@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap");
@import url("colors.css");

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

body {
	font-family: Inter, system-ui, -apple-system, sans-serif;
	background-color: var(--bg);
	color: var(--text);
	line-height: 1.6;
	max-width: 960px;
	margin: 0 auto;
	padding: 2rem 1rem;
}

header {
	text-align: center;
	margin-bottom: 3rem;
}

header h1 {
	color: var(--primary);
	font-size: 2.5rem;
	font-weight: 700;
}

header p {
	color: var(--text-secondary);
	font-size: 1.125rem;
	margin-top: 0.5rem;
}

.topic-grid {
	list-style: none;
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: 1.5rem;
}

.topic-card {
	display: block;
	text-decoration: none;
	color: inherit;
	padding: 1.5rem;
	border: 2px solid var(--border);
	border-radius: 8px;
	transition: border-color 0.2s;
}

.topic-card:hover,
.topic-card:focus-visible {
	border-color: var(--primary);
}

.topic-card h2 {
	color: var(--primary);
	font-size: 1.25rem;
	margin-bottom: 0.5rem;
}

.topic-card p {
	color: var(--text-secondary);
	font-size: 0.95rem;
}

footer {
	margin-top: 4rem;
	text-align: center;
	color: var(--border);
	font-size: 0.875rem;
}