/* ============================================================
   建匠 民泊建築サイト  base stylesheet
   ============================================================ */
:root{
  --ink:#1B1B19;
  --ink-soft:#4A4640;
  --muted:#77716A;
  --bg:#FAF8F4;
  --bg-alt:#F1EDE5;
  --bg-deep:#1F2A24;
  --line:#DED7C9;
  --accent:#1F4D3D;
  --accent-hover:#2C6A54;
  --brass:#A98247;
  --white:#fff;
  --radius:2px;
  --maxw:1120px;
  --gut:clamp(20px,5vw,40px);
  --serif:"Noto Serif JP",'Hiragino Mincho ProN','Yu Mincho',serif;
  --sans:"Noto Sans JP",'Hiragino Sans','Yu Gothic',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.9;font-feature-settings:"palt";-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.45;margin:0}
p{margin:0 0 1.4em}
ul,ol{margin:0 0 1.4em;padding-left:1.4em}

/* layout */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gut)}
.wrap-narrow{max-width:800px;margin-inline:auto;padding-inline:var(--gut)}
.section{padding:clamp(56px,9vw,110px) 0}
.section--alt{background:var(--bg-alt)}
.section--deep{background:var(--bg-deep);color:#EDE9E1}
.section--deep h2,.section--deep h3{color:#fff}

/* section heading */
.sec-head{margin-bottom:clamp(32px,5vw,56px)}
.sec-head__en{display:block;font-family:var(--serif);font-size:.75rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--brass);margin-bottom:.9em}
.sec-head__ja{font-size:clamp(1.5rem,3.6vw,2.1rem);letter-spacing:.04em}
.sec-head__lead{margin-top:1.2em;color:var(--ink-soft);max-width:62ch}
.sec-head--center{text-align:center}
.sec-head--center .sec-head__lead{margin-inline:auto}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:1.05em 2.4em;font-size:.95rem;font-weight:700;letter-spacing:.08em;
  border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:var(--radius);
  transition:background .2s,color .2s,border-color .2s;cursor:pointer;text-align:center}
.btn:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.btn--ghost{background:transparent;color:var(--accent)}
.btn--ghost:hover{background:var(--accent);color:#fff}
.btn--light{background:#fff;color:var(--accent);border-color:#fff}
.btn--light:hover{background:var(--bg-alt);border-color:var(--bg-alt);color:var(--accent)}
.btn--lg{padding:1.25em 3em;font-size:1rem}
.btn--block{display:flex;width:100%}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(250,248,244,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header__inner{max-width:var(--maxw);margin-inline:auto;padding:0 var(--gut);
  display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}
.site-logo{font-family:var(--serif);font-size:1.05rem;letter-spacing:.06em;line-height:1.3;font-weight:600}
.site-logo small{display:block;font-family:var(--sans);font-size:.62rem;letter-spacing:.18em;color:var(--muted);font-weight:400}
.gnav{display:flex;align-items:center;gap:28px}
.gnav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0;font-size:.85rem;font-weight:500}
.gnav a{padding:6px 0;border-bottom:1px solid transparent;transition:border-color .2s,color .2s}
.gnav a:hover{border-color:var(--brass);color:var(--accent)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;
  border-radius:var(--radius);cursor:pointer;padding:0;position:relative}
.nav-toggle span{position:absolute;left:12px;width:20px;height:1.5px;background:var(--ink);transition:.25s}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle[aria-expanded="true"] span:nth-child(1){top:21px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){top:21px;transform:rotate(-45deg)}
@media(max-width:1000px){
  .nav-toggle{display:block}
  .gnav{position:fixed;inset:74px 0 auto;background:var(--bg);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gut) 28px;display:none}
  .gnav.is-open{display:flex}
  .gnav ul{flex-direction:column;gap:0}
  .gnav li{border-bottom:1px solid var(--line)}
  .gnav a{display:block;padding:16px 0;font-size:.95rem}
  .gnav .btn{margin-top:20px}
}

/* hero */
.hero{position:relative;min-height:clamp(480px,78vh,720px);display:flex;align-items:flex-end;
  color:#fff;overflow:hidden;background:var(--bg-deep)}
.hero__media{position:absolute;inset:0}
.hero__media img{width:100%;height:100%;object-fit:cover}
.hero__media::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(20,26,22,.35) 0%,rgba(20,26,22,.25) 40%,rgba(20,26,22,.82) 100%)}
.hero__inner{position:relative;width:100%;max-width:var(--maxw);margin-inline:auto;
  padding:0 var(--gut) clamp(48px,8vw,88px)}
.hero__eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.2em;padding:.5em 1.1em;
  border:1px solid rgba(255,255,255,.55);border-radius:99px;margin-bottom:1.6em}
.hero__title{font-size:clamp(2rem,6.4vw,3.6rem);letter-spacing:.03em;line-height:1.35;color:#fff;
  text-shadow:0 2px 24px rgba(0,0,0,.35)}
.hero__lead{margin-top:1.4em;max-width:52ch;font-size:clamp(.95rem,1.7vw,1.06rem);color:#EAE6DE}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:2.2em}

