*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    :root {
      --navy: #2a2a2a;
      --navy-light: #333333;
      --white: #ffffff;
      --green: #4caf50;
      --border: rgba(255,255,255,0.1);
      --text-dim: rgba(255,255,255,0.6);
      --text-mid: rgba(255,255,255,0.8);
      --transition: 0.3s ease;
    }

    body { font-family: 'Work Sans', sans-serif !important; background: var(--navy); overflow-x: hidden; color: var(--text-mid); }
    a { text-decoration: none; }

    /* ── NAV ── */
    .main-nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      display: flex; align-items: center; justify-content: space-between;
      padding: 22px 48px; background: transparent;
      transition: background 0.4s ease, padding 0.4s ease, box-shadow 0.4s ease;
    }
    .main-nav.scrolled {
      background: rgba(44,44,44,0.97); padding: 14px 48px;
      box-shadow: 0 2px 20px rgba(0,0,0,0.3); backdrop-filter: blur(8px);
    }
    .nav__brand { text-decoration: none; color: #fff; }
    .nav__links { display: flex; list-style: none; gap: 36px; margin: 0; padding: 0; }
    .nav__links a {
      font-size: 12px; font-weight: 400; letter-spacing: 0.14em;
      text-transform: uppercase; color: rgba(255,255,255,0.8);
      text-decoration: none; position: relative; transition: color 0.3s ease;
    }
    .nav__links a::after {
      content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
      height: 1px; background: var(--green);
      transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
    }
    .nav__links a:hover { color: #fff; }
    .nav__links a:hover::after, .nav__links a.active::after { transform: scaleX(1); }
    .nav__links a.active { color: #fff; }
    #menuOpen { background: none; border: none; color: #fff; font-size: 26px; cursor: pointer; display: none; padding: 4px; }

    .mobile-menu {
      display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(44,44,44,0.98); z-index: 190;
      flex-direction: column; align-items: center; justify-content: center; gap: 32px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a { font-size: 22px; font-weight: 200; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.85); text-decoration: none; transition: color 0.3s ease; }
    .mobile-menu a:hover, .mobile-menu a.active { color: #fff; }
    .mobile-menu__close { position: absolute; top: 20px; right: 24px; background: none; border: none; color: #fff; font-size: 32px; cursor: pointer; }

    /* ── HERO ── */
    .hero {
      position: relative; width: 100%; height: 56vh; min-height: 420px;
      overflow: hidden; display: flex; flex-direction: column;
    }
    .hero__bg {
      position: absolute; inset: 0;
      background-image: url('../images/overheating.jpeg');
      background-size: cover; background-position: center 40%;
      transform: scale(1.04); animation: zoomOut 10s ease forwards; z-index: 0;
    }
    @keyframes zoomOut { from { transform: scale(1.04); } to { transform: scale(1.00); } }
    .hero__overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0.3) 100%); z-index: 1; }
    .hero__content { position: relative; z-index: 5; padding: 0 56px; flex: 1; display: flex; flex-direction: column; justify-content: flex-end; padding-bottom: 64px; }
    .hero__breadcrumb { font-size: 14px; font-weight: 400; letter-spacing: 0.12em; color: rgba(255,255,255,0.6); text-transform: uppercase; margin-bottom: 16px; opacity: 0; animation: fadeUp 0.7s 0.15s ease forwards; }
    .hero__breadcrumb a { color: rgba(255,255,255,0.6); }
    .hero__breadcrumb a:hover { color: #fff; }
    .hero__breadcrumb span { color: var(--green); }
    .hero__heading { font-size: clamp(40px, 7vw, 82px); font-weight: 200; color: #fff; line-height: 1.0; letter-spacing: -0.03em; opacity: 0; animation: fadeUp 0.8s 0.25s ease forwards; }
    .hero__heading strong { font-weight: 500; }
    .hero__sub { font-size: 16px; font-weight: 300; color: rgba(255,255,255,0.75); margin-top: 16px; max-width: 560px; opacity: 0; animation: fadeUp 0.8s 0.4s ease forwards; }
    @keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }

    /* ── INTRO SECTION ── */
    .intro-section {
      background: var(--navy); padding: 72px 56px 64px;
      display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
      border-bottom: 1px solid var(--border);
    }
    .intro-section__label { font-size: 16px; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--green); margin-bottom: 20px; }
    .intro-section__heading { font-size: clamp(28px, 3.5vw, 44px); font-weight: 200; color: #fff; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 24px; }
    .intro-section__heading strong { font-weight: 500; }
    .intro-section__body { font-size: 16px; font-weight: 300; color: var(--text-mid); line-height: 1.8; }
    .intro-section__body p { margin-bottom: 16px; }
    .intro-section__body p:last-child { margin-bottom: 0; }

    .standards-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
    .standards-list li {
      display: flex; align-items: flex-start; gap: 14px;
      font-size: 16px; font-weight: 300; color: var(--text-mid); line-height: 1.5;
      padding: 14px 16px;
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      transition: border-color 0.25s ease, background 0.25s ease;
    }
    .standards-list li:hover { border-color: rgba(76,175,80,0.3); background: rgba(76,175,80,0.05); }
    .standards-list li::before {
      content: ''; display: block; flex-shrink: 0;
      width: 18px; height: 18px; border-radius: 50%;
      background: rgba(76,175,80,0.15); border: 1.5px solid var(--green); margin-top: 2px;
    }
    .standards-list li strong { color: #fff; font-weight: 600; }

    /* ── METHODS GRID ── */
    .methods-section { background: var(--navy-light); padding: 72px 56px 80px; }
    .methods-section__top { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 48px; gap: 32px; }
    .methods-section__heading { font-size: clamp(26px, 3vw, 38px); font-weight: 200; color: #fff; letter-spacing: -0.02em; line-height: 1.1; }
    .methods-section__heading strong { font-weight: 500; }
    .methods-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2px; }

    .method-card {
      background: rgba(255,255,255,0.04); border: 1px solid var(--border);
      padding: 48px 40px 44px; display: flex; flex-direction: column;
      position: relative; overflow: hidden;
      transition: background 0.3s ease, border-color 0.3s ease; text-decoration: none;
    }
    .method-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--green); transform: scaleX(0); transform-origin: left; transition: transform 0.4s ease; }
    .method-card:hover::before { transform: scaleX(1); }
    .method-card:hover { background: rgba(255,255,255,0.07); border-color: rgba(76,175,80,0.35); }

    .method-card__tag { font-size: 10px; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase; color: var(--green); margin-bottom: 24px; }
    .method-card__number { font-size: 64px; font-weight: 100; color: rgba(255,255,255,0.05); line-height: 1; position: absolute; top: 32px; right: 40px; }
    .method-card__title { font-size: 22px; font-weight: 300; color: #fff; letter-spacing: -0.01em; line-height: 1.2; margin-bottom: 10px; }
    .method-card__title strong { font-weight: 500; }
    .method-card__for { font-size: 14px; font-weight: 400; letter-spacing: 0.06em; text-transform: uppercase; color: rgba(76,175,80,0.8); margin-bottom: 18px; }
    .method-card__desc { font-size: 16px; font-weight: 300; color: var(--text-dim); line-height: 1.7; flex: 1; }
    .method-card__link { display: inline-flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: rgba(255,255,255,0.3); margin-top: 28px; transition: color var(--transition); }
    .method-card__link::after { content: '→'; transition: transform var(--transition); }
    .method-card:hover .method-card__link { color: var(--green); }
    .method-card:hover .method-card__link::after { transform: translateX(5px); }

    /* ── CTA STRIP ── */
    .cta-strip {
      background: rgba(76,175,80,0.07); border-top: 1px solid rgba(76,175,80,0.2); border-bottom: 1px solid rgba(76,175,80,0.2);
      padding: 64px 56px; display: flex; align-items: center; justify-content: space-between; gap: 32px;
    }
    .cta-strip__text h3 { font-size: clamp(22px, 2.8vw, 34px); font-weight: 200; color: #fff; letter-spacing: -0.01em; margin-bottom: 8px; }
    .cta-strip__text p { font-size: 15px; font-weight: 300; color: var(--text-dim); }
    .btn-cta {
      font-family: 'Work Sans', sans-serif; font-size: 11px; font-weight: 600;
      letter-spacing: 0.2em; text-transform: uppercase;
      color: #fff; background: var(--green); border: none; padding: 16px 40px;
      cursor: pointer; white-space: nowrap; flex-shrink: 0;
      transition: background 0.3s ease, transform 0.3s ease; text-decoration: none; display: inline-block;
    }
    .btn-cta:hover { background: #43a047; transform: translateY(-2px); color: #fff; }

    /* ── FOOTER ── */
    .site-footer { background-color: #2a2a2a; color: rgba(255,255,255,0.75); font-family: 'Work Sans', sans-serif; }
    .footer-inner { display: grid; grid-template-columns: 1.2fr 1fr 0.8fr 1.4fr; gap: 48px; padding: 72px 64px 56px; }
    .footer-heading { font-size: 15px; font-weight: 500; color: #fff; letter-spacing: 0.04em; margin-bottom: 24px; }
    .footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
    .footer-links a { color: rgba(255,255,255,0.65); text-decoration: none; font-size: 14px; font-weight: 300; transition: color 0.25s ease; }
    .footer-links a:hover { color: #fff; }
    .footer-social-list a { display: flex; align-items: center; gap: 10px; }
    .footer-social-list i { font-size: 15px; }
    .footer-logo-placeholder { margin-bottom: 32px; }
    .footer-logo-placeholder img { max-width: 140px; height: auto; }
    .footer-office { margin-bottom: 24px; }
    .office-name { font-size: 13px; font-weight: 600; color: #fff; margin-bottom: 6px; }
    .footer-office p { font-size: 13px; font-weight: 300; line-height: 1.7; color: rgba(255,255,255,0.65); margin: 0 0 3px; }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 18px 64px; font-size: 12px; font-weight: 300; color: rgba(255,255,255,0.35); }

    @media (max-width: 1024px) {
      .intro-section { grid-template-columns: 1fr; gap: 40px; padding: 56px 40px; }
      .methods-section { padding: 56px 40px 64px; }
      .cta-strip { padding: 52px 40px; }
      .footer-inner { grid-template-columns: 1fr 1fr; gap: 36px; padding: 48px 40px 40px; }
      .footer-bottom { padding: 18px 40px; }
    }
    @media (max-width: 900px) {
      #menuOpen { display: block !important; } .nav__links { display: none; }
      .main-nav { padding: 16px 24px; } .main-nav.scrolled { padding: 12px 24px; }
    }
    @media (max-width: 768px) {
      .hero__content { padding: 0 24px; padding-bottom: 48px; }
      .methods-grid { grid-template-columns: 1fr; }
      .methods-section { padding: 48px 24px 56px; }
      .intro-section { padding: 48px 24px; }
      .cta-strip { flex-direction: column; align-items: flex-start; padding: 48px 24px; }
      .btn-cta { width: 100%; text-align: center; }
      .footer-inner { grid-template-columns: 1fr 1fr; padding: 40px 24px 32px; }
      .footer-bottom { padding: 16px 24px; }
    }
    @media (max-width: 576px) {
      .footer-inner { grid-template-columns: 1fr; }
      .methods-section__top { flex-direction: column; align-items: flex-start; }
    }