/* =========================================================
   Azurewind — corporate site
   Palette: azure blues / generous whitespace / Mincho + Gothic
   ========================================================= */

:root{
  --azure-900:#0a2e4d;
  --azure-800:#0a3d62;
  --azure-700:#12578f;
  --azure-600:#1b6ca8;
  --azure-500:#2e9bd6;
  --azure-300:#8ecae6;
  --azure-100:#dbeefb;

  --ink:#12202e;
  --ink-70:#425568;
  --ink-45:#7d8ea0;
  --line:#e3eaf1;

  --bg:#ffffff;
  --bg-tint:#f5f9fc;

  --font-gothic:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic Medium","Yu Gothic","YuGothic","Noto Sans JP","Meiryo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mincho:"Hiragino Mincho ProN","Yu Mincho","YuMincho","Noto Serif JP","Times New Roman",serif;

  --shell:1140px;
  --pad:clamp(20px,5vw,32px);
  --radius:14px;
  --shadow-sm:0 1px 2px rgba(18,32,46,.05),0 6px 20px rgba(18,32,46,.05);
  --shadow-md:0 10px 40px rgba(10,61,98,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px;}
body{
  margin:0;
  font-family:var(--font-gothic);
  font-size:16px;
  line-height:1.9;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"palt" 1;
  overflow-x:hidden;
}
img,svg{max-width:100%;}
a{color:var(--azure-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--azure-500);}
h1,h2,h3{margin:0;line-height:1.45;font-weight:600;letter-spacing:.01em;}
p{margin:0;}
ul,ol,dl,dd{margin:0;padding:0;}
li{list-style:none;}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--azure-800);color:#fff;padding:12px 20px;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;color:#fff;}
:focus-visible{outline:2px solid var(--azure-500);outline-offset:3px;border-radius:4px;}

.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--pad);}
.container.narrow{max-width:820px;}
.br-sp{display:none;}
.muted{color:var(--ink-45);font-size:.95rem;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  padding:16px 30px;border:1px solid transparent;border-radius:999px;
  font-size:.95rem;font-weight:600;letter-spacing:.04em;line-height:1;
  cursor:pointer;transition:all .28s var(--ease);white-space:nowrap;
}
.btn__arrow{transition:transform .28s var(--ease);}
.btn:hover .btn__arrow{transform:translateX(4px);}
.btn--primary{
  background:linear-gradient(120deg,var(--azure-700),var(--azure-500));
  color:#fff;box-shadow:0 8px 24px rgba(27,108,168,.30);
}
.btn--primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 30px rgba(27,108,168,.38);}
.btn--ghost{border-color:rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.06);}
.btn--ghost:hover{background:rgba(255,255,255,.16);color:#fff;}
.btn--ghost.btn--dark{border-color:var(--line);color:var(--azure-700);background:#fff;}
.btn--ghost.btn--dark:hover{background:var(--azure-100);color:var(--azure-800);}
.btn--sm{padding:12px 22px;font-size:.85rem;}
.btn--block{width:100%;}

/* =========================================================
   Header
   ========================================================= */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),backdrop-filter .35s var(--ease);
}
.site-header.is-stuck{background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(14px);box-shadow:0 1px 0 var(--line);}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:76px;}

.brand{display:flex;align-items:center;gap:12px;color:#fff;}
.brand__mark{width:38px;height:38px;flex:none;}
.brand__text{display:flex;flex-direction:column;line-height:1.25;}
.brand__name{font-family:var(--font-mincho);font-size:1.22rem;letter-spacing:.06em;font-weight:600;}
.brand__sub{font-size:.66rem;letter-spacing:.12em;opacity:.75;}
.site-header.is-stuck .brand{color:var(--ink);}

.nav{display:flex;align-items:center;gap:30px;}
.nav > a{color:#fff;font-size:.92rem;letter-spacing:.05em;position:relative;padding-block:6px;}
.nav > a:not(.nav__cta)::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:currentColor;
  transition:width .3s var(--ease);
}
.nav > a:not(.nav__cta):hover::after{width:100%;}
.site-header.is-stuck .nav > a{color:var(--ink);}
.site-header.is-stuck .nav > a:hover{color:var(--azure-600);}
.nav__cta{color:#fff !important;}

