/* 
* Animations stylesheet for Didier Merk's academic resume website
* Contains all animations and transition effects
* Version: 1.0
*/

/* Fade In Up Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Scroll Arrow Animation */
@keyframes scrollArrow {
    0% {
        opacity: 0;
        transform: rotate(45deg) translate(-5px, -5px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: rotate(45deg) translate(5px, 5px);
    }
}

/* Pulse Animation */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* Highlight Animation */
@keyframes highlight {
    0% {
        background-position: -100% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Fade Out Down Animation */
@keyframes fadeOutDown {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* Button Pulse Animation */
@keyframes buttonPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(100, 255, 218, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0);
    }
}

/* Slide In Animation */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Slide Out Animation */
@keyframes slideOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(-30px);
    }
}

/* Slide Down Animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scale Up Animation */
@keyframes scaleUp {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Improved Back Button Animation */
@keyframes backButtonPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.6);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(100, 255, 218, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0);
    }
}

/* Apply animations to degree details */
.slide-in {
    animation: slideIn 0.4s ease forwards;
}

.slide-out {
    animation: slideOut 0.4s ease forwards;
}

.degree-detail-info {
    animation: slideDown 0.5s ease forwards;
}

.degree-highlights {
    animation: scaleUp 0.5s ease forwards;
    animation-delay: 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

/* Highlight animation for degree links */
@keyframes degreePulse {
    0% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.4);
    }
    70% {
        box-shadow: 0 0 0 5px rgba(100, 255, 218, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0);
    }
}

.degree-link:active {
    animation: degreePulse 0.8s ease-out;
}

/* Back button animation */
.back-to-education {
    position: relative;
    overflow: hidden;
    animation: backButtonPulse 2s infinite;
}

.back-to-education:hover {
    animation: none;
}

.back-to-education::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(100, 255, 218, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.back-to-education:hover::after {
    transform: translateX(0);
}

/* Hero Section Animations */
.hero-text h1 {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.3s;
}

.hero-text h3:first-child {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.1s;
}

.hero-text h3:not(:first-child) {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.5s;
}

.hero-text p {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.7s;
}

.social-links {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards 0.9s;
}

.hero-image {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.scroll-indicator {
    opacity: 0;
    animation: fadeIn 0.6s ease forwards 1.5s;
}

/* Section Title Animation */
.section-title {
    position: relative;
    overflow: hidden;
}

.section-title::after {
    animation: highlight 2s ease forwards;
}

/* Timeline Item Animation */
.timeline-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* Timeline Expandable Animations */
@keyframes expandTimeline {
    from {
        max-height: 0;
        opacity: 0;
    }
    to {
        max-height: 500px;
        opacity: 1;
    }
}

@keyframes collapseTimeline {
    from {
        max-height: 500px;
        opacity: 1;
    }
    to {
        max-height: 0;
        opacity: 0;
    }
}

@keyframes rotateChevron {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(180deg);
    }
}

@keyframes highlightDot {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.4);
    }
    50% {
        transform: scale(1.2);
        box-shadow: 0 0 0 5px rgba(100, 255, 218, 0);
    }
    100% {
        transform: scale(1.2);
        box-shadow: 0 0 10px rgba(100, 255, 218, 0.4);
    }
}

.timeline-item[data-expanded="true"] .timeline-dot {
    animation: highlightDot 0.5s ease forwards;
}

.timeline-item[data-expanded="true"] .timeline-content {
    animation: cardHighlight 0.5s ease forwards;
}

@keyframes cardHighlight {
    from {
        box-shadow: 0 0 0 rgba(100, 255, 218, 0);
        background-color: var(--card-bg);
    }
    to {
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
        background-color: rgba(100, 255, 218, 0.05);
    }
}

.timeline-expandable-animating {
    animation: expandTimeline 0.5s ease forwards;
}

.timeline-collapsible-animating {
    animation: collapseTimeline 0.5s ease forwards;
}

.chevron-rotate {
    animation: rotateChevron 0.3s ease forwards;
}

/* Project Card Animation */
.project-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.project-card.active {
    opacity: 1;
    transform: translateY(0);
}

/* Project link animation */
@keyframes projectLinkPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.4);
    }
    70% {
        box-shadow: 0 0 0 5px rgba(100, 255, 218, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(100, 255, 218, 0);
    }
}

.project-title a:active {
    animation: projectLinkPulse 0.8s ease-out;
}

/* Publication Item Animation */
.publication-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.publication-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* Skills List Animation */
.skills-list li {
    opacity: 0;
    transform: translateX(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.skills-list li:nth-child(1) { animation-delay: 0.1s; }
.skills-list li:nth-child(2) { animation-delay: 0.2s; }
.skills-list li:nth-child(3) { animation-delay: 0.3s; }
.skills-list li:nth-child(4) { animation-delay: 0.4s; }
.skills-list li:nth-child(5) { animation-delay: 0.5s; }
.skills-list li:nth-child(6) { animation-delay: 0.6s; }
.skills-list li:nth-child(7) { animation-delay: 0.7s; }
.skills-list li:nth-child(8) { animation-delay: 0.8s; }

/* Education Item Animation */
.education-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.education-item:nth-child(1) { animation-delay: 0.2s; }
.education-item:nth-child(2) { animation-delay: 0.3s; }
.education-item:nth-child(3) { animation-delay: 0.4s; }

/* Back to Top Button Animation */
.back-to-top {
    animation: pulse 2s infinite;
}

/* About Section Toggle Animations */
.toggle-btn.active {
    animation: buttonPulse 1.5s ease-out 1;
}

.info-card.active {
    animation: fadeInUp 0.5s ease forwards;
}

.info-card:not(.active) {
    animation: fadeOutDown 0.5s ease forwards;
}

/* Skills Grid Animation */
.skills-grid .skill-item {
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.4s ease forwards;
}

.skills-grid .skill-item:nth-child(1) { animation-delay: 0.1s; }
.skills-grid .skill-item:nth-child(2) { animation-delay: 0.15s; }
.skills-grid .skill-item:nth-child(3) { animation-delay: 0.2s; }
.skills-grid .skill-item:nth-child(4) { animation-delay: 0.25s; }
.skills-grid .skill-item:nth-child(5) { animation-delay: 0.3s; }
.skills-grid .skill-item:nth-child(6) { animation-delay: 0.35s; }
.skills-grid .skill-item:nth-child(7) { animation-delay: 0.4s; }
.skills-grid .skill-item:nth-child(8) { animation-delay: 0.45s; }

@keyframes successPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(76, 175, 80, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    }
}

@keyframes errorShake {
    0%, 100% {
        transform: translateX(0);
    }
    20%, 60% {
        transform: translateX(-5px);
    }
    40%, 80% {
        transform: translateX(5px);
    }
}

/* Tab System Animations */
@keyframes fadeInTab {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOutTab {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

@keyframes indicatorSlide {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

.tab-btn.animate-in .tab-indicator {
    animation: indicatorSlide 0.4s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
}

.tab-panel.animate-in {
    animation: fadeInTab 0.45s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
}

.tab-panel.animate-out {
    animation: fadeOutTab 0.35s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
}

/* Simplified Skills Animation System */
.skills-grid .skill-item {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Define the order for skill items to appear */
#skills-tab.show-skills .skill-item:nth-child(1),
#skills-tab.show-skills .skill-item:nth-child(2) {
    transition-delay: 0.05s;
}

#skills-tab.show-skills .skill-item:nth-child(3),
#skills-tab.show-skills .skill-item:nth-child(4) {
    transition-delay: 0.1s;
}

#skills-tab.show-skills .skill-item:nth-child(5),
#skills-tab.show-skills .skill-item:nth-child(6) {
    transition-delay: 0.15s;
}

#skills-tab.show-skills .skill-item:nth-child(7),
#skills-tab.show-skills .skill-item:nth-child(8) {
    transition-delay: 0.2s;
}

/* When the show-skills class is added, make all items visible */
#skills-tab.show-skills .skill-item {
    opacity: 1;
    transform: translateY(0);
}

/* Tab Navigation Hide Animation */
@keyframes tabsSlideUp {
    from {
        opacity: 1;
        transform: translateY(0);
        max-height: 60px;
        margin-bottom: 1.5rem;
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
        max-height: 0;
        margin-bottom: 0;
    }
}

/* Tab Navigation Show Animation */
@keyframes tabsSlideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
        max-height: 0;
        margin-bottom: 0;
    }
    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 60px;
        margin-bottom: 1.5rem;
    }
}

.tabs-nav-slide-up {
    animation: tabsSlideUp 0.4s ease forwards;
}

.tabs-nav-slide-down {
    animation: tabsSlideDown 0.4s ease forwards;
}

/* Add these to your animations.css file */
@keyframes expandContainer {
    from { max-height: var(--prev-height); }
    to { max-height: var(--new-height); }
}

@keyframes fadeContent {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tabs-content-animating {
    transition: height 0.3s ease-out;
    overflow: hidden;
}

.content-fade-in {
    animation: fadeContent 0.3s ease-out forwards;
}

.content-fade-out {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s ease-out, transform 0.2s ease-out;
}