/* Kaynak: single-blog.html. Elle değiştirmeyin; bin/sync-design-assets.php ile yenilenir. */
:root {
      color-scheme: light;

      --surface-page: #f6f8f6;
      --surface-primary: #ffffff;
      --surface-secondary: #f1f5f2;
      --surface-tertiary: #eaf2ed;

      --label-primary: #152019;
      --label-secondary: #5f6b64;
      --label-tertiary: #7d8881;

      --separator: #e0e7e2;
      --separator-strong: #cfdad2;

      --accent: #087a4c;
      --accent-hover: #06643e;
      --accent-soft: #e9f5ee;

      --radius-sm: .5rem;
      --radius-md: .75rem;
      --radius-lg: 1rem;
      --radius-pill: 999px;

      --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
        "Helvetica Neue", "Segoe UI", Arial, sans-serif;

      --font-mono: "SFMono-Regular", Consolas, monospace;

      --control-hit-min: 2.75rem;
      --content-app: 75rem;
      --content-reading: 46rem;

      --shadow-floating: 0 18px 50px rgba(25,49,34,.12);
      --shadow-card-hover: 0 10px 26px rgba(25,49,34,.07);

      --motion-fast: 160ms;
      --ease-standard: cubic-bezier(.2,.8,.2,1);
    }

    * { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      background: var(--surface-page);
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      background: var(--surface-page);
      color: var(--label-primary);
      font-family: var(--font-sans);
      font-size: 15px;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    a { color: inherit; text-decoration: none; }
    button { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }

    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(8,122,76,.30);
      outline-offset: 3px;
    }

    .container {
      width: min(var(--content-app), calc(100% - 2.5rem));
      margin-inline: auto;
    }

    /* Header */
    .header {
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid rgba(207,218,210,.78);
      background: rgba(255,255,255,.90);
      backdrop-filter: saturate(150%) blur(16px);
      -webkit-backdrop-filter: saturate(150%) blur(16px);
    }

    .header-inner {
      min-height: 64px;
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .logo {
      min-height: var(--control-hit-min);
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -.03em;
    }

    .logo-mark {
      width: 32px;
      height: 32px;
      display: grid;
      place-items: center;
      border-radius: 10px;
      background: var(--accent);
      color: #fff;
      font-size: 14px;
      font-weight: 700;
    }

    .logo em { color: var(--accent); font-style: normal; }

    .nav {
      display: flex;
      align-items: center;
      gap: 2px;
      margin-left: auto;
    }

    .nav a {
      min-height: var(--control-hit-min);
      display: inline-flex;
      align-items: center;
      border-radius: var(--radius-sm);
      padding: 0 12px;
      color: #465249;
      font-size: 13px;
      font-weight: 550;
    }

    .nav a:hover,
    .nav a.active {
      background: rgba(118,118,128,.08);
      color: var(--accent);
    }

    .header-action,
    .menu-button {
      min-width: var(--control-hit-min);
      min-height: var(--control-hit-min);
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: rgba(255,255,255,.72);
      color: var(--label-primary);
      cursor: pointer;
    }

    .header-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 14px;
      font-size: 12px;
      font-weight: 650;
    }

    .menu-button { display: none; }

    /* Breadcrumb */
    .breadcrumb-wrap {
      border-bottom: 1px solid var(--separator);
      background: var(--surface-primary);
    }

    .breadcrumb {
      min-height: 46px;
      display: flex;
      align-items: center;
      gap: 8px;
      overflow-x: auto;
      white-space: nowrap;
      color: var(--label-tertiary);
      font-size: 11px;
    }

    .breadcrumb a:hover { color: var(--accent); }
    .breadcrumb span:last-child { color: var(--label-secondary); }

    /* Article hero */
    .article-hero {
      padding: 48px 0 42px;
      border-bottom: 1px solid var(--separator);
      background:
        radial-gradient(circle at 78% -18%, rgba(8,122,76,.08), transparent 34rem),
        var(--surface-secondary);
    }

    .article-hero-inner {
      max-width: 900px;
    }

    .article-category {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--accent);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
    }

    .article-category::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    h1, h2, h3 {
      margin-top: 0;
      color: var(--label-primary);
      font-family: var(--font-sans);
    }

    h1 {
      max-width: 860px;
      margin: 14px 0 14px;
      font-size: clamp(38px, 5vw, 56px);
      line-height: 1.04;
      letter-spacing: -.045em;
    }

    .article-lead {
      max-width: 760px;
      margin: 0;
      color: var(--label-secondary);
      font-size: 17px;
      line-height: 1.65;
      letter-spacing: -.01em;
    }

