/**
 * Trinails Portfolio Website - Animations & Transitions
 * File: static/css/animations.css
 * Purpose: Opening logo intro preloader, scroll-triggered reveals,
 *          smooth glass transitions, and ambient floating animations.
 */

/* =============================================================================
   1. Site Intro Opening Screen (Logo Intro Animation)
   ============================================================================= */

/* Lock document scrolling while intro screen is presenting */
body.is-intro-active {
    overflow: hidden !important;
}

.site-intro-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 999999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse 90% 80% at 50% 40%, #273B09 0%, #152506 50%, #002400 100%);
    opacity: 1;
    visibility: visible;
    transition: opacity 0.65s cubic-bezier(0.77, 0, 0.175, 1),
                visibility 0.65s cubic-bezier(0.77, 0, 0.175, 1),
                transform 0.65s cubic-bezier(0.77, 0, 0.175, 1);
    will-change: opacity, transform;
    pointer-events: all;
    user-select: none;
}

/* Background atmospheric ambient orbs for intro */
.intro-loader-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.intro-ambient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    pointer-events: none;
}

.intro-ambient-orb-1 {
    width: 380px;
    height: 380px;
    top: 20%;
    left: 20%;
    background: radial-gradient(circle, #BBCF8D 0%, rgba(123, 144, 75, 0) 70%);
    animation: introOrbFloat1 3s ease-in-out infinite alternate;
}

.intro-ambient-orb-2 {
    width: 440px;
    height: 440px;
    bottom: 15%;
    right: 18%;
    background: radial-gradient(circle, #58641D 0%, rgba(39, 59, 9, 0) 70%);
    animation: introOrbFloat2 3.5s ease-in-out infinite alternate;
}

/* Intro Core Content Container */
.intro-loader-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-6, 24px);
    max-width: 420px;
}

/* Glowing Aura Behind Animated Logo */
.intro-logo-glow {
    position: absolute;
    width: 260px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, rgba(187, 207, 141, 0.45) 0%, rgba(88, 100, 29, 0.25) 45%, transparent 70%);
    filter: blur(28px);
    z-index: 1;
    pointer-events: none;
    animation: introGlowPulse 1.8s ease-in-out infinite alternate;
}

/* Logo Image Wrapper & Frame */
.intro-logo-wrapper {
    position: relative;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    padding: 12px 20px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(187, 207, 141, 0.30);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 16px 48px rgba(0, 36, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.2);
    overflow: hidden;
    animation: introLogoReveal 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.intro-logo-img {
    height: 52px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
    position: relative;
    z-index: 2;
}

/* Shimmer Light Reflection Sweep Across the Logo */
.intro-logo-shimmer {
    position: absolute;
    top: -50%;
    left: -100%;
    width: 60%;
    height: 200%;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.55) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(25deg);
    z-index: 3;
    pointer-events: none;
    animation: introShimmerSweep 1.6s cubic-bezier(0.4, 0, 0.2, 1) 0.35s infinite;
}

/* Progress Track and Bar */
.intro-loader-bar {
    width: 150px;
    height: 3px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    overflow: hidden;
    position: relative;
    margin-bottom: 16px;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3);
}

.intro-loader-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #7B904B 0%, #BBCF8D 50%, #FFFFFF 100%);
    border-radius: 999px;
    box-shadow: 0 0 12px #BBCF8D;
    animation: introProgressFill 1.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Subtle Tagline */
.intro-tagline {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-primary, 'Manrope', sans-serif);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(223, 227, 214, 0.85);
    opacity: 0;
    transform: translateY(6px);
    animation: introTaglineFade 0.7s ease-out 0.45s forwards;
}

.intro-tagline-dot {
    color: #BBCF8D;
    font-size: 0.9rem;
}

/* Intro Leaving & Exit State (Page reveal) */
.site-intro-loader.is-leaving {
    opacity: 0;
    transform: scale(1.04);
    pointer-events: none;
}

.site-intro-loader.is-hidden {
    display: none !important;
}

/* Intro Keyframe Animations */
@keyframes introLogoReveal {
    0% {
        opacity: 0;
        transform: scale(0.82) translateY(16px);
        filter: blur(10px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0px);
    }
}

@keyframes introShimmerSweep {
    0% {
        left: -100%;
    }
    60%, 100% {
        left: 200%;
    }
}

@keyframes introGlowPulse {
    0% {
        opacity: 0.4;
        transform: scale(0.92);
    }
    100% {
        opacity: 0.85;
        transform: scale(1.15);
    }
}

@keyframes introProgressFill {
    0% {
        width: 0%;
    }
    30% {
        width: 45%;
    }
    70% {
        width: 82%;
    }
    100% {
        width: 100%;
    }
}

@keyframes introTaglineFade {
    0% {
        opacity: 0;
        transform: translateY(8px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes introOrbFloat1 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(25px, -20px); }
}

@keyframes introOrbFloat2 {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-30px, 20px); }
}


/* =============================================================================
   2. Scroll-Triggered Reveal Animations (IntersectionObserver System)
   ============================================================================= */

/* Base initial hidden state for scroll-animated elements */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.75s cubic-bezier(0.16, 1, 0.3, 1),
                filter 0.75s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

/* Once scrolled into view: activate transition to natural state */
.reveal-on-scroll.is-revealed {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0px);
}

/* Directional and Style Variants */
.reveal-fade-up {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-fade-up.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-fade-left {
    opacity: 0;
    transform: translateX(-36px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-fade-left.is-revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-fade-right {
    opacity: 0;
    transform: translateX(36px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-fade-right.is-revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.92) translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-scale.is-revealed {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* Stagger Delay Classes */
.delay-100 { transition-delay: 100ms !important; }
.delay-150 { transition-delay: 150ms !important; }
.delay-200 { transition-delay: 200ms !important; }
.delay-250 { transition-delay: 250ms !important; }
.delay-300 { transition-delay: 300ms !important; }
.delay-400 { transition-delay: 400ms !important; }
.delay-500 { transition-delay: 500ms !important; }
.delay-600 { transition-delay: 600ms !important; }

/* Stagger Groups: Children cascade automatically when parent reveals */
.reveal-stagger-group > * {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal-stagger-group.is-revealed > *:nth-child(1) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 60ms;
}

.reveal-stagger-group.is-revealed > *:nth-child(2) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 160ms;
}

.reveal-stagger-group.is-revealed > *:nth-child(3) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 260ms;
}

.reveal-stagger-group.is-revealed > *:nth-child(4) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 360ms;
}

.reveal-stagger-group.is-revealed > *:nth-child(5) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 460ms;
}

.reveal-stagger-group.is-revealed > *:nth-child(6) {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 560ms;
}


/* =============================================================================
   3. Hero Entrance Animations (Triggered as intro opens)
   ============================================================================= */

body.site-ready .hero-badge {
    animation: heroItemFadeIn 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.05s backwards;
}

body.site-ready .hero-headline {
    animation: heroItemFadeIn 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.15s backwards;
}

body.site-ready .hero-description {
    animation: heroItemFadeIn 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.25s backwards;
}

body.site-ready .hero-actions {
    animation: heroItemFadeIn 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.35s backwards;
}

body.site-ready .hero-meta {
    animation: heroItemFadeIn 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.45s backwards;
}

body.site-ready .hero-visual {
    animation: heroVisualPop 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

@keyframes heroItemFadeIn {
    0% {
        opacity: 0;
        transform: translateY(24px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes heroVisualPop {
    0% {
        opacity: 0;
        transform: scale(0.93) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}


/* =============================================================================
   4. Ambient Floating & Interactive Motion
   ============================================================================= */

/* Floating Pills & Geometric Orbs */
.floating-pill-top {
    animation: floatVertical 4s ease-in-out infinite alternate !important;
}

.floating-card-bottom {
    animation: floatDiagonal 5s ease-in-out 0.5s infinite alternate !important;
}

.visual-ambient-blob {
    animation: blobMorph 8s ease-in-out infinite alternate;
}

@keyframes floatVertical {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-8px);
    }
}

@keyframes floatDiagonal {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(-5px, -9px);
    }
}

@keyframes blobMorph {
    0% {
        transform: scale(1) rotate(0deg);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.08) rotate(4deg);
        opacity: 0.85;
    }
    100% {
        transform: scale(0.98) rotate(-3deg);
        opacity: 0.65;
    }
}

/* Card Hover Micro-Interactions */
.service-item,
.work-item,
.process-step {
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.service-item:hover,
.work-item:hover {
    transform: translateY(-6px) !important;
}

.process-step:hover {
    transform: translateY(-4px) !important;
}


/* =============================================================================
   5. Sticky Header Scroll Enhancement
   ============================================================================= */
.site-header.is-scrolled {
    background-color: rgba(24, 40, 6, 0.95) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    box-shadow: 0 10px 30px rgba(0, 36, 0, 0.35), inset 0 -1px 0 rgba(187, 207, 141, 0.3) !important;
}


/* =============================================================================
   6. Accessibility & Reduced Motion Preferences
   ============================================================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001s !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001s !important;
    }

    .site-intro-loader {
        display: none !important;
    }

    body.is-intro-active {
        overflow: auto !important;
    }

    .reveal-on-scroll,
    .reveal-fade-up,
    .reveal-fade-left,
    .reveal-fade-right,
    .reveal-scale,
    .reveal-stagger-group > * {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
    }
}