:root {
    --primary: #00eaff;
    --secondary: #0066ff;
    --glass: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.15);
}

* {
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    margin: 0;
    background: radial-gradient(circle at top right, #0f0c29, #302b63, #24243e);
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
}

body::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: -1;
}

.signup-card {
    background: var(--glass);
    backdrop-filter: blur(25px) saturate(180%);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 45px 35px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.signup-card h2 {
    margin: 0 0 10px;
    font-size: 1.9rem;
    letter-spacing: -1px;
}

.signup-card p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 22px;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: var(--primary);
}

.input-group input {
    width: 100%;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 18px;
    color: #fff;
    font-size: 1rem;
    transition: 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.45);
    box-shadow: 0 0 0 4px rgba(0, 234, 255, 0.15);
}

.signup-btn {
    width: 100%;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 12px;
    padding: 15px;
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.signup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(0, 234, 255, 0.5);
}

.footer-text {
    margin-top: 20px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-text a {
    color: #00eaff;
    text-decoration: none;
    font-weight: 600;
}