/* Design tokens — from Figma "Front Page" (1440px frame, 330px margins, 12 columns, 24px gutter) */
:root {
	--primary: #007BEE; /* primary brand color */
	--accent: var(--primary); /* highlight & hover/interaction color */
	--ink: #000;
	--paper: #fff;
	--gutter: 24px;
	--content: 780px; /* 1440 - 2 * 330 */
	--font-display: "Roboto Condensed", "Arial Narrow", sans-serif;
	--font-body: "Roboto", "Helvetica Neue", sans-serif;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--font-body);
}

img,
video,
iframe {
	max-width: 100%;
}

a {
	color: inherit;
}

/* Text selection highlight uses the primary color */
::selection {
	background: var(--accent);
	color: var(--paper);
}

::-moz-selection {
	background: var(--accent);
	color: var(--paper);
}

/* Page column: 780px of content = 330px margins on the 1440px design frame,
   collapsing to 24px side margins on small screens */
.page {
	width: min(var(--content), 100% - 2 * var(--gutter));
	margin-inline: auto;
	padding: 128px 0 48px;
	display: flex;
	flex-direction: column;
	gap: 32px;
}

/* ===== Header ===== */
.site-header {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

.site-title {
	margin: 0;
	font-family: var(--font-display);
	font-weight: 700;
	font-size: clamp(32px, 6vw, 48px);
	text-decoration: none;
	color: inherit;
}

.accent {
	color: var(--accent);
}

.site-nav {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 12px clamp(16px, 4vw, 54px);
	font-size: clamp(16px, 2.5vw, 20px);
}

.site-nav a {
	text-decoration: none;
	text-transform: uppercase;
}

.site-nav a:hover {
	color: var(--accent);
	text-decoration: underline;
}

.nav-primary {
	justify-content: space-between;
}

/* ===== Section header ===== */
.section {
	display: flex;
	flex-direction: column;
	gap: 32px;
}

.section-header {
	border-top: 1px solid var(--ink);
	padding-top: 8px;
}

.section-header h2 {
	margin: 0;
	font-family: var(--font-display);
	font-weight: 500;
	font-size: clamp(28px, 5vw, 40px);
	text-transform: uppercase;
}

/* ===== 12-column grid ===== */
.grid {
	display: grid;
	grid-template-columns: repeat(12, 1fr);
	gap: var(--gutter);
}

/* ===== Experience card: 378x388 at full width (spans 6 of 12 columns) ===== */
.experience-card {
	grid-column: span 6;
	display: flex;
	flex-direction: column;
	gap: var(--gutter); /* 24px between Title / Image / Description */
}

.experience-card .card-title {
	margin: 0;
	font-family: var(--font-display);
	font-weight: 500;
	font-size: clamp(24px, 4.5vw, 32px);
	text-transform: uppercase;
}

.card-title a {
	text-decoration: none;
}

.card-title a:hover {
	color: var(--accent);
}

.card-thumb {
	display: block;
	border: 1px solid var(--ink);
	aspect-ratio: 2 / 1; /* 378x189 thumbnail per Figma */
	overflow: hidden;
}

.card-thumb img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.experience-card .card-desc {
	font-weight: 300;
	font-size: 14px;
}

.card-desc p {
	margin: 0 0 1em;
}

.card-desc p:last-child {
	margin-bottom: 0;
}

/* ===== Project card: 244x244 at full width (spans 4 of 12 columns) ===== */
.project-card {
	grid-column: span 4;
	border: 1px solid var(--ink); /* card stroke */
	display: flex;
	flex-direction: column;
}

.project-card .card-title {
	margin: 0;
	min-height: 36px;
	padding: 2px 5px;
	display: flex;
	align-items: center;
	font-family: var(--font-display);
	font-weight: 500;
	font-size: 14px;
	text-transform: uppercase;
}

.project-card .card-thumb {
	border-inline: 0;
	aspect-ratio: 2 / 1; /* 244x122 thumbnail per Figma */
}

.project-card .card-desc {
	flex: 1;
	padding: 8px 6px;
	font-weight: 300;
	font-size: 12px;
}

