:root {
    --primary-black: #000000;
    --primary-yellow: #f1fc25;
    --hover-yellow: #d5f91f;
}

body {
    font-family: 'Poppins', sans-serif;
    background: #f0f2f5;
    min-height: 100vh;
    margin: 0;
    padding: 2rem 0;
}

.container { max-width: 1200px; }

.registration-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    margin: 2rem auto;
}

.left-panel {
    background: var(--primary-black);
    padding: 3rem;
    position: relative;
    height: 100%;
    min-height: 560px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: white;
}

.left-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(241, 252, 37, 0.2));
    z-index: 1;
}

.left-content { position: relative; z-index: 2; }

.left-panel h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--primary-yellow);
}

.left-panel p { font-size: 1.1rem; opacity: 0.9; }

.form-section { padding: 3rem; background: white; }

.logo { margin-bottom: 2rem; text-align: center; }
.logo img { width: 100px; height: auto; }

.form-group { margin-bottom: 1.5rem; }
.form-label { font-weight: 500; color: var(--primary-black); margin-bottom: 0.5rem; }

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 0.8rem;
    height: auto;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-yellow);
    box-shadow: 0 0 0 0.2rem rgba(241, 252, 37, 0.25);
}

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-black);
    border: none;
    color: var(--primary-yellow);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--hover-yellow);
    color: var(--primary-black);
    transform: translateY(-2px);
}

.footer-link { text-align: center; margin-top: 1.5rem; }

.custom-link {
    color: var(--primary-black);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.custom-link:hover { color: #7d8500; text-decoration: none; }

/* Neón con letras negras sobre fondo blanco */
.neon-link {
    font-weight: 700;
    display: inline-block;
    text-decoration: none;
    color: #000;
    text-shadow: 0 0 5px #f1fc25, 0 0 10px #f1fc25, 0 0 20px #f1fc25, 0 0 30px #f1fc25;
    animation: neonFlicker 1.5s infinite alternate;
    transition: transform 0.3s ease;
}

.neon-link:hover { transform: translateY(-2px); color: #000; text-decoration: none; }

@keyframes neonFlicker {
    0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
        text-shadow: 0 0 5px #f1fc25, 0 0 10px #f1fc25, 0 0 20px #f1fc25, 0 0 30px #f1fc25;
    }
    20%, 24%, 55% {
        text-shadow: 0 0 2px #f1fc25;
    }
}

@media (prefers-reduced-motion: reduce) {
    .neon-link { animation: none; }
}

@media (max-width: 991.98px) {
    .left-panel { min-height: 280px; }
    .form-section { padding: 2rem 1.5rem; }
}