/* ============================================================
   Koa Louvre - site styles
   Palette: architectural charcoal + warm "koa" timber gold
   ============================================================ */

:root{
  --ink:#15202b;
  --ink-2:#1d2a38;
  --ink-3:#273746;
  --slate:#46535f;
  --muted:#6d7c88;
  --paper:#f5f7f9;
  --paper-2:#e9eef2;
  --card:#ffffff;
  --line:#d7dfe6;
  --koa:#2e7bd6;
  --koa-strong:#1e5fa0;
  --koa-soft:#e2effb;
  --white:#ffffff;

  --shadow-sm:0 1px 2px rgba(27,30,35,.06), 0 4px 14px rgba(27,30,35,.06);
  --shadow-md:0 10px 30px rgba(27,30,35,.12);
  --radius:14px;

  --font-display:"Fraunces", Georgia, "Times New Roman", serif;
  --font-body:"Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:500;
  line-height:1.12;
  color:var(--ink);
  margin:0 0 .5em;
  letter-spacing:-.01em;
}

h1{font-size:clamp(2.4rem,5.5vw,4.1rem);}
h2{font-size:clamp(1.7rem,3.4vw,2.6rem);}
h3{font-size:1.3rem;}
h4{font-size:1.05rem;font-family:var(--font-body);font-weight:700;}

p{margin:0 0 1em;}
a{color:inherit;}
a:focus-visible,button:focus-visible{outline:3px solid var(--koa);outline-offset:2px;border-radius:4px;}

em{font-style:italic;color:var(--koa);}

.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;}

.section{padding:88px 0;}
.section-alt{background:var(--paper-2);}
.section-tight{padding:56px 0;}

.eyebrow{
  font-family:var(--font-body);
  font-weight:800;
  font-size:.78rem;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--koa-strong);
  margin:0 0 14px;
}

.lede{font-size:1.13rem;color:var(--slate);max-width:620px;}

.section-head{max-width:720px;margin-bottom:44px;}
.section-head h2{margin-bottom:.25em;}
.section-head .lede{margin:0;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-body);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.01em;
  text-decoration:none;
  padding:14px 26px;
  border-radius:999px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}

.btn-accent{background:var(--koa);color:#ffffff;box-shadow:0 8px 20px rgba(46,123,214,.32);}
.btn-accent:hover{background:#3f8ce0;box-shadow:0 12px 26px rgba(46,123,214,.42);}

.btn-ink{background:var(--ink);color:var(--white);}
.btn-ink:hover{background:#2c3138;}

.btn-ghost{background:transparent;color:var(--white);border-color:rgba(255,255,255,.5);}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;}

.btn-light{background:var(--white);color:var(--ink);}
.btn-light:hover{background:var(--paper);}

.btn-block{width:100%;}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:rgba(247,244,236,.9);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-sm);}

.header-inner{display:flex;align-items:center;gap:24px;height:76px;}

.brand{display:inline-flex;align-items:center;flex-shrink:0;}
.brand-logo{height:52px;width:auto;}

.nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  font-weight:600;
  font-size:.92rem;
  color:var(--slate);
  text-decoration:none;
  padding:9px 12px;
  border-radius:8px;
  transition:color .18s ease, background .18s ease;
}
.nav-link:hover{color:var(--ink);background:rgba(27,30,35,.05);}
.nav-link.is-active{color:var(--ink);}
.nav-cta{margin-left:10px;}

.header-phone{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:800;font-size:.95rem;color:var(--ink);
  text-decoration:none;margin-left:4px;
}
.header-phone svg{color:var(--koa);}

