/* ==========================================================================
   CSS Variables (Custom Properties)
   ========================================================================== */
:root {
    /* Colors */
    --primary-color: #1a1a1a;
    --secondary-color: #2c3e50;
    --accent-color: #bc3ce7;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --error-color: #e74c3c;
    --info-color: #bc3ce7;
    
    /* Gradients */
    --primary-gradient: linear-gradient(135deg, #4c1186 0%, #a24b91 100%);
    --hero-gradient: linear-gradient(135deg, rgba(26, 26, 26, 0.8) 0%, rgba(26, 26, 26, 0.8) 50%);
    --card-gradient: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1010;
    --z-fixed: 1020;
    --z-modal: 1030;
    --z-popover: 1040;
    --z-tooltip: 1050;
}

/* ==========================================================================
   Reset and Base Styles
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul {
    list-style: none;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Estilos para el header oficial
   ========================================================================== */
.official-header {
    background: var(--primary-gradient);
    padding: 8px 0;
    border-bottom: 3px solid var(--accent-color);
    position: relative;
    overflow: hidden;
}

.official-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.official-header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.official-header img {
    height: 50px;
    width: auto;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    transition: transform 0.3s ease;
}

.official-header img:hover {
    transform: scale(1.05);
}

/* Responsive design para móviles */
@media (max-width: 768px) {
    .official-header {
        padding: 6px 0;
    }
    .official-header-content {
        padding: 0 15px;
    }
    .official-header img {
        height: 40px;
        max-width: 95%;
    }
}

@media (max-width: 480px) {
    .official-header {
        padding: 4px 0;
    }
    .official-header img {
        height: 35px;
        max-width: 100%;
    }
}

/* Ajuste para que el header existente no se superponga */
.header {
    position: relative;
    z-index: 10;
}

/* Efectos adicionales para el header oficial */
.official-header-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-gradient);
    background-size: 200% 100%;
    animation: gradientMove 4s ease-in-out infinite;
}

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

/* ==========================================================================
   Parallax Background
   ========================================================================== */
.parallax {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-image: url('../assets/icons/websiteIcon.png');
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    opacity: 0.1;
    z-index: -1;
    will-change: transform;
}

.content-wrapper {
    position: relative;
    z-index: 1;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    min-height: 100vh;
}

/* ==========================================================================
   Header
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(26, 26, 26, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: white;
    font-weight: var(--font-weight-bold);
    font-size: 1.5rem;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.navbar {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.8);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: white;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 30px;
    height: 30px;
    justify-content: center;
    align-items: center;
}

.hamburger {
    width: 20px;
    height: 2px;
    background: white;
    transition: all var(--transition-normal);
}

.mobile-menu-btn.active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active .hamburger:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ==========================================================================
   Main Content
   ========================================================================== */
main {
    padding-top: 120px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.registro-container {
    max-width: 900px;
    width: 100%;
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-xxl);
    background: linear-gradient(145deg, #ffffff 0%, #fdfdfd 100%);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(188, 60, 231, 0.1);
}

.registro-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid #f1f3f4;
}

.page-title {
    font-family: var(--font-secondary);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* ==========================================================================
   Form Sections
   ========================================================================== */
.form-section {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(145deg, #fafbfc 0%, #f8f9fa 100%);
    border-radius: var(--radius-lg);
    border: 1px solid #e9ecef;
    position: relative;
}

.form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.4rem;
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid #e9ecef;
}

.section-title i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.form-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-label {
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-label i {
    color: var(--accent-color);
    font-size: 0.9rem;
    width: 16px;
}

.required::after {
    content: ' *';
    color: var(--error-color);
}

.form-input,
.form-select,
.form-textarea {
    padding: var(--spacing-md);
    border: 2px solid #d1d5db;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    background: white;
    transition: all var(--transition-normal);
    position: relative;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(188, 60, 231, 0.1), 0 1px 3px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: #a1a1aa;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-file {
    position: relative;
    overflow: hidden;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border: 2px dashed #a1a1aa;
    border-radius: var(--radius-md);
    background: linear-gradient(145deg, #f9fafb 0%, #f3f4f6 100%);
    color: #4b5563;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.file-button:hover {
    border-color: var(--accent-color);
    background: rgba(188, 60, 231, 0.05);
    color: var(--accent-color);
}

.file-info {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: #6b7280;
}

.form-help {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: #6b7280;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-help i {
    color: var(--info-color);
}

/* ==========================================================================
   Submit Button
   ========================================================================== */
.submit-section {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: linear-gradient(145deg, #fafbfc 0%, #f8f9fa 100%);
    border-radius: var(--radius-lg);
    border-top: 2px solid #e9ecef;
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-submit:hover::before {
    left: 100%;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

