:root {
    --bg-light: #f3e8ff;
    --bg-dark: #111827;
    --text-light: #1f2937;
    --text-dark: #e5e7eb;
    --primary-light: #8b5cf6;
    --primary-dark: #a78bfa;
    --secondary-light: #ec4899;
    --secondary-dark: #f472b6;
    --glass-bg-light: rgba(255, 255, 255, 0.2);
    --glass-bg-dark: rgba(31, 41, 55, 0.2);
    --glass-border-light: rgba(255, 255, 255, 0.4);
    --glass-border-dark: rgba(255, 255, 255, 0.1);
    --shadow-light: rgba(139, 92, 246, 0.2);
    --shadow-dark: rgba(167, 139, 250, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-light);
    transition: background-color 0.5s ease, color 0.5s ease;
    overflow-x: hidden;
}

body.dark {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

#bg-blurs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: var(--bg-light);
    transition: background 0.5s ease;
}

body.dark #bg-blurs {
     background: var(--bg-dark);
}

.blur-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: move 20s infinite alternate;
}

.blur-orb-1 {
    width: 500px;
    height: 500px;
    top: -150px;
    left: -150px;
    background: var(--primary-light);
}

.blur-orb-2 {
    width: 400px;
    height: 400px;
    bottom: -200px;
    right: -200px;
    background: var(--secondary-light);
    animation-delay: 5s;
}

body.dark .blur-orb-1 { background: var(--primary-dark); }
body.dark .blur-orb-2 { background: var(--secondary-dark); }


@keyframes move {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(100px, 150px) scale(1.2); }
    100% { transform: translate(-50px, -100px) scale(1); }
}

#preloader {
    position: fixed;
    inset: 0;
    background-color: var(--bg-light);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    transition-delay: 0.5s;
}

body.dark #preloader { background-color: var(--bg-dark); }

#preloader.loaded {
    opacity: 0;
    visibility: hidden;
}

#preloader .loader-icon {
    width: 64px;
    height: 64px;
    animation: pulse 1.5s infinite ease-in-out;
    color: var(--primary-light);
    stroke-width: 1.5px;
}
body.dark #preloader .loader-icon { color: var(--primary-dark); }


@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.glass-effect {
    background: var(--glass-bg-light);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border-light);
    box-shadow: 0 8px 32px 0 var(--shadow-light);
    transition: background 0.5s ease, border 0.5s ease, box-shadow 0.5s ease;
}

body.dark .glass-effect {
    background: var(--glass-bg-dark);
    border-color: var(--glass-border-dark);
    box-shadow: 0 8px 32px 0 var(--shadow-dark);
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
    border-radius: 4px;
}
body.dark ::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

#mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 40;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

#mobile-nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

#mobile-nav-overlay .nav-item {
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

#mobile-nav-overlay.open .nav-item {
    transform: translateY(0);
    opacity: 1;
}

.card-3d {
    transform-style: preserve-3d;
    transition: transform 0.4s ease;
}
.card-3d-content {
    transform: translateZ(20px);
}
.card-3d:hover {
    transform: perspective(1000px) rotateX(var(--rotateX, 0)) rotateY(var(--rotateY, 0)) scale3d(1.05, 1.05, 1.05);
}

#lightbox {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
#lightbox.open {
    opacity: 1;
    visibility: visible;
}
#lightbox img {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: 1rem;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}
#lightbox.open img {
    transform: scale(1);
}