/* ═══════════════════════════════════════════════════════════════════════════
   anthropic.style.css — Editorial, open, Anthropic-inspired theme for MDBlog.
   Builds on base.style.css design tokens via CSS variable overrides.
   ═══════════════════════════════════════════════════════════════════════════ */

@import "base.style.css";

/* ── Light Theme Variables ─────────────────────────────────────────────── */
:root {
    /* Palette */
    --color-bg:              #faf8f5;
    --color-surface:         #ffffff;
    --color-text:            #1c1c1c;
    --color-text-muted:      #6b6460;
    --color-text-light:      #4a4440;
    --color-heading:         #0d0d0d;
    --color-primary:         #c8501a;
    --color-primary-hover:   #a83e13;
    --color-border:          #e5dfd8;
    --color-code-bg:         #f2ede6;
    --color-code-text:       #a0320a;
    --color-code-block-text: #2a2420;
    --color-tag-bg:          #ede8e1;
    --color-quote-bg:        #f5f0e8;
    --color-muted-heading:   #a09890;
    --color-no-posts-code:   #0d0d0d;
    --color-no-posts-bg:     #ede8e1;

    /* Theme-specific extras */
    --color-card-bg:         #ffffff;
    --color-card-bg-hover:   #f5f0e8;
    --color-card-border:     #e5dfd8;
    --color-nav-active-bg:   #f0ebe3;

    /* Layout */
    --container-width:       880px;
    --body-font:             'Georgia', 'Times New Roman', serif;
    --ui-font:               -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --mono-font:             'SFMono-Regular', 'Consolas', 'Liberation Mono', 'Menlo', monospace;
    --base-font-size:        17px;
    --base-line-height:      1.65;
    --content-line-height:   1.8;
}

/* ── Dark Theme ────────────────────────────────────────────────────────── */
:root[data-theme="dark"] {
    --color-bg:              #141210;
    --color-surface:         #1e1b18;
    --color-text:            #e8e2db;
    --color-text-muted:      #9b948d;
    --color-text-light:      #c8c0b8;
    --color-heading:         #f5f0e8;
    --color-primary:         #e8753a;
    --color-primary-hover:   #f08050;
    --color-border:          #2e2924;
    --color-code-bg:         #252018;
    --color-code-text:       #e8753a;
    --color-code-block-text: #e0d8ce;
    --color-tag-bg:          #2e2924;
    --color-quote-bg:        #1e1b18;
    --color-muted-heading:   #5a5248;
    --color-no-posts-code:   #f5f0e8;
    --color-no-posts-bg:     #2e2924;
    --color-card-bg:         #1e1b18;
    --color-card-bg-hover:   #252018;
    --color-card-border:     #2e2924;
    --color-nav-active-bg:   #252018;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg:              #141210;
        --color-surface:         #1e1b18;
        --color-text:            #e8e2db;
        --color-text-muted:      #9b948d;
        --color-text-light:      #c8c0b8;
        --color-heading:         #f5f0e8;
        --color-primary:         #e8753a;
        --color-primary-hover:   #f08050;
        --color-border:          #2e2924;
        --color-code-bg:         #252018;
        --color-code-text:       #e8753a;
        --color-code-block-text: #e0d8ce;
        --color-tag-bg:          #2e2924;
        --color-quote-bg:        #1e1b18;
        --color-muted-heading:   #5a5248;
        --color-no-posts-code:   #f5f0e8;
        --color-no-posts-bg:     #2e2924;
        --color-card-bg:         #1e1b18;
        --color-card-bg-hover:   #252018;
        --color-card-border:     #2e2924;
        --color-nav-active-bg:   #252018;
    }
}

/* ── Body overrides ────────────────────────────────────────────────────── */
body {
    font-family: var(--body-font);
    font-size: var(--base-font-size);
    letter-spacing: -0.01em;
}

/* UI elements use sans-serif */
.site-menu,
.site-footer,
.post-meta,
.post-count,
.tag,
.read-more,
.back-to-home,
.pagination,
.category-card .post-count,
.category-card p,
.no-posts,
input,
button,
.blog-title small {
    font-family: var(--ui-font);
}

/* ── Navigation ────────────────────────────────────────────────────────── */
.site-menu {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2.5rem;
}

.site-menu .menu-links {
    text-align: center;
}

.site-menu a,
.site-menu button {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    margin: 0 0.15rem;
    color: var(--color-text-muted);
}

.site-menu a:hover,
.site-menu button:hover {
    background-color: var(--color-nav-active-bg);
    color: var(--color-heading);
}

.site-menu a:visited { color: var(--color-text-muted); }
.site-menu a:visited:hover { color: var(--color-heading); }

/* ── Blog Title / Home Header ──────────────────────────────────────────── */
.blog-title {
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2.5rem;
}

.blog-title h2 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-heading);
    margin: 0;
    line-height: 1.2;
}

.blog-title h2 small {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    font-style: italic;
    font-family: var(--ui-font);
}

/* ── Index blurb ───────────────────────────────────────────────────────── */
.index-content {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--color-text-light);
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

