/* ============================================================
   MATE SERIES — 墨と光のスペクトル / プロダクトページ共有CSS
   ハブ(index.html)とトークンを同期させること
   ============================================================ */
:root{
  --ink:#0d0b09;
  --ink-2:#14110e;
  --ink-3:#1c1813;
  --washi:#f2ecdf;
  --washi-dim:#b8b0a0;
  --washi-faint:#7c756a;
  --hairline:rgba(242,236,223,.12);

  --c01:#8b7cf6; --c02:#34c79a; --c03:#ff7a6e; --c04:#5aa7f0;
  --c05:#e8b54a; --c06:#b58cf0; --c07:#f09a3e; --c08:#f06ea9;
  --c09:#e07a8a; --c10:#f0884a; --c11:#4ab8d4; --c12:#6fd1c2;
  --c13:#3fae9f; --c14:#e07a64;

  --spectrum:linear-gradient(90deg,
    var(--c01),var(--c02),var(--c03),var(--c04),var(--c05),
    var(--c06),var(--c07),var(--c08),var(--c09),var(--c10),
    var(--c11),var(--c12),var(--c13),var(--c14));

  --serif:"Shippori Mincho B1","Hiragino Mincho ProN",serif;
  --sans:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN",sans-serif;
  --latin:"Fraunces",serif;
  --ease:cubic-bezier(.22,1,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--ink);color:var(--washi);
  font-family:var(--sans);font-weight:400;
  line-height:1.9;letter-spacing:.02em;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
::selection{background:var(--accent,var(--c05));color:var(--ink)}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}

.skip-link{position:absolute;left:-9999px;top:0;z-index:10000;background:var(--washi);color:var(--ink);padding:10px 18px;font-size:13px}
.skip-link:focus{left:12px;top:12px}

body::after{
  content:"";position:fixed;inset:-50%;z-index:9990;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity:.05;animation:grain 9s steps(10) infinite;
}
@keyframes grain{
  0%,100%{transform:translate(0,0)} 10%{transform:translate(-3%,2%)}
  30%{transform:translate(2%,-4%)} 50%{transform:translate(-4%,-2%)}
  70%{transform:translate(3%,3%)} 90%{transform:translate(-2%,4%)}
}

.progress{position:fixed;top:0;left:0;height:2px;width:100%;z-index:9999;background:var(--spectrum);transform-origin:0 50%;transform:scaleX(0)}

@media(pointer:fine){
  .cursor-dot,.cursor-ring{position:fixed;top:0;left:0;z-index:9995;pointer-events:none;border-radius:50%;transform:translate(-50%,-50%)}
  .cursor-dot{width:6px;height:6px;background:var(--washi)}
  .cursor-ring{width:34px;height:34px;border:1px solid rgba(242,236,223,.4);transition:width .35s var(--ease),height .35s var(--ease),border-color .35s,background .35s}
  .cursor-ring.is-hover{width:64px;height:64px;border-color:rgba(242,236,223,.9);background:rgba(242,236,223,.06)}
}

/* ---- header / footer（ハブと同一） ---- */
.site-head{position:fixed;top:0;left:0;right:0;z-index:1000;display:flex;align-items:center;justify-content:space-between;padding:22px clamp(20px,4vw,56px);transition:background .5s,backdrop-filter .5s,padding .5s}
.site-head.scrolled{background:rgba(13,11,9,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:14px clamp(20px,4vw,56px);border-bottom:1px solid var(--hairline)}
.brand{display:flex;align-items:baseline;gap:12px}
.brand .mark{font-family:var(--latin);font-weight:800;font-style:italic;font-size:24px;line-height:1;background:var(--spectrum);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand .name{font-family:var(--serif);font-weight:700;font-size:15px;letter-spacing:.18em}
.head-nav{display:flex;gap:34px;font-size:12.5px;letter-spacing:.22em}
.head-nav a{position:relative;padding:4px 0;color:var(--washi-dim);transition:color .3s}
.head-nav a:hover{color:var(--washi)}
.head-nav a::after{content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--spectrum);transform:scaleX(0);transform-origin:0 50%;transition:transform .45s var(--ease)}
.head-nav a:hover::after{transform:scaleX(1)}
@media(max-width:760px){.head-nav{display:none}}

footer{border-top:1px solid var(--hairline);padding:40px clamp(20px,5vw,72px);display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:11.5px;letter-spacing:.18em;color:var(--washi-faint)}
footer .f-brand{display:flex;align-items:baseline;gap:10px}
footer .mark{font-family:var(--latin);font-style:italic;font-weight:800;font-size:17px;background:var(--spectrum);-webkit-background-clip:text;background-clip:text;color:transparent}
footer nav{display:flex;gap:26px}
footer nav a{transition:color .3s}
footer nav a:hover{color:var(--washi)}

