/**
 * Browser Fallbacks for Older Browsers
 * Add this CSS AFTER main styles but BEFORE responsive styles
 */

/* 1. CSS Variables Fallback for IE11 */
:root {
    --primary-grey: #e5e7eb;
    --primary-orange: #f97316;
    --primary-purple: #7c3aed;
    --secondary-amber: #fbbf24;
    --dark-bg: #1a0b2e;
    --darker-bg: #0f051a;
    --card-bg: rgba(229, 231, 235, 0.03);
    --border-color: rgba(229, 231, 235, 0.2);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --primary-cyan: #00ffff;
    --primary-pink: #ff00ff;
}

/* Fallback colors for browsers that don't support CSS variables */
.no-cssvars .hero {
    background: #0f051a;
    color: #ffffff;
}

.no-cssvars .btn-primary {
    background: #00ffff;
    color: #0f051a;
}

.no-cssvars .card {
    background: rgba(229, 231, 235, 0.03);
    border: 1px solid rgba(229, 231, 235, 0.2);
}

/* 2. Backdrop-filter fallback for older browsers */
.backdrop-filter-blur {
    background-color: rgba(0, 0, 0, 0.8);
}

@supports (backdrop-filter: blur(10px)) {
    .backdrop-filter-blur {
        background-color: rgba(0, 0, 0, 0.3);
        backdrop-filter: blur(10px);
    }
}

/* 3. CSS Grid fallback for IE11 */
.grid-fallback {
    display: block;
}

.grid-fallback .grid-item {
    display: inline-block;
    vertical-align: top;
    width: 300px;
    margin: 10px;
}

@supports (display: grid) {
    .grid-fallback {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }
    
    .grid-fallback .grid-item {
        display: block;
        width: auto;
        margin: 0;
    }
}

/* 4. Gap property fallback for older browsers */
.gap-fallback {
    margin: -10px;
}

.gap-fallback > * {
    margin: 10px;
}

@supports (gap: 20px) {
    .gap-fallback {
        margin: 0;
        gap: 20px;
    }
    
    .gap-fallback > * {
        margin: 0;
    }
}

/* 5. Clamp function fallback for older browsers */
.clamp-fallback {
    font-size: 3rem;
}

/* Larger screens */
@media (min-width: 768px) {
    .clamp-fallback {
        font-size: 4.5rem;
    }
}

@media (min-width: 1200px) {
    .clamp-fallback {
        font-size: 6rem;
    }
}

@supports (font-size: clamp(3rem, 8vw, 6rem)) {
    .clamp-fallback {
        font-size: clamp(3rem, 8vw, 6rem);
    }
}

/* 6. Transform and animation fallbacks */
.transform-fallback {
    /* No transform for browsers that don't support it */
}

@supports (transform: translateY(100px)) {
    .transform-fallback {
        transform: translateY(100px);
        transition: transform 0.3s ease;
    }
}

/* 7. Flexbox fallback for very old browsers */
.flex-fallback {
    display: block;
}

.flex-fallback .flex-item {
    display: inline-block;
    vertical-align: top;
}

@supports (display: flex) {
    .flex-fallback {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .flex-fallback .flex-item {
        display: block;
    }
}

/* 8. Position sticky fallback */
.sticky-fallback {
    position: relative;
}

@supports (position: sticky) {
    .sticky-fallback {
        position: sticky;
        top: 0;
        z-index: 100;
    }
}

/* 9. Custom properties fallback for animations */
@keyframes glowFallback {
    0% { box-shadow: 0 0 5px #00ffff; }
    50% { box-shadow: 0 0 20px #00ffff, 0 0 30px #00ffff; }
    100% { box-shadow: 0 0 5px #00ffff; }
}

.glow-effect {
    animation: glowFallback 2s ease-in-out infinite;
}

/* 10. Scroll behavior fallback */
.scroll-smooth-fallback {
    /* Fallback - no smooth scroll */
}

@supports (scroll-behavior: smooth) {
    .scroll-smooth-fallback {
        scroll-behavior: smooth;
    }
}

/* 11. Object-fit fallback for images */
.object-fit-fallback {
    background-size: cover;
    background-position: center;
}

@supports (object-fit: cover) {
    .object-fit-fallback {
        object-fit: cover;
        background: none;
    }
}

/* 12. CSS calc() fallback */
.calc-fallback {
    width: 90%;
    margin-left: 5%;
    margin-right: 5%;
}

@supports (width: calc(100% - 40px)) {
    .calc-fallback {
        width: calc(100% - 40px);
        margin-left: 20px;
        margin-right: 20px;
    }
}

/* 13. Filter effects fallback */
.filter-blur-fallback {
    /* No blur effect for older browsers */
}

@supports (filter: blur(5px)) {
    .filter-blur-fallback {
        filter: blur(5px);
    }
}

/* 14. Box-shadow fallback for transparency */
.shadow-fallback {
    border: 1px solid #333;
}

@supports (box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1)) {
    .shadow-fallback {
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        border: none;
    }
}

/* 15. CSS feature detection for JavaScript */
.css-features-test {
    position: absolute;
    visibility: hidden;
}

.css-features-test::before {
    content: 'test';
}

/* JavaScript can check for CSS variable support */
.css-vars-test {
    color: var(--test-color, #000);
}

console.log('Browser fallbacks CSS loaded');