/* ================================
   MATECLUB LANDING PAGE
   Design minimaliste et élégant
   ================================ */

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

:root {
    /* Colors from MateClub app */
    --color-primary: #e94560;
    --color-primary-light: #ff6b6b;
    --color-bg: #1a1a2e;
    --color-bg-light: #2a2a4e;
    --color-bg-nav: #16213e;
    --color-text: #eee;
    --color-text-secondary: #ccc;
    --color-text-muted: #888;
    --color-border: #2a2a4e;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #e94560 0%, #ff6b6b 100%);
    --gradient-bg: radial-gradient(ellipse at top, #2a2a4e 0%, #1a1a2e 50%, #16213e 100%);
    
    /* Spacing - unified spacing scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --container-max: 1200px;
    --section-padding: 5rem;
    
    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-bg);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ================================
   HEADER CENTRÉ
   ================================ */
.main-header {
    padding: var(--space-md) 0 var(--space-sm);
    text-align: center;
    position: relative;
    z-index: 100;
}

.header-content {
    max-width: var(--container-max);
    margin: 0 auto;
}

.header-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-sm);
}

.header-logo-img {
    width: 400px;
    height: auto;
    border-radius: var(--radius-lg);
}

.header-tagline {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    font-style: italic;
}

/* ================================
   HERO SECTION
   ================================ */
.hero {
    padding: var(--space-md) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(233, 69, 96, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-content {
    max-width: 600px;
    text-align: center;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(233, 69, 96, 0.15);
    border: 1px solid rgba(233, 69, 96, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.btn-primary {
    padding: 0.875rem 1.75rem;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.3);
}

.btn-secondary {
    padding: 0.875rem 1.75rem;
    background: transparent;
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    transition: var(--transition-fast);
    cursor: pointer;
}

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

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* Hero Mockup Image */
.hero-visual {
    display: none;
    background: transparent;
    border: none;
}

.hero-mockup-img {
    max-width: 320px;
    width: 100%;
    height: auto;
    border: none;
    outline: none;
    background: transparent;
    /* Retiré border-radius et box-shadow pour éviter tout cadre */
}

/* ================================
   VIDEO SECTION
   ================================ */
.video-section {
    padding: var(--space-lg) 0;
    background: transparent;
}

.video-wrapper {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ================================
   SECTION STYLES
   ================================ */
.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto var(--space-md);
}

/* ================================
   CONCEPT SECTION
   ================================ */
.concept {
    padding: var(--section-padding) 0;
    background: rgba(22, 33, 62, 0.3);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.concept-card {
    background: var(--color-bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition-normal);
}

.concept-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.concept-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.concept-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.concept-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ================================
   FEATURES SECTION
   ================================ */
.features {
    padding: var(--section-padding) 0;
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.feature.reverse {
    direction: rtl;
}

.feature.reverse > * {
    direction: ltr;
}

.feature-badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: rgba(233, 69, 96, 0.15);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.feature-content h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.feature-content > p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.feature-points {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-points li {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.feature-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-card {
    width: 100%;
    max-width: 360px;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* Audio Player Visual */
.wave-animation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 80px;
    margin-bottom: 1.5rem;
}

.wave-animation span {
    width: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: wave 1s ease-in-out infinite;
}

.wave-animation span:nth-child(1) { height: 20%; animation-delay: 0s; }
.wave-animation span:nth-child(2) { height: 60%; animation-delay: 0.1s; }
.wave-animation span:nth-child(3) { height: 100%; animation-delay: 0.2s; }
.wave-animation span:nth-child(4) { height: 60%; animation-delay: 0.3s; }
.wave-animation span:nth-child(5) { height: 20%; animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { transform: scaleY(0.5); }
    50% { transform: scaleY(1); }
}

.player-bar {
    height: 4px;
    background: var(--color-bg-nav);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress {
    height: 100%;
    width: 60%;
    background: var(--color-primary);
    border-radius: 2px;
    animation: progress 3s ease-in-out infinite;
}

@keyframes progress {
    0% { width: 20%; }
    50% { width: 70%; }
    100% { width: 20%; }
}

.player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    font-size: 1.5rem;
}

.play-btn {
    font-size: 2rem;
}

/* Gallery Visual */
.visual-card.gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    padding: 1rem;
}

.gallery-item {
    aspect-ratio: 1;
    background: var(--color-bg-nav);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.gallery-item.main {
    grid-column: span 2;
    aspect-ratio: 2 / 1;
    background: var(--gradient-primary);
}

/* Gesture Visual */
.visual-card.gesture {
    padding: 3rem 2rem;
}

.gesture-area {
    display: flex;
    justify-content: center;
    align-items: center;
}

.swipe-indicator {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 1.5rem;
    color: var(--color-text-muted);
}

.hand {
    font-size: 3rem;
    animation: swipe 2s ease-in-out infinite;
}

@keyframes swipe {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-20px); }
    75% { transform: translateX(20px); }
}

/* Security Visual */
.visual-card.security {
    text-align: center;
    padding: 3rem 2rem;
}

.lock-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.security-badges span {
    padding: 0.4rem 0.8rem;
    background: var(--color-bg-nav);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* Hosting Visual */
.visual-card.hosting {
    text-align: center;
    padding: 2.5rem 2rem;
}

