/* main.css — I-techpros: glossy premium auto-detailing studio
   DARK-first identity, electric-blue accent, zigzag service rows,
   asymmetric hero + mosaic gallery. Theme via CSS variables. */

/* ---------- palette ---------- */
:root{
  /* LIGHT */
  --bg:#f4f6f9; --bg-alt:#eef1f6; --surface:#ffffff; --surface-2:#f7f9fc;
  --text:#0d1b2a; --muted:#51607a; --border:#dde3ec;
  --header:rgba(244,246,249,.72);
  --accent:#2563eb; --accent-2:#60a5fa; --accent-contrast:#ffffff;
  --glow:rgba(37,99,235,.28);
  --shadow:0 18px 50px -18px rgba(13,27,42,.28);
  --maxw:1240px; --radius:18px; --radius-sm:12px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --grid-line:rgba(13,27,42,.05);
}
[data-theme="dark"]{
  --bg:#0b0f14; --bg-alt:#0e141b; --surface:#121a24; --surface-2:#0f1620;
  --text:#e8eef5; --muted:#91a0b4; --border:#223043;
  --header:rgba(11,15,20,.62);
  --accent:#3b82f6; --accent-2:#60a5fa; --accent-contrast:#ffffff;
  --glow:rgba(59,130,246,.45);
  --shadow:0 24px 60px -20px rgba(0,0,0,.7);
  --grid-line:rgba(255,255,255,.04);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",
    -apple-system,"Segoe UI",system-ui,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  -webkit-font-smoothing:antialiased;
  transition:background .4s var(--ease),color .4s var(--ease);
  overflow-x:hidden;
}
/* faint blueprint grid behind everything for the garage mood */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:46px 46px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.container{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.section{padding:96px 0;position:relative}
.section--alt{background:
  linear-gradient(180deg,transparent,var(--bg-alt) 12%,var(--bg-alt) 88%,transparent)}

.section__head{max-width:760px;margin:0 0 56px}
.section__title{
  font-size:clamp(1.8rem,4vw,2.9rem);font-weight:800;letter-spacing:-.02em;
  line-height:1.1;margin-bottom:16px;
}
.section__title::before{
  content:"";display:block;width:54px;height:4px;border-radius:4px;
  margin-bottom:18px;background:linear-gradient(90deg,var(--accent),transparent);
}
.section__lead{color:var(--muted);font-size:1.05rem;max-width:560px}
.accent{color:var(--accent)}

/* shared eyebrow look */
.hero__eyebrow,.section__head>.section__lead+*{}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:50;background:var(--header);
  backdrop-filter:saturate(160%) blur(18px);
  -webkit-backdrop-filter:saturate(160%) blur(18px);
  border-bottom:1px solid var(--border);
}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.02em;font-size:1.05rem}
.logo__mark{
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--accent),#1e40af);
  display:grid;place-items:center;color:#fff;font-size:.85rem;font-weight:800;
  box-shadow:0 0 0 1px var(--border),0 8px 22px -6px var(--glow);
}
.nav{display:flex;align-items:center;gap:8px}
.nav__list{display:flex;gap:2px;list-style:none}
.nav__link{
  position:relative;padding:9px 15px;border-radius:10px;font-size:.95rem;font-weight:600;
  color:var(--muted);transition:color .25s var(--ease),background .25s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:15px;right:15px;bottom:5px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);border-radius:2px;
}
.nav__link:hover{color:var(--text)}
.nav__link:hover::after,.nav__link--active::after{transform:scaleX(1)}
.nav__link--active{color:var(--text)}

.tools{display:flex;align-items:center;gap:8px;margin-left:10px}
.toggle{
  border:1px solid var(--border);background:var(--surface);color:var(--text);
  height:40px;padding:0 14px;border-radius:11px;cursor:pointer;font-size:.82rem;font-weight:600;
  display:inline-flex;align-items:center;gap:6px;
  transition:border-color .25s,color .25s,transform .15s,box-shadow .25s;
}
.toggle:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);
  box-shadow:0 8px 22px -10px var(--glow)}
.burger{display:none;flex-direction:column;gap:6px;background:none;border:0;cursor:pointer;padding:9px}
.burger__bar{width:26px;height:2px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}

