/**
 * Regentropfen University College - Premium Animations
 * Smooth, professional animations for world-class UX
 */

/* ===== BASE ANIMATION PROPERTIES ===== */
:root {
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-elastic: cubic-bezier(0.68, -0.6, 0.32, 1.6);
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
}

/* ===== FADE ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== SCALE ANIMATIONS ===== */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes scaleUp {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* ===== SLIDE ANIMATIONS ===== */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== HERO SPECIFIC ANIMATIONS ===== */
@keyframes heroTextReveal {
    0% {
        opacity: 0;
        transform: translateY(50px);
        filter: blur(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

@keyframes heroImagePan {
    0% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes floatSlow {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

@keyframes floatMedium {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(-2deg); }
}

/* ===== LOADER ANIMATIONS ===== */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.1); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-20px); }
    60% { transform: translateY(-10px); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* ===== SCROLL-TRIGGERED ANIMATION CLASSES ===== */
.animate-on-scroll {
    opacity: 0;
    transition: all 0.8s var(--ease-out-expo);
}

.animate-on-scroll.visible {
    opacity: 1;
}

.animate-on-scroll.fade-up {
    transform: translateY(40px);
}

.animate-on-scroll.fade-up.visible {
    transform: translateY(0);
}

.animate-on-scroll.fade-left {
    transform: translateX(-40px);
}

.animate-on-scroll.fade-left.visible {
    transform: translateX(0);
}

.animate-on-scroll.fade-right {
    transform: translateX(40px);
}

.animate-on-scroll.fade-right.visible {
    transform: translateX(0);
}

.animate-on-scroll.scale-up {
    transform: scale(0.9);
}

.animate-on-scroll.scale-up.visible {
    transform: scale(1);
}

/* Stagger Children Animation */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s var(--ease-out-expo);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.6s; }

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

/* ===== HOVER ANIMATIONS ===== */
.hover-lift {
    transition: transform 0.3s var(--ease-smooth), box-shadow 0.3s var(--ease-smooth);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hover-scale {
    transition: transform 0.3s var(--ease-smooth);
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-glow {
    transition: box-shadow 0.3s var(--ease-smooth);
}

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(0, 173, 239, 0.4);
}

/* ===== TEXT ANIMATIONS ===== */
.text-reveal {
    overflow: hidden;
}

.text-reveal span {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%);
    animation: textReveal 0.8s var(--ease-out-expo) forwards;
}

@keyframes textReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Typewriter Effect */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    animation: typing 3.5s steps(40, end), blink 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    from, to { border-color: transparent; }
    50% { border-color: var(--primary-color); }
}

/* ===== COUNTER ANIMATIONS ===== */
.counter-animate {
    transition: all 0.1s linear;
}

/* ===== IMAGE ANIMATIONS ===== */
.img-reveal {
    position: relative;
    overflow: hidden;
}

.img-reveal::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-color);
    transform: scaleX(1);
    transform-origin: right;
    transition: transform 1s var(--ease-out-expo);
}

.img-reveal.revealed::after {
    transform: scaleX(0);
}

.img-reveal img {
    opacity: 0;
    transform: scale(1.2);
    transition: all 1s var(--ease-out-expo) 0.3s;
}

.img-reveal.revealed img {
    opacity: 1;
    transform: scale(1);
}

/* ===== CARD ANIMATIONS ===== */
.card-3d {
    transform-style: preserve-3d;
    perspective: 1000px;
    transition: transform 0.5s var(--ease-smooth);
}

.card-3d:hover {
    transform: rotateY(5deg) rotateX(5deg);
}

/* ===== BUTTON ANIMATIONS ===== */
.btn-animated {
    position: relative;
    overflow: hidden;
}

.btn-animated::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-animated:hover::before {
    width: 300px;
    height: 300px;
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.3) 10%, transparent 10.01%);
    background-repeat: no-repeat;
    background-position: 50%;
    transform: scale(10, 10);
    opacity: 0;
    transition: transform 0.5s, opacity 1s;
}

.ripple:active::after {
    transform: scale(0, 0);
    opacity: 0.3;
    transition: 0s;
}

/* ===== PROGRESS BAR ANIMATIONS ===== */
@keyframes progressFill {
    from { stroke-dashoffset: 100; }
    to { stroke-dashoffset: 0; }
}

@keyframes progressBar {
    from { width: 0; }
    to { width: var(--progress, 100%); }
}

/* ===== MARQUEE ANIMATION ===== */
.marquee {
    overflow: hidden;
    white-space: nowrap;
}

.marquee-content {
    display: inline-block;
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ===== PARALLAX EFFECT ===== */
.parallax {
    transform: translateZ(0);
    will-change: transform;
}

/* ===== MORPHING SHAPES ===== */
@keyframes morphBlob {
    0%, 100% {
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    }
    25% {
        border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
    }
    50% {
        border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%;
    }
    75% {
        border-radius: 60% 40% 60% 30% / 70% 30% 50% 60%;
    }
}

.morph-blob {
    animation: morphBlob 8s ease-in-out infinite;
}

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

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

/* ===== PAGE TRANSITIONS ===== */
.page-transition-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-transition-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.5s var(--ease-out-expo);
}

.page-transition-exit {
    opacity: 1;
}

.page-transition-exit-active {
    opacity: 0;
    transition: opacity 0.3s var(--ease-smooth);
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .animate-on-scroll,
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 1;
        transform: none;
    }
}