/**
 * Register Page Styles - Cyberpunk Neon Gaming Theme
 * Copyright (c) 2025 HUST University
 * @author NGUYỄN ĐỨC BÌNH
 * 
 * 🎮 Neon Gaming Registration
 */

/* ========================================
   Register Section
   ======================================== */
.register-section {
    padding: 60px 0;
    background: transparent;
}

.register-container {
    max-width: 520px;
    margin: 0 auto;
    background: var(--bg-gradient-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    border: 2px solid rgba(139, 92, 246, 0.3);
    box-shadow:
        0 0 0 1px rgba(139, 92, 246, 0.2),
        0 0 50px rgba(139, 92, 246, 0.2),
        0 30px 60px rgba(0, 0, 0, 0.5);
    padding: 45px;
    position: relative;
    overflow: hidden;
}

/* Neon Top Line */
.register-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-blue), var(--neon-pink));
    box-shadow: 0 0 20px var(--neon-purple);
}

.register-header {
    text-align: center;
    margin-bottom: 35px;
}

.register-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    margin-bottom: 10px;
    position: relative;
    padding-bottom: 20px;
    letter-spacing: 2px;
}

.register-title::after {
    content: '';
    display: block;
    width: 100px;
    height: 3px;
    margin: 20px auto 0;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-blue));
    box-shadow: 0 0 15px var(--neon-purple);
    border-radius: 2px;
}

.register-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

.register-form {
    margin-top: 25px;
}

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

.form-label {
    display: block;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

.form-input {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius-md);
    font-size: 1.5rem;
    transition: all 0.3s;
    background: var(--bg-card);
    color: var(--text-main);
}

.form-input:focus {
    border-color: var(--neon-purple);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2), var(--glow-purple);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-error {
    color: var(--neon-pink);
    font-size: 1.3rem;
    margin-top: 8px;
    display: block;
    background: rgba(236, 72, 153, 0.1);
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--neon-pink);
}

/* ========================================
   Register Button - Neon Style
   ======================================== */
.register-btn {
    width: 100%;
    background: linear-gradient(90deg, var(--neon-purple), var(--neon-blue));
    color: white;
    border: none;
    border-radius: var(--border-radius-pill);
    padding: 16px;
    font-size: 1.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 15px;
    box-shadow:
        0 0 15px rgba(139, 92, 246, 0.5),
        0 0 30px rgba(34, 211, 238, 0.3);
}

.register-btn:hover {
    transform: translateY(-3px);
    box-shadow:
        0 0 25px rgba(139, 92, 246, 0.8),
        0 0 50px rgba(34, 211, 238, 0.5);
}

.register-btn--google {
    background: linear-gradient(135deg, #DB4437, #C33025);
    color: white;
    margin-top: 12px;
    box-shadow: 0 0 15px rgba(219, 68, 55, 0.4);
}

.register-btn--google:hover {
    box-shadow: 0 0 25px rgba(219, 68, 55, 0.6);
    transform: translateY(-3px);
}

/* ========================================
   Login Link
   ======================================== */
.login-link {
    text-align: center;
    margin-top: 30px;
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.login-link a {
    color: var(--neon-blue);
    font-weight: 600;
    transition: all 0.2s;
    text-decoration: none;
}

.login-link a:hover {
    text-shadow: 0 0 10px var(--neon-blue);
}

/* ========================================
   Responsive styles
   ======================================== */
@media (max-width: 768px) {
    .register-container {
        max-width: 90%;
        padding: 35px 25px;
    }

    .register-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 480px) {
    .register-section {
        padding: 40px 0;
    }

    .register-container {
        padding: 30px 20px;
    }

    .register-title {
        font-size: 2.2rem;
    }

    .form-input {
        padding: 12px 15px;
    }

    .register-btn {
        padding: 14px;
    }
}