:root {
    --bg-primary: #0f0f15;
    --bg-secondary: #1a1a25;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b0;
    --card-bg: rgba(30, 30, 45, 0.6);
    --border-color: rgba(99, 102, 241, 0.2);
}

.light-theme {
    --bg-primary: #f8f9ff;
    --bg-secondary: #eef1ff;
    --accent-primary: #4f46e5;
    --accent-secondary: #7c3aed;
    --text-primary: #1a1a25;
    --text-secondary: #55556d;
    --card-bg: rgba(255, 255, 255, 0.8);
    --border-color: rgba(79, 70, 229, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.background-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.3;
    mix-blend-mode: screen;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -200px;
    left: -200px;
    animation: float 15s infinite ease-in-out;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-secondary);
    bottom: -150px;
    right: -150px;
    animation: float 18s infinite ease-in-out reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: #ec4899;
    top: 50%;
    left: 20%;
    animation: float 12s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(-20px, 20px) rotate(5deg); }
    50% { transform: translate(20px, -20px) rotate(-5deg); }
    75% { transform: translate(10px, 10px) rotate(3deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.theme-toggle-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-icon {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    width: 60px;
    height: 30px;
    position: relative;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.toggle-handle {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 24px;
    height: 24px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.light-theme .toggle-handle {
    transform: translateX(30px);
}

main {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1rem 0;
}

.hero-content {
    max-width: 800px;
    padding: 2.5rem;
    background: var(--card-bg);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(20px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    margin-bottom: 2rem;
}

h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.highlight {
    color: var(--accent-primary);
    font-weight: 500;
}

section {
    margin: 3rem 0;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    margin: 0.5rem auto;
    border-radius: 3px;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.2rem;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    transform: translateY(-3px);
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.2rem;
    }
    
    .hero-content {
        padding: 2rem 1.5rem;
    }
    
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    main {
        min-height: 50vh;
    }
}