:root{color-scheme:dark;--bg: #050505;--ink: #ffffff;--muted: #d4ccd2;--subtle: #8a8a86;--card: #151515;--card-strong: #0c0c0c;--line: #3b2b3b;--pink: #f27a82;--purple: #a932b6;--neon-purple: #d74ce4;--yellow: #dfe85a;--good: #aebc63;--bad: #ff7f85;--logo-bg: linear-gradient(135deg, #080708 0%, #151015 58%, #211020 100%);--shadow: 0 18px 42px rgba(215, 76, 228, .13);--hard-shadow: 5px 5px 0 #000000;--font-display: "Avenir Next", "Helvetica Neue", "Noto Sans JP", "Zen Kaku Gothic New", system-ui, sans-serif;--font-body: "Noto Sans JP", "Zen Kaku Gothic New", "M PLUS 1p", system-ui, -apple-system, sans-serif}:root[data-theme=light]{color-scheme:light;--bg: #fff7ed;--ink: #20161f;--muted: #51494f;--subtle: #6d686a;--card: #ffffff;--card-strong: #fffefa;--line: #ead9df;--pink: #df6573;--purple: #8f2aa3;--neon-purple: #b33bc4;--yellow: #c7d238;--good: #7f8d34;--bad: #df6573;--logo-bg: linear-gradient(135deg, #fff2f1 0%, #fff9df 55%, #f6e9ff 100%);--shadow: 0 16px 34px rgba(143, 42, 163, .14);--hard-shadow: 5px 5px 0 rgba(57, 39, 53, .16)}*{box-sizing:border-box}html{min-width:320px;background:var(--bg);color:var(--ink);font-family:var(--font-body)}body{min-width:320px;margin:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.024) 0 1px,transparent 1px 18px),radial-gradient(circle at 1px 1px,rgba(255,255,255,.09) 1px,transparent 0),var(--bg);background-size:auto,22px 22px,auto}:root[data-theme=light] body{background:repeating-linear-gradient(135deg,rgba(5,5,5,.026) 0 1px,transparent 1px 18px),radial-gradient(circle at 1px 1px,rgba(5,5,5,.06) 1px,transparent 0),var(--bg);background-size:auto,22px 22px,auto}a{color:inherit}img{max-width:100%}main{min-height:70vh}.site-header,.site-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;width:min(1120px,calc(100% - 32px));margin:0 auto}.site-header{position:sticky;top:0;z-index:20;padding:14px 0;border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px)}.brand{display:inline-flex;align-items:center;gap:10px;min-height:40px;padding:4px 7px;border:1px solid color-mix(in srgb,var(--pink) 70%,var(--line));border-radius:6px;background:var(--logo-bg);box-shadow:3px 3px color-mix(in srgb,var(--purple) 56%,#000000);text-decoration:none;transition:opacity .18s ease,transform .18s ease}.brand-wordmark{width:132px;height:auto}:root.has-hero-brand:not(.is-scrolled) .brand{opacity:0;pointer-events:none;transform:translateY(-8px) scale(.96)}.site-nav,.site-footer nav{display:flex;flex-wrap:wrap;gap:12px;color:var(--muted);font-size:.9rem;font-weight:800}.site-nav a,.site-footer a{padding-bottom:4px;border-bottom:2px solid transparent;text-decoration:none}.site-nav a:hover,.site-footer a:hover,.back-link:hover{border-color:var(--yellow);color:var(--yellow)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 12px;border:2px solid color-mix(in srgb,var(--yellow) 76%,var(--line));border-radius:4px;background:var(--card);color:var(--ink);cursor:pointer;font-family:var(--font-display);font-size:.76rem;font-weight:900;letter-spacing:0;box-shadow:3px 3px color-mix(in srgb,var(--pink) 46%,#000000);transition:background .16s ease,color .16s ease,transform .16s ease,box-shadow .16s ease}:root[data-theme=light] .theme-toggle{border-color:#151217;background:#151217;color:#fff}:root[data-theme=dark] .theme-toggle{border-color:color-mix(in srgb,var(--yellow) 72%,#ffffff);background:#fff8eb;color:#1d151c}.theme-toggle:hover{transform:translate(1px,1px);box-shadow:2px 2px 0 var(--pink),0 0 16px color-mix(in srgb,var(--yellow) 64%,transparent)}.theme-toggle-mark{width:12px;height:12px;background:var(--yellow);box-shadow:0 0 8px color-mix(in srgb,var(--yellow) 