* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(45deg, #0a192f, #172a46);
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 400px;
}

.signup-form {
    background: #172a46;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    border: 1px solid #304a6e;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.signup-form:hover {
    transform: translateY(-5px);
}

h2 {
    color: #ccd6f6;
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 600;
}

.form-group {
    position: relative;
    margin-bottom: 30px;
}

.form-group input {
    width: 100%;
    padding: 10px 0;
    font-size: 16px;
    color: #ccd6f6;
    background: transparent;
    border: none;
    border-bottom: 2px solid #304a6e;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group label {
    position: absolute;
    top: 10px;
    left: 0;
    font-size: 16px;
    color: #8892b0;
    pointer-events: none;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group input:valid {
    border-bottom-color: #64ffda;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label {
    top: -20px;
    font-size: 12px;
    color: #64ffda;
}

.signup-button {
    width: 100%;
    padding: 12px;
    background: #64ffda;
    color: #0a192f;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
}

.signup-button:hover {
    background: #52d3b4;
    transform: translateY(-2px);
}

.signup-button:active {
    transform: translateY(0);
}

.login-link {
    text-align: center;
    margin-top: 20px;
    color: #8892b0;
}

.login-link a {
    color: #64ffda;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.login-link a:hover {
    color: #52d3b4;
    text-decoration: underline;
}