/* Bits Masters - Black Theme with Consistent Colors */

/* Base styles */
:root {
    --primary-blue: #3b82f6;
    --primary-blue-dark: #2563eb;
    --primary-blue-light: #60a5fa;
    --secondary-gray: #374151;
    --accent-gray: #6b7280;
    --light-gray: #9ca3af;
    --dark-bg: #000000;
    --card-bg: #111827;
    --border-color: #374151;
}

/* Critical CSS - Above the fold optimizations */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--dark-bg);
    color: white;
}

/* Navigation optimizations */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Hero section optimizations */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-attachment: fixed;
}

/* Service cards hover optimizations */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    will-change: transform, box-shadow;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Image optimizations for Core Web Vitals */
img {
    max-width: 100%;
    height: auto;
    loading: lazy;
}

/* Logo optimization */
.logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* Button optimizations */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    will-change: transform, box-shadow;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Form optimizations */
.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px; /* Prevents zoom on iOS */
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .hero-section {
        min-height: auto;
        padding: 120px 0 80px;
    }

    nav {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(0, 0, 0, 0.95);
    }

    .service-card:hover {
        transform: none;
    }
}

/* Print styles */
@media print {
    nav,
    .cta-section,
    .footer {
        display: none !important;
    }
}

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

/* Focus styles for accessibility */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        color: #fff;
        border: 2px solid #fff;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a202c;
        color: #e2e8f0;
    }

    .service-card {
        background-color: #2d3748;
        border-color: #4a5568;
    }
}