:root {
    --bs-primary-rgb: 44, 62, 80;
    --bs-secondary-rgb: 236, 240, 241;
    --bs-dark-rgb: 35, 45, 57;
    --font-headings: 'Poppins', sans-serif;
    --font-body: 'Lato', sans-serif;
    
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #2c3e50;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --card-shadow: rgba(0, 0, 0, 0.1);
    --navbar-bg: #212529;
    --navbar-text: #ffffff;
    --hero-bg: #2c3e50;
    --hero-text: #ffffff;
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --badge-bg: #e9ecef;
    --badge-text: #212529;
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-dark: #0d0d0d;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --text-muted: #adb5bd;
    --border-color: #404040;
    --card-bg: #2d2d2d;
    --card-shadow: rgba(0, 0, 0, 0.3);
    --navbar-bg: #0d0d0d;
    --navbar-text: #e9ecef;
    --hero-bg: #1a1a1a;
    --hero-text: #e9ecef;
    --input-bg: #2d2d2d;
    --input-border: #404040;
    --badge-bg: #404040;
    --badge-text: #e9ecef;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6, .navbar-brand, .btn {
    font-family: var(--font-headings);
    font-weight: 700;
}

.hero {
    background-color: var(--hero-bg);
    color: var(--hero-text);
    padding: 100px 0;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.hero img {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border: 5px solid rgba(255, 255, 255, 0.2);
}

.section-title {
    font-weight: 700;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 10px;
}

.section-title::after {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: rgb(var(--bs-primary-rgb));
}

.service-icon {
    font-size: 3rem;
    color: rgb(var(--bs-primary-rgb));
}

/* Service Cards */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 1rem;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15) !important;
}

.service-card .card-body {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.service-card h3 {
    font-weight: 600;
    color: var(--text-primary);
}

.service-card .card-text {
    font-size: 0.95rem;
    line-height: 1.6;
}

.badge-logo img {
    max-width: 120px;
    transition: all 0.3s ease;
}

.badge-logo img:hover {
    transform: scale(1.05);
}

.badge-item {
    margin-bottom: 2rem;
}

.badge-logo img, .badge-logo {
    max-width: 80px;
    max-height: 80px;
    width: auto;
    height: auto;
    margin: 0 auto;
    display: block;
}

@media (max-width: 576px) {
    .hero {
        padding: 50px 0;
    }
    .hero img {
        width: 120px;
        height: 120px;
    }
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 24px;
    }
    .badge-logo img, .badge-logo {
        max-width: 60px;
        max-height: 60px;
    }
    .badge-item {
        margin-bottom: 1rem;
    }
    .service-icon {
        font-size: 2.5rem;
    }
    .service-card {
        margin-bottom: 1rem;
    }
    .service-card .card-body {
        padding: 2rem 1.5rem !important;
    }
    .service-card h3 {
        font-size: 1.25rem;
        margin-bottom: 1rem !important;
    }
    .service-card .card-text {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    .card-title {
        font-size: 1.1rem;
    }
    .card-text {
        font-size: 0.95rem;
    }
    .navbar-brand span {
        font-size: 1.1rem;
    }
    .footer {
        font-size: 0.95rem;
    }
}

/* Hover effect for event cards */
.hover-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

/* Navbar link color y viñeta/icono */
.navbar-dark .navbar-nav .nav-link {
    color: #ffc107 !important; /* Amarillo Bootstrap para destacar */
    font-weight: 600;
    position: relative;
    padding-left: 1.8em;
    transition: color 0.2s;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link.active {
    color: #fff200 !important; /* Más claro al pasar el mouse */
}

.navbar-dark .navbar-nav .nav-link::before {
    content: "\f058"; /* FontAwesome check-circle */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    left: 0.5em;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1em;
    color: #ffc107;
    opacity: 0.8;
    transition: color 0.2s;
}

.navbar-dark .navbar-nav .nav-link:hover::before,
.navbar-dark .navbar-nav .nav-link.active::before {
    color: #fff200;
    opacity: 1;
}

/* =====
===================================
   SCROLL ANIMATIONS
   ======================================== */

/* Fade in animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Fade in from left */
.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Fade in from right */
.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Scale up animation */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger animation delays for multiple items */
.fade-in:nth-child(1) { transition-delay: 0.1s; }
.fade-in:nth-child(2) { transition-delay: 0.2s; }
.fade-in:nth-child(3) { transition-delay: 0.3s; }
.fade-in:nth-child(4) { transition-delay: 0.4s; }
.fade-in:nth-child(5) { transition-delay: 0.5s; }
.fade-in:nth-child(6) { transition-delay: 0.6s; }

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .fade-in,
    .fade-in-left,
    .fade-in-right,
    .scale-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
}


/* ========================================
   FILTERS
   ======================================== */

/* Filter buttons */
.btn-outline-primary.active {
    background-color: rgb(var(--bs-primary-rgb));
    color: white;
    border-color: rgb(var(--bs-primary-rgb));
}

.btn-outline-primary {
    transition: all 0.3s ease;
}

.btn-outline-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Filter badges */
.btn .badge {
    font-size: 0.75rem;
    padding: 0.25em 0.5em;
}

.btn-outline-primary.active .badge {
    background-color: rgba(255, 255, 255, 0.3) !important;
    color: white;
}

/* Gap utility for older browsers */
.gap-2 {
    gap: 0.5rem;
}


/* ========================================
   SEARCH
   ======================================== */

/* Search input styling */
#event-search,
#article-search {
    border-left: none;
    font-size: 1rem;
}

#event-search:focus,
#article-search:focus {
    border-color: #dee2e6;
    box-shadow: none;
}

.input-group-text {
    border-right: none;
}

#event-search:focus + .input-group-text,
#article-search:focus + .input-group-text {
    border-color: #dee2e6;
}

/* Clear button */
#clear-search,
#clear-article-search {
    transition: all 0.3s ease;
}

#clear-search:hover,
#clear-article-search:hover {
    background-color: #dc3545;
    color: white;
    border-color: #dc3545;
}

/* Search hint */
#search-hint,
#article-search-hint {
    font-size: 0.875rem;
}

/* Highlight search results */
.search-highlight {
    background-color: #fff3cd;
    padding: 0 2px;
    border-radius: 2px;
}

/* No results message */
.no-results {
    text-align: center;
    padding: 3rem 1rem;
    color: #6c757d;
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}


/* ========================================
   ACCESSIBILITY
   ======================================== */

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
    font-weight: bold;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid #fff200;
    outline-offset: 2px;
}

/* Enhanced Focus Styles */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

.btn:focus {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.5);
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

/* Remove focus for mouse users */
*:focus:not(:focus-visible) {
    outline: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-outline-primary {
        border-width: 2px;
    }
    
    .card {
        border-width: 2px;
    }
}

/* Reduced motion support (already implemented but ensuring) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Ensure sufficient color contrast for badges */
.badge.bg-warning {
    color: #000 !important;
}

.badge.bg-info {
    color: #000 !important;
}


/* ========================================
   RESPONSIVE IMPROVEMENTS
   ======================================== */

/* Mobile First - Extra Small Devices (< 576px) */
@media (max-width: 575.98px) {
    /* Typography adjustments */
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
    
    /* Hero section */
    .hero {
        padding: 40px 0;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .hero p {
        font-size: 0.95rem;
    }
    
    /* Section titles */
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    /* Cards */
    .card {
        margin-bottom: 1rem;
    }
    
    .card-title {
        font-size: 1.1rem;
    }
    
    .card-text {
        font-size: 0.9rem;
    }
    
    /* Buttons - Larger touch targets */
    .btn {
        min-height: 44px;
        min-width: 44px;
        padding: 0.5rem 1rem;
        font-size: 0.95rem;
    }
    
    .btn-lg {
        min-height: 48px;
        padding: 0.75rem 1.25rem;
    }
    
    /* Filter buttons */
    .btn-outline-primary {
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
    }
    
    /* Search input */
    .input-group-lg .form-control {
        font-size: 1rem;
    }
    
    /* Badges */
    .badge {
        font-size: 0.75rem;
        padding: 0.35em 0.65em;
    }
    
    /* Navbar */
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .nav-link {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }
    
    /* Certification badges */
    .badge-logo img {
        max-width: 80px;
    }
    
    /* Service icons */
    .service-icon {
        font-size: 2rem;
    }
    
    /* Spacing */
    .py-5 {
        padding-top: 2rem !important;
        padding-bottom: 2rem !important;
    }
    
    .mb-5 {
        margin-bottom: 2rem !important;
    }
    
    /* Container padding */
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Small Devices (576px - 767px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    /* Typography */
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    /* Hero */
    .hero h1 {
        font-size: 1.75rem;
    }
    
    /* Certification badges */
    .badge-logo img {
        max-width: 100px;
    }
    
    /* Cards in grid */
    .col-sm-6 {
        margin-bottom: 1.5rem;
    }
}

/* Medium Devices - Tablets (768px - 991px) */
@media (min-width: 768px) and (max-width: 991.98px) {
    /* Hero */
    .hero {
        padding: 70px 0;
    }
    
    /* Section spacing */
    .py-5 {
        padding-top: 3rem !important;
        padding-bottom: 3rem !important;
    }
    
    /* Cards */
    .card-body {
        padding: 1.25rem;
    }
    
    /* Filter buttons - better spacing */
    .gap-2 {
        gap: 0.75rem !important;
    }
}

/* Large Devices - Desktops (992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .container {
        max-width: 960px;
    }
}

/* Extra Large Devices (≥ 1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Larger touch targets */
    a, button, input, select, textarea {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Remove hover effects on touch devices */
    .hover-card:hover {
        transform: none;
        box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
    }
    
    /* Larger tap areas for links */
    .nav-link {
        padding: 0.75rem 1rem;
    }
    
    /* Better spacing for filter buttons */
    .btn-outline-primary {
        margin: 0.25rem;
        padding: 0.5rem 1rem;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 767.98px) and (orientation: landscape) {
    .hero {
        padding: 30px 0;
    }
    
    .py-5 {
        padding-top: 1.5rem !important;
        padding-bottom: 1.5rem !important;
    }
}

/* Print styles */
@media print {
    .navbar,
    .skip-link,
    .btn,
    footer {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
    }
}

/* Fix for iOS Safari input zoom */
@media screen and (max-width: 767.98px) {
    input[type="text"],
    input[type="search"],
    textarea {
        font-size: 16px !important;
    }
}

/* Ensure images don't overflow on small screens */
@media (max-width: 575.98px) {
    img {
        max-width: 100%;
        height: auto;
    }
    
    .card-img-top {
        max-height: 200px;
        object-fit: cover;
    }
}


/* ============================================
   DARK MODE STYLES
   ============================================ */

/* Theme Toggle Button */
#theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#theme-toggle:hover {
    background-color: var(--bg-secondary);
    transform: scale(1.05);
}

#theme-toggle i {
    font-size: 1.1rem;
}

/* General Dark Mode Styles */
[data-theme="dark"] {
    /* Cards */
    .card {
        background-color: var(--card-bg);
        border-color: var(--border-color);
        color: var(--text-primary);
    }
    
    .card-body {
        background-color: var(--card-bg);
    }
    
    .card-title {
        color: var(--text-primary);
    }
    
    .card-text {
        color: var(--text-secondary);
    }
    
    /* Navbar */
    .navbar-dark {
        background-color: var(--navbar-bg) !important;
    }
    
    .navbar-brand,
    .nav-link {
        color: var(--navbar-text) !important;
    }
    
    /* Backgrounds */
    .bg-light {
        background-color: var(--bg-secondary) !important;
    }
    
    .bg-dark {
        background-color: var(--bg-dark) !important;
    }
    
    /* Text */
    .text-muted {
        color: var(--text-muted) !important;
    }
    
    .text-dark {
        color: var(--text-primary) !important;
    }
    
    /* Borders */
    .border,
    .border-top,
    .border-bottom {
        border-color: var(--border-color) !important;
    }
    
