/* ==========================================================================
   kumiwa about-site — shared design system
   Design tokens & common components (handoff: KUMIWA サイトリデザイン提案)
   ========================================================================== */
:root{
  /* backgrounds */
  --bg:#ffffff; --bg-soft:#f7f5f0; --bg-card:#fbfaf7; --tint:#eef6f6; --tint2:#e4f0f0; --chip:#f4f2ec;
  /* teal scale */
  --primary:#1f7a86; --primary-hover:#17616b; --teal-deep:#12343a; --teal-darkest:#0f2b30;
  --teal-accent:#7fc2cb; --on-dark:#eef6f6; --on-dark-2:#b9d6da; --on-dark-3:#dcecee;
  --on-dark-weak:#89b2b8; --on-dark-weak2:#8fb9bf;
  /* text */
  --text:#14181a; --text-body:#4a5257; --text-weak:#5b6367; --text-weak2:#8a8575;
  /* borders */
  --bd:#ece8e0; --bd2:#e6e2da; --bd3:#e7e3db; --bd4:#dfe7e8; --bd5:#d5e2e4; --bd6:#cfdcde;
  /* warning / before */
  --warn:#a2664f; --warn2:#c1876f; --warn-bg:#f6ece7;
  /* accent */
  --accent:#e8641e;
  /* shadows */
  --sh-btn:0 2px 10px rgba(31,122,134,.25);
  --sh-btn-lg:0 6px 20px rgba(31,122,134,.3);
  --sh-prod:0 30px 70px -30px rgba(20,50,55,.4);
  --sh-card:0 20px 44px -26px rgba(20,50,55,.4);
  --sh-dark:0 30px 60px -30px rgba(0,0,0,.6);
  --container:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Zen Kaku Gothic New',system-ui,-apple-system,sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.7;
}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-hover)}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em}
.mono{font-family:'Space Grotesk',sans-serif}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}

.container{max-width:var(--container);margin:0 auto;padding:0 28px}
.eyebrow{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:13px;letter-spacing:.08em;color:var(--primary)}
.section-h2{font-size:36px;font-weight:900;line-height:1.28;margin:12px 0 0}
.section-sub{font-size:16px;color:var(--text-body);margin:14px 0 0}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;border:0;cursor:pointer;transition:background .18s,color .18s,box-shadow .18s,border-color .18s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;border-radius:9px;padding:9px 18px;font-size:13.5px;box-shadow:var(--sh-btn)}
.btn-primary:hover{background:var(--primary-hover);color:#fff}
.btn-primary-lg{background:var(--primary);color:#fff;border-radius:11px;padding:15px 28px;font-size:16px;box-shadow:var(--sh-btn-lg)}
.btn-primary-lg:hover{background:var(--primary-hover);color:#fff}
.btn-ghost{border:1.5px solid var(--bd5);color:var(--primary);border-radius:9px;padding:9px 16px;font-size:13.5px;background:transparent}
.btn-ghost:hover{color:var(--primary-hover);border-color:var(--bd6)}
.btn-ghost-lg{border:1.5px solid var(--bd6);color:var(--primary-hover);border-radius:11px;padding:15px 26px;font-size:16px;background:#fff}
.btn-ghost-lg:hover{color:var(--primary-hover)}
.btn-white{background:#fff;color:var(--teal-deep);border-radius:12px;padding:16px 34px;font-size:17px;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.btn-white:hover{color:var(--teal-deep);background:#f2fbfb}
.btn-ghost-white{border:1.5px solid rgba(255,255,255,.5);color:#fff;border-radius:12px;padding:16px 30px;font-size:17px;background:transparent}
.btn-ghost-white:hover{color:#fff;background:rgba(255,255,255,.08)}

/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--bd)}
.site-header .bar{max-width:var(--container);margin:0 auto;padding:14px 28px;display:flex;align-items:center;gap:26px}
.brand{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:23px;letter-spacing:-.02em;color:var(--primary)}
.brand:hover{color:var(--primary)}
.site-nav{flex:1;display:flex;gap:24px;font-size:14px;font-weight:500}
.site-nav a{color:var(--text-body)}
.site-nav a:hover{color:var(--primary)}
.header-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:6px;color:var(--teal-deep)}
.nav-toggle svg{width:26px;height:26px}

