@charset "utf-8";
/* ============================================================================
   琅珠工房(ROJU)HPモック 第17号 — 2026-09-07
   design-system/017-roju-atelier/MASTER.md の配色・余白・部品仕様に沿う。
   ただし書体だけは端末標準に置き換えている(外部フォント禁止・_方針.md §2)。
   ========================================================================== */

:root{
  /* 色。MASTER.md の Premium black + gold accent をそのまま使う */
  --sumi:#1C1917;      /* 主色(文字・罫の濃いほう) */
  --sumi2:#44403C;     /* 副 */
  --moji:#0C0A09;      /* 本文の黒 */
  --usu:#6B635C;       /* 弱い文字 */
  --usu2:#8C837B;      /* さらに弱い */
  --kin:#A16207;       /* 差し色。罫・釦・強調だけに使う(§9-3 主色は1色) */
  --kin-usu:#C89B4A;
  --ji:#FAFAF9;        /* 地 */
  --kami:#FFFFFF;
  --keisen:#D6D3D1;
  --keisen-usu:#E7E4E1;

  --mincho:"游明朝","Yu Mincho",YuMincho,"Hiragino Mincho ProN","HGS明朝E","MS PMincho",serif;
  --gothic:"游ゴシック体","Yu Gothic",YuGothic,"Hiragino Sans","Hiragino Kaku Gothic ProN",Meiryo,system-ui,sans-serif;

  --pad:clamp(20px,5vw,52px);
  --dan:clamp(56px,9vw,132px);   /* 段の上下(§9-3 余白は広く) */
  --w:1180px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--ji);color:var(--moji);
  font-family:var(--gothic);
  font-size:15px;line-height:2.0;letter-spacing:.045em;
  overflow-x:hidden;
}
img,svg,canvas{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--mincho);font-weight:500;line-height:1.55;letter-spacing:.09em}
ul{list-style:none}

.wrap{max-width:var(--w);margin-inline:auto;padding-inline:var(--pad);width:100%}
.dan{padding-block:var(--dan)}
.hr{height:1px;background:var(--keisen-usu);border:0}

/* 節の見出し(通し番号 + 明朝) */
.midashi{margin-bottom:clamp(26px,4vw,52px)}
.midashi .no{
  display:block;font-size:.62rem;letter-spacing:.34em;color:var(--kin);
  margin-bottom:1.4em;font-variant-numeric:tabular-nums;
}
.midashi h2{font-size:clamp(1.32rem,3.2vw,2.05rem);margin-bottom:.7em}
.midashi p{font-size:.86rem;color:var(--usu);max-width:44em}

/* ---------------------------------------------------------------- 見出し帯 */
.head{
  position:sticky;top:0;z-index:60;
  background:rgba(250,250,249,.93);
  backdrop-filter:saturate(1.2) blur(8px);
  border-bottom:1px solid var(--keisen-usu);
}
.head .in{
  max-width:var(--w);margin-inline:auto;padding:12px var(--pad);
  display:flex;flex-wrap:wrap;gap:8px 22px;align-items:center;
}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand svg{width:26px;height:26px;flex:none}
.brand b{font-family:var(--mincho);font-size:1.02rem;letter-spacing:.24em;font-weight:500}
.brand small{font-size:.54rem;letter-spacing:.3em;color:var(--usu2);display:block;margin-top:2px}
/* 折りたたみメニューにはしない。閉じている中のリンクは押せないため(§4-1 の3)。
   375px では2段に折り返して、全部のリンクが最初から押せる状態にしておく。 */
.nav{display:flex;flex-wrap:wrap;gap:2px 18px;margin-left:auto}
.nav a{
  font-size:.72rem;letter-spacing:.18em;color:var(--sumi2);
  padding:6px 0;border-bottom:1px solid transparent;transition:color .2s,border-color .2s;
}
.nav a:hover{color:var(--kin)}
.nav a[aria-current="page"]{color:var(--kin);border-bottom-color:var(--kin)}

/* ---------------------------------------------------------------- 釦 */
.btn{
  display:inline-block;font-family:var(--gothic);font-size:.76rem;letter-spacing:.2em;
  padding:13px 30px;border-radius:2px;cursor:pointer;transition:all .2s ease;border:1px solid transparent;
}
.btn-main{background:var(--kin);color:#fff}
.btn-main:hover{opacity:.9;transform:translateY(-1px)}
.btn-sub{background:transparent;color:var(--sumi);border-color:var(--sumi)}
.btn-sub:hover{background:var(--sumi);color:var(--ji)}
.btn[disabled]{opacity:.35;cursor:not-allowed;transform:none}
:where(a,button,summary,input,select):focus-visible{outline:2px solid var(--kin);outline-offset:3px}

/* ---------------------------------------------------------------- 現れ方 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .8s ease,transform .8s ease}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------------------------------------------------------------- 写真連番 */
.seq-stage{position:relative}
.seq-sticky{
  position:sticky;top:0;height:100svh;min-height:560px;
  display:grid;align-content:center;overflow:hidden;
}
.seq-layout{
  display:grid;gap:clamp(10px,2vw,44px);align-items:center;
  grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);
  max-width:var(--w);width:100%;margin-inline:auto;padding-inline:var(--pad);
}
@media(max-width:900px){.seq-layout{grid-template-columns:1fr;gap:8px}}

.seq{
  position:relative;width:100%;aspect-ratio:1/1;
  max-height:min(66svh,600px);margin-inline:auto;
  background:#EFEDEA;border:1px solid var(--keisen);overflow:hidden;border-radius:2px;
}
.seq canvas,.seq .seq-poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.seq canvas{opacity:0;transition:opacity .5s ease}
.seq.is-ready canvas{opacity:1}
.seq-corner{
  position:absolute;left:13px;bottom:11px;z-index:3;
  font-size:.58rem;letter-spacing:.24em;color:var(--usu2);pointer-events:none;
}
.seq-angle{
  position:absolute;right:13px;bottom:11px;z-index:3;font-family:var(--mincho);
  font-size:.66rem;letter-spacing:.2em;color:var(--kin);pointer-events:none;
  font-variant-numeric:tabular-nums;
}
.seq-load{
  position:absolute;inset:0;z-index:4;display:grid;place-content:center;gap:13px;
  background:linear-gradient(180deg,rgba(250,250,249,.72),rgba(250,250,249,.92));
  transition:opacity .5s ease,visibility .5s;text-align:center;pointer-events:none;
}
.seq.is-ready .seq-load{opacity:0;visibility:hidden}
.seq-load b{display:block;font-family:var(--mincho);font-size:.7rem;letter-spacing:.3em;color:var(--kin);font-weight:500}
.seq-load .bar{width:min(46vw,190px);height:2px;background:var(--keisen);overflow:hidden;margin-inline:auto}
.seq-load .bar i{display:block;height:100%;width:0;background:var(--kin);transition:width .25s linear}
.seq-load small{font-size:.6rem;letter-spacing:.2em;color:var(--usu2);font-variant-numeric:tabular-nums}
.seq-motion{
  position:absolute;left:0;right:0;bottom:0;z-index:5;
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  padding:11px 14px;background:rgba(255,255,255,.94);border-top:1px solid var(--keisen);
}
.seq-motion span{font-size:.64rem;letter-spacing:.06em;color:var(--usu);line-height:1.7;flex:1 1 180px}
.seq-motion button{
  flex:none;font-family:inherit;font-size:.66rem;letter-spacing:.16em;cursor:pointer;
  background:none;border:1px solid var(--kin);color:var(--kin);padding:8px 16px;border-radius:2px;
}
.seq-motion button:hover{background:var(--kin);color:#fff}
.seq--drag{cursor:grab;touch-action:pan-y}
.seq--drag:active{cursor:grabbing}
.seq-dragtip{
  position:absolute;left:50%;top:12px;transform:translateX(-50%);z-index:3;
  font-size:.6rem;letter-spacing:.22em;color:var(--usu);
  background:rgba(255,255,255,.82);padding:5px 13px;border:1px solid var(--keisen);
  transition:opacity .4s;pointer-events:none;
}
.seq--drag.is-touched .seq-dragtip{opacity:0}

.seq-copy{position:relative;min-height:1px}
.seq-hero{margin-bottom:clamp(16px,3vw,32px)}
.seq-hero h1{font-size:clamp(1.6rem,4.4vw,2.9rem);line-height:1.5;margin-bottom:.55em}
.seq-hero p{font-size:.66rem;letter-spacing:.34em;color:var(--kin);margin:0}
.seq-caps{position:relative;min-height:clamp(160px,20vw,182px)}
.seq-cap{position:absolute;inset:0;opacity:0;transform:translateY(14px);transition:opacity .55s,transform .55s;pointer-events:none}
.seq-cap.is-on{opacity:1;transform:none}
.seq-cap .no{display:block;font-size:.6rem;letter-spacing:.32em;color:var(--kin);margin-bottom:1em}
.seq-cap h2{font-size:clamp(1.02rem,2.4vw,1.4rem);margin-bottom:.7em}
.seq-cap p{font-size:.82rem;color:var(--usu);margin:0}
@media(max-width:900px){
  .seq-caps{min-height:216px}
  .seq{max-height:44svh}
  .seq-hero h1{font-size:clamp(1.35rem,6.6vw,2rem)}
}
.seq-progress{margin-top:24px;height:1px;background:var(--keisen);position:relative}
.seq-progress i{position:absolute;inset:0 auto 0 0;width:0;background:var(--kin);transition:width .12s linear}

/* ---------------------------------------------------------------- 商品 */
.shina{display:grid;gap:clamp(28px,4vw,54px);grid-template-columns:repeat(auto-fit,minmax(268px,1fr))}
.shina-card{
  display:flex;flex-direction:column;background:var(--kami);
  border:1px solid var(--keisen-usu);border-radius:2px;overflow:hidden;
  transition:border-color .25s ease,transform .25s ease;
}
.shina-card:hover{border-color:var(--kin);transform:translateY(-2px)}
.shina-card .shot{aspect-ratio:14/9;background:#F1EFEC;overflow:hidden}
.shina-card .shot img{width:100%;height:100%;object-fit:cover}
.shina-card .meta{padding:22px clamp(18px,2.2vw,26px) 26px;display:flex;flex-direction:column;gap:.85em;flex:1}
.shina-card .ref{font-size:.6rem;letter-spacing:.26em;color:var(--usu2)}
.shina-card h3{font-size:1.1rem}
.shina-card p{font-size:.8rem;color:var(--usu);flex:1}
.shina-card .nedan{font-family:var(--mincho);font-size:.94rem;letter-spacing:.08em;color:var(--kin)}
.shina-card .go{font-size:.68rem;letter-spacing:.2em;color:var(--sumi);border-top:1px solid var(--keisen-usu);padding-top:1.1em}

/* 商品1件ごとの節(指輪.html) */
.hin{display:grid;gap:clamp(22px,4vw,56px);grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center}
.hin:nth-child(even) .hin-shot{order:2}
@media(max-width:820px){.hin{grid-template-columns:1fr}.hin:nth-child(even) .hin-shot{order:0}}
.hin-shot{border:1px solid var(--keisen-usu);background:#F1EFEC;border-radius:2px;overflow:hidden}
.hin-shot img{width:100%;height:auto}
.hin h3{font-size:clamp(1.24rem,3vw,1.75rem);margin-bottom:.6em}
.hin .ref{display:block;font-size:.6rem;letter-spacing:.3em;color:var(--kin);margin-bottom:1.4em}
.hin p{font-size:.86rem;color:var(--usu);margin-bottom:1.6em}

/* 仕様表。横に溢れさせない(箱の中でだけ横に滑らせる) */
.hyo-box{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--keisen-usu);border-radius:2px;background:var(--kami)}
table{border-collapse:collapse;width:100%;min-width:340px;font-size:.78rem}
th,td{padding:11px 15px;border-bottom:1px solid var(--keisen-usu);text-align:left;vertical-align:top}
th{font-weight:500;color:var(--usu);white-space:nowrap;width:9em;background:#F6F4F2}
tr:last-child th,tr:last-child td{border-bottom:0}
td b{font-weight:600;color:var(--sumi)}

/* ---------------------------------------------------------------- 工程 */
.kotei{display:grid;gap:1px;background:var(--keisen-usu);border:1px solid var(--keisen-usu);border-radius:2px;overflow:hidden}
.kotei > li{background:var(--kami);padding:clamp(22px,3vw,34px)}
.kotei .no{display:block;font-family:var(--mincho);font-size:.72rem;letter-spacing:.3em;color:var(--kin);margin-bottom:1.2em}
.kotei h3{font-size:1.06rem;margin-bottom:.7em}
.kotei p{font-size:.82rem;color:var(--usu)}
@media(min-width:760px){.kotei{grid-template-columns:repeat(2,1fr)}}

.zu{border:1px solid var(--keisen-usu);background:var(--kami);border-radius:2px;padding:clamp(16px,2.4vw,26px)}
.zu svg{width:100%;height:auto}
.zu figcaption{font-size:.72rem;color:var(--usu2);margin-top:1.2em;letter-spacing:.06em}

