/* Royal Carbon — shared stylesheet */

:root{
  --ink:#1c1712;
  --ink-soft:#4a4038;
  --paper:#faf7f2;
  --paper-alt:#f1ebe0;
  --card:#ffffff;
  --ember:#c65a26;
  --ember-dark:#9c4319;
  --char:#211a15;
  --line:#e4dccd;
  --ok:#2f6b4f;
  --radius:14px;
  --maxw:1160px;
  font-size:16px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4{font-family:'Manrope',sans-serif;line-height:1.15;margin:0 0 .5em;font-weight:800;letter-spacing:-0.01em;}
p{margin:0 0 1em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
section{padding:88px 0;}
@media (max-width:720px){section{padding:56px 0;}}

.eyebrow{
  display:inline-block;
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ember-dark);
  background:rgba(198,90,38,.1);
  padding:6px 12px;
  border-radius:999px;
  margin-bottom:16px;
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 26px;
  border-radius:10px;
  font-weight:700;
  font-size:.95rem;
  text-decoration:none;
  border:2px solid transparent;
  cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn-primary{background:var(--ember);color:#fff;box-shadow:0 6px 18px rgba(198,90,38,.28);}
.btn-primary:hover{background:var(--ember-dark);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:var(--ink);color:#fff;}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;}

/* header */
header.site{
  position:sticky;top:0;z-index:40;
  background:rgba(250,247,242,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
header.site::before{content:"";display:block;height:4px;background:linear-gradient(90deg,#2f6b4f 0 34%,#d5a82e 34% 67%,var(--ember) 67% 100%);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--maxw);margin:0 auto;}
.logo{font-weight:800;text-decoration:none;display:flex;align-items:center;gap:10px;line-height:1;}
.logo .mark,.logo-mark{width:44px;height:48px;flex:none;display:block;}
.logo .mark{background:#101312 url('/assets/img/royal-carbon-rc-mark.png') center/contain no-repeat;border-radius:10px;}
.logo-mark{object-fit:contain;object-position:center;background:#101312;border-radius:10px;padding:4px;}
.logo-copy{display:flex;flex-direction:column;gap:4px;}
.logo-copy strong{font-size:1.08rem;letter-spacing:-.02em;}
.logo-copy small{font-size:.61rem;line-height:1.05;letter-spacing:.06em;color:var(--ink-soft);}
nav.links{display:flex;gap:28px;font-weight:600;font-size:.92rem;}
nav.links a{text-decoration:none;opacity:.8;}
nav.links a:hover{opacity:1;}
.lang-switch{display:flex;gap:4px;font-size:.85rem;font-weight:700;}
.lang-switch a{padding:4px 8px;border-radius:6px;text-decoration:none;opacity:.55;}
.lang-switch a.active{opacity:1;background:var(--paper-alt);}
.nav-right{display:flex;align-items:center;gap:18px;}
.burger{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;}
@media (max-width:860px){
  nav.links{display:none;}
  .burger{display:block;}
}

/* hero */
.hero{padding:58px 0 64px;background:radial-gradient(circle at 88% 6%,rgba(198,90,38,.10),transparent 32%),var(--paper);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:34px;align-items:start;}
.hero-copy{max-width:1050px;min-width:0;}
.hero h1{font-size:clamp(2.35rem,5vw,4.7rem);max-width:17ch;letter-spacing:-.045em;}
.hero .lead{font-size:clamp(1rem,1.8vw,1.22rem);color:var(--ink-soft);max-width:70ch;}
.hero-visual{
  aspect-ratio:16/9;border-radius:20px;
  background:linear-gradient(150deg,var(--char) 0%, #3a291d 55%, var(--ember) 130%);
  position:relative;overflow:hidden;
  display:flex;align-items:flex-end;
  box-shadow:0 24px 55px rgba(45,29,18,.18);
}
.hero-visual img,.hero-visual video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000;}
.hero-visual .scrim{position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,15,10,0) 40%,rgba(20,15,10,.75) 100%);pointer-events:none;}
.hero-visual .brandmark{position:absolute;top:18px;left:18px;right:auto;bottom:auto;width:150px;height:auto;object-fit:contain;opacity:.95;pointer-events:none;}
.hero-visual svg{position:absolute;inset:0;width:100%;height:100%;opacity:.5;}
.hero-visual .tag{position:relative;color:#fff;padding:20px;font-weight:700;font-size:.9rem;width:100%;}
.offer-list{list-style:none;margin:30px 0 24px;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}
.offer-list li{display:flex;min-width:0;gap:12px;align-items:flex-start;font-weight:700;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 10px 26px rgba(28,23,18,.05);overflow-wrap:anywhere;}
.offer-list .num{
  flex:none;width:28px;height:28px;border-radius:8px;background:var(--paper-alt);
  display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;color:var(--ember-dark);
}
.feedstock-note{font-size:.85rem;color:var(--ink-soft);margin-top:18px;}
@media (max-width:720px){
  .nav-inner{padding:11px 16px;}
  .logo .mark,.logo-mark{width:39px;height:42px;}
  .logo-copy strong{font-size:1rem;}
  .logo-copy small{font-size:.57rem;}
  .nav-right{gap:8px;}
  .lang-switch a{padding:5px 6px;}
  .hero{padding:40px 0 48px;}
  .hero h1{font-size:clamp(1.82rem,7.2vw,2rem);line-height:1.08;max-width:none;overflow-wrap:normal;}
  .offer-list{grid-template-columns:minmax(0,1fr);gap:10px;}
  .offer-list li{padding:15px;}
  .hero-visual{border-radius:14px;}
  .hero .btn-row{display:grid;grid-template-columns:1fr;}
  .hero .btn{justify-content:center;width:100%;}
}

