:root {
    --primary-color: #10b981;
    --primary-hover: #059669;
    --secondary-color: #3b82f6;
    --accent-color: #8b5cf6;
    --warning-color: #f59e0b;
    --background: #1a3d32;
    --card-background: #2d5a4d;
    --text-primary: #ffffff;
    --text-secondary: #6ee7b7;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 10px 20px rgba(16, 185, 129, 0.5);
    --border-radius: 12px;
}

body {
    background-color: #1a3d32;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
        linear-gradient(135deg, #1a3d32 0%, #1f4a3d 50%, #2d5a4d 100%);
    background-attachment: fixed;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem 2rem;
    position: relative;
    z-index: 1;
}

.page-header {
    text-align: center;
    margin-bottom: 1rem;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-shadow: 0 3px 15px rgba(16, 185, 129, 0.6);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 0.5rem;
}

.nav-card {
    background: linear-gradient(145deg, #3a7066, #2d5a4d);
    border-radius: var(--border-radius);
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    border: 2px solid rgba(16, 185, 129, 0.4);
    position: relative;
    overflow: hidden;
}

.nav-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(16, 185, 129, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-card:hover::before {
    opacity: 1;
}

.nav-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.nav-card:nth-child(1) .card-icon {
    background: linear-gradient(135deg, #14f195, #059669);
    box-shadow: 0 6px 20px rgba(20, 241, 149, 0.5);
}

.nav-card:nth-child(2) .card-icon {
    background: linear-gradient(135deg, #60a5fa, #2563eb);
    box-shadow: 0 6px 20px rgba(96, 165, 250, 0.5);
}

.nav-card:nth-child(3) .card-icon {
    background: linear-gradient(135deg, #a78bfa, #7c3aed);
    box-shadow: 0 6px 20px rgba(167, 139, 250, 0.5);
}

.nav-card:nth-child(4) .card-icon {
    background: linear-gradient(135deg, #fbbf24, #d97706);
    box-shadow: 0 6px 20px rgba(251, 191, 36, 0.5);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav-card:hover .card-icon {
    transform: scale(1.15) rotate(5deg);
}

.nav-card:nth-child(1):hover .card-icon {
    box-shadow: 0 8px 30px rgba(20, 241, 149, 0.7);
}

.nav-card:nth-child(2):hover .card-icon {
    box-shadow: 0 8px 30px rgba(96, 165, 250, 0.7);
}

.nav-card:nth-child(3):hover .card-icon {
    box-shadow: 0 8px 30px rgba(167, 139, 250, 0.7);
}

.nav-card:nth-child(4):hover .card-icon {
    box-shadow: 0 8px 30px rgba(251, 191, 36, 0.7);
}

.card-icon svg {
    width: 40px;
    height: 40px;
    stroke: white;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.card-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
    font-weight: 500;
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
    }

    .container {
        padding: 0.75rem 1rem 1rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .nav-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        margin-top: 0.5rem;
    }

    .nav-card {
        background: linear-gradient(145deg, #3a7066, #2d5a4d);
        padding: 0.75rem;
    }

    .card-icon {
        width: 60px;
        height: 60px;
        margin: 0 auto 1rem;
    }

    .card-icon svg {
        width: 30px;
        height: 30px;
    }

    .card-title {
        font-size: 1.125rem;
    }

    .card-description {
        font-size: 0.875rem;
    }
}