:root {
    --primary: #00897b;
    --primary-light: #4db6ac;
    --primary-dark: #005b4f;
    --accent: #00bcd4;
    --bg-light: #f4f7f6;
    --text-main: #2c3e50;
    --text-muted: #576574;
    --white: #ffffff;
    --glass: rgba(255, 255, 255, 0.7);
    --glass-dark: rgba(0, 0, 0, 0.6);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bg-light { background-color: var(--bg-light); }
.bg-dark { background-color: #1a1a1a; }
.text-white { color: var(--white); }

/* Glass Navigation */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding: 18px 0;
}

.container-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    color: var(--primary-dark);
}

.logo-accent {
    color: var(--primary);
}

.desktop-nav a {
    text-decoration: none;
    color: var(--text-main);
    margin-left: 32px;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

.desktop-nav a:hover {
    color: var(--primary);
}

.btn-primary {
    background: var(--primary);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 137, 123, 0.3);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(circle at top right, rgba(0, 188, 212, 0.05), transparent 40%),
                radial-gradient(circle at bottom left, rgba(0, 137, 123, 0.05), transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content .badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 137, 123, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 16px;
}

.btn-primary-large {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline-large {
    border: 2px solid var(--primary);
    color: var(--primary);
    text-decoration: none;
    padding: 14px 30px;
    border-radius: 12px;
    font-weight: 600;
    transition: var(--transition);
}

.hero-visual {
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}

.hero-img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    display: block;
    border-radius: 24px;
}

.hero-card-floating {
    position: absolute;
    top: -30px;
    right: -20px;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 5;
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.ph-heartbeat-large {
    font-size: 40px;
    color: #e91e63;
}

.hero-card-text {
    display: flex;
    flex-direction: column;
}

/* Features Grid */
.section-header {
    margin-bottom: 60px;
}

.section-title {
    font-size: 40px;
    margin-bottom: 16px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 40px;
    border-radius: 24px;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.feature-card i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 24px;
    display: inline-block;
}

.feature-card h3 {
    margin-bottom: 16px;
    font-size: 20px;
}

.feature-card p {
    color: var(--text-muted);
}

.feature-card:hover {
    transform: translateY(-10px);
    background: linear-gradient(135deg, var(--white), var(--bg-light));
    border-color: var(--primary-light);
}

/* Blocks Section */
.blocks-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.blocks-container.grid-2x2 {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
    .blocks-container.grid-2x2 {
        grid-template-columns: 1fr;
    }
}

.block-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    border-radius: 16px;
    background: var(--white);
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    transition: var(--transition);
}

.block-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    flex-shrink: 0;
}

.bg-cyan { background: #00bcd4; }
.bg-teal { background: #00897b; }
.bg-blue { background: #1e88e5; }
.bg-indigo { background: #3949ab; }

.block-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-more i {
    transition: transform 0.3s ease;
}

.btn-more:hover {
    color: var(--accent);
}

.btn-more:hover i {
    transform: translateX(4px);
}

/* Workflow Section */
.workflow-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding-top: 40px;
    gap: 20px;
}

.workflow-steps::before {
    content: '';
    position: absolute;
    top: 80px;
    left: 5%;
    width: 90%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
    z-index: 1;
}

.workflow-step {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--white);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

.workflow-step:hover .step-icon {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-8px) rotate(5deg);
}

.step-number {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
    opacity: 0.8;
}

.step-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-main);
}

.step-content p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Glass Effect */
.glass {
    background: rgba(255, 255, 255, 0.1) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
}

/* Custom CTA */
.custom-cta {
    background: linear-gradient(135deg, #004d40, #00251a);
    color: white;
    overflow: hidden;
    position: relative;
}

.custom-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.custom-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 100px;
    align-items: center;
}

.custom-content {
    max-width: 700px;
}

.custom-content h2 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 24px;
}

.custom-content p {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.custom-badge {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    text-align: center;
    padding: 20px;
    transition: var(--transition);
}

.custom-badge:hover {
    transform: rotate(5deg) scale(1.05);
    background: rgba(255, 255, 255, 0.15) !important;
}

.custom-badge i { 
    font-size: 64px; 
    color: var(--accent);
    filter: drop-shadow(0 0 10px rgba(0, 188, 212, 0.5));
}

.custom-badge span {
    font-weight: 600;
    font-size: 15px;
    line-height: 1.3;
}

/* Demo Section */
.demo-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.demo-list {
    list-style: none;
    margin-top: 32px;
}

.demo-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 18px;
}

.demo-list i { color: var(--accent); font-size: 24px; }

.glass-dark {
    background: rgba(255,255,255,0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 24px;
    padding: 40px;
}

.mockup-header {
    display: flex;
    gap: 8px;
    margin-bottom: 30px;
}

.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 20px;
    height: 200px;
    margin-bottom: 30px;
}

.bar {
    flex: 1;
    background: rgba(255,255,255,0.1);
    border-radius: 8px 8px 0 0;
    transition: var(--transition);
}

.bar.active {
    background: linear-gradient(to top, var(--primary), var(--accent));
    box-shadow: 0 0 20px rgba(0, 188, 212, 0.4);
}

/* Institutional Collaborators Section */
.collaborators {
    position: relative;
    background: radial-gradient(circle at 10% 10%, rgba(0, 137, 123, 0.03), transparent 30%),
                radial-gradient(circle at 90% 90%, rgba(0, 188, 212, 0.03), transparent 30%);
}

.logos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
    margin-top: 50px;
    align-items: center;
}