.nav-toggle{display:none;width:44px;height:44px;border:0;background:transparent;cursor:pointer;padding:0;}
.nav-toggle__bars{display:block;position:relative;width:24px;height:16px;margin-inline:auto;}
.nav-toggle__bars i{position:absolute;left:0;height:2px;width:100%;background:#fff;border-radius:2px;transition:transform .3s var(--ease),opacity .2s var(--ease);}
.nav-toggle__bars i:nth-child(1){top:0;}
.nav-toggle__bars i:nth-child(2){top:7px;}
.nav-toggle__bars i:nth-child(3){top:14px;}
.site-header.is-stuck .nav-toggle__bars i,
.site-header.is-open .nav-toggle__bars i{background:var(--ink);}
.nav-toggle[aria-expanded="true"] i:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] i:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  position:relative;min-height:min(92svh,860px);
  display:flex;align-items:center;
  padding:150px 0 110px;
  background:linear-gradient(150deg,#061f36 0%,var(--azure-800) 38%,var(--azure-600) 72%,var(--azure-500) 100%);
  color:#fff;overflow:hidden;isolation:isolate;
}
.hero__bg{position:absolute;inset:0;z-index:-1;}
.hero__bg::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(120% 90% at 78% 18%,rgba(142,202,230,.30),transparent 58%);
}
.hero__wind{position:absolute;inset:0;width:100%;height:100%;}
.wind{stroke-dasharray:520 1400;opacity:.85;animation:windFlow 18s linear infinite;}
.wind--1{animation-duration:19s;animation-delay:-2s;}
.wind--2{animation-duration:15s;animation-delay:-7s;}
.wind--3{animation-duration:23s;animation-delay:-4s;}
.wind--4{animation-duration:17s;animation-delay:-11s;}
.wind--5{animation-duration:26s;animation-delay:-9s;}
@keyframes windFlow{
  0%{stroke-dashoffset:1900;opacity:0;}
  12%{opacity:.9;}
  85%{opacity:.9;}
  100%{stroke-dashoffset:-400;opacity:0;}
}
@media (prefers-reduced-motion:reduce){.wind{animation:none;stroke-dasharray:none;opacity:.5;}}

.hero__inner{position:relative;}
.hero__eyebrow{
  font-family:var(--font-mincho);font-size:clamp(.85rem,2vw,1rem);
  letter-spacing:.32em;text-transform:uppercase;color:var(--azure-300);
  margin-bottom:28px;
  animation:fadeUp .9s var(--ease) both;
}
.hero__title{
  font-family:var(--font-mincho);
  /* sized for the two 14-character lines of the headline */
  font-size:clamp(1.5rem,4.6vw,3.05rem);
  line-height:1.5;letter-spacing:.03em;font-weight:600;
  margin-bottom:30px;
}
.hero__title span{display:block;animation:fadeUp 1s var(--ease) both;}
.hero__title span:nth-child(1){animation-delay:.1s;}
.hero__title span:nth-child(2){animation-delay:.24s;}
.hero__lead{
  font-size:clamp(.95rem,2.2vw,1.06rem);line-height:2.1;color:rgba(255,255,255,.86);
  max-width:36em;margin-bottom:44px;animation:fadeUp 1s var(--ease) .38s both;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;animation:fadeUp 1s var(--ease) .5s both;}
@keyframes fadeUp{from{opacity:0;transform:translateY(22px);}to{opacity:1;transform:none;}}
@media (prefers-reduced-motion:reduce){
  .hero__eyebrow,.hero__title span,.hero__lead,.hero__actions{animation:none;}
}

.hero__scroll{position:absolute;left:50%;bottom:34px;translate:-50% 0;width:1px;height:52px;background:rgba(255,255,255,.25);overflow:hidden;}
.hero__scroll span{position:absolute;inset:0;background:#fff;animation:scrollLine 2.4s var(--ease) infinite;}
@keyframes scrollLine{0%{transform:translateY(-100%);}60%,100%{transform:translateY(100%);}}

/* =========================================================
   Sections
   ========================================================= */
.section{padding:clamp(72px,11vw,132px) 0;}
.section--tint{background:var(--bg-tint);}
.section--intro{padding-block:clamp(64px,9vw,104px);}
.section__head{margin-bottom:clamp(40px,6vw,64px);max-width:44em;}
.section__head--center{text-align:center;margin-inline:auto;}
.section__label{
  font-family:var(--font-mincho);font-size:.82rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--azure-600);margin-bottom:14px;
}
.section__label--light{color:var(--azure-300);}
.section__title{font-family:var(--font-mincho);font-size:clamp(1.6rem,3.6vw,2.4rem);letter-spacing:.05em;}
.section__title--light{color:#fff;}
.section__desc{margin-top:18px;color:var(--ink-70);}

.lead-lg{font-size:clamp(1.02rem,2.4vw,1.2rem);line-height:2.15;margin-bottom:22px;}
.lead-lg strong{color:var(--azure-700);font-weight:600;}

