:root {
    --forest-deep-green: #0B2418;
    --oxygen-blue: #00F5FF;
    --peat-brown: #3E2A1F;
    --lichen-green: #ADFF2F;
    --text-light: #F0F5F2;
}

body {
    background-color: var(--forest-deep-green);
    color: var(--text-light);
    font-family: 'Inter', 'Noto Sans TC', sans-serif;
    overflow-x: hidden;
    animation: photosynthesis-breathing 5s infinite ease-in-out;
}

@keyframes photosynthesis-breathing {
    0%, 100% { background-color: #0B2418; }
    50% { background-color: #0D2D1E; }
}

.navbar {
    background-color: rgba(11, 36, 24, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--peat-brown);
}

.navbar-brand, .nav-link {
    color: var(--text-light) !important;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.nav-link:hover {
    color: var(--oxygen-blue) !important;
}

.btn-primary {
    background-color: var(--peat-brown);
    border: 1px solid var(--oxygen-blue);
    color: var(--oxygen-blue);
    transition: all 0.3s ease;
    box-shadow: 0 0 5px rgba(0, 245, 255, 0.2);
}

.btn-primary:hover {
    background-color: var(--oxygen-blue);
    color: var(--forest-deep-green);
    box-shadow: 0 0 15px var(--oxygen-blue);
}

.btn-primary:active {
    transform: scale(0.98);
    background-color: var(--lichen-green);
}

.card {
    background-color: rgba(62, 42, 31, 0.2);
    border: 1px solid var(--peat-brown);
    color: var(--text-light);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    border-color: var(--oxygen-blue);
    transform: translateY(-5px);
}

.section-title {
    color: var(--oxygen-blue);
    border-left: 4px solid var(--lichen-green);
    padding-left: 15px;
    margin-bottom: 30px;
}

.footer {
    background-color: var(--peat-brown);
    padding: 50px 0;
    margin-top: 100px;
    border-top: 2px solid var(--oxygen-blue);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--forest-deep-green);
}
::-webkit-scrollbar-thumb {
    background: var(--peat-brown);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--oxygen-blue);
}