:root {
    --steel: #121A2C;
    --gold: #7A2748;
    --amber: #C8953B;
    --mist: #F6F3F0;
    --slate: #263044;
    --warm-white: #FAFAF8;
    --ink: #0A0A0A;
    --crimson: #8B2020;
    --gold-light: #EAD7DE;
    --steel-light: #232B46;
    --brand-bright: #A83A61;
    --brand-on-dark: #F0A6BF;
    --brand-on-dark-soft: #FFE2EC;
    --graphite: #202734;
    --asphalt: #2B2F33;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body { font-family: 'Inter', sans-serif; background: var(--warm-white); color: var(--ink); overflow-x: hidden; }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(28,43,58,0.97); backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(122,39,72,0.2);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 4rem; height: 68px;
  }
  .nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
  .brand-logo {
    display: block;
    width: 182px;
    height: auto;
  }
  .brand-logo-light {
    filter: drop-shadow(0 1px 0 rgba(0,0,0,0.18));
  }
  .nav-logo-mark {
    width: 38px; height: 38px; background: var(--gold);
    display: flex; align-items: center; justify-content: center;
    font-family: 'IBM Plex Sans', sans-serif; font-weight: 900;
    font-size: 18px; color: white; letter-spacing: -1px;
  }
  .nav-logo-text { font-family: 'Inter', sans-serif; font-weight: 600; font-size: 15px; color: white; letter-spacing: 0.5px; }
  .nav-logo-sub { font-size: 10px; color: rgba(122,39,72,0.8); font-family: 'IBM Plex Mono', monospace; letter-spacing: 2px; text-transform: uppercase; }
  .nav-links { display: flex; gap: 2rem; list-style: none; }
  .nav-links a { color: rgba(255,255,255,0.75); text-decoration: none; font-size: 14px; font-weight: 500; letter-spacing: 0.3px; transition: color 0.2s; }
  .nav-links a:hover { color: var(--brand-on-dark); }
  .nav-cta {
    background: var(--gold); color: white; border: none;
    padding: 10px 22px; font-family: 'Inter', sans-serif; font-weight: 600;
    font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
    cursor: pointer; transition: background 0.2s; text-decoration: none; display: inline-block;
  }
  .nav-cta:hover { background: var(--brand-bright); }

  /* PAGE SYSTEM */
  .page { display: none; }
  .page.active { display: block; }

  /* ============ HOME PAGE ============ */

  /* HERO */
  .hero {
    min-height: 100vh; background: var(--steel);
    display: flex; flex-direction: column; justify-content: center;
    padding: 120px 4rem 80px; position: relative; overflow: hidden;
  }
  .hero::before {
    content: ''; position: absolute; top: 0; right: 0; bottom: 0;
    width: 45%;
    background: linear-gradient(135deg, #2e4259 0%, #1C2B3A 60%);
    clip-path: polygon(15% 0, 100% 0, 100% 100%, 0% 100%);
  }
  .hero::after {
    content: ''; position: absolute; right: 5%; top: 50%; transform: translateY(-50%);
    width: 320px; height: 320px;
    border: 1px solid rgba(122,39,72,0.15); border-radius: 50%;
  }
  .hero-grid {
    position: absolute; inset: 0; opacity: 0.03;
    background-image: linear-gradient(rgba(122,39,72,1) 1px, transparent 1px),
      linear-gradient(90deg, rgba(122,39,72,1) 1px, transparent 1px);
    background-size: 60px 60px;
  }
  .hero-tag {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold);
    letter-spacing: 3px; text-transform: uppercase; margin-bottom: 2rem;
    position: relative; z-index: 1;
  }
  .hero h1 {
    font-family: 'IBM Plex Sans', sans-serif; font-weight: 900;
    font-size: clamp(42px, 5vw, 72px); color: white; line-height: 1.05;
    max-width: 700px; position: relative; z-index: 1; margin-bottom: 1.5rem;
  }
  .hero h1 span { color: #B44A6E; }
  .hero-sub {
    font-size: 17px; color: rgba(255,255,255,0.65); max-width: 560px;
    line-height: 1.75; position: relative; z-index: 1; margin-bottom: 2.5rem;
    font-weight: 300;
  }
  .hero-btns { display: flex; gap: 1rem; position: relative; z-index: 1; flex-wrap: wrap; }
  .btn-primary {
    background: var(--gold); color: white; border: none;
    padding: 16px 32px; font-family: 'Inter', sans-serif; font-weight: 600;
    font-size: 14px; letter-spacing: 1.5px; text-transform: uppercase;
    cursor: pointer; transition: all 0.2s; text-decoration: none; display: inline-block;
  }
  .btn-primary:hover { background: var(--brand-bright); transform: translateY(-1px); }
  .btn-ghost {
    background: transparent; color: white; border: 1px solid rgba(255,255,255,0.3);
    padding: 16px 32px; font-family: 'Inter', sans-serif; font-weight: 500;
    font-size: 14px; letter-spacing: 1.5px; text-transform: uppercase;
    cursor: pointer; transition: all 0.2s; text-decoration: none; display: inline-block;
  }
  .btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
  .hero-trust {
    position: relative; z-index: 1; margin-top: 3rem;
    font-family: 'IBM Plex Mono', monospace; font-size: 11px;
    color: rgba(255,255,255,0.4); letter-spacing: 1px;
    display: flex; gap: 2rem; flex-wrap: wrap;
  }
  .hero-trust span::before { content: '◆ '; color: var(--gold); }