.nav-toggle{
  display:none;
  flex-direction:column;gap:5px;
  background:none;border:0;padding:8px;cursor:pointer;margin-left:auto;
}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease, opacity .2s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:92vh;
  display:flex;
  align-items:center;
  color:var(--white);
  padding:140px 0 96px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(100deg, rgba(15,17,20,.82) 0%, rgba(15,17,20,.45) 55%, rgba(15,17,20,.25) 100%),
    url("../assets/img/hero.jpg");
  background-size:cover;
  background-position:center;
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.hero h1{color:var(--white);margin-bottom:.35em;}
.hero h1 em{color:#8fc0f2;}
.hero .eyebrow{color:#a7cdf5;}
.hero .lede{color:rgba(255,255,255,.9);max-width:600px;margin-bottom:34px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- trust strip ---------- */
.trust-strip{background:var(--ink);color:var(--white);}
.trust-items{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:rgba(255,255,255,.08);
}
.trust-item{padding:22px 20px;font-size:.95rem;color:rgba(255,255,255,.82);}
.trust-item strong{display:block;font-family:var(--font-display);font-weight:500;font-size:1.05rem;color:var(--white);}
.trust-item strong::after{content:"";display:block;width:26px;height:2px;background:var(--koa);margin:8px 0 4px;}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;}
.split-reverse .split-media{order:-1;}
.split-copy h2{margin-bottom:.4em;}
.split-media img{border-radius:var(--radius);box-shadow:var(--shadow-md);aspect-ratio:4/3;object-fit:cover;width:100%;}

/* ---------- cards ---------- */
.cards{display:grid;gap:22px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}

.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 26px;
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease, box-shadow .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.card-icon{
  width:52px;height:52px;border-radius:13px;
  display:grid;place-items:center;
  background:var(--koa-soft);color:var(--koa-strong);
  margin-bottom:18px;
}
.card-icon svg{width:26px;height:26px;}
.card h3{margin-bottom:.35em;}
.card p{color:var(--slate);font-size:.95rem;margin:0;}
.card .card-link{display:inline-block;margin-top:14px;font-weight:700;font-size:.88rem;color:var(--koa-strong);text-decoration:none;}
.card .card-link:hover{text-decoration:underline;}

/* ---------- lists ---------- */
.check-list,.value-list{list-style:none;margin:0 0 26px;padding:0;display:grid;gap:14px;}
.check-list li,.value-item{position:relative;padding-left:34px;color:var(--slate);}
.check-list li::before{
  content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;
  background:var(--koa);mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/14px no-repeat;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center/14px no-repeat;
}
.value-list{display:grid;grid-template-columns:1fr 1fr;gap:18px 28px;}
.value-item{padding-left:0;}
.value-item strong{display:block;font-family:var(--font-display);font-weight:500;font-size:1.08rem;color:var(--ink);margin-bottom:4px;}
.value-item strong::before{content:"";display:inline-block;width:9px;height:9px;border-radius:2px;background:var(--koa);margin-right:10px;transform:rotate(45deg);}
.value-item span{color:var(--slate);font-size:.95rem;}

/* ---------- steps ---------- */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step;}
.step{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow-sm);
}
.step-num{
  display:grid;place-items:center;width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:var(--koa);font-family:var(--font-display);font-size:1.25rem;
  margin-bottom:18px;
}
.step h3{margin-bottom:.3em;}
.step p{color:var(--slate);font-size:.95rem;margin:0;}

/* ---------- gallery ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:36px;}
.gallery-item{margin:0;}
.gallery-item img{border-radius:var(--radius);aspect-ratio:4/3;object-fit:cover;width:100%;box-shadow:var(--shadow-sm);}
.gallery-caption{font-size:.88rem;color:var(--muted);margin-top:10px;text-align:center;}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;background:var(--ink);color:var(--white);
  background-image:radial-gradient(1000px 500px at 80% -10%, rgba(46,123,214,.22), transparent 60%);
  padding:80px 0;
}
.cta-inner{text-align:center;max-width:720px;margin:0 auto;}
.cta-inner h2{color:var(--white);}
.cta-inner p{color:rgba(255,255,255,.82);font-size:1.08rem;margin-bottom:28px;}
.cta-inner .btn{margin-bottom:14px;}
.cta-phone{display:block;color:rgba(255,255,255,.72);text-decoration:none;font-size:.95rem;}
.cta-phone:hover{color:var(--white);text-decoration:underline;}

/* ---------- page hero (subpages) ---------- */
.page-hero{
  position:relative;color:var(--white);
  background-image:linear-gradient(110deg, rgba(15,17,20,.88) 0%, rgba(15,17,20,.5) 100%),
    url("../assets/img/hero.jpg");
  background-size:cover;background-position:center;
  padding:160px 0 84px;
}
.page-hero h1{color:var(--white);margin-bottom:.25em;}
.page-hero .lede{color:rgba(255,255,255,.88);}