    .article-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
      color: var(--label-tertiary);
      font-size: 10px;
    }

    .article-meta i {
      width: 3px;
      height: 3px;
      border-radius: 50%;
      background: currentColor;
    }

    .article-trust {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      margin-top: 20px;
      border: 1px solid var(--separator);
      border-radius: 999px;
      background: rgba(255,255,255,.72);
      padding: 7px 13px 7px 7px;
    }

    .trust-mark {
      width: 32px;
      height: 32px;
      display: grid;
      place-items: center;
      flex: 0 0 32px;
    }

    .trust-mark img { width: 28px; height: 28px; display: block; }

    .article-trust strong,
    .article-trust small { display: block; }
    .article-trust strong { font-size: 11px; }
    .article-trust small { margin-top: 2px; color: var(--label-secondary); font-size: 9px; }

    /* Article layout */
    .article-section {
      padding: 42px 0 64px;
      background: var(--surface-primary);
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, var(--content-reading)) 280px;
      gap: 48px;
      align-items: start;
    }

    .article-body {
      min-width: 0;
    }

    .article-cover {
      margin: 0 0 34px;
      overflow: hidden;
      border-radius: var(--radius-lg);
      background: var(--surface-secondary);
    }

    .article-cover img {
      width: 100%;
      height: auto;
      display: block;
    }

    .article-body img {
      max-width: 100%;
      height: auto;
    }

    .article-body p,
    .article-body li {
      color: #39433d;
      font-size: 16px;
      line-height: 1.78;
    }

    .article-body p {
      margin: 0 0 18px;
    }

    .article-body h2 {
      margin: 42px 0 14px;
      font-size: 28px;
      line-height: 1.18;
      letter-spacing: -.035em;
    }

    .article-body h3 {
      margin: 30px 0 10px;
      font-size: 20px;
      line-height: 1.25;
      letter-spacing: -.025em;
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 22px;
      padding-left: 24px;
    }

    .article-body li + li {
      margin-top: 8px;
    }

    .article-body strong {
      color: var(--label-primary);
    }

    .article-body a {
      color: var(--accent);
      font-weight: 650;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-body table {
      width: 100%;
      margin: 24px 0 28px;
      border: 1px solid var(--separator);
      border-collapse: collapse;
      background: #fff;
      font-variant-numeric: tabular-nums;
    }

    .article-body th,
    .article-body td {
      min-width: 120px;
      border: 1px solid var(--separator);
      padding: 11px 13px;
      color: #39433d;
      font-size: 12px;
      line-height: 1.5;
      text-align: left;
      vertical-align: top;
    }

    .article-body th {
      background: var(--surface-secondary);
      color: var(--label-primary);
      font-weight: 700;
    }

    .article-body code {
      font-family: var(--font-mono);
    }

    .callout {
      margin: 28px 0;
      border-left: 3px solid var(--accent);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      background: var(--accent-soft);
      padding: 16px 18px;
    }

    .callout strong {
      display: block;
      margin-bottom: 5px;
      color: var(--accent-hover);
      font-size: 12px;
    }

    .callout p {
      margin: 0;
      color: #4b6657;
      font-size: 13px;
      line-height: 1.65;
    }

    .formula {
      margin: 24px 0;
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: var(--surface-page);
      padding: 18px 20px;
    }

    .formula strong {
      display: block;
      margin-bottom: 8px;
      font-size: 13px;
    }

    .formula code {
      display: block;
      color: var(--accent-hover);
      font-size: 13px;
      line-height: 1.7;
      white-space: normal;
    }

    .example-box {
      margin: 28px 0;
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: #fff;
      padding: 20px;
    }

    .example-box h3 {
      margin-top: 0;
      font-size: 17px;
    }

    .example-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 10px;
      margin-top: 14px;
    }

    .example-stat {
      border-radius: var(--radius-sm);
      background: var(--surface-secondary);
      padding: 14px;
    }

    .example-stat span {
      display: block;
      color: var(--label-tertiary);
      font-size: 10px;
    }

    .example-stat strong {
      display: block;
      margin-top: 4px;
      font-size: 15px;
      font-variant-numeric: tabular-nums;
    }

    /* Tool CTA */
    .tool-cta {
      margin: 34px 0;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
      border: 1px solid rgba(8,122,76,.24);
      border-radius: var(--radius-lg);
      background: linear-gradient(135deg, #f2f8f4, #eaf5ee);
      padding: 22px;
    }