/* ---- buttons / chips ---- */
.btn{position:relative;display:inline-flex;align-items:center;gap:10px;padding:15px 30px;font-size:13px;letter-spacing:.2em;border:1px solid var(--hairline);border-radius:999px;overflow:hidden;transition:color .4s,border-color .4s;cursor:pointer}
.btn::before{content:"";position:absolute;inset:0;background:var(--washi);transform:translateY(101%);transition:transform .5s var(--ease);z-index:-1;border-radius:999px}
.btn:hover{color:var(--ink);border-color:var(--washi)}
.btn:hover::before{transform:translateY(0)}
.btn.ghost{color:var(--washi-dim)}
.btn.ghost:hover{color:var(--ink)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.chip{font-size:10.5px;letter-spacing:.26em;padding:7px 14px;border-radius:999px;border:1px solid var(--hairline);color:var(--washi-dim);white-space:nowrap}
.chip.live{border-color:color-mix(in srgb,var(--accent) 55%,transparent);color:var(--accent)}

/* ============================================================
   PRODUCT HERO
   ============================================================ */
.p-hero{position:relative;min-height:92svh;display:grid;align-items:center;padding:130px clamp(20px,5vw,72px) 70px;overflow:hidden}
.aurora{position:absolute;inset:0;pointer-events:none;filter:blur(90px);opacity:.5}
.aurora i{position:absolute;border-radius:50%}
.aurora-accent i:nth-child(1){width:44vw;height:44vw;left:-10vw;top:-12vw;background:radial-gradient(circle,color-mix(in srgb,var(--accent) 30%,transparent),transparent 65%);animation:drift1 21s ease-in-out infinite alternate}
.aurora-accent i:nth-child(2){width:36vw;height:36vw;right:-8vw;bottom:-12vw;background:radial-gradient(circle,color-mix(in srgb,var(--accent) 18%,transparent),transparent 65%);animation:drift2 25s ease-in-out infinite alternate}
@keyframes drift1{to{transform:translate(6vw,4vw) scale(1.1)}}
@keyframes drift2{to{transform:translate(-5vw,-4vw) scale(.94)}}

.hero-bignum{
  position:absolute;right:clamp(-30px,2vw,60px);top:6vh;z-index:0;
  font-family:var(--latin);font-style:italic;font-weight:300;
  font-size:clamp(180px,30vw,460px);line-height:1;
  color:transparent;-webkit-text-stroke:1px color-mix(in srgb,var(--accent) 36%,transparent);
  pointer-events:none;user-select:none;
}
.p-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(30px,5vw,80px);align-items:center}
.p-hero-copy{max-width:640px}
.kicker{display:flex;align-items:center;gap:14px;font-family:var(--latin);font-style:italic;font-weight:500;font-size:13px;letter-spacing:.3em;color:var(--washi-dim);text-transform:uppercase}
.kicker::before{content:"";width:48px;height:1px;background:var(--spectrum);flex:none}
.name-row{display:flex;align-items:center;gap:18px;margin:26px 0 18px;flex-wrap:wrap}
.name-row .app-icon{width:64px;height:64px;border-radius:16px;box-shadow:0 0 0 1px rgba(242,236,223,.12),0 0 34px -6px var(--accent)}
.name-row .app-wordmark{
  height:clamp(46px,5vw,66px);width:auto;max-width:min(420px,72vw);object-fit:contain;
  filter:drop-shadow(0 6px 22px rgba(0,0,0,.55)) drop-shadow(0 0 20px color-mix(in srgb,var(--accent) 30%,transparent));
}
.app-name{font-family:var(--latin);font-weight:600;font-size:clamp(30px,3.6vw,46px);letter-spacing:.01em}
.app-name i{font-style:italic;font-weight:400;color:var(--accent)}
.p-hero-copy h1{font-family:var(--serif);font-weight:800;font-size:clamp(28px,3.6vw,46px);line-height:1.65;letter-spacing:.05em;margin-bottom:20px}
.p-hero-copy .lead{font-size:14.5px;color:var(--washi-dim);line-height:2.2;margin-bottom:26px}
.proof-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.proof-chip{font-size:11.5px;color:var(--washi-dim);border:1px solid var(--hairline);border-radius:10px;padding:9px 14px;line-height:1.7}
.proof-chip b{display:block;color:var(--washi);font-weight:700;font-size:12.5px;letter-spacing:.06em}

