HTML Online Viewer

HTML source45 lines · 1263 chars

<!doctype html>
<html lang="vi">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>HTML Online</title>
    <style>
      * { box-sizing: border-box; }
      body {
        min-height: 100vh;
        margin: 0;
        display: grid;
        place-items: center;
        color: #17324d;
        font-family: system-ui, sans-serif;
        background: linear-gradient(135deg, #e0f2fe, #f5f3ff);
      }
      .card {
        width: min(520px, 90vw);
        padding: 32px;
        border: 1px solid rgba(255, 255, 255, .8);
        border-radius: 24px;
        background: rgba(255, 255, 255, .72);
        box-shadow: 0 24px 60px rgba(8, 126, 193, .18);
        text-align: center;
      }
      h1 { margin-top: 0; color: #087ec1; }
      button {
        padding: 10px 18px;
        border: 0;
        border-radius: 999px;
        background: #087ec1;
        color: white;
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <main class="card">
      <h1>HTML Online Viewer</h1>
      <p>Chỉnh sửa mã nguồn bên trái để xem kết quả ngay lập tức.</p>
      <button onclick="this.textContent = 'Đã chạy JavaScript!'">Thử JavaScript</button>
    </main>
  </body>
</html>

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