/* 結土左官（架空）… 紹介データの見た目。壁そのものは kabe.js が描く。ここは壁の前に置く小さな札と、壁が描けないときの読み物 */
:root{--ink:#191715;--paper:#efe9df;--mute:#a49b8e;--line:#00853a;--bengara:#8a3a22;--f:"Noto Sans JP",system-ui,sans-serif}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--f);color:var(--ink);background:var(--paper);line-height:1.9;letter-spacing:.03em;overflow-x:clip}
a{color:inherit}
h1,h2,h3,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
#kabe{position:fixed;inset:0;width:100%;height:100%;display:block;z-index:0;pointer-events:none}

/* 壁が描けないとき（JS・WebGL なし）は、ふつうに読める */
html:not(.gl) #kabe{display:none}
html:not(.gl) main{max-width:760px;margin:0 auto;padding:120px 20px 160px}
html:not(.gl) .men{padding:56px 0;border-top:1px solid rgba(0,0,0,.15)}
html:not(.gl) .men h1{font-size:40px;font-weight:800;line-height:1.3}
html:not(.gl) .men h2{font-size:28px;font-weight:800;line-height:1.4;margin-bottom:16px}
html:not(.gl) .men h3{font-size:18px;font-weight:700}
html:not(.gl) .men li,html:not(.gl) .men article,html:not(.gl) .men figure{margin:10px 0}
html:not(.gl) .michi,html:not(.gl) .hint{display:none}

/* 壁があるとき：節は「歩く距離」になり、中身は読み上げ用に残す */
.gl body{background:#0d0c0b}
.gl main{position:relative;z-index:1}
.gl .men{height:100vh;height:100svh;position:relative;scroll-snap-align:start}
.gl .men > *{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
.gl{scroll-snap-type:y proximity}
.gl body{cursor:crosshair}
.gl.kote-chu body{cursor:grabbing;user-select:none}

/* 表札（左上） */
.hyosatsu{position:fixed;top:16px;left:16px;z-index:10;display:flex;align-items:stretch;gap:2px;font-size:12px}
.hyosatsu > *{background:rgba(16,15,13,.78);color:var(--paper);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.hyosatsu .na{display:flex;flex-direction:column;justify-content:center;padding:10px 16px;text-decoration:none;line-height:1.35}
.hyosatsu b{font-size:17px;font-weight:700;letter-spacing:.34em}
.hyosatsu small{font-size:10px;letter-spacing:.08em;color:var(--mute)}
.hyosatsu nav{display:flex}
.hyosatsu nav a{display:flex;align-items:center;padding:0 16px;text-decoration:none;letter-spacing:.16em;border-left:1px solid rgba(239,233,223,.12)}
.hyosatsu nav a:hover,.hyosatsu nav a[aria-current]{background:rgba(239,233,223,.12)}

/* 入口（右下）。最後の面では大きく前に出る */
.iri{position:fixed;right:16px;bottom:16px;z-index:10;display:flex;gap:2px;transition:transform .7s cubic-bezier(.2,.7,.2,1),right .7s,bottom .7s}
.iri a{display:flex;flex-direction:column;justify-content:center;min-height:56px;padding:9px 18px;text-decoration:none;color:#fff;line-height:1.35;transition:filter .2s}
.iri a:hover{filter:brightness(1.15)}
.iri b{font-size:14px;font-weight:700;letter-spacing:.1em}
.iri small{font-size:10.5px;letter-spacing:.04em;opacity:.85}
.i-tel{background:rgba(16,15,13,.82);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.i-line{background:var(--line)}
.i-mitsu{background:var(--bengara)}
.gl.owari .iri{right:8vw;bottom:22vh;transform:scale(1.35);transform-origin:right bottom}

/* 道しるべ（左下）：9つの塗り */
.michi{position:fixed;left:14px;top:50%;transform:translateY(-50%);z-index:10;display:flex;flex-direction:column;gap:6px;align-items:flex-start;padding:7px;background:rgba(16,15,13,.6);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.michi button{width:22px;height:22px;padding:0;border:0;background:var(--c) center/cover;cursor:pointer;opacity:.55;transition:height .4s,width .4s,opacity .3s,box-shadow .3s}
.michi button[aria-current="true"]{width:36px;opacity:1;box-shadow:0 0 0 1px var(--paper)}
.michi button:hover{opacity:1}

