:root{--bg:#f5f7fb;--card:#fff;--ink:#19202b;--muted:#667085;--line:#e4e7ec;--accent:#2952cc;--accent2:#0f7b6c;--buy:#0c7a4b;--sell:#b42318;--warn:#a15c00;--shadow:0 8px 28px rgba(16,24,40,.08);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}button,input{font:inherit}a{color:var(--accent)}
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.topbar-inner{max-width:1240px;margin:auto;padding:10px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}.brand{font-weight:800;white-space:nowrap}.mode{margin-left:auto;display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:#fff}.mode button{border:0;background:transparent;padding:7px 13px;cursor:pointer}.mode button.active{background:var(--ink);color:#fff}.progress{font-size:13px;color:var(--muted)}
.hero{max-width:1240px;margin:0 auto;padding:54px 20px 24px}.hero h1{font-size:clamp(30px,4.8vw,56px);line-height:1.12;margin:0 0 16px;letter-spacing:-.03em}.hero p{max-width:880px;color:var(--muted);font-size:17px}.note{background:#eef4ff;border:1px solid #c9d8ff;padding:14px 16px;border-radius:14px;color:#334155}.toolbar{max-width:1240px;margin:0 auto;padding:0 20px 24px;display:flex;gap:10px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;cursor:pointer}.filter.active{background:var(--accent);color:#fff;border-color:var(--accent)}.search{flex:1;min-width:210px;border:1px solid var(--line);border-radius:999px;padding:9px 14px;background:#fff}
.pattern-grid,.summary{max-width:1240px;margin:0 auto;padding:0 20px 28px}.pattern-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.pattern-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}.pattern-card b{display:block;margin-bottom:5px}.pattern-card p{margin:0;color:var(--muted);font-size:14px}
.case-list{max-width:1240px;margin:0 auto;padding:0 20px 60px}.case{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin:0 0 28px;overflow:hidden}.case-head{padding:22px 24px 12px;display:flex;gap:14px;align-items:flex-start}.case-no{font-size:13px;color:var(--muted);font-weight:700}.case h2{margin:2px 0 4px;font-size:clamp(22px,3vw,32px);line-height:1.25}.badges{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px}.badge{font-size:12px;font-weight:700;border-radius:999px;padding:4px 9px;background:#f2f4f7;color:#344054}.badge.buy{background:#ecfdf3;color:var(--buy)}.badge.sell{background:#fef3f2;color:var(--sell)}.badge.miss{background:#fff4e5;color:var(--warn)}.done{margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 11px;cursor:pointer;white-space:nowrap}.done.on{background:#eaf8f1;border-color:#9fd7bd;color:#12633c}
.gallery{padding:0 24px 20px}.main-img-wrap{position:relative;background:#101318;border-radius:14px;overflow:hidden;min-height:220px;display:flex;align-items:center;justify-content:center}.main-img{display:block;width:100%;height:auto;max-height:72vh;object-fit:contain;cursor:zoom-in}.img-label{position:absolute;left:10px;top:10px;background:rgba(0,0,0,.68);color:#fff;padding:4px 8px;border-radius:8px;font-size:12px}.thumbs{display:flex;gap:8px;overflow-x:auto;padding-top:10px}.thumb{flex:0 0 150px;border:2px solid transparent;border-radius:10px;overflow:hidden;padding:0;background:#fff;cursor:pointer}.thumb.active{border-color:var(--accent)}.thumb img{display:block;width:100%;aspect-ratio:2/1;object-fit:cover}.thumb span{display:block;padding:5px 7px;font-size:12px;text-align:left}.source-link{margin-left:auto;font-size:12px;white-space:nowrap}
.answer-wrap{border-top:1px solid var(--line)}.answer-toggle{width:100%;border:0;background:#f8fafc;padding:14px 24px;text-align:left;font-weight:800;cursor:pointer;display:flex;justify-content:space-between}.answer{padding:20px 24px 26px}.answer.hidden{display:none}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.panel{border:1px solid var(--line);border-radius:14px;padding:15px 16px}.panel h3{font-size:15px;margin:0 0 8px}.panel p{margin:0}.panel ul{margin:5px 0 0;padding-left:1.2em}.setup{background:#f0fdf4;border-color:#bbf7d0}.setup h3{color:#166534}.trigger{background:#fff7ed;border-color:#fed7aa}.trigger h3{color:#9a3412}.overview{grid-column:1/-1;background:#f8fafc;border-color:#cbd5e1}.overview h3{color:#334155}.education{grid-column:1/-1;background:#f0f7ff;border-color:#bad5ff}.bridge{grid-column:1/-1}.misread{background:#fff8ed}.case.exercise .answer{display:none}.case.exercise.revealed .answer{display:block}.case.exercise .answer-toggle .toggle-label:before{content:"答えを見る"}.case.exercise.revealed .answer-toggle .toggle-label:before{content:"答えを隠す"}.case:not(.exercise) .answer-toggle .toggle-label:before{content:"解説を隠す／表示"}
.summary{padding-bottom:70px}.summary-card{background:#172033;color:#fff;border-radius:18px;padding:24px}.summary-card h2{margin-top:0}.summary-card li{margin:.45em 0;color:#e8edf6}
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.92);z-index:100;display:none;align-items:center;justify-content:center;padding:20px}.lightbox.open{display:flex}.lightbox img{max-width:96vw;max-height:90vh;object-fit:contain}.lightbox button{position:absolute;top:14px;right:14px;border:0;border-radius:999px;width:42px;height:42px;font-size:24px;cursor:pointer}.empty{display:none;text-align:center;color:var(--muted);padding:40px}.footer{max-width:1240px;margin:auto;padding:0 20px 60px;color:var(--muted);font-size:13px}
@media(max-width:850px){.pattern-grid{grid-template-columns:1fr 1fr}.answer-grid{grid-template-columns:1fr}.education,.bridge{grid-column:auto}.case-head{padding:18px 16px 10px}.gallery{padding:0 16px 16px}.answer{padding:16px}.answer-toggle{padding:13px 16px}.thumb{flex-basis:120px}.mode{margin-left:0}}
@media(max-width:520px){.pattern-grid{grid-template-columns:1fr}.hero{padding-top:34px}.topbar-inner{gap:8px}.brand{width:100%}.main-img{max-height:55vh}.case h2{font-size:22px}.done{font-size:12px}}