/* ============================================================
   02-base.css — Typography, body, links, base reset
   ============================================================ */

/* --- Box model normalize --- */
*,
*::before,
*::after {
	box-sizing: border-box;
}

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

/* --- Body --- */
body,
body.ast-separate-container,
body.ast-plain-container {
	font-family: var(--y-font-sans);
	font-size: 1rem;
	line-height: var(--y-lh-normal);
	color: var(--y-ink);
	background-color: var(--y-cream);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	text-rendering: optimizeLegibility;
}

/* --- Headings --- */
h1, h2, h3, h4, h5, h6,
.entry-title,
.site-title,
.ast-archive-title {
	font-family: var(--y-font-serif);
	font-weight: 500;
	letter-spacing: -0.01em;
	line-height: var(--y-lh-tight);
	color: var(--y-ink);
	margin-top: 0;
	margin-bottom: 0.6em;
}

h1, .entry-title {
	font-size: clamp(2.5rem, 5vw, 4.5rem);
	font-weight: 500;
	line-height: 1.1;
	letter-spacing: -0.02em;
}

h2 {
	font-size: clamp(2rem, 4vw, 3rem);
	font-weight: 500;
	line-height: 1.15;
}

h3 {
	font-size: clamp(1.5rem, 2.5vw, 2rem);
	font-weight: 500;
	line-height: 1.25;
}

h4 {
	font-size: clamp(1.25rem, 2vw, 1.5rem);
	font-weight: 500;
}

h5 {
	font-size: 1.125rem;
	font-weight: 600;
}

h6 {
	font-size: 1rem;
	font-weight: 600;
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

/* Italic variant cho hero / pull-quote */
.y-serif-italic {
	font-family: var(--y-font-serif);
	font-style: italic;
	font-weight: 400;
}

/* --- Paragraphs --- */
p {
	margin-top: 0;
	margin-bottom: 1.25em;
	max-width: 70ch;
}

/* Lead paragraph */
.entry-content > p:first-of-type,
p.has-large-font-size {
	font-size: 1.125rem;
	line-height: 1.7;
	color: var(--y-ink-soft);
}

/* --- Links --- */
a {
	color: var(--y-sage-deep);
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 4px;
	transition: color var(--y-duration) var(--y-ease),
				text-decoration-color var(--y-duration) var(--y-ease);
}

a:hover,
a:focus-visible {
	color: var(--y-cedar);
	text-decoration-color: var(--y-cedar);
}

a:focus-visible {
	outline: 2px solid var(--y-sage);
	outline-offset: 3px;
	border-radius: var(--y-radius-sm);
}

/* --- Selection --- */
::selection {
	background-color: var(--y-sage);
	color: var(--y-cream);
}
::-moz-selection {
	background-color: var(--y-sage);
	color: var(--y-cream);
}

/* --- Lists --- */
ul, ol {
	padding-left: 1.4em;
	margin-bottom: 1.25em;
}
li {
	margin-bottom: 0.4em;
}

/* --- Blockquote --- */
blockquote {
	font-family: var(--y-font-serif);
	font-style: italic;
	font-size: 1.25rem;
	line-height: 1.5;
	color: var(--y-ink);
	border-left: 2px solid var(--y-sage);
	padding: 0.5rem 0 0.5rem 1.5rem;
	margin: 2rem 0;
	max-width: 60ch;
}

blockquote cite,
blockquote footer {
	display: block;
	font-family: var(--y-font-sans);
	font-style: normal;
	font-size: 0.875rem;
	color: var(--y-ink-soft);
	margin-top: 0.75rem;
	letter-spacing: 0.04em;
}

/* --- Horizontal rule --- */
hr {
	border: 0;
	height: 1px;
	background-color: var(--y-line);
	margin: var(--y-space-md) 0;
}

/* --- Code --- */
code, kbd, samp, pre {
	font-family: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
	font-size: 0.9em;
}

code {
	background-color: var(--y-cream-warm);
	padding: 0.15em 0.4em;
	border-radius: var(--y-radius-sm);
	color: var(--y-cedar);
}

pre {
	background-color: var(--y-cream-warm);
	padding: 1.25rem;
	border-radius: var(--y-radius-md);
	overflow-x: auto;
	border: 1px solid var(--y-line);
}

pre code {
	background: transparent;
	padding: 0;
	color: var(--y-ink);
}

/* --- Images --- */
img {
	max-width: 100%;
	height: auto;
	display: block;
}

figure {
	margin: 1.5rem 0;
}

figcaption {
	font-size: 0.875rem;
	color: var(--y-ink-soft);
	margin-top: 0.6rem;
	font-style: italic;
	text-align: center;
}

/* --- Forms (base — Astra sẽ refine thêm) --- */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="search"],
input[type="url"],
textarea,
select {
	font-family: var(--y-font-sans);
	font-size: 1rem;
	color: var(--y-ink);
	background-color: var(--y-cream);
	border: 1px solid var(--y-line);
	border-radius: var(--y-radius-sm);
	padding: 0.7rem 1rem;
	transition: border-color var(--y-duration-fast) var(--y-ease);
	width: 100%;
}

input:focus,
textarea:focus,
select:focus {
	outline: none;
	border-color: var(--y-sage);
	box-shadow: 0 0 0 3px rgba(var(--y-sage-rgb), 0.15);
}

label {
	font-size: 0.875rem;
	font-weight: 500;
	color: var(--y-ink);
	margin-bottom: 0.4rem;
	display: inline-block;
	letter-spacing: 0.02em;
}

/* --- Tables --- */
table {
	width: 100%;
	border-collapse: collapse;
	margin: 1.5rem 0;
	font-size: 0.95rem;
}

th, td {
	padding: 0.85rem 1rem;
	text-align: left;
	border-bottom: 1px solid var(--y-line);
}

th {
	font-family: var(--y-font-sans);
	font-weight: 600;
	font-size: 0.85rem;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--y-ink-soft);
	background-color: var(--y-cream-warm);
}

/* --- Accessibility helpers --- */
.screen-reader-text {
	position: absolute !important;
	clip: rect(1px, 1px, 1px, 1px);
	width: 1px;
	height: 1px;
	overflow: hidden;
}

/* --- Container utility --- */
.y-container {
	width: 100%;
	max-width: var(--y-container);
	margin-left: auto;
	margin-right: auto;
	padding-left: var(--y-gutter);
	padding-right: var(--y-gutter);
}

.y-container--narrow {
	max-width: var(--y-container-narrow);
}

/* --- Section spacing --- */
.y-section {
	padding-top: var(--y-space-lg);
	padding-bottom: var(--y-space-lg);
}

@media (max-width: 768px) {
	.y-section {
		padding-top: var(--y-space-md);
		padding-bottom: var(--y-space-md);
	}
}

/* --- Reduce motion preference --- */
@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}
}