/* Modern CSS 2026 - Mobile First Design - Dark Professional */

:root {
    /* Colors - Dark Professional Palette */
    --primary: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --accent: #f97316;
    --success: #10b981;
    --danger: #dc2626;
    --warning: #f59e0b;
    
    /* Neutrals */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Semantic Colors - Always light for dark background */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #cbd5e1;
    --border: #334155;
    
    /* Effects */
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    
    /* Glass effect - Updated for dark theme */
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(59, 130, 246, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, 
        #1e293b 0%, 
        #334155 35%,
        #475569 100%
    );
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
    .container { padding: 0 var(--spacing-lg); }
}

@media (min-width: 1024px) {
    .container { padding: 0 var(--spacing-2xl); }
}

/* Header & Navigation */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-base);
}

header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-lg);
    position: relative;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
    transition: transform var(--transition-base);
    z-index: 1001;
}

.navbar-brand i {
    font-size: 1.75rem;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-brand .brand-text {
    display: none;
}

@media (min-width: 640px) {
    .navbar-brand .brand-text {
        display: inline;
    }
}

.navbar-brand:hover {
    transform: scale(1.05);
}

/* Menu Toggle Button */
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 1001;
    font-size: 1.25rem;
}

.menu-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.menu-toggle.active {
    background: var(--danger);
}

.menu-toggle.active i:before {
    content: "\f00d";
}

/* Menu Dropdown */
.menu-dropdown {
    position: fixed;
    top: 80px;
    right: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm);
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--transition-base);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.menu-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 500;
    font-size: 0.9375rem;
}

.menu-item i {
    width: 20px;
    font-size: 1.125rem;
    color: var(--primary);
    transition: transform var(--transition-fast);
}

.menu-item:hover {
    background: rgba(37, 99, 235, 0.1);
    transform: translateX(4px);
}

.menu-item:hover i {
    transform: scale(1.15);
}

/* Main Content */
main {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 73px);
}

@media (min-width: 768px) {
    main {
        padding: var(--spacing-3xl) 0;
    }
}

/* Glass Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.jumbotron {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-2xl);
}

@media (min-width: 768px) {
    .jumbotron {
        padding: var(--spacing-3xl);
    }
}
/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    color: #ffffff;
}

h3 {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    font-weight: 600;
    color: #ffffff;
}

p {
    margin-bottom: var(--spacing-md);
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Phrase Cards */
.phrase-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    height: 100%;
}

.phrase-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.phrase-card:hover {
    transform: scale(1.02);
    border-color: var(--primary);
}

.phrase-card:hover::before {
    opacity: 1;
}

.phrase-card h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.phrase-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    flex: 1;
    min-width: 200px;
    font-size: 1.125rem;
    line-height: 1.5;
}

.phrase-link:hover {
    color: var(--primary);
}

/* Share Buttons */
.share-buttons {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.share-btn:hover {
    transform: translateY(-2px) scale(1.1);
    box-shadow: var(--shadow-md);
}

.share-btn.twitter {
    background: #1da1f2;
    border-color: #1da1f2;
}

.share-btn.whatsapp {
    background: var(--success);
    border-color: var(--success);
}

.share-btn img {
    width: 20px;
    height: 20px;
}

.twitter-hashtag-button {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.twitter-hashtag-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.whatsapp-icon {
    width: 24px;
    height: 24px;
    transition: transform var(--transition-fast);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.whatsapp-icon:hover {
    transform: scale(1.15);
}

/* Lists - Grid Layout */
ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

@media (max-width: 640px) {
    ul {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    ul {
        grid-template-columns: repeat(2, 1fr);
    }
}

ul li {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

ul li::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity var(--transition-base);
}

ul li:hover {
    transform: scale(1.02);
    border-color: var(--primary);
}

ul li:hover::before {
    opacity: 1;
}

.phrase {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.phrase:hover {
    opacity: 0.8;
}

.crews {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.crews:hover {
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: none;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-slow);
}

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

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

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

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--primary);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
}

.btn-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

@media (max-width: 640px) {
    .btn {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    .btn-group {
        flex-direction: column;
    }
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-xl);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

textarea {
    min-height: 120px;
    resize: vertical;
}

/* Alert Messages */
.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    animation: slideIn var(--transition-base);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.alert-error {
    border-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    border-color: var(--primary);
    color: var(--primary);
}

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

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.badge-secondary {
    background: var(--secondary);
}

.badge-success {
    background: var(--success);
}

.badge-danger {
    background: var(--danger);
}

/* Images */
.img-fluid {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

/* Utilities */
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-8 { margin-bottom: var(--spacing-xl); }
.mb-10 { margin-bottom: var(--spacing-2xl); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-8 { margin-top: var(--spacing-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-sm); }
.gap-4 { gap: var(--spacing-lg); }

.float-right { float: right; }

.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;
}

/* Responsive Design - Mobile First */
@media (max-width: 640px) {
    :root {
        font-size: 14px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .jumbotron {
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
    }
    
    ul li,
    .phrase-card {
        padding: var(--spacing-lg);
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.875rem; }
}

@media (min-width: 1025px) {
    .container {
        padding: 0 var(--spacing-2xl);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
    animation: slideInLeft 0.5s ease-out;
}

/* Scroll Animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Hover Effects */
.hover-lift {
    transition: all var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

/* Print Styles */
@media print {
    body {
        background: white;
    }
    
    header,
    .btn,
    .share-buttons {
        display: none;
    }
    
    .card,
    .phrase-card,
    ul li {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Accessibility */
.focus-visible:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --border: #ffffff;
    }
    
    .card,
    .phrase-card,
    ul li {
        border: 2px solid #ffffff;
    }
}

/* CAROUSEL STYLES - Modern 2026
-------------------------------------------------- */

.carousel {
    margin-bottom: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
}

.carousel-caption {
    bottom: var(--spacing-2xl);
    z-index: 10;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    color: #ffffff;
}

.carousel-item {
    height: 32rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.carousel-item > img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    top: 0;
    left: 0;
    max-width: 100%;
    height: 52rem;
    object-fit: cover;
    border-radius: var(--radius-2xl);
}

/* MARKETING CONTENT */
.marketing .col-lg-4 {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.marketing h2 {
    font-weight: 600;
    color: #ffffff;
}

.marketing .col-lg-4 p {
    margin-right: var(--spacing-md);
    margin-left: var(--spacing-md);
    color: var(--text-secondary);
}

/* Featurettes */
.featurette-divider {
    margin: var(--spacing-3xl) 0;
    border-color: var(--border);
}

.featurette-heading {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: #ffffff;
}

/* RESPONSIVE CSS FOR CAROUSEL */
@media (min-width: 40em) {
    .carousel-caption p {
        margin-bottom: var(--spacing-lg);
        font-size: 1.25rem;
        line-height: 1.4;
    }

    .featurette-heading {
        font-size: 3rem;
    }
}

@media (min-width: 62em) {
    .featurette-heading {
        margin-top: var(--spacing-3xl);
    }
}

/* ADDITIONAL OVERRIDES FOR CLARITY */
.lead {
    margin-bottom: var(--spacing-2xl);
    color: var(--text-secondary);
}

.card-title {
    color: #ffffff;
}

/* WhatsApp styles */
.whatsapp {
    display: none;
    color: #25d366;
}

.whatsapp:hover, 
.whatsapp:focus {
    background: #25d366;
    color: #fff;
}

.whatsapp.activeWhatsapp {
    display: inline-block;
}