/* ── seaside grass / 施工実績ページ 共通スタイル ── */
:root{
  --gold:#9a8560;
  --gold-ink:#7a6644;
  --gold-sub:rgba(154,133,96,.45);
  --dark:#0d1015;
  --darker:#090c0f;
  --darkest:#060809;
  --topbar:#1a1610;
  --warm:#f2ede4;
  --warm-mid:#ede8dd;
  --warm-border:#d8d2c4;
  --dark-text:#1a1814;
  --max:1200px;
  --font-display:'Oswald','Helvetica Neue',sans-serif;
  --font-serif-ja:'Noto Serif JP',serif;
  --font-ui:'Montserrat',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-ui);font-weight:300;background:var(--darker);color:#fff;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ── ヘッダ ── */
.topbar{height:28px;background:var(--topbar);display:flex;align-items:center;justify-content:space-between;padding:0 36px}
.topbar span{font-size:8px;letter-spacing:.24em;color:rgba(255,255,255,.6);text-transform:uppercase}
.nav{height:60px;background:var(--warm);display:flex;align-items:center;justify-content:space-between;padding:0 36px;position:sticky;top:0;z-index:99;border-bottom:.5px solid var(--warm-border)}
.nav-logo-main{font-family:var(--font-display);font-size:15px;letter-spacing:.2em;color:var(--dark-text);text-transform:uppercase;font-weight:400;line-height:1}
.nav-logo-sub{font-size:8px;letter-spacing:.2em;color:var(--gold-ink);text-transform:uppercase;margin-top:2px}
.nav-back{font-family:var(--font-display);font-size:9px;letter-spacing:.18em;color:#fff;background:var(--dark-text);padding:10px 20px;text-transform:uppercase}

/* ── パンくず ── */
.crumb{background:var(--darkest);padding:14px 36px;border-bottom:.5px solid rgba(154,133,96,.12)}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:10px;max-width:var(--max);margin:0 auto;font-size:10px;letter-spacing:.1em;color:rgba(255,255,255,.7)}
.crumb a{color:var(--gold)}
.crumb li+li::before{content:"／";margin-right:10px;color:rgba(255,255,255,.2)}

/* ── ページヘッド ── */
.phead{background:var(--dark);padding:72px 36px 56px;border-bottom:.5px solid rgba(154,133,96,.12)}
.phead-in{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:end}
.eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.eyebrow i{width:22px;height:.5px;background:var(--gold);display:block}
.eyebrow span{font-family:var(--font-display);font-size:9px;letter-spacing:.22em;color:var(--gold);text-transform:uppercase}
h1{font-family:var(--font-serif-ja);font-weight:300;font-size:clamp(23px,2.9vw,35px);line-height:1.5;letter-spacing:.04em;text-wrap:balance}
h1 .brand{display:block;font-family:var(--font-display);font-weight:300;font-size:clamp(13px,1.5vw,16px);letter-spacing:.2em;color:var(--gold);margin-bottom:12px;text-transform:uppercase}
.phead p{font-size:14px;line-height:2.1;color:rgba(255,255,255,.72);margin-top:24px;max-width:56ch;letter-spacing:.02em}
.phead p strong{color:#fff;font-weight:400}
.phead-side{border:.5px solid rgba(154,133,96,.25);background:rgba(0,0,0,.3);padding:26px 28px}
.phead-side h2{font-family:var(--font-display);font-size:9px;letter-spacing:.26em;color:var(--gold);text-transform:uppercase;font-weight:300;margin-bottom:16px}
.phead-side dl{display:grid;grid-template-columns:auto 1fr;gap:9px 18px;font-size:12.5px;line-height:1.8}
.phead-side dt{color:rgba(255,255,255,.6);letter-spacing:.06em;white-space:nowrap}
.phead-side dd{color:rgba(255,255,255,.7)}

/* ── ギャラリー ── */
.gallery{background:var(--darker);padding:64px 36px}
.gallery-in{max-width:var(--max);margin:0 auto}
.gtitle{display:flex;align-items:baseline;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:28px}
.gtitle h2{font-family:var(--font-serif-ja);font-weight:300;font-size:20px;letter-spacing:.06em}
.gtitle span{font-family:var(--font-display);font-size:10px;letter-spacing:.2em;color:rgba(255,255,255,.55);text-transform:uppercase}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
figure{margin:0;position:relative;background:#000;border:.5px solid rgba(154,133,96,.14);transition:border-color .3s,transform .3s}
figure:hover{border-color:rgba(154,133,96,.85);transform:translateY(-2px)}
figure button{display:block;width:100%;padding:0;border:none;background:none;cursor:zoom-in}
figure img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}
figcaption{font-size:11px;line-height:1.8;color:rgba(255,255,255,.72);padding:11px 13px 13px;letter-spacing:.03em}
.gnum{position:absolute;top:10px;left:10px;font-family:var(--font-display);font-size:9px;letter-spacing:.16em;color:rgba(255,255,255,.6);background:rgba(0,0,0,.55);padding:3px 8px;z-index:2}
.tag{position:absolute;top:10px;right:10px;font-family:var(--font-display);font-size:9px;letter-spacing:.2em;padding:3px 9px;z-index:2}
.tag.before{background:rgba(0,0,0,.7);color:rgba(255,255,255,.55);border:.5px solid rgba(255,255,255,.16)}
.tag.after{background:rgba(154,133,96,.92);color:#000}

