:root {
    --bg: #ffffff;
    --bg-soft: #faf7f3;
    --ink: #1f130b;
    --ink-soft: #6b574a;
    --ink-mute: #9a8878;
    --red: #7a1e1e;
    --red-soft: #a83232;
    --coffee: #6b3a17;
    --coffee-light: #c89978;
    --line: rgba(31, 19, 11, 0.10);
    --line-strong: rgba(31, 19, 11, 0.18);
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
  body {
    font-family: 'DM Sans', -apple-system, sans-serif;
    font-size: 17px;
    line-height: 1.7;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

  /* Header */
  header {
    border-bottom: 1px solid var(--line);
    padding: 18px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 100;
  }
  header .container { display: flex; align-items: center; justify-content: space-between; }
  .logo {
    font-family: 'Fraunces', serif;
    font-variation-settings: 'SOFT' 50, 'opsz' 144, 'wght' 500;
    font-size: 22px;
    letter-spacing: -0.02em;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .logo-img {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: block; flex-shrink: 0;
    object-fit: cover;
  }
  nav ul { display: flex; gap: 28px; list-style: none; }
  nav a { font-size: 14px; color: var(--ink); transition: color 0.2s; }
  nav a:hover { color: var(--red); }
  .mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    color: var(--ink);
  }
  .mobile-toggle svg { width: 24px; height: 24px; }

  /* Breadcrumb */
  .breadcrumb {
    padding: 24px 0 0;
    font-size: 13px;
    color: var(--ink-mute);
  }
  .breadcrumb a:hover { color: var(--red); }
  .breadcrumb .sep { margin: 0 8px; color: var(--coffee-light); }

  /* Article */
  article { padding: 32px 0 80px; }
  .article-grid {
    display: grid;
    grid-template-columns: minmax(0, 720px) 280px;
    gap: 80px;
    margin-top: 32px;
  }

  .article-header { margin-bottom: 40px; }
  .article-eyebrow {
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--red);
    font-weight: 500;
    margin-bottom: 18px;
  }
  .article-header h1 {
    font-family: 'Fraunces', serif;
    font-variation-settings: 'SOFT' 80, 'opsz' 144, 'wght' 400;
    font-size: clamp(34px, 5vw, 56px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
  }
  .article-meta {
    display: flex;
    gap: 24px;
    font-size: 13px;
    color: var(--ink-soft);
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line);
  }
  .article-meta span::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 4px;
    background: var(--coffee-light);
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
  }

  .article-image {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #6b3a17 0%, #3d1f08 100%);
    border-radius: 4px;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
  }
  .article-image::before {
    content: 'V60';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Fraunces', serif;
    font-variation-settings: 'SOFT' 100, 'opsz' 144, 'wght' 300;
    font-size: 140px;
    color: rgba(255, 255, 255, 0.15);
    font-style: italic;
  }

  .article-body p {
    margin-bottom: 22px;
    color: var(--ink);
  }
  .article-body p.lead {
    font-size: 19px;
    line-height: 1.6;
    color: var(--ink-soft);
    margin-bottom: 32px;
  }
  .article-body h2 {
    font-family: 'Fraunces', serif;
    font-variation-settings: 'SOFT' 60, 'opsz' 144, 'wght' 500;
    font-size: clamp(24px, 3vw, 32px);
    line-height: 1.2;
    letter-spacing: -0.015em;
    margin: 48px 0 18px;
    color: var(--ink);
  }
  .article-body h3 {
    font-family: 'Fraunces', serif;
    font-variation-settings: 'opsz' 144, 'wght' 500;
    font-size: 21px;
    margin: 32px 0 12px;
  }
  .article-body ul, .article-body ol {
    margin: 0 0 24px 24px;
  }
  .article-body li { margin-bottom: 8px; }
  .article-body strong { color: var(--red); font-weight: 500; }

  .callout {
    background: var(--bg-soft);
    border-left: 3px solid var(--red);
    padding: 20px 24px;
    margin: 32px 0;
    border-radius: 0 4px 4px 0;
  }
  .callout-title {
    font-family: 'Fraunces', serif;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--red);
  }
  .callout p { margin-bottom: 0; font-size: 15px; color: var(--ink-soft); }