/* ===== footer ===== */
.site-footer{background:var(--teal-darkest);color:var(--on-dark-weak2);padding:44px 28px}
.site-footer .inner{max-width:var(--container);margin:0 auto;display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.site-footer .brand-col{max-width:340px}
.site-footer .brand{color:#fff;font-size:22px}
.site-footer .desc{font-size:13px;color:var(--on-dark-weak);margin-top:10px;line-height:1.7}
.footer-cols{display:flex;gap:56px;flex-wrap:wrap}
.footer-cols h4{font-size:12.5px;letter-spacing:.06em;color:var(--on-dark-2);font-weight:700;margin-bottom:12px;font-family:'Space Grotesk',sans-serif}
.footer-cols ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer-cols a{color:#c3dde0;font-size:13.5px}
.footer-cols a:hover{color:#fff}
.footer-base{max-width:var(--container);margin:28px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#6f9ba1}

/* generic dark/soft section helpers */
.sec{padding:80px 28px}
.sec-white{background:#fff}
.sec-soft{background:var(--bg-soft)}
.sec-dark{background:var(--teal-deep);color:var(--on-dark)}
.center{text-align:center}

/* card grid primitives */
.reason-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.reason-card{border:1px solid var(--bd);border-radius:14px;padding:24px;background:var(--bg-card)}
.reason-card h3{font-size:16px;font-weight:700;margin:0 0 8px}
.reason-card p{font-size:13.5px;color:var(--text-weak);margin:0}
.icon-box{width:44px;height:44px;border-radius:11px;background:#f0ece3;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}

/* browser frame for screenshots */
.browser{border:1px solid var(--bd2);border-radius:16px;overflow:hidden;background:#fff;box-shadow:var(--sh-prod)}
.browser .chrome{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#f4f2ec;border-bottom:1px solid var(--bd2)}
.browser .dot{width:10px;height:10px;border-radius:50%;background:#d8d2c6}
.browser .shot{display:block;width:100%;height:auto}
.browser.cap .shot-wrap{position:relative;background:#eef1f0}

/* responsive */
@media (max-width:920px){
  .site-nav,.header-cta .btn-ghost{display:none}
  .nav-toggle{display:inline-flex}
  .site-header .bar{gap:14px}
  .reason-grid{grid-template-columns:repeat(2,1fr)}
  .section-h2{font-size:30px}
  .mobile-open .site-nav{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--bd);padding:14px 28px;gap:16px}
}
@media (max-width:560px){
  .reason-grid{grid-template-columns:1fr}
  .container,.sec{padding-left:20px;padding-right:20px}
}

/* ==========================================================================
   sub-page shared components
   ========================================================================== */
.page-hero{background:radial-gradient(120% 90% at 85% 0%,var(--tint) 0%,#ffffff 58%);padding:60px 28px 44px;text-align:center;border-bottom:1px solid var(--bd)}
.page-hero h1{font-size:40px;font-weight:900;margin:14px 0 0}
.page-hero .lead{font-size:16.5px;color:var(--text-body);max-width:660px;margin:16px auto 0}

/* generic 3-col feature cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:var(--bg-card);border:1px solid var(--bd);border-radius:16px;padding:26px}
.card h3{font-size:18px;font-weight:700;margin:0 0 10px}
.card p{font-size:14px;color:var(--text-weak);margin:0}
.card .num{font-family:'Space Grotesk',sans-serif;font-size:30px;font-weight:700;color:var(--primary);line-height:1}
.card .kicker{font-family:'Space Grotesk',sans-serif;font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--primary)}

/* numbered feature (features page) */
.num-card{position:relative;background:var(--bg-card);border:1px solid var(--bd);border-radius:16px;padding:26px 26px 26px 30px}
.num-card::before{content:'';position:absolute;left:0;top:22px;bottom:22px;width:4px;border-radius:0 4px 4px 0;background:var(--primary)}
.num-card .idx{font-family:'Space Grotesk',sans-serif;font-size:14px;font-weight:700;color:var(--primary)}
.num-card h3{font-size:18px;font-weight:700;margin:6px 0 8px}
.num-card p{font-size:14px;color:var(--text-weak);margin:0}

/* screenshot gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.gallery figure{margin:0}
.gallery .browser{box-shadow:var(--sh-card)}
.gallery figcaption{font-size:13px;color:var(--text-weak);margin-top:10px;font-weight:700}
.gallery figcaption span{display:block;font-weight:400;color:#8a8f8c;margin-top:2px;font-size:12.5px}