/* page hero */
.page-hero{background:var(--bg-deep);color:#fff;padding:clamp(56px,9vw,96px) 0 clamp(44px,7vw,72px);
  position:relative;overflow:hidden}
.page-hero__en{display:block;font-family:var(--serif);font-size:.72rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--brass);margin-bottom:1em}
.page-hero h1{font-size:clamp(1.7rem,4.4vw,2.6rem);color:#fff;letter-spacing:.04em}
.page-hero__lead{margin-top:1.2em;max-width:60ch;color:#D8D3CA}

/* breadcrumb */
.crumb{font-size:.76rem;color:var(--muted);padding:14px 0;border-bottom:1px solid var(--line)}
.crumb ol{display:flex;flex-wrap:wrap;gap:.5em;list-style:none;margin:0;padding:0}
.crumb li::after{content:"／";margin-left:.5em;color:var(--line)}
.crumb li:last-child::after{content:""}
.crumb a:hover{color:var(--accent)}

/* cards grid */
.grid{display:grid;gap:clamp(20px,3vw,32px)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media(max-width:860px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
a.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(31,45,38,.12)}
.card__media{aspect-ratio:4/3;background:var(--bg-alt);overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
a.card:hover .card__media img{transform:scale(1.04)}
.card__body{padding:22px 22px 26px;flex:1;display:flex;flex-direction:column}
.card__meta{font-size:.72rem;letter-spacing:.1em;color:var(--muted);margin-bottom:.7em}
.card__title{font-size:1.08rem;line-height:1.55;margin-bottom:.6em}
.card__text{font-size:.86rem;color:var(--ink-soft);margin:0}
.card__tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}

.tag{display:inline-block;font-size:.7rem;letter-spacing:.06em;padding:.35em .85em;
  border:1px solid var(--line);border-radius:99px;color:var(--ink-soft);background:var(--bg)}
.tag--law{border-color:var(--accent);color:var(--accent);background:rgba(31,77,61,.06);font-weight:700}

/* strength list */
.strength{display:grid;gap:clamp(24px,4vw,40px)}
.strength__item{display:grid;grid-template-columns:auto 1fr;gap:clamp(18px,3vw,32px);
  padding-bottom:clamp(24px,4vw,40px);border-bottom:1px solid var(--line)}
.strength__item:last-child{border-bottom:0;padding-bottom:0}
.strength__num{font-family:var(--serif);font-size:clamp(1.6rem,4vw,2.4rem);color:var(--brass);
  line-height:1;letter-spacing:.02em}
.strength__title{font-size:clamp(1.15rem,2.4vw,1.4rem);margin-bottom:.7em}
.strength__text{color:var(--ink-soft);margin:0}

/* flow steps */
.flow{list-style:none;margin:0;padding:0;counter-reset:step}
.flow__item{position:relative;padding:0 0 clamp(34px,5vw,52px) clamp(56px,8vw,86px)}
.flow__item::before{counter-increment:step;content:"0" counter(step);position:absolute;left:0;top:-4px;
  font-family:var(--serif);font-size:1.15rem;letter-spacing:.06em;color:#fff;background:var(--accent);
  width:clamp(40px,6vw,52px);height:clamp(40px,6vw,52px);display:grid;place-items:center;border-radius:50%}
.flow__item::after{content:"";position:absolute;left:calc(clamp(40px,6vw,52px)/2 - 1px);
  top:clamp(40px,6vw,52px);bottom:0;width:1px;background:var(--line)}
.flow__item:last-child{padding-bottom:0}
.flow__item:last-child::after{display:none}
.flow__title{font-size:1.2rem;margin-bottom:.6em}
.flow__text{color:var(--ink-soft);margin:0 0 1em}
.flow__who{display:inline-flex;align-items:center;gap:.5em;font-size:.74rem;font-weight:700;
  letter-spacing:.06em;padding:.4em 1em;border-radius:99px}
.flow__who--us{background:rgba(31,77,61,.1);color:var(--accent)}
.flow__who--you{background:rgba(169,130,71,.14);color:#7A5B2C}

/* spec table */
.spec{width:100%;border-collapse:collapse;font-size:.9rem}
.spec th,.spec td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:32%;font-weight:600;color:var(--ink-soft);background:var(--bg-alt);white-space:nowrap}
@media(max-width:600px){
  .spec th,.spec td{display:block;width:100%}
  .spec th{border-bottom:0;padding-bottom:4px}
}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:700px){.gallery{grid-template-columns:repeat(2,1fr)}}
.gallery a{display:block;aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.gallery a:hover img{transform:scale(1.05)}

/* notice box */
.notice{border:1px solid var(--line);border-left:3px solid var(--brass);background:#fff;
  padding:20px 24px;font-size:.84rem;color:var(--ink-soft);border-radius:var(--radius)}
.notice strong{color:var(--ink)}
.notice p:last-child{margin-bottom:0}