.hero-art{position:relative;display:flex;justify-content:center;align-items:center;min-height:380px}
.phone-card{width:min(46%,230px);border-radius:26px;overflow:hidden;box-shadow:0 34px 90px -20px rgba(0,0,0,.75),0 0 50px -12px color-mix(in srgb,var(--accent) 60%,transparent),0 0 0 1px rgba(242,236,223,.12)}
.phone-card img{width:100%}
.pc-a{transform:rotate(-5deg) translateX(8%)}
.pc-b{transform:rotate(4deg) translateX(-8%) translateY(9%)}
.hero-art-icon .icon-stage{position:relative;padding:46px}
.hero-art-icon .icon-stage::before{content:"";position:absolute;inset:0;border-radius:50%;border:1px dashed color-mix(in srgb,var(--accent) 40%,transparent);animation:spin 50s linear infinite}
.hero-art-icon img{width:clamp(150px,16vw,230px);border-radius:24%;box-shadow:0 30px 90px -18px rgba(0,0,0,.8),0 0 70px -8px color-mix(in srgb,var(--accent) 70%,transparent),0 0 0 1px rgba(242,236,223,.14)}
@keyframes spin{to{transform:rotate(360deg)}}

@media(max-width:920px){
  .p-hero{min-height:auto;padding-top:120px}
  .p-hero-grid{grid-template-columns:1fr}
  .hero-bignum{font-size:clamp(140px,38vw,260px);top:60px}
  .hero-art{min-height:0;margin-top:8px}
}

.spectrum-hairline{height:1px;background:var(--spectrum);opacity:.65}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{padding:clamp(80px,11vh,140px) clamp(20px,5vw,72px);position:relative}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:clamp(36px,5vh,60px);flex-wrap:wrap}
.sec-title{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3.4vw,42px);line-height:1.5;letter-spacing:.06em}
.sec-title small{display:block;font-family:var(--latin);font-style:italic;font-weight:400;font-size:12.5px;letter-spacing:.34em;color:var(--washi-faint);margin-bottom:14px;text-transform:uppercase}
.sec-note{max-width:400px;font-size:13.5px;color:var(--washi-dim);line-height:2.1}

/* flow（番号付き手順） */
.flow-list{border-top:1px solid var(--hairline)}
.flow-row{display:grid;grid-template-columns:96px 1fr;gap:clamp(16px,3vw,48px);padding:30px clamp(4px,1vw,18px);border-bottom:1px solid var(--hairline);align-items:baseline;transition:padding .4s var(--ease)}
.flow-row:hover{padding-left:clamp(14px,2vw,34px)}
.fr-num{font-family:var(--latin);font-style:italic;font-weight:300;font-size:30px;color:var(--washi-faint);transition:color .35s}
.flow-row:hover .fr-num{color:var(--accent)}
.flow-row h3{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.06em;margin-bottom:8px}
.flow-row p{font-size:13.5px;color:var(--washi-dim);line-height:2;max-width:640px}
@media(max-width:680px){.flow-row{grid-template-columns:52px 1fr}.fr-num{font-size:21px}}

/* dark band（出力・特徴） */
.p-dark{background:var(--ink-2);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}
.dark-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:clamp(36px,6vw,90px);align-items:start}
.dk-list{border-top:1px solid var(--hairline)}
.dk-item{padding:22px 4px;border-bottom:1px solid var(--hairline)}
.dk-item h3{font-family:var(--serif);font-size:16px;font-weight:700;letter-spacing:.06em;margin-bottom:6px;position:relative;padding-left:18px}
.dk-item h3::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.dk-item p{font-size:13px;color:var(--washi-dim);line-height:2}
@media(max-width:880px){.dark-grid{grid-template-columns:1fr}}

