/* =========================================
   EngineX1 Website Styles
   ========================================= */

/* CSS Variables */
:root {
    /* Colors */
    --color-bg-dark: #0a1628;
    --color-bg-medium: #0f2341;
    --color-bg-light: #162d50;
    --color-primary: #0088ff;
    --color-primary-light: #40a9ff;
    --color-primary-dark: #0066cc;
    --color-accent: #00d4ff;
    --color-text: #ffffff;
    --color-text-muted: #8fa3bf;
    --color-text-dim: #5a7194;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    
    /* Typography */
    --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

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

/* Selection */
::selection {
    background: var(--color-primary);
    color: white;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* =========================================
   Navigation
   ========================================= */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-sm) var(--space-lg);
}

.nav-logo {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-engine {
    color: var(--color-text);
}

.logo-x1 {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* =========================================
   Hero Section
   ========================================= */

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

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 136, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 136, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 136, 255, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title-line {
    display: block;
}

.hero-title-line.accent {
    color: var(--color-primary);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.hero-subtitle strong {
    color: var(--color-accent);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-dim);
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

/* Device Tags */
.device-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.device-tag {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    background: rgba(0, 136, 255, 0.1);
    border: 1px solid rgba(0, 136, 255, 0.3);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.device-tag:hover {
    background: rgba(0, 136, 255, 0.2);
    border-color: var(--color-primary);
    color: var(--color-text);
}

.device-tag-more {
    background: transparent;
    border-style: dashed;
    color: var(--color-text-dim);
    font-weight: 700;
    letter-spacing: 2px;
}

.device-tag-more:hover {
    background: transparent;
    border-color: var(--color-text-dim);
    color: var(--color-text-muted);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text);
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 136, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* Scroll Indicator */
.hero-scroll {
    display: none;
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-dim);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

/* =========================================
   Sections Common Styles
   ========================================= */

.section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    text-align: center;
}

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

.section-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
}

/* =========================================
   Problem Section
   ========================================= */

.problem {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.problem-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition-base);
}

.problem-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.problem-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.problem-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* =========================================
   Solution Section
   ========================================= */

.solution {
    background: var(--color-bg-medium);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.solution-card {
    position: relative;
    padding: var(--space-xl);
    background: linear-gradient(135deg, rgba(0, 136, 255, 0.05) 0%, transparent 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.solution-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
}

.solution-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
}

.solution-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Solution Highlight */
.solution-highlight {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    background: rgba(0, 136, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.highlight-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--color-accent);
}

.highlight-content p {
    color: var(--color-text-muted);
    line-height: 1.8;
}

.highlight-content em {
    color: var(--color-text-dim);
}

.highlight-content strong {
    color: var(--color-text);
}

/* Timeline Demo */
.timeline-demo {
    position: relative;
    height: 120px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.timeline-track {
    position: relative;
    height: 60px;
    background: linear-gradient(90deg, 
        var(--color-primary) 0%, 
        var(--color-primary) 25%, 
        var(--color-accent) 25%, 
        var(--color-accent) 50%,
        var(--color-primary-light) 50%,
        var(--color-primary-light) 75%,
        var(--color-primary-dark) 75%
    );
    border-radius: var(--radius-sm);
    opacity: 0.6;
}

.timeline-item {
    position: absolute;
    top: -24px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.timeline-playhead {
    position: absolute;
    top: var(--space-md);
    bottom: var(--space-md);
    left: 20%;
    width: 3px;
    background: var(--color-text);
    border-radius: 2px;
    animation: playhead-move 4s ease-in-out infinite;
}

@keyframes playhead-move {
    0%, 100% { left: 10%; }
    50% { left: 85%; }
}

/* =========================================
   Format Section
   ========================================= */

.format {
    background: linear-gradient(180deg, var(--color-bg-medium) 0%, var(--color-bg-dark) 100%);
}

.format-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.pillar {
    text-align: center;
    padding: var(--space-xl);
}

.pillar-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    color: var(--color-primary);
}

.pillar h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

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

/* Code Preview */
.code-preview {
    background: #0d1117;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--color-border);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-text-dim);
}

.code-dot:nth-child(1) { background: #ff5f56; }
.code-dot:nth-child(2) { background: #ffbd2e; }
.code-dot:nth-child(3) { background: #27ca40; }

.code-filename {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.code-content {
    padding: var(--space-lg);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.7;
}

.code-content code {
    color: var(--color-text);
}

.code-comment { color: #6a737d; }
.code-key { color: #79c0ff; }
.code-string { color: #a5d6ff; }
.code-number { color: #56d4dd; }

/* =========================================
   AI Section
   ========================================= */

.ai {
    background: var(--color-bg-dark);
}

.workflow {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.workflow-step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    max-width: 200px;
}

.step-number {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-text);
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.workflow-arrow {
    color: var(--color-text-dim);
    font-size: 1.5rem;
    margin-top: 8px;
}

/* AI Safety */
.ai-safety {
    display: flex;
    gap: var(--space-xl);
    background: rgba(0, 136, 255, 0.05);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.safety-badge {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    color: var(--color-primary);
}

.safety-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.safety-content h4 {
    font-size: 1.1rem;
    color: var(--color-accent);
    margin: var(--space-md) 0 var(--space-sm);
}

.safety-content p {
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--space-sm);
}

