:root {
      --dark: #0A1F1C;
      --brand-dark: #6B775A;
      --brand-light: #A8B38A;
      --green: var(--brand-dark);
      --light: #F8FAF9;
      --text: #1A1A1A;
      --gray: #7A7A7A;
      --card: #ffffff;
      --border: #e6e6e6;
      --radius: 18px;
      --shadow-lg: 0 24px 48px rgba(0, 0, 0, .08);
      --shadow-md: 0 12px 28px rgba(0, 0, 0, .07);
      --shadow-sm: 0 6px 16px rgba(0, 0, 0, .06);
      --gradient-brand: linear-gradient(90deg, var(--brand-dark), var(--brand-light));
      /* §14 — Responsive CSS Custom Properties */
      --section-padding-x: 60px;
      --section-padding-y: 60px;
      --card-padding: 40px;
      --grid-gap: 32px;
    }

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

    html,
    body {
      width: 100%;
      font-family: 'Inter', sans-serif;
      background: var(--light);
      color: var(--text);
      overflow-x: hidden;
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }


    /* --- Product Detail Styles --- */

    /* Hero */
    .prod-hero {
      min-height: 100vh;
      min-height: 100svh;
      position: relative;
      background: url('../product/eco-p/hero.webp') no-repeat center center;
      background-size: cover;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: #fff;
      margin-top: 0;
      overflow: hidden;
    }

    /* Fallback if eco-p specific hero doesn't exist yet, use main hero or generic */
    .prod-hero {
      background-color: #0A1F1C;
    }

    .prod-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 31, 28, 0.85) 0%, rgba(10, 31, 28, 0.5) 100%);
      z-index: 1;
    }

    .prod-hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
      padding: 0 30px;
      opacity: 0;
      transform: translateY(30px);
    }

    .prod-hero h1 {
      font-size: 64px;
      font-weight: 900;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
      text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .prod-hero p {
      font-size: 24px;
      line-height: 1.6;
      opacity: 0.95;
      font-weight: 500;
      max-width: 800px;
      margin: 0 auto 10px auto;
    }

    .prod-hero .btn-cta {
      margin-top: 24px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .prod-badge {
      display: inline-block;
      background: var(--brand-light);
      color: #0A1F1C;
      padding: 6px 16px;
      border-radius: 50px;
      font-weight: 800;
      font-size: 13px;
      margin-bottom: 20px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    /* Impact / Detail Section Replica */
    .impact-hero {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }

    .impact-title h2 {
      font-size: 42px;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 24px;
      letter-spacing: -0.01em;
    }

    .impact-essay {
      background: #fff;
      border: 1px solid #e7ece9;
      border-radius: 14px;
      box-shadow: var(--shadow-md);
      padding: 30px;
      position: relative;
      text-align: justify;
    }

    .impact-essay::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 6px;
      background: var(--gradient-brand);
      border-top-left-radius: 14px;
      border-bottom-left-radius: 14px;
    }

    .impact-essay p {
      margin: 12px 0;
      color: #4a5c56;
      line-height: 1.8;
      font-size: 16px;
    }

    .impact-essay .highlight {
      font-weight: 700;
      color: var(--brand-dark);
      font-style: italic;
      margin-top: 16px;
      display: block;
    }

    /* Detail Section */
    .detail-section {
      padding: 60px 60px;
      background: #fff;
    }

    .container {
      max-width: 1300px;
      margin: auto;
    }

    .detail-image {
      position: relative;
      border-radius: 24px;
      overflow: hidden;
      aspect-ratio: 4/3;
      margin-top: 20px;
    }

    .detail-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 1s ease, transform 0.5s ease;
    }

    .detail-image img.active {
      opacity: 1;
      z-index: 1;
    }

    .detail-image:hover img.active {
      transform: scale(1.05);
    }

    /* Responsive adjustments */
    @media (max-width: 1024px) {
      .impact-hero {
        gap: 32px;
      }

      .detail-section {
        padding: 80px 40px;
      }
    }

    @media (max-width: 768px) {
      .impact-hero {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .impact-title h2 {
        font-size: 32px;
      }

      .detail-section {
        padding: 60px 20px;
      }

      .impact-essay {
        padding: 20px;
      }
    }

    /* Usage Areas Section */
    .usage-section {
      background: #fff;
      padding: 60px 60px;
    }