.logo-item {
    padding: 30px;
    border-radius: 24px;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    height: 160px;
    border: 1px solid rgba(0,0,0,0.03);
    box-shadow: var(--shadow);
}

.logo-item img {
    max-width: 100%;
    max-height: 90px;
    object-fit: contain;
    filter: grayscale(100%) contrast(0.8);
    opacity: 0.6;
    transition: all 0.4s ease;
}

.logo-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
    background: var(--white);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.logo-item:hover img {
    filter: none;
    opacity: 1;
}

/* Team Section */
.team-swiper {
    padding: 20px 0 60px !important;
}

.team-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    text-align: center;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.team-img-wrapper {
    width: 140px;
    height: 140px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.team-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.team-placeholder {
    width: 100%;
    height: 100%;
    display: none; /* Shown via JS onerror */
    align-items: center;
    justify-content: center;
    font-size: 50px;
    color: white;
}

.team-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-main);
}

.team-info p {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 12px;
}

.researcher-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 6px 12px;
    background: rgba(var(--primary-rgb), 0.05);
    border-radius: 20px;
}

.researcher-link i {
    font-size: 16px;
}

.researcher-link:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.2);
}

.swiper-button-next, .swiper-button-prev {
    color: var(--primary) !important;
}

.swiper-pagination-bullet-active {
    background: var(--primary) !important;
}

/* Research Section */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.research-item {
    padding: 30px;
    border-radius: 20px;
}

.research-item h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--primary);
}

.research-item h3 i {
    font-size: 24px;
}

.research-item ul {
    list-style: none;
    padding: 0;
}

.research-item ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-light);
}

.research-item ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.pub-highlight {
    font-style: italic;
    color: var(--text-main);
    margin-bottom: 20px;
    line-height: 1.6;
}

.research-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.research-link:hover {
    gap: 12px;
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.project-links .badge {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.project-links .badge:hover {
    background: var(--primary);
    color: var(--white);
}

/* Institutional Logos */
.institutional-logos {
    margin-top: 20px;
    display: flex;
    gap: 20px;
}

.institutional-logos img {
    transition: var(--transition);
}

.institutional-logos img:hover {
    filter: none !important;
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 80px;
}

.contact-form-container {
    padding: 40px;
    border-radius: 24px;
    background: var(--white);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 12px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 137, 123, 0.1);
}

.captcha-group .captcha-input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.captcha-challenge {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 15px;
    border-radius: 8px;
    font-weight: 600;
    color: var(--primary);
    min-width: 100px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

#captcha {
    max-width: 100px;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    transition: color 0.3s;
}

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

.btn-primary-full {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.form-status {
    margin-top: 20px;
    padding: 15px;
    border-radius: 12px;
    text-align: center;
}

.success-msg { background: #e8f5e9; color: #2e7d32; }
.error-msg { background: #ffebee; color: #c62828; }
.hidden { display: none; }

/* Footers */
.main-footer {
    padding: 100px 0 0;
    background: linear-gradient(to bottom, #ffffff, #f0f7f4);
    position: relative;
    overflow: hidden;
}

.main-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
    position: relative;
    z-index: 2;
}

.footer-brand-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.footer-ua-icon {
    height: 48px;
    width: auto;
    border-radius: 8px;
}

.footer-brand .logo {
    color: var(--primary);
    font-size: 32px;
    font-weight: 800;
    line-height: 1;
}

.footer-mission {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 320px;
}

.footer-nav h4, .footer-contact h4, .footer-logos h4 {
    color: var(--text-main);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    position: relative;
}

.footer-nav ul, .footer-contact ul {
    list-style: none;
    padding: 0;
}

.footer-nav ul li, .footer-contact ul li {
    margin-bottom: 14px;
}

.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.footer-nav a:hover {
    color: var(--primary);
    transform: translateX(5px);
    display: inline-block;
}

.footer-contact li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    color: var(--text-muted);
    font-size: 15px;
}

.footer-contact li i {
    color: var(--primary);
    font-size: 20px;
}

.footer-contact a {
    color: inherit;
    text-decoration: none;
}

.footer-logos .logo-stack {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.inst-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
    padding: 12px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.02);
}

.inst-logo img {
    height: 35px;
    filter: grayscale(1);
    opacity: 0.7;
    transition: var(--transition);
}

.tys-logo {
    font-weight: 900;
    font-size: 20px;
    letter-spacing: -1px;
    color: var(--primary);
}

.inst-logo small {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
}

.inst-logo:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.inst-logo:hover img { 
    filter: none;
    opacity: 1; 
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--white);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 18px;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.social-link:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px) rotate(8deg);
}

/* Sub-footer */
.sub-footer {
    padding: 40px 0;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.sub-footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-muted);
}

.legal-links {
    display: flex;
    gap: 24px;
}

.legal-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Responsive adjustments */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .sub-footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* Responsive */
@media (max-width: 992px) {
    .hero-grid, .contact-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-btns { justify-content: center; }
    .hero-content h1 { font-size: 42px; }
    .hero-card-floating { display: none; }
    .demo-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    
    .workflow-steps {
        flex-wrap: wrap;
        justify-content: center;
    }
    .workflow-steps::before { display: none; }
    .workflow-step { flex: 1 1 30%; }
}

@media (max-width: 768px) {
    .workflow-step { flex: 1 1 45%; }
}

@media (max-width: 480px) {
    .workflow-step { flex: 1 1 100%; }
}

@media (max-width: 768px) {
    .desktop-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        padding: 20px;
        flex-direction: column;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }
    .desktop-nav.active { display: flex; }
    .desktop-nav a { margin: 10px 0; }
    .mobile-menu-btn { display: block; }
}