* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #1a1a2e;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    background: #ffffff;
    padding: 30px 40px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
}

h2 {
    text-align: center;
    color: #1a1a2e;
    margin-bottom: 25px;
    font-size: 24px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    color: #333;
    margin-bottom: 5px;
    font-size: 14px;
}

.input-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    outline: none;
}

.input-group input:focus {
    border-color: #16213e;
    box-shadow: 0 0 5px rgba(22, 33, 62, 0.2);
}

.code-group {
    display: flex;
    gap: 10px;
}

.code-group input {
    flex: 1;
}

.send-btn {
    width: 120px;
    padding: 10px;
    border: none;
    border-radius: 4px;
    background-color: #16213e;
    color: white;
    cursor: pointer;
    font-size: 14px;
}

.send-btn:disabled {
    background-color: #999;
    cursor: not-allowed;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 4px;
    background-color: #0f3460;
    color: white;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}

.submit-btn:hover {
    background-color: #1a1a2e;
}

.switch-tip {
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
    color: #666;
}

.switch-tip a {
    color: #0f3460;
    text-decoration: none;
}

.switch-tip a:hover {
    text-decoration: underline;
}