    .usage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .usage-card {
      background: #fff;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-md);
      text-align: left;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .usage-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
    }

    .usage-image {
      height: 240px;
      overflow: hidden;
      position: relative;
      background: #eee;
    }

    .usage-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .usage-card:hover .usage-image img {
      transform: scale(1.05);
    }

    .usage-content {
      padding: 30px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .usage-content h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--dark);
    }

    .usage-content p {
      font-size: 16px;
      color: #555;
      line-height: 1.6;
      margin-bottom: 0;
    }

    /* Features Grid */
    .features-section {
      padding: 60px 60px 100px 60px;
      background: linear-gradient(180deg, #eef2ef, #e8eeea);
    }

    .section-title {
      text-align: center;
      margin-bottom: 15px;
    }

    .section-title h2 {
      font-size: 36px;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .section-title p {
      color: var(--gray);
      font-size: 18px;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .feature-card {
      position: relative;
      overflow: hidden;
      background: var(--card);
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      right: -60px;
      top: -60px;
      width: 180px;
      height: 180px;
      background: radial-gradient(closest-side, rgba(168, 179, 138, .35), rgba(168, 179, 138, 0));
      filter: blur(2px);
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .feature-card:hover {
      transform: translateY(-4px) !important;
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
    }

    .feature-card:hover::before {
      transform: scale(1.1);
      opacity: 0.5;
    }

    .feature-icon {
      width: 56px;
      height: 56px;
      border-radius: 12px;
      background: var(--gradient-brand);
      color: #0b1410;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px auto;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .feature-card:hover .feature-icon {
      transform: scale(1.08);
    }

    .feature-icon svg {
      width: 28px;
      height: 28px;
    }

    .feature-card h3 {
      font-size: 17px;
      font-weight: 900;
      color: #0a1f1c;
      margin: 0 0 14px;
      letter-spacing: 0.03em;
      text-transform: uppercase;
      line-height: 1.3;
    }

    .feature-card p {
      font-size: 15px;
      color: #4a5c56;
      line-height: 1.75;
      margin: 0;
      text-align: justify;
    }

    /* Tech Section */
    .tech-section {
      padding: 60px 60px;
      background: linear-gradient(180deg, #eef2ef, #e8eeea);
    }

    .tech-highlights {
      max-width: 1000px;
      margin: 0 auto 50px auto;
      display: grid;
      gap: 16px;
    }

    .tech-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 16px;
      color: #4a5c56;
      opacity: 0;
      transform: translateY(20px);
      /* Başlangıçta gizli ve aşağıda */
    }

    .tech-item svg {
      width: 20px;
      height: 20px;
      color: var(--brand-dark);
      flex-shrink: 0;
    }

    .tech-table-wrapper {
      max-width: 1000px;
      margin: 0 auto;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }

    .tech-table {
      width: 100%;
      border-collapse: collapse;
    }

    .tech-table th,
    .tech-table td {
      padding: 18px 24px;
      text-align: center;
      border-bottom: 1px solid #eee;
      font-size: 15px;
      color: var(--text);
    }

    .tech-row {
      opacity: 0;
      transform: translateY(20px);
    }

    .tech-table th {
      background: #f1f3f2;
      color: var(--dark);
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      font-size: 13px;
    }

    .tech-table tr:last-child td {
      border-bottom: none;
    }

    .tech-table tr:hover td {
      background: #fafbfc;
    }

    /* CTA Section */
    .cta-section {
      padding: 60px 60px;
      background: var(--dark);
      text-align: center;
      color: var(--dark);
      ;
      background: #fff;
    }

    .cta-section h2 {
      font-size: 36px;
      margin-bottom: 20px;
    }

    .cta-section p {
      font-size: 18px;
      opacity: 0.8;
      margin-bottom: 30px;
      max-width: 600px;
      margin-left: auto;
      margin-right: auto;
    }

    .btn-cta {
      display: inline-block;
      padding: 16px 40px;
      background: var(--gradient-brand);
      color: #0A1F1C;
      border-radius: 12px;
      font-weight: 800;
      text-decoration: none;
      font-size: 18px;
      transition: transform 0.2s, filter 0.2s;
      margin: 0 10px;
      /* Butonlar arası boşluk */
    }

    .btn-cta:hover {
      transform: translateY(-3px);
      filter: brightness(1.1);
    }

    /* Footer (Same as product.html) */
    .site-footer {
      margin-top: 0;
      background: #0a1f1c;
      color: #e8efe9;
    }

