/* ==========================================================================
   PROMSTROYBETON — premium light theme
   Notes:
   - Site works without JS (navigation uses CSS toggle).
   - Animations respect prefers-reduced-motion.
   ========================================================================== */

:root{
  --bg:#f6f8fc;
  --bg2:#eef2f7;
  --surface:#ffffff;
  --surface2:#f8fafc;
  --stroke:rgba(16,24,40,.12);

  --text:#101828;
  --muted:#475467;
  --muted2:#667085;

  --accent:#ffb703;   /* amber */
  --accent2:#2de2e6;  /* turquoise */
  --danger:#e11d48;
  --ok:#16a34a;

  --shadow: 0 20px 60px rgba(16,24,40,.12);
  --shadow2: 0 12px 28px rgba(16,24,40,.10);

  --radius:16px;
  --radius2:22px;
  --container: 1180px;
  --ring: 0 0 0 3px rgba(45,226,230,.30);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: system-ui,-apple-system,Segoe UI,Roboto,Arial,"Noto Sans",sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 18% -10%, rgba(45,226,230,.18), transparent 60%),
    radial-gradient(850px 520px at 86% 0%, rgba(255,183,3,.16), transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg2) 75%);
  line-height:1.6;
}

img{max-width:100%; height:auto}
a{color:inherit; text-decoration:none}
a:hover{text-decoration:none}

.skip-link{
  position:absolute; left:-999px; top:0;
  background:var(--surface);
  color:var(--text);
  padding:.6rem .9rem;
  border:1px solid var(--stroke);
  border-radius:12px;
  z-index:1000;
}
.skip-link:focus{left:12px; top:12px; outline:none; box-shadow:var(--ring)}

.container{max-width:var(--container); margin:0 auto; padding:0 18px}

.topbar{
  background: rgba(255,255,255,.78);
  border-bottom:1px solid var(--stroke);
  backdrop-filter: blur(12px);
}
.topbar__inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:12px;
  padding:10px 0;
  font-size: 13px;
  color: var(--muted);
}
.badge{
  display:inline-flex; align-items:center; gap:8px;
  padding:.25rem .55rem;
  border:1px solid rgba(16,24,40,.14);
  background: rgba(255,255,255,.72);
  border-radius:999px;
  white-space:nowrap;
}
.badge__dot{
  width:9px; height:9px; border-radius:50%;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  box-shadow: 0 0 0 3px rgba(45,226,230,.12);
}

header.site-header{
  position:sticky; top:0;
  z-index: 800;
  background: rgba(246,248,252,.86);
  border-bottom:1px solid var(--stroke);
  backdrop-filter: blur(14px);
}
.header__inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:14px;
  padding:12px 0;
}
.brand{
  display:flex; align-items:center; gap:12px;
  min-width: 220px;
}
.brand img{width:190px; height:auto}
.brand__tag{
  display:none;
  font-size:12px; color:var(--muted)
}

.nav-toggle{position:absolute; left:-9999px}
.nav{
  display:flex; align-items:center; gap:14px;
}
.nav__links{
  display:flex; align-items:center; gap:12px;
}
.nav__links a{
  font-weight:600;
  font-size:14px;
  padding:10px 10px;
  border-radius:12px;
  color: rgba(16,24,40,.92);
}
.nav__links a:hover{
  background: rgba(16,24,40,.06);
}
.nav__links a[aria-current="page"]{
  background: rgba(45,226,230,.10);
  border:1px solid rgba(45,226,230,.25);
}

.burger{
  display:none;
  width:44px; height:44px;
  align-items:center; justify-content:center;
  border-radius:14px;
  border:1px solid rgba(16,24,40,.14);
  background: rgba(255,255,255,.78);
  cursor:pointer;
}
.burger span{
  display:block;
  width:18px; height:2px;
  background: var(--text);
  position:relative;
}
.burger span::before,
.burger span::after{
  content:"";
  position:absolute; left:0;
  width:18px; height:2px;
  background: var(--text);
}
.burger span::before{top:-6px}
.burger span::after{top:6px}

.cta-row{display:flex; align-items:center; gap:10px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap:10px;
  padding:12px 14px;
  border-radius:14px;
  border:1px solid rgba(16,24,40,.12);
  background: rgba(255,255,255,.86);
  color: var(--text);
  font-weight:700;
  font-size:14px;
  box-shadow: 0 10px 28px rgba(16,24,40,.10);
}
.btn:hover{transform: translateY(-1px); box-shadow: var(--shadow2)}
.btn:active{transform: translateY(0)}
.btn--primary{
  background: linear-gradient(135deg, rgba(45,226,230,.92), rgba(255,183,3,.92));
  color: #0b1220;
  border-color: rgba(16,24,40,.12);
}
.btn--ghost{
  background: transparent;
  box-shadow: none;
}
.btn--ghost:hover{background: rgba(16,24,40,.06); transform:none}
.btn:focus{outline:none; box-shadow: var(--ring)}

