/* Critical CSS with Platform Optimizations */

/* CSS Custom Properties for Platform-Specific Optimizations */
:root {
    --animation-duration: 0.3s;
    --animation-easing: cubic-bezier(0.4, 0, 0.2, 1);
    --touch-target-size: 44px;
    --font-family-system: 'SF Pro Display';
    --background-main: radial-gradient(ellipse at center, #0a0e13 0%, #050709 40%, #020305 100%);
    --color-primary: #667eea;
    --color-text: #ffffff;
    --border-radius: 8px;
    --spacing-unit: 1rem;
}

/* Platform-specific overrides */
.platform-ios {
    --touch-target-size: 44px;
    --border-radius: 12px;
}

.platform-android {
    --touch-target-size: 48px;
    --border-radius: 4px;
}

.platform-windows {
    --animation-duration: 0.2s;
    --border-radius: 2px;
}

.device-mobile {
    --font-size-hero: 2.2rem;
    --spacing-unit: 0.75rem;
}

.device-tablet {
    --font-size-hero: 2.7rem;
    --spacing-unit: 0.875rem;
}

.device-desktop {
    --font-size-hero: 3.2rem;
    --spacing-unit: 1rem;
}

/* Reduced motion support */
.reduced-motion,
.reduced-motion * {
    --animation-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
}

/* Critical base styles */
* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family-system);
    background: var(--background-main) !important;
    background-attachment: fixed !important;
    color: var(--color-text);
    overflow-x: hidden;
    width: 100%;
    min-height: 100vh;
    position: relative;
}

/* Platform-specific body optimizations */
.platform-ios body {
    -webkit-overflow-scrolling: touch;
    -webkit-user-select: none;
    user-select: none;
}

.platform-android body {
    overscroll-behavior: contain;
}

.touch-device body {
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

/* Critical header styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-unit) 0;
    background: transparent;
    opacity: 0;
    animation: fadeInHeader var(--animation-duration) var(--animation-easing) 0.1s forwards;
}

.navbar {
    background: linear-gradient(135deg, rgba(30, 34, 40, 0.95) 0%, rgba(14, 17, 22, 0.95) 50%, rgba(10, 12, 16, 0.95) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(39, 42, 48, 0.8);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    margin: 0 auto;
    max-width: 1200px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    will-change: backdrop-filter;
}

/* Critical navigation styles */
.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--touch-target-size);
}

.logo-text {
    font-size: clamp(20px, 4vw, 32px);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 25%, #8B5CF6 75%, #7C3AED 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Critical hero section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px var(--spacing-unit) var(--spacing-unit);
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    opacity: 1;
    animation: none;
}

.hero-title {
    font-size: var(--font-size-hero, 3.5rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--color-text) !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: unset !important;
    background-clip: unset !important;
    letter-spacing: -0.02em;
    animation: none !important;
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: #a1a1aa;
    margin-bottom: calc(var(--spacing-unit) * 2.5);
    line-height: 1.6;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Critical button styles */
.btn-primary {
    background: linear-gradient(135deg, #7C3AED, #A855F7);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
    padding: 14px 28px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--animation-duration) var(--animation-easing);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: var(--touch-target-size);
    min-width: var(--touch-target-size);
}

/* Touch device optimizations */
.touch-device .btn-primary {
    min-height: var(--touch-target-size);
    padding: 16px 32px;
}

/* Loading and animation styles */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Critical animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInHeader {
    from { 
        opacity: 0; 
        transform: translateY(-20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes fadeInHero {
    from { 
        opacity: 0; 
        transform: translateY(40px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

/* PWA mode optimizations */
.pwa-mode .header {
    padding-top: env(safe-area-inset-top, var(--spacing-unit));
}

.pwa-mode .hero {
    padding-top: calc(env(safe-area-inset-top, 0px) + 80px + var(--spacing-unit));
}

/* High DPI optimizations */
.high-dpi {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Mobile-specific critical styles */
@media (max-width: 768px) {
    .hero {
        padding: calc(80px + var(--spacing-unit)) calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .navbar {
        margin: 0 calc(var(--spacing-unit) * 0.75);
        padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
    }
}

/* Container critical styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
    width: 100%;
}

/* Grid pattern background (critical) */
.grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: -1;
    opacity: 0.3;
    background-image:
        linear-gradient(rgba(139, 92, 246, 0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.4) 1px, transparent 1px);
    background-size: 70px 70px;
    filter: blur(0.5px);
}