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

body {
    font-family: 'Science Gothic', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 25%, #0d0d0d 50%, #1a1a1a 75%, #000000 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container {
    width: 100%;
    max-width: 450px;
}

.register-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

h1 {
    text-align: center;
    color: #ffffff;
    margin-bottom: 30px;
    font-size: 28px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #cccccc;
    font-weight: 500;
    font-size: 14px;
}

input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-size: 14px;
    background: rgba(0, 0, 0, 0.3);
    color: #ffffff;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

input.error {
    border-color: #ff4444;
}

.error-message {
    display: block;
    color: #ff6666;
    font-size: 12px;
    margin-top: 5px;
    min-height: 18px;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #ffffff;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-submit:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 255, 255, 0.1);
}

.btn-submit:active {
    transform: translateY(0);
}

.btn-submit:disabled {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.3);
    cursor: not-allowed;
    transform: none;
}

.form-footer {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.form-footer p {
    color: #cccccc;
    font-size: 14px;
}

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

.form-footer a:hover {
    text-decoration: underline;
}

.bottom-nav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 30px;
    z-index: 100;
}

.bottom-nav a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    font-weight: 300;
    transition: color 0.3s;
    position: relative;
    padding-bottom: 4px;
}

.bottom-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: #ff4444;
    transform: scaleX(0);
    transition: transform 0.3s;
}

.bottom-nav a:hover {
    color: rgba(255, 255, 255, 1);
}

.bottom-nav a:hover::after {
    transform: scaleX(1);
}

@media (max-width: 480px) {
    .register-box {
        padding: 30px 20px;
    }

    h1 {
        font-size: 24px;
    }

    .bottom-nav {
        bottom: 20px;
        gap: 20px;
    }

    .bottom-nav a {
        font-size: 12px;
    }
}