    /* Forms */
    .form-control,
    .form-select {
        background-color: var(--input-bg);
        border-color: var(--input-border);
        color: var(--text-primary);
    }
    
    .form-control:focus,
    .form-select:focus {
        background-color: var(--input-bg);
        border-color: #0d6efd;
        color: var(--text-primary);
    }
    
    .form-control::placeholder {
        color: var(--text-muted);
    }
    
    .input-group-text {
        background-color: var(--input-bg);
        border-color: var(--input-border);
        color: var(--text-primary);
    }
    
    /* Badges */
    .badge.bg-primary {
        background-color: #0d6efd !important;
    }
    
    .badge.bg-secondary {
        background-color: var(--badge-bg) !important;
        color: var(--badge-text) !important;
    }
    
    .badge.bg-info {
        background-color: #0dcaf0 !important;
        color: #000 !important;
    }
    
    .badge.bg-warning {
        background-color: #ffc107 !important;
        color: #000 !important;
    }
    
    /* Buttons */
    .btn-outline-primary {
        color: #0d6efd;
        border-color: #0d6efd;
    }
    
    .btn-outline-primary:hover {
        background-color: #0d6efd;
        color: #fff;
    }
    
    .btn-outline-secondary {
        color: var(--text-secondary);
        border-color: var(--border-color);
    }
    
    .btn-outline-secondary:hover {
        background-color: var(--bg-secondary);
        color: var(--text-primary);
    }
    
    /* Dropdowns */
    .dropdown-menu {
        background-color: var(--card-bg);
        border-color: var(--border-color);
    }
    
    .dropdown-item {
        color: var(--text-primary);
    }
    
    .dropdown-item:hover,
    .dropdown-item:focus {
        background-color: var(--bg-secondary);
        color: var(--text-primary);
    }
    
    .dropdown-item.active {
        background-color: #0d6efd;
        color: #fff;
    }
    
    /* Modals */
    .modal-content {
        background-color: var(--card-bg);
        border-color: var(--border-color);
    }
    
    .modal-header,
    .modal-footer {
        border-color: var(--border-color);
    }
    
    .modal-title {
        color: var(--text-primary);
    }
    
    .btn-close {
        filter: invert(1);
    }
    
    /* Shadows */
    .shadow,
    .shadow-sm,
    .shadow-lg {
        box-shadow: 0 0.5rem 1rem var(--card-shadow) !important;
    }
    
    /* Service Icons */
    .service-icon {
        color: var(--text-primary);
    }
    
    /* Service Cards */
    .service-card {
        background-color: var(--card-bg);
        border-color: var(--border-color);
    }
    
    .service-card:hover {
        box-shadow: 0 0.5rem 1.5rem var(--card-shadow) !important;
    }
    
    .service-card h3 {
        color: var(--text-primary);
    }
    
    .service-card .card-text {
        color: var(--text-secondary);
    }
    
    /* Spinner */
    .spinner-border {
        color: #0d6efd;
    }
    
    /* Footer */
    footer {
        background-color: var(--bg-dark) !important;
        color: var(--text-primary);
    }
    
    footer a {
        color: var(--text-primary) !important;
    }
    
    footer a:hover {
        color: #0d6efd !important;
    }
    
    /* Certification Badges */
    .badge-item img {
        filter: brightness(0.9);
    }
    
    /* Hover Cards */
    .hover-card {
        background-color: var(--card-bg);
        transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    }
    
    .hover-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 0.5rem 1.5rem var(--card-shadow);
    }
}

/* Smooth transitions for theme switching */
* {
    transition-property: background-color, border-color, color;
    transition-duration: 0.3s;
    transition-timing-function: ease;
}

/* Exclude transitions for specific elements */
.btn,
.nav-link,
a,
.hover-card {
    transition-property: all;
}

/* Theme toggle in navbar */
.navbar .theme-toggle-container {
    margin-left: 1rem;
}

@media (max-width: 991.98px) {
    .navbar .theme-toggle-container {
        margin-left: 0;
        margin-top: 0.5rem;
    }
    
    #theme-toggle {
        width: 100%;
        justify-content: center;
    }
}