/* RETROLABO site theme — Claude Design「Retrolabo Site」の helmet スタイルとインライン指定をクラス化したもの。
   トークンと基本部品は modernist.css（同デザインシステム）に置き、ここでは色の上書きとサイト固有の部品だけを持つ。 */
:root{
--color-bg:#ff7a29;
--color-surface:#ff9757;
--color-text:#ffffff;
--color-divider:color-mix(in srgb, #ffffff 58%, transparent);
--color-accent:#4a1400;
--color-accent-2:#4a1400;
--color-accent-100:#fff2e8;--color-accent-200:#ffdcc4;--color-accent-300:#ffbd93;--color-accent-400:#ff9455;--color-accent-500:#ef5f14;--color-accent-600:#a82300;--color-accent-700:#8a1c00;--color-accent-800:#631400;--color-accent-900:#3d1004;
--color-accent-2-100:#fff2e8;--color-accent-2-200:#ffdcc4;--color-accent-2-300:#ffbd93;--color-accent-2-400:#ff9455;--color-accent-2-500:#ef5f14;--color-accent-2-600:#a82300;--color-accent-2-700:#8a1c00;--color-accent-2-800:#631400;--color-accent-2-900:#3d1004;
--color-neutral-100:#fff4ea;--color-neutral-200:#ffd9b8;--color-neutral-300:#f0b98b;--color-neutral-400:#d1966a;--color-neutral-500:#a9714a;--color-neutral-600:#865634;--color-neutral-700:#6a4226;--color-neutral-800:#4a2d18;--color-neutral-900:#2a1810;
--mono:ui-monospace,Menlo,monospace;
--sans:"Archivo","Noto Sans JP",system-ui,sans-serif;
}
html{-webkit-text-size-adjust:100%;background:#ff7a29}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--sans);font-size:15px}
h1,h2,h3,h4,h5,h6{font-family:var(--sans)}
a{color:#ffffff;text-decoration:underline;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
.btn-primary{background:var(--color-accent);color:#fff}
.btn-primary:hover{background:#330d00}
.btn-primary:active{background:#240900}
.btn-secondary{border:2px solid var(--color-divider);color:#ffffff}
.btn-secondary:hover{background:color-mix(in srgb, #ffffff 18%, transparent)}
.btn{text-decoration:none}
.tag{border-radius:0}
.tag-accent{background:var(--color-accent);color:#fff}
.tag-neutral{background:transparent;color:#ffffff;border:1px solid var(--color-divider)}
.table th{color:#ffffff;border-bottom:2px solid var(--color-divider);text-align:left;vertical-align:top}
.table td{border-bottom:1px solid var(--color-divider);vertical-align:top}
.table tbody tr:hover{background:color-mix(in srgb, #ffffff 10%, transparent)}
.tablewrap{overflow-x:auto}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
.sec{border-top:2px solid var(--color-divider);padding-block:64px}
.sec-first{padding-block:72px 64px}
.kick{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#ffffff;margin:0 0 20px}
.h1{font-size:clamp(33px,5.4vw,66px);letter-spacing:-.025em;line-height:1.1;margin:0 0 26px;max-width:22ch}
.h2{font-size:clamp(23px,3.4vw,38px);letter-spacing:-.02em;margin:0 0 12px}
.lead{font-size:17px;line-height:1.9;max-width:60ch;margin:0 0 30px}
.body{max-width:56ch;font-size:15px;line-height:1.85;margin:0 0 30px}
.note{font-size:12px;line-height:1.7;color:color-mix(in srgb, #ffffff 82%, transparent);margin:18px 0 0}
.cells{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(248px,100%),1fr));gap:2px;background:var(--color-divider);border:2px solid var(--color-divider)}
.cells-wide{grid-template-columns:repeat(auto-fit,minmax(min(280px,100%),1fr))}
.cell{background:var(--color-bg);padding:28px 24px;display:flex;flex-direction:column;gap:10px}
.cell-lg{padding:32px 28px;gap:14px}
.cell-md{padding:30px 26px}
.cell h3,.cell h4{margin:0}
.cell p{margin:0;font-size:14px;line-height:1.85}
.cellno{font:700 11px/1 var(--mono);letter-spacing:.12em;color:#ffffff}
.poster{background:var(--color-accent);padding:92px 0}
.poster .pt{font-size:clamp(28px,4.8vw,58px);line-height:1.12;letter-spacing:-.02em;color:#fff;margin:0 0 18px;max-width:24ch;font-weight:800}
.poster .ps{font-size:15px;line-height:1.85;color:#fff;margin:0;max-width:52ch}
.btnrow{display:flex;flex-wrap:wrap;gap:12px}
.legal h3{font-size:18px;margin:38px 0 10px;max-width:70ch}
.legal p{font-size:14px;line-height:1.95;margin:0 0 12px;max-width:74ch}
.legal ul{margin:0 0 14px;padding-left:1.25em;max-width:74ch}
.legal li{font-size:14px;line-height:1.95;margin-bottom:4px}
.legal h3:first-of-type{margin-top:0}
@media(min-width:900px){.legal>.wrap{padding-left:calc(28px + 19%)}}
.navlink{font-size:13.5px;font-weight:500;color:var(--color-text);text-decoration:none;white-space:nowrap}
.navlink:hover{color:var(--color-accent)}
.navlink[aria-current="page"]{text-decoration:underline;text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
::selection{background:#ffffff;color:var(--color-accent)}

/* layout */
.page{min-height:100vh;display:flex;flex-direction:column;background:var(--color-bg)}
.page>main{flex:1}
.site-header{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:var(--color-bg);border-bottom:2px solid var(--color-divider)}
.site-header .wrap{display:flex;align-items:center;gap:24px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px}
.brand{font-weight:800;font-size:20px;letter-spacing:-.01em;color:var(--color-text);text-decoration:none;margin-right:auto}
.site-nav{display:flex;flex-wrap:wrap;gap:22px;align-items:center}
.langsw{display:flex;border:2px solid var(--color-divider)}
.langsw a{font:700 12px/1 'Archivo',sans-serif;letter-spacing:.06em;padding:7px 11px;text-decoration:none;color:var(--color-text)}
.langsw a+a{border-left:2px solid var(--color-divider)}
.langsw a[aria-current="true"]{background:var(--color-accent);color:#fff}
.site-footer{border-top:2px solid var(--color-divider);background:var(--color-bg)}
.site-footer .cols{padding-top:44px;padding-bottom:44px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr));gap:32px;align-items:start}
.site-footer .col{display:flex;flex-direction:column;gap:9px}
.site-footer .fbrand{font-weight:800;font-size:19px;letter-spacing:-.01em}
.site-footer .faddr{font-size:13px;line-height:1.7}
.site-footer .copy{border-top:1px solid var(--color-divider);padding-top:18px;padding-bottom:26px;font-size:12px;color:color-mix(in srgb, #ffffff 82%, transparent)}

/* home: hero puzzle */
.hero-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(310px,100%),1fr));gap:44px;align-items:start}
.puzzle{border:2px solid var(--color-divider);background:var(--color-accent);padding:18px;display:flex;flex-direction:column;gap:14px}
.puzzle-top{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.puzzle-label{font:700 11px/1 var(--mono);letter-spacing:.14em;color:#fff}
.puzzle-score{font:800 20px/1 'Archivo',sans-serif;letter-spacing:-.01em;color:#fff}
.puzzle-board{display:grid;grid-template-columns:repeat(5,1fr);border:2px solid #ffffff;background:color-mix(in srgb,#000000 18%,transparent)}
.puzzle-board button{border:1px solid color-mix(in srgb,#ffffff 34%,transparent);background:transparent;padding:0;aspect-ratio:1;cursor:pointer;transition:background 160ms ease-out}
.puzzle-board button.on{background:#ffffff}
.puzzle-board.cleared button{cursor:default}
.puzzle-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start;justify-content:space-between}
.puzzle-hint{font:11px/1.7 var(--mono);color:color-mix(in srgb,#fff 85%,transparent);max-width:36ch}
.ghostbtn{flex:none;font:700 11px/1 'Archivo',sans-serif;letter-spacing:.06em;background:transparent;color:#fff;border:2px solid color-mix(in srgb,#fff 55%,transparent);padding:9px 12px;cursor:pointer}

/* home: skill builder */
.builder{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(215px,100%),1fr));gap:2px;background:var(--color-divider);border:2px solid var(--color-divider)}
.builder-col{background:var(--color-bg)}
.builder-head{padding:14px 16px;border-bottom:2px solid var(--color-divider)}
.builder-col button{display:block;width:100%;text-align:left;border:0;border-bottom:1px solid var(--color-divider);font:600 14px/1.4 var(--sans);padding:13px 16px;cursor:pointer;background:transparent;color:#fff}
.builder-col button[aria-pressed="true"]{background:#fff;color:var(--color-accent)}
.console{margin-top:2px;border:2px solid var(--color-divider);background:var(--color-accent)}
.console-bar{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:2px solid color-mix(in srgb,#fff 45%,transparent)}
.console-name{font:700 14px/1.4 var(--sans);color:#fff}
.console-actions{display:flex;gap:12px;align-items:center}
.console-coins{font:700 11px/1 var(--mono);letter-spacing:.12em;color:#fff}
.runbtn{font:700 13px/1 'Archivo',sans-serif;background:#fff;color:var(--color-accent);border:0;padding:11px 18px;cursor:pointer}
.runbtn:disabled{opacity:.45;cursor:not-allowed}
.console-out{padding:18px;min-height:152px;font:12.5px/1.95 var(--mono);color:#fff}

@media(max-width:640px){.wrap{padding:0 18px}.sec{padding-block:44px}.sec-first{padding-block:48px 44px}.poster{padding:60px 0}}