/* two column value section */
.value-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
@media (max-width:800px){.value-grid{grid-template-columns:1fr;}}
.value-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px;}
.value-card h3{font-size:1.15rem;}
.value-card ul{margin:0;padding-left:1.1em;color:var(--ink-soft);}
.value-card li{margin-bottom:8px;}

/* founder */
.founder{background:var(--char);color:#f4ede2;border-radius:var(--radius);padding:48px;display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center;}
@media (max-width:700px){.founder{grid-template-columns:1fr;padding:32px;}}
.founder-avatar{width:150px;height:150px;border-radius:50%;background:linear-gradient(135deg,var(--ember),#e08a4f);flex:none;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.6rem;overflow:hidden;}
.founder-avatar img{width:100%;height:100%;object-fit:cover;}
@media (max-width:700px){.founder-avatar{width:180px;height:180px;}}
.founder blockquote{margin:12px 0 0;font-size:1.1rem;font-style:italic;color:#e8dfd2;}
.founder .name{font-weight:800;font-size:1.2rem;}
.founder .role{color:#c9bfae;font-size:.9rem;}

/* lead magnet */
.leadmagnet{background:var(--paper-alt);border-radius:var(--radius);padding:44px;text-align:center;}
.leadmagnet h3{font-size:1.5rem;}

/* portfolio */
.portfolio-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
@media (max-width:800px){.portfolio-grid{grid-template-columns:1fr;}}
.project-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.project-thumb{
  aspect-ratio:16/9;background:repeating-linear-gradient(135deg,#efe6d6,#efe6d6 10px,#e6dbc7 10px,#e6dbc7 20px);
  display:flex;align-items:center;justify-content:center;color:#9a8f7a;font-size:.8rem;font-weight:700;text-align:center;padding:12px;
  overflow:hidden;
}
.project-thumb img,.project-thumb video{width:100%;height:100%;object-fit:cover;background:#000;}
.project-thumb img.contain{object-fit:contain;background:#1c1712;}
.project-body{padding:22px;}
.project-body .subtitle{font-size:.78rem;color:var(--ember-dark);font-weight:700;text-transform:uppercase;letter-spacing:.06em;}
.project-body h4{margin:8px 0 8px;font-size:1.05rem;}
.project-body p{color:var(--ink-soft);font-size:.92rem;}
.project-body a{font-weight:700;font-size:.88rem;text-decoration:none;color:var(--ember);}

/* comparison cta strip */
.compare-strip{
  border-radius:var(--radius);
  background:linear-gradient(120deg,var(--ember) 0%,var(--ember-dark) 100%);
  color:#fff;padding:36px 44px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
.compare-strip h3{margin:0;font-size:1.25rem;}
.compare-strip .btn-outline{border-color:#fff;color:#fff;}
.compare-strip .btn-outline:hover{background:#fff;color:var(--ember-dark);}

/* modular system */
.system-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:44px;}
.system-cols{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-top:28px;}
@media (max-width:800px){.system-cols{grid-template-columns:1fr;}}
.chip-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px;}
.chip-list li{background:var(--paper-alt);padding:8px 14px;border-radius:999px;font-size:.85rem;font-weight:600;}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px;}
@media (max-width:700px){.stat-row{grid-template-columns:1fr;}}
.stat{background:var(--paper-alt);border-radius:12px;padding:20px;text-align:center;}
.stat .num{font-size:1.6rem;font-weight:800;color:var(--ember-dark);}
.stat .label{font-size:.8rem;color:var(--ink-soft);}

