/* --- VENVIO Design System --- */
:root {
    --color-bg-dark: #0A0F1A;
    --color-bg-panel: rgba(18, 25, 40, 0.6);
    --color-primary: #00D2FF;
    --color-primary-hover: #00B4D8;
    --color-secondary: #3A86FF;
    --color-text: #F8FAFC;
    --color-text-muted: #94A3B8;
    --color-border: rgba(255, 255, 255, 0.1);
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
}

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

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Glassmorphism */
.glass-panel {
    background: var(--color-bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    font-family: var(--font-body);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 210, 255, 0.5);
}

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

.btn-outline:hover {
    background: rgba(0, 210, 255, 0.1);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    letter-spacing: 2px;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

.lang-btn {
    background: transparent;
    border: none;
    color: inherit;
    font-family: var(--font-body);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn:hover {
    color: var(--color-text);
}

.lang-btn.active {
    color: var(--color-primary);
}

.cart-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.cart-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.cart-badge {
    background: var(--color-primary);
    color: var(--color-bg-dark);
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 800;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    border-radius: 3px;
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--color-text-muted);
    font-size: 1.2rem;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,210,255,0.15) 0%, rgba(10,15,26,0) 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.hero h1 {
    font-size: 5rem;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.3rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

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

/* Naše Výhoda */
.feature-box {
    padding: 4rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-box h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.feature-box p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.portfolio-card {
    overflow: hidden;
    transition: var(--transition);
}

.portfolio-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.portfolio-img {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.portfolio-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.portfolio-card:hover .portfolio-img img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 15, 26, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info {
    padding: 1.5rem;
}

.portfolio-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    color: var(--color-text-muted);
}

/* Ceník */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.pricing-card {
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: var(--transition);
}

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

.pricing-card.popular {
    border-color: var(--color-primary);
    box-shadow: 0 0 30px rgba(0, 210, 255, 0.1);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-tag {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-bg-dark);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 0.85rem;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 2rem;
}

.badge {
    display: inline-block;
    background: rgba(0, 210, 255, 0.1);
    color: var(--color-primary);
    padding: 5px 12px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.pricing-header h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.pricing-header .price {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 1rem;
}

.ideal-for {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.pricing-features {
    list-style: none;
    flex-grow: 1;
    margin-bottom: 2rem;
}

.pricing-features li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
    color: var(--color-text-muted);
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Doplňky */
.addons-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.addon-card {
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.addon-info h4 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.addon-info p {
    color: var(--color-text-muted);
}

.addon-action {
    text-align: right;
    min-width: 200px;
}

.addon-action .price {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.addon-action .price span {
    font-size: 1rem;
    color: var(--color-text-muted);
}

/* Cart Sidebar */
.cart-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    z-index: 1999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.cart-overlay.active {
    opacity: 1;
    visibility: visible;
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: -450px;
    width: 100%;
    max-width: 450px;
    height: 100vh;
    background: var(--color-bg-dark);
    border-left: 1px solid var(--color-border);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0,0,0,0.5);
}

.cart-sidebar.open {
    right: 0;
}

.cart-header {
    padding: 2rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.cart-body {
    flex-grow: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cart-item {
    background: var(--color-bg-panel);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-item-info h5 {
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
}

.cart-item-info p {
    color: var(--color-primary);
    font-weight: bold;
}

.cart-item-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.remove-item {
    background: rgba(255,0,0,0.1);
    color: #ff4444;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.remove-item:hover {
    background: #ff4444;
    color: white;
}

.cart-footer {
    padding: 2rem;
    border-top: 1px solid var(--color-border);
    background: rgba(10, 15, 26, 0.95);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.tax-info {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    width: 90%;
    max-width: 500px;
    padding: 2rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

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

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-text-muted);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    border-radius: 8px;
    font-family: var(--font-body);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Footer */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--color-border);
    margin-top: 4rem;
}

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

.footer-brand h2 {
    color: var(--color-primary);
    font-size: 2rem;
}

.footer-text {
    text-align: right;
    color: var(--color-text-muted);
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }
.delay-4 { transition-delay: 0.8s; }

/* Responsive */
@media (max-width: 992px) {
    .hero h1 { font-size: 4rem; }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-card.popular { transform: scale(1); }
    .pricing-card.popular:hover { transform: translateY(-10px); }
    .addon-card { flex-direction: column; text-align: center; gap: 1.5rem; }
    .addon-action { text-align: center; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-toggle { display: flex; }
    .hero h1 { font-size: 3rem; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; text-align: center; gap: 2rem; }
    .footer-text { text-align: center; }
}