/* CSS Variables */
:root {
    /* Split-Complementary Color Scheme */
    --primary-color: #00d4ff;
    --secondary-color: #ff6b00;
    --accent-color: #ff0080;
    --tertiary-color: #80ff00;
    
    /* Darker variants */
    --primary-dark: #00a6cc;
    --secondary-dark: #cc5500;
    --accent-dark: #cc0066;
    --tertiary-dark: #66cc00;
    
    /* Neutral colors */
    --white: #ffffff;
    --black: #000000;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    
    /* Text colors */
    --text-primary: #222222;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --text-muted: #999999;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--tertiary-color));
    --gradient-dark: linear-gradient(135deg, rgba(0,0,0,0.8), rgba(0,0,0,0.6));
    --gradient-overlay: linear-gradient(135deg, rgba(0,212,255,0.9), rgba(255,0,128,0.9));
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 12px 32px rgba(0,0,0,0.25);
    
    /* Borders */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 20px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-heading: 'Roboto', sans-serif;
    --font-body: 'Lato', sans-serif;
    
    /* Transitions */
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-morph: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-heading);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-morph);
    transform: perspective(1000px) rotateX(0deg);
    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: var(--transition-base);
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: perspective(1000px) rotateX(-5deg) translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: perspective(1000px) rotateX(-5deg) translateY(-2px);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.logo h1 {
    font-size: 1.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-md);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition-base);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-overlay);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Common Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

/* About Section */
.about-section {
    background: var(--gray-100);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-text h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-morph);
}

.about-image img:hover {
    transform: scale(1.05) rotate(2deg);
}

/* Statistics Section */
.statistics-section {
    background: var(--gradient-primary);
    color: var(--white);
}

.statistics-section .section-header h2,
.statistics-section .section-header p {
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    transition: var(--transition-morph);
}

.stat-card:hover {
    transform: translateY(-10px) scale(1.05);
    background: rgba(255,255,255,0.2);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1.1rem;
    color: var(--white);
    opacity: 0.9;
}

/* Cards Grid */
.cases-grid,
.blog-grid,
.partners-grid,
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-morph);
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    overflow: hidden;
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-morph);
}

.card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    text-align: center;
}

.card-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Case Studies */
.case-studies-section {
    background: var(--gray-100);
}

.case-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-morph);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Innovation Section */
.innovation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.innovation-text h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.innovation-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Accordion */
.accordion-container {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--white);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.accordion-header {
    padding: var(--spacing-md);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gradient-primary);
    color: var(--white);
    transition: var(--transition-base);
}

.accordion-header:hover {
    background: var(--gradient-secondary);
}

.accordion-header h3 {
    margin: 0;
    color: var(--white);
}

.accordion-toggle {
    font-size: 1.5rem;
    font-weight: bold;
    transition: var(--transition-base);
}

.accordion-item.active .accordion-toggle {
    transform: rotate(45deg);
}

.accordion-content {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-slow);
}

.accordion-item.active .accordion-content {
    padding: var(--spacing-md);
    max-height: 200px;
}

/* Resources Section */
.resources-section {
    background: var(--gray-100);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.resource-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-morph);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.resource-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-primary);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.resource-link:hover {
    background: var(--gradient-secondary);
    transform: translateY(-2px);
}

/* Partners Section */
.partners-section {
    background: var(--gray-100);
}

.partner-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-morph);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.partner-card img {
    width: 100%;
    max-width: 200px;
    height: 100px;
    object-fit: contain;
    margin-bottom: var(--spacing-sm);
}

/* Blog Section */
.blog-section {
    background: var(--gray-100);
}

.blog-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-morph);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--gray-200);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.category {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
}

/* Events Section */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.event-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    display: flex;
    gap: var(--spacing-md);
    transition: var(--transition-morph);
}

.event-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.event-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
}

.event-date .day {
    font-size: 2rem;
    font-weight: bold;
    line-height: 1;
}

.event-date .month {
    font-size: 0.9rem;
    text-transform: uppercase;
}

.event-content {
    flex: 1;
}

.event-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.event-meta .price {
    font-weight: bold;
    color: var(--secondary-color);
}

/* Sustainability Section */
.sustainability-section {
    background: var(--gray-100);
}

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.sustainability-text h3 {
    color: var(--tertiary-color);
    margin-bottom: var(--spacing-sm);
}

.sustainability-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Contact Section */
.contact-section {
    background: var(--gradient-primary);
    color: var(--white);
}

.contact-section .section-header h2,
.contact-section .section-header p {
    color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-info {
    background: rgba(255,255,255,0.1);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.contact-info h3 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

.contact-item strong {
    color: var(--white);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--white);
    opacity: 0.9;
    margin: 0;
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}

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

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: var(--gray-300);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

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

.footer-section ul li a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-base);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-700);
    color: var(--gray-400);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 15% auto;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}

.close {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition-base);
}

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

/* Success Page */
.success-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.success-content {
    max-width: 600px;
    padding: var(--spacing-lg);
}

.success-content h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.success-content p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

/* About, Terms, Privacy Pages */
.page-content {
    padding-top: 100px;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    background: var(--gradient-primary);
    color: var(--white);
}

.page-header h1 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--white);
    font-size: 1.2rem;
}

.page-section {
    margin-bottom: var(--spacing-xl);
}

.page-section h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.page-section h3 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        transition: var(--transition-base);
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-content,
    .innovation-content,
    .sustainability-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .cases-grid,
    .blog-grid,
    .partners-grid,
    .events-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .event-card {
        flex-direction: column;
        text-align: center;
    }
    
    .event-date {
        min-width: auto;
        width: 100px;
        margin: 0 auto var(--spacing-sm);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes morphing {
    0% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.05) rotate(2deg); }
    100% { transform: scale(1) rotate(0deg); }
}

.morph-hover:hover {
    animation: morphing 0.6s ease-in-out;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }