:root {
    --primary-color: #4a90e2;
    --secondary-color: #f39c12;
    --bg-color: #ffffff;
    --text-color: #333333;
    --card-bg: #f5f5f5;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --card-bg: #2d2d2d;
    --shadow-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
    padding: 10px;
    border-radius: 50%;
    transition: transform var(--transition-speed);
}

.theme-toggle button:hover {
    transform: scale(1.1);
}

.hero {
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.art-container {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.circle, .square, .triangle {
    position: absolute;
    opacity: 0.1;
}

.circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--primary-color);
    top: 20%;
    left: 20%;
}

.square {
    width: 150px;
    height: 150px;
    background: var(--secondary-color);
    top: 40%;
    right: 25%;
    transform: rotate(45deg);
}

.triangle {
    width: 0;
    height: 0;
    border-left: 100px solid transparent;
    border-right: 100px solid transparent;
    border-bottom: 173px solid var(--primary-color);
    top: 30%;
    left: 50%;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.hero p {
    font-size: 1.5rem;
    position: relative;
    z-index: 1;
}

.roles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.role-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.role-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.role-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.role-card h3 {
    margin-bottom: 0.5rem;
}

footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--shadow-color);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .roles-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
}