/* =========================================================
   Зөв Дизель Сервис ХХК — Landing page
   Сэдэв: CAT шар/хар аж үйлдвэрийн hazard-stripe хэв маяг
   ========================================================= */

:root{
  --yellow:#FFC800;
  --yellow-deep:#E5AE00;
  --ink:#141414;
  --steel:#1C2026;
  --steel-2:#262B33;
  --orange:#F26522;
  --green:#5BA829;
  --line:#E4E5E8;
  --soft:#F4F5F7;
  --white:#FFFFFF;
  --muted:#6B7077;

  --maxw:1180px;
  --r:14px;
  --shadow:0 10px 30px rgba(20,20,20,.10);
  --ease:cubic-bezier(.2,.7,.2,1);

  --font-display:'Oswald', system-ui, sans-serif;
  --font-body:'Inter', system-ui, sans-serif;
  --font-mono:'JetBrains Mono', ui-monospace, monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:24px}

/* ---------- Hazard stripe signature ---------- */
.hazard{
  height:10px;
  background:repeating-linear-gradient(135deg,
    var(--ink) 0 18px, var(--yellow) 18px 36px);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4em;
  font-family:var(--font-display);font-weight:600;text-transform:uppercase;
  letter-spacing:.04em;font-size:.95rem;
  padding:.7em 1.3em;border-radius:8px;border:2px solid transparent;
  cursor:pointer;transition:transform .15s var(--ease), background .2s, color .2s, box-shadow .2s;
}
.btn--solid{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}
.btn--solid:hover{background:var(--ink);color:var(--yellow);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--white);border-color:rgba(255,255,255,.5)}
.btn--ghost:hover{border-color:var(--yellow);color:var(--yellow);transform:translateY(-2px)}
.btn--ink{background:var(--ink);color:var(--yellow)}
.btn--ink:hover{background:var(--white);color:var(--ink);transform:translateY(-2px)}
.btn--lg{font-size:1.02rem;padding:.85em 1.6em}
.btn--block{width:100%}
.btn:focus-visible{outline:3px solid var(--orange);outline-offset:3px}

/* ---------- Navbar ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{display:grid;place-items:center}
.brand__text{display:flex;flex-direction:column;line-height:1;font-family:var(--font-display)}
.brand__text strong{font-size:1.1rem;letter-spacing:.02em}
.brand__text small{font-size:.72rem;color:var(--muted);letter-spacing:.18em;font-weight:500}
.nav__links{display:flex;align-items:center;gap:26px}
.nav__links a{font-family:var(--font-display);font-weight:500;font-size:.96rem;color:var(--ink);transition:color .2s}
.nav__links a:not(.btn):hover{color:var(--orange)}
.nav__cta{font-size:.82rem;padding:.6em 1em}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:26px;height:3px;background:var(--ink);border-radius:2px;transition:.25s}

/* ---------- Eyebrow / section headers ---------- */
.eyebrow{
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.12em;
  color:var(--yellow);margin-bottom:14px;font-weight:500;
}
.eyebrow--dark{color:var(--orange)}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-title{
  font-family:var(--font-display);font-weight:700;line-height:1.04;
  font-size:clamp(2rem,4.6vw,3.2rem);text-transform:uppercase;letter-spacing:.005em;
}
.sec-title--light{color:var(--white)}
.sec-sub{margin-top:14px;color:var(--muted);font-size:1.05rem;max-width:560px}
.section--dark .sec-sub{color:#AEB4BC}
.section{padding:84px 0}
.section--soft{background:var(--soft)}
.section--dark{background:var(--steel);color:var(--white)}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;background:var(--steel);color:var(--white);overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 500px at 78% -10%, rgba(255,200,0,.16), transparent 60%),
    linear-gradient(180deg,var(--steel),var(--steel-2));
}
.hero__inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding:64px 24px 56px}
.hero__title{
  font-family:var(--font-display);font-weight:700;text-transform:uppercase;
  font-size:clamp(2.6rem,6vw,4.6rem);line-height:.98;letter-spacing:.005em;margin:6px 0 18px;
}
.hero__title .hl{color:var(--yellow)}
.hero__lead{font-size:1.12rem;color:#C9CDD3;max-width:480px;display:flex;flex-direction:column;gap:8px}
.since{font-family:var(--font-mono);font-size:.82rem;color:var(--yellow);letter-spacing:.08em}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin:26px 0 28px}
.chips li{
  font-family:var(--font-display);font-weight:500;font-size:.9rem;
  padding:.42em .9em;border:1px solid rgba(255,255,255,.22);border-radius:999px;
  background:rgba(255,255,255,.04);
}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px}

