/* CSS Variables - Дополнительная цветовая схема */
:root {
    /* Основные цвета */
    --primary-color: #ff6b35;
    --primary-dark: #e55a2b;
    --primary-light: #ff8c66;
    --secondary-color: #4a90e2;
    --secondary-dark: #3a7bc8;
    --secondary-light: #6ba3e8;
    --accent-color: #f39c12;
    --accent-dark: #e67e22;
    --accent-light: #f5b041;
    
    /* Дополнительные цвета */
    --complementary-color: #35a3ff;
    --complementary-dark: #2b8ae5;
    --complementary-light: #66b8ff;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    
    /* Нейтральные цвета */
    --dark-color: #2c3e50;
    --dark-light: #34495e;
    --light-color: #ecf0f1;
    --light-dark: #bdc3c7;
    --white: #ffffff;
    --black: #000000;
    --gray: #7f8c8d;
    --gray-light: #95a5a6;
    --gray-dark: #34495e;
    
    /* Градиенты */
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color), var(--complementary-color));
    --gradient-hero: linear-gradient(135deg, rgba(255, 107, 53, 0.9), rgba(74, 144, 226, 0.9));
    --gradient-overlay: linear-gradient(135deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.3));
    
    /* Типографика */
    --font-heading: 'Archivo Black', sans-serif;
    --font-body: 'Roboto', sans-serif;
    --font-size-h1: clamp(2.5rem, 5vw, 4rem);
    --font-size-h2: clamp(2rem, 4vw, 3rem);
    --font-size-h3: clamp(1.5rem, 3vw, 2rem);
    --font-size-h4: clamp(1.25rem, 2.5vw, 1.5rem);
    --font-size-body: clamp(1rem, 2vw, 1.125rem);
    --font-size-small: clamp(0.875rem, 1.5vw, 1rem);
    
    /* Размеры и отступы */
    --container-max-width: 1200px;
    --section-padding: clamp(3rem, 8vw, 6rem);
    --card-padding: clamp(1.5rem, 4vw, 2rem);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --border-radius-large: 20px;
    
    /* Тени */
    --shadow-small: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-large: 0 8px 30px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.25);
    
    /* Анимации */
    --transition-fast: 0.3s ease;
    --transition-medium: 0.5s ease;
    --transition-slow: 0.8s ease;
    --morph-transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Базовые стили */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

/* Типографика */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    color: var(--dark-color);
}

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

/* Кнопки */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--morph-transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::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: var(--transition-medium);
    z-index: -1;
}

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

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

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

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.navbar-brand h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin: 0;
}

.navbar-menu {
    display: flex;
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

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

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

.navbar-burger span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: var(--transition-fast);
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-overlay);
    z-index: -1;
}

.hero-content {
    text-align: center;
    color: var(--white);
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-h1);
    margin-bottom: 1.5rem;
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: var(--font-size-h4);
    margin-bottom: 2rem;
    color: var(--white);
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Statistics Section */
.statistics {
    padding: var(--section-padding) 0;
    background: var(--light-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    background: var(--white);
    padding: var(--card-padding);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-medium);
    transition: var(--morph-transition);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.125rem;
    color: var(--gray-dark);
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--light-dark);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    transition: width 2s ease;
}

/* Research Section */
.research {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.research-timeline {
    position: relative;
}

.research-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.timeline-item {
    position: relative;
    padding-left: 4rem;
    margin-bottom: 3rem;
}

.timeline-marker {
    position: absolute;
    left: 12px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: var(--shadow-small);
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.research-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

/* Portfolio Section */
.portfolio {
    padding: var(--section-padding) 0;
    background: var(--light-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

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

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

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

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

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

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

.card-content h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Gallery Section */
.gallery {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--morph-transition);
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition-medium);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-overlay);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white);
    opacity: 0;
    transition: var(--transition-medium);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-overlay h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.gallery-overlay p {
    color: var(--white);
    opacity: 0.9;
}

/* External Resources Section */
.external-resources {
    padding: var(--section-padding) 0;
    background: var(--light-color);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

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

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

.resource-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.resource-card .btn {
    margin-top: 1rem;
}

/* Pricing Section */
.pricing {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    text-align: center;
    box-shadow: var(--shadow-medium);
    transition: var(--morph-transition);
    position: relative;
    overflow: hidden;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card.featured::before {
    content: 'En Popüler';
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 5px 40px;
    font-size: 0.875rem;
    font-weight: 600;
    transform: rotate(45deg);
}

.pricing-header h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 1rem;
}

.price span {
    font-size: 1rem;
    color: var(--gray);
}

.pricing-features ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--gray-dark);
}

/* Testimonials Section */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--light-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--white);
    padding: var(--card-padding);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--morph-transition);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 20px;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.3;
}

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

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    font-style: italic;
    color: var(--gray-dark);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-info h4 {
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.author-info span {
    color: var(--gray);
    font-size: 0.875rem;
}

/* Community Section */
.community {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.community-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.community-text h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.community-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
}

.community-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

/* Contact Section */
.contact {
    padding: var(--section-padding) 0;
    background: var(--light-color);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.contact-details {
    margin-top: 2rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item h4 {
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--light-dark);
    border-radius: var(--border-radius-small);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.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(255, 107, 53, 0.1);
}

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

/* Footer */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: var(--section-padding) 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--light-dark);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid var(--gray-dark);
    padding-top: 2rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--light-dark);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--light-dark);
    text-decoration: none;
    padding: 0.5rem;
    transition: var(--transition-fast);
}

.social-links a:hover {
    color: var(--primary-color);
}

/* Popup */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.popup-content {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    text-align: center;
    position: relative;
}

.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.popup-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--gray);
}

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

/* Success Page */
.success-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-color);
    padding-top: 100px;
}

.success-content {
    text-align: center;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-large);
}

.success-icon {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 1rem;
}

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

.content-section {
    padding: var(--section-padding) 0;
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.content-section h3 {
    color: var(--dark-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content-section p {
    margin-bottom: 1.5rem;
}

.content-section ul {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.content-section li {
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 1rem;
        box-shadow: var(--shadow-medium);
        transform: translateY(-100%);
        transition: var(--transition-medium);
        display: none;
    }
    
    .navbar-menu.active {
        display: block;
        transform: translateY(0);
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .navbar-burger {
        display: flex;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .research-content {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .community-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
    
    .community-stats {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
    
    .card-content {
        padding: 1rem;
    }
    
    .pricing-card {
        padding: 1.5rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}

/* Анимации морфинг */
@keyframes morphIn {
    0% {
        opacity: 0;
        transform: scale(0.8) rotate(-5deg);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.1) rotate(2deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

@keyframes morphOut {
    0% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.1) rotate(-2deg);
    }
    100% {
        opacity: 0;
        transform: scale(0.8) rotate(5deg);
    }
}

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

.morph-out {
    animation: morphOut 0.6s ease-out;
}

/* Дополнительные утилиты */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

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

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

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

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }