/* blog.css
 * Shared styles for the Substack-style blogpost engine (feed + post pages).
 * Used by /misc today; written so it can be reused by /blog (Notes) later.
 * Colors are opacity-based (rgba(0,0,0,x)) so they work unchanged under
 * both body.day-mode and body.night-mode defined in main.css.
 */

/* ---------- Feed ---------- */
.feed {
	margin-top: 24px;
	margin-bottom: 40px;
}

.feed-filters {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
	margin-bottom: 12px;
}

.filter-btn {
	appearance: none;
	font: inherit;
	font-size: 12px;
	padding: 2px 10px;
	color: rgba(0, 0, 0, 0.75);
	background: transparent;
	border: 1px solid rgba(0, 0, 0, 0.15);
	border-radius: 999px;
	cursor: pointer;
	transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.filter-btn:hover {
	background: rgba(0, 0, 0, 0.05);
	border-color: rgba(0, 0, 0, 0.3);
}

.filter-btn.active {
	color: #fff;
	background: var(--tag-color, rgba(0, 0, 0, 0.75));
	border-color: var(--tag-color, rgba(0, 0, 0, 0.75));
}

.feed-list {
	list-style: none;
	padding: 0;
	margin: 0;
}

.feed-row {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 16px;
	padding: 10px 0;
	border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.feed-row:first-child {
	border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.feed-row-left {
	display: flex;
	flex-direction: column;
	gap: 2px;
	flex: 1;
	min-width: 0;
}

.feed-row-title {
	font-weight: 500;
}

.feed-row-subtitle {
	font-size: 13px;
	line-height: 1.4;
	color: rgba(0, 0, 0, 0.55);
}

.feed-row-meta {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	gap: 4px;
	font-size: 13px;
	color: rgba(0, 0, 0, 0.55);
	white-space: nowrap;
}

.feed-row-tags {
	display: flex;
	flex-wrap: wrap;
	justify-content: flex-end;
	gap: 4px;
}

.tag {
	display: inline-block;
	font-size: 11px;
	font-weight: 500;
	line-height: 1.6;
	padding: 0 7px;
	border-radius: 999px;
	color: var(--tag-color, rgba(0, 0, 0, 0.7));
	background: rgba(0, 0, 0, 0.07);
}

/* Tag palette, assigned per tag name by tagColorClass() in blogEngine.js. */
.tag-c0 { --tag-color: #9a5b13; }
.tag-c1 { --tag-color: #2f5d8a; }
.tag-c2 { --tag-color: #3f6b3a; }
.tag-c3 { --tag-color: #7a4a78; }
.tag-c4 { --tag-color: #a23b3b; }
.tag-c5 { --tag-color: #2e6f6a; }
.tag.tag-c0 { background: rgba(154, 91, 19, 0.12); }
.tag.tag-c1 { background: rgba(47, 93, 138, 0.12); }
.tag.tag-c2 { background: rgba(63, 107, 58, 0.13); }
.tag.tag-c3 { background: rgba(122, 74, 120, 0.12); }
.tag.tag-c4 { background: rgba(162, 59, 59, 0.11); }
.tag.tag-c5 { background: rgba(46, 111, 106, 0.12); }

.feed-empty {
	color: rgba(0, 0, 0, 0.5);
	font-style: italic;
}

/* ---------- Post header ---------- */
.post-header {
	margin-top: 20px;
	margin-bottom: 30px;
}

.post-title {
	font-size: 32px;
	line-height: 1.25;
	margin: 0 0 10px 0;
}

.post-subtitle {
	font-size: 18px;
	color: rgba(0, 0, 0, 0.6);
	margin: 0 0 12px 0;
	font-weight: normal;
}

.post-meta {
	color: #7f7f7f;
	font-size: 13px;
}

.post-cover {
	margin: 20px 0 0 0;
}

.post-cover img {
	width: 100%;
	height: auto;
	border-radius: 8px;
	display: block;
}

/* ---------- Post body ---------- */
.post-body {
	line-height: 1.7;
	font-size: 16px;
}