/* ---------- service cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:44px 32px 40px;box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s var(--ease);
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--azure-700),var(--azure-500));
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:var(--azure-100);}
.card:hover::before{transform:scaleX(1);}
.card__num{
  position:absolute;top:24px;right:28px;
  font-family:var(--font-mincho);font-size:2.6rem;line-height:1;color:var(--azure-100);letter-spacing:.02em;
}
.card__icon{width:46px;height:46px;color:var(--azure-600);margin-bottom:24px;}
.card__title{font-family:var(--font-mincho);font-size:1.24rem;letter-spacing:.05em;margin-bottom:14px;}
.card__text{font-size:.93rem;line-height:2.05;color:var(--ink-70);}

/* ---------- AI practice ----------
   Deliberately not the 3-card grid used by Service: a sticky statement column
   beside a hairline-separated list, so the two sections read as different
   kinds of content rather than the same block repeated. */
.section--ai{
  background:
    radial-gradient(80% 55% at 88% 0%,rgba(142,202,230,.16),transparent 62%),
    var(--bg);
}
.ai__grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.25fr);gap:clamp(40px,6vw,84px);align-items:start;}
.ai__intro{position:sticky;top:118px;}
.ai__intro .section__title{margin-bottom:24px;}
.ai__text{font-size:.97rem;line-height:2.1;color:var(--ink-70);margin-bottom:30px;}

.ai__items{display:grid;}
.ai-item{padding:34px 0;border-top:1px solid var(--line);}
.ai-item:first-child{padding-top:0;border-top:0;}
.ai-item:last-child{padding-bottom:0;}
.ai-item__tag{
  display:inline-flex;align-items:center;gap:.5em;
  font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--azure-600);margin-bottom:14px;
}
.ai-item__tag::before{
  content:"";width:26px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--azure-700),var(--azure-500));
}
.ai-item__title{font-family:var(--font-mincho);font-size:1.3rem;letter-spacing:.05em;margin-bottom:14px;}
.ai-item__text{font-size:.93rem;line-height:2.05;color:var(--ink-70);margin-bottom:20px;}

.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chips li{
  font-size:.78rem;letter-spacing:.03em;line-height:1;
  padding:9px 14px;border-radius:999px;
  background:var(--azure-100);color:var(--azure-800);
}

/* ---------- philosophy ---------- */
.section--dark{
  background:linear-gradient(140deg,var(--azure-900),var(--azure-700));
  color:#fff;position:relative;overflow:hidden;
}
.section--dark::after{
  content:"";position:absolute;inset:auto -10% -40% auto;width:60vw;height:60vw;
  background:radial-gradient(circle,rgba(142,202,230,.16),transparent 62%);pointer-events:none;
}
.philosophy{display:grid;gap:18px;max-width:820px;margin-inline:auto;position:relative;}
.philosophy li{
  display:flex;gap:16px;align-items:flex-start;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius);padding:24px 28px;
  font-size:clamp(.98rem,2.2vw,1.08rem);line-height:1.9;
  backdrop-filter:blur(6px);
}
.philosophy__mark{color:var(--azure-300);flex:none;font-size:1.05em;line-height:1.75;}

/* ---------- company ---------- */
.company{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:clamp(32px,5vw,64px);align-items:start;}
.spec{border-top:1px solid var(--line);}
.spec__row{display:grid;grid-template-columns:112px 1fr;gap:20px;padding:20px 4px;border-bottom:1px solid var(--line);}
.spec dt{font-size:.86rem;letter-spacing:.08em;color:var(--azure-700);font-weight:600;padding-top:.15em;}
.spec dd{font-size:.96rem;line-height:1.85;}

.biz__title{
  font-family:var(--font-mincho);font-size:1.14rem;letter-spacing:.08em;
  padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.biz__list{counter-reset:biz;}
.biz__list li{
  counter-increment:biz;position:relative;padding:14px 0 14px 44px;
  font-size:.9rem;line-height:1.95;color:var(--ink-70);border-bottom:1px dashed var(--line);
}
.biz__list li::before{
  content:"(" counter(biz) ")";position:absolute;left:0;top:14px;
  font-family:var(--font-mincho);color:var(--azure-500);font-size:.9rem;letter-spacing:.02em;
}