.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid rgba(16,24,40,.08);
}
.hero__media{
  position:absolute; inset:0;
  z-index:-2;
}
.hero__media img{
  width:100%; height:100%;
  object-fit:cover;
  filter: saturate(0.9) contrast(1.05);
  transform: scale(1.02);
}
.hero__overlay{
  position:absolute; inset:0;
  z-index:-1;
  background:
    radial-gradient(900px 520px at 15% 15%, rgba(45,226,230,.22), transparent 65%),
    radial-gradient(900px 520px at 85% 10%, rgba(255,183,3,.18), transparent 65%),
    linear-gradient(180deg, rgba(255,255,255,.66), rgba(246,248,252,.92));
}
.hero__inner{
  padding: 56px 0 34px;
}
.hero__grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 22px;
  align-items: start;
}
.kicker{
  display:flex; align-items:center; gap:10px;
  color: rgba(16,24,40,.92);
  font-weight:800;
  letter-spacing:.02em;
  font-size: 13px;
  text-transform: uppercase;
}
.kicker::before{
  content:"";
  width:10px; height:10px; border-radius:50%;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  box-shadow: 0 0 0 4px rgba(45,226,230,.14);
}
.hero h1{
  margin:.65rem 0 .7rem;
  line-height:1.12;
  font-size: clamp(28px, 3.2vw, 46px);
}
.lead{
  color: rgba(16,24,40,.86);
  font-size: 16px;
  max-width: 62ch;
}
.hero__bullets{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:10px;
  margin: 18px 0 18px;
  padding:0;
  list-style:none;
}
.hero__bullets li{
  border:1px solid rgba(16,24,40,.12);
  background: rgba(255,255,255,.78);
  border-radius: 16px;
  padding:10px 12px;
  color: rgba(16,24,40,.92);
  font-weight:600;
  font-size: 14px;
}
.hero__note{
  color: var(--muted);
  font-size: 13px;
  margin-top: 10px;
}

.card{
  border: 1px solid rgba(16,24,40,.12);
  background: rgba(255,255,255,.88);
  border-radius: var(--radius2);
  box-shadow: var(--shadow2);
}
.card__inner{padding:18px}
.card__title{margin:0 0 10px; font-size:16px}
.card__text{margin:0; color: var(--muted); font-size: 13px}

.form{
  display:grid;
  gap:12px;
}
.form label{font-weight:700; font-size:13px}
.field{
  display:grid;
  gap:6px;
}
input, select, textarea{
  width:100%;
  border-radius: 14px;
  border: 1px solid rgba(16,24,40,.14);
  background: rgba(255,255,255,.92);
  color: var(--text);
  padding:12px 12px;
  font-size: 14px;
}
textarea{min-height:110px; resize:vertical}
input::placeholder, textarea::placeholder{color: rgba(71,84,103,.75)}
input:focus, select:focus, textarea:focus{outline:none; box-shadow: var(--ring); border-color: rgba(45,226,230,.35)}
.help{
  font-size: 12px;
  color: var(--muted);
}
.checkbox{
  display:flex; gap:10px; align-items:flex-start;
  color: rgba(16,24,40,.9);
  font-size: 13px;
}
.checkbox input{width:auto; margin-top:4px}

.section{padding: 46px 0}
.section__head{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.section__title{
  margin:0;
  font-size: clamp(20px, 2.1vw, 30px);
  line-height:1.2;
}
.section__sub{
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 72ch;
}
.grid{
  display:grid;
  gap: 14px;
}
.grid--3{grid-template-columns: repeat(3, minmax(0,1fr))}
.grid--2{grid-template-columns: repeat(2, minmax(0,1fr))}
.grid--4{grid-template-columns: repeat(4, minmax(0,1fr))}
.tile{
  padding:16px;
  border-radius: 18px;
  border:1px solid rgba(16,24,40,.12);
  background: rgba(255,255,255,.78);
  box-shadow: 0 10px 26px rgba(16,24,40,.10);
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.tile:hover{
  transform: translateY(-2px);
  border-color: rgba(45,226,230,.28);
  background: rgba(255,255,255,.92);
}
.tile h3{margin:0 0 6px; font-size:16px}
.tile p{margin:0; color:var(--muted); font-size:13px}
.tile__meta{margin-top:10px; display:flex; flex-wrap:wrap; gap:8px}
.pill{
  display:inline-flex; align-items:center;
  padding:6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(16,24,40,.12);
  background: rgba(255,255,255,.72);
  color: rgba(16,24,40,.90);
  font-size: 12px;
  font-weight:700;
}