55%,transparent)}:root[data-theme=light] .theme-toggle-mark{border:1px solid color-mix(in srgb,var(--pink) 76%,#ffffff);background:#050505;box-shadow:0 0 0 2px #ff7f8533}:root[data-theme=dark] .theme-toggle-mark{background:#fff;box-shadow:0 0 8px color-mix(in srgb,var(--yellow) 42%,transparent)}.home-intro{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(300px,.92fr);align-items:center;gap:38px;width:min(1120px,calc(100% - 32px));margin:26px auto 0;padding:42px 0 54px}.home-copy,.play-header,.page-shell,.article-shell{position:relative}.home-copy h1,.page-shell h1,.article-shell h1,.play-header h1{margin:0;color:var(--ink);font-family:var(--font-display);font-weight:900;font-size:clamp(2.25rem,7vw,5.1rem);line-height:1.03;letter-spacing:0}.hero-logo-frame{display:inline-grid;width:fit-content;max-width:100%;margin-bottom:24px;padding:14px 16px;border:2px solid var(--pink);border-radius:6px;background:var(--logo-bg);box-shadow:var(--hard-shadow)}.hero-logo{display:block;width:min(360px,72vw);height:auto}.hero-title{display:block;max-width:760px;font-weight:900;text-shadow:0 2px 0 color-mix(in srgb,var(--pink) 32%,transparent),0 0 18px color-mix(in srgb,var(--neon-purple) 18%,transparent)}.hero-title span{display:inline}@media(min-width:835px){.hero-title span{display:block}}.lead,.article-description,.page-shell>p,.play-header>p{color:var(--muted);font-size:1.1rem;line-height:1.85}.eyebrow,.article-kicker{margin:0 0 12px;color:var(--yellow);font-family:var(--font-display);font-size:.8rem;font-weight:900;letter-spacing:0;text-transform:uppercase}.home-actions,.result-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border:3px solid var(--pink);border-radius:4px;background:var(--card);color:var(--ink);cursor:pointer;font-family:var(--font-display);font-size:.92rem;font-weight:900;letter-spacing:0;text-decoration:none;box-shadow:5px 5px #000}.button.primary{border-color:var(--yellow);background:var(--yellow);color:#050505}.button.secondary{border-color:var(--neon-purple);background:color-mix(in srgb,var(--card) 82%,var(--purple));color:var(--ink)}:root[data-theme=light] .button.secondary{background:#fff;color:var(--ink)}.button:hover{transform:translate(2px,2px);box-shadow:2px 2px #000,0 0 14px color-mix(in srgb,var(--neon-purple) 34%,transparent)}.home-panel,.quiz-machine{border:3px solid var(--pink);border-radius:8px;background:var(--card);box-shadow:var(--hard-shadow),var(--shadow)}.today-card{background:linear-gradient(145deg,#0b0b0c,#141014 66%,#100712)}:root[data-theme=light] .today-card{background:linear-gradient(145deg,#fff7ef,#fffdf0 58%,#fbecff)}.today-card{display:grid;gap:18px;padding:24px}.machine-label,.quiz-number{width:fit-content;padding:5px 9px;background:var(--yellow);color:#050505;font-family:var(--font-display);font-size:.78rem;font-weight:900;text-transform:uppercase}.today-card h2{margin:0;color:var(--pink);font-family:var(--font-display);font-size:clamp(1.9rem,4.6vw,3.2rem);font-weight:900;line-height:1.04;letter-spacing:0}.today-card p,.quiz-card p,.plain-band p,.article-body,.site-footer p,.feedback-panel p,.result-panel p{color:var(--muted);line-height:1.8}.category-lanes{display:grid;gap:10px}.level-lanes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.category-block{display:grid;gap:12px;margin-top:2px;padding-top:18px;border-top:1px solid color-mix(in srgb,var(--line) 78%,transparent)}.category-block h3{margin:0;color:var(--ink);font-family:var(--font-display);font-size:1.25rem;font-weight:900}.category-block p{margin:0}.category-block .category-lanes{grid-template-columns:repeat(2,minmax(0,1fr))}.level-lanes a,.category-lanes