  /* Sidebar */
  .sidebar { position: sticky; top: 100px; align-self: start; }
  .sidebar-card {
    background: var(--bg-soft);
    padding: 28px;
    border-radius: 4px;
    margin-bottom: 24px;
  }
  .sidebar-card h4 {
    font-family: 'Fraunces', serif;
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
  }
  .sidebar-card ul { list-style: none; }
  .sidebar-card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
  }
  .sidebar-card li:last-child { border-bottom: none; }
  .sidebar-card li strong {
    display: block;
    color: var(--ink-mute);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 4px;
    font-weight: 400;
  }
  .sidebar-card li span {
    color: var(--ink);
    font-size: 15px;
  }

  .related {
    background: var(--bg-soft);
    padding: 28px;
    border-radius: 4px;
  }
  .related h4 {
    font-family: 'Fraunces', serif;
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
  }
  .related a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    color: var(--ink);
    transition: color 0.2s;
  }
  .related a:hover { color: var(--red); }
  .related a:last-child { border-bottom: none; }

  /* Footer */
  footer {
    background: var(--bg);
    padding: 60px 0 30px;
    border-top: 1px solid var(--line);
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
  }
  .footer-brand .logo { margin-bottom: 16px; }
  .footer-brand p { color: var(--ink-soft); font-size: 14px; max-width: 280px; }
  .footer-col h5 {
    font-family: 'Fraunces', serif;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 16px;
  }
  .footer-col ul { list-style: none; }
  .footer-col li { margin-bottom: 10px; }
  .footer-col a {
    color: var(--ink-soft);
    font-size: 14px;
    transition: color 0.2s;
  }
  .footer-col a:hover { color: var(--red); }
  .footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    color: var(--ink-mute);
    font-size: 13px;
    flex-wrap: wrap;
    gap: 16px;
  }

  /* Mobile */
  @media (max-width: 900px) {
    .container { padding: 0 20px; }
    nav ul { display: none; }
    .mobile-toggle { display: block; }
    nav.open ul {
      display: flex;
      position: absolute;
      top: 100%;
      left: 0; right: 0;
      background: white;
      flex-direction: column;
      gap: 0;
      padding: 12px 24px 24px;
      border-bottom: 1px solid var(--line);
    }
    nav.open li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    nav.open li:last-child { border-bottom: none; }

    .article-grid {
      grid-template-columns: 1fr;
      gap: 48px;
    }
    .sidebar { position: static; }
    .article-image { aspect-ratio: 4/3; }
    .article-image::before { font-size: 90px; }

    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { flex-direction: column; text-align: center; }
  }

  @media (max-width: 540px) {
    body { font-size: 16px; }
    .article-body p.lead { font-size: 17px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-brand { grid-column: auto; }
  }

  /* Tablolar */
  .article-body .table-wrap { overflow-x: auto; margin: 28px 0; -webkit-overflow-scrolling: touch; }
  .article-body table { border-collapse: collapse; width: 100%; font-size: 15px; min-width: 480px; }
  .article-body th, .article-body td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); }
  .article-body th { font-family: 'Fraunces', serif; font-weight: 500; font-size: 14px; background: var(--bg-soft); }
  .article-body tbody tr:hover { background: var(--bg-soft); }
  .article-body td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
  .article-body caption { caption-side: bottom; font-size: 13px; color: var(--ink-mute); padding-top: 10px; text-align: left; }

  /* Icindekiler */
  .toc { background: var(--bg-soft); border-radius: 4px; padding: 22px 26px; margin: 0 0 36px; }
  .toc h2 { font-family: 'Fraunces', serif; font-size: 16px !important; margin: 0 0 12px !important; letter-spacing: 0; }
  .toc ol { margin: 0 0 0 20px; }
  .toc li { margin-bottom: 6px; font-size: 15px; }
  .toc a { color: var(--ink-soft); }
  .toc a:hover { color: var(--red); }

  /* Hub kartlari */
  .hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; margin: 32px 0; }
  .hub-card { display: block; background: var(--bg-soft); border-radius: 4px; padding: 24px; transition: transform 0.2s, box-shadow 0.2s; }
  .hub-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(31,19,11,0.08); }
  .hub-card h3 { font-family: 'Fraunces', serif; font-size: 19px; margin: 0 0 8px !important; }
  .hub-card p { font-size: 14px; color: var(--ink-soft); margin: 0 !important; }
  .hub-card .tag { display: inline-block; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--red); margin-bottom: 10px; }

