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

body {
    font-family: Georgia, 'Times New Roman', serif;
    background: #f5f7f0;
    color: #2d3319;
    line-height: 1.75;
    padding: 0;
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem 3rem;
}

/* Header */
header {
    background: #3d5a1e;
    color: #e8ecd8;
    padding: 1.2rem 2rem;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.6rem;
    font-weight: normal;
    letter-spacing: 0.02em;
}

header h1 a {
    color: #e8ecd8;
    text-decoration: none;
}

header h1 a:hover {
    color: #fff;
}

header .subtitle {
    font-size: 0.85rem;
    color: #b8c6a0;
    margin-top: 0.2rem;
}

/* Navigation */
nav {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.6rem;
}

nav a {
    color: #c5d4a8;
    text-decoration: none;
    font-size: 0.9rem;
}

nav a:hover, nav a.active {
    color: #fff;
}

/* Content */
h2 {
    color: #3d5a1e;
    font-size: 1.5rem;
    margin: 2rem 0 0.5rem;
    padding-bottom: 0.3rem;
    border-bottom: 2px solid #c5d4a8;
}

h3 {
    color: #4a6b23;
    font-size: 1.2rem;
    margin: 1.5rem 0 0.4rem;
}

h4, h5, h6 {
    color: #5a7a33;
    margin: 1rem 0 0.3rem;
}

a { color: #3d5a1e; }
a:hover { color: #2a3f14; text-decoration: underline; }

p { margin: 0.8rem 0; }

ul, ol { margin: 0.5rem 0 0.5rem 1.8rem; }
li { margin: 0.3rem 0; }

blockquote {
    border-left: 4px solid #c5d4a8;
    padding: 0.8rem 1.2rem;
    margin: 1rem 0;
    background: #eef2e4;
    font-style: italic;
}

.bumper-sticker {
    font-size: 1.1rem;
    color: #3d5a1e;
    font-weight: bold;
    font-style: normal;
    text-align: center;
    padding: 1rem;
    background: #e3ebd3;
    border-left: 4px solid #7a9a4a;
}

.template-field {
    margin: 0.5rem 0;
    padding: 0.4rem 0;
}

.intro-text {
    margin: 1rem 0;
    font-size: 1.05rem;
    line-height: 1.8;
}

.task {
    margin: 0.4rem 0;
    padding: 0.3rem 0.8rem;
    background: #f0f4e6;
    border-radius: 4px;
}

.metric-info, .research {
    margin: 0.8rem 0;
    padding: 0.5rem 0;
    border-top: 1px solid #dde5cc;
}

.body-content {
    margin: 1rem 0;
}

.image-ref {
    color: #888;
    font-style: italic;
    font-size: 0.9rem;
}

/* Page card */
.page-card {
    background: #fff;
    border: 1px solid #dde5cc;
    border-radius: 6px;
    padding: 1.5rem;
    margin: 1rem 0;
}

/* Category sections on index */
.category-section {
    margin: 2rem 0;
}

.category-section h3 {
    color: #3d5a1e;
    border-bottom: 1px solid #dde5cc;
    padding-bottom: 0.2rem;
}

.page-list {
    list-style: none;
    margin: 0.5rem 0;
    padding: 0;
    columns: 2;
    column-gap: 2rem;
}

.page-list li {
    padding: 0.2rem 0;
    break-inside: avoid;
}

.page-list li a {
    text-decoration: none;
}

.page-list li a:hover {
    text-decoration: underline;
}

.page-list .size {
    color: #999;
    font-size: 0.8rem;
}

/* Back link */
.back {
    margin-top: 2.5rem;
    padding-top: 1rem;
    border-top: 1px solid #dde5cc;
}

/* Footer */
footer {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid #dde5cc;
    font-size: 0.8rem;
    color: #999;
    text-align: center;
}

/* Table */
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { border: 1px solid #dde5cc; padding: 0.5rem 0.8rem; text-align: left; }
th { background: #eef2e4; color: #3d5a1e; }

pre, code {
    background: #eef2e4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9rem;
}

pre { padding: 1rem; overflow-x: auto; }

img { max-width: 100%; }

/* Tabs for content wiki Home/Science/History */
.tab-links {
    display: flex;
    gap: 0;
    margin: 1rem 0 0;
    border-bottom: 2px solid #c5d4a8;
}

.tab-links a {
    padding: 0.5rem 1.2rem;
    text-decoration: none;
    color: #666;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 4px 4px 0 0;
    margin-bottom: -2px;
}

.tab-links a:hover {
    background: #f0f4e6;
    color: #3d5a1e;
}

.tab-links a.active {
    background: #fff;
    color: #3d5a1e;
    border-color: #c5d4a8;
    font-weight: bold;
}

/* Responsive */
@media (max-width: 600px) {
    .container { padding: 0 1rem 2rem; }
    header { padding: 1rem; }
    header h1 { font-size: 1.3rem; }
    .page-list { columns: 1; }
    nav { flex-wrap: wrap; gap: 0.8rem; }
}