:root{--paper:#fbfbf7;--grid:#dde8ef;--surface:#fff;--ink:#1f2328;--ink-2:#4a5259;--ink-3:#747d85;--line:#e2e6ea;--line-strong:#c8cfd5;--blue:#00a0e9;--blue-deep:#0071b3;--blue-soft:#e3f4fc;--mark:#ffe27a;--violet:#5a51c4;--violet-soft:#eeecfb;--gray-soft:#f1f3f5;--amber:#8f5300;--amber-soft:#fff3dc;--green:#1b6f42;--green-soft:#e5f4ea;--red:#b3261e;--red-soft:#fdeceb;--star:#f2a900;--note-yellow:#fff1a8;--note-pink:#ffd8e1;--note-blue:#d4ebff;--note-green:#d5f2dc;--note-orange:#ffe0bf;--border:2px solid var(--ink);--shadow:4px 4px 0 var(--ink);--shadow-sm:3px 3px 0 var(--ink);--font-display:"IBM Plex Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;--font-body:"Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Meiryo", sans-serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--radius:12px;--radius-sm:8px;--header-h:64px;--gutter:20px;--measure:760px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}body{color:var(--ink);font-family:var(--font-body);letter-spacing:.01em;overflow-wrap:anywhere;background:linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 24px 24px, linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 24px 24px, var(--paper);margin:0;font-size:16px;line-height:1.8}img,video{max-width:100%;height:auto}a{color:var(--blue-deep);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{color:var(--ink)}:focus-visible{outline:3px solid color-mix(in srgb, var(--blue) 60%, transparent);outline-offset:2px;border-radius:4px}.container{width:min(100%,1120px);padding-inline:var(--gutter);margin-inline:auto}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}.btn{border:var(--border);background:var(--surface);min-height:48px;color:var(--ink);box-shadow:var(--shadow-sm);font-family:var(--font-display);text-align:center;cursor:pointer;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:10px 22px;font-size:1rem;font-weight:700;line-height:1.3;text-decoration:none;transition:transform .12s,box-shadow .12s;display:inline-flex}.btn:hover{color:var(--ink);box-shadow:4px 4px 0 var(--ink);transform:translate(-1px,-1px)}.btn:active{box-shadow:1px 1px 0 var(--ink);transform:translate(2px,2px)}.btn--blue{background:var(--blue);color:#fff}.btn--blue:hover{color:#fff}.btn--yellow{background:var(--mark)}.btn--line{color:#fff;background:#06c755}.btn--line:hover{color:#fff}.btn--small{min-height:38px;padding:6px 14px;font-size:.88rem}.site-header{z-index:50;height:var(--header-h);background:var(--surface);border-bottom:var(--border);position:sticky;top:0}.site-header__inner{align-items:center;gap:20px;height:100%;display:flex}.brand{flex:none;align-items:center;display:flex}.brand img{width:auto;height:40px;display:block}.site-nav{gap:2px;margin-right:auto;display:flex}.site-nav a{color:var(--ink);white-space:nowrap;border-radius:8px;padding:6px 10px;font-size:.9rem;font-weight:700;text-decoration:none}.site-nav a:hover,.site-nav a[aria-current=page]{background:var(--blue-soft)}.header-actions{flex:none;align-items:center;gap:8px;display:flex}.icon-button{border:var(--border);background:var(--surface);width:40px;height:40px;color:var(--ink);cursor:pointer;border-radius:10px;place-items:center;display:inline-grid}.menu-button{display:none}.drawer{border:0;border-left:var(--border);background:var(--surface);width:min(86vw,360px);height:100dvh;max-height:none;color:var(--ink);margin:0 0 0 auto;padding:0}.drawer::backdrop{background:#1f232866}.drawer__head{height:var(--header-h);border-bottom:var(--border);justify-content:space-between;align-items:center;padding:0 16px;font-weight:700;display:flex}.drawer__body{padding:8px 16px 32px}.drawer__group{color:var(--ink-3);letter-spacing:.08em;margin:18px 0 6px;font-size:.75rem;font-weight:700}.drawer__body a{color:var(--ink);border-bottom:1px solid var(--line);padding:10px 4px;font-weight:600;text-decoration:none;display:block}@media (width<=960px){.site-nav{display:none}.menu-button{display:inline-grid}.brand{margin-right:auto}}@media (width<=480px){:root{--gutter:16px;--header-h:58px}.brand img{height:34px}.header-actions .btn{padding-inline:12px}}.site-footer{background:var(--ink);color:#c9cfd5;margin-top:96px;font-size:.88rem}.site-footer a{color:#eef1f4;text-decoration:none}.site-footer a:hover{color:#fff;text-decoration:underline}.site-footer__grid{grid-template-columns:1.2fr 2fr;gap:48px;padding-block:56px 32px;display:grid}.site-footer__about p{margin:14px 0 0}.site-footer__logo{background:#fff;border-radius:8px;padding:6px 10px;display:inline-block}.site-footer__logo img{width:auto;height:36px;display:block}.footer-links{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.footer-links h2{letter-spacing:.08em;color:#98a2ab;margin:0 0 8px;font-size:.78rem}.footer-links ul{gap:6px;margin:0;padding:0;list-style:none;display:grid}.site-footer__bottom{color:#98a2ab;border-top:1px solid #ffffff24;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-block:20px 32px;display:flex}@media (width<=800px){.site-footer__grid{grid-template-columns:1fr;gap:32px}.footer-links{grid-template-columns:1fr 1fr}}.section{margin-top:88px}.section__head{text-align:center;margin-bottom:28px}.section__title{font-family:var(--font-display);background:linear-gradient(transparent 62%, var(--mark) 62%);margin:0;padding:0 6px;font-size:clamp(1.4rem,3.2vw,1.9rem);font-weight:700;line-height:1.45;display:inline-block}.section__lead{max-width:44em;color:var(--ink-2);margin:12px auto 0}.card{border:var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);position:relative}.tape{background:color-mix(in srgb, var(--blue) 45%, transparent);border-left:2px dashed #fff9;border-right:2px dashed #fff9;width:92px;height:24px;position:absolute;top:-12px;transform:rotate(-4deg)}.tape--right{background:color-mix(in srgb, var(--mark) 80%, transparent);right:24px;transform:rotate(5deg)}.tape--left{left:24px}.chip{border:1.5px solid var(--ink);background:var(--surface);white-space:nowrap;border-radius:999px;align-items:center;gap:4px;padding:2px 10px;font-size:.75rem;font-weight:700;display:inline-flex}.chip--free{background:var(--note-green)}.chip--blue{background:var(--blue-soft)}.breadcrumbs{color:var(--ink-3);flex-wrap:wrap;gap:4px 6px;margin:0;padding:0;font-size:.8rem;list-style:none;display:flex}.breadcrumbs li+li:before{content:"/";color:var(--line-strong);margin-right:6px}.breadcrumbs a{color:var(--ink-2);text-decoration:none}.breadcrumbs a:hover{color:var(--blue-deep)}.page-head{padding-block:36px 24px}.page-head h1{font-family:var(--font-display);margin:10px 0 0;font-size:clamp(1.6rem,3.5vw,2.2rem);line-height:1.4}.page-head p{color:var(--ink-2);max-width:60ch;margin:10px 0 0}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}[hidden]{display:none!important}