/* ===== Hover interactions (primary color) ===== */
.card-thumb,
.project-card,
.hl {
	transition: border-color 0.15s ease, color 0.15s ease;
}

/* Experience: thumbnail stroke turns primary on card hover */
.experience-card:hover .card-thumb {
	border-color: var(--accent);
}

/* Project: only the image stroke turns primary on hover (card border unchanged) */
.project-card:hover .card-thumb {
	border-color: var(--accent);
}

/* Skills, role & company: primary color + underline on hover */
.hl:hover {
	color: var(--accent);
	text-decoration: underline;
}

/* Inline links (project cards, blog body) turn primary on hover */
.card-desc a:hover,
.post-content a:hover {
	color: var(--accent);
}

/* ===== Post pages (experience & project blogs) ===== */
/* Blog pages: brand title shrinks to 32px */
.post .site-title {
	font-size: 32px;
}

.post-header {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

.post-header h1 {
	margin: 0;
	font-family: var(--font-display);
	font-weight: 700;
	font-size: clamp(32px, 6vw, 48px);
	text-transform: uppercase;
}

.post-meta {
	margin: 0;
	font-weight: 300;
	font-size: 14px;
}

.post-links {
	margin: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.post-links a {
	display: inline-block;
	border: 1px solid var(--ink);
	padding: 4px 12px;
	font-size: 14px;
	text-decoration: none;
}

.post-links a:hover {
	background: var(--accent);
	border-color: var(--accent);
	color: var(--paper);
}

.post-content {
	font-size: 16px;
	line-height: 1.6;
}

/* Bold words in blog markdown: primary color, Roboto bold */
.post-content strong,
.post-content b {
	font-family: var(--font-body);
	font-weight: 700;
	color: var(--accent);
}

.post-content h2 {
	border-top: 1px solid var(--ink);
	padding-top: 8px;
	margin: 48px 0 16px;
	font-family: var(--font-display);
	font-weight: 500;
	font-size: clamp(24px, 4.5vw, 32px);
	text-transform: uppercase;
}

.post-content img {
	margin: 8px 0;
}

.post-content video {
	border: 1px solid var(--ink);
	margin: 8px 0;
	display: block;
	width: 100%;
}

.post-content iframe {
	width: 100%;
	aspect-ratio: 16 / 9;
	height: auto;
	border: 0;
	margin: 8px 0;
}

/* ===== Media grid: 378px-wide embeds arranged 2-up (half of the 780 content column) ===== */
.post-content .media-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 24px;
	margin: 8px 0;
	align-items: start;
}

.post-content .media-grid > * {
	width: 100%;
	height: auto;
	margin: 0;
}

.post-content .media-grid iframe {
	aspect-ratio: 16 / 9; /* default; per-embed override via inline style */
	border: 0;
	display: block;
}

/* ===== About section (780x388): image 5 cols, text 7 cols, 6px text padding ===== */
.about {
	align-items: stretch;
}

.about-image {
	grid-column: span 5;
	min-height: 388px;
	overflow: hidden;
}

.about-image img {
	display: block;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.about-text {
	grid-column: span 7;
	min-height: 388px;
	padding: 6px; /* 6px all sides per spec */
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 14px;
	font-size: 14px;
}

.about-text p {
	margin: 0;
}

/* ===== Footer: © William Zhao (left) + personal nav row (right) ===== */
.site-footer {
	border-top: 1px solid var(--ink);
	padding-top: 16px;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 12px 24px;
}

.copyright {
	margin: 0;
	font-weight: 300; /* thin Roboto */
	font-size: 14px;
}

/* ===== Responsive breakpoints ===== */
@media (max-width: 900px) {
	.page {
		padding-top: 64px;
	}

	.project-card {
		grid-column: span 6;
	}
}

@media (max-width: 680px) {
	.experience-card {
		grid-column: span 12;
	}

	.about-image,
	.about-text {
		grid-column: span 12;
	}

	.about-image {
		min-height: 320px;
	}

	.about-text {
		min-height: 0;
	}

	.post-content .media-grid {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 520px) {
	.project-card {
		grid-column: span 12;
	}
}