.hero__visual{display:grid;place-items:center}
.machine-ph{
  position:relative;width:100%;max-width:380px;aspect-ratio:4/3;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 14px,transparent 14px 28px),
             rgba(255,255,255,.04);
  border:1px dashed rgba(255,255,255,.25);border-radius:var(--r);
  display:grid;place-items:center;padding:24px;
}
.machine-ph__tag{
  position:absolute;bottom:10px;right:12px;
  font-family:var(--font-mono);font-size:.68rem;color:rgba(255,255,255,.5);letter-spacing:.05em;
}

/* Slogan band */
.slogan{position:relative;background:var(--yellow);color:var(--ink)}
.slogan p{
  font-family:var(--font-display);font-weight:700;text-transform:uppercase;
  font-size:clamp(1.1rem,2.6vw,1.8rem);letter-spacing:.01em;
  padding:22px 0;line-height:1.15;
}
.slogan span{color:var(--white);-webkit-text-stroke:1.5px var(--ink);
  text-shadow:2px 2px 0 var(--ink)}

/* =========================================================
   WHY US
   ========================================================= */
.why__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat{
  border:1px solid var(--line);border-radius:var(--r);padding:28px 24px;
  background:var(--white);transition:transform .2s var(--ease), box-shadow .2s, border-color .2s;
  position:relative;overflow:hidden;
}
.feat::after{content:"";position:absolute;left:0;top:0;width:6px;height:0;background:var(--yellow);transition:height .25s var(--ease)}
.feat:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.feat:hover::after{height:100%}
.feat--wide{grid-column:span 2}
.feat__num{font-family:var(--font-display);font-weight:700;font-size:3.4rem;line-height:1;color:var(--ink)}
.feat__num span{color:var(--orange)}
.feat__icon{
  display:inline-grid;place-items:center;min-width:60px;height:48px;padding:0 10px;
  background:var(--ink);color:var(--yellow);border-radius:8px;
  font-family:var(--font-display);font-weight:700;font-size:1.3rem;margin-bottom:6px;
}
.feat__icon--pin{background:var(--orange);color:var(--white)}
.feat__icon--green{background:var(--green);color:var(--white);font-size:1.05rem}
.feat h3{font-family:var(--font-display);font-weight:600;font-size:1.32rem;margin:12px 0 8px;text-transform:uppercase;letter-spacing:.01em}
.feat p{color:var(--muted)}
.flow{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;counter-reset:step}
.flow li{
  font-family:var(--font-mono);font-size:.86rem;background:var(--soft);
  padding:.5em .8em;border-radius:8px;counter-increment:step;display:flex;align-items:center;gap:.5em;
}
.flow li::before{content:counter(step,decimal-leading-zero);color:var(--orange);font-weight:700}

/* =========================================================
   SERVICES
   ========================================================= */
.svc__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc{
  background:var(--steel-2);border-radius:var(--r);overflow:hidden;
  border:1px solid rgba(255,255,255,.07);
  transition:transform .2s var(--ease), box-shadow .25s;
  display:flex;flex-direction:column;
}
.svc:hover{transform:translateY(-5px);box-shadow:0 18px 40px rgba(0,0,0,.45)}
.svc--feature{grid-column:span 1}
.svc__media{
  position:relative;aspect-ratio:16/10;
  background:repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 14px,transparent 14px 28px),
             linear-gradient(135deg,#2E343D,#20242B);
  display:grid;place-items:center;border-bottom:3px solid var(--yellow);
}
.svc--feature .svc__media{border-bottom-color:var(--orange)}
.codes{
  font-family:var(--font-mono);font-weight:700;color:var(--yellow);
  font-size:1.15rem;letter-spacing:.06em;
  border:1px solid rgba(255,200,0,.4);padding:.4em .8em;border-radius:8px;
}
.svc__body{padding:20px 22px 24px}
.svc__body h3{font-family:var(--font-display);font-weight:600;font-size:1.24rem;text-transform:uppercase;color:var(--white);margin-bottom:12px}
.svc__body h3 small{font-family:var(--font-mono);font-size:.62rem;color:#9aa0a8;letter-spacing:.06em;display:block;text-transform:none;margin-top:2px}
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tags li{
  font-size:.82rem;color:#D7DBE0;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);padding:.34em .72em;border-radius:999px;
}

/* =========================================================
   WORKS / GALLERY
   ========================================================= */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gal-item{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:var(--white)}
.gal-item:nth-child(1),.gal-item:nth-child(2){grid-column:span 2}
.gal-ph{
  aspect-ratio:16/10;display:grid;place-items:center;
  background:repeating-linear-gradient(45deg,#EDEEF1 0 16px,#F6F7F8 16px 32px);
  position:relative;transition:transform .3s var(--ease);
}
.gal-ph span{font-family:var(--font-mono);font-size:.8rem;color:var(--muted);letter-spacing:.1em}
.gal-item:hover .gal-ph{transform:scale(1.05)}
.gal-item figcaption{
  font-family:var(--font-display);font-weight:500;font-size:.92rem;
  padding:12px 14px;border-top:3px solid var(--yellow);
}

