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

    :root {
      --bg:          #050914;
      --surface:     #0c1220;
      --card:        #111827;
      --border:      rgba(255,255,255,0.07);
      --accent:      #3b82f6;
      --accent-glow: #60a5fa;
      --accent-soft: rgba(59,130,246,0.12);
      --text:        #f1f5f9;
      --text-muted:  #64748b;
      --text-dim:    #94a3b8;
      --radius:      14px;
      --font:        'Inter', system-ui, sans-serif;
    }

    html { scroll-behavior: smooth; }
    body {
      background: var(--bg);
      color: var(--text);
      font-family: var(--font);
      font-size: 16px;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      min-height: 100vh;
    }

    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 9999;
    }

    h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.1; }
    h2 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; }
    p  { color: var(--text-dim); line-height: 1.8; }
    a  { color: inherit; text-decoration: none; }

    .container { max-width: 760px; margin: 0 auto; padding: 0 24px; }

    /* NAV */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      background: rgba(5,9,20,0.8);
      border-bottom: 1px solid var(--border);
    }
    /* Nav left: "Back to Timeline" button */
    .nav-timeline-btn {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 8px 16px;
      border-radius: 8px;
      border: 1px solid var(--border);
      background: transparent;
      transition: all 0.2s;
      cursor: pointer;
      font-family: var(--font);
      text-decoration: none;
    }
    .nav-timeline-btn:hover {
      color: var(--accent-glow);
      border-color: rgba(96,165,250,0.3);
      background: var(--accent-soft);
    }
    /* Nav right: "Juan Bautista Alonso Lareo" home link */
    .nav-home-link {
      font-size: 0.88rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text);
      transition: color 0.2s;
    }
    .nav-home-link:hover { color: var(--accent-glow); }

    /* Main layout */
    main {
      padding: 120px 0 80px;
    }

    /* Breadcrumb */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-bottom: 32px;
    }
    .breadcrumb a { color: var(--accent-glow); transition: opacity 0.2s; }
    .breadcrumb a:hover { opacity: 0.75; }
    .breadcrumb-sep { opacity: 0.4; }

    /* Year badge */
    .detail-year {
      display: inline-block;
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--accent-glow);
      background: var(--accent-soft);
      border: 1px solid rgba(96,165,250,0.2);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 20px;
    }

    /* Content card */
    .detail-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 48px;
      margin-bottom: 32px;
      position: relative;
      overflow: hidden;
    }
    .detail-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--accent), transparent);
    }
    @media (max-width: 600px) {
      .detail-card { padding: 28px 24px; }
    }

    .detail-card h1 { margin-bottom: 24px; }

    .detail-body {
      font-size: 1rem;
      color: var(--text-dim);
      line-height: 1.85;
    }
    .detail-body p + p { margin-top: 16px; }
    .detail-body strong { color: var(--text); }
    .detail-body .highlight {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--accent-glow);
      border: 1px solid rgba(96,165,250,0.2);
      border-radius: 6px;
      padding: 2px 8px;
      font-weight: 600;
      font-size: 0.9em;
    }

    /* Stats row */
    .stats-row {
      display: flex;
      gap: 20px;
      margin: 32px 0;
      flex-wrap: wrap;
    }
    .stat-box {
      flex: 1;
      min-width: 140px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 20px 24px;
      text-align: center;
    }
    .stat-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent-glow);
      letter-spacing: -0.04em;
      line-height: 1;
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.78rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Key points list */
    .key-points {
      list-style: none;
      margin: 24px 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .key-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
      color: var(--text-dim);
      line-height: 1.6;
    }
    .key-points li::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      flex-shrink: 0;
      margin-top: 8px;
    }

    /* Navigation between milestones */
    .nav-milestones {
      display: flex;
      gap: 12px;
      margin-top: 32px;
    }
    .nav-milestone-btn {
      flex: 1;
      padding: 16px 20px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      cursor: pointer;
      font-family: var(--font);
      transition: all 0.2s;
      text-align: left;
      color: var(--text-muted);
      font-size: 0.8rem;
    }
    .nav-milestone-btn:hover {
      border-color: rgba(255,255,255,0.15);
      color: var(--text);
      transform: translateY(-2px);
    }
    .nav-milestone-btn strong {
      display: block;
      color: var(--text);
      font-size: 0.85rem;
      margin-bottom: 3px;
    }
    .nav-milestone-btn.disabled { opacity: 0.3; pointer-events: none; }

    /* Not found */
    .not-found {
      text-align: center;
      padding: 80px 24px;
    }
    .not-found h1 { font-size: 2rem; margin-bottom: 12px; }
    .not-found p  { margin-bottom: 28px; }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 26px;
      border-radius: 10px;
      font-size: 0.9rem;
      font-weight: 600;
      background: var(--accent);
      color: #fff;
      border: none;
      cursor: pointer;
      font-family: var(--font);
      transition: all 0.2s;
    }
    .btn-primary:hover {
      background: var(--accent-glow);
      box-shadow: 0 0 30px rgba(59,130,246,0.35);
      transform: translateY(-1px);
    }

    footer {
      border-top: 1px solid var(--border);
      padding: 32px 24px;
      text-align: center;
      color: var(--text-muted);
      font-size: 0.8rem;
    }
    footer span { color: var(--accent-glow); }
  
    /* ── Zoppa Deep Dives Grid ─────────────────────────────────── */
    .zoppa-section-label {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin: 40px 0 16px;
    }
    .zoppa-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
      margin-bottom: 32px;
    }
    .zoppa-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px 20px;
      cursor: pointer;
      transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
      text-decoration: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
      overflow: hidden;
    }
    .zoppa-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(59,130,246,0.06) 0%, transparent 100%);
      opacity: 0;
      transition: opacity 0.2s;
    }
    .zoppa-card:hover::before { opacity: 1; }
    .zoppa-card:hover {
      border-color: rgba(96,165,250,0.3);
      transform: translateY(-3px);
      box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    }
    .zoppa-card-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text);
      letter-spacing: -0.01em;
      line-height: 1.3;
    }
    .zoppa-card-arrow {
      font-size: 0.8rem;
      color: var(--accent-glow);
      margin-top: auto;
      transition: transform 0.2s;
    }
    .zoppa-card:hover .zoppa-card-arrow { transform: translateX(4px); }
    @media (max-width: 600px) {
      .zoppa-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 400px) {
      .zoppa-grid { grid-template-columns: 1fr; }
    }