/* 合同会社ワイワイ コーポレートサイト / 設計メモは Docs/構成.txt を参照 */

:root{
  --orange:#f39800;
  --orange-deep:#d97f00;
  --orange-text:#8a5200;

  --ink:#1a1a1e;
  --ink-soft:#3c3c44;
  --muted:#5e5e68;

  --paper:#ffffff;
  --paper-warm:#faf6f0;
  --ink-bg:#17171b;
  --line:#e4ded6;
  --line-strong:#cdc5ba;

  --header-height:88px;
  color-scheme:light;
  font-family:"Noto Sans JP","Yu Gothic UI","Yu Gothic","Hiragino Sans","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  color:var(--ink);
  font-synthesis:none;
}

/* ---------- base ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 24px)}
body{
  background:var(--paper);
  margin:0;
  font-size:16px;
  line-height:1.8;
  letter-spacing:.02em;

  line-break:strict;
}
h1,h2,h3,.headline{text-wrap:balance}
p,li,dt,dd{text-wrap:pretty}
.work-card h3,.work-tags li,dd{overflow-wrap:break-word}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,p,dl,dd{margin:0}
p+p{margin-top:1.1em}
[hidden]{display:none!important}
a:focus-visible,button:focus-visible{outline:3px solid var(--orange-deep);outline-offset:4px}
input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--orange-deep);outline-offset:2px}
.skip-link{position:fixed;top:-100px;left:16px;background:var(--paper);z-index:100;padding:12px}
.skip-link:focus{top:12px}
.container{width:min(1120px,calc(100% - 112px));margin:auto}

.diamond-field{
  background-image:
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%),
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%);
  background-size:56px 56px;
  background-position:0 0,28px 28px;
}

/* ---------- header ---------- */
.header-slot{position:sticky;top:0;z-index:20;min-height:var(--header-height)}
.site-header{
  height:var(--header-height);
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:0 max(22px,4%);
  position:relative;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.brand{width:176px;flex-shrink:0}
.site-header nav{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:700;letter-spacing:.06em}
.site-header nav a{position:relative}
.site-header nav a:not(.nav-cta){padding:8px 0}
.site-header nav a:not(.nav-cta):after{
  content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--orange);transition:width .2s;
}
.site-header nav a:not(.nav-cta):hover:after,
.site-header nav a:not(.nav-cta)[aria-current]:after{width:100%}
.nav-cta{
  display:inline-flex;align-items:center;gap:10px;
  margin-left:14px;
  border:1px solid var(--ink);
  padding:12px 22px;
  color:var(--ink);
  transition:background .2s,border-color .2s;
}
.nav-cta:before{
  content:"";width:7px;height:7px;background:var(--orange);
  transform:rotate(45deg);flex-shrink:0;
}
.nav-cta:hover{background:var(--orange);border-color:var(--orange);color:var(--ink)}
.menu-button{display:none}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--ink-bg);
  color:#fff;
  min-height:560px;
  height:calc(84svh - var(--header-height));
  max-height:760px;
  display:grid;align-items:center;
}
.hero:before{
  content:"";position:absolute;inset:0;
  color:rgba(243,152,0,.06);
  background-image:
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%),
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%);
  background-size:64px 64px;
  background-position:0 0,32px 32px;
  -webkit-mask-image:linear-gradient(105deg,transparent 42%,#000 100%);
  mask-image:linear-gradient(105deg,transparent 42%,#000 100%);
}
.hero-inner{position:relative;z-index:1;padding:48px 0}
.hero-label{
  font-size:12px;font-weight:700;letter-spacing:.28em;color:var(--orange);
  display:flex;align-items:center;gap:12px;margin-bottom:22px;
}
.hero-label:before{content:"";width:9px;height:9px;background:var(--orange);transform:rotate(45deg)}
.hero h1{
  font-size:clamp(30px,4.4vw,56px);
  line-height:1.55;font-weight:700;letter-spacing:.03em;
}
.hero-lead{margin-top:26px;max-width:44em;color:#d5d2cc;font-size:15px}
.hero-actions{margin-top:40px}
.hero-mark{
  position:absolute;right:6%;bottom:-70px;width:300px;height:300px;
  transform:rotate(45deg);pointer-events:none;
}
.hero-mark:before,.hero-mark:after{content:"";position:absolute}
.hero-mark:before{inset:0;background:var(--orange);opacity:.14}
.hero-mark:after{
  left:-74%;top:3%;width:68%;height:68%;
  border:2px solid var(--orange);opacity:.45;
}

.button{
  display:inline-flex;align-items:center;gap:28px;
  background:var(--orange);color:var(--ink);
  font-weight:700;font-size:14px;letter-spacing:.06em;
  padding:16px 26px;transition:background .2s,color .2s;
}
.button:hover{background:#fff;color:var(--ink)}