.post-body h2 {
	margin-top: 2em;
	margin-bottom: 0.6em;
	font-size: 22px;
}

.post-body h3 {
	margin-top: 1.6em;
	margin-bottom: 0.5em;
	font-size: 18px;
}

.post-body p {
	margin: 0 0 1.2em 0;
}

.post-body blockquote {
	margin: 1.2em 0;
	padding-left: 16px;
	border-left: 3px solid rgba(0, 0, 0, 0.2);
	color: rgba(0, 0, 0, 0.65);
	font-style: italic;
}

.post-body code {
	background: rgba(0, 0, 0, 0.06);
	border-radius: 3px;
	padding: 0.15em 0.4em;
	font-family: courier, monospace;
	font-size: 0.9em;
}

.post-body pre {
	background: rgba(0, 0, 0, 0.06);
	border-radius: 6px;
	padding: 14px 16px;
	overflow-x: auto;
}

.post-body pre code {
	background: none;
	padding: 0;
}

.post-body ul,
.post-body ol {
	padding-left: 22px;
	margin: 0 0 1.2em 0;
}

.post-body img {
	max-width: 100%;
	height: auto;
}

.post-figure {
	margin: 1.8em auto;
	text-align: center;
}

.post-figure img {
	max-width: 100%;
	height: auto;
	border-radius: 4px;
}

.post-figure figcaption {
	margin-top: 8px;
	color: rgba(0, 0, 0, 0.5);
	font-size: 13px;
}

/* :::gallery blocks, rendered as the slideshow styled in main.css */
.post-gallery {
	margin: 1.8em 0;
}

.post-gallery .slideshow-image {
	height: 100%; /* undo .post-body img's height: auto so tall photos fit */
}

/* HackMD-style :::info / :::warning / :::success / :::danger boxes */
.post-body .callout {
	margin: 1.4em 0;
	padding: 14px 18px;
	border-radius: 6px;
	border-left: 4px solid var(--callout-color, #2f5d8a);
	background: var(--callout-bg, rgba(47, 93, 138, 0.10));
}

.post-body .callout > :last-child {
	margin-bottom: 0;
}

.post-body .callout-info    { --callout-color: #2f5d8a; --callout-bg: rgba(47, 93, 138, 0.10); }
.post-body .callout-success { --callout-color: #3f6b3a; --callout-bg: rgba(63, 107, 58, 0.10); }
.post-body .callout-warning { --callout-color: #b07a12; --callout-bg: rgba(214, 160, 40, 0.15); }
.post-body .callout-danger  { --callout-color: #a23b3b; --callout-bg: rgba(162, 59, 59, 0.10); }

.post-body .katex-display {
	overflow-x: auto;
	overflow-y: hidden;
	padding: 4px 0;
}

.post-footer {
	margin-top: 50px;
	padding-top: 16px;
	border-top: 1px solid rgba(0, 0, 0, 0.08);
}

/* Heart + count added by renderLikeButton() in blogEngine.js */
.like-btn {
	appearance: none;
	font: inherit;
	font-size: 12px;
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 3px 10px;
	color: rgba(0, 0, 0, 0.65);
	background: transparent;
	border: 1px solid rgba(0, 0, 0, 0.15);
	border-radius: 999px;
	cursor: pointer;
	transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.like-btn:hover {
	background: rgba(0, 0, 0, 0.05);
	border-color: rgba(0, 0, 0, 0.3);
}

.like-btn.liked {
	color: #a23b3b;
	border-color: rgba(162, 59, 59, 0.4);
	background: rgba(162, 59, 59, 0.08);
}

.like-btn .fa {
	font-size: 13px;
}

/* ---------- Mobile ---------- */
@media screen and (max-width: 600px) {
	.feed-row {
		flex-direction: column;
		gap: 4px;
	}

	.feed-row-meta {
		flex-direction: row-reverse;
		align-items: center;
		gap: 8px;
		white-space: normal;
	}

	.post-title {
		font-size: 24px;
	}

	.post-subtitle {
		font-size: 15px;
	}
}