/* pricing */
.price-card{max-width:460px;margin:0 auto;background:#fff;border:2px solid var(--primary);border-radius:20px;padding:36px;box-shadow:var(--sh-card);text-align:center}
.price-card .kicker{font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--primary)}
.price-card .amt{font-size:56px;font-weight:900;line-height:1;margin:14px 0 4px}
.price-card .amt small{font-size:20px;font-weight:700;color:var(--text-weak)}
.price-card .sub{font-size:14px;color:var(--text-weak);margin:0 0 22px}
.price-list{list-style:none;margin:0 0 26px;padding:0;text-align:left;display:flex;flex-direction:column;gap:12px}
.price-list li{display:flex;gap:10px;font-size:15px}
.price-list .ck{color:var(--primary);font-weight:700}
.notes{max-width:760px;margin:34px auto 0}
.notes p{font-size:13px;color:var(--text-weak);margin:0 0 10px;line-height:1.7}

/* scenes */
.scene{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;background:var(--bg-card);border:1px solid var(--bd);border-radius:16px;padding:26px;margin-top:18px}
.scene .no{font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:700;color:#fff;background:var(--primary);border-radius:10px;padding:8px 12px;white-space:nowrap}
.scene h3{font-size:18px;font-weight:700;margin:2px 0 8px}
.scene p{font-size:14.5px;color:var(--text-body);margin:0}
.scene b{color:var(--text)}

/* faq (shared with top) */
.faq-list{max-width:760px;margin:0 auto}
.faq-item{border:1px solid var(--bd);border-radius:12px;background:var(--bg-card);margin-top:14px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;cursor:pointer;font-size:16px;font-weight:700;color:var(--text);padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit}
.faq-q .pm{color:var(--primary);font-size:22px;font-weight:400;transition:transform .2s;flex:none}
.faq-item.open .faq-q .pm{transform:rotate(45deg)}
.faq-a{display:none;font-size:14.5px;color:var(--text-body);padding:0 22px 20px}
.faq-item.open .faq-a{display:block}

/* form */
.form-card{max-width:640px;margin:0 auto;background:#fff;border:1px solid var(--bd);border-radius:20px;padding:32px;box-shadow:var(--sh-card)}
.field{margin-bottom:20px}
.field label{display:block;font-size:14px;font-weight:700;color:var(--text);margin-bottom:8px}
.field .req{color:#d0553a}
.field input,.field textarea{width:100%;border:1px solid var(--bd5);border-radius:10px;padding:11px 13px;font-size:15px;font-family:inherit;color:var(--text);background:#fff;transition:border-color .15s,box-shadow .15s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,122,134,.12)}
.form-submit{width:100%;justify-content:center}
.form-msg{text-align:center;font-size:14px;margin-top:16px;display:none}
.form-msg.show{display:block}
.form-msg.ok{color:#1f7a5a}
.form-msg.err{color:#c0402a}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* cta band */
.cta-band{background:radial-gradient(120% 120% at 50% 0%,#1f7a86 0%,#12343a 92%);color:#fff;text-align:center;padding:72px 28px}
.cta-band h2{font-size:30px;font-weight:900;margin:0 0 22px}
.cta-band .row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* prose (company etc.) */
.prose{max-width:720px;margin:0 auto}
.prose h2{font-size:22px;font-weight:900;margin:34px 0 12px}
.prose p{font-size:15px;color:var(--text-body);margin:0 0 14px}
.info-table{width:100%;border-collapse:collapse;margin-top:8px}
.info-table th,.info-table td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--bd);font-size:14.5px;vertical-align:top}
.info-table th{width:34%;color:var(--text-weak);font-weight:700}

@media (max-width:920px){
  .grid-3,.gallery{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .page-hero h1{font-size:32px}
}
@media (max-width:560px){
  .grid-3,.gallery{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr}
}

/* utilities & lightbox */
.nowrap{white-space:nowrap}
.zoomable{cursor:zoom-in}
.lightbox{position:fixed;inset:0;background:rgba(15,43,48,.86);display:none;align-items:center;justify-content:center;z-index:100;padding:24px;cursor:zoom-out}
.lightbox.open{display:flex}
.lightbox img{max-width:96vw;max-height:92vh;border-radius:10px;box-shadow:0 30px 80px -20px rgba(0,0,0,.7);cursor:zoom-out}
.lightbox .lb-hint{position:fixed;top:18px;right:22px;color:rgba(255,255,255,.75);font-size:13px;font-weight:700}