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

/* ==========================================================================
   Footer (Idéntico al de index.html)
   ========================================================================== */
.footer {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.footer-logo h3 {
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.contact-info i {
    width: 20px;
    color: var(--info-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 1.3rem;
    color: white;
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background: var(--info-color);
    transform: translateY(-2px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-normal);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-list {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(26, 26, 26, 0.98);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: var(--z-dropdown);
        backdrop-filter: blur(10px);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-list.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-md);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .registro-container {
        margin: var(--spacing-lg);
        padding: var(--spacing-lg);
    }

    .page-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    main {
        padding-top: 80px;
    }

    .registro-container {
        margin: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ==========================================================================
   Success/Error States
   ========================================================================== */
.form-group.success .form-input,
.form-group.success .form-select {
    border-color: var(--success-color);
    background-color: rgba(39, 174, 96, 0.05);
}

.form-group.error .form-input,
.form-group.error .form-select {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.05);
}

.error-message {
    margin-top: var(--spacing-xs);
    color: var(--error-color);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ==========================================================================
   Loading States
   ========================================================================== */
.btn-submit.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-submit.loading .btn-text {
    opacity: 0;
}

.btn-submit.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   Animations
   ========================================================================== */
.registro-container {
    animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-section {
    animation: fadeIn 0.8s ease-out;
    animation-fill-mode: both;
}

.form-section:nth-child(2) { animation-delay: 0.1s; }
.form-section:nth-child(3) { animation-delay: 0.2s; }
.form-section:nth-child(4) { animation-delay: 0.3s; }

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

/* ==========================================================================
   Message System (for profanity and validation alerts)
   ========================================================================== */
.mensaje {
    position: fixed;
    top: 20px;
    right: 20px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    max-width: 400px;
    z-index: var(--z-modal);
    transform: translateX(420px);
    opacity: 0;
    transition: all var(--transition-normal);
    border-left: 4px solid var(--error-color);
}

.mensaje-show {
    transform: translateX(0);
    opacity: 1;
}

.mensaje-error {
    border-left-color: var(--error-color);
}

.mensaje-error i {
    color: var(--error-color);
}

.mensaje-warning {
    border-left-color: var(--warning-color);
}

.mensaje-warning i {
    color: var(--warning-color);
}

.mensaje-success {
    border-left-color: var(--success-color);
}

.mensaje-success i {
    color: var(--success-color);
}

.mensaje span {
    flex: 1;
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

.mensaje-close {
    background: none;
    border: none;
    color: #6b7280;
    cursor: pointer;
    padding: 2px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mensaje-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--primary-color);
}

/* Shake animation for invalid fields */
@keyframes shake {
    0%, 20%, 40%, 60%, 80% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
}

/* Enhanced error state for fields */
.form-group.error .form-input,
.form-group.error .form-select,
.form-group.error .form-textarea {
    border-color: var(--error-color);
    background-color: rgba(231, 76, 60, 0.05);
    animation: shake 0.5s ease-in-out;
}

.form-group.error .form-label {
    color: var(--error-color);
}

/* Warning state for real-time profanity detection */
.form-group.warning .form-input,
.form-group.warning .form-select,
.form-group.warning .form-textarea {
    border-color: var(--warning-color);
    background-color: rgba(243, 156, 18, 0.05);
}

.form-group.warning .form-label {
    color: var(--warning-color);
}

/* Mobile responsive messages */
@media (max-width: 768px) {
    .mensaje {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
        transform: translateY(-100px);
    }
    
    .mensaje-show {
        transform: translateY(0);
    }
}

/* ==========================================================================
   Back to Top Button (igual que en index)
   ========================================================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   Mejoras visuales adicionales
   ========================================================================== */

/* Mejorar el contraste en campos de texto */
.form-input::placeholder,
.form-textarea::placeholder {
    color: #9ca3af;
    opacity: 1;
}

.form-select option {
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-xs);
}

/* Añadir efectos hover más pronunciados */
.form-section:hover {
    box-shadow: 0 8px 25px rgba(188, 60, 231, 0.1);
    transform: translateY(-2px);
    transition: all var(--transition-normal);
}

/* Mejorar la visibilidad de los iconos */
.form-label i,
.section-title i {
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

/* Efectos de foco mejorados */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    background: #fefefe;
}

/* Estilos para campos obligatorios */
.form-group.required .form-label::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 100%;
    background: var(--accent-color);
    border-radius: var(--radius-sm);
    opacity: 0.3;
}

.form-group.required {
    position: relative;
}

/* Responsive improvements for mobile */
@media (max-width: 480px) {
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
    }
    
    .form-section {
        padding: var(--spacing-lg);
    }
    
    .form-section::before {
        width: 3px;
    }
}

/* Print styles */
@media print {
    .header,
    .back-to-top,
    .official-header {
        display: none;
    }
    
    .registro-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .form-section {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #eee;
    }
}