/* ---------------------------------------------------------------- 来店予約 */
.yoyaku{display:grid;gap:clamp(26px,4vw,48px);grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);align-items:start}
@media(max-width:880px){.yoyaku{grid-template-columns:1fr}}
.step{margin-bottom:clamp(26px,3.4vw,40px)}
.step > h3{font-size:.96rem;margin-bottom:1.2em;display:flex;align-items:center;gap:.9em}
.step > h3 i{
  font-style:normal;font-family:var(--mincho);font-size:.66rem;letter-spacing:.14em;color:var(--kin);
  border:1px solid var(--kin);border-radius:99px;padding:3px 11px;flex:none;
}
.fuda{display:flex;flex-wrap:wrap;gap:10px}
.fuda button{
  font-family:var(--gothic);font-size:.76rem;letter-spacing:.1em;cursor:pointer;
  background:var(--kami);border:1px solid var(--keisen);color:var(--sumi);
  padding:11px 18px;border-radius:2px;transition:all .2s ease;line-height:1.6;text-align:left;
}
.fuda button:hover:not([disabled]){border-color:var(--kin);color:var(--kin)}
.fuda button[aria-pressed="true"]{background:var(--sumi);border-color:var(--sumi);color:var(--ji)}
.fuda button[disabled]{opacity:.38;cursor:not-allowed;text-decoration:line-through}
.fuda button small{display:block;font-size:.62rem;letter-spacing:.06em;color:var(--usu2);margin-top:3px}
.fuda button[aria-pressed="true"] small{color:rgba(250,250,249,.72)}

.hikae{border:1px solid var(--keisen);background:var(--kami);border-radius:2px;padding:clamp(20px,2.6vw,28px);position:sticky;top:96px}
.hikae h3{font-size:.92rem;margin-bottom:1.4em;padding-bottom:1em;border-bottom:1px solid var(--keisen-usu)}
.hikae dl{display:grid;grid-template-columns:5.5em 1fr;gap:.85em 1em;font-size:.79rem;margin-bottom:1.6em}
.hikae dt{color:var(--usu2)}
.hikae dd{color:var(--sumi)}
.hikae .kotae{
  border-top:1px solid var(--keisen-usu);padding-top:1.4em;margin-top:.4em;
  font-size:.8rem;line-height:1.95;color:var(--sumi);
}
.hikae .kotae b{display:block;font-family:var(--mincho);font-size:1.02rem;color:var(--kin);margin-bottom:.6em;letter-spacing:.06em}
.chui{font-size:.7rem;color:var(--usu2);line-height:1.85;margin-top:1.4em}

/* ---------------------------------------------------------------- 沿革・その他 */
.enkaku{border-top:1px solid var(--keisen-usu)}
.enkaku li{display:grid;grid-template-columns:6.5em 1fr;gap:1.2em;padding:16px 0;border-bottom:1px solid var(--keisen-usu);font-size:.82rem}
.enkaku .toshi{font-family:var(--mincho);color:var(--kin);letter-spacing:.1em}
@media(max-width:520px){.enkaku li{grid-template-columns:1fr;gap:.3em}}

.hako{display:grid;gap:clamp(20px,3vw,34px);grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.hako > div{background:var(--kami);border:1px solid var(--keisen-usu);border-radius:2px;padding:clamp(20px,2.6vw,30px)}
.hako h3{font-size:1rem;margin-bottom:.9em}
.hako p{font-size:.81rem;color:var(--usu)}

.hikari{background:var(--sumi);color:var(--ji)}
.hikari h2,.hikari h3{color:var(--ji)}
.hikari p{color:#C9C3BC}
.hikari .no{color:var(--kin-usu)}

.q{border-bottom:1px solid var(--keisen-usu)}
.q summary{cursor:pointer;padding:18px 0;font-size:.86rem;list-style:none;display:flex;gap:1em;align-items:flex-start}
.q summary::-webkit-details-marker{display:none}
.q summary::before{content:"問";font-family:var(--mincho);font-size:.66rem;color:var(--kin);border:1px solid var(--kin);border-radius:99px;padding:2px 8px;flex:none;margin-top:.25em}
.q p{padding:0 0 20px 3.1em;font-size:.81rem;color:var(--usu)}

/* ---------------------------------------------------------------- 足 */
.foot{border-top:1px solid var(--keisen);background:#F4F2F0;margin-top:var(--dan)}
.foot .in{max-width:var(--w);margin-inline:auto;padding:clamp(38px,5vw,64px) var(--pad)}
.foot-nav{display:flex;flex-wrap:wrap;gap:10px 26px;margin-bottom:2.4em}
.foot-nav a{font-size:.74rem;letter-spacing:.16em;color:var(--sumi2)}
.foot-nav a:hover{color:var(--kin)}
.kakuu{
  border:1px solid var(--kin);border-radius:2px;padding:16px 18px;
  font-size:.72rem;line-height:1.9;color:var(--sumi2);background:#FBF7F0;
}
.kakuu b{color:var(--kin);font-weight:600}
.foot small{display:block;margin-top:2em;font-size:.66rem;letter-spacing:.14em;color:var(--usu2)}