.wrap { width: calc(100% - 64px); max-width: 1120px; margin: 0 auto; }
.site-header { height: 96px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-size: 18px; letter-spacing: -.7px; font-weight: 600; }
.brand img { width: 30px; height: 30px; }
.site-header nav { display: flex; align-items: center; gap: 30px; font-size: 12px; }
.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: space-between; gap: 25px; padding: 0 17px; background: var(--emphasis); border-radius: 8px; color: var(--emphasis-text); font-size: 12px; transition: background 160ms,transform 160ms; }
.button:active { transform: scale(.98); }
.hero { text-align: center; padding: 40px 0 49px; }
.hero h1 { font-size: clamp(52px,6.2vw,76px); font-weight: 550; line-height: 1.02; letter-spacing: -4.8px; margin: 10px 0 26px; }
.hero p { font-size: 15px; line-height: 1.65; color: var(--muted); margin: 0; }
.playground { scroll-margin-top: 24px; }
.details { padding: 78px 0 76px; display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.details h2 { font-size: 30px; font-weight: 550; letter-spacing: -1.2px; margin: 0 0 17px; }
.details-intro p { font-size: 14px; line-height: 1.65; color: var(--muted); max-width: 290px; margin: 0; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; min-height: 57px; display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 12px; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { font-size: 18px; color: var(--muted); transition: transform 200ms; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list p { font-size: 12px; line-height: 1.7; color: var(--muted); margin: 0 24px 18px 0; }
footer { border-top: 1px solid var(--line); display: flex; align-items: center; gap: 24px; padding: 24px 0 35px; font-size: 11px; color: var(--muted); }
footer .brand { font-size: 16px; color: var(--ink); }
footer .brand img { width: 25px; height: 25px; }
footer>a:last-child { margin-left: auto; }
dialog { width: min(440px,calc(100% - 32px)); padding: 36px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); color: var(--ink); box-shadow: 0 30px 100px #0003; max-height: calc(100svh - 32px); overflow: auto; }
dialog::backdrop { background: #1d202653; backdrop-filter: blur(7px); }
.dialog-close { position: absolute; right: 12px; top: 10px; min-height: 36px; min-width: 36px; font-size: 25px; color: var(--muted); }
dialog h2 { font-size: 28px; font-weight: 550; letter-spacing: -1px; line-height: 1.15; margin: 22px 0 16px; }
dialog p { font-size: 13px; line-height: 1.8; color: var(--muted); margin-bottom: 24px; }
@media (max-width: 900px) { .wrap { width: calc(100% - 48px); } .site-header { height: 82px; } .hero { padding: 35px 0 40px; } .hero h1 { font-size: 65px; letter-spacing: -3.5px; } .hero p { font-size: 14px; } .details { gap: 40px; padding: 65px 0; } }
@media (max-width: 600px) { .wrap { width: calc(100% - 32px); } .site-header { height: 76px; } .site-header .brand { font-size: 17px; gap: 5px; } .site-header nav { gap: 16px; font-size: 11px; } .site-header .button { font-size: 10px; padding: 0 11px; gap: 10px; } .hero { padding: 29px 0 32px; } .hero h1 { font-size: 53px; letter-spacing: -3px; margin-bottom: 19px; } .hero p { font-size: 12px; } .details { grid-template-columns: 1fr; gap: 26px; padding: 50px 0; } .details h2 { font-size: 30px; } .details-intro p,.faq-list p { font-size: 12px; } footer { gap: 12px; flex-wrap: wrap; font-size: 9px; } footer .brand { font-size: 15px; } dialog { padding: 30px 26px; } }
.site-header nav>a,footer>a { min-height: 44px; display: inline-flex; align-items: center; }
.site-header nav>a { min-width: 44px; justify-content: center; }
@media (max-width: 360px) { .site-header nav { gap: 10px; } .site-header .brand { font-size: 15px; } .site-header .brand img { width: 25px; height: 25px; } .site-header .button { gap: 6px; padding: 0 8px; } .hero h1 { font-size: 48px; } .hero p { font-size: 11px; } }

.theme-toggle { flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 12px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); transition: background 160ms; }
.theme-toggle:hover { background: var(--hover); }
.theme-toggle svg { width: 18px; height: 18px; flex-shrink: 0; }
@media (max-width: 480px) { .site-header nav { gap: 8px; } .site-header .brand { font-size: 14px; gap: 4px; } .site-header .brand img { width: 24px; height: 24px; } }