:root{
  --bg:#f6f3ec;--card:#fff;--ink:#1d2733;--muted:#647083;--blue:#174f7a;
  --blue2:#2e6f9e;--line:#d9dee5;--good:#2d7d46;--warn:#a76a00;
  --shadow:0 12px 34px rgba(26,43,61,.12);--radius:20px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}
.app{max-width:980px;margin:0 auto;padding:18px}
.topbar{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:46px;height:46px;border-radius:14px;background:linear-gradient(145deg,var(--blue),#7aa8c8);display:grid;place-items:center;color:white;font-weight:800}
.brand h1{font-size:1.05rem;margin:0}
.brand p{margin:2px 0 0;color:var(--muted);font-size:.87rem}
.controls{display:flex;gap:8px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:white;color:var(--ink);border-radius:12px;padding:10px 14px;font-weight:650}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn.ghost{background:transparent}
.btn.danger{color:#a22}
.card{background:var(--card);border:1px solid rgba(20,44,67,.08);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.home-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}
@media(max-width:760px){.home-grid{grid-template-columns:1fr}.card{padding:18px}.app{padding:10px}}
.hero h2{font-size:clamp(1.8rem,5vw,3rem);line-height:1.05;margin:0 0 12px;color:var(--blue)}
.hero p{line-height:1.6;color:var(--muted)}
.notice{background:#eef5fa;border-left:4px solid var(--blue2);padding:12px 14px;border-radius:10px;line-height:1.45}
.profile-list{display:grid;gap:10px;margin-top:14px}
.profile-item{display:flex;justify-content:space-between;gap:10px;align-items:center;border:1px solid var(--line);padding:12px;border-radius:14px}
.profile-meta strong{display:block}.profile-meta span{font-size:.85rem;color:var(--muted)}
.progress-wrap{margin:8px 0 18px}
.progress-line{height:10px;background:#e9edf2;border-radius:999px;overflow:hidden}
.progress-line>div{height:100%;background:linear-gradient(90deg,var(--blue),#76a6c6);width:0}
.progress-label{display:flex;justify-content:space-between;color:var(--muted);font-size:.9rem;margin-bottom:7px}
.quiz-head{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.exercise-num{color:var(--blue2);font-weight:800;letter-spacing:.04em;text-transform:uppercase;font-size:.82rem}
.exercise-title{font-size:clamp(1.45rem,4vw,2.2rem);line-height:1.15;margin:7px 0 18px}
.original-text{font-family:Georgia,"Times New Roman",serif;font-size:1.04rem;line-height:1.65}
.original-text p{margin:0 0 13px}
.answer-area{margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}
.answer-area label{font-weight:800;display:block;margin-bottom:8px}
textarea{width:100%;min-height:170px;border:1px solid #bfc8d2;border-radius:14px;padding:14px;resize:vertical;background:#fbfcfd;line-height:1.5}
.range-row{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
input[type=range]{width:100%}
.score-badge{min-width:52px;text-align:center;border-radius:12px;padding:10px;background:#eaf2f8;color:var(--blue);font-size:1.25rem;font-weight:850}
.nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px;flex-wrap:wrap}
.nav .right{display:flex;gap:8px}
.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}
.stat{border:1px solid var(--line);border-radius:15px;padding:15px}.stat b{display:block;font-size:1.6rem;color:var(--blue)}.stat span{color:var(--muted);font-size:.88rem}
@media(max-width:620px){.summary-grid{grid-template-columns:1fr}.nav{display:grid;grid-template-columns:1fr}.nav .right{display:grid;grid-template-columns:1fr 1fr}.nav button{width:100%}}
.results-list{display:grid;gap:10px}
.result-item{border:1px solid var(--line);border-radius:14px;padding:14px}
.result-item summary{font-weight:800;cursor:pointer}
.result-answer{white-space:pre-wrap;background:#f7f9fb;padding:12px;border-radius:10px;margin-top:10px}
.compare-table{width:100%;border-collapse:collapse;font-size:.92rem}
.compare-table th,.compare-table td{border:1px solid var(--line);padding:10px;vertical-align:top;text-align:left}
.compare-table th{background:#eff5f9}
.modal{position:fixed;inset:0;background:rgba(16,28,40,.55);display:grid;place-items:center;padding:18px;z-index:50}
.modal-card{background:white;border-radius:18px;max-width:520px;width:100%;padding:22px;box-shadow:var(--shadow)}
.modal-card input,.modal-card select{width:100%;padding:11px;border:1px solid var(--line);border-radius:10px;margin:7px 0 15px}
.small{font-size:.85rem;color:var(--muted)}
.footer{text-align:center;color:var(--muted);font-size:.8rem;padding:18px 0}
@media print{.topbar,.nav,.controls,.footer,.no-print{display:none!important}.app{max-width:none}.card{box-shadow:none;border:0}.result-item{break-inside:avoid}}

