/**
 * base.css — reset nhẹ, kiểu chữ nền, khung trang.
 */

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

html {
	-webkit-text-size-adjust: 100%;
	scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
}

body {
	margin: 0;
	background: var(--c-cream);
	color: var(--c-text);
	font-family: var(--font-body);
	font-size: var(--fs-md);
	line-height: var(--lh-body);
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
}

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

img {
	display: block;
}

a {
	color: var(--c-terracotta-deep);
	text-decoration-thickness: 1px;
	text-underline-offset: 0.18em;
	transition: color var(--dur) var(--ease);
}

a:hover {
	color: var(--c-pine);
}

h1,
h2,
h3,
h4 {
	margin: 0 0 var(--sp-4);
	font-family: var(--font-display);
	font-weight: 500;
	line-height: var(--lh-tight);
	color: var(--c-pine);
	letter-spacing: -0.01em;
}

h1 {
	font-size: var(--fs-2xl);
}

h2 {
	font-size: var(--fs-xl);
}

h3 {
	font-size: var(--fs-lg);
}

p {
	margin: 0 0 1.1em;
}

p:last-child {
	margin-bottom: 0;
}

ul,
ol {
	margin: 0 0 1.1em;
	padding-left: 1.35em;
}

blockquote {
	margin: var(--sp-6) 0;
	padding-left: var(--sp-5);
	border-left: 3px solid var(--c-terracotta);
	font-family: var(--font-display);
	font-size: var(--fs-lg);
	font-style: italic;
	color: var(--c-pine);
}

hr {
	margin: var(--sp-7) 0;
	border: 0;
	border-top: 1px solid var(--c-line);
}

/* — Khung trang — */

.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--gutter);
}

.container--narrow {
	max-width: calc(var(--container-text) + var(--gutter) * 2);
}

.section {
	padding-block: clamp(var(--sp-7), 7vw, var(--sp-9));
}

.section + .section {
	padding-top: 0;
}

/* — Chữ cho phần nội dung soạn bằng khối — */

.entry-content > * + * {
	margin-top: 1.1em;
}

.entry-content > p,
.entry-content > ul,
.entry-content > ol,
.entry-content > blockquote {
	max-width: var(--container-text);
}

.entry-content h2 {
	margin-top: 2em;
}

.entry-content h3 {
	margin-top: 1.6em;
}

/* — Tiện ích — */

.screen-reader-text {
	position: absolute;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect(0 0 0 0);
	white-space: nowrap;
	border: 0;
}

.skip-link:focus {
	position: fixed;
	top: var(--sp-3);
	left: var(--sp-3);
	z-index: var(--z-overlay);
	width: auto;
	height: auto;
	clip: auto;
	padding: var(--sp-3) var(--sp-4);
	background: var(--c-pine);
	color: var(--c-on-dark);
	border-radius: var(--radius-sm);
	white-space: normal;
}

.empty-state {
	padding-block: var(--sp-9);
	color: var(--c-text-muted);
	text-align: center;
}