/* ---------- section 共通 ---------- */
.section{padding:104px 0}
.section-heading{
  display:flex;flex-direction:column;gap:8px;
  font-size:28px;font-weight:700;letter-spacing:.04em;line-height:1.45;
  margin:0 0 48px;
}
.section-heading .en{
  font-size:12px;font-weight:700;letter-spacing:.22em;color:var(--orange-text);
  display:flex;align-items:center;gap:10px;text-transform:uppercase;
}
.section-heading .en:before{content:"";width:8px;height:8px;background:var(--orange);transform:rotate(45deg)}
.headline{font-size:clamp(25px,2.6vw,36px);line-height:1.6;letter-spacing:.03em;font-weight:700}

.split-layout{display:grid;grid-template-columns:24% 1fr;gap:6%}
.split-layout .section-heading{align-self:start;margin:6px 0 0;position:sticky;top:calc(var(--header-height) + 32px)}

/* ---------- philosophy ---------- */
.philosophy{background:var(--paper);padding:120px 0}
.philosophy .headline{margin-bottom:36px}
.philosophy-text{max-width:640px;color:var(--ink-soft)}
.philosophy-text p+p{margin-top:22px}

/* ---------- business ---------- */
.business{background:var(--paper-warm)}
.business-intro{max-width:640px;margin-bottom:56px}
.business-intro>p{color:var(--ink-soft)}
.business-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.business-grid p{color:var(--ink-soft);font-size:15px}

/* ---------- works ---------- */
.works{background:var(--paper)}
.works-grid{display:grid;gap:60px}
.works-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.bar-heading{
  display:flex;align-items:center;gap:11px;
  font-size:17px;font-weight:700;letter-spacing:.06em;
  padding-bottom:14px;margin-bottom:22px;
  border-bottom:1px solid var(--line-strong);
}
.bar-heading:before{content:"";width:8px;height:8px;background:var(--orange);transform:rotate(45deg);flex-shrink:0}
.works-empty .empty-title{font-size:17px;font-weight:700;line-height:1.75;margin-bottom:14px}
.works-empty>p:last-child{color:var(--muted);font-size:14px}

.work-card{display:flex;flex-direction:column;border-top:3px solid var(--orange);padding:28px;background:var(--paper-warm)}
.work-card h3{font-size:19px;margin:8px 0 18px;line-height:1.5}
.work-label{font-size:13px;color:var(--muted);letter-spacing:.1em}
.work-tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0 0 22px}
.work-tags li{background:#fff;border:1px solid var(--line);font-size:13px;padding:3px 12px}
.work-card dl{display:flex;flex-wrap:wrap;gap:10px 36px;margin:0 0 18px}
.work-card dt{font-size:14px;font-weight:700;color:var(--ink-soft)}
.work-card dd{font-size:14px;margin-top:4px}
.work-card .work-note{margin-top:auto;padding-top:4px;font-size:13px;color:var(--muted)}

/* ---------- company ---------- */
.company{background:var(--paper-warm)}
.company-table{margin:0}
.company-table>div{
  display:grid;grid-template-columns:132px 1fr;gap:28px;
  border-bottom:1px solid var(--line);padding:20px 0;
}
.company-table>div:first-child{border-top:2px solid var(--ink)}
.company-table dt{font-size:14px;font-weight:700;color:var(--ink-soft)}
.company-table dd{margin:0}

/* ---------- contact ---------- */
.contact{
  position:relative;background:var(--ink-bg);color:#fff;
}
.contact:before{
  content:"";position:absolute;inset:0;
  color:rgba(243,152,0,.045);
  background-image:
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%),
    linear-gradient(45deg,currentColor 25%,transparent 25%,transparent 75%,currentColor 75%);
  background-size:64px 64px;background-position:0 0,32px 32px;
  -webkit-mask-image:linear-gradient(75deg,#000 0,transparent 55%);
  mask-image:linear-gradient(75deg,#000 0,transparent 55%);
}
.contact .container{position:relative;z-index:1}
.contact .section-heading .en{color:var(--orange)}
.contact-intro{font-size:15px;margin-top:24px;color:#d5d2cc}
form label{display:flex;gap:12px;align-items:center;font-weight:700;margin-bottom:9px;font-size:14px;letter-spacing:.04em}
.required,.optional{font-size:11px;letter-spacing:.04em;font-weight:700;padding:2px 8px}
.required{background:var(--orange);color:var(--ink)}
.optional{background:#33333b;color:#c8c5bf}
input,select,textarea{
  width:100%;border:1px solid #4a4a54;border-radius:0;background:#1f1f25;
  padding:13px 16px;margin:0 0 24px;color:#fff;
}
input::placeholder,textarea::placeholder{color:#8a8a94}
select{appearance:none;padding-right:44px;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--orange) 50%),linear-gradient(135deg,var(--orange) 50%,transparent 50%);
  background-position:calc(100% - 22px) 50%,calc(100% - 17px) 50%;background-size:5px 5px;background-repeat:no-repeat}
select:invalid{color:#8a8a94}
select option{color:#fff;background:#1f1f25}
textarea{resize:vertical;min-height:160px}
.form-policy{font-size:13px;color:#cfccc6;margin:-4px 0 20px}
.form-policy a{color:var(--orange);text-decoration:underline;text-underline-offset:3px}
.cf-turnstile{min-height:65px;margin-bottom:8px}
.form-status{
  border-left:2px solid var(--orange);padding:2px 0 2px 16px;margin-top:24px;
  font-size:14px;color:#cfccc6;
}
.submit-button{
  display:flex;justify-content:space-between;align-items:center;
  background:var(--orange);color:var(--ink);border:0;font-weight:700;letter-spacing:.06em;
  padding:18px 26px;min-width:280px;margin-top:6px;transition:background .2s;
}
.submit-button:hover:not(:disabled){background:#fff}
.submit-button span{margin-left:32px}
.submit-button:disabled{cursor:not-allowed;background:#33333b;color:#9a9aa2}

