:root {
    --bg-color: #ffffff;
    --text-main: #222222;
    --text-muted: #555555;
    --accent-green: #2e7d32;
    --accent-hover: #1b5e20;
    --border-light: #e0e0e0;
    --bg-light: #f9f9f9;
}

/* SEO/UX: Smooth scrolling for anchor links */
html {
    scroll-behavior: smooth;
    /* Prevents sticky header from overlapping section titles */
    scroll-padding-top: 100px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: var(--text-main);
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; margin-top: 2rem; }
h2 { font-size: 1.8rem; border-bottom: 2px solid var(--border-light); padding-bottom: 0.5rem; margin-top: 2.5rem; }
h3 { font-size: 1.3rem; color: var(--accent-green); }
p { margin-bottom: 1.2rem; }
a { color: var(--accent-green); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }

header {
    border-bottom: 1px solid var(--border-light);
    padding: 1.5rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo { font-size: 1.5rem; font-weight: 700; color: var(--text-main); }
.logo span { color: var(--accent-green); }

nav ul { list-style: none; display: flex; gap: 1.5rem; }
nav a { color: var(--text-main); font-weight: 500; }
nav a:hover { color: var(--accent-green); }

.btn {
    display: inline-block;
    background-color: var(--accent-green);
    color: #ffffff !important;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 600;
    transition: 0.2s;
}

.btn:hover { background-color: var(--accent-hover); text-decoration: none; }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    border: 1px solid var(--border-light);
    padding: 1.5rem;
    border-radius: 4px;
    background: var(--bg-color);
    transition: transform 0.2s ease;
}

.card:hover { border-color: var(--accent-green); }
.card p { font-size: 0.95rem; color: var(--text-muted); }

.category-nav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.5rem 0; }
.category-tag {
    background: var(--bg-light);
    border: 1px solid var(--border-light);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-main);
    transition: 0.2s;
}

.category-tag:hover { background: var(--accent-green); color: white !important; }

.listing-meta { margin: 1rem 0; font-size: 0.85rem; color: #666; }
.listing-meta span { display: block; margin-bottom: 0.2rem; }

table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.9rem; }
th, td { padding: 12px; border: 1px solid var(--border-light); text-align: left; }
th { background: var(--bg-light); }

footer {
    border-top: 1px solid var(--border-light);
    padding: 3rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

@media (max-width: 600px) {
    .nav-container { flex-direction: column; gap: 1rem; }
    h1 { font-size: 1.8rem; }
}