.version-pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;font-size:.78rem;color:var(--muted)}
.update-banner{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:80;width:min(680px,calc(100% - 24px));background:#102b40;color:white;border-radius:16px;padding:14px 16px;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:space-between;gap:12px}
.update-banner .btn{white-space:nowrap}
.diag-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}
.diag-row{border:1px solid var(--line);border-radius:13px;padding:12px;background:#fbfcfd}
.diag-row b{display:block;margin-bottom:4px}.diag-row span{color:var(--muted);font-size:.9rem;overflow-wrap:anywhere}
.test-pass{color:var(--good)}.test-fail{color:#a22}.test-warn{color:var(--warn)}
.interpretation{display:grid;gap:12px;margin-top:20px}
.interpretation article{border:1px solid var(--line);border-radius:14px;padding:14px;background:#fbfcfd}
.interpretation h4{margin:0 0 6px;color:var(--blue)}
.compare-controls{display:grid;grid-template-columns:1fr 1fr auto;gap:10px;align-items:end;margin:16px 0}
.compare-controls label{font-weight:750}
.compare-controls select{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff}
@media(max-width:650px){.diag-grid{grid-template-columns:1fr}.compare-controls{grid-template-columns:1fr}}


.save-indicator{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:.83rem;min-height:22px}
.save-dot{width:8px;height:8px;border-radius:50%;background:#8a96a3}
.save-indicator.saving .save-dot{background:var(--warn)}
.save-indicator.saved .save-dot{background:var(--good)}
.status-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.btn.skip-active{background:#fff4df;border-color:#d7a54b;color:#7a4a00}
.btn.smallbtn{padding:7px 10px;font-size:.86rem}
.profile-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:12px 0 16px}
.filter-bar label{display:flex;align-items:center;gap:7px;font-weight:650}
.copy-preview{width:100%;min-height:360px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88rem}
.modal-card.wide{max-width:850px}
.module-chip{display:inline-flex;align-items:center;border-radius:999px;background:#eaf2f8;color:var(--blue);padding:6px 10px;font-size:.78rem;font-weight:750}
.toast{position:fixed;right:18px;bottom:18px;z-index:100;background:#173246;color:#fff;padding:12px 16px;border-radius:13px;box-shadow:var(--shadow);max-width:360px}
.answer-tools{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px}
.private-note{margin-top:14px}
.private-note summary{cursor:pointer;color:var(--blue);font-weight:750}
.private-note textarea{min-height:90px}


.exercise-list{display:grid;gap:8px;max-height:60vh;overflow:auto;margin-top:14px}
.exercise-row{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}
.exercise-row .status{font-size:.78rem;color:var(--muted)}
.exercise-row.completed{border-left:5px solid var(--good)}
.exercise-row.skipped{border-left:5px solid var(--warn)}
.exercise-row.open{border-left:5px solid #8a96a3}
.backup-banner{border:1px solid #d8c28a;background:#fff8e7;border-radius:14px;padding:12px 14px;margin:14px 0}
.backup-banner b{display:block;margin-bottom:4px}
.profile-meta time{display:block;font-size:.78rem;color:var(--muted);margin-top:3px}
.toolbar-split{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap}