/* ===========================================
   CSS Scroll-Driven Animations
   Uses the modern Scroll Timeline API
   =========================================== */

/* Base animation keyframes */
@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slide-up {
    from {
        opacity: 0;
        transform: translateY(60px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slide-in-left {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scale-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes blur-in {
    from {
        opacity: 0;
        filter: blur(10px);
    }
    to {
        opacity: 1;
        filter: blur(0);
    }
}

@keyframes reveal-up {
    from {
        opacity: 0;
        transform: translateY(100%);
        clip-path: inset(100% 0 0 0);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        clip-path: inset(0 0 0 0);
    }
}

/* ===========================================
   Scroll-triggered animations using 
   animation-timeline: view()
   =========================================== */

/* Generic scroll-animate class */
.scroll-animate {
    animation: slide-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

.scroll-animate-fade {
    animation: fade-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 25%;
}

.scroll-animate-scale {
    animation: scale-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

.scroll-animate-blur {
    animation: blur-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
}

/* ===========================================
   Hero Section Animations (on load + scroll)
   =========================================== */

/* Initial entrance animations */
.hero .pill {
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.title-line-1 {
    animation: blur-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both;
}

.title-line-2 {
    animation: blur-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

.hero h1 {
    animation: blur-in 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-subtitle {
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}

.cta-group {
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero-stats {
    animation: fade-in 1s cubic-bezier(0.16, 1, 0.3, 1) 0.6s both;
}

.hero-stats .stat {
    animation: slide-up 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-stats .stat:nth-child(1) { animation-delay: 0.65s; }
.hero-stats .stat:nth-child(2) { animation-delay: 0.75s; }
.hero-stats .stat:nth-child(3) { animation-delay: 0.85s; }

/* Floating shapes entrance */
.shape {
    animation: scale-in 1.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.shape-1 { animation-delay: 0.3s; }
.shape-2 { animation-delay: 0.4s; }
.shape-3 { animation-delay: 0.5s; }
.shape-4 { animation-delay: 0.6s; }
.shape-5 { animation-delay: 0.7s; }

/* ===========================================
   Hero Scroll-Driven Effects
   =========================================== */

@keyframes hero-parallax-up {
    from { transform: translateY(0); }
    to { transform: translateY(-100px); }
}

@keyframes hero-parallax-down {
    from { transform: translateY(0); }
    to { transform: translateY(50px); }
}

@keyframes hero-fade-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes hero-scale-down {
    from { transform: scale(1); opacity: 1; }
    to { transform: scale(0.9); opacity: 0; }
}

@keyframes hero-blur-out {
    from { filter: blur(0); opacity: 1; }
    to { filter: blur(10px); opacity: 0; }
}

@keyframes glow-pulse {
    from { transform: translateX(-50%) scale(1); opacity: 0.15; }
    to { transform: translateX(-50%) scale(1.3); opacity: 0.05; }
}

@keyframes shape-float {
    from { transform: rotate(45deg) translateY(0); }
    to { transform: rotate(45deg) translateY(-30px); }
}

@keyframes shape-float-circle {
    from { transform: translateY(0); }
    to { transform: translateY(-40px); }
}

/* Apply scroll-driven animations */
@supports (animation-timeline: scroll()) {
    .hero-content {
        animation: hero-scale-down linear both;
        animation-timeline: scroll();
        animation-range: 0px 500px;
    }
    
    .hero-glow-1 {
        animation: glow-pulse linear both;
        animation-timeline: scroll();
        animation-range: 0px 600px;
    }
    
    .hero-glow-2 {
        animation: hero-parallax-up linear both;
        animation-timeline: scroll();
        animation-range: 0px 400px;
    }
    
    .shape-1 {
        animation: shape-float linear both;
        animation-timeline: scroll();
        animation-range: 0px 500px;
    }
    
    .shape-2 {
        animation: shape-float-circle linear both;
        animation-timeline: scroll();
        animation-range: 0px 400px;
    }
    
    .shape-3 {
        animation: shape-float-circle linear both;
        animation-timeline: scroll();
        animation-range: 0px 600px;
    }
    
    .shape-4 {
        animation: shape-float linear both;
        animation-timeline: scroll();
        animation-range: 0px 350px;
    }
    
    .shape-5 {
        animation: hero-parallax-up linear both;
        animation-timeline: scroll();
        animation-range: 0px 450px;
    }
    
    .grid-line-h {
        animation: hero-fade-out linear both;
        animation-timeline: scroll();
        animation-range: 100px 400px;
    }
    
    .grid-line-v {
        animation: hero-fade-out linear both;
        animation-timeline: scroll();
        animation-range: 150px 450px;
    }
    
    .scroll-indicator {
        animation: hero-fade-out linear both;
        animation-timeline: scroll();
        animation-range: 0px 150px;
    }
}

.cta-group {
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
}

/* ===========================================
   Feature Cards - Scroll Animations
   =========================================== */

.features .section-header {
    animation: slide-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

.feature-card {
    animation: slide-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 35%;
}

/* Staggered delays for feature cards */
.feature-card:nth-child(1) { animation-delay: 0ms; }
.feature-card:nth-child(2) { animation-delay: 50ms; }
.feature-card:nth-child(3) { animation-delay: 100ms; }
.feature-card:nth-child(4) { animation-delay: 150ms; }
.feature-card:nth-child(5) { animation-delay: 200ms; }
.feature-card:nth-child(6) { animation-delay: 250ms; }

/* ===========================================
   Component Cards - Scroll Animations
   =========================================== */

.component-card {
    animation: scale-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

/* Staggered delays for component cards */
.component-card:nth-child(1) { animation-delay: 0ms; }
.component-card:nth-child(2) { animation-delay: 30ms; }
.component-card:nth-child(3) { animation-delay: 60ms; }
.component-card:nth-child(4) { animation-delay: 90ms; }
.component-card:nth-child(5) { animation-delay: 120ms; }
.component-card:nth-child(6) { animation-delay: 150ms; }
.component-card:nth-child(7) { animation-delay: 0ms; }
.component-card:nth-child(8) { animation-delay: 30ms; }
.component-card:nth-child(9) { animation-delay: 60ms; }
.component-card:nth-child(10) { animation-delay: 90ms; }
.component-card:nth-child(11) { animation-delay: 120ms; }
.component-card:nth-child(12) { animation-delay: 150ms; }

/* ===========================================
   Page Headers - Entrance Animations
   =========================================== */

.page-header h1 {
    animation: blur-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.page-subtitle {
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

/* ===========================================
   Documentation Page Animations
   =========================================== */

.docs-sidebar {
    animation: slide-in-left 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.docs-content {
    animation: fade-in 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}

.docs-content section {
    animation: slide-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 25%;
}

.component-preview {
    animation: scale-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

/* Code blocks scroll animation */
.code-block {
    animation: slide-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 25%;
}

/* ===========================================
   Footer Animation
   =========================================== */

.site-footer {
    animation: fade-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
}

/* ===========================================
   Header Scroll Effects
   =========================================== */

@keyframes header-shrink {
    from {
        padding-top: 24px;
        padding-bottom: 24px;
        background: rgba(0, 0, 0, 0.5);
    }
    to {
        padding-top: 16px;
        padding-bottom: 16px;
        background: rgba(0, 0, 0, 0.9);
    }
}

/* Using scroll() for header - tied to document scroll */
@supports (animation-timeline: scroll()) {
    .site-header {
        animation: header-shrink linear both;
        animation-timeline: scroll();
        animation-range: 0px 200px;
    }
}

/* ===========================================
   Parallax-like scroll effects
   =========================================== */

@keyframes parallax-slow {
    from {
        transform: translateY(-20px);
    }
    to {
        transform: translateY(20px);
    }
}

.grid-background {
    animation: parallax-slow linear both;
    animation-timeline: scroll();
    animation-range: 0% 100%;
}

/* ===========================================
   Progress indicator on scroll
   =========================================== */

@keyframes grow-progress {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--highlight-color);
    transform-origin: left;
    z-index: 1000;
    animation: grow-progress linear both;
    animation-timeline: scroll();
}

/* ===========================================
   Reveal on scroll - text elements
   =========================================== */

.reveal-text {
    animation: reveal-up linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 30%;
}

/* ===========================================
   Smooth entrance for images/icons
   =========================================== */

.card-icon {
    animation: scale-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 25%;
}

/* ===========================================
   Fallback for browsers without support
   =========================================== */

@supports not (animation-timeline: view()) {
    .scroll-animate,
    .scroll-animate-fade,
    .scroll-animate-scale,
    .scroll-animate-blur,
    .feature-card,
    .component-card,
    .docs-content section,
    .component-preview,
    .code-block,
    .site-footer,
    .card-icon,
    .reveal-text {
        animation: none;
        opacity: 1;
        transform: none;
        filter: none;
    }
    
    .grid-background {
        animation: none;
        transform: none;
    }
    
    .site-header {
        animation: none;
    }
}

/* ===========================================
   Reduced motion preference
   =========================================== */

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