:root {
    --max-width: 45rem;
    --text-color: #1a1a1a;
    --link-color: #1a0dab;
    --link-visited: #660099;
    --bg-color: #ffffff;
    --subtle-color: #555;
    --border-color: #e0e0e0;
}

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

body {
    font-family: 'Times New Roman', Times, serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.site-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-name {
    font-family: 'Times New Roman', Times, serif;
    font-size: 1.25rem;
    color: var(--text-color);
    text-decoration: none;
}

.site-name:visited {
    color: var(--text-color);
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 0.95rem;
}

.main-nav a {
    color: var(--subtle-color);
    text-decoration: none;
}

.main-nav a:visited {
    color: var(--subtle-color);
}

.main-nav a:hover {
    color: var(--text-color);
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    padding: 0.25rem;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background: var(--text-color);
    height: 2px;
    width: 1.25rem;
    border-radius: 1px;
    position: relative;
    transition: all 0.2s ease;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    top: -6px;
}

.nav-toggle-label span::after {
    top: 6px;
}

.nav-toggle:checked + .nav-toggle-label span {
    background: transparent;
}

.nav-toggle:checked + .nav-toggle-label span::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle:checked + .nav-toggle-label span::after {
    top: 0;
    transform: rotate(-45deg);
}

@media (max-width: 600px) {
    .nav-toggle-label {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-color);
        border-bottom: 1px solid var(--border-color);
        padding: 0 1rem;
        gap: 1rem;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.2s ease, padding 0.2s ease;
    }

    .nav-toggle:checked ~ .main-nav {
        max-height: 200px;
        padding: 1rem;
    }

    .header-inner {
        position: relative;
    }
}

#content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1rem;
}

.title {
    display: none;
}

#content h1, #content h2, #content h3 {
    font-family: 'Times New Roman', Times, serif;
    font-weight: normal;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

#content h1 { font-size: 1.6rem; }
#content h2 { font-size: 1.3rem; }
#content h3 { font-size: 1.1rem; }

p {
    margin-bottom: 0.8em;
}

a {
    color: var(--link-color);
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:visited {
    color: var(--link-visited);
}

a:hover {
    text-decoration: none;
}

ul, ol {
    margin-bottom: 0.8em;
    padding-left: 1.5em;
}

li {
    margin-bottom: 0.2em;
}

code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    background-color: #f5f5f5;
    padding: 0.1em 0.3em;
    border-radius: 2px;
}

pre {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    line-height: 1.5;
    background-color: #f5f5f5;
    padding: 1em;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    margin-bottom: 0.8em;
    white-space: pre;
}

pre span {
    color: inherit;
}

pre code {
    background: none;
    padding: 0;
    border-radius: 0;
}

#content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1em auto;
    border: 1px solid var(--border-color);
    border-radius: 2px;
}

blockquote {
    border-left: 2px solid var(--border-color);
    margin: 1em 0;
    padding: 0.5em 1em;
    color: var(--subtle-color);
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2em 0;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 0.8em;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 0.4em 0.8em;
    text-align: left;
}

th {
    font-weight: normal;
    background-color: #f9f9f9;
}

#postamble {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--subtle-color);
    border-top: 1px solid var(--border-color);
}

#postamble .author,
#postamble .date {
    display: inline;
}

#postamble .date::before {
    content: " | ";
}

.main-nav a.active {
    color: var(--text-color);
    font-weight: 500;
}

.posts-page {
    padding-bottom: 2rem;
}

.posts-page h1 {
    font-size: 1.6rem;
    margin-bottom: 0.3em;
    margin-top: 0;
}

.posts-intro {
    color: var(--subtle-color);
    margin-bottom: 2rem;
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.post-card {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

.post-card:last-child {
    border-bottom: none;
}

.post-card-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.3rem;
}

.post-card h2 {
    font-size: 1.15rem;
    margin: 0;
    font-family: 'Times New Roman', Times, serif;
    font-weight: normal;
}

.post-card h2 a {
    color: var(--text-color);
    text-decoration: none;
}

.post-card h2 a:hover {
    text-decoration: underline;
}

.post-card time {
    font-size: 0.85rem;
    color: var(--subtle-color);
    white-space: nowrap;
    font-family: 'Helvetica', 'Arial', sans-serif;
}

.post-card > p {
    color: var(--subtle-color);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.post-tag {
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 0.75rem;
    color: var(--subtle-color);
    background-color: #f5f5f5;
    padding: 0.15em 0.5em;
    border-radius: 2px;
}

.page-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    padding: 1rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
}

.page-header .header-posts-link {
    color: var(--subtle-color);
    font-family: 'Helvetica', 'Arial', sans-serif;
    font-size: 0.9rem;
}

.page-header .header-posts-link:hover {
    color: var(--text-color);
}

.share-buttons {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.share-buttons-label {
    font-size: 0.85rem;
    color: var(--subtle-color);
    font-family: 'Helvetica', 'Arial', sans-serif;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3em 0.7em;
    font-size: 0.8rem;
    font-family: 'Helvetica', 'Arial', sans-serif;
    color: var(--subtle-color);
    background: #f5f5f5;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    text-decoration: none;
    cursor: pointer;
}

.share-btn:hover {
    background: #eee;
    color: var(--text-color);
}

.share-btn svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.share-btn.copied {
    background: #e8f5e9;
    color: #2e7d32;
    border-color: #a5d6a7;
}

.page-content {
    padding-bottom: 2rem;
}

.page-content .portal-banner h1 {
    font-size: 1.6rem;
    margin-top: 0;
    margin-bottom: 0.3em;
}

.page-content .portal-banner p {
    color: var(--subtle-color);
    margin-bottom: 1.5rem;
}

.page-content .portal-box {
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.page-content .portal-box-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    background: #f9f9f9;
}

.page-content .portal-box-header h2 {
    font-size: 1.1rem;
    margin: 0;
    font-family: 'Times New Roman', Times, serif;
    font-weight: normal;
}

.page-content .portal-box-content {
    padding: 0;
}

.uses-table-wrap {
    margin-top: 0;
}

.uses-table {
    width: 100%;
    border-collapse: collapse;
}

.uses-table th,
.uses-table td {
    border: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0.6rem 1rem;
    text-align: left;
    vertical-align: middle;
    background: none;
}

.uses-table tr:last-child td {
    border-bottom: none;
}

.uses-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.uses-logo {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 2px;
}

.uses-text-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: #f0f0f0;
    border-radius: 2px;
    font-size: 0.7rem;
    font-family: 'Helvetica', 'Arial', sans-serif;
    color: var(--subtle-color);
    font-weight: 500;
}

.uses-table td:nth-child(2) {
    font-weight: 500;
    white-space: nowrap;
}

.uses-table td:nth-child(3) {
    color: var(--subtle-color);
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .post-card-header {
        flex-direction: column;
        gap: 0.2rem;
    }

    .share-buttons {
        gap: 0.5rem;
    }

    .uses-table td:nth-child(3) {
        display: none;
    }
}