  /* PSU STRIP */
  .psu-strip {
    background: var(--asphalt); padding: 14px 0; overflow: hidden;
    border-top: 2px solid var(--amber);
  }
  .psu-inner {
    display: flex; gap: 4rem; white-space: nowrap;
    animation: marquee 30s linear infinite;
  }
  .psu-item {
    font-family: 'IBM Plex Mono', monospace; font-size: 12px;
    color: rgba(255,255,255,0.8); letter-spacing: 1px; font-weight: 500; flex-shrink: 0;
  }
  .psu-item::before { content: '◆ '; color: var(--amber); opacity: 0.9; }
  @keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

  /* STATS */
  .stats-strip {
    background: var(--steel); padding: 60px 4rem;
    display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px;
  }
  .stat-item {
    text-align: center; padding: 2rem 1rem;
    border-right: 1px solid rgba(122,39,72,0.15);
  }
  .stat-item:last-child { border-right: none; }
  .stat-num {
    font-family: 'IBM Plex Sans', sans-serif; font-size: 42px; font-weight: 900;
    color: var(--amber); display: block; line-height: 1;
  }
  .stat-label {
    font-family: 'IBM Plex Mono', monospace; font-size: 10px;
    color: rgba(255,255,255,0.45); letter-spacing: 2px; text-transform: uppercase;
    display: block; margin-top: 8px;
  }

  /* PRODUCT GRID */
  .section { padding: 100px 4rem; }
  .section-tag {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold);
    letter-spacing: 3px; text-transform: uppercase; margin-bottom: 1rem; display: block;
  }
  .section-title {
    font-family: 'IBM Plex Sans', sans-serif; font-size: clamp(32px,3.5vw,52px);
    font-weight: 700; color: var(--ink); line-height: 1.1; margin-bottom: 1rem;
  }
  .section-sub { font-size: 16px; color: #555; line-height: 1.75; max-width: 640px; margin-bottom: 3rem; }
  .section-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 3rem; flex-wrap: wrap; gap: 1rem; }
  .view-all { font-size: 14px; color: var(--gold); text-decoration: none; font-weight: 600; letter-spacing: 0.5px; border-bottom: 1px solid var(--gold); padding-bottom: 2px; }

  .product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: #e0ddd5; }
  .product-card {
    background: var(--warm-white); padding: 2rem 1.75rem;
    transition: all 0.25s; cursor: pointer; position: relative; overflow: hidden;
    text-decoration: none; display: block; color: inherit;
  }
  .product-card::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
    background: var(--gold); transform: scaleX(0); transform-origin: left;
    transition: transform 0.3s;
  }
  .product-card:hover { background: #fff; transform: translateY(-2px); }
  .product-card:hover::after { transform: scaleX(1); }
  .product-icon {
    width: 44px; height: 44px; margin-bottom: 1.25rem;
    display: flex; align-items: center; justify-content: center;
  }
  .product-icon svg { width: 44px; height: 44px; }
  .product-name { font-family: 'Inter', sans-serif; font-weight: 600; font-size: 17px; color: var(--steel); margin-bottom: 0.5rem; }
  .product-grades { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold); letter-spacing: 1px; margin-bottom: 0.75rem; }
  .product-desc { font-size: 14px; color: #666; line-height: 1.6; }

  /* USP */
  .usp-section { background: var(--mist); padding: 100px 4rem; }
  .usp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
  .usp-quote {
    font-family: 'IBM Plex Sans', sans-serif; font-size: clamp(28px,3vw,44px);
    font-weight: 700; color: var(--steel); line-height: 1.2;
  }
  .usp-quote span { color: var(--gold); }
  .usp-list { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
  .usp-item { display: flex; gap: 1rem; align-items: flex-start; }
  .usp-num {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold);
    letter-spacing: 2px; min-width: 28px; margin-top: 3px;
  }
  .usp-text h4 { font-size: 15px; font-weight: 600; color: var(--steel); margin-bottom: 0.3rem; }
  .usp-text p { font-size: 14px; color: #666; line-height: 1.6; }

  /* INDUSTRIES */
  .industries-section { padding: 100px 4rem; background: var(--steel); }
  .industries-section .section-title { color: white; }
  .industries-section .section-tag { color: var(--gold); }
  .industries-grid { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 2.5rem; }
  .industry-tag {
    background: rgba(255,255,255,0.06); border: 1px solid rgba(122,39,72,0.2);
    color: rgba(255,255,255,0.75); padding: 10px 20px;
    font-size: 14px; font-weight: 500; letter-spacing: 0.3px;
    transition: all 0.2s; cursor: default;
  }
  .industry-tag:hover { background: rgba(122,39,72,0.1); border-color: var(--gold); color: white; }

  /* CASES */
  .cases-section { padding: 100px 4rem; }
  .cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: #e0ddd5; margin-top: 0; }
  .case-card { background: white; padding: 2.5rem 2rem; position: relative; overflow: hidden; }
  .case-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%;
    background: var(--gold);
  }
  .case-num {
    font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold);
    letter-spacing: 2px; margin-bottom: 1rem; display: block;
  }
  .case-title { font-family: 'IBM Plex Sans', sans-serif; font-size: 20px; font-weight: 700; color: var(--steel); margin-bottom: 1rem; }
  .case-desc { font-size: 14px; color: #666; line-height: 1.7; }
  .case-highlight {
    margin-top: 1.5rem; padding: 1rem; background: var(--mist);
    font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--steel); font-weight: 500;
  }

  /* CTA BANNER */
  .cta-banner { background: var(--steel); padding: 80px 4rem; text-align: center; position: relative; overflow: hidden; }
  .cta-banner::before {
    content: ''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
    width: 600px; height: 600px; border: 1px solid rgba(122,39,72,0.08); border-radius: 50%;
  }
  .cta-banner h2 { font-family: 'IBM Plex Sans', sans-serif; font-size: 40px; font-weight: 700; color: white; margin-bottom: 1rem; position: relative; z-index: 1; }
  .cta-banner p { font-size: 17px; color: rgba(255,255,255,0.6); margin-bottom: 2.5rem; max-width: 600px; margin-left: auto; margin-right: auto; line-height: 1.7; position: relative; z-index: 1; }
  .cta-banner-btns { display: flex; gap: 1rem; justify-content: center; position: relative; z-index: 1; flex-wrap: wrap; }

  /* FOOTER */
  footer { background: #0d1a24; padding: 60px 4rem 30px; }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
  .footer-brand p { font-size: 14px; color: rgba(255,255,255,0.62); line-height: 1.7; margin-top: 1rem; max-width: 280px; }
  .footer-brand .brand-logo { width: 190px; margin-bottom: 1rem; }
  .footer-col h5 { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--brand-on-dark); letter-spacing: 2px; text-transform: uppercase; font-weight: 700; margin-bottom: 1.25rem; }
  .footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.64); text-decoration: none; margin-bottom: 0.6rem; transition: color 0.2s; }
  .footer-col a:hover { color: white; }
  .footer-bottom { border-top: 1px solid rgba(255,255,255,0.07); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
  .footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.42); }
  .footer-gst { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: rgba(255,255,255,0.36); }

  /* ============ ABOUT PAGE ============ */
  .page-hero {
    background: var(--steel); padding: 160px 4rem 80px; position: relative; overflow: hidden;
  }
  .page-hero::before {
    content: ''; position: absolute; right: -100px; top: -100px;
    width: 500px; height: 500px; border: 1px solid rgba(122,39,72,0.08); border-radius: 50%;
  }
  .page-hero-tag { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--gold); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 1.5rem; display: block; }
  .page-hero h1 { font-family: 'IBM Plex Sans', sans-serif; font-size: clamp(38px,4vw,60px); font-weight: 900; color: white; line-height: 1.1; max-width: 700px; }
  .page-hero p { font-size: 17px; color: rgba(255,255,255,0.55); max-width: 560px; line-height: 1.75; margin-top: 1.5rem; font-weight: 300; }

  .about-intro { padding: 80px 4rem; }
  .about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: start; }
  .big-quote {
    font-family: 'IBM Plex Sans', sans-serif; font-size: clamp(22px, 2.5vw, 34px);
    font-weight: 700; color: var(--steel); line-height: 1.3; border-left: 4px solid var(--gold);
    padding-left: 2rem;
  }
  .about-body { font-size: 15px; color: #555; line-height: 1.85; }
  .about-body p { margin-bottom: 1.25rem; }

  .vision-section { background: var(--mist); padding: 80px 4rem; }
  .vvm-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: #d8d4c8; margin-top: 3rem; }
  .vvm-card { background: white; padding: 2.5rem 2rem; }
  .vvm-card h3 { font-family: 'Inter', sans-serif; font-size: 11px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); margin-bottom: 1.5rem; }
  .vvm-card p { font-size: 15px; color: var(--steel); line-height: 1.75; font-style: italic; font-family: 'IBM Plex Sans', sans-serif; }

  .milestones { padding: 80px 4rem; }
  .timeline { position: relative; margin-top: 3rem; }
  .timeline::before { content: ''; position: absolute; left: 120px; top: 0; bottom: 0; width: 1px; background: #e0ddd5; }
  .timeline-item { display: grid; grid-template-columns: 120px 1fr; gap: 3rem; margin-bottom: 3rem; position: relative; }
  .timeline-year { font-family: 'IBM Plex Sans', sans-serif; font-size: 22px; font-weight: 700; color: var(--gold); text-align: right; padding-top: 2px; }
  .timeline-dot { position: absolute; left: 113px; top: 8px; width: 15px; height: 15px; border: 2px solid var(--gold); background: white; border-radius: 50%; }
  .timeline-content h4 { font-size: 16px; font-weight: 600; color: var(--steel); margin-bottom: 0.5rem; }
  .timeline-content p { font-size: 14px; color: #666; line-height: 1.7; }

  .psu-section { background: var(--steel); padding: 80px 4rem; }
  .psu-section .section-title { color: white; margin-bottom: 3rem; }
  .psu-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(122,39,72,0.15); }
  .psu-card { background: rgba(255,255,255,0.04); padding: 2rem 1.5rem; border: 1px solid rgba(122,39,72,0.1); }
  .psu-card-name { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--gold); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 0.75rem; }
  .psu-card h4 { font-size: 16px; font-weight: 600; color: white; margin-bottom: 0.75rem; }
  .psu-card p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.65; }
  .psu-badge { display: inline-block; font-family: 'IBM Plex Mono', monospace; font-size: 10px; padding: 4px 10px; background: rgba(122,39,72,0.2); color: var(--gold); letter-spacing: 1px; margin-top: 1rem; }

  .bio-section { padding: 80px 4rem; background: var(--mist); }
  .bio-inner { max-width: 900px; }
  .bio-inner h2 { font-family: 'IBM Plex Sans', sans-serif; font-size: 38px; font-weight: 700; color: var(--steel); margin-bottom: 1.5rem; }
  .bio-inner p { font-size: 15px; color: #555; line-height: 1.85; margin-bottom: 1.25rem; }
  .bio-highlights { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-top: 2rem; }
  .bio-hl { background: white; padding: 1.5rem; border-left: 3px solid var(--gold); }
  .bio-hl h5 { font-size: 14px; font-weight: 600; color: var(--steel); margin-bottom: 0.5rem; }
  .bio-hl p { font-size: 13px; color: #666; line-height: 1.6; margin: 0; }

  /* ============ PRODUCTS PAGE ============ */
  .products-nav { background: var(--mist); padding: 0 4rem; display: flex; gap: 0; border-bottom: 1px solid #e0ddd5; }
  .prod-tab {
    padding: 1.25rem 1.5rem; font-size: 14px; font-weight: 500; cursor: pointer;
    color: #666; border-bottom: 2px solid transparent; transition: all 0.2s;
    background: none; border-top: none; border-left: none; border-right: none;
    font-family: 'Inter', sans-serif;
  }
  .prod-tab.active { color: var(--steel); border-bottom-color: var(--gold); font-weight: 600; }
  .prod-tab:hover { color: var(--steel); }

  .product-detail { display: none; }
  .product-detail.active { display: block; }

  .prod-hero { background: var(--steel); padding: 80px 4rem; }
  .prod-hero h2 { font-family: 'IBM Plex Sans', sans-serif; font-size: 42px; font-weight: 700; color: white; }
  .prod-hero p { font-size: 16px; color: rgba(255,255,255,0.6); max-width: 600px; line-height: 1.75; margin-top: 1rem; }

  .prod-content { padding: 60px 4rem; }
  .prod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }

  .spec-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }
  .spec-table th { background: var(--steel); color: white; padding: 10px 14px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 1px; text-align: left; }
  .spec-table td { padding: 10px 14px; font-size: 13px; border-bottom: 1px solid #e8e4db; }
  .spec-table tr:nth-child(even) td { background: var(--mist); }
  .spec-table tr:hover td { background: #ede9e0; }

  .grade-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #e0ddd5; margin-bottom: 2rem; }
  .grade-card { background: white; padding: 1.75rem 1.5rem; }
  .grade-name { font-family: 'IBM Plex Sans', sans-serif; font-size: 24px; font-weight: 700; color: var(--steel); }
  .grade-sub { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--gold); letter-spacing: 2px; margin-top: 4px; margin-bottom: 1rem; }
  .grade-desc { font-size: 13px; color: #666; line-height: 1.6; }
  .grade-apps { margin-top: 1rem; }
  .grade-apps span { font-size: 12px; background: var(--mist); color: var(--slate); padding: 4px 10px; display: inline-block; margin: 3px 2px; }

  .advantage-list { list-style: none; margin-top: 1.5rem; }
  .advantage-list li { display: flex; gap: 0.75rem; padding: 0.75rem 0; border-bottom: 1px solid #e8e4db; font-size: 14px; color: #555; line-height: 1.6; }
  .advantage-list li::before { content: '◆'; color: var(--gold); font-size: 10px; margin-top: 4px; flex-shrink: 0; }

  /* ============ CONTACT PAGE ============ */
  .contact-layout { display: grid; grid-template-columns: 1fr 1fr; min-height: 90vh; }
  .contact-left { background: var(--steel); padding: 100px 4rem; }
  .contact-left h2 { font-family: 'IBM Plex Sans', sans-serif; font-size: 48px; font-weight: 900; color: white; line-height: 1.1; margin-bottom: 1.5rem; }
  .contact-left h2 span { color: var(--gold); }
  .contact-left p { font-size: 16px; color: rgba(255,255,255,0.55); line-height: 1.75; margin-bottom: 3rem; }
  .contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
  .contact-info-item { display: flex; gap: 1rem; align-items: flex-start; }
  .contact-info-icon { width: 36px; height: 36px; background: rgba(122,39,72,0.15); border: 1px solid rgba(122,39,72,0.3); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
  .contact-info-text h5 { font-size: 11px; font-family: 'IBM Plex Mono', monospace; color: var(--gold); letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 4px; }
  .contact-info-text p { font-size: 14px; color: rgba(255,255,255,0.65); }

  .contact-right { background: white; padding: 100px 4rem; }
  .contact-form { max-width: 480px; }
  .contact-form h3 { font-family: 'IBM Plex Sans', sans-serif; font-size: 28px; font-weight: 700; color: var(--steel); margin-bottom: 2rem; }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  .form-group { margin-bottom: 1.25rem; }
  .form-group label { display: block; font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: #888; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 6px; }
  .form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 12px 14px; border: 1px solid #e0ddd5;
    font-family: 'Inter', sans-serif; font-size: 14px; color: var(--ink);
    background: var(--warm-white); outline: none; transition: border-color 0.2s;
  }
  .form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--gold); }
  .form-group textarea { resize: vertical; min-height: 100px; }
  .form-submit { width: 100%; margin-top: 1rem; }
  .form-note { font-size: 12px; color: #999; margin-top: 1rem; text-align: center; }

  /* QUALITY PAGE */
  .quality-section { padding: 80px 4rem; }
  .lab-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #e0ddd5; margin-top: 3rem; }
  .lab-card { background: white; padding: 1.75rem 1.5rem; }
  .lab-test { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--steel); font-weight: 500; margin-bottom: 0.5rem; }
  .lab-std { font-size: 12px; color: var(--gold); margin-bottom: 0.5rem; }
  .lab-eq { font-size: 13px; color: #666; }

  .protocol-section { background: var(--mist); padding: 80px 4rem; }
  .protocol-steps { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: #d8d4c8; margin-top: 3rem; }
  .protocol-step { background: white; padding: 1.75rem 1.25rem; text-align: center; }
  .step-num { font-family: 'IBM Plex Sans', sans-serif; font-size: 36px; font-weight: 900; color: var(--gold); display: block; }
  .step-title { font-size: 14px; font-weight: 600; color: var(--steel); margin-top: 0.75rem; margin-bottom: 0.5rem; }
  .step-desc { font-size: 12px; color: #777; line-height: 1.6; }

  /* INSIGHTS */
  .blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: #e0ddd5; margin-top: 3rem; }
  .blog-card { background: white; cursor: pointer; }
  .blog-thumb { height: 180px; background: var(--steel); display: flex; align-items: flex-end; padding: 1.5rem; position: relative; overflow: hidden; }
  .blog-thumb::before { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(28,43,58,0.9), transparent); }
  .blog-thumb-tag { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--gold); letter-spacing: 2px; position: relative; z-index: 1; }
  .blog-body { padding: 1.5rem; }
  .blog-title { font-family: 'IBM Plex Sans', sans-serif; font-size: 18px; font-weight: 700; color: var(--steel); margin-bottom: 0.75rem; line-height: 1.3; }
  .blog-excerpt { font-size: 13px; color: #777; line-height: 1.65; }
  .blog-meta { margin-top: 1rem; font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: #aaa; }

  /* CERTIFICATIONS */
  .cert-section { padding: 80px 4rem; }
  .cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 3rem; }
  .cert-card { border: 1px solid #e0ddd5; padding: 2rem; position: relative; }
  .cert-card.featured { border: 2px solid var(--gold); background: #fff7fa; }
  .cert-badge { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--gold); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 1rem; display: block; }
  .cert-card h4 { font-size: 16px; font-weight: 600; color: var(--steel); margin-bottom: 0.5rem; }
  .cert-card p { font-size: 13px; color: #666; line-height: 1.65; }
  .cert-issuer { font-size: 12px; color: #999; margin-top: 0.75rem; font-style: italic; }
  .cert-status { display: inline-block; font-family: 'IBM Plex Mono', monospace; font-size: 10px; padding: 3px 10px; margin-top: 0.75rem; }
  .cert-status.active { background: #e8f5e8; color: #2d6a2d; }
  .cert-status.historical { background: var(--mist); color: #888; }
  .cert-featured-label { position: absolute; top: -10px; left: 1.5rem; background: var(--gold); color: white; font-family: 'IBM Plex Mono', monospace; font-size: 10px; padding: 2px 12px; letter-spacing: 1px; }

  /* GLOBAL SOURCING */
  .sourcing-table-wrap { overflow-x: auto; margin-top: 2rem; }
  .sourcing-table { width: 100%; border-collapse: collapse; }
  .sourcing-table th { background: var(--steel); color: white; padding: 12px 16px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 1px; text-align: left; }
  .sourcing-table td { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid #e8e4db; }
  .sourcing-table tr:nth-child(even) td { background: var(--mist); }
  .sourcing-table td:first-child { font-weight: 600; color: var(--steel); }

  .export-section { background: var(--steel); padding: 80px 4rem; margin-top: 0; }
  .export-section .section-tag { color: var(--brand-on-dark); }
  .export-section .section-title { color: white; }
  .export-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: rgba(122,39,72,0.15); margin-top: 3rem; }
  .export-card { background: rgba(255,255,255,0.05); padding: 2.5rem 2rem; }
  .export-flag { font-size: 32px; margin-bottom: 1rem; }
  .export-card h4 { font-size: 20px; font-weight: 700; color: white; margin-bottom: 1rem; font-family: 'IBM Plex Sans', sans-serif; }
  .export-card p { font-size: 14px; color: rgba(255,255,255,0.68); line-height: 1.7; margin-bottom: 1rem; }
  .export-products { display: flex; flex-wrap: wrap; gap: 8px; }
  .export-pill { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--brand-on-dark-soft); background: rgba(217,122,157,0.12); border: 1px solid rgba(217,122,157,0.35); padding: 4px 12px; }
  .strategic-note { margin-top: 2rem; padding: 2rem; background: rgba(217,122,157,0.1); border: 1px solid rgba(217,122,157,0.32); }
  .strategic-note-label { font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--brand-on-dark); letter-spacing: 2px; font-weight: 700; margin-bottom: 0.75rem; }
  .strategic-note p { font-size: 15px; color: rgba(255,255,255,0.82); line-height: 1.75; }

  /* WHATSAPP */
  .whatsapp-float {
    position: fixed; bottom: 2rem; right: 2rem; z-index: 500;
    background: #25D366; color: white; width: 56px; height: 56px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 20px rgba(37,211,102,0.35); cursor: pointer;
    transition: transform 0.2s; font-size: 26px; text-decoration: none;
  }
  .whatsapp-float:hover { transform: scale(1.1); }

  /* RESPONSIVE */
  @media (max-width: 900px) {
    nav { padding: 0 1.5rem; }
    .brand-logo { width: 160px; }
    .nav-links { display: none; }
    .hero, .section, .usp-section, .industries-section, .cases-section, .about-intro, .vision-section, .milestones, .psu-section, .bio-section, .contact-left, .contact-right, .quality-section, .protocol-section, .cert-section { padding-left: 1.5rem; padding-right: 1.5rem; }
    .hero { padding-top: 100px; }
    .stats-strip { grid-template-columns: repeat(3, 1fr); padding: 2rem 1.5rem; }
    .product-grid, .cases-grid, .grade-cards { grid-template-columns: 1fr; }
    .usp-grid, .about-intro-grid, .prod-grid, .contact-layout, .vvm-grid, .psu-grid, .bio-highlights, .export-grid, .footer-grid { grid-template-columns: 1fr; }
    .protocol-steps { grid-template-columns: repeat(3,1fr); }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .blog-grid, .cert-grid, .lab-grid { grid-template-columns: 1fr; }
    .timeline-year { font-size: 16px; }
    .timeline::before { left: 80px; }
    .timeline-item { grid-template-columns: 80px 1fr; gap: 1.5rem; }
    .timeline-dot { left: 73px; }
    .products-nav { overflow-x: auto; padding: 0 1.5rem; }
    .prod-hero, .prod-content { padding-left: 1.5rem; padding-right: 1.5rem; }
    .sourcing-section { padding: 60px 1.5rem; }
    .export-section { padding: 60px 1.5rem; }
  }

/* ============ DESIGN SYSTEM REFINEMENTS ============ */
body {
  font-family: 'Inter', sans-serif;
  font-weight: 400;
}

h1, h2, h3, h4,
.section-title,
.page-hero h1,
.hero h1,
.stat-num,
.case-title,
.cta-banner h2,
.prod-hero h2,
.grade-name,
.contact-left h2,
.contact-form h3,
.blog-title,
.export-card h4 {
  font-family: 'IBM Plex Sans', sans-serif;
  letter-spacing: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.btn-primary,
.btn-ghost,
.nav-cta {
  border-radius: 2px;
}

.nav-links-wrap {
  display: flex;
  align-items: center;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links a.active {
  color: var(--brand-on-dark);
}

.mobile-menu-btn,
.mobile-menu-close {
  display: none;
}

.mobile-menu {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(86vw, 360px);
  z-index: 1200;
  background: #0d1a24;
  border-left: 1px solid rgba(122,39,72,0.24);
  transform: translateX(100%);
  transition: transform 0.24s ease;
  padding: 1.25rem;
  box-shadow: -24px 0 48px rgba(0,0,0,0.3);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.mobile-menu-close {
  color: white;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.14);
  width: 40px;
  height: 40px;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.mobile-nav-links {
  list-style: none;
  display: grid;
  gap: 0.25rem;
}

.mobile-nav-links a {
  display: block;
  color: rgba(255,255,255,0.76);
  text-decoration: none;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-weight: 600;
}

.mobile-nav-links a.active {
  color: var(--brand-on-dark);
}

.mobile-menu-footer {
  margin-top: 2rem;
}

.menu-open {
  overflow: hidden;
}

.hero {
  min-height: 92vh;
  isolation: isolate;
}

.hero::before {
  width: 56%;
  background:
    linear-gradient(90deg, rgba(28,43,58,0.18), rgba(28,43,58,0.92)),
    linear-gradient(180deg, rgba(28,43,58,0.08), rgba(28,43,58,0.42)),
    url('../images/hero-industrial-bitumen.jpg') center / cover no-repeat;
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 0% 100%);
  opacity: 0.82;
  z-index: -1;
}

