:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --background-color: #ffffff;
    --card-background: #ffffff;
    --text-color: #333333;
    --border-color: rgba(0,0,0,0.125);
    --section-bg: #f8f9fa;
    --navbar-bg: #ffffff;
    --navbar-text: #333333;
    --footer-bg: #f8f9fa;
    --footer-text: #333333;

    --shadow: 0 4px 8px rgba(0,0,0,0.1);
    --hover-shadow: 0 8px 16px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --background-color: #121212;
    --card-background: #1e1e1e;
    --text-color: #e0e0e0;
    --border-color: rgba(255,255,255,0.1);
    --section-bg: #181818;
    --navbar-bg: #1e1e1e;
    --navbar-text: #e0e0e0;
    --footer-bg: #1e1e1e;
    --footer-text: #e0e0e0;

    --shadow: 0 4px 8px rgba(0,0,0,0.3);
    --hover-shadow: 0 8px 16px rgba(0,0,0,0.4);
}

body {
    padding-top: 56px;
    color: var(--text-color);
    background-color: var(--background-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    scroll-behavior: smooth;
}

.bg-section {
    background-color: var(--section-bg);
}

/* Navbar */
.navbar {
    background-color: var(--navbar-bg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.navbar-brand {
    font-weight: bold;
    color: var(--navbar-text) !important;
}

.nav-link {
    color: var(--navbar-text) !important;
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover:after {
    width: 100%;
}

/* Header */
header {
    background: linear-gradient(135deg, #4285f4, #34a853);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Theme Toggle */
.theme-toggle-wrapper {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle {
    background-color: var(--card-background);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    box-shadow: var(--shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: rotate(30deg);
    box-shadow: var(--hover-shadow);
}

.theme-toggle .fa-sun {
    display: none;
    color: #ff9800;
}

.theme-toggle .fa-moon {
    display: block;
    color: #3f51b5;
}

[data-theme="dark"] .theme-toggle .fa-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .fa-moon {
    display: none;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    box-shadow: var(--shadow);
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    transition: var(--transition);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

/* Cards */
.card {
    background-color: var(--card-background);
    border-color: var(--border-color);
    color: var(--text-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    border-radius: 10px;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.card-title {
    color: var(--text-color);
    font-weight: 600;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.card-title:after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    bottom: -8px;
    left: 0;
}

/* Stats */
.stats-card {
    text-align: center;
    padding: 10px;
}

.counter {
    font-size: 3rem;
    font-weight: 700;
    margin: 10px 0;
    color: var(--primary-color);
}

/* Animation containers */
#threejs-container, 
#p5-container, 
#rough-container {
    position: relative;
    overflow: hidden;
    border-radius: 5px;
    background-color: #f5f5f5;
}

[data-theme="dark"] #threejs-container,
[data-theme="dark"] #p5-container,
[data-theme="dark"] #rough-container {
    background-color: #2c2c2c;
}

#map {
    border-radius: 5px;
    z-index: 1;
}

/* Swiper */
.swiper {
    height: 250px;
}

.swiper-slide {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    font-weight: bold;
    border-radius: 8px;
}

/* Anime-js and GSAP */
#anime-js-demo {
    background-color: var(--section-bg);
    position: relative;
    border-radius: 5px;
    overflow: hidden;
}

.anime-square {
    width: 30px;
    height: 30px;
    background-color: #FE4A49;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

#gsap-demo {
    background-color: var(--section-bg);
}

.gsap-box {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 20px;
}

/* Calendar */
#calendar {
    height: 400px;
}

/* Particles */
.particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* Sortable */
.sortable-list {
    min-height: 200px;
}

.sortable-item {
    cursor: grab;
    margin-bottom: 8px;
    transition: var(--transition);
}

.sortable-item:active {
    cursor: grabbing;
}

.sortable-ghost {
    opacity: 0.4;
}

/* Editor */
#editor {
    min-height: 150px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 10px;
}

/* Footer */
footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 30px 0;
}

.library-icons i {
    transition: var(--transition);
    color: var(--text-color);
}

.library-icons i:hover {
    transform: scale(1.2);
    color: var(--primary-color);
}

/* Buttons */
.btn {
    border-radius: 6px;
    padding: 8px 20px;
    transition: var(--transition);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Media queries */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    
    .counter {
        font-size: 2rem;
    }
    
    #calendar {
        height: 350px;
    }
    
    .theme-toggle-wrapper {
        top: 70px;
        right: 10px;
    }
    
    .theme-toggle, .back-to-top {
        width: 40px;
        height: 40px;
    }
}