Database Administrator

<div class="infographic-dba" id="dbaWrap">
  <style>
    .infographic-dba {
      --ink:        #1a1a1a;
      --ink-soft:   #5c5c5c;
      --paper:      #ffffff;
      --paper-alt:  #f6f3ee;
      --accent:     #2563eb;
      --accent-soft:#e3ebfd;
      --line:       #ddd6c9;

      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      padding: 2.5rem 1.5rem;
      border-radius: 14px;
      box-sizing: border-box;
      max-width: 920px;
      margin: 0 auto;
    }
    .infographic-dba[data-theme="dark"] {
      --ink:        #e8e6e1;
      --ink-soft:   #9a968c;
      --paper:      #121212;
      --paper-alt:  #1e1e26;
      --accent:     #5b8def;
      --accent-soft:#202942;
      --line:       #2c313d;
    }
    .infographic-dba * { box-sizing: border-box; }

    .dba-eyebrow {
      font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
      color: var(--accent); font-weight: 700; margin: 0 0 0.4rem;
    }
    .dba-title { font-size: 1.55rem; font-weight: 700; margin: 0 0 0.4rem; letter-spacing: -0.01em; }
    .dba-sub { font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 1.75rem; max-width: 55ch; }

    /* --- Hub: grid + detail panel (desktop) --- */
    .dba-hub { display: grid; grid-template-columns: 1.1fr 1fr; gap: 1.5rem; align-items: start; }
    .dba-grid {
      display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.6rem; align-content: start;
    }
    .dba-cell { display: flex; flex-direction: column; }
    .dba-item {
      display: flex; align-items: center; gap: 0.65rem;
      background: var(--paper-alt); border: 1px solid var(--line); border-radius: 9px;
      padding: 0.6rem 0.7rem; font: inherit; color: var(--ink); text-align: left;
      cursor: pointer; transition: border-color .15s, background .15s;
      width: 100%;
    }
    .dba-item:hover { border-color: var(--accent); }
    .dba-item.is-active { background: var(--accent-soft); border-color: var(--accent); }
    .dba-badge {
      flex: 0 0 auto; width: 26px; height: 26px; border-radius: 50%;
      background: var(--paper); border: 1.5px solid var(--line);
      display: flex; align-items: center; justify-content: center;
      font-size: 0.72rem; font-weight: 700; color: var(--ink-soft);
    }
    .dba-item.is-active .dba-badge { border-color: var(--accent); color: var(--accent); }
    .dba-item-label { font-size: 0.82rem; font-weight: 600; line-height: 1.25; }

    .dba-panel {
      background: var(--paper-alt); border: 1px solid var(--line); border-radius: 12px;
      padding: 1.4rem 1.5rem; min-height: 220px;
    }
    .dba-panel > *:last-child { margin-bottom: 0; }
    .dba-panel-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 0.9rem; color: var(--accent); }
    .dba-panel-list { margin: 0; padding-left: 1.1rem; font-size: 0.9rem; line-height: 1.55; }
    .dba-panel-list li { margin-bottom: 0.4rem; }
    .dba-panel-list li:last-child { margin-bottom: 0; }

    /* --- Inline accordion detail (mobile only, hidden on desktop) --- */
    .dba-detail {
      display: none;
      overflow: hidden;
      max-height: 0;
      opacity: 0;
    }
    .dba-detail-inner {
      background: var(--accent-soft); border: 1px solid var(--line); border-top: none;
      border-radius: 0 0 9px 9px; padding: 0.7rem 0.8rem; margin-top: -1px;
    }
    .dba-detail-list { margin: 0; padding-left: 1.1rem; font-size: 0.8rem; line-height: 1.45; }
    .dba-detail-list li { margin-bottom: 0.3rem; }
    .dba-detail-list li:last-child { margin-bottom: 0; }

    @media (max-width: 700px) {
      .dba-hub { grid-template-columns: 1fr; gap: 0; }
      .dba-grid { grid-template-columns: 1fr; gap: 0.5rem; }
      .dba-panel { display: none; }
      .dba-cell.is-active .dba-item { border-radius: 9px 9px 0 0; }
      .dba-detail {
        display: block;
        transition: max-height .35s ease, opacity .3s ease;
      }
      .dba-cell.is-active .dba-detail {
        max-height: 260px;
        opacity: 1;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .infographic-dba *, .infographic-dba *::before, .infographic-dba *::after {
        animation-duration: 0.001ms !important; transition-duration: 0.001ms !important;
      }
    }
  </style>

