/* --- Base Resets --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

html {
    max-width: 100%;
    width: 100%;
}

body {
    max-width: 100%;
    overflow-x: clip; /* clip instead of hidden - doesn't break position:sticky */
    width: 100%;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- Background Grid & Light Aura --- */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 1;
    pointer-events: none;
}

.interactive-glow {
    position: fixed;
    width: 800px;
    height: 800px;
    background: radial-gradient(
        circle, 
        var(--ambient-glow) 0%, 
        transparent 70%
    );
    border-radius: 50%;
    transform: translate3d(50vw, 50vh, 0) translate(-50%, -50%);
    left: 0;
    top: 0;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}

body::before {
    content: '';
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--ambient-glow) 0%, transparent 85%);
    z-index: 0;
    pointer-events: none;
    animation: ambientPulse 12s ease-in-out infinite alternate;
}

@keyframes ambientPulse {
    0% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.7; }
    100% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

/* --- Layout Wrapper --- */
.main-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ==========================================================================
   Premium Scroll Reveal Animation System
   ========================================================================== */

/* --- Base Reveal (default: cinematic rise + fade) --- */
.reveal {
    opacity: 0;
    transform: translateY(60px) scale(0.97);
    filter: blur(6px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform, filter;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0) translateX(0) scale(1) rotate(0deg) skewX(0deg);
    filter: blur(0);
}

/* --- Variant: Slide from Left --- */
.reveal.reveal-left {
    transform: translateX(-80px) rotate(-2deg);
    filter: blur(4px);
}

/* --- Variant: Slide from Right --- */
.reveal.reveal-right {
    transform: translateX(80px) rotate(2deg);
    filter: blur(4px);
}

/* --- Variant: Scale + Blur Pop --- */
.reveal.reveal-pop {
    transform: scale(0.8);
    filter: blur(12px);
}

/* --- Variant: Clip Reveal (wipe-in from bottom) --- */
.reveal.reveal-clip {
    transform: none;
    filter: none;
    clip-path: inset(100% 0 0 0);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                clip-path 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.reveal-clip.active {
    clip-path: inset(0 0 0 0);
}

/* --- Variant: Flip In (3D perspective) --- */
.reveal.reveal-flip {
    transform: perspective(1000px) rotateX(25deg) translateY(40px);
    transform-origin: bottom center;
    filter: blur(3px);
}

/* --- Variant: Skew Entrance (cyberpunk style) --- */
.reveal.reveal-skew {
    transform: skewY(4deg) translateY(50px);
    filter: blur(4px);
}

/* --- Variant: Scale Up from Zero --- */
.reveal.reveal-scale {
    transform: scale(0.6);
    filter: blur(8px);
}

/* --- Staggered Children (progressive cascade) --- */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
    filter: blur(4px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.active > * {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
}

.reveal-stagger > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger > *:nth-child(3) { transition-delay: 0.24s; }
.reveal-stagger > *:nth-child(4) { transition-delay: 0.36s; }
.reveal-stagger > *:nth-child(5) { transition-delay: 0.48s; }
.reveal-stagger > *:nth-child(6) { transition-delay: 0.6s; }
.reveal-stagger > *:nth-child(7) { transition-delay: 0.72s; }
.reveal-stagger > *:nth-child(8) { transition-delay: 0.84s; }

/* --- Speed modifiers --- */
.reveal.reveal-fast {
    transition-duration: 0.5s;
}

.reveal.reveal-slow {
    transition-duration: 1.3s;
}

/* --- Delay modifiers --- */
.reveal.delay-100 { transition-delay: 0.1s; }
.reveal.delay-200 { transition-delay: 0.2s; }
.reveal.delay-300 { transition-delay: 0.3s; }
.reveal.delay-400 { transition-delay: 0.4s; }

/* --- Reduce motion for accessibility --- */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-stagger > * {
        opacity: 1;
        transform: none;
        filter: none;
        clip-path: none;
        transition: none;
    }
}