/* simulator */
.sim{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px);align-items:start}
@media(max-width:820px){.sim{grid-template-columns:1fr}}
.sim__panel{background:#fff;border:1px solid var(--line);padding:clamp(24px,4vw,36px);border-radius:var(--radius)}
.sim__field{margin-bottom:22px}
.sim__field:last-child{margin-bottom:0}
.sim__label{display:flex;justify-content:space-between;align-items:baseline;
  font-size:.85rem;font-weight:600;margin-bottom:.6em}
.sim__val{font-family:var(--serif);font-size:1.05rem;color:var(--accent)}
.sim__field input[type=range]{width:100%;accent-color:var(--accent)}
.sim__out{background:var(--bg-deep);color:#fff;padding:clamp(24px,4vw,36px);border-radius:var(--radius)}
.sim__out h3{color:#fff;font-size:1rem;letter-spacing:.08em;margin-bottom:1.2em}
.sim__row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  padding:14px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:.88rem}
.sim__row:last-of-type{border-bottom:0}
.sim__row b{font-family:var(--serif);font-size:1.5rem;font-weight:600;letter-spacing:.02em}
.sim__row--hero b{font-size:2.2rem;color:#E7C88A}

/* event */
.event-list{list-style:none;margin:0;padding:0}
.event-item{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(16px,3vw,32px);align-items:center;
  padding:24px 0;border-bottom:1px solid var(--line)}
@media(max-width:760px){.event-item{grid-template-columns:1fr;gap:12px}}
.event-date{font-family:var(--serif);font-size:1.05rem;letter-spacing:.04em;white-space:nowrap}
.event-date small{display:block;font-family:var(--sans);font-size:.68rem;color:var(--muted);letter-spacing:.14em}
.event-item__title{font-size:1.05rem;margin-bottom:.4em}
.event-item__meta{font-size:.8rem;color:var(--muted);margin:0}
.badge{display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.08em;
  padding:.35em .9em;border-radius:99px;background:var(--accent);color:#fff}
.badge--full{background:var(--brass)}
.badge--end{background:var(--muted)}

/* faq */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:22px 44px 22px 34px;position:relative;
  font-weight:600;font-size:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";position:absolute;left:0;top:22px;font-family:var(--serif);
  color:var(--brass);font-size:1rem}
.faq summary::after{content:"";position:absolute;right:8px;top:30px;width:9px;height:9px;
  border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);
  transform:rotate(45deg);transition:transform .25s}
.faq details[open] summary::after{transform:rotate(-135deg)}
.faq__a{padding:0 44px 24px 34px;color:var(--ink-soft);font-size:.92rem}
.faq__a p:last-child{margin-bottom:0}

/* cta band */
.cta-band{background:var(--accent);color:#fff;text-align:center;padding:clamp(48px,7vw,84px) 0}
.cta-band h2{color:#fff;font-size:clamp(1.4rem,3.4vw,2rem);margin-bottom:.8em}
.cta-band p{color:#D9E7E0;max-width:56ch;margin-inline:auto}
.cta-band__btns{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:2em}

/* footer */
.site-footer{background:var(--bg-deep);color:#C9C4BB;padding:clamp(48px,7vw,76px) 0 0;font-size:.85rem}
.site-footer a:hover{color:#fff}
.footer-top{display:grid;grid-template-columns:1.2fr 2fr;gap:clamp(28px,5vw,60px);
  padding-bottom:clamp(32px,5vw,52px);border-bottom:1px solid rgba(255,255,255,.14)}
@media(max-width:760px){.footer-top{grid-template-columns:1fr}}
.footer-brand{font-family:var(--serif);font-size:1.1rem;color:#fff;margin-bottom:1em}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:600px){.footer-nav{grid-template-columns:repeat(2,1fr)}}
.footer-nav ul{list-style:none;margin:0;padding:0}
.footer-nav li{margin-bottom:.7em}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding:22px 0;font-size:.74rem;color:#8E8880}

/* forms */
.form-row{margin-bottom:24px}
.form-row label{display:block;font-size:.88rem;font-weight:600;margin-bottom:.6em}
.req{display:inline-block;font-size:.66rem;font-weight:700;color:#fff;background:#A3402F;
  padding:.25em .6em;border-radius:2px;margin-left:.6em;vertical-align:2px}
.form-row input[type=text],.form-row input[type=email],.form-row input[type=tel],
.form-row select,.form-row textarea{
  width:100%;padding:.95em 1em;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;font-family:inherit;font-size:1rem;color:var(--ink)}
.form-row textarea{min-height:170px;resize:vertical}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
  outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}

/* utilities */
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.text-center{text-align:center}
.lead{font-size:clamp(1rem,2vw,1.12rem);color:var(--ink-soft)}
.small{font-size:.8rem;color:var(--muted)}
.prose h2{font-size:clamp(1.3rem,3vw,1.7rem);margin:2.4em 0 .9em}
.prose h3{font-size:clamp(1.1rem,2.4vw,1.3rem);margin:2em 0 .8em}
.prose h2:first-child,.prose h3:first-child{margin-top:0}
.prose img{margin:1.6em 0}
.prose ul,.prose ol{color:var(--ink-soft)}
.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}