a,.difficulty-lanes a,.setup-grid label{display:grid;gap:4px;align-content:center;padding:12px;border:2px solid color-mix(in srgb,var(--purple) 82%,var(--line));border-radius:6px;background:color-mix(in srgb,var(--card) 70%,#050505);color:var(--ink);font-family:var(--font-display);text-decoration:none;box-shadow:inset 0 0 12px #d74ce426}.level-lanes a{min-height:82px;border-color:color-mix(in srgb,var(--yellow) 70%,var(--purple))}.category-lanes a,.setup-grid label{min-height:68px}.difficulty-lanes a{min-height:42px;padding:9px 12px;color:var(--pink);font-size:.82rem;font-weight:900}:root[data-theme=light] .category-lanes a,:root[data-theme=light] .level-lanes a,:root[data-theme=light] .difficulty-lanes a,:root[data-theme=light] .setup-grid label{background:color-mix(in srgb,var(--card) 86%,var(--pink))}.level-lanes a:hover,.category-lanes a:hover,.difficulty-lanes a:hover,.setup-grid label:has(input:checked){border-color:var(--pink)}.level-lanes span,.category-lanes span,.setup-grid span{color:var(--yellow);font-size:.92rem;font-weight:900}.level-lanes span,.level-setup span{font-size:1.24rem}:root[data-theme=light] .level-lanes span,:root[data-theme=light] .category-lanes span,:root[data-theme=light] .setup-grid span{color:var(--purple)}.level-lanes small,.category-lanes small,.setup-grid small{color:var(--muted);font-family:var(--font-body);font-size:.82rem;font-weight:700}.section,.page-shell,.article-shell,.plain-band,.play-shell{width:min(960px,calc(100% - 32px));margin:0 auto}.section,.plain-band,.play-shell{padding:58px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.section-heading h2,.plain-band h2,.page-shell h2,.result-panel h2{margin:0;color:var(--ink);font-family:var(--font-display);font-size:clamp(1.7rem,4vw,2.6rem);font-weight:900;letter-spacing:0}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.quiz-card{display:flex;min-height:236px;flex-direction:column;justify-content:space-between;gap:18px;padding:22px;border:3px solid var(--purple);border-radius:7px;background:var(--card);text-decoration:none;box-shadow:5px 5px #000}.quiz-card:hover{border-color:var(--pink);box-shadow:3px 3px #000,0 0 16px color-mix(in srgb,var(--neon-purple) 28%,transparent)}.quiz-card span{width:fit-content;padding:5px 9px;border-radius:0;background:var(--yellow);color:#050505;font-family:var(--font-display);font-size:.78rem;font-weight:900}.quiz-card h2{margin:0;color:var(--ink);font-size:1.22rem;line-height:1.45;letter-spacing:0}.plain-band{border-top:2px solid var(--line);border-bottom:2px solid var(--line);background:color-mix(in srgb,var(--card) 72%,transparent)}.page-shell{padding:72px 0}.page-shell.wide{width:min(1120px,calc(100% - 32px))}.page-shell .card-grid{margin-top:28px}.article-shell{padding:56px 0 80px}.back-link{display:inline-block;margin-bottom:28px;color:var(--yellow);font-weight:800;text-decoration:none}.article-body{max-width:760px;margin-top:34px;font-size:1.06rem}.article-body h2{margin-top:38px;color:var(--ink);font-size:1.55rem;letter-spacing:0}.article-body li+li{margin-top:8px}.answer-box{margin-top:40px;padding:20px;border:3px solid var(--purple);border-radius:6px;background:var(--card)}.answer-box summary{cursor:pointer;color:var(--yellow);font-family:var(--font-display)}.answer-box p{margin-bottom:0}.play-shell{width:min(980px,calc(100% - 32px))}.play-header{max-width:780px;margin-bottom:28px}.round-setup{display:grid;gap:22px;margin-bottom:24px;padding:18px;border:3px solid var(--pink);border-radius:8px;background:var(--card);box-shadow:var(--hard-shadow),var(--shadow)}.setup-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.setup-grid