:root {
    --charcoal: #1C1F1A;
    --canvas: #F3EEE2;
    --copper: #C1652F;
    --forest: #2F3E2E;
    --steel: #7A8471;
    --line: rgba(28, 31, 26, .14);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--canvas);
    color: var(--charcoal);
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
  }

  h1,
  h2,
  h3,
  h4,
  .brand-font {
    font-family: 'Space Grotesk', sans-serif;
    letter-spacing: -0.01em;
  }

  .mono {
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: .02em;
  }

  /* ===== Guy-line divider — tekrarlanan çapraz çadır ipi motifi ===== */
  .tension-line {
    position: relative;
    height: 34px;
    overflow: hidden;
    margin: 0;
  }

  .tension-line svg {
    width: 100%;
    height: 100%;
    display: block;
  }

  /* ===== Header ===== */
  .site-header {
    background: var(--canvas);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 1000;
  }

  .navbar-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--charcoal);
    display: flex;
    align-items: center;
    gap: .55rem;
  }

  .navbar-brand .mark {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--charcoal);
    color: var(--canvas);
    border-radius: 3px;
  }

  .nav-link.custom-link {
    font-weight: 500;
    color: var(--charcoal) !important;
    position: relative;
    margin: 0 .6rem;
    cursor: pointer;
    opacity: .75;
  }

  .nav-link.custom-link.active {
    opacity: 1;
  }

  .nav-link.custom-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -4px;
    height: 2px;
    background: var(--copper);
  }

  .btn-teklif {
    background: var(--copper);
    color: #fff;
    font-weight: 600;
    border-radius: 2px;
    padding: .55rem 1.35rem;
    border: none;
    transition: transform .15s ease, background .15s ease;
  }

  .btn-teklif:hover {
    background: #a8531f;
    color: #fff;
    transform: translateY(-1px);
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: flex-end;
    background:
      linear-gradient(180deg, rgba(17, 20, 15, .35) 0%, rgba(17, 20, 15, .85) 100%),
      url('images/kiralik-cadir.jpg') center/cover no-repeat;
    color: var(--canvas);
    overflow: hidden;
  }

  .hero::before {
    /* truss / iskelet çizgileri — arka planda ince yapı hissi */
    content: "";
    position: absolute;
    inset: 0;
    background-image:
      repeating-linear-gradient(115deg, rgba(243, 238, 226, .05) 0 1px, transparent 1px 90px),
      repeating-linear-gradient(25deg, rgba(243, 238, 226, .05) 0 1px, transparent 1px 90px);
    pointer-events: none;
  }

  .hero-eyebrow {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .8rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--copper);
    border: 1px solid rgba(243, 238, 226, .35);
    display: inline-block;
    padding: .3rem .7rem;
    border-radius: 2px;
    margin-bottom: 1.2rem;
  }

  .hero h1 {
    font-size: clamp(2.3rem, 5vw, 4rem);
    font-weight: 700;
    max-width: 820px;
    line-height: 1.08;
  }

  .hero p.lead {
    max-width: 560px;
    color: rgba(243, 238, 226, .85);
    font-size: 1.1rem;
  }

  .hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 2.2rem;
    padding-top: 1.6rem;
    border-top: 1px solid rgba(243, 238, 226, .25);
  }

  .hero-stats .num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--canvas);
  }

  .hero-stats .lbl {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .72rem;
    color: rgba(243, 238, 226, .65);
    text-transform: uppercase;
    letter-spacing: .06em;
  }

  /* ===== Genel bölüm başlıkları ===== */
  .section {
    padding: 5.5rem 0;
  }

  .section-eyebrow {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .78rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: .6rem;
    display: block;
  }

  .section-title {
    font-size: clamp(1.7rem, 3vw, 2.4rem);
    font-weight: 700;
    margin-bottom: 1rem;
  }

  /* ===== Özellik kartları ===== */
  .feature-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 2rem 1.6rem;
    height: 100%;
    transition: transform .18s ease, box-shadow .18s ease;
  }

  .feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 28px rgba(28, 31, 26, .08);
  }

  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 3px;
    background: var(--forest);
    color: var(--canvas);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
  }

  /* ===== Hakkımızda ===== */
  .about-img-wrap {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
  }

  .about-img-wrap img {
    width: 100%;
    display: block;
  }

  .about-badge {
    position: absolute;
    bottom: -1px;
    right: -1px;
    background: var(--copper);
    color: #fff;
    padding: 1.1rem 1.4rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    text-align: center;
    line-height: 1.1;
  }

  .about-badge small {
    display: block;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: .65rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-top: .25rem;
    opacity: .9;
  }

  .checklist {
    list-style: none;
    padding: 0;
    margin: 1.4rem 0;
  }

  .checklist li {
    padding-left: 1.7rem;
    position: relative;
    margin-bottom: .7rem;
  }

  .checklist li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .35rem;
    width: 10px;
    height: 10px;
    background: var(--copper);
  }

  /* ===== Blueprint tarzı ürün kartı (imza öğe) ===== */
  .spec-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    padding: 0;
    overflow: hidden;
    height: 100%;
  }

  .spec-card .corner {
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid var(--copper);
    z-index: 2;
  }

  .spec-card .corner.tl {
    top: 10px;
    left: 10px;
    border-right: none;
    border-bottom: none;
  }

  .spec-card .corner.tr {
    top: 10px;
    right: 10px;
    border-left: none;
    border-bottom: none;
  }

  .spec-card .corner.bl {
    bottom: 10px;
    left: 10px;
    border-right: none;
    border-top: none;
  }