/* ---------- hero (asymmetric, text pinned left) ---------- */
.hero{
  position:relative;min-height:88vh;display:grid;align-items:center;
  color:#fff;overflow:hidden;border-bottom:1px solid var(--border);
}
.hero__bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  transform:scale(1.08);will-change:transform;filter:saturate(1.05);
}
.hero__overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 8% 50%,rgba(11,15,20,.92) 0%,rgba(11,15,20,.55) 45%,rgba(11,15,20,.15) 75%),
    linear-gradient(180deg,rgba(11,15,20,.5),rgba(11,15,20,.35));
}
/* electric blue accent sweep on the left edge */
.hero__overlay::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:42%;
  background:linear-gradient(90deg,var(--glow),transparent);
  mix-blend-mode:screen;opacity:.7;
}
.hero__inner{
  position:relative;max-width:680px;margin:0;
  padding-right:24px;text-align:left;
}
.hero__eyebrow{
  display:inline-block;letter-spacing:.28em;text-transform:uppercase;
  font-size:.72rem;font-weight:700;color:#dbe6ff;
  background:rgba(59,130,246,.16);border:1px solid rgba(96,165,250,.35);
  padding:8px 16px;border-radius:999px;margin-bottom:26px;
}
.hero__title{
  font-size:clamp(2.6rem,7vw,5.2rem);line-height:1.02;letter-spacing:-.03em;
  font-weight:800;margin-bottom:22px;text-wrap:balance;
}
.hero__subtitle{font-size:clamp(1rem,2vw,1.22rem);color:#cdd7e6;max-width:520px}
.hero__cta{margin-top:36px;display:flex;gap:16px;flex-wrap:wrap}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:15px 30px;border-radius:12px;
  font-weight:700;letter-spacing:.01em;cursor:pointer;border:1px solid transparent;
  transition:.25s var(--ease);
}
.btn--primary{
  background:linear-gradient(135deg,var(--accent),#1d4ed8);color:#fff;
  box-shadow:0 12px 30px -10px var(--glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px var(--glow)}
.btn--ghost{border-color:rgba(255,255,255,.4);color:#fff;backdrop-filter:blur(4px)}
.btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- about ---------- */
.about__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.about__title{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:800;letter-spacing:-.02em;
  line-height:1.12;margin-bottom:22px}
.about__title::before{
  content:"";display:block;width:54px;height:4px;border-radius:4px;margin-bottom:18px;
  background:linear-gradient(90deg,var(--accent),transparent);
}
.about__text{color:var(--muted);margin-bottom:16px}
.about__img{
  border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:4/3;
  object-fit:cover;width:100%;border:1px solid var(--border);
}

/* ---------- services: alternating zigzag rows ---------- */
.cards{display:flex;flex-direction:column;gap:36px}
.card{
  display:grid;grid-template-columns:1fr 1fr;align-items:stretch;
  background:var(--surface);border:1px solid var(--border);
  border-radius:calc(var(--radius) + 6px);overflow:hidden;
  backdrop-filter:blur(8px);
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;
}
.card:hover{transform:translateY(-4px);border-color:var(--accent);
  box-shadow:0 30px 70px -28px var(--glow)}
.card__img{
  width:100%;height:100%;min-height:300px;object-fit:cover;
  transition:transform .6s var(--ease),filter .35s;
}
.card:hover .card__img{transform:scale(1.05)}
.card__body{
  padding:clamp(28px,4vw,56px);display:flex;flex-direction:column;justify-content:center;
  position:relative;
}
/* numbered eyebrow vibe via accent bar */
.card__body::before{
  content:"";position:absolute;left:0;top:clamp(28px,4vw,56px);width:4px;height:34px;
  border-radius:4px;background:var(--accent);box-shadow:0 0 16px var(--glow);
}
.card__title{font-size:clamp(1.3rem,2.4vw,1.85rem);font-weight:800;letter-spacing:-.01em;margin-bottom:12px}
.card__text{color:var(--muted);font-size:1.02rem}
/* zigzag: even rows flip the image to the other side */
.card:nth-child(even){grid-template-columns:1fr 1fr}
.card:nth-child(even) .card__img{order:2}
.card:nth-child(even) .card__body{order:1}
.card:nth-child(even) .card__body::before{left:auto;right:0}
.card:nth-child(even) .card__body{padding-left:clamp(28px,4vw,56px)}

/* ---------- gallery: asymmetric mosaic ---------- */
.gallery{
  display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:200px;
  grid-auto-flow:dense;gap:16px;
}
.gallery__item{overflow:hidden;border-radius:var(--radius);position:relative;
  border:1px solid var(--border);background:var(--surface)}
.gallery__item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(11,15,20,.45));
  opacity:0;transition:opacity .4s var(--ease);
}
.gallery__item:hover::after{opacity:1}
.gallery__img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.gallery__item:hover .gallery__img{transform:scale(1.1)}
/* mosaic spans — make some tiles bigger */
.gallery__item:nth-child(1){grid-column:span 2;grid-row:span 2}
.gallery__item:nth-child(6){grid-column:span 2}
.gallery__item:nth-child(8){grid-row:span 2}
.gallery__item:nth-child(4){grid-column:span 2}