    .tool-cta h3 {
      margin: 0 0 6px;
      font-size: 18px;
    }

    .tool-cta p {
      margin: 0;
      color: var(--label-secondary);
      font-size: 12px;
      line-height: 1.6;
    }

    .tool-cta a {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-md);
      background: var(--accent);
      padding: 0 16px;
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      text-decoration: none;
      white-space: nowrap;
    }

    .tool-cta a:hover { background: var(--accent-hover); }

    /* Table of contents/sidebar */
    .article-sidebar {
      position: sticky;
      top: 88px;
      display: grid;
      gap: 14px;
    }

    .toc,
    .side-panel {
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: var(--surface-page);
      padding: 18px;
    }

    .toc h3,
    .side-panel h3 {
      margin: 0 0 10px;
      font-size: 14px;
      font-weight: 650;
    }

    .toc nav {
      display: grid;
      gap: 2px;
    }

    .toc a {
      min-height: 38px;
      display: flex;
      align-items: center;
      border-radius: var(--radius-sm);
      padding: 0 9px;
      color: var(--label-secondary);
      font-size: 11px;
      line-height: 1.4;
    }

    .toc a:hover {
      background: var(--surface-tertiary);
      color: var(--accent);
    }

    .toc .toc-h3 {
      min-height: 32px;
      padding-left: 20px;
      font-size: 10px;
    }

    .side-panel p {
      margin: 0;
      color: var(--label-secondary);
      font-size: 11px;
      line-height: 1.55;
    }

    .side-panel a {
      min-height: 40px;
      display: inline-flex;
      align-items: center;
      margin-top: 8px;
      color: var(--accent);
      font-size: 11px;
      font-weight: 700;
    }

    .side-panel button {
      min-height: 40px;
      display: inline-flex;
      align-items: center;
      margin-top: 10px;
      border: 1px solid rgba(8,122,76,.24);
      border-radius: var(--radius-sm);
      background: var(--accent-soft);
      padding: 0 12px;
      color: var(--accent);
      cursor: pointer;
      font: inherit;
      font-size: 11px;
      font-weight: 700;
    }

    /* Author/review */
    .article-footer-box {
      margin-top: 44px;
      padding-top: 24px;
      border-top: 1px solid var(--separator);
    }

    .article-footer-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 14px;
    }

    .meta-card {
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: var(--surface-page);
      padding: 16px;
    }

    .meta-card span {
      display: block;
      color: var(--label-tertiary);
      font-size: 10px;
      font-weight: 650;
      text-transform: uppercase;
      letter-spacing: .06em;
    }

    .meta-card strong {
      display: block;
      margin-top: 6px;
      font-size: 13px;
    }

    .meta-card p {
      margin: 5px 0 0;
      color: var(--label-secondary);
      font-size: 11px;
      line-height: 1.55;
    }

    /* Related */
    .related {
      padding: 58px 0 66px;
      border-top: 1px solid var(--separator);
      background: var(--surface-page);
    }

    .section-kicker {
      color: var(--accent);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
    }

    .related h2 {
      margin: 6px 0 18px;
      font-size: 28px;
      letter-spacing: -.035em;
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 12px;
    }

    .related-card {
      min-height: 170px;
      display: flex;
      flex-direction: column;
      border: 1px solid var(--separator);
      border-radius: var(--radius-md);
      background: #fff;
      padding: 18px;
      transition:
        border-color var(--motion-fast) var(--ease-standard),
        box-shadow var(--motion-fast) var(--ease-standard);
    }

    .related-card:hover {
      border-color: #b9cabe;
      box-shadow: var(--shadow-card-hover);
    }

    .related-card .tag {
      color: var(--accent);
      font-size: 10px;
      font-weight: 700;
    }

    .related-card h3 {
      margin: 16px 0 8px;
      font-size: 16px;
      line-height: 1.35;
      letter-spacing: -.02em;
      display: -webkit-box;
      overflow: hidden;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 2;
    }

    .related-card p {
      margin: 0;
      color: var(--label-secondary);
      font-size: 11px;
      line-height: 1.55;
      display: -webkit-box;
      overflow: hidden;
      -webkit-box-orient: vertical;
      -webkit-line-clamp: 2;
    }

    .related-card .go {
      margin-top: auto;
      padding-top: 16px;
      color: var(--accent);
      font-size: 11px;
      font-weight: 700;
    }

    /* FAQ */
    .faq {
      padding: 58px 0 66px;
      border-top: 1px solid var(--separator);
      background: #fff;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: .75fr 1.25fr;
      gap: 48px;
      align-items: start;
    }