.server-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.data-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-text-secondary);
}

.data-flow span:nth-child(2),
.data-flow span:nth-child(4) {
    color: var(--color-primary);
    font-weight: bold;
}

.hosting-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: white;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ================================
   ADMIN SECTION
   ================================ */
.admin {
    padding: var(--section-padding) 0;
    background: rgba(22, 33, 62, 0.3);
}

.admin-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.admin-text h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.admin-text > p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.admin-features {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.admin-features li {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.admin-visual {
    display: flex;
    justify-content: center;
}

.admin-card {
    width: 100%;
    max-width: 340px;
    background: var(--color-bg-light);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.admin-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.admin-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
}

.admin-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-bg-nav);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.admin-info {
    flex: 1;
}

.admin-name {
    font-weight: 500;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge-admin {
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    background: var(--color-primary);
    color: white;
    border-radius: 4px;
    font-weight: 600;
}

.admin-meta {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* ================================
   CHECKLIST SECTION
   ================================ */
.checklist-section {
    padding: var(--section-padding) 0;
    background: rgba(22, 33, 62, 0.3);
}

.checklist-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.checklist-column {
    background: var(--color-bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.checklist-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    text-align: center;
}

.checklist-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.check-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.checklist-item.checked .check-icon {
    background: var(--color-primary);
    color: white;
}

.checklist-item:not(.checked) .check-icon {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    opacity: 0.5;
}

/* ================================
   TECH STACK SECTION
   ================================ */
.tech {
    padding: var(--section-padding) 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.tech-item {
    background: var(--color-bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition-normal);
}

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

.tech-logo {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.tech-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.tech-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.tech-item.vibe-item {
    background: var(--gradient-primary);
    border-color: var(--color-primary);
}

.tech-item.vibe-item .tech-name {
    color: white;
}

.tech-item.vibe-item .tech-desc {
    color: rgba(255, 255, 255, 0.85);
}

.tech-item.vibe-item .tech-desc .highlight {
    color: white;
    font-weight: 600;
}

.creator-note-section {
    padding: 2rem 0;
    background: transparent;
}

.creator-note-section.top-note {
    padding: 1rem 0;
}

.creator-note-section .creator-note {
    margin-top: 0;
}

.creator-note {
    text-align: center;
    margin-top: 3rem;
    padding: 1.5rem;
    background: rgba(233, 69, 96, 0.08);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(233, 69, 96, 0.2);
}

.creator-note p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

.creator-note strong {
    color: var(--color-text);
}

.techcafe-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
}

.techcafe-link:hover {
    border-bottom-color: var(--color-primary);
}

/* ================================
   DOWNLOAD SECTION
   ================================ */
.download {
    padding: var(--section-padding) 0;
    background: rgba(22, 33, 62, 0.3);
}

.download-card {
    background: var(--color-bg-light);
    border-radius: var(--radius-xl);
    padding: 4rem;
    border: 1px solid var(--color-border);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.download-content h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.download-content > p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.install-options {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.install-method {
    flex: 1;
    min-width: 220px;
    max-width: 280px;
    background: var(--color-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.install-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.install-method h4 {
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.install-method code {
    display: block;
    background: var(--color-bg-nav);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    word-break: break-all;
}

.install-method p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.install-divider {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--color-text);
    color: var(--color-bg);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-fast);
    margin-bottom: 2rem;
}

.btn-github:hover {
    background: white;
    transform: translateY(-2px);
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: rgba(233, 69, 96, 0.1);
    border-radius: 50px;
    font-size: 0.85rem;
}

.badge-label {
    color: var(--color-text-muted);
}

.badge-value {
    color: var(--color-primary);
    font-weight: 600;
}

.badge-status {
    background: var(--color-primary);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ================================
   FOOTER
   ================================ */
.footer {
    padding: 3rem 0;
    background: var(--color-bg-nav);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.footer-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

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

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-copy {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer-note {
    margin-top: 0.5rem;
    color: var(--color-primary);
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */
@media (min-width: 1024px) {
    .hero-wrapper {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: 8rem;
    }
    
    .hero-content {
        text-align: left;
        max-width: 600px;
        flex-shrink: 0;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-cta {
        justify-content: flex-start;
    }
    
    .hero-stats {
        justify-content: flex-start;
    }
    
    .hero-visual {
        display: block;
        flex-shrink: 0;
    }
}

@media (max-width: 1023px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .feature {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .feature.reverse {
        direction: ltr;
    }
    
    .admin-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .admin-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem;
        --space-md: 1.5rem;
    }
    
    .container {
        padding: 0 1.25rem;
    }
    
    .main-header {
        padding: var(--space-sm) 0;
    }
    
    .header-logo-img {
        width: 280px;
        height: auto;
    }
    
    .hero {
        padding: var(--space-sm) 0;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-divider {
        height: 30px;
    }
    
    .download-card {
        padding: 2rem;
    }
    
    .install-options {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .install-method {
        max-width: 100%;
        width: 100%;
    }
    
    .install-divider {
        display: none;
    }
    
    .concept-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .checklist-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* ================================
   UTILITY CLASSES
   ================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}