/* ── Category Cards ────────────────────────────────────────────────────── */
.category-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-top: 0;
}

.category-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 10px;
    padding: 1.5rem 1.75rem;
    text-decoration: none;
    color: var(--color-text);
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
    min-height: 130px;
}

.category-card:hover {
    background: var(--color-card-bg-hover);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.07);
    text-decoration: none;
    color: var(--color-text);
}

.category-card h3 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-heading);
    font-family: var(--ui-font);
    line-height: 1.3;
}

.category-card p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    flex: 1;
}

.category-card .post-count {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-primary);
}

/* ── Category Heading — matches .blog-title h2 ─────────────────────────── */
.category-title {
    font-family: var(--body-font);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-heading);
    line-height: 1.2;
    margin: 0;
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2.5rem;
}

.category-title small {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
    font-style: italic;
    font-family: var(--ui-font);
}

/* ── Post Preview Cards ─────────────────────────────────────────────────── */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.post-preview {
    display: flex;
    flex-direction: column;
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 10px;
    padding: 1.5rem 1.75rem;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

/* override base border-bottom — card border provides the separation */
.post-preview,
.post-preview:last-child {
    border-bottom: 1px solid var(--color-card-border);
}

.post-preview:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.07);
}

.post-title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 0.35rem;
    font-family: var(--ui-font);
}

.post-title a {
    color: var(--color-heading);
    transition: color 0.15s ease;
}

.post-title a:hover { color: var(--color-primary); }

.post-meta {
    margin: 0.3rem 0 0.6rem;
    font-size: 0.83rem;
    color: var(--color-text-muted);
    letter-spacing: 0.01em;
}

.post-excerpt {
    font-family: var(--body-font);
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--color-text-light);
    margin: 0 0 1rem;
    flex: 1;
}

.read-more {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-top: auto;
}

.read-more:hover { color: var(--color-primary-hover); text-decoration: none; }

@media (max-width: 720px) {
    .posts-grid { grid-template-columns: 1fr; }
}

/* ── Single Post ───────────────────────────────────────────────────────── */
.post-header {
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 2rem;
    margin-bottom: 2.5rem;
}

.post-header .post-title {
    font-family: var(--ui-font);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--color-heading);
    margin-bottom: 1rem;
}

.post-content {
    font-size: 1.075rem;
    line-height: var(--content-line-height);
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
    font-family: var(--ui-font);
    letter-spacing: -0.02em;
    margin-top: 2.5rem;
}

.post-content h2 { font-size: 1.65rem; }
.post-content h3 { font-size: 1.3rem; }

.post-content p { margin: 1.25rem 0; }

.post-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-thickness: 1px;
}

.post-content a:hover { color: var(--color-primary-hover); }

/* ── Tags ──────────────────────────────────────────────────────────────── */
.tag {
    background: var(--color-tag-bg);
    color: var(--color-text-muted);
    border-radius: 5px;
    font-size: 0.77rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
}

/* ── Back / Navigation button ──────────────────────────────────────────── */
.back-to-home {
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    padding: 0.6rem 1.25rem;
    transition: background 0.15s ease, color 0.15s ease;
}

.back-to-home:hover {
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
}

/* ── Pagination ────────────────────────────────────────────────────────── */
.pagination-link {
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pagination-link:hover {
    background: var(--color-primary);
    color: #fff;
}

/* ── Code ──────────────────────────────────────────────────────────────── */
pre {
    border-radius: 8px;
    border-left: 3px solid var(--color-primary);
}

/* ── Blockquote ────────────────────────────────────────────────────────── */
blockquote {
    border-left: 3px solid var(--color-primary);
    background: var(--color-quote-bg);
    border-radius: 0 6px 6px 0;
    font-style: italic;
    font-size: 1.05rem;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
    font-family: var(--ui-font);
    font-size: 0.85rem;
    letter-spacing: 0.01em;
}

/* ── Search form (search.html) ─────────────────────────────────────────── */
.search-header input[type="text"],
.standalone-search-form input[type="text"] {
    font-family: var(--ui-font) !important;
    background: var(--color-surface) !important;
    color: var(--color-text) !important;
    border: 1.5px solid var(--color-card-border) !important;
    border-radius: 8px !important;
    transition: border-color 0.15s ease !important;
}

.search-header input[type="text"]:focus,
.standalone-search-form input[type="text"]:focus {
    outline: none !important;
    border-color: var(--color-primary) !important;
}

.search-header button,
.standalone-search-form button {
    font-family: var(--ui-font) !important;
    background: var(--color-primary) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 8px !important;
    cursor: pointer !important;
    font-weight: 600 !important;
    transition: background 0.15s ease !important;
}

.search-header button:hover,
.standalone-search-form button:hover {
    background: var(--color-primary-hover) !important;
}

/* ── Responsive overrides ──────────────────────────────────────────────── */
@media (max-width: 768px) {
    .blog-title h2 { font-size: 1.75rem; }
    .post-header .post-title { font-size: 1.85rem; }
    .category-cards { grid-template-columns: 1fr; gap: 1rem; }
    .category-card { min-height: auto; }
}