.hero::after {
  display: none;
}

.hero h1 {
  max-width: 760px;
  font-size: clamp(46px, 5.2vw, 76px);
}

.hero-sub {
  color: rgba(255,255,255,0.72);
  font-weight: 400;
}

.proof-band {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) 1.45fr;
  gap: 3rem;
  align-items: end;
  padding: 72px 4rem;
  background: #f8f7f3;
  border-bottom: 1px solid #e0ddd5;
}

.proof-copy h2 {
  color: var(--steel);
  font-size: clamp(26px, 2.5vw, 40px);
  line-height: 1.12;
  margin-bottom: 1rem;
  font-family: 'IBM Plex Sans', sans-serif;
}

.proof-copy p {
  color: #5f6670;
  line-height: 1.75;
  max-width: 560px;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #ddd7ca;
}

.proof-card {
  background: white;
  padding: 1.4rem 1.2rem;
  min-height: 138px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.proof-card span,
.compliance-card span {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 1.6px;
}

.proof-card strong,
.compliance-card strong {
  display: block;
  color: var(--steel);
  font-size: 17px;
  line-height: 1.25;
  margin: 0.75rem 0 0.4rem;
}

.proof-card small,
.compliance-card small {
  color: #77808a;
  line-height: 1.5;
}

.product-card {
  min-height: 260px;
}

.product-card::before {
  content: '';
  display: block;
  height: 4px;
  width: 42px;
  background: var(--gold);
  margin-bottom: 1.25rem;
  transform: scaleX(0.7);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.product-card:hover::before {
  transform: scaleX(1.4);
}

.product-card-featured {
  grid-column: span 2;
  background:
    linear-gradient(90deg, rgba(13,26,36,0.95), rgba(13,26,36,0.82)),
    url('../images/hero-industrial-bitumen.jpg') center / cover no-repeat;
}

.product-card-featured .product-grades {
  color: var(--amber);
}

.product-card-featured .product-name {
  color: white;
  font-size: 20px;
  margin-bottom: 0.75rem;
}

.product-card-featured .product-desc {
  color: rgba(255,255,255,0.68);
}

.product-card-featured strong {
  color: var(--gold);
}

.usp-lead {
  margin-top: 2rem;
  font-size: 15px;
  color: #666;
  line-height: 1.75;
  max-width: 440px;
}

.section-cta {
  margin-top: 2rem;
}

.blog-thumb {
  background-image:
    linear-gradient(to top, rgba(28,43,58,0.94), rgba(28,43,58,0.12)),
    url('../images/hero-industrial-bitumen.jpg');
  background-size: cover;
  background-position: center;
}

.compliance-section {
  padding: 60px 4rem;
  background: var(--mist);
}

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #d8d4c8;
  margin-top: 2rem;
}

.compliance-card {
  background: white;
  padding: 1.5rem;
}

.form-note.success {
  color: #2d6a2d;
  background: #e8f5e8;
  padding: 0.8rem 1rem;
}

@media (max-width: 1100px) {
  nav {
    padding: 0 1.5rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-links a {
    font-size: 13px;
  }
}

@media (max-width: 900px) {
  .nav-links-wrap,
  .nav-cta {
    display: none;
  }

  .mobile-menu-btn,
  .mobile-menu-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .mobile-menu-btn {
    width: 44px;
    height: 44px;
    border: 1px solid rgba(255,255,255,0.16);
    background: transparent;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
  }

  .mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background: white;
  }

  .hero {
    min-height: 86vh;
    padding-bottom: 52px;
  }

  .hero::before {
    inset: auto 0 0 0;
    width: 100%;
    height: 42%;
    clip-path: none;
    opacity: 0.28;
  }

  .hero h1 {
    font-size: clamp(38px, 12vw, 54px);
  }

  .hero-trust {
    gap: 0.9rem;
  }

  .proof-band {
    grid-template-columns: 1fr;
    padding: 52px 1.5rem;
  }

  .proof-grid,
  .compliance-grid {
    grid-template-columns: 1fr 1fr;
  }

  .product-card-featured {
    grid-column: span 1;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .brand-logo { width: 142px; }

  .stats-strip,
  .protocol-steps,
  .proof-grid,
  .compliance-grid {
    grid-template-columns: 1fr;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
    text-align: center;
  }

  .whatsapp-float {
    right: 1rem;
    bottom: 1rem;
  }
}

/* ============ CLIENT SPEC UPDATE PASS ============ */
.hero-tag {
  font-size: 12px;
  letter-spacing: 4px;
  color: #c25a7d;
  font-weight: 600;
}

.proof-band {
  align-items: center;
}

.proof-copy h2 {
  font-size: clamp(30px, 3vw, 48px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-title {
  letter-spacing: -0.015em;
}

.stat-num {
  font-size: clamp(40px, 4.4vw, 64px);
}

.product-grid {
  grid-template-columns: repeat(3, 1fr);
}

.product-card-featured {
  grid-column: span 1;
}

.product-card-featured .product-desc {
  max-width: none;
}

.modified-category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: #d8d4c8;
  margin-bottom: 2rem;
}