/* ---------- timeline ---------- */
.timeline{max-width:780px;margin:0;position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--accent),var(--border))}
.timeline__item{position:relative;padding:0 0 36px 28px}
.timeline__item::before{content:"";position:absolute;left:-3px;top:6px;width:15px;height:15px;
  border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--bg),0 0 16px var(--glow)}
.timeline__year{font-weight:800;color:var(--accent)}
.timeline__text{color:var(--muted)}

/* ---------- contact / form ---------- */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.field{margin-bottom:20px}
.field__label{display:block;font-size:.88rem;font-weight:600;margin-bottom:8px;color:var(--muted);
  letter-spacing:.02em}
.field__input,.field__area{
  width:100%;padding:14px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);
  background:var(--surface-2);color:var(--text);font:inherit;transition:border-color .25s,box-shadow .25s;
}
.field__input:focus,.field__area:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--glow);
}
.field__area{min-height:150px;resize:vertical}
.info__row{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--border)}
.info__label{min-width:96px;color:var(--muted);font-weight:600}
.form__note{font-size:.85rem;color:var(--muted);margin-top:12px}
.form__status{margin-top:16px;font-weight:700;color:var(--accent);min-height:1.2em}

/* ---------- legal ---------- */
.legal{max-width:840px;margin:0 auto}
.legal h2{margin:34px 0 12px;font-size:1.3rem;font-weight:800;letter-spacing:-.01em}
.legal p,.legal li{color:var(--muted);margin-bottom:10px}
.legal ul{padding-left:24px}

/* ---------- footer ---------- */
.footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:72px 0 32px;position:relative}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:.6}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer__title{font-weight:800;margin-bottom:16px;letter-spacing:.01em}
.footer__text{color:var(--muted);font-size:.92rem;max-width:320px}
.footer__list{list-style:none;display:grid;gap:10px}
.footer__link{color:var(--muted);font-size:.92rem;transition:color .2s}
.footer__link:hover{color:var(--accent)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;
  gap:14px;margin-top:48px;padding-top:24px;border-top:1px solid var(--border);
  color:var(--muted);font-size:.86rem}
.footer__tools{display:flex;gap:8px}

/* ---------- cookie banner ---------- */
.cookie{
  position:fixed;left:18px;right:18px;bottom:18px;z-index:80;max-width:580px;margin:0 auto;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 24px;backdrop-filter:blur(12px);
  transform:translateY(160%);transition:transform .55s var(--ease);
}
.cookie--show{transform:translateY(0)}
.cookie__text{font-size:.9rem;color:var(--muted);margin-bottom:16px}
.cookie__actions{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(30px);
  transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .gallery{grid-template-columns:repeat(3,1fr)}
  .gallery__item:nth-child(6),.gallery__item:nth-child(4){grid-column:span 1}
}
@media(max-width:900px){
  .about__grid,.contact{grid-template-columns:1fr;gap:36px}
  .footer__grid{grid-template-columns:1fr 1fr}
  /* zigzag rows stack: image always on top */
  .card,.card:nth-child(even){grid-template-columns:1fr}
  .card__img,.card:nth-child(even) .card__img{order:0;min-height:240px}
  .card__body,.card:nth-child(even) .card__body{order:0}
  .card:nth-child(even) .card__body::before{left:0;right:auto}
}
@media(max-width:760px){
  .nav__list{
    position:fixed;inset:74px 0 auto 0;flex-direction:column;background:var(--bg);
    border-bottom:1px solid var(--border);padding:16px 24px;gap:6px;
    transform:translateY(-140%);transition:transform .38s var(--ease);box-shadow:var(--shadow);
  }
  .nav--open .nav__list{transform:translateY(0)}
  .nav__link{padding:12px 14px}
  .nav__link::after{display:none}
  .nav__link--active,.nav__link:hover{background:var(--bg-alt);color:var(--accent)}
  .burger{display:flex}
  .nav--open .burger__bar:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav--open .burger__bar:nth-child(2){opacity:0}
  .nav--open .burger__bar:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:150px}
  .gallery__item:nth-child(1){grid-column:span 2;grid-row:span 2}
  .gallery__item:nth-child(8){grid-row:span 1}
  .footer__grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .hero{min-height:78vh}
}
@media(max-width:460px){
  .gallery{grid-template-columns:1fr 1fr}
  .container{padding:0 20px}
}