  /* Hesaplayici */
  .calc { background: var(--bg-soft); border-radius: 4px; padding: 28px; margin: 32px 0; }
  .calc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
  .calc label { display: block; font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 6px; }
  .calc select, .calc input { width: 100%; padding: 11px 12px; border: 1px solid var(--line-strong); border-radius: 3px; background: #fff; font-family: inherit; font-size: 16px; color: var(--ink); }
  .calc-out { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--line); }
  .calc-out div { text-align: center; }
  .calc-out strong { display: block; font-family: 'Fraunces', serif; font-size: 28px; font-weight: 500; color: var(--red); font-variant-numeric: tabular-nums; }
  .calc-out span { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); }
  @media (max-width: 540px) { .calc-row { grid-template-columns: 1fr; } }

  /* Yontem testi */
  .q-opt { display: block; width: 100%; text-align: left; background: #fff;
    border: 1px solid var(--line-strong); border-radius: 3px; padding: 13px 16px;
    margin-bottom: 10px; font-family: inherit; font-size: 16px; color: var(--ink); cursor: pointer; }
  .q-opt:hover { border-color: var(--red); color: var(--red); }
  .q-step { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 8px; }
  .q-q { font-family: 'Fraunces', serif; font-size: 20px; margin-bottom: 16px; }
  .q-again { background: none; border: none; color: var(--red); font-family: inherit; font-size: 14px; cursor: pointer; padding: 0; text-decoration: underline; }
  .q-link { color: var(--red); font-size: 16px; }
  /* Kafein hesaplayici */
  .k-row { display: grid; grid-template-columns: 1fr 92px; gap: 12px; align-items: center;
    padding: 9px 0; border-bottom: 1px solid var(--line); }
  .k-row:last-of-type { border-bottom: none; }
  .k-row span { font-size: 15px; }
  .k-row small { display: block; color: var(--ink-mute); font-size: 12px; }
  .k-row input { width: 100%; padding: 8px 10px; border: 1px solid var(--line-strong);
    border-radius: 3px; font-family: inherit; font-size: 15px; background: #fff; color: var(--ink); }
  /* Hub kartlarinda h2 de ayni gorunsun */
  .hub-card h2 { font-family: 'Fraunces', serif; font-size: 19px; font-weight: 500; margin: 0 0 8px !important;
    line-height: 1.25; letter-spacing: 0; }

  /* 'header' etiketi article basligina da uygulaniyor: sifirla */


  /* Baslik hiyerarsisi: gorsel ayni, etiket dogru */
  .sidebar-card h2, .related h2 { font-family: 'Fraunces', serif; font-size: 18px; font-weight: 500;
    margin: 0 0 16px; line-height: 1.3; letter-spacing: 0; }
  .footer-col h2 { font-family: 'Fraunces', serif; font-size: 14px; font-weight: 500;
    margin: 0 0 16px; line-height: 1.3; letter-spacing: 0; }
  /* Yazar kutusu */
  .author-box { display: flex; gap: 18px; align-items: flex-start; background: var(--bg-soft);
    border-radius: 4px; padding: 22px 24px; margin: 48px 0 0; }
  .author-avatar { flex-shrink: 0; width: 52px; height: 52px; border-radius: 50%;
    background: var(--coffee); color: rgba(255,255,255,0.85); display: flex;
    align-items: center; justify-content: center; }
  .author-avatar svg { width: 30px; height: 30px; }
  .author-name { font-family: 'Fraunces', serif; font-weight: 500; font-size: 17px; margin-bottom: 4px; }
  .author-box p { font-size: 14px; color: var(--ink-soft); margin: 0 !important; line-height: 1.6; }
  .author-box a { color: var(--red); white-space: nowrap; }
  @media (max-width: 540px) { .author-box { flex-direction: column; gap: 14px; } }
  .article-header { position: static; border-bottom: none; padding: 0; background: none; backdrop-filter: none; z-index: auto; }
  .article-image { display: flex; align-items: center; justify-content: center; }
  .article-image::before { content: none !important; }
  .hero-word {
    font-family: 'Fraunces', serif;
    font-variation-settings: 'SOFT' 100, 'opsz' 144, 'wght' 300;
    font-size: clamp(52px, 11vw, 120px);
    color: rgba(255, 255, 255, 0.15);
    font-style: italic;
    text-align: center;
    line-height: 1;
    padding: 0 20px;
  }
  .article-body h3 { font-family: 'Fraunces', serif; font-weight: 500; font-size: 19px; margin: 28px 0 10px; }
  .article-art { color: rgba(255, 255, 255, 0.72); padding: 24px; }
  .article-art .hero-art { width: 100%; max-width: 520px; height: 100%; max-height: 100%; display: block; }