  <p class="dba-eyebrow">Behind the Scenes</p>
  <h2 class="dba-title">Roles &amp; Responsibilities of a DBA</h2>
  <p class="dba-sub">Nine things a database administrator handles daily — click one to see what's involved.</p>

  <div class="dba-hub">
    <div class="dba-grid" id="dbaGrid"></div>
    <div class="dba-panel" id="dbaPanel"></div>
  </div>
</div>

<script>
(function () {
  var wrapper = document.getElementById('dbaWrap');

  // Dark mode detection — body attribute wins, then cookie, then light default
  var bodyAttr = document.body.getAttribute('data-darkmode');
  var dark;
  if (bodyAttr === 'true') {
    dark = true;
  } else if (bodyAttr === 'false') {
    dark = false;
  } else {
    var match = document.cookie.match(/(?:^|;\s*)darkMode=([^;]+)/);
    dark = match ? match[1] === 'true' : false;
  }
  if (dark) wrapper.setAttribute('data-theme', 'dark');

  var duties = [
    { title: 'Installation &amp; Configuration', points: [
      'Setting up new database systems — Oracle, MySQL, SQL Server, PostgreSQL.',
      'Configuring the database software and underlying hardware.'
    ]},
    { title: 'Database Maintenance', points: [
      'Performing regular tasks such as backups, updates, and patches.'
    ]},
    { title: 'Performance Tuning', points: [
      'Optimizing performance by analyzing queries and indexing.',
      'Monitoring system resources and tuning configurations.'
    ]},
    { title: 'Backup &amp; Recovery', points: [
      'Creating and managing backup strategies.',
      'Restoring data after failures or accidental loss.'
    ]},
    { title: 'Security Management', points: [
      'Setting up user roles and permissions.',
      'Ensuring only authorized users can access sensitive data.'
    ]},
    { title: 'Data Integrity &amp; Consistency', points: [
      'Enforcing rules and constraints to keep data accurate.'
    ]},
    { title: 'Monitoring &amp; Troubleshooting', points: [
      'Detecting and resolving database errors or slowdowns.'
    ]},
    { title: 'Capacity Planning', points: [
      'Forecasting future database growth and planning for scalability.'
    ]},
    { title: 'Documentation', points: [
      'Maintaining up-to-date documentation on configurations and procedures.'
    ]}
  ];

  var grid = document.getElementById('dbaGrid');
  var panel = document.getElementById('dbaPanel');

  function listHtml(points, cls) {
    var html = '<ul class="' + cls + '">';
    points.forEach(function (p) { html += '<li>' + p + '</li>'; });
    html += '</ul>';
    return html;
  }

  function renderPanel(i) {
    var d = duties[i];
    panel.innerHTML = '<h3 class="dba-panel-title">' + d.title + '</h3>' + listHtml(d.points, 'dba-panel-list');
  }

  var cells = [];

  duties.forEach(function (d, i) {
    var cell = document.createElement('div');
    cell.className = 'dba-cell' + (i === 0 ? ' is-active' : '');

    var btn = document.createElement('button');
    btn.type = 'button';
    btn.className = 'dba-item' + (i === 0 ? ' is-active' : '');
    btn.innerHTML = '<span class="dba-badge">' + (i + 1) + '</span><span class="dba-item-label">' + d.title + '</span>';

    var detail = document.createElement('div');
    detail.className = 'dba-detail';
    detail.innerHTML = '<div class="dba-detail-inner">' + listHtml(d.points, 'dba-detail-list') + '</div>';

    btn.addEventListener('click', function () {
      cells.forEach(function (c) {
        c.classList.remove('is-active');
        c.querySelector('.dba-item').classList.remove('is-active');
      });
      cell.classList.add('is-active');
      btn.classList.add('is-active');
      renderPanel(i);
    });

    cell.appendChild(btn);
    cell.appendChild(detail);
    grid.appendChild(cell);
    cells.push(cell);
  });
  renderPanel(0);
})();
</script>

.demo {
  font-family: system-ui, sans-serif;
  padding: 16px;
}

.demo h1 {
  color: #2563eb;
  margin: 0 0 8px;
}

.demo p {
  color: #4b5563;
  margin: 0;
}

document.querySelector('.demo h1')?.addEventListener('click', () => {
  alert('Hello from live preview!');
});