/* modular photo gallery */
.modular-gallery{
  margin-top:24px;
  display:grid;
  grid-template-columns:repeat(6,1fr);
  grid-auto-rows:110px;
  grid-auto-flow:dense;
  gap:8px;
}
.modular-gallery .g-item{
  position:relative;grid-column:span 2;grid-row:span 2;
  border-radius:10px;overflow:hidden;border:1px solid var(--line);
  background:var(--paper-alt);cursor:zoom-in;padding:0;display:block;width:100%;height:100%;
}
.modular-gallery .g-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .35s ease;}
.modular-gallery .g-item:hover img{transform:scale(1.06);}
.modular-gallery .g-item.g-wide{grid-column:span 4;}
.modular-gallery .g-item.g-tall{grid-row:span 4;}
.modular-gallery .g-item.g-big{grid-column:span 4;grid-row:span 4;}
.modular-gallery .g-item.g-half{grid-column:span 3;grid-row:span 4;}
.modular-gallery .g-item .g-cap{
  position:absolute;left:0;right:0;bottom:0;padding:8px 10px 6px;
  font-size:.72rem;color:#fff;background:linear-gradient(0deg,rgba(0,0,0,.62),rgba(0,0,0,0));
  opacity:0;transition:opacity .2s ease;text-align:left;
}
.modular-gallery .g-item:hover .g-cap{opacity:1;}
@media (max-width:900px){
  .modular-gallery{grid-template-columns:repeat(4,1fr);grid-auto-rows:90px;}
  .modular-gallery .g-item.g-big,
  .modular-gallery .g-item.g-half{grid-column:span 4;grid-row:span 4;}
}
@media (max-width:560px){
  .modular-gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:130px;}
  .modular-gallery .g-item,
  .modular-gallery .g-item.g-wide,
  .modular-gallery .g-item.g-big,
  .modular-gallery .g-item.g-half{grid-column:span 2;grid-row:span 2;}
}

.g-lightbox{
  display:none;position:fixed;inset:0;z-index:80;background:rgba(20,16,12,.92);
  align-items:center;justify-content:center;padding:28px;
}
.g-lightbox.open{display:flex;}
.g-lightbox img{max-width:min(92vw,1100px);max-height:86vh;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5);}
.g-lightbox .g-close{
  position:absolute;top:18px;right:22px;width:40px;height:40px;border-radius:50%;
  border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08);color:#fff;
  font-size:1.2rem;line-height:1;cursor:pointer;
}
.g-lightbox .g-close:hover{background:rgba(255,255,255,.18);}
.g-lightbox .g-cap{position:absolute;left:0;right:0;bottom:18px;text-align:center;color:#fff;font-size:.85rem;opacity:.85;padding:0 20px;}

/* process */
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media (max-width:900px){.process-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:600px){.process-grid{grid-template-columns:1fr;}}
.process-step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;}
.process-step .step-num{font-size:.78rem;font-weight:800;color:var(--ember-dark);letter-spacing:.08em;}
.process-step p{margin:8px 0 0;font-size:.92rem;color:var(--ink-soft);}

/* articles */
.articles-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
@media (max-width:800px){.articles-grid{grid-template-columns:1fr;}}
.article-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;text-decoration:none;color:inherit;display:block;transition:box-shadow .15s ease, transform .15s ease;}
.article-card:hover{box-shadow:0 10px 26px rgba(28,23,18,.08);transform:translateY(-2px);}
.article-card .num{font-size:.78rem;font-weight:800;color:var(--ember-dark);}
.article-card h4{font-size:1.05rem;margin:8px 0;}
.article-card p{font-size:.9rem;color:var(--ink-soft);margin:0;}
.article-card .cta{display:inline-block;margin-top:12px;font-weight:700;font-size:.85rem;color:var(--ember);}

/* final cta */
.final-cta{
  border-radius:var(--radius);
  background:var(--char);color:#fff;text-align:center;padding:64px 24px;
}
.final-cta h2{color:#fff;}
.final-cta p{color:#cbbfaf;}
.final-cta .btn-row{justify-content:center;}

/* footer */
footer.site{border-top:1px solid var(--line);padding:48px 0 32px;font-size:.9rem;color:var(--ink-soft);}
.footer-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;}
.footer-grid a{text-decoration:none;}
.footer-social{display:flex;gap:16px;flex-wrap:wrap;}
.footer-bottom{margin-top:24px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.8rem;}

/* mobile nav panel */
.mobile-panel{
  display:none;position:fixed;inset:0;z-index:50;background:var(--paper);padding:24px;
}
.mobile-panel.open{display:block;}
.mobile-panel .close{background:none;border:none;font-size:1.6rem;float:right;cursor:pointer;}
.mobile-panel nav{display:flex;flex-direction:column;gap:22px;font-size:1.2rem;font-weight:700;margin-top:60px;}
.mobile-panel a{text-decoration:none;}

