/**
 * TECH Menuiserie - Shared Animations Library
 * ============================================
 * Mercedes-style: elegant, subtil, premium
 * Conform CODEX VALI design guidelines
 *
 * Usage: Include acest fișier în toate paginile
 * <link rel="stylesheet" href="../BRAND/css/tech-animations.css">
 */

/* ============================================
   CSS VARIABLES (for consistency)
   ============================================ */
:root {
    /* Animation Timings */
    --anim-fast: 0.2s;
    --anim-normal: 0.3s;
    --anim-slow: 0.6s;
    --anim-reveal: 0.7s;

    /* Easing Functions */
    --ease-default: ease;
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce-subtle: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Transform Values */
    --lift-small: -2px;
    --lift-medium: -4px;
    --slide-up: 25px;
    --slide-up-large: 30px;
}


/* ============================================
   1. REVEAL ON SCROLL
   ============================================ */

/* Base reveal class - add to elements that should animate on scroll */
.reveal {
    opacity: 0;
    transform: translateY(var(--slide-up));
    transition: opacity var(--anim-reveal) var(--ease-smooth),
                transform var(--anim-reveal) var(--ease-smooth);
}

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

/* Reveal with cascade delay for child elements (cards in grid) */
.reveal-cascade.visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-cascade.visible > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-cascade.visible > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-cascade.visible > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-cascade.visible > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-cascade.visible > *:nth-child(6) { transition-delay: 0.3s; }

/* Reveal children (for grids where children should each reveal) */
.reveal-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s var(--ease-smooth),
                transform 0.5s var(--ease-smooth);
}

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

/* Fade only (minimal) */
.reveal-fade {
    opacity: 0;
    transition: opacity 0.8s var(--ease-default);
}

.reveal-fade.visible {
    opacity: 1;
}


/* ============================================
   2. CARD HOVER EFFECTS
   ============================================ */

/* Standard card lift - Mercedes style */
.hover-lift {
    transition: transform var(--anim-normal) var(--ease-smooth),
                box-shadow var(--anim-normal) var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(var(--lift-medium));
    box-shadow: 0 12px 24px rgba(0, 49, 104, 0.12);
}

/* Card lift with border highlight */
.hover-lift-border {
    transition: transform var(--anim-normal) var(--ease-smooth),
                box-shadow var(--anim-normal) var(--ease-smooth),
                border-color var(--anim-normal) var(--ease-smooth);
    border: 2px solid transparent;
}

.hover-lift-border:hover {
    transform: translateY(var(--lift-medium));
    box-shadow: 0 12px 24px rgba(0, 49, 104, 0.12);
    border-color: var(--accent, #ef7c1a);
}

/* Subtle scale effect */
.hover-scale {
    transition: transform var(--anim-fast) var(--ease-smooth),
                box-shadow var(--anim-fast) var(--ease-smooth);
}

.hover-scale:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 49, 104, 0.1);
}


/* ============================================
   3. BUTTON EFFECTS
   ============================================ */

/* Primary button with lift and glow */
.btn-animate {
    transition: transform var(--anim-fast) var(--ease-smooth),
                box-shadow var(--anim-fast) var(--ease-smooth),
                background-color var(--anim-fast) var(--ease-smooth);
}

.btn-animate:hover {
    transform: translateY(var(--lift-small));
    box-shadow: 0 6px 16px rgba(239, 124, 26, 0.35);
}

.btn-animate:active {
    transform: translateY(0);
}

/* CTA button specific */
.cta-animate {
    transition: transform var(--anim-fast) var(--ease-smooth),
                box-shadow var(--anim-fast) var(--ease-smooth),
                background-color var(--anim-fast) var(--ease-smooth);
}

.cta-animate:hover {
    transform: translateY(var(--lift-small));
    box-shadow: 0 6px 16px rgba(239, 124, 26, 0.4);
    background-color: #f7931e;
}


/* ============================================
   4. PAGE LOAD ANIMATIONS
   ============================================ */

/* Fade in up keyframe */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(var(--slide-up-large));
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero elements with staggered animation */
.hero-animate h1,
.hero-animate .hero-title {
    animation: fadeInUp 0.8s var(--ease-smooth) forwards;
}

.hero-animate p,
.hero-animate .hero-subtitle {
    animation: fadeInUp 0.8s var(--ease-smooth) 0.15s forwards;
    opacity: 0;
}

.hero-animate .hero-cta,
.hero-animate .btn {
    animation: fadeInUp 0.8s var(--ease-smooth) 0.3s forwards;
    opacity: 0;
}

/* Simple fade in */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.6s var(--ease-default) forwards;
}


/* ============================================
   5. FORM ELEMENTS
   ============================================ */

/* Input focus effect */
.input-animate {
    transition: border-color var(--anim-fast) var(--ease-smooth),
                box-shadow var(--anim-fast) var(--ease-smooth);
}

.input-animate:focus {
    border-color: var(--primary, #003168);
    box-shadow: 0 0 0 3px rgba(0, 49, 104, 0.1);
    outline: none;
}

/* Checkbox/Radio selection animation */
.option-animate {
    transition: border-color var(--anim-fast) var(--ease-smooth),
                background-color var(--anim-fast) var(--ease-smooth),
                transform var(--anim-fast) var(--ease-smooth);
}

.option-animate:hover {
    border-color: var(--primary-light, #4a6fa5);
}

.option-animate.selected {
    border-color: var(--accent, #ef7c1a);
    background-color: rgba(239, 124, 26, 0.05);
}


/* ============================================
   6. NAVIGATION & UI ELEMENTS
   ============================================ */

/* Header link hover */
.nav-link-animate {
    transition: color var(--anim-fast) var(--ease-smooth);
}

.nav-link-animate:hover {
    color: var(--primary, #003168);
}

/* Mobile menu */
.mobile-menu-animate {
    opacity: 0;
    transform: translateX(100%);
    transition: opacity var(--anim-normal) var(--ease-smooth),
                transform var(--anim-normal) var(--ease-smooth);
}

.mobile-menu-animate.active {
    opacity: 1;
    transform: translateX(0);
}

/* Back to top button */
.back-to-top-animate {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity var(--anim-normal) var(--ease-smooth),
                visibility var(--anim-normal) var(--ease-smooth),
                transform var(--anim-normal) var(--ease-smooth),
                background-color var(--anim-fast) var(--ease-smooth);
}

.back-to-top-animate.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-animate:hover {
    background-color: var(--accent, #ef7c1a);
    transform: scale(1.1);
}


/* ============================================
   7. LOADING STATES
   ============================================ */

/* Skeleton loading pulse */
@keyframes skeletonPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
}

/* Spinner */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border, #e5e7eb);
    border-top-color: var(--primary, #003168);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}


/* ============================================
   8. ACCESSIBILITY
   ============================================ */

/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal,
    .reveal-fade,
    .reveal-children > * {
        opacity: 1;
        transform: none;
    }
}


/* ============================================
   JAVASCRIPT HELPER (include in page)
   ============================================

// Reveal on scroll - IntersectionObserver
document.addEventListener('DOMContentLoaded', () => {
    const reveals = document.querySelectorAll('.reveal, .reveal-fade, .reveal-cascade, .reveal-children');

    if ('IntersectionObserver' in window) {
        const revealObserver = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('visible');
                    revealObserver.unobserve(entry.target);
                }
            });
        }, {
            threshold: 0.15,
            rootMargin: '0px 0px -50px 0px'
        });

        reveals.forEach(el => revealObserver.observe(el));
    } else {
        // Fallback for older browsers
        reveals.forEach(el => el.classList.add('visible'));
    }

    // Back to top visibility
    const backToTop = document.querySelector('.back-to-top-animate');
    if (backToTop) {
        window.addEventListener('scroll', () => {
            backToTop.classList.toggle('visible', window.scrollY > 300);
        });
    }
});

*/