label{cursor:pointer}.level-setup label{min-height:86px;border-color:color-mix(in srgb,var(--yellow) 70%,var(--purple))}.category-setup label{min-height:64px}.setup-grid input{position:absolute;opacity:0;pointer-events:none}.setup-grid label:has(input:focus-visible){outline:3px solid var(--yellow);outline-offset:3px}.round-summary{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:18px}.round-summary p{margin:0;color:var(--muted);font-weight:800}.quiz-machine{padding:18px}.quiz-status{display:flex;justify-content:space-between;gap:12px;margin-bottom:14px;color:var(--yellow);font-family:var(--font-display);font-size:.84rem}.quiz-screen,.feedback-panel,.result-panel{padding:22px;border:2px solid var(--line);border-radius:6px;background:color-mix(in srgb,var(--card-strong) 84%,var(--purple))}.quiz-screen h2{margin:16px 0 22px;color:var(--ink);font-size:clamp(1.35rem,4vw,2.3rem);line-height:1.45;letter-spacing:0}.choice-grid{display:grid;gap:12px}.choice-button{display:grid;grid-template-columns:44px 1fr;align-items:center;gap:12px;min-height:62px;padding:8px 12px;border:3px solid var(--purple);border-radius:5px;background:var(--card);color:var(--ink);cursor:pointer;text-align:left;box-shadow:4px 4px #000}.choice-button span{display:grid;width:36px;height:36px;place-items:center;background:color-mix(in srgb,var(--pink) 82%,var(--card));color:#050505;font-family:var(--font-display)}.choice-button strong{font-size:1rem;line-height:1.5}.choice-button:hover:not(:disabled){border-color:var(--yellow);transform:translate(2px,2px);box-shadow:2px 2px #000,0 0 14px color-mix(in srgb,var(--yellow) 28%,transparent)}.choice-button:disabled{cursor:default}.choice-button.is-correct{border-color:var(--good);background:color-mix(in srgb,var(--good) 9%,var(--card))}.choice-button.is-wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 13%,var(--card))}.feedback-panel{margin-top:14px}.feedback-panel[data-state=correct]{border-color:var(--good)}.feedback-panel[data-state=wrong]{border-color:var(--bad)}.feedback-panel .feedback-title{width:fit-content;margin:0 0 12px;padding:5px 10px;border:2px solid color-mix(in srgb,var(--pink) 76%,var(--line));border-radius:4px;background:color-mix(in srgb,var(--card) 80%,var(--pink));color:var(--pink);font-family:var(--font-display);font-size:1.08rem;font-weight:900;line-height:1.2}.feedback-panel a{display:inline-flex;margin:8px 0 18px;color:var(--pink);font-weight:900}.result-panel{text-align:center}.result-rank{width:fit-content;margin:18px auto;padding:8px 12px;background:color-mix(in srgb,var(--yellow) 82%,var(--card));color:#050505;font-family:var(--font-display);font-size:1.1rem;font-weight:900}.result-actions{justify-content:center}.site-footer{align-items:flex-start;padding:34px 0 42px;border-top:2px solid var(--line);color:var(--muted)}.site-footer strong{color:var(--ink);font-family:var(--font-display);font-weight:900}@media(max-width:1024px){.home-intro{grid-template-columns:1fr}}@media(max-width:834px){.site-header,.site-footer{align-items:flex-start;flex-direction:column}.site-nav{width:100%}.home-intro{padding-top:30px}.card-grid{grid-template-columns:1fr}.section-heading{display:block}.category-block .category-lanes,.level-lanes{grid-template-columns:1fr}}@media(max-width:480px){.site-header{gap:12px}.brand-wordmark{width:136px}.home-copy h1,.page-shell h1,.article-shell h1,.play-header h1{font-size:2.35rem}.hero-logo-frame{padding:10px}.hero-logo{width:min(310px,78vw)}.choice-button{grid-template-columns:38px 1fr;padding:8px}.setup-grid{grid-template-columns:1fr}.round-summary{align-items:stretch;flex-direction:column}}