/* ============================================
   OPTA DESIGN SYSTEM - optamize.biz
   ============================================ */

/* CSS Variables */
:root {
    /* The Void (Backgrounds) - OLED Optimized */
    --void: #09090b;
    --surface: #18181b;
    --elevated: #27272a;
    --border: #3f3f46;

    /* Text */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #52525b;

    /* Brand - Electric Violet */
    --primary: #8b5cf6;
    --primary-glow: #a855f7;
    --primary-dim: #6d28d9;

    /* Functional */
    --neon-green: #22c55e;
    --neon-amber: #f59e0b;
    --neon-cyan: #06b6d4;
    --neon-red: #ef4444;

    /* Glass */
    --glass-bg: rgba(24, 24, 27, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.05);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Animation */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Sizes */
    --nav-height: 64px;
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--void);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Noise Texture Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.025;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    z-index: 10000;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
}

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

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(9, 9, 11, 0.8);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-ring {
    width: 28px;
    height: 28px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    position: relative;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
    transition: all 0.3s var(--ease-out);
}

.nav-ring::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 1px solid rgba(139, 92, 246, 0.5);
    border-radius: 50%;
}

.nav-logo:hover .nav-ring {
    box-shadow: 0 0 25px rgba(139, 92, 246, 0.6);
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-command {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: all 0.2s var(--ease-out);
}

.nav-command svg {
    width: 16px;
    height: 16px;
}

.nav-command kbd {
    padding: 2px 6px;
    background: var(--elevated);
    border-radius: 4px;
    font-size: 0.75rem;
    font-family: inherit;
}

.nav-command:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

/* ============================================
   COMMAND PALETTE
   ============================================ */

.command-palette-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s var(--ease-out);
}

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

.command-palette {
    width: 100%;
    max-width: 600px;
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 60px rgba(139, 92, 246, 0.1);
    transform: translateY(-20px) scale(0.95);
    transition: transform 0.3s var(--ease-spring);
}

.command-palette-overlay.active .command-palette {
    transform: translateY(0) scale(1);
}

.command-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
}

.command-icon {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.command-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    font-size: 1rem;
    color: var(--text-primary);
}

.command-input::placeholder {
    color: var(--text-muted);
}

.command-hint {
    padding: 4px 8px;
    background: var(--elevated);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.command-results {
    max-height: 400px;
    overflow-y: auto;
}

.command-group {
    padding: var(--space-md);
}

.command-group:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

.command-group-title {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.command-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.command-item:hover,
.command-item.selected {
    background: var(--elevated);
}

.command-item-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--primary);
    color: white;
}

.command-item-icon svg {
    width: 16px;
    height: 16px;
}

.command-item-text {
    flex: 1;
}

.command-item-title {
    font-size: 0.875rem;
    font-weight: 500;
}

.command-item-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.command-item-badge {
    padding: 2px 8px;
    background: var(--surface);
    border-radius: 4px;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--nav-height) var(--space-lg) var(--space-2xl);
    overflow: hidden;
}

/* Fog Effect */
.hero-fog {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(139, 92, 246, 0.08), transparent 70%);
    animation: fogBreath 6s ease-in-out infinite;
}

@keyframes fogBreath {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* Particles (placeholder - JS will enhance) */
.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 10;
}

/* Hero Ring */
.hero-ring-container {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto var(--space-2xl);
}

.hero-ring {
    position: absolute;
    inset: 0;
    border: 3px solid var(--primary);
    border-radius: 50%;
    box-shadow:
        0 0 40px rgba(139, 92, 246, 0.4),
        0 0 80px rgba(139, 92, 246, 0.2),
        inset 0 0 30px rgba(139, 92, 246, 0.1);
    animation: ringPulse 4s ease-in-out infinite;
}

@keyframes ringPulse {
    0%, 100% {
        box-shadow:
            0 0 40px rgba(139, 92, 246, 0.4),
            0 0 80px rgba(139, 92, 246, 0.2),
            inset 0 0 30px rgba(139, 92, 246, 0.1);
    }
    50% {
        box-shadow:
            0 0 60px rgba(139, 92, 246, 0.6),
            0 0 100px rgba(139, 92, 246, 0.3),
            inset 0 0 40px rgba(139, 92, 246, 0.2);
    }
}

.ring-inner {
    position: absolute;
    inset: 20px;
    border: 2px solid rgba(139, 92, 246, 0.4);
    border-radius: 50%;
}

.ring-glow {
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.ring-plasma {
    position: absolute;
    inset: 40px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, rgba(139, 92, 246, 0.3), transparent, rgba(168, 85, 247, 0.3), transparent);
    animation: plasmaRotate 8s linear infinite;
}

@keyframes plasmaRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Satellites */
.satellites {
    position: absolute;
    inset: -40px;
}

.satellite {
    position: absolute;
    width: 60px;
    height: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    top: 50%;
    left: 50%;
    transform:
        rotate(var(--angle))
        translateX(180px)
        rotate(calc(-1 * var(--angle)));
    transition: all 0.3s var(--ease-spring);
}