.safety-content strong {
    color: var(--color-text);
}

.safety-emphasis {
    color: var(--color-text) !important;
    font-weight: 500;
    padding: var(--space-md);
    background: rgba(0, 136, 255, 0.1);
    border-radius: var(--radius-md);
    margin-top: var(--space-md) !important;
}

/* =========================================
   Development Section
   ========================================= */

.development {
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
}

.dev-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.dev-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
}

.dev-status {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(0, 212, 255, 0.1);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

.dev-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.dev-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Dev Notice */
.dev-notice {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    padding: var(--space-xl);
    background: rgba(0, 136, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.dev-notice p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 0;
}

.dev-notice p + p {
    margin-top: var(--space-md);
}

.dev-notice a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.dev-notice a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

/* =========================================
   Use Cases Section
   ========================================= */

.usecases {
    background: var(--color-bg-medium);
}

.usecase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.usecase-card {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.usecase-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.usecase-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    color: var(--color-primary);
}

.usecase-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--space-sm);
}

.usecase-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* =========================================
   Team Section
   ========================================= */

.team {
    background: linear-gradient(180deg, var(--color-bg-medium) 0%, var(--color-bg-dark) 100%);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
    max-width: 900px;
    margin: 0 auto;
}

.team-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
}

.team-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
}

.team-card h3 {
    font-size: 1.3rem;
    margin-bottom: var(--space-xs);
}

.team-card h3 a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-fast);
}

.team-card h3 a:hover {
    color: var(--color-primary);
}

.team-role {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.team-bio {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-md);
    text-align: left;
}

.team-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    padding: var(--space-sm) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.team-contact a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.team-contact a:hover {
    color: var(--color-primary);
}

.team-links {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.team-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-family: var(--font-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.team-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.team-link svg {
    width: 18px;
    height: 18px;
}

.team-link.linkedin:hover {
    background: #0077b5;
    border-color: #0077b5;
    color: white;
}

/* =========================================
   Contact Section
   ========================================= */

.contact {
    background: var(--color-bg-dark);
}

/* Mirka - celá šířka */
.contact-person-full {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.contact-person-full .contact-avatar {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
}

.contact-person-info h3 {
    font-size: 1.3rem;
    margin-bottom: var(--space-xs);
}

.contact-person-info > p {
    color: var(--color-primary);
    font-size: 0.95rem;
    margin-bottom: var(--space-sm);
}

.contact-person-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

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

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

.contact-separator {
    color: var(--color-text-dim);
}

/* 3 firmy grid */
.contact-companies {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.company-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    transition: var(--transition-base);
}

.company-card:hover {
    border-color: var(--color-primary);
}

.company-card h3 {
    font-size: 1.15rem;
    margin-bottom: var(--space-xs);
}

.company-tagline {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--space-md);
    min-height: 2.5em;
}

.company-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.company-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.company-links a:hover {
    color: var(--color-primary);
    background: rgba(0, 136, 255, 0.1);
}

.company-links svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* =========================================
   Language Switcher
   ========================================= */

.lang-switcher {
    position: fixed;
    top: 80px;
    left: var(--space-lg);
    z-index: 999;
    display: flex;
    align-items: center;
    background: rgba(10, 22, 40, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.85rem;
    font-weight: 500;
}

.lang-switcher a,
.lang-switcher span {
    padding: var(--space-xs) var(--space-sm);
    text-decoration: none;
    transition: var(--transition-fast);
}

.lang-switcher a {
    color: var(--color-text-muted);
}

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

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

.lang-divider {
    color: var(--color-text-dim);
    user-select: none;
}

@media (max-width: 768px) {
    .lang-switcher {
        top: 70px;
        left: var(--space-md);
    }
}

/* =========================================
   Footer
   ========================================= */

.footer {
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
    padding: var(--space-xl) 0;
}

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

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.footer-company {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.footer-copyright {
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

/* =========================================
   Modal
   ========================================= */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-bg-medium);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 400px;
    width: 100%;
    text-align: center;
    position: relative;
    animation: modal-appear 0.3s ease;
}

@keyframes modal-appear {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-fast);
}

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

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.modal-content p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

#qr-code {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-lg);
    background: white;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

#download-vcard {
    width: 100%;
}

/* =========================================
   Responsive Design
   ========================================= */

@media (max-width: 1024px) {
    .solution-highlight {
        grid-template-columns: 1fr;
    }
    
    .timeline-demo {
        display: none;
    }
    
    .usecase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --space-3xl: 5rem;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 22, 40, 0.98);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-scroll {
        display: none;
    }
    
    .device-tags {
        gap: 0.4rem;
    }
    
    .device-tag {
        padding: 0.3rem 0.7rem;
        font-size: 0.8rem;
    }
    
    .workflow {
        flex-direction: column;
        align-items: center;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .workflow-step {
        max-width: 100%;
        width: 100%;
    }
    
    .ai-safety {
        flex-direction: column;
        text-align: center;
    }
    
    .safety-badge {
        margin: 0 auto;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-companies {
        grid-template-columns: 1fr;
    }
    
    .contact-person-full {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-person-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .problem-grid,
    .solution-grid,
    .format-pillars,
    .dev-features,
    .usecase-grid {
        grid-template-columns: 1fr;
    }
    
    .team-links {
        flex-direction: column;
    }
    
    .team-link {
        width: 100%;
        justify-content: center;
    }
}

/* =========================================
   Animations
   ========================================= */

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

.hero-content {
    animation: fadeInUp 1s ease-out;
}

/* Intersection Observer animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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