.modified-category-card {
  background: white;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.category-kicker {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 2px;
}

.modified-category-card h3 {
  font-size: 22px;
  color: var(--steel);
  line-height: 1.2;
}

.modified-category-card p {
  color: #606975;
  font-size: 14px;
  line-height: 1.7;
}

.category-grades {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.category-grades span {
  background: var(--mist);
  color: var(--slate);
  font-size: 12px;
  padding: 5px 10px;
}

.compact-spec {
  margin-top: auto;
}

.modified-category-card .spec-table {
  display: block;
  overflow-x: auto;
  min-width: 100%;
}

.modified-category-card .spec-table th,
.modified-category-card .spec-table td {
  min-width: 120px;
  vertical-align: top;
}

.milestone-redesign {
  background: var(--warm-white);
}

.milestone-header .section-sub {
  max-width: 520px;
  margin-bottom: 0;
}

.milestone-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: #d8d4c8;
}

.milestone-card {
  background: white;
  padding: 2rem 1.5rem;
  min-height: 270px;
  display: flex;
  flex-direction: column;
  border-top: 4px solid transparent;
}

.milestone-card-featured {
  background: #121A2C;
  border-top-color: var(--amber);
}

.milestone-year {
  display: block;
  color: var(--gold);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 1.4rem;
}

.milestone-card h4 {
  color: var(--steel);
  font-size: 17px;
  line-height: 1.3;
  margin-bottom: 0.85rem;
}

.milestone-card p {
  color: #666f7a;
  font-size: 13px;
  line-height: 1.7;
}

.milestone-card-featured h4,
.milestone-card-featured p {
  color: white;
}

.psu-section .section-title {
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.05;
}

.psu-grid {
  gap: 10px;
  background: transparent;
}

.psu-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  min-height: 260px;
}

.psu-card-name {
  font-size: 12px;
  color: var(--amber);
}

.psu-card h4 {
  font-size: 22px;
  line-height: 1.2;
}

.psu-card p {
  font-size: 14px;
}

.psu-badge {
  padding: 7px 12px;
  border: 1px solid rgba(200,149,59,0.3);
  background: rgba(200,149,59,0.12);
  color: var(--amber);
}

.origin-grid,
.sourcing-benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: #d8d4c8;
  margin: 2rem 0;
}

.origin-card,
.sourcing-benefits > div {
  background: white;
  padding: 2rem;
}

.origin-card span {
  color: var(--gold);
  font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 2px;
  font-size: 11px;
}

.origin-card h3 {
  color: var(--steel);
  font-size: 30px;
  margin: 1rem 0 0.75rem;
}

.origin-card p,
.sourcing-benefits p {
  color: #606975;
  line-height: 1.7;
  font-size: 14px;
}

.office-card-grid {
  display: grid;
  gap: 12px;
  margin-top: 2rem;
}

.office-card {
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(255,255,255,0.1);
  border-left: 3px solid var(--gold);
  padding: 1.1rem 1.2rem;
}

.office-card span {
  display: block;
  color: var(--amber);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 0.55rem;
}

.office-card p {
  margin: 0;
  color: rgba(255,255,255,0.68);
  font-size: 13px;
  line-height: 1.6;
}

.certificate-gallery-section {
  padding: 80px 4rem;
  background: var(--warm-white);
}

.certificate-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.certificate-image-card {
  border: 1px solid #ded8cd;
  background: white;
  padding: 1rem;
  cursor: pointer;
  text-align: left;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.certificate-image-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold);
  box-shadow: 0 18px 40px rgba(18,26,44,0.12);
}

.certificate-image-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--mist);
  display: block;
}

.certificate-image-card span {
  display: block;
  margin-top: 0.85rem;
  color: var(--steel);
  font-weight: 700;
}

.cert-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10,14,22,0.82);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.cert-lightbox.active {
  display: flex;
}

.cert-lightbox-inner {
  background: white;
  width: min(92vw, 620px);
  max-height: 90vh;
  padding: 1rem;
  position: relative;
}

.cert-lightbox img,
.cert-lightbox iframe {
  width: 100%;
  max-height: 78vh;
  object-fit: contain;
  display: block;
  border: none;
}

.cert-lightbox button {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 38px;
  height: 38px;
  border: none;
  background: var(--steel);
  color: white;
  cursor: pointer;
  font-size: 24px;
  z-index: 10;
}

@media (max-width: 1100px) {
  .milestone-grid,
  .certificate-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .modified-category-grid,
  .origin-grid,
  .sourcing-benefits {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-card-featured {
    grid-column: span 1;
  }

  .certificate-gallery-section {
    padding: 60px 1.5rem;
  }
}

@media (max-width: 560px) {
  .milestone-grid,
  .certificate-gallery-grid {
    grid-template-columns: 1fr;
  }

  .modified-category-card {
    padding: 1.5rem;
  }

  .modified-category-card h3 {
    font-size: 20px;
    overflow-wrap: anywhere;
  }
}