    .site-footer .container {
      max-width: 1300px;
      margin: auto;
      padding: 60px 60px 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 1fr;
      gap: 36px;
    }

    .footer-brand {
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }

    .footer-brand img {
      height: 36px;
      width: auto;
      max-width: 100%;
      object-fit: contain;
      flex-shrink: 0;
    }

    .footer-brand .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1;
      margin-top: 0;
      align-self: flex-start;
    }

    .footer-brand .wordmark {
      letter-spacing: 0.4em;
      font-weight: 800;
      font-size: 20px;
      color: #e8efe9;
    }

    .footer-brand .tagline {
      font-size: 9px;
      font-weight: 600;
      color: #d5dad5;
      opacity: .9;
      letter-spacing: .06em;
      margin-top: 2px;
    }

    .footer-brand {
      display: flex;
      gap: 20px;
    }

    .footer-brand .catchline {
      line-height: 1.5em;
      margin: 14px 0 10px;
      padding: 6px 0;
      font-weight: 800;
      font-size: 14px;
      letter-spacing: .02em;
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .footer-brand .social {
      display: flex;
      gap: 10px;
      margin-top: 4px;
    }

    .footer-brand .social a {
      width: 32px;
      height: 32px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--gradient-brand);
      color: #0b1410;
      border-radius: 999px;
      box-shadow: var(--shadow-sm);
      transition: transform .2s ease, filter .2s ease;
    }

    .footer-brand .social a:hover {
      transform: translateY(-2px);
      filter: brightness(1.06);
    }

    .footer-brand .social svg {
      width: 18px;
      height: 18px;
      display: block;
    }

    .footer-col h4 {
      font-size: 14px;
      letter-spacing: .08em;
      text-transform: uppercase;
      color: #cfe1d6;
      margin-bottom: 12px;
    }

    .footer-col a {
      display: block;
      color: #e8efe9;
      text-decoration: none;
      opacity: .9;
      padding: 6px 0;
      font-size: 14px;
    }

    .footer-col a:hover {
      opacity: 1;
      color: #fff;
    }

    .footer-contact p {
      font-size: 14px;
      opacity: .9;
      padding: 6px 0;
    }

    .contact-list {
      list-style: none;
      margin: 8px 0 0;
      padding: 0;
      display: grid;
      gap: 12px;
    }

    .contact-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }

    .contact-list .icon {
      color: #cfe1d6;
      line-height: 1;
      margin-top: 2px;
    }

    .contact-list a {
      color: #e8efe9;
      text-decoration: underline;
    }

    .contact-list a:hover {
      color: #fff;
    }

    .contact-list address {
      font-style: normal;
      color: #e8efe9;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-top: 1px solid rgba(255, 255, 255, .08);
      margin-top: 28px;
      padding-top: 18px;
      font-size: 13px;
      opacity: .9;
    }

    .footer-bottom a {
      color: #e8efe9;
      text-decoration: none;
      margin-left: 16px;
    }

    .footer-col:nth-of-type(3) a {
      position: relative;
      padding-left: 18px;
    }

    .footer-col:nth-of-type(3) a::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      width: 8px;
      height: 8px;
      transform: translateY(-50%);
      background: var(--gradient-brand);
      border-radius: 2px;
      box-shadow: 0 0 0 1px rgba(255, 255, 255, .25) inset;
    }

    .footer-col:nth-of-type(2) a {
      position: relative;
      padding-left: 18px;
    }

    .footer-col:nth-of-type(2) a::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      width: 8px;
      height: 8px;
      transform: translateY(-50%);
      background: var(--gradient-brand);
      border-radius: 2px;
      box-shadow: 0 0 0 1px rgba(255, 255, 255, .25) inset;
    }

    .footer-col:nth-of-type(2) h4::after {
      content: "";
      display: block;
      width: 44px;
      height: 2px;
      margin-top: 8px;
      background: var(--gradient-brand);
      border-radius: 2px;
    }

    .footer-col:nth-of-type(3) h4::after {
      content: "";
      display: block;
      width: 44px;
      height: 2px;
      margin-top: 8px;
      background: var(--gradient-brand);
      border-radius: 2px;
    }

    .footer-col:nth-of-type(4) h4::after {
      content: "";
      display: block;
      width: 44px;
      height: 2px;
      margin-top: 8px;
      background: var(--gradient-brand);
      border-radius: 2px;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .prod-hero h1 {
        font-size: 48px;
      }

