/* ============================================
   POEMA — Mineral Art Coatings
   Official Website Stylesheet
   ============================================ */

:root {
  --mineral-black: #242628;
  --graphite: #6C6E70;
  --tech-graphite: #3A3D40;
  --stone-grey: #C8C8C8;
  --warm-white: #F5F3EF;
  --off-white: #FAFAF8;
  --it-green: #1F7A4C;
  --it-red: #C5332F;
  --gold: #9A8A6A;
  --nebbia: #BFC3C6;
  --serica: #A8A9AD;
  --sabbia: #C9B8A2;
  --ember: #7A4A3A;
  --sfumato: #E7E4DC;
  --pietra: #9A9C9F;
  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: 'Noto Sans TC', var(--font-body); color: var(--stone-grey); background: var(--mineral-black); line-height: 1.8; overflow-x: hidden; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* --- Layout --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.container-wide { max-width: 1440px; margin: 0 auto; padding: 0 32px; }
.section { padding: 120px 0; }
.section-light { background: var(--off-white); color: var(--mineral-black); }
.section-warm { background: var(--warm-white); color: var(--mineral-black); }
.text-center { text-align: center; }

/* --- Typography --- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 300; line-height: 1.2; letter-spacing: 0.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }

.section-label {
  font-size: 0.75rem; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--graphite); margin-bottom: 16px; font-weight: 500;
}
.section-light .section-label, .section-warm .section-label { color: var(--graphite); }

.subtitle { font-size: 1.05rem; color: var(--graphite); line-height: 1.9; max-width: 600px; }
.section-light .subtitle { color: var(--graphite); }

/* --- Identity Stripe --- */
.identity-stripe { display: flex; height: 3px; width: 120px; margin: 16px 0; }
.identity-stripe div { flex: 1; }
.identity-stripe .g { background: var(--it-green); }
.identity-stripe .w { background: #fff; }
.identity-stripe .r { background: var(--it-red); }
.identity-stripe-center { margin: 16px auto; }

/* --- Navigation --- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: var(--transition); }
.nav.scrolled { background: rgba(36,38,40,0.95); backdrop-filter: blur(12px); padding: 14px 0; }
.nav-inner { max-width: 1440px; margin: 0 auto; padding: 0 32px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; }
.nav-logo img { height: 28px; transition: var(--transition); }
.nav-logo-text { font-family: var(--font-body); font-size: 1.1rem; color: #fff; letter-spacing: 0.25em; font-weight: 300; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.6); transition: var(--transition); }
.nav-links a:hover { color: #fff; }
.nav-cta { color: #fff !important; border: 1px solid rgba(255,255,255,0.3); padding: 7px 18px; border-radius: 2px; }
.nav-cta:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.6); }
.nav-lang { font-size: 0.65rem; color: rgba(255,255,255,0.4); border: 1px solid rgba(255,255,255,0.15); padding: 4px 10px; border-radius: 2px; }
.nav-lang:hover { color: rgba(255,255,255,0.7); border-color: rgba(255,255,255,0.4); }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; }
.nav-hamburger span { width: 22px; height: 1.5px; background: #fff; transition: var(--transition); }

/* --- Hero --- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(36,38,40,0.85) 0%, rgba(36,38,40,0.4) 50%, rgba(36,38,40,0.6) 100%); }
.hero-content { position: relative; z-index: 1; padding: 0 32px; max-width: 700px; }
.hero-content .container { padding: 0; }
.hero h1 { color: #fff; margin-bottom: 16px; font-weight: 300; }
.hero h1 em { font-style: italic; color: var(--stone-grey); }
.hero .subtitle { color: rgba(255,255,255,0.5); margin-bottom: 40px; }
.hero-scroll { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 1; display: flex; flex-direction: column; align-items: center; gap: 8px; color: rgba(255,255,255,0.3); font-size: 0.6rem; letter-spacing: 0.2em; text-transform: uppercase; }
.hero-scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, rgba(255,255,255,0.3), transparent); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100% { opacity: 0.3; } 50% { opacity: 1; } }

/* --- Buttons --- */
.btn { display: inline-flex; align-items: center; gap: 8px; font-size: 0.72rem; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase; padding: 14px 32px; border-radius: 2px; transition: var(--transition); }
.btn-white { border: 1px solid rgba(255,255,255,0.3); color: #fff; }
.btn-white:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.6); }
.btn-dark { border: 1px solid var(--mineral-black); color: var(--mineral-black); }
.btn-dark:hover { background: var(--mineral-black); color: #fff; }
.btn-arrow::after { content: '\2192'; transition: transform var(--transition); }
.btn-arrow:hover::after { transform: translateX(4px); }

/* --- Brand Statement --- */
.brand-statement { padding: 120px 0; text-align: center; }
.brand-statement h2 { color: #fff; max-width: 700px; margin: 0 auto 24px; }
.brand-statement h2 em { font-style: italic; color: var(--stone-grey); }

/* --- Split Section --- */
.split { display: grid; grid-template-columns: 1fr 1fr; min-height: 600px; }
.split-image { overflow: hidden; }
.split-image img { width: 100%; height: 100%; object-fit: cover; }
.split-content { display: flex; flex-direction: column; justify-content: center; padding: 80px 64px; }

/* --- Material Cards --- */
.material-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.material-card { position: relative; aspect-ratio: 4/3; overflow: hidden; cursor: pointer; }
.material-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.material-card:hover img { transform: scale(1.05); }
.material-card-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 32px; background: linear-gradient(to top, rgba(36,38,40,0.85), transparent); }
.material-card-name { font-family: var(--font-display); font-size: 1.4rem; color: #fff; }
.material-card-sub { font-size: 0.75rem; color: rgba(255,255,255,0.5); letter-spacing: 0.08em; margin-top: 4px; }

/* --- Product Grid --- */
.product-showcase { position: relative; }
.product-showcase img { width: 100%; border-radius: 2px; }

/* --- Vessel Gallery --- */
.vessel-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.vessel-item { aspect-ratio: 3/4; overflow: hidden; border-radius: 2px; }
.vessel-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.vessel-item:hover img { transform: scale(1.05); }

/* --- Feature Icons --- */
.features-row { display: flex; justify-content: center; gap: 56px; padding: 60px 0; flex-wrap: wrap; }
.feature-item { text-align: center; }
.feature-item img { width: 40px; height: 40px; margin: 0 auto 10px; opacity: 0.7; }
.feature-item span { font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--graphite); display: block; }

/* --- Certification --- */
.cert-ladder { max-width: 800px; margin: 0 auto; }
.cert-level { display: flex; align-items: center; gap: 24px; padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.cert-badge { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--graphite); display: flex; align-items: center; justify-content: center; font-size: 0.7rem; color: var(--graphite); flex-shrink: 0; }
.cert-level:first-child .cert-badge { border-color: var(--gold); color: var(--gold); }
.cert-name { font-family: var(--font-display); font-size: 1.1rem; color: #fff; }
.cert-desc { font-size: 0.8rem; color: var(--graphite); }

/* --- Footer --- */
.footer { background: var(--mineral-black); border-top: 1px solid rgba(255,255,255,0.06); padding: 80px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 60px; }
.footer-brand-name { font-family: var(--font-body); font-size: 1rem; letter-spacing: 0.25em; text-transform: uppercase; color: #fff; margin-bottom: 12px; }
.footer-brand-desc { font-size: 0.8rem; color: var(--graphite); line-height: 1.7; margin-bottom: 20px; }
.footer-col h4 { font-size: 0.65rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--graphite); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.8rem; color: rgba(255,255,255,0.35); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: #fff; }
.footer-bar { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; }
.footer-bar span { font-size: 0.7rem; color: rgba(255,255,255,0.2); }

/* --- CTA Section --- */
.cta-section { position: relative; min-height: 400px; display: flex; align-items: center; justify-content: center; text-align: center; }
.cta-section-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.cta-section-bg::after { content: ''; position: absolute; inset: 0; background: rgba(36,38,40,0.75); }
.cta-section-content { position: relative; z-index: 1; }

/* --- Fade In --- */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.8s ease, transform 0.8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-d1 { transition-delay: 0.1s; }
.fade-in-d2 { transition-delay: 0.2s; }
.fade-in-d3 { transition-delay: 0.3s; }

