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


body {
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    font-family: Helvetica, Arial, sans-serif;
}

.main-container {
    max-width: 1000px;
    width: 100%;
    gap: 100px;
    display: flex;
    align-items: center;
}

.logo-container {
    flex: 1;

}

.pcm-logo {
    font-size: 60px;
    font-weight: 700;
    color: #4a5568;
    letter-spacing: -0.05em;
}

.pcm-logo a {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.register-box {
    flex: 1;
}

.input-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.input-row input {
    flex: 1;
    padding: 10px;
    font-size: 16px;
}

.signup-entry {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.signup-entry input {
    padding: 14px 16px;
    font-size: 17px;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    outline: none;
    transition: border-color 0.2s;
}

.signup-entry input:focus {
    border-color: #1877f2;
    box-shadow: 0 0 0 2px #e7f3ff;
}

.error-message {
    color: red;
    text-align: center;
}

.input-error {
    border: 2px solid #dc3545 !important;
    background-color: #fff5f5;
}

.input-error:focus {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.2);
}

.register-button {
    background-color: #2563eb;
    ;
    color: #ffffff;
    font-size: 20px;
    font-weight: 700;
    padding: 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.register-button:hover {
    background-color: #1d4ed8;

}

.backToLogin {
    color: inherit;
    text-align: center;
    margin-top: 10px;
}

.backToLogin a {
    padding: 8px 0px;
    text-decoration: none;
    font-size: 14px;
    text-align: center;
    color: #2563eb;
}

.backToLogin a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .main-container {
        flex-direction: column;
        gap: 40px;
        max-width: 400px;
    }

    .logo-container {
        text-align: center;
    }

    .pcm-logo {
        font-size: 50px;
    }

}

@media (max-width: 500px) {
    .pcm-logo {
        font-size: 40px;
    }

    .signup-entry input,
    .register-button,
    .backToLogin a {
        font-size: 16px;
    }
}