/* cookie consent banner */
#cookie-banner{
  position:fixed;left:16px;right:16px;bottom:16px;z-index:100;
  max-width:640px;margin:0 auto;
  background:var(--char);color:#f4ede2;border-radius:14px;
  padding:22px 24px;box-shadow:0 18px 40px rgba(0,0,0,.3);
  display:none;
}
#cookie-banner.show{display:block;}
#cookie-banner p{font-size:.88rem;color:#d8cdbc;margin:0 0 14px;}
#cookie-banner .row{display:flex;gap:12px;flex-wrap:wrap;}
#cookie-banner .btn-primary{padding:10px 18px;font-size:.85rem;}
#cookie-banner .btn-ghost{background:transparent;border-color:#6b6053;color:#f4ede2;padding:10px 18px;font-size:.85rem;}
#cookie-banner a{color:#e0a06c;text-decoration:underline;}

/* article pages */
.article-hero{padding:56px 0 40px;border-bottom:1px solid var(--line);}
.breadcrumb{font-size:.85rem;font-weight:700;color:var(--ember-dark);text-decoration:none;display:inline-flex;align-items:center;gap:6px;margin-bottom:18px;}
.article-hero h1{font-size:clamp(1.7rem,3.2vw,2.4rem);max-width:20ch;}
.article-hero .lead{font-size:1.05rem;color:var(--ink-soft);max-width:62ch;}
.article-body{max-width:720px;margin:0 auto;padding:48px 0;}
.article-body h2{font-size:1.3rem;margin-top:2em;}
.article-body h2:first-child{margin-top:0;}
.article-body p{color:var(--ink-soft);font-size:1.02rem;}
.article-cta{max-width:720px;margin:0 auto 64px;background:var(--paper-alt);border-radius:var(--radius);padding:32px;text-align:center;}
.article-cta p{color:var(--ink-soft);margin-bottom:18px;}
.article-nav-footer{max-width:720px;margin:0 auto 40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:.85rem;font-weight:700;}
.article-nav-footer a{color:var(--ember);text-decoration:none;}

/* legal / privacy pages */
.legal-body{max-width:760px;margin:0 auto;}
.legal-body h1{font-size:2rem;margin-bottom:.3em;}
.legal-body .updated{color:var(--ink-soft);font-size:.85rem;margin-bottom:2em;}
.legal-body h2{font-size:1.2rem;margin-top:1.6em;}
.legal-body p,.legal-body li{color:var(--ink-soft);}

/* floating contact buttons */
.fab-stack{position:fixed;left:18px;bottom:18px;z-index:90;display:flex;flex-direction:column;gap:12px;}
.fab{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(0,0,0,.28);transition:transform .15s ease;text-decoration:none;}
.fab:hover,.fab:focus-visible{transform:scale(1.08);}
.fab svg{width:26px;height:26px;}
.fab-whatsapp{background:#25D366;}
.fab-telegram{background:#229ED9;}
@media (max-width:480px){.fab-stack{left:14px;bottom:14px;gap:10px;}.fab{width:46px;height:46px;}.fab svg{width:23px;height:23px;}}

/* tech-value statement block */
.tech-value{background:var(--paper-alt);}
.tech-value .container{max-width:760px;text-align:center;}
.tech-value h2{font-size:clamp(1.6rem,3.2vw,2.3rem);margin-bottom:.6em;}
.tech-value p{color:var(--ink-soft);font-size:1.05rem;max-width:60ch;margin:0 auto 1em;}

/* compare-strip: expanding comparison panel */
.compare-strip{transition:border-radius .25s ease;}
.compare-strip.panel-open{border-radius:var(--radius) var(--radius) 0 0;}
.compare-strip .btn-outline .chevron{display:inline-block;transition:transform .25s ease;}
.compare-strip .btn-outline[aria-expanded="true"] .chevron{transform:rotate(90deg);}
.compare-panel{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .35s ease;
  background:var(--card);border:1px solid var(--line);border-top:none;
  border-radius:0 0 var(--radius) var(--radius);
}
.compare-panel.is-open{grid-template-rows:1fr;}
.compare-panel-inner{overflow:hidden;}
.compare-panel-inner .article-body{padding:40px 0 8px;max-width:720px;}
.compare-panel-inner .article-body .lead{font-size:1.05rem;color:var(--ink-soft);max-width:62ch;margin-bottom:1.4em;}
.compare-panel-inner .article-body .kicker{font-weight:800;color:var(--ink);font-size:1.02rem;margin:0 0 1em;}
.compare-panel-inner .article-cta{margin:0 0 20px;}
.compare-toggle-collapse{
  display:flex;margin:4px 0 32px;background:none;border:none;color:var(--ember-dark);
  font:inherit;font-weight:700;font-size:.85rem;cursor:pointer;align-items:center;gap:6px;
}