/* --- Contact Form --- */
.contact-form { max-width: 560px; margin: 0 auto; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--graphite); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid rgba(255,255,255,0.1); border-radius: 2px;
  font-family: var(--font-body); font-size: 0.85rem; background: rgba(255,255,255,0.03); color: #fff; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: rgba(255,255,255,0.3); }
.form-group textarea { min-height: 100px; resize: vertical; }
.section-light .form-group input, .section-light .form-group select, .section-light .form-group textarea {
  background: #fff; color: var(--mineral-black); border-color: #ddd;
}

/* --- Technical Data Section --- */
.tds-section{padding:100px 0;border-top:1px solid rgba(255,255,255,0.06)}
.tds-section .container{max-width:900px;margin:0 auto;padding:0 32px}
.tds-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:40px;flex-wrap:wrap;gap:16px}
.tds-header h2{color:#fff;margin:0}
.tds-badge{font-size:0.65rem;letter-spacing:0.12em;text-transform:uppercase;color:var(--it-green);border:1px solid rgba(31,122,76,0.3);padding:6px 14px;border-radius:2px}
.tds-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid rgba(255,255,255,0.08);border-radius:2px;overflow:hidden}
.tds-row{display:flex;justify-content:space-between;align-items:flex-start;padding:14px 20px;border-bottom:1px solid rgba(255,255,255,0.06);font-size:0.9rem}
.tds-row:last-child{border-bottom:none}
.tds-label{color:var(--graphite);font-size:0.8rem;text-transform:uppercase;letter-spacing:0.08em;font-weight:500;min-width:140px}
.tds-value{color:var(--stone-grey);text-align:right;flex:1;padding-left:16px}
.tds-full{grid-column:1/-1}
.tds-composition{padding:20px;border-bottom:1px solid rgba(255,255,255,0.06);font-size:0.9rem;color:var(--stone-grey);line-height:1.8;grid-column:1/-1}
.tds-composition strong{color:#fff;font-weight:400}
.tds-methods{grid-column:1/-1;padding:20px}
.tds-methods h4{font-family:var(--font-body);font-size:0.8rem;text-transform:uppercase;letter-spacing:0.1em;color:var(--graphite);margin-bottom:12px}
.tds-methods ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.tds-methods li{font-size:0.85rem;color:var(--stone-grey);padding:6px 14px;border:1px solid rgba(255,255,255,0.08);border-radius:2px}
.tds-download{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap}
.tds-download a{display:inline-flex;align-items:center;gap:8px;font-size:0.8rem;letter-spacing:0.1em;text-transform:uppercase;color:var(--stone-grey);border:1px solid rgba(255,255,255,0.12);padding:10px 20px;border-radius:2px;transition:var(--transition)}
.tds-download a:hover{border-color:rgba(255,255,255,0.3);color:#fff;background:rgba(255,255,255,0.03)}

@media(max-width:768px){.tds-grid{grid-template-columns:1fr}}

/* --- Product Page --- */
.product-hero{position:relative;min-height:80vh;display:flex;align-items:center;overflow:hidden}
.product-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center}
.product-hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(to right,rgba(36,38,40,0.75) 0%,rgba(36,38,40,0.3) 50%,rgba(36,38,40,0.1) 100%)}
.product-hero-content{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.product-hero h1{font-family:var(--font-display);font-size:clamp(3rem,6vw,5rem);color:#fff;font-weight:300;letter-spacing:0.04em;margin-bottom:8px}
.product-hero .product-cn{font-size:clamp(1rem,2vw,1.3rem);color:var(--graphite);margin-bottom:16px;letter-spacing:0.08em}
.product-hero .product-tagline{font-family:var(--font-display);font-size:clamp(1.1rem,2vw,1.5rem);color:rgba(255,255,255,0.5);font-style:italic;font-weight:300;margin-bottom:24px}
.product-hero .product-oneliner{font-size:1rem;color:var(--stone-grey);margin-bottom:24px;max-width:500px;line-height:1.8}
.product-hero .identity-stripe{margin:0}
.product-hero-image{position:absolute;right:80px;bottom:-20px;width:320px;z-index:2;filter:drop-shadow(0 20px 40px rgba(0,0,0,0.4))}

.material-character{padding:120px 0}
.material-character .container{max-width:800px;margin:0 auto;padding:0 32px}
.material-character p{font-size:1.1rem;color:var(--stone-grey);line-height:2.1;margin-bottom:24px}

.problem-section{padding:80px 0;border-top:1px solid rgba(255,255,255,0.06)}
.problem-section .container{max-width:800px;margin:0 auto;padding:0 32px}
.problem-section .problem-text{font-size:1.1rem;color:#fff;line-height:2;margin-bottom:0;font-weight:300}

.tech-profile{padding:100px 0;border-top:1px solid rgba(255,255,255,0.06)}
.tech-profile .container{max-width:900px;margin:0 auto;padding:0 32px}
.tech-table{width:100%;border-collapse:collapse;margin-top:40px}
.tech-table tr{border-bottom:1px solid rgba(255,255,255,0.06)}
.tech-table td{padding:16px 0;font-size:0.85rem;vertical-align:top}
.tech-table td:first-child{color:var(--graphite);text-transform:uppercase;letter-spacing:0.12em;font-size:0.7rem;width:160px;font-weight:500}
.tech-table td:last-child{color:var(--stone-grey)}

.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;margin-top:40px}
.spec-grid .spec-item{display:flex;justify-content:space-between;padding:14px 20px;border-bottom:1px solid rgba(255,255,255,0.06);font-size:0.85rem}
.spec-grid .spec-item:nth-child(odd){border-right:1px solid rgba(255,255,255,0.06)}
.spec-grid .spec-label{color:var(--graphite);font-size:0.8rem;text-transform:uppercase;letter-spacing:0.1em;font-weight:500}
.spec-grid .spec-value{color:var(--stone-grey);text-align:right;font-size:0.95rem}

.application-section{padding:100px 0;border-top:1px solid rgba(255,255,255,0.06)}
.application-section .container{max-width:800px;margin:0 auto;padding:0 32px}
.application-section p{font-size:1rem;color:var(--stone-grey);line-height:1.9}

.design-info{padding:80px 0;border-top:1px solid rgba(255,255,255,0.06)}
.design-info .container{max-width:900px;margin:0 auto;padding:0 32px}
.info-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.info-card{padding:28px 24px;border:1px solid rgba(255,255,255,0.06);border-radius:2px}
.info-card h4{font-family:var(--font-body);font-size:0.7rem;text-transform:uppercase;letter-spacing:0.12em;color:var(--graphite);margin-bottom:12px}
.info-card p{font-size:0.9rem;color:var(--stone-grey);line-height:1.8;margin:0}

.system-section{padding:100px 0;border-top:1px solid rgba(255,255,255,0.06)}
.system-section .container{max-width:800px;margin:0 auto;padding:0 32px}
.system-section p{font-size:1rem;color:var(--stone-grey);line-height:1.9}
.system-badge{display:inline-block;font-size:0.65rem;letter-spacing:0.15em;text-transform:uppercase;color:var(--graphite);border:1px solid rgba(255,255,255,0.1);padding:6px 16px;border-radius:2px;margin-top:16px}
.system-layers{margin-top:32px;display:flex;flex-direction:column;gap:0}
.system-layer{display:flex;align-items:center;gap:16px;padding:16px 20px;border:1px solid rgba(255,255,255,0.06);border-bottom:none;font-size:0.85rem}
.system-layer:last-child{border-bottom:1px solid rgba(255,255,255,0.06)}
.system-layer .layer-num{width:28px;height:28px;border-radius:50%;border:1px solid var(--graphite);display:flex;align-items:center;justify-content:center;font-size:0.65rem;color:var(--graphite);flex-shrink:0}
.system-layer .layer-name{color:#fff;font-weight:400}
.system-layer .layer-desc{color:var(--graphite);margin-left:auto;font-size:0.8rem}
.system-layer.current{background:rgba(255,255,255,0.03)}
.system-layer.current .layer-num{border-color:var(--it-green);color:var(--it-green)}

.download-section{padding:80px 0;border-top:1px solid rgba(255,255,255,0.06)}
.download-section .container{max-width:800px;margin:0 auto;padding:0 32px}
.download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:32px}
.download-item{display:flex;align-items:center;gap:12px;padding:16px 20px;border:1px solid rgba(255,255,255,0.08);border-radius:2px;color:var(--stone-grey);font-size:0.85rem;transition:var(--transition);cursor:pointer}
.download-item:hover{border-color:rgba(255,255,255,0.2);background:rgba(255,255,255,0.02)}
.download-item .dl-icon{font-size:1.1rem;opacity:0.5}
.download-item .dl-label{flex:1}
.download-item .dl-badge{font-size:0.6rem;text-transform:uppercase;letter-spacing:0.1em;color:var(--graphite);border:1px solid rgba(255,255,255,0.1);padding:3px 8px;border-radius:2px}

.product-cta{padding:100px 0;text-align:center;border-top:1px solid rgba(255,255,255,0.06)}
.product-cta h2{color:#fff;margin-bottom:12px}
.product-cta p{color:var(--graphite);margin:0 auto 32px;font-size:0.95rem}
.product-cta .btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

.cta-triple{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;max-width:900px;margin:48px auto 0;text-align:left}
.cta-card{padding:32px 28px;border:1px solid rgba(255,255,255,0.08);border-radius:2px}
.cta-card h4{font-family:var(--font-body);font-size:0.7rem;text-transform:uppercase;letter-spacing:0.12em;color:var(--graphite);margin-bottom:16px}
.cta-card ul{list-style:none;padding:0;margin:0}
.cta-card li{padding:6px 0;font-size:0.85rem}
.cta-card li a{color:var(--stone-grey);transition:var(--transition)}
.cta-card li a:hover{color:#fff}

/* --- Product Card Grid (Homepage) --- */
.product-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.product-card{position:relative;padding:40px 28px 32px;border:1px solid rgba(255,255,255,0.08);border-radius:2px;transition:var(--transition);display:flex;flex-direction:column}
.product-card:hover{border-color:rgba(255,255,255,0.2);background:rgba(255,255,255,0.02)}
.product-card .pc-system{font-size:0.6rem;text-transform:uppercase;letter-spacing:0.15em;color:var(--graphite);margin-bottom:8px}
.product-card .pc-name{font-family:var(--font-display);font-size:1.4rem;color:#fff;margin-bottom:4px}
.product-card .pc-cn{font-size:0.85rem;color:var(--graphite);margin-bottom:12px}
.product-card .pc-desc{font-size:0.85rem;color:var(--stone-grey);line-height:1.7;flex:1}
.product-card .pc-link{display:inline-flex;align-items:center;gap:6px;font-size:0.7rem;text-transform:uppercase;letter-spacing:0.12em;color:rgba(255,255,255,0.5);margin-top:16px;transition:var(--transition)}
.product-card .pc-link:hover{color:#fff}
.product-card .pc-link::after{content:'\2192';transition:transform var(--transition)}
.product-card .pc-link:hover::after{transform:translateX(4px)}
.product-card .pc-color{position:absolute;top:0;left:0;right:0;height:3px;border-radius:2px 2px 0 0}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; }
  .material-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .vessel-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .nav-links { display: none; position: fixed; inset: 0; background: rgba(36,38,40,0.98); flex-direction: column; justify-content: center; align-items: center; gap: 20px; }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }
  .split-content { padding: 48px 24px; }
  .material-grid { grid-template-columns: 1fr; }
  .vessel-grid { grid-template-columns: repeat(2, 1fr); }
  .features-row { gap: 32px; flex-wrap: wrap; justify-content: center; }
  .feature-item { min-width: 80px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bar { flex-direction: column; gap: 8px; }
  .container { padding: 0 20px; }
  .container-wide { padding: 0; }
  .product-hero-image{position:static;width:200px;margin:32px auto 0;display:block}
  .spec-grid{grid-template-columns:1fr}
  .spec-grid .spec-item:nth-child(odd){border-right:none}
  .info-cards{grid-template-columns:1fr}
  .download-grid{grid-template-columns:1fr}
  .cta-triple{grid-template-columns:1fr;gap:20px}
  .product-card-grid{grid-template-columns:1fr}
  /* product card grid on mobile: 2 columns */
  .container-wide > div[style*="grid-template-columns:repeat(3"] { grid-template-columns: repeat(2, 1fr) !important; }
  .material-card-sub { font-size: 0.7rem; }
  /* hero text sizing */
  h1 { font-size: 2.5rem !important; }
  .hero-content .subtitle { font-size: 0.95rem; }
  /* space split stack */
  .space-split { grid-template-columns: 1fr; }
  .space-split-content { padding: 40px 24px; }
}