/* ===========================
   FROTEX - Scroll, Reveal & 3D Animations
   =========================== */

/* ===========================
   SCROLL PROGRESS BAR
   =========================== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--red);
    z-index: 10000;
    transition: width 0.1s linear;
    pointer-events: none;
}

/* ===========================
   REVEAL BASE — fade up
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal.delay-1 { transition-delay: 0.15s; }
.reveal.delay-2 { transition-delay: 0.3s; }
.reveal.delay-3 { transition-delay: 0.45s; }

/* ===========================
   3D DEPTH SECTIONS — rotate in from below
   =========================== */
.depth-section {
    transform: perspective(1200px) rotateX(3deg) translateY(60px);
    opacity: 0;
    transition: transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                opacity 0.8s ease;
    transform-origin: center bottom;
    will-change: transform, opacity;
}

.depth-section.depth-visible {
    transform: perspective(1200px) rotateX(0deg) translateY(0);
    opacity: 1;
}

/* ===========================
   HERO ANIMATIONS
   =========================== */
.anim-fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.hero-slide.active .anim-fade-up {
    opacity: 1;
    transform: translateY(0);
}

.anim-scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-slide.active .anim-scale-in {
    opacity: 1;
    transform: scale(1);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* ===========================
   PARALLAX LAYERS
   =========================== */
.hero-slide-bg,
.environment-bg {
    will-change: transform;
    transition: none !important;
}

/* ===========================
   3D TILT on cards
   =========================== */
.category-card,
.stat-card,
.highlight-card {
    transform-style: preserve-3d;
    transition: transform 0.4s cubic-bezier(0.03, 0.98, 0.52, 0.99),
                box-shadow 0.4s ease;
}

.category-card:hover,
.stat-card:hover,
.highlight-card:hover {
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

/* Inner content lifts in 3D space */
.category-card-content,
.highlight-content {
    transform: translateZ(30px);
    transform-style: preserve-3d;
}

.category-card-image img,
.highlight-image img {
    transform: translateZ(20px);
    transform-style: preserve-3d;
}

/* ===========================
   PARALLAX ELEMENT BASE
   =========================== */
.parallax-element {
    will-change: transform;
    transition: transform 0.1s linear;
}

/* ===========================
   STAGGER CHILDREN
   =========================== */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.15s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.25s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   HOVER LIFT
   =========================== */
.hover-lift {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

/* Image zoom on hover */
.img-zoom {
    overflow: hidden;
}

.img-zoom img {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.img-zoom:hover img {
    transform: scale(1.08);
}

/* ===========================
   TEXT GRADIENT ANIMATION
   =========================== */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.gradient-text {
    background: linear-gradient(135deg, var(--red), var(--red-light), var(--red));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 4s ease-in-out infinite;
}

/* ===========================
   GLOW PULSE
   =========================== */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(212, 26, 43, 0.2),
                    0 0 40px rgba(212, 26, 43, 0.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(212, 26, 43, 0.4),
                    0 0 60px rgba(212, 26, 43, 0.2);
    }
}

.glow-pulse {
    animation: glowPulse 3s ease-in-out infinite;
}

/* ===========================
   SLOW SPIN
   =========================== */
@keyframes slowSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.slow-spin {
    animation: slowSpin 20s linear infinite;
}

/* ===========================
   DIRECTIONAL FADES
   =========================== */
.fade-in-left {
    opacity: 0;
    transform: translateX(-40px);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(40px);
}

.fade-in-left.visible,
.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

/* ===========================
   BOUNCE IN
   =========================== */
@keyframes bounceIn {
    0% { transform: scale(0.8); opacity: 0; }
    60% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(1); }
}

.bounce-in.visible {
    animation: bounceIn 0.6s ease forwards;
}

/* ===========================
   UNDERLINE SLIDE
   =========================== */
.underline-slide {
    position: relative;
    display: inline-block;
}

.underline-slide::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--red);
    border-radius: 2px;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.underline-slide:hover::after {
    width: 100%;
}

/* ===========================
   MOBILE MENU OVERLAY
   =========================== */
.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    z-index: 998;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Smooth section transitions */
section {
    position: relative;
}

/* ===========================
   LOADING SHIMMER
   =========================== */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.shimmer {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* ===========================
   RESPONSIVE: disable heavy effects on mobile
   =========================== */
@media (max-width: 768px) {
    .depth-section {
        transform: none;
        opacity: 0;
        transition: opacity 0.6s ease;
    }
    .depth-section.depth-visible {
        transform: none;
        opacity: 1;
    }
    .category-card-content,
    .highlight-content,
    .category-card-image img,
    .highlight-image img {
        transform: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .depth-section { transform: none; opacity: 1; }
    .reveal { transform: none; opacity: 1; }
    .scroll-progress { display: none; }
}