: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%;
    }

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

    video {
      display: block;
      max-width: 100%;
    }

    body {
      font-family: 'Inter', sans-serif;
      background: linear-gradient(180deg, #F8FAF9 0%, #F4F6F6 100%);
      color: var(--text);
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* Skip link for accessibility */
    .skip-link {
      position: absolute;
      left: -9999px;
      top: auto;
      width: 1px;
      height: 1px;
      overflow: hidden;
    }

    .skip-link:focus {
      left: 16px;
      top: 16px;
      width: auto;
      height: auto;
      background: #fff;
      color: #0A1F1C;
      padding: 8px 12px;
      border-radius: 8px;
      z-index: 1001;
    }

    /* Page header (Hero) */
    .page-header {
      width: 100%;
      min-height: 100vh;
      /* Fallback for older browsers */
      min-height: 100svh;
      /* Dynamic viewport height for mobile */
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      padding: 0;
      margin: 0;
      background: url('../product/hero.webp') no-repeat center center;
      background-size: cover;
      position: relative;
      text-align: center;
      color: #fff;
      overflow: hidden;
      /* Taşmaları gizle */
    }

    /* Overlay */
    .page-header::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(10, 31, 28, 0.75) 0%, rgba(10, 31, 28, 0.6) 100%);
      z-index: 1;
    }

    .page-header .inner {
      max-width: 1000px;
      margin: auto;
      padding: 0 30px;
      position: relative;
      z-index: 2;
    }

    .page-header h1 {
      font-size: 64px;
      font-weight: 900;
      letter-spacing: -0.03em;
      color: #fff;
      margin-bottom: 20px;
      text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    .page-header p {
      font-size: 20px;
      color: rgba(255, 255, 255, 0.92);
      max-width: 800px;
      margin: 0 auto;
      line-height: 1.6;
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
      font-weight: 500;
    }

    /* Filter section - Segmented Control Style */
    .filter-container {
      display: inline-flex;
      justify-content: center;
      gap: 4px;
      margin-bottom: 50px;
      position: relative;
      z-index: 5;
      background: #f1f3f2;
      padding: 6px;
      border-radius: 99px;
      box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.04);
    }

    .filter-container-wrapper {
      text-align: center;
      /* Ortalamak için wrapper */
    }

    .filter-btn {
      padding: 12px 28px;
      font-weight: 700;
      font-size: 14px;
      border: none;
      cursor: pointer;
      background: transparent;
      color: #6b7c76;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border-radius: 99px;
      border-bottom: none;
    }

    .filter-btn:hover {
      color: #0a1f1c;
    }

    .filter-btn.active {
      background: #fff;
      color: #0a1f1c;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    /* Products section */
    .products-section {
      padding: 60px 60px 100px;
      background: #fff;
      position: relative;
      z-index: 2;
      margin-top: 0;
      /* Negatif margin kaldırıldı, tam ekran hero için */
      border-radius: 0;
    }

    /* Products Grid - Modern Flex Structure */
    .products-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 30px;
      margin-top: 50px;
      max-width: 1400px;
      margin-left: auto;
      margin-right: auto;
    }

    /* Professional Interactive Product Card */
    .product-card {
      position: relative;
      /* 3 sütunlu yapı: (100% - (2 * 30px gap)) / 3 */
      width: calc((100% - 60px) / 3);
      flex: 0 0 calc((100% - 60px) / 3);
      /* Genişliği sabitle */
      min-width: 300px;
      /* Çok küçülmesin */
      height: 500px;
      /* Biraz daha uzun olsun */
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
      cursor: pointer;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      background: #fff;
      border: 1px solid #eee;
    }

    /* Tablette 2 sütun */
    @media (max-width: 1024px) {
      .product-card {
        width: calc((100% - 30px) / 2);
        flex: 0 0 calc((100% - 30px) / 2);
      }
    }

    .product-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    }

    /* Image Area */
    .product-image {
      width: 100%;
      height: 100% !important;
      /* Yüksekliği zorla */
      object-fit: cover;
      object-position: center;
      background: #fff;
      transition: transform 0.6s ease;
      display: block;
      /* Block level yap */
      position: absolute;
      /* Kartın içine tam oturması için */
      inset: 0;
      /* Top, right, bottom, left 0 */
      z-index: 1;
    }

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

    /* Content Area */
    .product-content {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 100%;
      /* Tüm alanı kapla */
      padding: 30px;
      background: transparent;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      /* Normalde altta */
      align-items: flex-start;
      /* Normalde solda */
      z-index: 2;
      transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
      /* Çok daha yumuşak ease-out */
      pointer-events: none;
    }

    /* Hover Interaction - Background */
    .product-card:hover .product-content {
      background: rgba(10, 31, 28, 0.92);
      backdrop-filter: blur(4px);
      justify-content: center;
      /* Dikeyde ortala */
      align-items: center;
      /* Yatayda ortala */
      pointer-events: auto;
    }

    /* Typography & Animations */
    .product-name {
      font-size: 26px;
      font-weight: 900;
      margin: 0 0 4px 0;
      width: 100%;
      /* Genişliği garantile */
      color: #fff;
      text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
      transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1);
      /* Yumuşak geçiş */
      transform-origin: center center;
      /* Merkezden büyü */
      text-align: left;
      /* Normalde sola dayalı */
    }