/* ---------- systems page ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:28px;}
.spec-item{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;}
.spec-item svg{flex-shrink:0;width:24px;height:24px;color:var(--koa-strong);}
.spec-item strong{display:block;margin-bottom:2px;}
.spec-item span{color:var(--slate);font-size:.93rem;}

.swatches{display:flex;flex-wrap:wrap;gap:18px;margin-top:8px;}
.swatch{text-align:center;font-size:.85rem;color:var(--slate);}
.swatch span{display:block;width:64px;height:64px;border-radius:50%;border:1px solid rgba(0,0,0,.12);box-shadow:var(--shadow-sm);margin:0 auto 8px;}

/* ---------- contact ---------- */
.contact-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:44px;align-items:start;}

.contact-form{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow-sm);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:18px;}
.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:7px;}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--font-body);font-size:1rem;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);border-radius:10px;
  padding:13px 14px;transition:border-color .18s ease, box-shadow .18s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--koa);box-shadow:0 0 0 3px rgba(46,123,214,.18);background:#fff;
}
.field textarea{resize:vertical;min-height:130px;}

.form-status{display:none;margin:4px 0 16px;padding:12px 14px;border-radius:10px;font-size:.93rem;}
.form-status.success{display:block;background:#e8f3e9;color:#22603a;border:1px solid #cfe4d1;}
.form-status.error{display:block;background:#fbe9e7;color:#9c3324;border:1px solid #f0ccc6;}
.form-note{margin:14px 0 0;font-size:.85rem;color:var(--muted);}

.info-list{list-style:none;margin:0;padding:0;display:grid;gap:18px;}
.info-list li{display:flex;gap:14px;align-items:flex-start;}
.info-list .info-ico{
  flex-shrink:0;width:44px;height:44px;border-radius:11px;display:grid;place-items:center;
  background:var(--koa-soft);color:var(--koa-strong);
}
.info-list .info-ico svg{width:22px;height:22px;}
.info-list strong{display:block;font-size:.92rem;}
.info-list a,.info-list span{color:var(--slate);}
.info-list a{text-decoration:none;}
.info-list a:hover{color:var(--koa-strong);text-decoration:underline;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:52px;}
.brand-text{
  font-family:var(--font-display);font-weight:600;font-size:1.5rem;color:var(--white);
  text-decoration:none;letter-spacing:.02em;
}
.brand-text span{color:var(--koa);font-weight:400;}
.footer-brand p{margin-top:14px;font-size:.93rem;color:rgba(255,255,255,.6);max-width:280px;}
.footer-col h4{color:var(--white);margin-bottom:16px;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.footer-col a{color:rgba(255,255,255,.68);text-decoration:none;font-size:.94rem;}
.footer-col a:hover{color:var(--white);}
.footer-col address{font-style:normal;font-size:.94rem;line-height:1.8;}
.footer-col address a{color:rgba(255,255,255,.68);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;font-size:.86rem;color:rgba(255,255,255,.5);}
.footer-bottom p{margin:0;}

/* ---------- reveal animation ---------- */
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .7s ease, transform .7s ease;}
[data-reveal].is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  [data-reveal]{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media (max-width: 1024px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width: 860px){
  .section{padding:64px 0;}
  .hero{min-height:auto;padding:128px 0 72px;}

  .header-phone{display:none;}
  .brand-logo{height:44px;}
  .nav{
    position:fixed;top:76px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    padding:12px 20px 20px;
    display:none;
  }
  .nav.is-open{display:flex;}
  .nav-link{padding:14px 12px;font-size:1rem;}
  .nav-cta{margin:12px 0 0;justify-content:center;}
  .nav-toggle{display:flex;}

  .split{grid-template-columns:1fr;gap:34px;}
  .split-reverse .split-media{order:0;}
  .split-media img{aspect-ratio:16/9;}

  .trust-items{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .contact-layout{grid-template-columns:1fr;}
  .value-list{grid-template-columns:1fr;}
  .spec-grid{grid-template-columns:1fr;}
}

@media (max-width: 560px){
  .grid-4,.grid-3,.grid-2,.gallery-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .trust-items{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .contact-form{padding:22px;}
  .hero-actions .btn{width:100%;}
}