@font-face{font-family:Shippori Mincho Subset;font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/shippori-mincho-subset-400.woff2) format("woff2")}@font-face{font-family:Shippori Mincho Subset;font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/shippori-mincho-subset-700.woff2) format("woff2")}:root{--bg: #ece7da;--paper: #fffdf8;--paper-deep: #f8f1e4;--ink: #292826;--ink-strong: #171614;--ink-dim: #6d6860;--accent: #a9472a;--accent-2: #d47a45;--accent-deep: #7d321d;--accent-soft: #f8ebe2;--section-strip: #f1e7d7;--box: #f7efe2;--box-border: #e4d7c2;--teal: #243f47;--teal-soft: #e5eef0;--sage: #6d7c55;--sage-soft: #edf2e6;--butter: #fbf0ce;--butter-border: #ecdcab;--green: #2f7d4f;--green-bg: #e8f3ec;--green-border: #bfe0cc;--red: #c0392b;--red-bg: #fbeae8;--rule: #e0d6c5;--shadow-soft: 0 8px 28px rgba(53, 45, 34, .06);--shadow-card: 0 1px 2px rgba(70, 54, 34, .06);--paper-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)' opacity='0.1'/%3E%3C/svg%3E");--radius: 10px;--maxw: 1040px;--sheetw: 900px;--jp: "Shippori Mincho Subset", "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", "Songti SC", serif;--ui: -apple-system, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}body{margin:0;background:#f1eee7;color:var(--ink);font-family:var(--ui);line-height:1.75;-webkit-font-smoothing:antialiased}[lang=ja]{font-family:var(--jp)}.dim{color:var(--ink-dim)}a{color:var(--accent);text-decoration:none}button,input,textarea{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid color-mix(in srgb,var(--teal) 75%,white);outline-offset:3px}#root{max-width:var(--maxw);margin:0 auto;background-color:var(--paper);min-height:100vh;padding:30px clamp(18px,3.8vw,46px) 92px;box-shadow:var(--shadow-soft);border-left:1px solid var(--rule);border-right:1px solid var(--rule)}.home,.article.sheet{max-width:var(--sheetw);margin:0 auto}.home-hero{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;padding:28px 30px 24px;margin-bottom:24px;border:1px solid var(--box-border);border-radius:10px;background:#fffdf9;box-shadow:var(--shadow-card);overflow:hidden}.home-hero-text{position:relative;z-index:1;min-width:0}.home-hero h1{position:relative;z-index:1;font-family:var(--jp);font-size:clamp(1.85rem,4vw,2.7rem);margin:0;color:var(--ink-strong);line-height:1.12}.home-hero p{position:relative;z-index:1;margin:8px 0 0}.jlpt-next{position:relative;z-index:1;flex:none;display:flex;flex-direction:column;gap:2px;padding:12px 16px;border:1px solid var(--butter-border);border-radius:10px;background:var(--butter);text-align:right;line-height:1.4;white-space:nowrap}.jlpt-next-label{font-size:.72rem;font-weight:700;letter-spacing:.04em;color:var(--accent-deep)}.jlpt-next-date{font-family:var(--jp);font-size:1.05rem;font-weight:700;color:var(--ink-strong)}.jlpt-next-left{font-size:.8rem;color:var(--ink-dim)}.jlpt-next-left strong{font-size:1rem;color:var(--accent)}.article-list{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}.article-card{position:relative;display:block;height:100%;background:#fffdf8b8;border:1px solid var(--box-border);border-radius:var(--radius);padding:18px 18px 16px;color:var(--ink);box-shadow:0 1px #ffffffd1 inset;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;overflow:hidden}.article-card:before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--teal)}.article-card:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 52%,var(--box-border));box-shadow:0 5px 16px #46362212}.article-card-top{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:.82rem}.article-card-tags{display:inline-flex;align-items:center;gap:8px;min-width:0}.article-card h2{font-family:var(--jp);margin:10px 0 6px;font-size:1.25rem;color:var(--ink-strong)}.article-card p{margin:0}.article-card-date{margin-top:8px;font-size:.78rem}.home-foot{text-align:center;margin-top:32px;font-size:.85rem}.read-badge{font-size:.7rem;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--green-bg);color:var(--green);border:1px solid var(--green-border);white-space:nowrap}.article-card.is-read:before{background:var(--green)}.article-card.is-read