/* screens（横スクロールレール） */
.screens-rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:min(64vw,300px);
  gap:clamp(18px,3vw,34px);overflow-x:auto;padding:10px 4px 26px;
  scroll-snap-type:x mandatory;scrollbar-width:thin;scrollbar-color:var(--washi-faint) transparent;
}
.screen-card{scroll-snap-align:start}
.screen-card img{border-radius:22px;box-shadow:0 26px 70px -18px rgba(0,0,0,.7),0 0 40px -14px color-mix(in srgb,var(--accent) 55%,transparent),0 0 0 1px rgba(242,236,223,.12)}
.screen-card figcaption{margin-top:14px;font-size:12px;color:var(--washi-dim);letter-spacing:.06em}

/* usecases / 汎用カード */
.uc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1px;background:var(--hairline);border:1px solid var(--hairline)}
.uc-card{background:var(--ink);padding:30px 26px;transition:background .4s}
.uc-card:hover{background:var(--ink-3)}
.uc-card h3{font-family:var(--serif);font-size:16px;font-weight:700;letter-spacing:.06em;margin-bottom:10px}
.uc-card p{font-size:13px;color:var(--washi-dim);line-height:2}

/* premium */
.premium-panel{
  display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(30px,5vw,80px);align-items:center;
  border:1px solid color-mix(in srgb,var(--accent) 36%,transparent);border-radius:24px;
  padding:clamp(32px,5vw,64px);
  background:
    radial-gradient(ellipse 70% 90% at 100% 0%,color-mix(in srgb,var(--accent) 9%,transparent),transparent 60%),
    var(--ink-2);
}
.premium-list{list-style:none;display:grid;gap:0;border-top:1px solid var(--hairline)}
.premium-list li{padding:16px 4px 16px 30px;border-bottom:1px solid var(--hairline);font-size:14px;position:relative}
.premium-list li::before{content:"";position:absolute;left:4px;top:50%;transform:translateY(-50%);width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
@media(max-width:880px){.premium-panel{grid-template-columns:1fr}}

/* safety */
.safety-box{border:1px solid var(--hairline);border-left:3px solid var(--accent);border-radius:14px;padding:26px 30px;max-width:860px}
.safety-box p{font-size:13px;color:var(--washi-dim);line-height:2.1}

/* pager（前後アプリ） */
.app-pager{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:stretch;
  border-top:1px solid var(--hairline);
}
.pager-link{
  --accent:var(--washi);
  display:flex;flex-direction:column;gap:6px;justify-content:center;
  padding:44px clamp(20px,5vw,72px);transition:background .4s;
}
.pager-link:hover{background:color-mix(in srgb,var(--accent) 8%,transparent)}
.pager-link small{font-family:var(--latin);font-style:italic;font-size:11.5px;letter-spacing:.3em;color:var(--washi-faint);text-transform:uppercase}
.pager-link span{font-family:var(--latin);font-weight:600;font-size:clamp(22px,2.6vw,34px)}
.pager-link span i{font-style:italic;font-weight:400;color:var(--accent)}
.pager-link.next{text-align:right;align-items:flex-end}
.pager-hub{
  display:grid;place-items:center;padding:0 clamp(18px,3vw,44px);
  border-left:1px solid var(--hairline);border-right:1px solid var(--hairline);
  font-family:var(--latin);font-style:italic;font-size:12px;letter-spacing:.3em;color:var(--washi-faint);
  transition:color .3s;
}
.pager-hub:hover{color:var(--washi)}
@media(max-width:680px){
  .app-pager{grid-template-columns:1fr}
  .pager-hub{border:0;border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);padding:18px 0}
  .pager-link.next{text-align:left;align-items:flex-start}
}

/* ---- motion ---- */
.reveal{opacity:0;transform:translateY(36px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.1s}.reveal[data-d="2"]{transition-delay:.2s}
.reveal[data-d="3"]{transition-delay:.3s}.reveal[data-d="4"]{transition-delay:.4s}
.boot{opacity:0;transform:translateY(28px);animation:boot 1.2s var(--ease) forwards}
.boot[data-b="1"]{animation-delay:.15s}.boot[data-b="2"]{animation-delay:.3s}
.boot[data-b="3"]{animation-delay:.45s}.boot[data-b="4"]{animation-delay:.6s}
@keyframes boot{to{opacity:1;transform:none}}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal,.boot{opacity:1;transform:none}
}