/* 断り書き（右上） */
.kotowari{position:fixed;top:20px;right:20px;z-index:10;max-width:22em;font-size:10px;letter-spacing:.06em;line-height:1.6;color:rgba(239,233,223,.7);text-align:right;text-shadow:0 1px 2px rgba(0,0,0,.6)}
html:not(.gl) .kotowari{position:static;color:var(--mute);text-shadow:none;margin:0 auto 120px;max-width:760px;padding:0 20px;text-align:left}

/* 見本帳・相談のページの読み物（壁の前に置く板） */
.ita{position:relative;z-index:2;max-width:640px;margin:0 auto;padding:0 16px 140px}
.ita-in{background:rgba(239,233,223,.94);padding:clamp(24px,5vw,48px);box-shadow:0 30px 80px -30px rgba(0,0,0,.8)}
.ita h2{font-size:22px;font-weight:800;letter-spacing:.06em;margin-bottom:6px}
.ita .sub{font-size:13px;color:#6c655c;margin-bottom:28px}
.michi3{display:grid;gap:2px;margin-bottom:36px}
.michi3 a{display:block;text-decoration:none;color:#fff;padding:16px 18px;line-height:1.5}
.michi3 b{display:block;font-size:17px;letter-spacing:.08em}
.michi3 span{font-size:12.5px;opacity:.9}
.form{display:grid;gap:26px}
.form fieldset{border:0;padding:0;margin:0;min-width:0}
.form legend,.form .lb{display:block;font-size:13px;font-weight:700;letter-spacing:.1em;margin-bottom:8px}
.form label{display:block}
.hissu{font-size:10px;color:var(--bengara);margin-left:8px;letter-spacing:.1em}
.nini{font-size:10px;color:#857c70;margin-left:8px}
.form input:not([type=radio]),.form textarea{font:inherit;font-size:16px;width:100%;padding:10px 0;border:0;border-bottom:1px solid var(--ink);background:transparent;border-radius:0}
.form input[type=file]{border:0;font-size:13px}
.form input:focus,.form textarea:focus{outline:none;border-bottom:2px solid var(--bengara)}
.sentaku{display:flex;flex-wrap:wrap;gap:8px}
.sentaku label{display:flex;align-items:center;gap:8px;border:1px solid rgba(0,0,0,.2);padding:10px 14px;cursor:pointer;font-size:14px}
.sentaku label:has(input:checked){background:var(--ink);color:var(--paper);border-color:var(--ink)}
.sentaku input{margin:0;accent-color:var(--bengara)}
.okuru{font:inherit;font-weight:700;letter-spacing:.12em;color:#fff;background:var(--bengara);border:0;padding:16px 28px;cursor:pointer;justify-self:start}
.ita details{border-top:1px solid rgba(0,0,0,.15)}
.ita summary{cursor:pointer;padding:14px 0;font-weight:700;font-size:15px}
.ita details p{padding-bottom:14px;color:#5c554c;font-size:14px}
.gl[data-kabe="haikei"] .men{position:absolute;top:0;left:0;height:0}
.gl[data-kabe="haikei"] main{padding-top:max(44vh,300px)}
.gl[data-kabe="haikei"]{scroll-snap-type:none}

@media (max-width:640px){
  .hyosatsu{top:10px;left:10px;right:10px}
  .hyosatsu .na{flex:1;padding:8px 12px}
  .hyosatsu b{font-size:15px}
  .hyosatsu nav a{padding:0 12px}
  .kotowari{display:none}
  .iri{left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;padding-bottom:env(safe-area-inset-bottom);background:rgba(16,15,13,.9)}
  .iri a{min-height:58px;padding:8px 6px;align-items:center;text-align:center}
  .iri b{font-size:13px;letter-spacing:.04em}
  .iri small{display:none}
  .gl.owari .iri{right:0;bottom:0;transform:none}
  .gl.owari .iri a{min-height:76px}
  .michi{display:none}
  .michi button{width:12px;height:12px}
  .michi button[aria-current="true"]{height:12px;width:22px}
  .gl[data-kabe="haikei"] main{padding-top:38vh}
}