    .product-card:hover .product-name {
      transform: translateY(-10px) scale(1.1);
      text-align: center;
      /* Hoverda ortala */
      color: #ffffff !important;
      /* Beyaz renk zorlama */
      text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
      /* Hafif gölge ile belirginleştir */
      margin-bottom: 16px;
    }

    .product-description {
      font-size: 15px;
      line-height: 1.6;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 0;
      width: 100%;

      /* Başlangıçta gizli */
      opacity: 0;
      height: 0;
      overflow: hidden;
      transform: translateY(20px);
      transition: all 0.5s ease 0.1s;
      /* Hafif gecikmeli */
      text-align: center;
    }

    .product-card:hover .product-description {
      opacity: 1;
      height: auto;
      transform: translateY(0);
      margin-bottom: 30px;
    }

    /* "İncele" Butonu Efekti */
    .product-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 12px 28px;
      /* Biraz daha geniş */
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: 50px;
      font-weight: 700;
      font-size: 13px;
      color: #fff;
      opacity: 0;
      transform: translateY(20px);
      transition: all 0.5s ease 0.2s;
      /* Daha geç gelsin */
      text-transform: uppercase;
      letter-spacing: 0.08em;
      /* align-self:center zaten flex container center olduğu için gereksiz ama kalabilir */
    }

    .product-action:hover {
      background: #fff;
      color: #0a1f1c;
      /* Hoverda yeşil yazı */
    }

    .product-card:hover .product-action {
      opacity: 1;
      transform: translateY(0);
    }

    .product-action svg {
      transition: transform 0.3s ease;
    }

    .product-card:hover .product-action svg {
      transform: translateX(5px);
    }

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

    /* Medya Sorguları */
    @media (max-width: 768px) {

      /* Header adjustments for mobile */
      header {
        padding: 14px 18px;
      }

      header.shrink {
        padding: 10px 16px;
      }

      .main-nav {
        display: none;
      }

      #menuToggle {
        display: inline-flex !important;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
      }

      .header-right {
        margin-left: auto;
      }

      .product-card {
        height: 420px;
        flex: 1 1 100%;
      }
    }

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

    .product-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;
    }

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

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

    .product-image {
      width: 100%;
      height: 280px;
      object-fit: cover;
      display: block;
      background: #f0f0f0;
    }

    .product-content {
      padding: 28px;
    }

    .product-name {
      font-size: 24px;
      font-weight: 900;
      color: #0a1f1c;
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }

    .product-description {
      font-size: 15px;
      color: #4a5c56;
      line-height: 1.7;
      margin: 0;
    }

    /* Footer */
    .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;
    }

    /* Top scroll progress bar */
    #progressBar {
      position: fixed;
      left: 0;
      top: 0;
      height: 3px;
      width: 0%;
      background: var(--gradient-brand);
      z-index: 1000;
      transform-origin: 0 50%;
    }

    /* hamburger hidden by base style */

    @media (max-width: 1024px) {
      .page-header {
        padding-top: 160px;
        padding-bottom: 80px;
        margin-top: -80px;
      }

      .page-header h1 {
        font-size: 48px;
      }

      .products-section {
        padding: 50px 40px 80px;
      }

      /* Grid kuralları kaldırıldı, yukarıdaki yeni flex kuralları geçerli */
      .site-footer .container {
        padding: 50px 40px 20px;
      }

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

    @media (max-width: 768px) {
      header {
        padding: 14px 18px;
      }

      header.shrink {
        padding: 10px 16px;
      }

      .main-nav {
        display: none;
      }

      #menuToggle {
        display: inline-flex !important;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 6px;
      }

      .header-right {
        margin-left: auto;
      }

      .page-header {
        padding-top: 140px;
        padding-bottom: 60px;
      }

      .page-header .inner {
        padding: 0 20px;
      }

      .page-header h1 {
        font-size: 36px;
      }

      .page-header p {
        font-size: 16px;
      }

      .products-section {
        padding: 40px 20px 60px;
        border-radius: 0;
      }

      /* Grid kuralları kaldırıldı */
      .product-image {
        height: 240px;
      }

      .product-content {
        padding: 24px;
      }

      .product-name {
        font-size: 22px;
      }

      .footer-bottom {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        padding-top: 16px;
        margin-top: 24px;
        font-size: 12px;
      }

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

      .footer-bottom a {
        display: inline-block;
        margin: 0 8px 0 0;
      }

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

      .footer-brand img {
        height: 30px;
        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: 17px;
        letter-spacing: 0.3em;
      }

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

      .footer-brand .catchline {
        font-size: 12px;
        margin: 12px 0 8px;
      }

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

      .footer-brand .social a {
        width: 30px;
        height: 30px;
      }

      .footer-brand .social svg {
        width: 16px;
        height: 16px;
      }

      .footer-col h4 {
        font-size: 12px;
        margin-bottom: 10px;
      }

      .footer-col a {
        font-size: 13px;
        padding: 5px 0;
      }

      .contact-list {
        gap: 12px;
      }

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

      .contact-list .icon {
        flex-shrink: 0;
        margin-top: 3px;
      }

      .contact-list a {
        font-size: 13px;
        word-break: break-word;
      }

      .contact-list address {
        font-size: 13px;
        line-height: 1.5;
      }
    }

    @media (max-width: 480px) {
      .page-header h1 {
        font-size: 28px;
      }

      .products-grid {
        gap: 20px;
      }

      .product-image {
        height: 200px;
      }

      /* 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;
      }
    }

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

      .page-header p {
        font-size: 15px;
      }

      .products-section {
        padding: 40px 12px 60px;
      }
    }

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