:root {
      /* Dark-blue theme */
      --bg: #061626;
      --white: #0b2238;
      --text: #eaf2ff;
      --text-muted: #b8c7da;
      --accent-blue: #2f81f7;
      --accent-blue-dark: #1f6feb;
      --border: #1b3a57;
      --shadow: rgba(0, 0, 0, 0.35);
      --footer-bg: #040f1b;
    }

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

    html, body {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
      background: #ffffff;
      color: var(--text);
      line-height: 1.5;
      min-height: 100vh;
      padding-top: var(--header-offset, 84px);
    }

    /* Header */
    .header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: nowrap;
      padding: 1rem 2.5rem;
      background: rgba(11, 34, 56, 0.82);
      border-bottom: 1px solid var(--border);
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
    }

    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 1rem;
      min-width: 0;
      flex-shrink: 1;
    }

    .logo-text {
      min-width: 0;
    }

    .logo-icon {
      flex-shrink: 0;
    }

    .logo-icon svg {
      display: block;
      width: 52px;
      height: 52px;
    }

    .logo-text h1 {
      font-size: 1.75rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--text);
      line-height: 1.2;
    }

    .logo-text .tagline {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 400;
      margin-top: 2px;
    }

    .nav-top-right {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }

    .mobile-menu-toggle {
      display: none;
      width: 32px;
      height: 32px;
      padding: 0;
      border: none;
      background: transparent;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 4px;
      cursor: pointer;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text);
      border-radius: 999px;
      transition: transform 0.2s, opacity 0.2s;
    }

    .search-lang {
      font-size: 0.85rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }

    .search-lang svg {
      width: 18px;
      height: 18px;
      opacity: 0.8;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text);
      font-weight: 500;
      font-size: 0.95rem;
      padding-bottom: 0.25rem;
    }

    .nav-links a:hover {
      color: var(--accent-blue);
    }

    .nav-links a.active {
      border-bottom: 2px solid var(--text);
      color: var(--text);
    }

    /* Hero */
    .hero {
      position: relative;
      min-height: 420px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      margin-top: calc(-1 * var(--header-offset, 84px));
      padding: calc(var(--header-offset, 84px) + 3rem) 2rem 3rem 2rem;
      overflow: hidden;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, #e8eaed 0%, #d4d8de 40%, #c2c8d0 100%);
      background-image:
        linear-gradient(135deg, rgba(255,255,255,0.4) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    }

    .hero-bg::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 100%;
      background: linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0.25), transparent);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      /* max-width: 800px; */
    }

    .hero h2 {
      /* width: max-content; */
      margin-top: 2rem;
      font-size: clamp(2rem, 5vw, 3.25rem);
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #ffffff;
      margin-bottom: 1rem;
      text-shadow: 0 2px 8px rgba(0,0,0,0.35);
    }

    .hero p {
      font-size: 1.1rem;
      color: #f1f2f6;
      font-weight: 400;
      max-width: 560px;
      margin: 0 auto;
      text-shadow: 0 1px 4px rgba(0,0,0,0.35);
    }

    /* Product banners (home page) */
    .product-banners {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      width: 100%;
      max-width: 100%;
      margin: 1rem 0 4rem;
      padding: 0;
      position: relative;
      z-index: 2;
      border-top: 1px solid rgba(27, 58, 87, 0.35);
    }

    .product-banner {
      display: flex;
      align-items: stretch;
      text-decoration: none;
      color: inherit;
      min-height: 320px;
      position: relative;
      overflow: hidden;
    }

    .product-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(6,22,38,0.88) 0%, rgba(6,22,38,0.5) 40%, rgba(6,22,38,0.35) 100%);
      z-index: 0;
      pointer-events: none;
    }

    .product-banner-lime {
      background: var(--white) url('media/limestone.jpg') center/cover no-repeat;
    }

    .product-banner-biomass {
      background: var(--white) url('media/sawdust_pellets.jpeg') center/cover no-repeat;
    }

    .product-banner-inner {
      display: flex;
      flex-direction: column;
      padding: 2.5rem 2rem;
      width: 100%;
      position: relative;
      z-index: 1;
      transition: transform 0.2s;
    }

    .product-banner:hover .product-banner-inner {
      transform: translateY(-3px);
    }

    .product-banner-icon {
      width: 56px;
      height: 56px;
      margin-bottom: 1.25rem;
      color: #eaf2ff;
      flex-shrink: 0;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .product-banner h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: #ffffff;
    }

    .product-banner h3::after {
      content: '';
      display: block;
      width: 44px;
      height: 3px;
      margin-top: 0.55rem;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--accent-blue), rgba(47,129,247,0.5));
    }

    .product-banner ul {
      list-style: none;
      margin-bottom: 1.5rem;
      flex: 1;
    }

    .product-banner li {
      padding: 0.35rem 0;
      color: rgba(234,242,255,0.9);
      font-size: 0.95rem;
    }

    .product-banner li::before {
      content: '•';
      margin-right: 0.5rem;
      color: var(--accent-blue);
    }

    .product-banner .btn {
      background: transparent;
      border-color: rgba(234,242,255,0.9);
      color: #ffffff;
      align-self: flex-start;
    }

    .product-banner:hover .btn {
      background: var(--accent-blue);
      border-color: var(--accent-blue);
      color: #ffffff;
    }

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

      .product-banner {
        min-height: 280px;
      }

      .product-banner-inner {
        padding: 2rem 1.5rem;
      }
    }

    /* Cards */
    .cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      max-width: 1100px;
      margin: -2rem auto 4rem;
      padding: 0 2rem;
      position: relative;
      z-index: 2;
    }

    .card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 2rem;
      box-shadow: 0 10px 26px var(--shadow);
      transition: box-shadow 0.2s, transform 0.2s;
    }

    .card:hover {
      box-shadow: 0 14px 36px rgba(0,0,0,0.45);
      transform: translateY(-2px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      margin-bottom: 1.25rem;
      color: var(--text);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .card h3 {
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: #ffffff;
    }

    .card h3::after {
      content: '';
      display: block;
      width: 44px;
      height: 3px;
      margin-top: 0.55rem;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--accent-blue), rgba(47,129,247,0.25));
    }

    .card ul {
      list-style: none;
      margin-bottom: 1.5rem;
    }

    .card li {
      padding: 0.35rem 0;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .card li::before {
      content: '•';
      margin-right: 0.5rem;
      color: var(--accent-blue);
    }

    .card h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
    }

    .card a {
      color: #eaf2ff;
      text-decoration: none;
    }

    .card a:hover {
      text-decoration: underline;
      color: #ffffff;
    }

    /* High-contrast buttons on dark cards (e.g., "View Details") */
    .card .btn-contrast {
      color: #eaf2ff;
      border-color: #eaf2ff;
      background: transparent;
    }

    .card .btn-contrast:hover {
      background: #eaf2ff;
      color: #061626;
      border-color: #eaf2ff;
    }

    .card-quality-assurance {
      max-width: 420px;
      margin: 0 auto;
    }

    .btn {
      display: inline-block;
      padding: 0.6rem 1.4rem;
      border: 2px solid var(--text);
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text);
      text-decoration: none;
      transition: background 0.2s, color 0.2s;
    }

    .btn:hover {
      background: var(--text);
      color: #061626;
    }

    .btn-primary {
      background: var(--accent-blue);
      border-color: var(--accent-blue);
      color: var(--white);
    }

    .btn-primary:hover {
      background: var(--accent-blue-dark);
      border-color: var(--accent-blue-dark);
      color: var(--white);
    }

    /* Default secondary buttons on light sections: dark, legible text */
     main .btn:not(.btn-primary) {
      color: #0b1a2a;
      border-color: #0b1a2a;
      background: transparent;
    }

    main .btn:not(.btn-primary):hover {
      background: #0b1a2a;
      color: #ffffff;
      border-color: #0b1a2a;
    } 

    /* High-contrast buttons on cards: white outline, transparent fill */
    .card .btn.btn-contrast {
      background: transparent;
      border-color: #ffffff;
      color: #ffffff;
    }

    .card .btn.btn-contrast:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: #ffffff;
      color: #ffffff;
    }

    .cta-row {
      display: flex;
      gap: 0.75rem;
      flex-wrap: wrap;
      align-items: center;
      justify-content: flex-start;
    }

    /* Floating contact button */
    .floating-contact {
      position: fixed;
      right: 1.75rem;
      bottom: 1.75rem;
      z-index: 120;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 0.5rem;
    }

    .floating-btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.4rem 0.7rem 0.4rem 0.6rem;
      border-radius: 999px;
      border: none;
      background: var(--accent-blue);
      color: #ffffff;
      font-size: 0.8rem;
      font-weight: 600;
      box-shadow: 0 10px 26px rgba(0,0,0,0.25);
      cursor: pointer;
      text-decoration: none;
      white-space: nowrap;
    }

    .floating-btn-secondary i {
      width: 18px;
      height: 18px;
    }

    .floating-btn-secondary:hover {
      background: var(--accent-blue-dark);
      color: #ffffff;
    }

    /* Sections */
    .section {
      padding: 3rem 2rem;
      scroll-margin-top: calc(var(--header-offset, 84px) + 12px);
    }

    .section-inner {
      max-width: 1100px;
      margin: 0 auto;
    }

    .section h2 {
      font-size: 2rem;
      font-weight: 900;
      letter-spacing: 0.02em;
      margin-bottom: 0.75rem;
    }

    .section p {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 75ch;
    }

    /* Keep section text readable on white page background,
       without changing cards/header/footer theme */
    main {
      color: #0b1a2a;
    }

    main .section h2 {
      color: #0b1a2a;
      letter-spacing: 0.01em;
      text-shadow: 0 1px 0 rgba(255,255,255,0.6);
    }

    main .section h2::after {
      content: '';
      display: block;
      width: 64px;
      height: 4px;
      margin-top: 0.55rem;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--accent-blue), rgba(11,94,215,0.18));
    }

    main .section p {
      color: #41566d;
    }

    /* All h3 in main content (subsection titles) – dark like h2 */
    main .section-inner > section > h3,
    #products .section-inner > section > h3 {
      color: #0b1a2a;
      font-weight: 800;
    }

    /* Products section: same headline/paragraph style as main, full-bleed banners */
    #products.section {
      padding-left: 0;
      padding-right: 0;
    }

    #products .section-inner h2 {
      color: #0b1a2a;
      letter-spacing: 0.01em;
      text-shadow: 0 1px 0 rgba(255,255,255,0.6);
    }

    #products .section-inner h2::after {
      content: '';
      display: block;
      width: 64px;
      height: 4px;
      margin-top: 0.55rem;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--accent-blue), rgba(11,94,215,0.18));
    }

    #products .section-inner p {
      color: #41566d;
    }

    #products .section-inner {
      padding-left: 2rem;
      padding-right: 2rem;
    }

    .section + .section {
      padding-top: 0;
    }

    /* Feedback form */
    .feedback-form {
      margin-top: 1.5rem;
      padding: 1.75rem 1.5rem;
      border-radius: 12px;
      background: var(--white);
      border: 1px solid var(--border);
      box-shadow: 0 10px 26px var(--shadow);
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1.1rem 1.5rem;
    }

    .feedback-form .form-row {
      display: flex;
      flex-direction: column;
      gap: 0.35rem;
    }

    .feedback-form label {
      font-size: 0.9rem;
      font-weight: 600;
      color: white;
    }

    .feedback-form input,
    .feedback-form select,
    .feedback-form textarea {
      border-radius: 8px;
      border: 1px solid #b8c7da;
      padding: 0.55rem 0.7rem;
      font-family: inherit;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s, color 0.15s;
      background-color: #ffffff;
      color: #0b1a2a;
    }

    .feedback-form select {
      background-color: #ffffff;
      color: #0b1a2a;
    }

    .feedback-form select option {
      background: #ffffff;
      color: #0b1a2a;
    }

    .feedback-form textarea {
      resize: vertical;
      min-height: 120px;
      grid-column: 1 / -1;
    }

    .feedback-form input:focus,
    .feedback-form select:focus,
    .feedback-form textarea:focus {
      border-color: var(--accent-blue);
      box-shadow: 0 0 0 1px rgba(9,132,227,0.35);
      background-color: #ffffff;
      color: #0b1a2a;
    }

    .feedback-form input::placeholder,
    .feedback-form textarea::placeholder {
      color: #7a8898;
    }

    .feedback-form .cta-row {
      grid-column: 1 / -1;
      justify-content: flex-start;
    }

    .feedback-form .btn {
      cursor: pointer;
    }

    .feedback-form .btn:not(.btn-primary) {
      color: #eaf2ff;
      border-color: #b8c7da;
      background: transparent;
    }

    .feedback-form .btn:not(.btn-primary):hover {
      background: #eaf2ff;
      color: #0b2238;
      border-color: #eaf2ff;
    }

    .feedback-form small {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .feedback-form .required {
      color: #f8b4b4;
    }

    .feedback-form .msg-counter {
      margin-top: 0.25rem;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .feedback-form .form-status {
      grid-column: 1 / -1;
      padding: 0.6rem 0.75rem;
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 500;
    }

    .feedback-form .form-status-pending {
      background: rgba(47, 129, 247, 0.12);
      color: #0b1a2a;
      border: 1px solid rgba(47, 129, 247, 0.3);
    }

    .feedback-form .form-status-success {
      background: rgba(34, 197, 94, 0.12);
      color: #0b1a2a;
      border: 1px solid rgba(34, 197, 94, 0.4);
    }

    .feedback-form .form-status-error {
      background: rgba(239, 68, 68, 0.1);
      color: #0b1a2a;
      border: 1px solid rgba(239, 68, 68, 0.35);
    }

    /* Footer */
    .footer {
      background: var(--footer-bg);
      color: #b8c7da;
      padding: 3rem 2.5rem 2rem;
      margin-top: auto;
    }

    .footer-inner {
      max-width: 1100px;
      margin: 0 auto;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 2rem;
    }

    .footer-brand .logo-icon svg {
      width: 40px;
      height: 40px;
    }

    .footer-brand-text {
      margin-left: 0.75rem;
    }

    .footer-title {
      font-weight: 600;
      color: #eaf2ff;
    }

    .footer-subtitle {
      font-size: 0.9rem;
      color: #b2bec3;
      margin-top: 0.15rem;
    }

    .footer-brand .logo-icon .gem stop { stop-color: #74b9ff; }
    .footer-brand .logo-icon .flame { fill: #b2bec3; }
    .footer-brand .logo-icon .ring { stroke: #b2bec3; }

    .footer-contact {
      font-size: 0.9rem;
      line-height: 1.7;
    }

    .footer-contact a {
      color: #dfe6e9;
      text-decoration: none;
    }

    .footer-contact a:hover {
      text-decoration: underline;
    }

    .footer-mid {
      font-size: 0.9rem;
      line-height: 1.7;
    }

    .footer-mid h3 {
      font-size: 1.05rem;
      font-weight: 600;
      color: #eaf2ff;
      margin-bottom: 0.5rem;
    }

    .footer-mid a {
      color: #ffffff;
      text-decoration: none;
    }

    .footer-mid a:hover {
      text-decoration: underline;
    }

    .footer-social {
      display: flex;
      gap: 1rem;
      align-items: flex-start;
    }

    .footer-social a {
      color: #b2bec3;
      transition: color 0.2s;
    }

    .footer-social a:hover {
      color: #fff;
    }

    .footer-social svg {
      width: 22px;
      height: 22px;
    }

    .footer-bottom {
      width: 100%;
      margin-top: 2rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255,255,255,0.1);
      font-size: 0.85rem;
      color: rgba(184, 199, 218, 0.78);
    }

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

    @media (max-width: 900px) {
      .cards {
        grid-template-columns: 1fr;
        margin: 2rem auto;
      }

      .hero {
        padding: 2.5rem 1.5rem;
      }

      .section {
        padding: 2.5rem 1.5rem;
      }

      .feedback-form {
        grid-template-columns: 1fr;
        padding: 1.5rem 1.25rem;
      }
    }

    @media (max-width: 1024px) {
      .header {
        padding: 0.75rem 1.5rem;
        flex-direction: row;
        align-items: center;
        gap: 0.75rem;
      }

      .logo-wrap {
        gap: 0.5rem;
      }

      .logo-icon img {
        max-height: 40px;
      }

      .logo-text h1 {
        font-size: 1.15rem;
        line-height: 1.2;
      }

      .logo-text .tagline {
        font-size: 0.7rem;
      }

      .nav-top-right {
        width: auto;
        gap: 0.75rem;
      }

      .search-lang {
        display: none;
      }

      .mobile-menu-toggle {
        display: flex;
      }

      .nav-top-right nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(11, 34, 56, 0.98);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 14px 36px rgba(0,0,0,0.45);
        padding: 0.75rem 1.5rem 1rem;
        display: none;
      }

      .nav-links {
        flex-direction: column;
        gap: 0.75rem;
      }

      .nav-links a {
        display: inline-block;
        padding: 0.25rem 0;
      }

      .header.nav-open nav {
        display: block;
      }

      .header.nav-open .mobile-menu-toggle span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
      }

      .header.nav-open .mobile-menu-toggle span:nth-child(2) {
        opacity: 0;
      }

      .header.nav-open .mobile-menu-toggle span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
      }

      .hero {
        min-height: 360px;
        padding: 2.25rem 1.25rem;
      }

      .hero h2 {
        font-size: 1.8rem;
        letter-spacing: 0.06em;
      }

      .hero p {
        font-size: 0.98rem;
      }

      .cards {
        padding: 0 1.25rem;
      }

      .card {
        padding: 1.5rem;
      }

      .section {
        padding: 2.25rem 1.25rem;
      }

      .section h2 {
        font-size: 1.5rem;
      }

      .footer {
        padding: 2.5rem 1.5rem 1.75rem;
      }

      .footer-inner {
        flex-direction: column;
      }
    }

    @media (max-width: 540px) {
      .header {
        padding: 0.5rem 1rem;
      }

      .logo-text .tagline {
        display: none;
      }

      .logo-text h1 {
        font-size: 1rem;
      }

      .logo-icon img {
        max-height: 36px;
      }
    }