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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

/* Selection */
::selection {
    background: rgba(255, 107, 74, 0.3);
    color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #111827;
}
::-webkit-scrollbar-thumb {
    background: #374151;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #FF6B4A;
}

/* Hero Animations - above the fold, always visible by default */
.hero-anim {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

/* Scroll Reveal - progressive enhancement, only below fold */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* Staggered delays for grid items */
    .reveal:nth-child(1) { transition-delay: 0.05s; }
    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.15s; }
    .reveal:nth-child(4) { transition-delay: 0.2s; }
    .reveal:nth-child(5) { transition-delay: 0.25s; }
    .reveal:nth-child(6) { transition-delay: 0.3s; }
}

/* Navbar scroll state */
.navbar-scrolled {
    background: rgba(17, 24, 39, 0.95) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Form focus styles */
input:focus, textarea:focus {
    outline: none;
}

/* Image aspect ratios */
img {
    max-width: 100%;
    height: auto;
}

/* Smooth image loading */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 0;
}

img.loaded {
    opacity: 1;
}

/* Button hover lift */
button, a {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Link underline animation */
a:not(.no-underline) {
    background-image: linear-gradient(currentColor, currentColor);
    background-position: 0% 100%;
    background-repeat: no-repeat;
    background-size: 0% 1px;
    transition: background-size 0.3s ease, background-position 0.3s ease;
}

a:not(.no-underline):hover {
    background-size: 100% 1px;
    background-position: 100% 100%;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid #FF6B4A;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }
    
    nav, #contact-form, .animate-bounce {
        display: none;
    }
}