/* ==========================================================================
   CAD Model House — Direction A (ink + concrete + amber)
   Hand-built, no framework. Mobile-first.
   ========================================================================== */

:root{
  --ink:#101820;
  --ink-2:#0b1119;
  --ink-3:#1b2733;
  --ink-line:#26313d;
  --concrete:#f4f2ed;
  --concrete-2:#ece9e2;
  --paper:#ffffff;
  --amber:#d97a2b;
  --amber-600:#bd6620;
  --amber-100:#f6e6d5;
  --blue:#0078c0;         /* logo blue, secondary accent */
  --text:#101820;
  --text-muted:#5d6670;
  --text-on-ink:#f4f2ed;
  --text-on-ink-muted:#aab2bb;
  --border:#e3ddd1;
  --radius:12px;
  --radius-sm:8px;
  --maxw:1180px;
  --pad:clamp(20px,5vw,28px);
  --sans:"Open Sans",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  --head:"Raleway",var(--sans);
  --shadow:0 18px 40px -22px rgba(16,24,32,.35);
  --shadow-sm:0 8px 22px -14px rgba(16,24,32,.35);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--text);
  background:var(--concrete);line-height:1.65;font-size:17px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

h1,h2,h3,h4{font-family:var(--head);font-weight:700;line-height:1.12;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.6vw,3.25rem)}
h2{font-size:clamp(1.6rem,3.2vw,2.3rem)}
h3{font-size:1.15rem;font-weight:600}
p{margin:0 0 1rem}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.section{padding:clamp(56px,8vw,96px) 0}
.eyebrow{font-family:var(--head);font-weight:700;font-size:.8rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--amber);margin:0 0 .7rem}
.section-head{max-width:640px;margin-bottom:clamp(28px,4vw,44px)}
.section-head p{color:var(--text-muted);font-size:1.05rem;margin:0}
.lead{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--text-muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);border:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--head);font-weight:700;
  font-size:.95rem;padding:.8rem 1.4rem;border-radius:var(--radius-sm);border:1.5px solid transparent;
  cursor:pointer;transition:transform .15s ease,background .2s ease,border-color .2s ease,color .2s ease;
  letter-spacing:.01em;line-height:1}
.btn svg{width:18px;height:18px}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--amber);color:#231206}
.btn-primary:hover{background:var(--amber-600)}
.btn-ghost{background:transparent;border-color:currentColor;color:var(--text)}
.btn-ghost:hover{background:rgba(16,24,32,.06)}
.on-ink .btn-ghost,.btn-ghost.on-ink{color:var(--text-on-ink);border-color:rgba(244,242,237,.4)}
.on-ink .btn-ghost:hover{background:rgba(244,242,237,.1)}

/* ---------- header / nav ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(16,24,32,.92);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--ink-line)}
.nav{display:flex;align-items:center;gap:1.2rem;height:70px}
.brand{display:flex;align-items:center;gap:.6rem;margin-right:auto}
.brand img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:1.4rem;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--text-on-ink-muted);font-family:var(--head);font-weight:600;font-size:.95rem;
  position:relative;padding:.3rem 0;transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--text-on-ink)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--amber)}
.nav-actions{display:flex;align-items:center;gap:.8rem}
.lang-toggle{display:inline-flex;border:1px solid var(--ink-line);border-radius:999px;overflow:hidden}
.lang-toggle button{background:transparent;border:0;color:var(--text-on-ink-muted);font-family:var(--head);
  font-weight:700;font-size:.78rem;letter-spacing:.06em;padding:.35rem .7rem;cursor:pointer}
.lang-toggle button[aria-pressed="true"]{background:var(--amber);color:#231206}
.nav-phone{display:inline-flex;align-items:center;gap:.45rem;color:var(--text-on-ink);
  font-family:var(--head);font-weight:700;font-size:.92rem}
.nav-phone svg{width:16px;height:16px;color:var(--amber)}
.nav-toggle{display:none;background:transparent;border:0;color:var(--text-on-ink);cursor:pointer;padding:.3rem}
.nav-toggle svg{width:28px;height:28px}

/* ---------- hero ---------- */
.hero{background:var(--ink);color:var(--text-on-ink);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(60% 80% at 85% 10%,rgba(0,120,192,.16),transparent 60%),
             radial-gradient(50% 60% at 5% 90%,rgba(217,122,43,.14),transparent 60%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,64px);
  align-items:center;padding:clamp(48px,7vw,88px) 0}
.hero h1{color:#fff;margin-bottom:1rem}
.hero .lead{color:var(--text-on-ink-muted);max-width:40ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero-figure{position:relative}
.hero-figure img{width:100%;border-radius:16px;box-shadow:var(--shadow);
  aspect-ratio:4/5;object-fit:cover;border:1px solid rgba(244,242,237,.08)}
.hero-badge{position:absolute;left:-14px;bottom:26px;background:var(--amber);color:#231206;
  font-family:var(--head);font-weight:700;padding:.7rem 1rem;border-radius:10px;box-shadow:var(--shadow-sm);
  display:flex;align-items:center;gap:.55rem;font-size:.92rem}
.hero-badge svg{width:20px;height:20px}

/* ---------- stats strip ---------- */
.stats{background:var(--ink-2);color:var(--text-on-ink);border-top:1px solid var(--ink-line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;padding:clamp(24px,4vw,36px) 0}
.stat{text-align:center}
.stat b{display:block;font-family:var(--head);font-weight:700;font-size:clamp(1.5rem,3vw,2rem);color:var(--amber)}
.stat span{color:var(--text-on-ink-muted);font-size:.9rem}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,60px);align-items:center}
.about-figure img{border-radius:16px;box-shadow:var(--shadow-sm);aspect-ratio:5/4;object-fit:cover;width:100%}
.feature-list{list-style:none;margin:1.2rem 0 0;padding:0;display:grid;gap:.9rem}
.feature-list li{display:flex;gap:.7rem;align-items:flex-start}
.feature-list svg{width:22px;height:22px;color:var(--amber);flex:none;margin-top:2px}
.feature-list b{font-family:var(--head)}

/* ---------- services ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.card{background:var(--paper);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.5rem 1.35rem;transition:transform .2s ease,box-shadow .2s ease,border-color .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d8cfbd}
.card-ico{width:48px;height:48px;border-radius:12px;background:var(--amber-100);color:var(--amber-600);
  display:flex;align-items:center;justify-content:center;margin-bottom:1rem}
.card-ico svg{width:26px;height:26px}
.card h3{margin-bottom:.35rem}
.card p{color:var(--text-muted);font-size:.96rem;margin:0}

/* ---------- process ---------- */
.process{background:var(--concrete-2)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;counter-reset:step}
.step{position:relative;padding-top:.5rem}
.step-n{width:44px;height:44px;border-radius:50%;background:var(--ink);color:var(--amber);
  font-family:var(--head);font-weight:700;display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;margin-bottom:.9rem}
.step h3{margin-bottom:.3rem}
.step p{color:var(--text-muted);font-size:.95rem;margin:0}

/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.shot{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;
  background:var(--concrete-2);border:1px solid var(--border);cursor:pointer}
.shot img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.shot:hover img{transform:scale(1.06)}
.shot figcaption{position:absolute;left:0;right:0;bottom:0;padding:.7rem .9rem;color:#fff;
  font-family:var(--head);font-weight:600;font-size:.9rem;
  background:linear-gradient(to top,rgba(11,17,25,.85),transparent);opacity:0;transition:opacity .25s}
.shot:hover figcaption,.shot:focus-visible figcaption{opacity:1}
.shot .zoom{position:absolute;top:.7rem;right:.7rem;width:34px;height:34px;border-radius:50%;
  background:rgba(16,24,32,.6);color:#fff;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .25s}
.shot:hover .zoom{opacity:1}
.shot .zoom svg{width:18px;height:18px}
/* placeholder tile (invite to add project) */
.shot-add{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;
  color:var(--text-muted);text-align:center;padding:1rem;border-style:dashed;border-color:#cfc7b6}
.shot-add svg{width:30px;height:30px;color:var(--amber)}
.shot-add span{font-family:var(--head);font-weight:600;font-size:.9rem}

/* ---------- lightbox ---------- */
.lb{position:fixed;inset:0;z-index:100;background:rgba(8,12,17,.92);display:none;
  align-items:center;justify-content:center;padding:24px}
.lb.open{display:flex}
.lb img{max-width:min(92vw,1100px);max-height:86vh;border-radius:10px;box-shadow:0 30px 80px -30px #000}
.lb-btn{position:absolute;background:rgba(244,242,237,.1);border:1px solid rgba(244,242,237,.25);
  color:#fff;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer}
.lb-btn:hover{background:rgba(244,242,237,.2)}
.lb-btn svg{width:22px;height:22px}
.lb-close{top:20px;right:20px}
.lb-prev{left:20px;top:50%;transform:translateY(-50%)}
.lb-next{right:20px;top:50%;transform:translateY(-50%)}

