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

body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    background: #f5f6f8;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px 15px;
}

.signup-container {
    width: 100%;
    display: flex;
    justify-content: center;
}

.signup-card {
    width: 100%;
    max-width: 450px;
    background: #ffffff;
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.brand {
    text-align: center;
    margin-bottom: 28px;
}

.brand h1 {
    font-size: 32px;
    margin-bottom: 8px;
    color: #111827;
}

.brand p {
    color: #6b7280;
    font-size: 15px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-size: 14px;
    font-weight: 600;
    color: #374151;
}

.form-group input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: 0.2s;
}

.form-group input:focus {
    border-color: #111827;
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

#signupBtn {
    width: 100%;
    height: 48px;
    border: none;
    border-radius: 8px;
    background: #111827;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: 0.2s;
}

#signupBtn:hover {
    background: #000000;
}

#signupBtn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#signupMessage {
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
    min-height: 20px;
}

.login-link {
    text-align: center;
    margin-top: 22px;
    font-size: 14px;
    color: #6b7280;
}

.login-link a {
    color: #111827;
    font-weight: 600;
    text-decoration: none;
}

.login-link a:hover {
    text-decoration: underline;
}

@media (max-width: 500px) {

    body {
        padding: 20px 12px;
    }

    .signup-card {
        padding: 25px 20px;
    }

    .brand h1 {
        font-size: 28px;
    }
}