/* =========================================================
   CLIENTS
   ========================================================= */
.logo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.logo-ph{
  display:grid;place-items:center;text-align:center;
  min-height:100px;padding:14px;border-radius:12px;background:var(--white);
  border:1px solid var(--line);
  font-family:var(--font-display);font-weight:600;font-size:.96rem;
  color:var(--muted);filter:grayscale(1);opacity:.78;
  transition:.25s var(--ease);
}
.logo-ph:hover{filter:none;opacity:1;color:var(--ink);transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--yellow)}

/* =========================================================
   CONTACT
   ========================================================= */
.contact{position:relative;background:var(--yellow);color:var(--ink)}
.contact__inner{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:72px 24px 56px}
.contact__title{font-family:var(--font-display);font-weight:700;text-transform:uppercase;font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.02}
.contact__lead{margin:14px 0 26px;font-size:1.08rem;max-width:420px}
.contact__list{display:flex;flex-direction:column;gap:14px;margin-bottom:26px}
.contact__list li{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline;font-size:1.04rem;border-bottom:1px solid rgba(20,20,20,.15);padding-bottom:12px}
.ci{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;background:var(--ink);color:var(--yellow);padding:.3em .6em;border-radius:6px}
.contact__list a:hover{text-decoration:underline}
.map-btn{align-self:flex-start}

.contact__form{background:var(--white);border-radius:var(--r);padding:30px;box-shadow:var(--shadow)}
.contact__form h3{font-family:var(--font-display);font-weight:600;text-transform:uppercase;font-size:1.4rem;margin-bottom:18px}
.contact__form label{display:flex;flex-direction:column;gap:6px;font-size:.86rem;font-weight:600;color:var(--ink);margin-bottom:14px}
.contact__form input,.contact__form textarea{
  font-family:var(--font-body);font-size:1rem;font-weight:400;
  padding:.7em .85em;border:1.5px solid var(--line);border-radius:9px;background:var(--soft);
  transition:border-color .2s, background .2s;
}
.contact__form input:focus,.contact__form textarea:focus{
  outline:none;border-color:var(--yellow-deep);background:var(--white);
  box-shadow:0 0 0 3px rgba(255,200,0,.25);
}
.contact__form textarea{resize:vertical}
.form-note{margin-top:12px;font-weight:600;font-size:.92rem;min-height:1.2em}
.form-note.ok{color:var(--green)}
.form-note.err{color:#C0392B}

/* ---------- Footer ---------- */
.footer{background:var(--ink);color:#C9CDD3}
.footer__inner{display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;align-items:center;padding:22px 24px;font-size:.9rem}
.footer__tag{font-family:var(--font-mono);font-size:.8rem;color:var(--yellow);letter-spacing:.04em}

/* ---------- To top ---------- */
.to-top{
  position:fixed;right:20px;bottom:20px;z-index:40;
  width:46px;height:46px;display:grid;place-items:center;border-radius:50%;
  background:var(--ink);color:var(--yellow);font-size:1.3rem;
  opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s var(--ease);
  box-shadow:var(--shadow);
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--yellow);color:var(--ink)}

/* ---------- Scroll reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:980px){
  .why__grid,.svc__grid{grid-template-columns:repeat(2,1fr)}
  .feat--wide{grid-column:span 2}
  .gallery,.logo-grid{grid-template-columns:repeat(3,1fr)}
  .gal-item:nth-child(1),.gal-item:nth-child(2){grid-column:span 1}
  .hero__inner{grid-template-columns:1fr;gap:30px}
  .hero__visual{order:-1}
  .machine-ph{max-width:320px}
  .contact__inner{grid-template-columns:1fr;gap:32px}
}
@media (max-width:680px){
  .section{padding:60px 0}
  .nav__links{
    position:fixed;inset:70px 0 auto 0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--white);border-bottom:1px solid var(--line);
    padding:8px 24px 20px;transform:translateY(-130%);transition:transform .3s var(--ease);
    box-shadow:var(--shadow);
  }
  .nav__links.open{transform:none}
  .nav__links a{padding:14px 4px;border-bottom:1px solid var(--line)}
  .nav__cta{margin-top:12px;text-align:center}
  .nav__toggle{display:flex}
  .nav__toggle.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .nav__toggle.open span:nth-child(2){opacity:0}
  .nav__toggle.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .why__grid,.svc__grid,.gallery,.logo-grid{grid-template-columns:repeat(2,1fr)}
  .feat--wide{grid-column:span 2}
  .hero__actions .btn{flex:1}
}
@media (max-width:430px){
  .logo-grid{grid-template-columns:1fr 1fr}
  .feat--wide{grid-column:span 1}
}