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This security screen protects every account you own and it's simpler than you think #2fa #css #html

Source Code

index.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8"/>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title>Two-Factor Auth</title>
  <link rel="stylesheet" href="styles.css"/>
  <script src="script.js"></script>
</head>
<body>
  <main class="card">
    <div class="content">
      <div class="shield">🛡️</div>
      <h2>Two-factor authentication</h2>
      <p class="subtitle">Enter the code from your authenticator app</p>
      <div class="digits">
        <input type="text" inputmode="numeric" maxlength="1"/>
        <input type="text" inputmode="numeric" maxlength="1"/>
        <input type="text" inputmode="numeric" maxlength="1"/>
        <span class="dash">-</span>
        <input type="text" inputmode="numeric" maxlength="1"/>
        <input type="text" inputmode="numeric" maxlength="1"/>
        <input type="text" inputmode="numeric" maxlength="1"/>
      </div>
      <button type="submit">Verify</button>
    </div>
  </main>
</body>
</html>

styles.css

* {
  margin: 0;
  box-sizing: border-box;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(160deg, #050608, #0a1422 60%, #0e1d33);
  font-family: system-ui, sans-serif;
}

.card {
  width: 400px;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(160deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 0 80px rgba(59,130,246,0.06), 0 30px 80px rgba(0,0,0,0.7);
}

.content {
  padding: 44px 40px;
  text-align: center;
}

.shield {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(59,130,246,0.08);
  border: 1px solid rgba(59,130,246,0.15);
  font-size: 28px;
  line-height: 64px;
  margin: 0 auto 20px;
}

h2 {
  font-size: 22px;
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  margin-bottom: 32px;
}

.digits {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
}

.digits input {
  width: 46px;
  height: 54px;
  border-radius: 4px;
  border: 1px solid rgba(59,130,246,0.2);
  background: rgba(0,0,0,0.3);
  color: #93c5fd;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}

.digits input:focus {
  outline: none;
  border-color: rgba(59,130,246,0.6);
  box-shadow: 0 0 15px rgba(59,130,246,0.2);
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #1d4ed8, #2563eb, #1d4ed8);
  background-size: 200% 200%;
  background-position: left center;
  cursor: pointer;
  transition: background-position 0.3s ease;
}

button:hover {
  background-position: right center;
}

.card::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 12px;
  width: 24px;
  height: 24px;
  border-top: 2px solid #3b82f6;
  border-left: 2px solid #3b82f6;
}

.card::after {
  content: "";
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 24px;
  height: 24px;
  border-bottom: 2px solid #3b82f6;
  border-right: 2px solid #3b82f6;
}

script.js

document.addEventListener("DOMContentLoaded", () => {
  const inputs = document.querySelectorAll(".digits input");

  inputs.forEach((input, index) => {
    input.addEventListener("input", () => {
      const value = input.value.replace(/\D/g, "");
      input.value = value.slice(0, 1);

      if (value && index < inputs.length - 1) {
        inputs[index + 1].focus();
      }
    });

    input.addEventListener("keydown", (e) => {
      if (e.key === "Backspace" && !input.value && index > 0) {
        inputs[index - 1].focus();
      }
    });
  });

  if (inputs[0]) inputs[0].focus();
});

blankify

This security screen protects every account you own and it's simpler than you think #2fa #css #html

Source Code