:root {
	--paper: #f5f0e7;
	--surface: #fffdf8;
	--ink: #29231f;
	--muted: #6c625a;
	--accent: #9f3f2f;
	--accent-dark: #762b20;
	--line: #d9cec0;
	--soft: #eae0d3;
	--header: #251e1a;
	--shadow: 0 16px 40px rgba(66, 48, 37, 0.09);
	--radius: 14px;
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background:
		radial-gradient(circle at 15% 10%, rgba(159, 63, 47, 0.07), transparent 30rem),
		var(--paper);
	color: var(--ink);
	font-family: "Segoe UI", Arial, sans-serif;
	font-size: 16px;
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}

img {
	display: block;
	max-width: 100%;
}

a {
	color: var(--accent-dark);
	text-underline-offset: 3px;
}

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

a:focus-visible,
input:focus-visible,
textarea:focus-visible,
button:focus-visible {
	outline: 3px solid #c56a57;
	outline-offset: 3px;
}

h1,
h2,
h3,
p {
	margin-top: 0;
}

h1,
h2,
h3 {
	font-family: Georgia, "Times New Roman", serif;
	line-height: 1.2;
}

h1 {
	margin-bottom: 24px;
	font-size: clamp(2.35rem, 5vw, 4.4rem);
	letter-spacing: -0.04em;
}

h2 {
	margin-bottom: 24px;
	font-size: clamp(1.75rem, 3vw, 2.5rem);
	letter-spacing: -0.025em;
}

h3 {
	margin-bottom: 8px;
	font-size: 1.2rem;
}

/* Header */
.site-header {
	position: sticky;
	top: 0;
	z-index: 20;
	display: grid;
	grid-template-columns: auto 1fr auto;
	align-items: center;
	gap: 24px;
	min-height: 76px;
	padding: 14px max(24px, calc((100vw - 1180px) / 2));
	background: rgba(37, 30, 26, 0.96);
	color: #fffaf2;
	box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1);
	backdrop-filter: blur(12px);
}

.site-name {
	color: #fffaf2;
	font: 700 1.45rem/1 Georgia, "Times New Roman", serif;
	text-decoration: none;
	white-space: nowrap;
}

.site-name:hover {
	color: #f2cbbb;
}

.tagline {
	margin: 0;
	color: #c9bdb3;
	font-size: 0.83rem;
}

.main-nav ul {
	display: flex;
	align-items: center;
	gap: 6px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.main-nav a {
	display: flex;
	align-items: center;
	min-height: 44px;
	padding: 8px 12px;
	border-radius: 8px;
	color: #f7eee5;
	font-size: 0.9rem;
	font-weight: 600;
	text-decoration: none;
	transition: background-color 180ms ease, color 180ms ease;
}

.main-nav a:hover {
	background: rgba(255, 255, 255, 0.1);
	color: #fff;
}

/* Main layout */
.layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 280px;
	gap: clamp(28px, 5vw, 64px);
	width: min(1180px, calc(100% - 48px));
	margin: 0 auto;
	padding: clamp(54px, 8vw, 100px) 0;
}

main {
	min-width: 0;
}

main > article,
main > section {
	scroll-margin-top: 100px;
	margin-bottom: clamp(72px, 9vw, 112px);
}

#gioi-thieu {
	display: grid;
	grid-template-columns: minmax(280px, 0.9fr) minmax(300px, 1.1fr);
	column-gap: clamp(30px, 5vw, 64px);
	align-items: center;
}

#gioi-thieu h1 {
	grid-column: 1 / -1;
}

#gioi-thieu figure {
	grid-column: 1;
	grid-row: 2 / span 2;
	margin: 0;
}

#gioi-thieu figure img {
	width: 100%;
	aspect-ratio: 4 / 3;
	border-radius: var(--radius);
	object-fit: cover;
	box-shadow: var(--shadow);
}

#gioi-thieu figcaption {
	margin-top: 10px;
	color: var(--muted);
	font-size: 0.82rem;
}

#gioi-thieu > p {
	grid-column: 2;
	margin-bottom: 16px;
	color: #514842;
	font-size: 1.05rem;
}

/* Value cards */
.value-list,
.team-list,
.footer-cols,
.recent {
	margin: 0;
	padding: 0;
	list-style: none;
}

.value-list {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 16px;
}

.value-card {
	position: relative;
	min-height: 180px;
	padding: 30px 24px 24px;
	overflow: hidden;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: var(--surface);
	box-shadow: 0 10px 30px rgba(66, 48, 37, 0.05);
}

.value-card::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	width: 56px;
	height: 4px;
	background: var(--accent);
}

.value-card p {
	margin-bottom: 0;
	color: var(--muted);
	font-size: 0.92rem;
}

/* Team */
.team-list {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 16px;
}

.member {
	padding: 26px 18px;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: var(--surface);
	text-align: center;
}

.member img {
	width: 96px;
	height: 96px;
	margin: 0 auto 18px;
	border: 5px solid var(--soft);
	border-radius: 50%;
	object-fit: cover;
}