/* ---------- contact ---------- */
.contact{background:var(--ink);color:var(--text-on-ink)}
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(28px,5vw,56px)}
.contact h2{color:#fff}
.contact .lead{color:var(--text-on-ink-muted)}
.contact-info{list-style:none;margin:1.6rem 0 0;padding:0;display:grid;gap:1.1rem}
.contact-info li{display:flex;gap:.8rem;align-items:flex-start}
.contact-info svg{width:22px;height:22px;color:var(--amber);flex:none;margin-top:3px}
.contact-info a{color:var(--text-on-ink);border-bottom:1px solid transparent}
.contact-info a:hover{border-color:var(--amber)}
.contact-info small{display:block;color:var(--text-on-ink-muted)}
.socials{display:flex;gap:.7rem;margin-top:1.6rem}
.socials a{width:42px;height:42px;border-radius:10px;border:1px solid var(--ink-line);
  display:flex;align-items:center;justify-content:center;color:var(--text-on-ink);transition:.2s}
.socials a:hover{background:var(--amber);color:#231206;border-color:var(--amber)}
.socials svg{width:20px;height:20px}

.form{background:var(--paper);color:var(--text);border-radius:16px;padding:clamp(20px,3vw,32px);box-shadow:var(--shadow)}
.field{margin-bottom:1rem}
.field label{display:block;font-family:var(--head);font-weight:600;font-size:.9rem;margin-bottom:.35rem}
.field input,.field textarea{width:100%;font:inherit;padding:.7rem .85rem;border:1.5px solid var(--border);
  border-radius:var(--radius-sm);background:#fbfaf7;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--amber);box-shadow:0 0 0 3px rgba(217,122,43,.16)}
.field textarea{resize:vertical;min-height:120px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.consent{display:flex;gap:.6rem;align-items:flex-start;font-size:.9rem;color:var(--text-muted)}
.consent input{margin-top:4px;width:18px;height:18px;flex:none}
.consent a{color:var(--amber-600);border-bottom:1px solid currentColor}
.form .btn-primary{width:100%;justify-content:center;margin-top:.4rem}
.form-status{margin-top:.9rem;font-size:.92rem;padding:.7rem .9rem;border-radius:var(--radius-sm);display:none}
.form-status.show{display:block}
.form-status.ok{background:#e7f4ec;color:#1c6b3f;border:1px solid #bfe3cd}
.form-status.err{background:#fbe9e7;color:#a3392c;border:1px solid #f0c7c1}

/* ---------- footer ---------- */
.footer{background:var(--ink-2);color:var(--text-on-ink-muted);padding:clamp(40px,6vw,64px) 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.footer img{height:36px;margin-bottom:1rem}
.footer h4{font-family:var(--head);color:var(--text-on-ink);font-size:.85rem;letter-spacing:.1em;
  text-transform:uppercase;margin-bottom:1rem}
.footer ul{list-style:none;margin:0;padding:0;display:grid;gap:.6rem}
.footer a:hover{color:var(--amber)}
.footer-bottom{border-top:1px solid var(--ink-line);padding-top:1.4rem;display:flex;
  justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.85rem}

/* ---------- reveal animation (progressive enhancement) ----------
   Only hidden when JS is active (html.js). Without JS, content stays visible. */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal{opacity:1;transform:none;transition:none}}

/* offset for sticky header on anchor jumps */
[id]{scroll-margin-top:86px}

/* =================== legal / prose pages =================== */
.legal-header{background:var(--ink);border-bottom:1px solid var(--ink-line)}
.legal-header .nav{height:64px}
.legal-header img{height:30px}
.legal-actions{margin-left:auto;display:flex;align-items:center;gap:1rem}
.legal-header .back{color:var(--text-on-ink-muted);font-family:var(--head);
  font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:.4rem}
.legal-header .back:hover{color:var(--text-on-ink)}
.legal-header .back svg{width:16px;height:16px}
.lang-block[hidden]{display:none}
.prose{max-width:820px;margin-inline:auto;padding:clamp(40px,7vw,72px) var(--pad)}
.prose h1{margin-bottom:.2em}
.prose .updated{color:var(--text-muted);font-size:.9rem;margin-bottom:2rem}
.prose h2{font-size:1.35rem;margin-top:2.2rem}
.prose p,.prose li{color:#2a333d}
.prose ul{padding-left:1.2rem;display:grid;gap:.4rem}
.prose a{color:var(--amber-600);border-bottom:1px solid currentColor}

/* =================== responsive =================== */
@media (max-width:960px){
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .hero-figure{order:-1;max-width:420px}
  .cards,.steps{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:1.4rem}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav-links,.nav-phone{display:none}
  .nav-toggle{display:inline-flex}
  .nav-links.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;
    align-items:flex-start;gap:.2rem;background:var(--ink);border-bottom:1px solid var(--ink-line);
    padding:.6rem var(--pad) 1rem}
  .nav-links.open a{width:100%;padding:.7rem 0;border-bottom:1px solid var(--ink-line);font-size:1.05rem}
  .nav-links.open a.active::after{display:none}
}
@media (max-width:620px){
  body{font-size:16px}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .hero-cta .btn{flex:1;justify-content:center}
}
@media (max-width:400px){
  .cards,.steps,.stats-grid,.gallery{grid-template-columns:1fr}
}