      .detail-section,
      .tech-section,
      .usage-section {
        padding: 80px 40px;
      }

      .features-section {
        padding: 70px 40px 100px 40px;
      }

      .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
      }

      .feature-card {
        padding: 32px;
      }

      .usage-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .site-footer .container {
        padding: 50px 40px 20px;
      }

      .footer-grid {
        gap: 32px;
      }
    }

    @media (max-width: 768px) {


      .prod-hero {
        height: 70vh;
        min-height: 500px;
      }

      .prod-hero h1 {
        font-size: 36px;
      }

      .prod-hero p {
        font-size: 18px;
      }

      .detail-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }

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

      .detail-section,
      .tech-section,
      .usage-section {
        padding: 60px 20px;
      }

      .features-section {
        padding: 60px 20px 100px 20px;
      }

      .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .site-footer .container {
        padding: 40px 20px 20px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }

      /* CTA buttons fix for mobile */
      .btn-cta {
        display: block;
        width: 100%;
        max-width: 280px;
        margin: 12px auto;
      }
    }

    @media (max-width: 480px) {

      /* Footer Mobile Styles */
      .site-footer .container {
        padding: 35px 15px 18px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .footer-brand {
        flex-direction: row;
        gap: 10px;
        align-items: flex-start;
      }

      .footer-brand img {
        height: 28px;
        max-width: 100%;
        object-fit: contain;
        flex-shrink: 0;
      }

      .footer-brand .brand-text {
        margin-top: 0;
        align-self: flex-start;
      }

      .footer-brand .wordmark {
        font-size: 16px;
        letter-spacing: 0.25em;
      }

      .footer-brand .tagline {
        font-size: 8px;
      }

      .footer-brand .catchline {
        font-size: 11px;
        margin: 10px -35px 8px;
        line-height: 1.4;
      }

      .footer-brand .social {
        gap: 8px;
        margin-top: 10px;
        margin-left: -35px;
      }

      .footer-brand .social a {
        width: 28px;
        height: 28px;
      }

      .footer-brand .social svg {
        width: 15px;
        height: 15px;
      }

      .footer-col h4 {
        font-size: 11px;
        margin-bottom: 8px;
      }

      .footer-col a {
        font-size: 12px;
        padding: 4px 0;
      }

      .contact-list {
        gap: 10px;
      }

      .contact-list li {
        flex-direction: row;
        align-items: flex-start;
        gap: 8px;
      }

      .contact-list .icon {
        width: 18px;
        height: 18px;
        flex-shrink: 0;
        margin-top: 2px;
      }

      .contact-list .icon svg {
        width: 18px;
        height: 18px;
      }

      .contact-list a {
        font-size: 12px;
        word-break: break-word;
      }

      .contact-list address {
        font-size: 12px;
        line-height: 1.5;
      }

      .footer-bottom {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 6px;
        padding-top: 14px;
        margin-top: 20px;
        font-size: 11px;
      }

      .footer-bottom>div {
        width: auto;
      }

      .footer-bottom a {
        display: inline-block;
        margin: 0 6px 0 0;
        padding: 2px 0;
      }
    }

    /* Force-hide hamburger on desktop — base style (desktop-first §2.3) */

    /* Modal Styles */
    .modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      display: flex;
      justify-content: center;
      align-items: center;
      z-index: 2000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
      backdrop-filter: blur(4px);
      padding: 20px;
      overflow-y: auto;
    }

    .modal-overlay.active {
      opacity: 1;
      visibility: visible;
    }

    body.modal-open {
      overflow: hidden !important;
      position: fixed;
      width: 100%;
    }

    .modal-content {
      background: #fff;
      padding: 40px;
      border-radius: 24px;
      text-align: center;
      max-width: 400px;
      width: 90%;
      box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
      transform: translateY(20px);
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .modal-content.quote-modal {
      max-width: 600px;
      text-align: left;
      max-height: 90vh;
      overflow-y: auto;
      position: relative;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

    .modal-content.quote-modal::-webkit-scrollbar {
      display: none;
    }

    .modal-close {
      position: absolute;
      top: 16px;
      right: 20px;
      background: none;
      border: none;
      font-size: 32px;
      cursor: pointer;
      color: #666;
      transition: color 0.2s;
      line-height: 1;
    }

    .modal-close:hover {
      color: #0A1F1C;
    }

    .modal-overlay.active .modal-content {
      transform: translateY(0);
    }

    .modal-content h3 {
      font-size: 24px;
      font-weight: 800;
      color: #0A1F1C;
      margin-bottom: 8px;
      line-height: 1.3;
    }

    .modal-subtitle {
      color: var(--gray);
      font-size: 14px;
      margin-bottom: 24px;
    }

    /* Quote Form Styles */
    .quote-form .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .quote-form .form-group {
      margin-bottom: 18px;
    }

    .quote-form label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #333;
      margin-bottom: 6px;
    }

    .quote-form input,
    .quote-form select,
    .quote-form textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid #ddd;
      border-radius: 10px;
      transition: border-color 0.2s, box-shadow 0.2s;
      font-family: inherit;
      background: #fafafa;
    }

    .quote-form input:focus,
    .quote-form select:focus,
    .quote-form textarea:focus {
      outline: none;
      border-color: var(--brand-dark);
      box-shadow: 0 0 0 3px rgba(107, 119, 90, 0.15);
      background: #fff;
    }

    .quote-form textarea {
      resize: vertical;
      min-height: 80px;
    }

    .checkbox-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .checkbox-label {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #444;
      cursor: pointer;
      padding: 8px 14px;
      background: #f5f5f5;
      border-radius: 8px;
      transition: background 0.2s;
    }

    .checkbox-label:hover {
      background: #eee;
    }

    .checkbox-label input[type="checkbox"] {
      width: 16px;
      height: 16px;
      accent-color: var(--brand-dark);
    }

    .btn-submit {
      width: 100%;
      padding: 16px 24px;
      background: var(--gradient-brand);
      color: #0A1F1C;
      font-weight: 800;
      font-size: 15px;
      border: none;
      border-radius: 12px;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s;
      margin-top: 8px;
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .readonly-field {
      background: #e9ecef !important;
      color: #495057;
      font-weight: 600;
      cursor: not-allowed;
    }

    /* Success Modal */
    .modal-content.success-modal {
      max-width: 420px;
      text-align: center;
      padding: 48px 40px;
    }

    .success-icon {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: linear-gradient(135deg, #28a745, #5cb85c);
      color: #fff;
      font-size: 40px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 24px;
      box-shadow: 0 8px 24px rgba(40, 167, 69, 0.3);
    }

    .success-modal h3 {
      font-size: 22px;
      color: #0A1F1C;
      margin-bottom: 16px;
    }

    .success-modal p {
      font-size: 15px;
      color: #555;
      line-height: 1.6;
      margin: 0 0 8px;
    }

    .success-modal .success-note {
      font-weight: 600;
      color: #6B775A;
      margin-bottom: 24px;
    }

    .success-modal .btn-submit {
      max-width: 200px;
    }

    /* Modal Responsive */
    @media (max-width: 480px) {
      .modal-content.quote-modal {
        padding: 24px;
      }

      .quote-form .form-row {
        grid-template-columns: 1fr;
        gap: 0;
      }

      .checkbox-group {
        flex-direction: column;
      }
    }

    .btn-modal {
      display: inline-flex;
      padding: 14px 32px;
      background: var(--gradient-brand);
      color: #0A1F1C;
      font-weight: 800;
      text-decoration: none;
      border-radius: 99px;
      transition: transform 0.2s;
      font-size: 14px;
    }

    .btn-modal:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }

    /* §2.1 — 360px Breakpoint */
    @media (max-width: 360px) {
      .prod-hero h1 {
        font-size: 24px;
      }

      .prod-hero p {
        font-size: 15px;
      }

      .detail-section,
      .tech-section,
      .usage-section {
        padding: 40px 12px;
      }

      .features-section {
        padding: 40px 12px 80px 12px;
      }

      .feature-card {
        padding: 20px;
      }
    }

    /* §11.1 — Azaltılmış Hareket Tercihi */
    @media (prefers-reduced-motion: reduce) {

      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
    }

    /* §11.4 — Focus Visible Stilleri */
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid rgba(168, 179, 138, 0.8);
      outline-offset: 2px;
    }

    /* §11.2 — Hover sadece fare/trackpad cihazlarda */
    @media (hover: hover) and (pointer: fine) {
      .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
      }

      .usage-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
      }
    }