.member p {
	margin-bottom: 0;
	color: var(--muted);
	font-size: 0.88rem;
}

/* Contact */
#lien-he {
	padding: clamp(28px, 5vw, 48px);
	border-radius: calc(var(--radius) + 4px);
	background: #302723;
	color: #fffaf2;
	box-shadow: var(--shadow);
}

#lien-he h2 {
	color: #fff;
}

.contact-form {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 18px;
}

.contact-form p {
	margin: 0;
}

.contact-form p:nth-child(3),
.contact-form p:last-child {
	grid-column: 1 / -1;
}

.contact-form label {
	display: inline-block;
	margin-bottom: 7px;
	font-size: 0.88rem;
	font-weight: 700;
}

.contact-form input,
.contact-form textarea {
	width: 100%;
	margin-top: 5px;
	padding: 12px 14px;
	border: 1px solid #76675d;
	border-radius: 8px;
	background: #fffdf8;
	color: var(--ink);
	font: inherit;
}

.contact-form textarea {
	min-height: 130px;
	resize: vertical;
}

.contact-form button {
	min-height: 46px;
	padding: 10px 24px;
	border: 0;
	border-radius: 8px;
	background: var(--accent);
	color: #fff;
	cursor: pointer;
	font: 700 0.94rem/1 "Segoe UI", Arial, sans-serif;
	transition: background-color 180ms ease, transform 180ms ease;
}

.contact-form button:hover {
	background: #b34a38;
	transform: translateY(-1px);
}

/* Sidebar */
.sidebar {
	position: sticky;
	top: 104px;
	align-self: start;
	padding: 25px;
	border: 1px solid var(--line);
	border-radius: var(--radius);
	background: rgba(255, 253, 248, 0.86);
	box-shadow: var(--shadow);
}

.sidebar h2 {
	margin-bottom: 18px;
	font-size: 1.4rem;
}

.recent {
	margin-bottom: 24px;
}

.recent li + li {
	border-top: 1px solid var(--line);
}

.recent a {
	display: block;
	padding: 13px 0;
	color: var(--ink);
	font-size: 0.92rem;
	font-weight: 600;
	text-decoration: none;
}

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

.sidebar > p {
	margin: 0;
	padding-top: 18px;
	border-top: 1px solid var(--line);
	color: var(--muted);
	font-size: 0.88rem;
}

/* Footer */
.site-footer {
	padding: 58px max(24px, calc((100vw - 1180px) / 2)) 24px;
	background: var(--header);
	color: #d3c9c0;
}

.footer-cols {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	gap: 32px;
}

.footer-cols h3 {
	color: #fffaf2;
	font-size: 1rem;
}

.footer-cols p {
	margin-bottom: 0;
	color: #bdb0a7;
	font-size: 0.85rem;
}

.copyright {
	margin: 42px 0 0;
	padding-top: 20px;
	border-top: 1px solid #4b403a;
	color: #95877e;
	text-align: center;
}

/* Tablet */
@media (max-width: 900px) {
	.site-header {
		grid-template-columns: 1fr auto;
	}

	.tagline {
		display: none;
	}

	.layout {
		grid-template-columns: 1fr;
	}

	.sidebar {
		position: static;
		display: grid;
		grid-template-columns: 1fr 1fr;
		gap: 8px 32px;
	}

	.sidebar h2 {
		grid-column: 1 / -1;
	}

	.sidebar > p {
		align-self: end;
	}

	.value-list,
	.team-list {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	.value-card:last-child,
	.member:last-child {
		grid-column: 1 / -1;
	}

	.footer-cols {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}

/* Mobile */
@media (max-width: 600px) {
	.site-header {
		position: static;
		display: block;
		padding: 20px;
	}

	.site-name {
		display: inline-block;
		margin-bottom: 14px;
	}

	.main-nav ul {
		display: grid;
		grid-template-columns: repeat(2, minmax(0, 1fr));
		gap: 8px;
	}

	.main-nav a {
		justify-content: center;
		border: 1px solid rgba(255, 255, 255, 0.15);
	}

	.layout {
		width: min(100% - 32px, 540px);
		padding: 48px 0 64px;
	}

	main > article,
	main > section {
		margin-bottom: 64px;
		scroll-margin-top: 20px;
	}

	#gioi-thieu {
		display: block;
	}

	#gioi-thieu figure {
		margin-bottom: 24px;
	}

	.value-list,
	.team-list,
	.contact-form,
	.sidebar,
	.footer-cols {
		grid-template-columns: 1fr;
	}

	.value-card:last-child,
	.member:last-child,
	.contact-form p:nth-child(3),
	.contact-form p:last-child,
	.sidebar h2 {
		grid-column: auto;
	}

	.value-card {
		min-height: 0;
	}

	#lien-he {
		padding: 26px 20px;
	}

	.sidebar {
		display: block;
		padding: 22px;
	}

	.footer-cols {
		gap: 28px;
	}
}

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

	* {
		transition-duration: 0.01ms !important;
	}
}