/* ── 仕様 ── */
.spec{background:var(--dark);padding:64px 36px;border-top:.5px solid rgba(154,133,96,.12)}
.spec-in{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.spec h2{font-family:var(--font-serif-ja);font-weight:300;font-size:22px;letter-spacing:.06em;margin-bottom:22px}
.spec ul{list-style:none;display:grid;gap:11px}
.spec li{font-size:13px;line-height:1.95;color:rgba(255,255,255,.45);padding-left:18px;position:relative;letter-spacing:.02em}
.spec li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:.5px;background:var(--gold)}
.spec strong{color:#fff;font-weight:400}
.note{border:.5px solid rgba(154,133,96,.28);border-left:2px solid var(--gold);background:rgba(0,0,0,.28);padding:26px 28px}
.note h3{font-family:var(--font-display);font-size:9px;letter-spacing:.26em;color:var(--gold);text-transform:uppercase;font-weight:300;margin-bottom:15px}
.note ul{display:grid;gap:11px}
.note li{font-size:12.5px;line-height:1.95;color:rgba(255,255,255,.72);padding-left:18px;position:relative}
.note li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:.5px;background:var(--gold)}
.note strong{color:#fff;font-weight:400}

/* ── CTA ── */
.cta{background:linear-gradient(180deg,var(--darker) 0%,var(--darkest) 100%);padding:84px 36px;text-align:center}
.cta h2{font-family:var(--font-serif-ja);font-weight:300;font-size:clamp(20px,2.6vw,28px);line-height:1.6;letter-spacing:.05em}
.cta p{font-size:13.5px;line-height:2;color:rgba(255,255,255,.6);margin:18px auto 0;max-width:50ch}
.tel{font-family:var(--font-display);font-weight:300;font-size:clamp(30px,5vw,52px);letter-spacing:.06em;color:var(--gold);margin-top:26px;display:block}
.btns{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:30px}
.btn{font-family:var(--font-display);font-size:12px;letter-spacing:.2em;padding:16px 30px;display:inline-flex;align-items:center;gap:10px;font-weight:300;transition:all .3s}
.btn-primary{background:var(--gold);color:#000;border:1px solid var(--gold)}
.btn-primary:hover{background:#b09870;transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.2);color:#fff}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.line-row{margin-top:28px;padding-top:26px;border-top:.5px solid rgba(154,133,96,.18);display:flex;flex-direction:column;align-items:center;gap:12px}
.line-row .lbl{font-size:11px;letter-spacing:.2em;color:rgba(255,255,255,.7)}
.line-row img{width:116px;height:36px}

/* ── 他の実績 ── */
.more{background:var(--darkest);padding:56px 36px;border-top:.5px solid rgba(154,133,96,.12)}
.more-in{max-width:var(--max);margin:0 auto}
.more h2{font-family:var(--font-display);font-size:10px;letter-spacing:.26em;color:var(--gold);text-transform:uppercase;margin-bottom:22px}
.more-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.more-card{border:.5px solid rgba(154,133,96,.18);background:rgba(255,255,255,.02);padding:18px 20px;transition:all .3s}
.more-card:hover{border-color:var(--gold);background:rgba(154,133,96,.06);transform:translateY(-2px)}
.more-card .b{font-family:var(--font-display);font-size:8px;letter-spacing:.24em;color:rgba(154,133,96,.9);text-transform:uppercase}
.more-card .n{font-family:var(--font-display);font-size:16px;letter-spacing:.05em;color:#fff;margin:5px 0 3px}
.more-card .d{font-size:11px;color:rgba(255,255,255,.6);line-height:1.7}
.more-card[aria-current="page"]{border-color:var(--gold);background:rgba(154,133,96,.09)}

footer{background:var(--darkest);padding:34px 36px;border-top:.5px solid rgba(154,133,96,.12);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;max-width:none}
footer span,footer a{font-size:10px;letter-spacing:.16em;color:rgba(255,255,255,.55)}
footer a:hover{color:var(--gold)}

/* ── ライトボックス ── */
.lb{position:fixed;inset:0;background:rgba(4,6,8,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:32px}
.lb[open],.lb.on{display:flex}
.lb img{max-width:min(1300px,94vw);max-height:86vh;width:auto;object-fit:contain}
.lb-cap{position:absolute;bottom:26px;left:0;right:0;text-align:center;font-size:12px;letter-spacing:.06em;color:rgba(255,255,255,.55);padding:0 24px}
.lb-close,.lb-prev,.lb-next{position:absolute;background:rgba(0,0,0,.5);border:.5px solid rgba(255,255,255,.2);color:#fff;font-size:20px;line-height:1;width:44px;height:44px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{border-color:var(--gold);color:var(--gold)}
.lb-close{top:22px;right:22px}
.lb-prev{left:22px;top:50%;transform:translateY(-50%)}
.lb-next{right:22px;top:50%;transform:translateY(-50%)}

@media(max-width:1000px){
  .phead-in,.spec-in{grid-template-columns:1fr;gap:36px}
  .grid{grid-template-columns:repeat(2,1fr)}
  .more-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .topbar,.nav,.crumb{padding-left:18px;padding-right:18px}
  .topbar span:nth-child(2){display:none}
  .phead,.gallery,.spec,.cta,.more,footer{padding-left:18px;padding-right:18px}
  .phead{padding-top:48px}
  .grid{grid-template-columns:1fr}
  .lb-prev,.lb-next{width:38px;height:38px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}