/* B案 v3 — トップ試作＋サイト共通の基本スタイル。外部フォント・画像・JavaScriptなし */
:root{
  --canvas:#fff9f2;
  --paper:#fffdf9;
  --cream:#fff0d7;
  --peach:#fce2d7;
  --apricot:#ffddbf;
  --sage:#e7ebd5;
  --ink:#382f2b;
  --muted:#5f5048;
  --clay:#7b3f30;
  --cta:#91442d;
  --cta-hover:#793b29;
  --line:#e9ded4;
  --header-h:72px;
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--canvas);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:16px;line-height:1.8;font-feature-settings:"palt" 1}
a{color:inherit}
a:focus-visible{outline:3px solid var(--clay);outline-offset:4px;border-radius:4px}
.skip-link{position:absolute;top:-100px;left:16px;z-index:50;background:#fff;padding:10px 16px}
.skip-link:focus{top:12px}
.wrap{width:min(1180px,calc(100% - 64px));margin-inline:auto}

/* Header */
.site-header{position:sticky;top:0;z-index:10;height:var(--header-h);background:rgba(255,249,242,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(123,63,48,.1)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand-mark{font-size:24px;font-weight:800;letter-spacing:-.04em;color:var(--clay)}
.brand-divider{width:1px;height:30px;background:#d7c6b6}
.brand-caption{white-space:nowrap;font-size:12px;line-height:1.5;font-weight:650;letter-spacing:.03em;color:var(--muted)}
.site-nav{display:flex;align-items:center;gap:28px}
.site-nav a{white-space:nowrap;font-size:14px;font-weight:700;text-decoration:none;color:var(--muted)}
.site-nav a:hover{text-decoration:underline;text-underline-offset:5px}
.site-nav .nav-contact{padding:9px 18px;border:1px solid #cfaa96;border-radius:999px;color:var(--clay)}
.site-nav .nav-contact:hover{background:var(--paper);text-decoration:none}

/* Cover (first view) */
.cover{position:relative;min-height:calc(100vh - var(--header-h));min-height:calc(100svh - var(--header-h));display:flex;flex-direction:column;justify-content:center;gap:clamp(28px,4vh,48px);padding:clamp(32px,5vh,64px) 0 clamp(28px,4vh,48px);overflow:hidden}
.cover::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 55% 70% at 82% 30%,#fdeee0 0%,rgba(255,249,242,0) 70%);pointer-events:none}
.cover-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:clamp(40px,5vw,80px);align-items:center}

.status-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;margin:0}
.status-chip{display:inline-flex;align-items:center;padding:3px 12px;border:1px solid #c99c82;border-radius:999px;background:var(--paper);font-size:13px;font-weight:750;color:var(--clay);letter-spacing:.04em}
.status-text{font-size:13px;line-height:1.6;color:var(--muted)}

.project-title{margin:clamp(20px,3vh,32px) 0 0;font-weight:750;line-height:1.22;letter-spacing:-.02em;font-size:clamp(40px,4.6vw,66px);color:var(--ink);word-break:keep-all}
.title-brand{color:var(--clay);letter-spacing:-.03em}
.title-line{display:block}
.title-line:last-child{color:var(--clay)}

.purpose{margin:clamp(18px,2.6vh,28px) 0 0;padding-left:18px;border-left:3px solid #d9a88a;font-size:clamp(18px,1.6vw,21px);line-height:1.75;font-weight:700;color:#4d3d35}
.purpose .phrase{display:inline-block}
.lead{max-width:34em;margin:14px 0 0;font-size:16px;line-height:1.9;color:var(--muted)}

.cover-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 14px;margin-top:clamp(22px,3vh,32px)}
.button-primary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:52px;padding:0 24px;border-radius:8px;font-size:15px;font-weight:750;text-decoration:none}
.button-primary{background:var(--cta);color:#fff}
.button-primary:hover{background:var(--cta-hover)}
.button-secondary{border:1px solid #cfaa96;background:var(--paper);color:var(--clay)}
.button-secondary:hover{background:#fff4e8}

/* Plate: what we protect */
.plate{position:relative;margin:0;padding:clamp(28px,3.4vw,44px);background:var(--paper);border:1px solid #eaddd1;border-radius:20px;box-shadow:0 24px 60px rgba(102,67,45,.08);overflow:hidden}
.plate-shapes{position:absolute;inset:0;pointer-events:none}
.shape{position:absolute;display:block}
.shape-sun{width:220px;height:220px;right:-70px;top:-80px;border-radius:50%;background:var(--apricot);opacity:.55}
.shape-arch{width:160px;height:200px;right:34px;bottom:-110px;border-radius:80px 80px 0 0;background:var(--peach);opacity:.7}
.shape-leaf{width:90px;height:90px;right:-30px;bottom:70px;border-radius:0 60% 0 60%;background:var(--sage);opacity:.9}
.plate-body{position:relative}
.plate-kicker{margin:0;font-size:13px;font-weight:750;letter-spacing:.06em;color:var(--clay)}
.plate-title{margin:8px 0 0;font-size:clamp(21px,1.9vw,26px);line-height:1.5;font-weight:750;letter-spacing:-.01em}
.protect-list{list-style:none;margin:clamp(18px,2.6vh,26px) 0 0;padding:0;display:grid;gap:10px}
.protect-list li{display:flex;align-items:center;gap:16px;padding:14px 18px;border-radius:12px;background:var(--cream)}
.protect-list li:nth-child(2){background:#fbeae1}
.protect-list li:nth-child(3){background:#eef0e1}
.protect-num{display:grid;place-items:center;flex:none;width:40px;height:40px;border-radius:50%;background:var(--paper);font-size:13px;font-weight:800;color:var(--clay)}
.protect-text strong,.protect-text small{display:block}
.protect-text strong{font-size:18px;line-height:1.45}
.protect-text small{font-size:14px;line-height:1.5;color:var(--muted)}
.plate-note{margin:14px 0 0;font-size:13px;line-height:1.7;color:var(--muted)}

/* About band */
.about-band{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;background:var(--paper);border:1px solid var(--line);border-radius:16px}
.about-item{padding:22px 26px}
.about-item+.about-item{border-left:1px solid var(--line)}
.about-item dt{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:750;color:var(--ink)}
.about-num{font-size:12px;font-weight:800;letter-spacing:.08em;color:#a0664a}
.about-item dd{margin:6px 0 0;font-size:14.5px;line-height:1.8;color:var(--muted)}

/* Placeholder & footer */
.placeholder{padding:40px 0;background:#f6ebe0;border-top:1px solid var(--line)}
.placeholder p{margin:0;font-size:14px;color:var(--muted)}
.placeholder strong{color:var(--ink)}
.placeholder a{color:var(--clay);text-underline-offset:3px}
.site-footer{padding:28px 0 32px;background:#55463e;color:#f3e4d6}
.footer-inner p{margin:0;font-size:13px;line-height:1.8}
.footer-inner .footer-name{font-size:15px;font-weight:750;color:#fff7ed;margin-bottom:4px}
.footer-inner .footer-note{margin-top:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.16);color:#dccabd}

/* Short desktop screens (e.g. 13" MacBook with browser chrome) */
@media (min-width:961px) and (max-height:820px){
  .cover{gap:22px;padding:24px 0 22px}
  .project-title{margin-top:16px}
  .purpose{margin-top:16px}
  .cover-actions{margin-top:20px}
  .project-title{font-size:clamp(38px,4.1vw,56px)}
  .lead{font-size:15px}
  .protect-list li{padding:10px 16px}
  .plate-note{margin-top:10px;font-size:12.5px}
  .about-item{padding:16px 22px}
  .about-item dd{font-size:14px;line-height:1.7}
}

/* Tablet */
@media (max-width:960px){
  .wrap{width:calc(100% - 48px)}
  .cover{min-height:0}
  .cover-grid{grid-template-columns:1fr;gap:32px}
  .about-band{grid-template-columns:1fr}
  .about-item+.about-item{border-left:0;border-top:1px solid var(--line)}
  .site-nav{gap:0}
  .site-nav a:not(.nav-contact){display:none}
}

/* Phone */
@media (max-width:640px){
  :root{--header-h:64px}
  .wrap{width:calc(100% - 32px)}
  .brand{gap:10px}
  .brand-mark{font-size:20px}
  .brand-divider{height:24px}
  .brand-caption{font-size:10.5px}
  .site-nav .nav-contact{font-size:13px;padding:7px 14px}
  .cover{padding:28px 0 32px;gap:28px}
  .status-text{font-size:12.5px}
  .project-title{font-size:clamp(30px,9.2vw,40px);line-height:1.28}
  .purpose{font-size:17px;padding-left:14px}
  .lead{font-size:15px}
  .cover-actions{flex-direction:column;align-items:stretch}
  .button-primary,.button-secondary{width:100%}
  .plate{padding:24px 20px;border-radius:16px}
  .protect-list li{padding:12px 14px;gap:12px}
  .protect-num{width:34px;height:34px;font-size:12px}
  .protect-text strong{font-size:16.5px}
  .protect-text small{font-size:13.5px}
  .about-item{padding:18px 20px}
}

@media (max-width:400px){
  .brand-divider,.brand-caption{display:none}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}