  .spec-card .corner.br {
    bottom: 10px;
    right: 10px;
    border-left: none;
    border-top: none;
  }

  .spec-card .img-box {
    height: 220px;
    overflow: hidden;
  }

  .spec-card .img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
  }

  .spec-card:hover .img-box img {
    transform: scale(1.06);
  }

  .spec-card .body {
    padding: 1.5rem;
  }

  .spec-card .cat-tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--forest);
    background: rgba(47, 62, 46, .08);
    padding: .2rem .5rem;
    border-radius: 2px;
  }

  .spec-card h3 {
    font-size: 1.2rem;
    margin: .7rem 0 .5rem;
  }

  .spec-card p {
    font-size: .92rem;
    color: #4a4a45;
    margin-bottom: 0;
  }

  /* ===== İletişim ===== */
  .contact-panel {
    background: var(--charcoal);
    color: var(--canvas);
    border-radius: 4px;
    padding: 2.4rem;
    height: 100%;
  }

  .contact-row {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(243, 238, 226, .15);
  }

  .contact-row:last-child {
    border-bottom: none;
  }

  .contact-row .ic {
    width: 38px;
    height: 38px;
    flex: none;
    background: var(--copper);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
  }

  .contact-row .lbl {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--steel);
    display: block;
  }

  .form-control {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 3px;
    padding: .75rem .9rem;
  }

  .form-control:focus {
    border-color: var(--copper);
    box-shadow: 0 0 0 3px rgba(193, 101, 47, .15);
  }

  .btn-send {
    background: var(--forest);
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: 3px;
    padding: .8rem 1.6rem;
  }

  .btn-send:hover {
    background: #243a22;
    color: #fff;
  }

  .map-frame {
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--line);
    height: 260px;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--charcoal);
    color: rgba(243, 238, 226, .75);
    padding: 3.5rem 0 1.5rem;
  }

  .site-footer h5 {
    color: var(--canvas);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    margin-bottom: 1.1rem;
  }

  .footer-links {
    list-style: none;
    padding: 0;
  }

  .footer-links li {
    margin-bottom: .55rem;
  }

  .footer-links a {
    color: rgba(243, 238, 226, .75);
    text-decoration: none;
    font-size: .92rem;
    cursor: pointer;
  }

  .footer-links a:hover {
    color: var(--copper);
  }

  .social-ic {
    width: 36px;
    height: 36px;
    border: 1px solid rgba(243, 238, 226, .25);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--canvas);
    text-decoration: none;
    margin-right: .5rem;
  }

  .social-ic:hover {
    background: var(--copper);
    border-color: var(--copper);
  }

  .footer-bottom {
    border-top: 1px solid rgba(243, 238, 226, .15);
    margin-top: 2.5rem;
    padding-top: 1.3rem;
    font-size: .82rem;
    color: rgba(243, 238, 226, .5);
  }

  /* ===== Breadcrumb ===== */
  .breadcrumb-bar {
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: .8rem 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: .78rem;
  }

  .breadcrumb-bar a {
    color: var(--steel);
    text-decoration: none;
  }

  .breadcrumb-bar a:hover {
    color: var(--copper);
  }

  .breadcrumb-bar span.sep {
    margin: 0 .4rem;
    color: var(--steel);
  }

  .breadcrumb-bar span.cur {
    color: var(--charcoal);
  }

  /* ===== İlçe etiketleri (yerel SEO) ===== */
  .district-chips {
    list-style: none;
    padding: 0;
    margin: 1.2rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
  }

  .district-chips li {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .78rem;
    background: #fff;
    border: 1px solid var(--line);
    padding: .4rem .8rem;
    border-radius: 20px;
  }

  /* ===== SSS ===== */
  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 1.3rem 1.5rem;
    margin-bottom: 1rem;
  }

  .faq-item h3 {
    font-size: 1.02rem;
    margin-bottom: .5rem;
  }

  .faq-item p {
    margin-bottom: 0;
    color: #4a4a45;
    font-size: .95rem;
  }

  /* ===== İçindekiler ===== */
  .toc-box {
    background: #fff;
    border: 1px solid var(--line);
    border-left: 3px solid var(--copper);
    border-radius: 3px;
    padding: 1.3rem 1.5rem;
    margin-bottom: 2rem;
  }

  .toc-box .toc-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--copper);
    display: block;
    margin-bottom: .6rem;
  }

  .toc-box ul {
    margin: 0;
    padding-left: 1.1rem;
  }

  .toc-box li {
    margin-bottom: .35rem;
    font-size: .92rem;
  }

  .toc-box a {
    color: var(--charcoal);
    text-decoration: none;
  }

  .toc-box a:hover {
    color: var(--copper);
  }

  /* ===== Ürün detay bölümü ===== */
  .product-detail {
    padding: 3.2rem 0;
    border-bottom: 1px solid var(--line);
  }

  .product-detail:last-child {
    border-bottom: none;
  }

  .product-detail .img-frame {
    border-radius: 4px;
    overflow: hidden;
  }

  .product-detail .img-frame img {
    width: 100%;
    display: block;
  }

  .spec-table {
    width: 100%;
    font-size: .92rem;
    margin-top: 1.2rem;
  }

  .spec-table td {
    padding: .5rem .2rem;
    border-bottom: 1px solid var(--line);
  }

  .spec-table td:first-child {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .78rem;
    color: var(--steel);
    width: 40%;
    text-transform: uppercase;
    letter-spacing: .04em;
  }

  @media (max-width: 767px) {
    .hero-stats {
      flex-wrap: wrap;
      gap: 1.4rem;
    }

    .section {
      padding: 3.5rem 0;
    }
  }