/* ---------- contact ---------- */
.contact{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);gap:clamp(28px,4vw,52px);align-items:start;}
.form{
  display:grid;grid-template-columns:1fr 1fr;gap:20px 22px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(26px,4vw,42px);box-shadow:var(--shadow-sm);
}
.field{display:flex;flex-direction:column;gap:9px;}
.field--full{grid-column:1/-1;}
/* honeypot: off-screen rather than display:none, so bots that skip
   hidden inputs still fill it in */
.field--hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden;}
.field label{font-size:.85rem;font-weight:600;letter-spacing:.06em;color:var(--ink);}
.req{
  display:inline-block;margin-left:6px;padding:2px 8px;border-radius:4px;
  background:var(--azure-100);color:var(--azure-800);font-size:.68rem;font-weight:600;letter-spacing:.08em;vertical-align:1px;
}
.field input,.field select,.field textarea{
  font:inherit;font-size:.94rem;color:var(--ink);
  padding:13px 15px;border:1px solid var(--line);border-radius:9px;background:#fcfdfe;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
  width:100%;
}
.field textarea{resize:vertical;line-height:1.85;}
.field input::placeholder,.field textarea::placeholder{color:#b3c1cf;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--azure-500);box-shadow:0 0 0 3px rgba(46,155,214,.16);
}
.field.has-error input,.field.has-error textarea{border-color:#d9534f;box-shadow:0 0 0 3px rgba(217,83,79,.12);}
.field .error-msg{font-size:.78rem;color:#c9403c;}
.form__foot{gap:16px;margin-top:4px;}
.form__note{font-size:.8rem;color:var(--ink-45);line-height:1.8;}
.form__status{grid-column:1/-1;margin:0;font-size:.88rem;line-height:1.8;}
.form__status.is-ok{color:#1a7f4b;}
.form__status.is-ng{color:#c9403c;}

.access{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(26px,4vw,36px);box-shadow:var(--shadow-sm);}
.access__title{font-family:var(--font-mincho);font-size:1.1rem;letter-spacing:.08em;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid var(--line);}
.access__list{display:grid;gap:18px;margin-bottom:26px;}
.access__list dt{font-size:.78rem;letter-spacing:.1em;color:var(--azure-700);font-weight:600;margin-bottom:5px;}
.access__list dd{font-size:.93rem;line-height:1.85;}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{background:var(--azure-900);color:rgba(255,255,255,.72);padding:56px 0 40px;}
.footer__inner{display:grid;grid-template-columns:1fr auto;gap:26px 40px;align-items:center;}
.footer__brand .brand__name{color:#fff;display:block;}
.footer__tag{font-family:var(--font-mincho);font-size:.78rem;letter-spacing:.2em;color:var(--azure-300);margin-top:6px;}
.footer__nav{display:flex;gap:26px;flex-wrap:wrap;}
.footer__nav a{color:rgba(255,255,255,.78);font-size:.88rem;}
.footer__nav a:hover{color:#fff;}
.footer__copy{grid-column:1/-1;padding-top:26px;border-top:1px solid rgba(255,255,255,.12);font-size:.78rem;letter-spacing:.06em;color:rgba(255,255,255,.55);}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width:960px){
  .cards{grid-template-columns:1fr;}
  .ai__grid{grid-template-columns:1fr;}
  .ai__intro{position:static;}
  .company{grid-template-columns:1fr;}
  .contact{grid-template-columns:1fr;}
  .card__num{font-size:2.2rem;}
}
@media (max-width:768px){
  html{scroll-padding-top:70px;}
  .br-sp{display:inline;}
  .header__inner{height:66px;}
  .nav-toggle{display:block;z-index:2;}
  .nav{
    position:fixed;inset:0;z-index:1;flex-direction:column;justify-content:center;gap:8px;
    background:#fff;padding:80px var(--pad) 40px;
    clip-path:circle(0% at calc(100% - 44px) 40px);
    transition:clip-path .5s var(--ease);
    pointer-events:none;
  }
  .site-header.is-open .nav{clip-path:circle(150% at calc(100% - 44px) 40px);pointer-events:auto;}
  /* backdrop-filter makes the header a containing block for position:fixed
     children, which would trap the full-screen menu inside the header box. */
  .site-header.is-open{background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;box-shadow:none;}
  .site-header.is-open .brand{position:relative;z-index:2;color:var(--ink);}
  .nav > a{color:var(--ink) !important;font-family:var(--font-mincho);font-size:1.25rem;letter-spacing:.1em;padding:16px 0;text-align:center;width:100%;}
  .nav > .nav__cta{color:#fff !important;font-family:var(--font-gothic) !important;font-size:.95rem !important;margin-top:18px;width:auto !important;padding:15px 34px !important;}
  .hero{padding:120px 0 96px;min-height:auto;}
  .hero__lead br{display:none;}
  .form{grid-template-columns:1fr;}
  .spec__row{grid-template-columns:88px 1fr;gap:14px;}
  .footer__inner{grid-template-columns:1fr;align-items:start;}
}
@media (max-width:420px){
  .brand__sub{display:none;}
  .btn{padding:15px 24px;}
}