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items:start;
}
.surface{
  background: rgba(255,255,255,.84);
  border:1px solid rgba(16,24,40,.10);
  border-radius: var(--radius2);
  padding: 18px;
}
.surface h3{margin:0 0 10px}
.surface p{margin:0; color: var(--muted)}
.surface ul{margin:10px 0 0; padding-left: 18px; color: rgba(16,24,40,.92)}
.surface li{margin:6px 0}

.table{
  width:100%;
  border-collapse: collapse;
  overflow:hidden;
  border-radius: 16px;
  border:1px solid rgba(16,24,40,.12);
}
.table th, .table td{
  padding:12px 12px;
  text-align:left;
  border-bottom:1px solid rgba(16,24,40,.10);
  font-size: 14px;
}
.table th{
  background: rgba(16,24,40,.04);
  color: rgba(16,24,40,.92);
}
.table td{color: rgba(16,24,40,.86)}
.table tr:last-child td{border-bottom:none}

.breadcrumbs{
  font-size: 13px;
  color: rgba(71,84,103,.92);
  padding: 14px 0 0;
}
.breadcrumbs a{color: rgba(16,24,40,.88)}
.breadcrumbs a:hover{text-decoration:underline}
.breadcrumbs span{opacity:.75}

.notice{
  border: 1px solid rgba(255,183,3,.25);
  background: rgba(255,183,3,.08);
  border-radius: 16px;
  padding: 12px 14px;
  color: rgba(16,24,40,.92);
  font-size: 13px;
}
.notice strong{color: rgba(255,233,180,.98)}

.footer{
  margin-top: 40px;
  border-top:1px solid rgba(16,24,40,.10);
  background: rgba(255,255,255,.82);
}
.footer__grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr 1fr;
  gap:16px;
  padding: 28px 0;
}
.footer small{color: var(--muted)}
.footer a{color: rgba(16,24,40,.90)}
.footer a:hover{text-decoration:underline}
.footer__title{
  font-weight:800; margin:0 0 10px; font-size:14px;
}
.footer__links{display:grid; gap:8px; font-size:14px}
.footer__bottom{
  border-top:1px solid rgba(16,24,40,.10);
  padding: 14px 0;
  color: var(--muted);
  font-size: 12px;
  display:flex; gap:10px; justify-content:space-between; flex-wrap:wrap;
}

.kv{
  display:grid; gap: 8px;
}
.kv__item{
  display:flex; gap:10px; align-items:flex-start;
  padding: 10px 12px;
  border:1px solid rgba(16,24,40,.10);
  background: rgba(255,255,255,.74);
  border-radius: 14px;
}
.kv__k{min-width: 120px; color: var(--muted); font-size: 12px; font-weight:800; text-transform:uppercase}
.kv__v{color: rgba(16,24,40,.92); font-size: 14px}

.anchor-offset{scroll-margin-top: 92px}

/* Responsive */
@media (max-width: 980px){
  .hero__grid{grid-template-columns: 1fr; gap:14px}
  .grid--3{grid-template-columns: repeat(2, minmax(0,1fr))}
  .grid--4{grid-template-columns: repeat(2, minmax(0,1fr))}
  .split{grid-template-columns: 1fr}
  .brand img{width: 172px}
}
@media (max-width: 820px){
  .burger{display:flex}
  .nav__links{
    position: fixed;
    inset: 70px 12px auto 12px;
    background: rgba(255,255,255,.96);
    border:1px solid rgba(16,24,40,.12);
    border-radius: 18px;
    padding: 10px;
    box-shadow: var(--shadow);
    display:none;
    flex-direction: column;
    align-items: stretch;
  }
  .nav__links a{padding:12px 12px}
  .nav-toggle:checked ~ .nav .nav__links{display:flex}
  .cta-row .btn--ghost{display:none}
  .footer__grid{grid-template-columns: 1fr; gap: 12px}
}
@media (max-width: 520px){
  .hero__bullets{grid-template-columns: 1fr}
  .topbar__inner{flex-direction:column; align-items:flex-start}
.cta-row{flex-wrap:wrap}
.cta-row .btn{width:100%}
.hero__inner{padding: 38px 0 22px}
.section{padding: 38px 0}
.brand{min-width: unset}
.brand img{width: 156px}
input, select, textarea{font-size:16px}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .btn, .tile{transition:none}
  .btn:hover, .tile:hover{transform:none}
}

/* Print */
@media print{
  header.site-header, .topbar, .footer, .hero__media, .hero__overlay, .btn{display:none !important}
  body{background:#fff; color:#000}
  a{text-decoration:underline}
}