h2{color:var(--ink)}.list-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px}.list-toolbar-label{font-size:.82rem}.sort-seg{display:inline-flex;padding:2px;border:1px solid var(--box-border);border-radius:999px;background:#fffdf8b8}.sort-seg-btn{font-family:var(--ui);font-size:.82rem;padding:4px 14px;border:0;border-radius:999px;background:transparent;color:var(--ink-dim);cursor:pointer;transition:background .16s ease,color .16s ease}.sort-seg-btn:hover{color:var(--ink)}.sort-seg-btn.is-active{background:var(--teal);color:#fff;box-shadow:0 2px 8px #243f4729}.level-tag{font-size:.72rem;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--teal);color:#fff;letter-spacing:.3px;white-space:nowrap;box-shadow:0 2px 8px #243f4729}.level-pill{display:inline-block;vertical-align:middle;margin-left:12px;background:var(--teal);color:#fff;font-family:var(--ui);font-size:.72rem;font-weight:700;padding:3px 12px;border-radius:999px;letter-spacing:.3px}.sheet-top{position:relative;margin:0 0 24px;padding:16px 18px 18px;border:1px solid var(--box-border);border-radius:10px;background:#fffdf9;box-shadow:var(--shadow-card);overflow:hidden}.sheet-top>*{position:relative;z-index:1}.back{font-size:.9rem;display:inline-block;margin-bottom:14px}.kicker{font-family:var(--jp);font-size:.74rem;font-weight:700;color:var(--ink-dim);letter-spacing:1px;margin:0 0 6px}.sheet-title{font-family:var(--jp);font-size:clamp(1.55rem,3vw,2.25rem);margin:0 0 6px;line-height:1.32;color:var(--ink-strong)}.sheet-sub{font-size:.82rem;margin:0;line-height:1.6}.section-head{display:grid;grid-template-columns:auto 1fr;align-items:center;gap:12px;margin:30px 0 12px;padding:0 0 9px;background:transparent;border-bottom:1px solid var(--rule)}.section-num{flex:none;width:30px;height:30px;border-radius:8px;background:var(--accent);color:#fff;font-weight:700;font-size:.9rem;display:grid;place-items:center;box-shadow:none}.section-title{font-size:1.08rem;margin:0;color:var(--ink-strong);font-weight:800}.read-controls{position:sticky;top:0;z-index:20;margin:0 0 12px;display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:8px;border:1px solid rgba(228,215,194,.86);border-radius:10px;background:#fffdf9f5;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:var(--shadow-card)}.read-controls-label{font-size:.9rem}.seg{display:inline-flex;border:1px solid var(--box-border);border-radius:999px;overflow:hidden;background:#fff}.seg-btn{border:none;background:#fff;color:var(--ink-dim);padding:5px 13px;font-size:.82rem;cursor:pointer;border-right:1px solid var(--box-border);transition:background .15s ease,color .15s 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ease}.player-step:hover:not(:disabled){background:var(--teal-soft);color:var(--teal);border-color:color-mix(in srgb,var(--teal) 35%,var(--box-border))}.player-step:disabled{opacity:.3;cursor:default}.player-play{flex:none;width:42px;height:42px;border-radius:999px;background:var(--accent);color:#fff;border:none;cursor:pointer;font-size:.95rem;line-height:1;display:grid;place-items:center;box-shadow:0 4px 12px #a9472a38;transition:background .15s ease,transform .1s ease}.player-play:hover{background:var(--accent-deep)}.player-play:active{transform:scale(.94)}.player-main{min-width:0;display:grid;gap:3px}.player-meta{display:flex;align-items:center;justify-content:space-between;gap:12px}.player-para{min-width:0;font-size:.82rem;font-weight:800;color:var(--accent-deep);white-space:nowrap}.player-time{flex:none;font-size:.74rem;font-variant-numeric:tabular-nums;min-width:78px;text-align:right;color:var(--ink)}.player-seek{width:100%;display:block;min-width:50px;height:28px;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;margin:0;outline-offset:2px;touch-action:none}.player-seek:disabled{opacity:.5;cursor:default}.player-seek::-webkit-slider-runnable-track{height:8px;border-radius:999px;background:linear-gradient(to right,var(--accent) var(--pct, 0%),transparent var(--pct, 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