/* ---------- privacy policy ---------- */
.policy-body{max-width:760px;color:var(--ink-soft);font-size:15px}
.policy-body h2{
  display:flex;align-items:center;gap:11px;
  font-size:17px;font-weight:700;letter-spacing:.06em;color:var(--ink);
  padding-bottom:12px;margin:48px 0 18px;border-bottom:1px solid var(--line-strong);
}
.policy-body h2:before{content:"";width:8px;height:8px;background:var(--orange);transform:rotate(45deg);flex-shrink:0}
.policy-body ul{margin:14px 0 0;padding-left:1.4em}
.policy-body li+li{margin-top:6px}
.policy-body ul+p{margin-top:14px}
.policy-actions{margin-top:36px}
.policy-actions .button:hover{background:var(--ink);color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-warm);padding:34px 0;border-top:1px solid var(--line)}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.footer-brand{width:160px}
.footer-link{font-size:12px;font-weight:700;letter-spacing:.06em;margin-left:auto}
.footer-link:hover{color:var(--orange-text)}
.site-footer small{font-size:12px;color:var(--muted)}
.back-top{font-size:12px;font-weight:700;letter-spacing:.06em}
.back-top span{padding-left:20px;color:var(--orange-text)}

/* ---------- responsive ---------- */
@media(min-width:1600px){
  .container{width:1200px}
}

@media(max-width:1050px){
  :root{--header-height:80px}
  .site-header{gap:18px}
  .brand{width:150px}
  .site-header nav{gap:18px;font-size:12px}
  .nav-cta{padding:11px 16px;margin-left:10px;gap:8px}
  .container{width:calc(100% - 72px)}
  .business-intro{margin-bottom:40px}
  .business-grid{gap:36px}
  .bar-heading{font-size:16px}
  .split-layout{grid-template-columns:1fr;gap:34px}
  .split-layout .section-heading{position:static;margin:0}
  .works-grid{gap:48px}
}

@media(max-width:760px){
  :root{--header-height:72px}
  .site-header{padding:0 20px}
  .brand{width:136px}
  .menu-button{display:flex;align-items:center;gap:12px;border:0;background:transparent;padding:12px 0;font-size:13px;font-weight:700}
  .menu-icon{width:22px;height:12px;border-top:2px solid;border-bottom:2px solid}
  .site-header nav{
    position:absolute;top:var(--header-height);left:0;right:0;
    background:#fff;padding:18px;display:none;flex-direction:column;align-items:stretch;gap:4px;
    box-shadow:0 14px 24px #0000001a;border-bottom:1px solid var(--line);
  }
  .site-header nav.is-open{display:flex}
  .site-header nav a{padding:13px}
  .nav-cta{display:flex;justify-content:center;margin:10px 0 0;padding:13px}

  .container{width:calc(100% - 44px)}
  .hero{min-height:480px;height:auto;max-height:none;padding:64px 0 72px}
  .hero-inner{padding:0}
  .hero h1{font-size:clamp(23px,7vw,38px);line-height:1.6}
  .hero-lead{font-size:14px;margin-top:20px}
  .hero-actions{margin-top:32px}
  .button{width:100%;justify-content:space-between}
  .hero-mark{width:190px;height:190px;right:-70px;bottom:-80px}
  .hero-mark:before{opacity:.10}
  .hero-mark:after{display:none}

  .section{padding:68px 0}
  .philosophy{padding:72px 0}
  .section-heading{font-size:23px;margin-bottom:30px}
  .headline{font-size:25px}
  .business-grid{grid-template-columns:1fr;gap:34px}
  .works-grid{gap:44px}
  .works-list{grid-template-columns:1fr;gap:16px}
  .company-table>div{grid-template-columns:86px 1fr;gap:16px;padding:17px 0}
  .company-table dd{font-size:15px}
  .contact-intro{margin-top:18px}
  .submit-button{width:100%;min-width:0}
  .footer-inner{flex-wrap:wrap;gap:18px}
  .footer-brand{width:136px}
  .footer-link{margin-left:0}
  .site-footer small{order:3;width:100%}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{transition:none!important}
}