/* Animation Utilities */
:root {
    --spring-easing: cubic-bezier(0.28, 1.65, 0.65, 0.95);
    --bounce-easing: cubic-bezier(0.34, 1.56, 0.64, 1);
    --standard-easing: cubic-bezier(0.2, 0, 0, 1);
    
    /* Dynamic Colors */
    --glow-primary: color-mix(in srgb, var(--md-sys-color-primary) 20%, transparent);
    --glow-secondary: color-mix(in srgb, var(--md-sys-color-secondary) 20%, transparent);
    --glow-tertiary: color-mix(in srgb, var(--md-sys-color-tertiary) 20%, transparent);
}

/* Ripple Effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: rippleEffect 0.6s var(--spring-easing);
    background-color: rgba(255, 255, 255, 0.2);
    pointer-events: none;
}

@keyframes rippleEffect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Design Shapes */
.design-shape {
    position: absolute;
    border-radius: 16px;
    backdrop-filter: blur(12px);
    animation: floatAnimation var(--spring-easing) infinite;
    transform-origin: center;
    transition: all 0.4s var(--spring-easing);
}

.design-shape::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(45deg, 
        var(--md-sys-color-primary),
        var(--md-sys-color-secondary),
        var(--md-sys-color-tertiary)
    );
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s var(--spring-easing);
}

.design-shape:hover {
    transform: scale(1.1) rotate(5deg);
}

.design-shape:hover::before {
    opacity: 1;
    animation: borderRotate 2s linear infinite;
}

.shape-1 {
    width: 120px;
    height: 120px;
    top: 5%;
    left: 10%;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
    animation: floatAnimation 6s var(--spring-easing) infinite,
               pulseGlow 3s ease-in-out infinite;
    transform: rotate(15deg);
    box-shadow: 0 8px 32px var(--glow-primary);
    backdrop-filter: blur(16px);
}

.shape-2 {
    width: 80px;
    height: 80px;
    top: 75%;
    right: 15%;
    background: linear-gradient(225deg, var(--md-sys-color-secondary), var(--md-sys-color-tertiary));
    animation: floatAnimation 8s var(--spring-easing) infinite reverse,
               morphShape 4s ease-in-out infinite;
    transform: rotate(-25deg);
    box-shadow: 0 8px 32px var(--glow-secondary);
    backdrop-filter: blur(16px);
}

.shape-3 {
    width: 150px;
    height: 150px;
    bottom: 5%;
    left: 20%;
    background: linear-gradient(45deg, var(--md-sys-color-tertiary), var(--md-sys-color-primary));
    animation: floatAnimation 7s var(--spring-easing) infinite,
               rotateInPlace 10s linear infinite;
    transform: rotate(45deg);
    box-shadow: 0 8px 32px var(--glow-tertiary);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    backdrop-filter: blur(16px);
}

.shape-4 {
    width: 100px;
    height: 100px;
    bottom: 60%;
    right: 25%;
    background: linear-gradient(315deg, var(--md-sys-color-secondary), var(--md-sys-color-primary));
    animation: floatAnimation 9s var(--spring-easing) infinite,
               scaleBreath 5s ease-in-out infinite;
    transform: rotate(-15deg);
    box-shadow: 0 8px 32px var(--glow-primary);
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    backdrop-filter: blur(16px);
}

@keyframes floatAnimation {
    0% {
        transform: translateY(0) rotate(var(--rotation));
    }
    25% {
        transform: translate(10px, -15px) rotate(calc(var(--rotation) + 3deg));
    }
    50% {
        transform: translate(-5px, -25px) rotate(calc(var(--rotation) + 5deg));
    }
    75% {
        transform: translate(-10px, -10px) rotate(calc(var(--rotation) + 2deg));
    }
    100% {
        transform: translateY(0) rotate(var(--rotation));
    }
}

@keyframes pulseGlow {
    0% { box-shadow: 0 8px 32px var(--glow-primary); }
    50% { box-shadow: 0 16px 48px var(--glow-primary), 0 0 24px var(--glow-secondary); }
    100% { box-shadow: 0 8px 32px var(--glow-primary); }
}

@keyframes morphShape {
    0% { border-radius: 16px; }
    50% { border-radius: 50%; }
    100% { border-radius: 16px; }
}

@keyframes rotateInPlace {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes scaleBreath {
    0%, 100% { transform: scale(1) rotate(-15deg); }
    50% { transform: scale(1.1) rotate(-10deg); }
}

@keyframes borderRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Special surprise animation */
@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0); }
    50% { opacity: 1; transform: scale(1); }
}

/* Enhanced Greeting Animation */
.greeting {
    position: relative;
    overflow: hidden;
}

.greeting::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.2) 50%,
        transparent 100%
    );
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    to {
        transform: translateX(100%);
    }
}

/* Scroll Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.1);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Navigation Menu Enhanced */
.nav-menu .nav-item {
    position: relative;
    overflow: hidden;
}

.nav-menu .nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--md-sys-color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s var(--spring-easing);
}

.nav-menu .nav-item:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Button Hover States */
.button:hover,
.icon-button:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
}

.button:active,
.icon-button:active {
    filter: brightness(0.9);
    transform: translateY(1px);
}

/* Interactive Elements Animation */
.interactive {
    transition: all 0.4s var(--spring-easing);
}

.interactive:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.interactive:active {
    transform: scale(0.98);
}

/* Enhanced Close Button */
.close-button {
    position: relative;
    z-index: 2;
}

.close-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--md-sys-color-error);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.4s var(--spring-easing);
    z-index: -1;
}

.close-button:hover {
    color: var(--md-sys-color-on-error) !important;
    transform: rotate(90deg) scale(1.1) !important;
}

.close-button:hover::before {
    width: 100%;
    height: 100%;
    opacity: 1;
}

/* Enhanced Cards */
.card {
    position: relative;
    transition: all 0.4s var(--spring-easing);
    background: var(--md-sys-color-surface-container);
    border-radius: 24px;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        var(--glow-primary),
        var(--glow-secondary),
        var(--glow-tertiary)
    );
    opacity: 0;
    transition: opacity 0.4s var(--spring-easing);
    z-index: 0;
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 8px 24px rgba(0,0,0,0.15),
        0 2px 8px var(--glow-primary);
}

.card:hover::before {
    opacity: 0.1;
}

/* Enhanced Content Sections */
.content-section {
    opacity: 0;
    transform: translateY(20px);
    animation: sectionFadeIn 0.8s var(--spring-easing) forwards;
}

.content-section:nth-child(n) {
    animation-delay: calc(0.2s * var(--section-index, 0));
}

@keyframes sectionFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    50% {
        transform: translateY(-5px) scale(1.02);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Enhanced Headings */
h1, h2, h3, h4, h5, h6 {
    position: relative;
    background: linear-gradient(
        90deg,
        var(--md-sys-color-on-surface) 0%,
        var(--md-sys-color-on-surface-variant) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: all 0.4s var(--spring-easing);
}

h1:hover, h2:hover, h3:hover, h4:hover, h5:hover, h6:hover {
    transform: translateX(4px);
    background: linear-gradient(
        90deg,
        var(--md-sys-color-primary) 0%,
        var(--md-sys-color-tertiary) 100%
    );
    -webkit-background-clip: text;
    background-clip: text;
}

/* Enhanced Links */
a:not(.nav-item) {
    position: relative;
    color: var(--md-sys-color-primary);
    text-decoration: none;
    transition: all 0.3s var(--spring-easing);
}

a:not(.nav-item)::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--md-sys-color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s var(--spring-easing);
}

a:not(.nav-item):hover {
    color: var(--md-sys-color-tertiary);
}

a:not(.nav-item):hover::before {
    transform: scaleX(1);
    transform-origin: left;
    background: var(--md-sys-color-tertiary);
}

/* Sparkle Effect */
.sparkle {
    position: absolute;
    width: 20px;
    height: 20px;
    background: radial-gradient(circle at center,
        var(--md-sys-color-primary) 0%,
        var(--md-sys-color-secondary) 50%,
        transparent 100%
    );
    border-radius: 50%;
    pointer-events: none;
    z-index: 10;
    animation: sparkle 0.8s var(--spring-easing) forwards;
}

/* Enhanced Lists */
ul:not(.nav-items) li {
    position: relative;
    padding-left: 24px;
    margin: 8px 0;
    opacity: 0;
    transform: translateX(-20px);
    animation: listItemFadeIn 0.6s var(--spring-easing) forwards;
}

ul:not(.nav-items) li:nth-child(n) {
    animation-delay: calc(0.1s * var(--item-index, 0));
}

ul:not(.nav-items) li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--md-sys-color-primary);
    transition: all 0.3s var(--spring-easing);
}

ul:not(.nav-items) li:hover::before {
    transform: scale(1.5);
    color: var(--md-sys-color-tertiary);
}

@keyframes listItemFadeIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    50% {
        transform: translateX(5px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Enhanced Images */
img {
    transition: all 0.4s var(--spring-easing);
    border-radius: 12px;
}

img:hover {
    transform: scale(1.05);
    box-shadow: 
        0 8px 24px rgba(0,0,0,0.15),
        0 0 0 2px var(--md-sys-color-primary);
}

/* Page Transition Effects */
.page-transition {
    opacity: 0;
    transform: translateY(20px);
    animation: pageEnter 0.8s var(--spring-easing) forwards;
}

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}