.satellite:hover {
    transform:
        rotate(var(--angle))
        translateX(190px)
        rotate(calc(-1 * var(--angle)))
        scale(1.1);
}

.satellite-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--primary);
    transition: all 0.3s var(--ease-out);
}

.satellite-icon svg {
    width: 22px;
    height: 22px;
}

.satellite:hover .satellite-icon {
    background: var(--primary);
    color: white;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.satellite-label {
    font-size: 0.7rem;
    font-weight: 500;
    margin-top: 4px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.satellite:hover .satellite-label {
    color: var(--text-primary);
}

.satellite-soon .satellite-icon {
    border-style: dashed;
    color: var(--text-muted);
}

.satellite-soon:hover .satellite-icon {
    background: var(--elevated);
    color: var(--text-secondary);
    box-shadow: none;
}

/* Hero Text */
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.hero-title-gradient {
    background: linear-gradient(135deg, #fafafa 0%, var(--primary) 50%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
}

/* CTA Buttons */
.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all 0.2s var(--ease-out);
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    background: var(--primary-glow);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

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

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

.btn-secondary kbd {
    padding: 2px 6px;
    background: var(--elevated);
    border-radius: 4px;
    font-size: 0.8rem;
    margin-right: 4px;
}

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

.btn-ghost:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.btn-small {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
}

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

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

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.5; }
}

/* ============================================
   APPS SECTION
   ============================================ */

.apps {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

/* App Card */
.app-card {
    position: relative;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s var(--ease-out);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
}

.app-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(139, 92, 246, 0.1);
}

.app-card-glow {
    position: absolute;
    inset: 0;
    opacity: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(139, 92, 246, 0.15), transparent 70%);
    transition: opacity 0.4s;
    pointer-events: none;
}

.app-card:hover .app-card-glow {
    opacity: 1;
}

.app-card-content {
    position: relative;
    padding: var(--space-lg);
}

.app-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.app-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    color: white;
}

.app-icon svg {
    width: 28px;
    height: 28px;
}

.app-icon-macos {
    background: linear-gradient(135deg, var(--primary), #6366f1);
}

.app-icon-scan {
    background: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
}

.app-icon-lm {
    background: linear-gradient(135deg, var(--neon-amber), #f97316);
}

.app-icon-soon {
    background: var(--elevated);
    border: 2px dashed var(--border);
    color: var(--text-muted);
}

.app-badges {
    display: flex;
    gap: var(--space-xs);
}

.badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-platform {
    background: var(--surface);
    color: var(--text-secondary);
}

.badge-platform-multi {
    background: linear-gradient(135deg, var(--primary), var(--neon-cyan));
    color: white;
}

.badge-status {
    background: rgba(139, 92, 246, 0.15);
    color: var(--primary);
}

.badge-shipped {
    background: rgba(34, 197, 94, 0.15);
    color: var(--neon-green);
}

.badge-dev {
    background: rgba(245, 158, 11, 0.15);
    color: var(--neon-amber);
}

.badge-soon {
    background: var(--elevated);
    color: var(--text-muted);
}

.app-title {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.app-tagline {
    font-size: 0.875rem;
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.app-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.app-features {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.app-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.app-features svg {
    width: 16px;
    height: 16px;
    color: var(--neon-green);
    flex-shrink: 0;
}

.app-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Coming Soon Card */
.app-card-soon .app-card-content {
    opacity: 0.8;
}

.coming-soon-ideas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.idea-tag {
    padding: 6px 12px;
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.02), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-lg);
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s var(--ease-out);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 14px;
    color: var(--primary);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   NEWSLETTER SECTION
   ============================================ */

.newsletter {
    padding: var(--space-3xl) 0;
}

.newsletter-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.newsletter-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.newsletter-content p {
    color: var(--text-secondary);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-form input {
    padding: var(--space-md) var(--space-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.9375rem;
    min-width: 260px;
    outline: none;
    transition: border-color 0.2s;
}

.newsletter-form input:focus {
    border-color: var(--primary);
}

.newsletter-form input::placeholder {
    color: var(--text-muted);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: var(--space-sm);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.25rem;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-links a {
    display: block;
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
}

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

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    .nav-links {
        display: none;
    }

    .nav-command span {
        display: none;
    }

    .hero-ring-container {
        width: 220px;
        height: 220px;
    }

    .satellite {
        width: 50px;
        height: 50px;
        transform:
            rotate(var(--angle))
            translateX(140px)
            rotate(calc(-1 * var(--angle)));
    }

    .satellite-icon {
        width: 38px;
        height: 38px;
    }

    .satellite-label {
        display: none;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-scroll {
        display: none;
    }

    .newsletter-card {
        flex-direction: column;
        text-align: center;
    }

    .newsletter-form {
        flex-direction: column;
        width: 100%;
    }

    .newsletter-form input {
        min-width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .footer-brand {
        grid-column: span 2;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .apps-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }
}

/* ============================================
   UTILITIES
   ============================================ */

.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;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}