:root {
    --bg:       #f5f2ec;
    --bg-alt:   #edeae2;
    --ink:      #1c1a17;
    --ink-mid:  #4a4640;
    --ink-soft: #8a847a;
    --accent:   #7a5c3a;
    --rule:     #d4cfc7;
    --font-body: Georgia, 'Times New Roman', Times, serif;
    --font-mono:  'Courier New', 'Lucida Sans Typewriter', monospace;
}

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

html {
    font-size: 17px;
}

body {
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--font-body);
    line-height: 1.75;
    max-width: 680px;
    margin: 0 auto;
    padding: 3rem 1.5rem 5rem;
}

/* ── Navigation ── */
nav {
    display: flex;
    gap: 1.4rem;
    align-items: baseline;
    margin-bottom: 3.5rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
}

nav a {
    color: var(--ink-soft);
    text-decoration: none;
    transition: color 0.15s;
}

nav a:hover,
nav a.active {
    color: var(--accent);
}

nav .site-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ink);
    margin-right: auto;
    letter-spacing: 0.02em;
}

/* ── Typography ── */
h1 {
    font-family: var(--font-body);
    font-size: 1.7rem;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.25;
    margin-bottom: 1.2rem;
    letter-spacing: -0.01em;
}

h2 {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 2.5rem 0 0.9rem;
    border: none;
    padding: 0;
}

h3 {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    margin: 1.5rem 0 0.5rem;
}

p {
    color: var(--ink-mid);
    margin-bottom: 1rem;
}

a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: transparent;
    transition: text-decoration-color 0.2s, color 0.2s;
}

a:hover {
    text-decoration-color: var(--accent);
}

hr {
    border: none;
    border-top: 1px solid var(--rule);
    margin: 2.5rem 0;
}

ul {
    list-style: none;
    padding: 0;
}

ul li {
    padding: 0.25rem 0;
    color: var(--ink-mid);
}

small, .footer {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
    margin-top: 4rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
    text-align: center;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--bg-alt);
    color: var(--ink-mid);
    padding: 2px 5px;
    border-radius: 2px;
}

/* ── Index specific ── */
.index-intro {
    margin-bottom: 3rem;
}

.index-intro p {
    font-size: 1rem;
    color: var(--ink-mid);
    font-style: italic;
}

.nav-list {
    list-style: none;
    padding: 0;
}

.nav-list li {
    border-top: 1px solid var(--rule);
    padding: 0;
}

.nav-list li:last-child {
    border-bottom: 1px solid var(--rule);
}

.nav-list a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.75rem 0;
    color: var(--ink);
    text-decoration: none;
    gap: 1rem;
}

.nav-list a:hover .nav-label {
    color: var(--accent);
}

.nav-label {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.15s;
}

.nav-desc {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
    letter-spacing: 0.02em;
}

.index-photo {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 50%;
    filter: grayscale(20%) sepia(10%);
    margin-bottom: 2rem;
    border: 1px solid var(--rule);
}

/* ── About specific ── */
.contact-list li {
    display: flex;
    gap: 0.6rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--ink-mid);
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--rule);
}

.contact-list li:first-child {
    border-top: 1px solid var(--rule);
}

.contact-label {
    color: var(--ink-soft);
    min-width: 110px;
}

.uses-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.3rem 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

.uses-key {
    color: var(--ink-soft);
}

.uses-val {
    color: var(--ink-mid);
}

/* ── Books specific ── */
.year-group {
    margin-bottom: 2rem;
}

.year-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
    letter-spacing: 0.1em;
    margin-bottom: 0.6rem;
    text-transform: uppercase;
}

.book-entry {
    display: block;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--rule);
    font-size: 0.95rem;
    color: var(--ink);
    text-decoration: none;
}

.book-author {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-soft);
    margin-left: 0.5rem;
}

/* ── Birding specific ── */
.birding-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--rule);
}

.birding-count {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
}

.bird-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 2.5rem;
}

.bird-col {
    list-style: none;
}

.bird-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--rule);
    text-decoration: none;
    color: inherit;
}

.bird-item:hover .bird-common {
    color: var(--accent);
}

.bird-thumb {
    width: 44px;
    height: 44px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--rule);
    flex-shrink: 0;
    filter: sepia(8%);
}

.bird-common {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--ink);
    transition: color 0.15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bird-latin {
    font-family: var(--font-body);
    font-style: italic;
    font-size: 0.75rem;
    color: var(--ink-soft);
}

.bird-date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--ink-soft);
    margin-left: auto;
    flex-shrink: 0;
}

.birding-footer {
    margin-top: 2rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--ink-soft);
}

@media (max-width: 540px) {
    .bird-grid {
        grid-template-columns: 1fr;
    }
    nav {
        gap: 1rem;
    }
}