    .faq-intro p {
      max-width: 360px;
      margin: 12px 0 0;
      color: var(--label-secondary);
      font-size: 12px;
      line-height: 1.65;
    }

    .faq-list {
      border-top: 1px solid var(--separator);
    }

    .faq-item {
      border-bottom: 1px solid var(--separator);
    }

    .faq-item summary {
      position: relative;
      list-style: none;
      min-height: 60px;
      display: flex;
      align-items: center;
      cursor: pointer;
      padding: 14px 48px 14px 0;
      font-size: 14px;
      font-weight: 650;
    }

    .faq-item summary::-webkit-details-marker { display: none; }

    .faq-item summary::after {
      content: "+";
      position: absolute;
      right: 2px;
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(118,118,128,.09);
      color: var(--label-secondary);
      font-size: 18px;
      font-weight: 450;
    }

    .faq-item[open] summary::after {
      transform: rotate(45deg);
      background: var(--accent-soft);
      color: var(--accent);
    }

    .faq-answer {
      max-width: 700px;
      padding: 0 48px 18px 0;
      color: var(--label-secondary);
      font-size: 12px;
      line-height: 1.7;
    }

    /* Footer */
    .site-map {
      border-top: 1px solid #263c31;
      background: #10291f;
      color: #fff;
    }

    .site-map-inner {
      display: grid;
      grid-template-columns: 1.5fr repeat(3,1fr);
      gap: 42px;
      padding: 44px 0 40px;
    }

    .footer-brand p {
      max-width: 280px;
      margin: 12px 0 0;
      color: #9eb3a8;
      font-size: 11px;
      line-height: 1.65;
    }

    .footer-column {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .footer-column strong {
      margin-bottom: 8px;
      color: #d9e8e0;
      font-size: 11px;
      font-weight: 650;
    }

    .footer-column a {
      min-height: 34px;
      display: inline-flex;
      align-items: center;
      color: #9eb3a8;
      font-size: 11px;
    }

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

    .footer {
      border-top: 1px solid rgba(255,255,255,.09);
      background: #10291f;
    }

    .footer-inner {
      min-height: 78px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .footer p,
    .footer-links {
      margin: 0;
      color: #80998c;
      font-size: 11px;
    }

    .footer-links {
      display: flex;
      gap: 16px;
    }

    .footer-links a {
      min-height: var(--control-hit-min);
      display: inline-flex;
      align-items: center;
    }

    @media (max-width: 980px) {
      .article-layout {
        grid-template-columns: minmax(0,1fr) 250px;
        gap: 34px;
      }
    }

    @media (max-width: 760px) {
      .container {
        width: min(100% - 28px, var(--content-app));
      }

      .header-inner {
        min-height: 62px;
        gap: 8px;
      }

      .nav {
        display: none;
        position: absolute;
        top: 62px;
        left: 14px;
        right: 14px;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 8px;
        border: 1px solid var(--separator);
        border-radius: var(--radius-lg);
        background: rgba(255,255,255,.98);
        box-shadow: var(--shadow-floating);
      }

      .nav.open { display: flex; }
      .nav a { min-height: 48px; }

      .header-action {
        width: var(--control-hit-min);
        padding: 0;
        margin-left: auto;
        font-size: 0;
      }

      .header-action span { font-size: 16px; }
      .menu-button { display: block; }

      .article-hero {
        padding: 36px 0 30px;
      }

      h1 {
        font-size: 38px;
      }

      .article-lead {
        font-size: 15px;
      }

      .article-section {
        padding: 34px 0 52px;
      }

      .article-layout {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .article-sidebar {
        position: static;
        grid-template-columns: 1fr 1fr;
      }

      .article-body p,
      .article-body li {
        font-size: 15px;
      }

      .article-cover {
        margin-bottom: 26px;
      }

      .article-body h2 {
        margin-top: 36px;
        font-size: 25px;
      }

      .tool-cta {
        grid-template-columns: 1fr;
      }

      .tool-cta a {
        justify-self: start;
      }

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

      .article-footer-grid {
        grid-template-columns: 1fr;
      }

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

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

      .site-map-inner {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }

      .footer-brand {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 480px) {
      .article-sidebar {
        grid-template-columns: 1fr;
      }

      .site-map-inner {
        grid-template-columns: 1fr;
      }

      .footer-brand {
        grid-column: auto;
      }

      .footer-inner {
        min-height: 108px;
        flex-direction: column;
        justify-content: center;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        scroll-behavior: auto !important;
        transition: none !important;
        animation: none !important;
      }
    }