0 10px}
.audit-inner h4{font-size:.87rem;margin:14px 0 5px}
.audit-inner p{margin:8px 0 16px}
.audit-scenario{white-space:pre-line;border-left:3px solid var(--teal);padding:12px 16px;background:#f6f9fc}
.audit-options{display:grid;gap:14px}
.audit-option{padding:20px;border-radius:12px;border:1px solid var(--line);color:var(--text)}
.audit-option.good{border-color:#abd6c6;background:#f0faf5}
.audit-option.mid{border-color:#e7d7ab;background:#fffcf4}
.audit-option.warn{border-color:#e6c5c2;background:#fff7f6}
.audit-option-head{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.audit-option-head strong{font-size:1.03rem;color:var(--navy)}
.audit-option-head span{font-size:.78rem;color:var(--muted)}
.audit-choice{font-weight:650}
.audit-principles .principle-item{background:#f5f8fb}
.audit-change{margin-top:24px;border-left:3px solid #748ba2;padding:14px 18px;background:#f4f7fa;font-size:.9rem}
.audit-change p{margin-bottom:0}
.small{font-size:.83rem}
.topbar .brand{flex:1;min-width:200px}
.topbar .progress-wrap{flex:0 0 150px;min-width:150px}
.topbar .topbar-actions{display:flex;gap:6px}
.topbar .top-action{font-size:.84rem;padding:10px 12px}
@media(max-width:1000px){.topbar .brand{flex:1 1 55%}.topbar .topbar-actions{flex:1;justify-content:flex-end}.topbar .progress-wrap{flex:1 1 150px}}
@media(max-width:760px){.audit-top{padding:22px 18px}.audit-top h2{font-size:1.5rem}.audit-inner{padding:18px}.audit-option{padding:16px}.audit-case>summary{gap:10px;padding:15px 14px;flex-wrap:wrap}.audit-title{flex-basis:75%}.audit-tag{margin-left:28px}.audit-toolbar>label{flex:1 1 100%}.audit-tools{width:100%}.case-controls{align-items:stretch}.case-controls>*{flex:1 1 100%}.topbar .brand{flex:auto;min-width:0}.topbar .progress-wrap{flex:auto;width:100%;min-width:0}.topbar .topbar-actions{width:100%;justify-content:stretch}.topbar .top-action{font-size:.8rem;padding:9px 7px;flex:1}.learner-buttons .btn{width:100%}.audit-case{scroll-margin-top:215px}.audit-toolbar input,.audit-toolbar select{width:100%}}
@media print{.topbar,.footer,#storageStatus,#migrationStatus,.preview-strip,.audit-toolbar,.btn,.top-action{display:none!important}.screen{display:none!important}.screen.active{display:block!important}main{max-width:none;padding:0}.audit-case{break-inside:auto}.audit-option,.principle-item{break-inside:avoid}.audit-case>summary:after{display:none}.audit-inner{padding:12px}.audit-top{border:0;box-shadow:none;padding:0}}