:root {
    --text-color: #1f2937;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --primary-color: #3b82f6;
    --hover-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --base-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.back-nav {
    position: absolute;
    top: 2rem;
    left: 2rem;
}

.back-link {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    transition: opacity 0.2s;
}

.back-link:hover {
    opacity: 0.8;
}

h1 {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 3rem;
    letter-spacing: -0.025em;
    color: #111827;
}

.card-container {
    display: flex;
    gap: 2rem;
    padding: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 3rem 2rem;
    width: 280px;
    height: 180px;
    text-align: center;
    box-shadow: var(--base-shadow);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: #111827;
}

.card-description {
    margin-top: 0.5rem;
    color: #6b7280;
    font-size: 0.875rem;
}