/*
 * Site Spec Sheet - kieu dang chung.
 *
 * Y do: trong nhu mot tai lieu ky thuat. Day dac, it khoang trang, duong ke
 * manh o khap noi, khong bong do, khong bo goc. Moi cho co con so deu dung
 * IBM Plex Mono de cac cot thang hang; tieu de va van xuoi dung Fira Sans.
 */

:root {
	--bg: #ffffff;
	--surface: #f3f5f8;
	--ink: #1a1c1f;
	--muted: #555c66;
	--line: #ccd3dc;
	--accent: #1f4b99;

	/* Hai mau dan xuat: ke trong bang phai nhat hon ke ngoai cung, neu khong
	   bang muoi dong nhin nhu mot tam luoi sat. */
	--line-soft: #e4e9ef;
	--tint: #eef2f8;

	--wrap: 1180px;
	--art: 900px;

	--sans: "Fira Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
	--mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

body {
	margin: 0;
	background: var(--bg);
	color: var(--ink);
	font-family: var(--sans);
	font-size: 15px;
	line-height: 1.55;
	-webkit-text-size-adjust: 100%;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--sans); font-weight: 600; line-height: 1.22; margin: 0; }

.screen-reader-text {
	position: absolute; width: 1px; height: 1px;
	overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link:focus {
	position: fixed; top: 8px; left: 8px; z-index: 50;
	width: auto; height: auto; clip: auto;
	background: var(--ink); color: #fff; padding: 8px 12px;
	font-family: var(--mono); font-size: 12px;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 22px 16px 52px; }

/* ---------------------------------------------------------------- */
/* Dau trang                                                         */
/* ---------------------------------------------------------------- */

.site-head { border-bottom: 2px solid var(--ink); background: var(--bg); }
.head-in { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

.head-top {
	display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
	padding: 12px 0 10px;
}
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.brand-name { font-family: var(--sans); font-size: 18px; font-weight: 700; letter-spacing: -.01em; }
.head-claim {
	margin: 0; flex: 1 1 220px; min-width: 0;
	font-family: var(--mono); font-size: 11px; color: var(--muted); line-height: 1.4;
}

.search-form { display: flex; border: 1px solid var(--line); }
.search-form input[type="search"] {
	border: 0; padding: 6px 9px; min-width: 0; width: 150px;
	font-family: var(--mono); font-size: 12px; color: var(--ink); background: var(--bg);
}
.search-form input[type="search"]:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
.search-form button {
	border: 0; border-left: 1px solid var(--line); background: var(--surface);
	color: var(--ink); padding: 6px 11px; cursor: pointer;
	font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: .06em;
}
.search-form button:hover { background: var(--accent); color: #fff; }

/* Hang chip chuyen muc cuon ngang duoc tren dien thoai. */
.site-nav { overflow-x: auto; }
.site-nav ul {
	display: flex; gap: 0; list-style: none; margin: 0; padding: 0 0 8px;
	white-space: nowrap;
}
.site-nav a {
	display: inline-flex; align-items: baseline; gap: 6px;
	border: 1px solid var(--line); border-right-width: 0;
	padding: 5px 10px; text-decoration: none;
	font-family: var(--mono); font-size: 11.5px;
	text-transform: uppercase; letter-spacing: .05em;
}
.site-nav li:last-child a { border-right-width: 1px; }
.site-nav a:hover { background: var(--tint); color: var(--accent); }
.nav-count { font-size: 9.5px; color: var(--muted); }

/* ---------------------------------------------------------------- */
/* Dai so lieu                                                       */
/* ---------------------------------------------------------------- */

.ss-stats {
	display: grid; gap: 0; margin: 14px 0 0;
	grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
	border: 1px solid var(--line);
}
.ss-stat { padding: 8px 11px; border-right: 1px solid var(--line); }
.ss-stat:last-child { border-right: 0; }
.ss-stats dt {
	font-family: var(--mono); font-size: 10px; color: var(--muted);
	text-transform: uppercase; letter-spacing: .07em;
}
.ss-stats dd { margin: 2px 0 0; font-family: var(--mono); font-size: 19px; font-weight: 500; }

/* ---------------------------------------------------------------- */
/* Trang chu                                                         */
/* ---------------------------------------------------------------- */

.front-head { padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.front-head h1 { font-size: 30px; letter-spacing: -.015em; }
.front-lede { margin: 8px 0 0; max-width: 60ch; color: var(--muted); font-size: 14.5px; }

.lead {
	display: grid; gap: 0; margin: 22px 0 0;
	border: 1px solid var(--line);
}
.lead-img { border-bottom: 1px solid var(--line); background: var(--surface); padding: 14px; }
.lead-img img { margin: 0 auto; max-height: 260px; width: auto; }
.lead-body { padding: 13px 15px 15px; min-width: 0; }
.lead-kicker {
	margin: 0 0 7px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
	font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .07em;
}
.lead-kicker a { color: var(--muted); }
.tag-new { background: var(--accent); color: #fff; padding: 2px 6px; }
.lead-body h2 { font-size: 21px; letter-spacing: -.01em; }
.lead-body h2 a { text-decoration: none; }
.lead-body h2 a:hover { color: var(--accent); }
.lead-sum { margin: 8px 0 12px; color: var(--muted); font-size: 14px; }
.lead-note { margin: 6px 0 0; font-family: var(--mono); font-size: 10.5px; color: var(--muted); }

@media (min-width: 760px) {
	.lead { grid-template-columns: 300px 1fr; }
	.lead-img { border-bottom: 0; border-right: 1px solid var(--line); }
}

.strips { display: grid; gap: 0; margin: 26px 0 0; }
@media (min-width: 900px) { .strips { grid-template-columns: repeat(3, 1fr); } }

.strip { border: 1px solid var(--line); margin: -1px 0 0; padding: 0 0 6px; }
@media (min-width: 900px) { .strip { margin: 0 0 0 -1px; } }
.strip .sec-head { padding: 9px 12px 7px; border-bottom: 1px solid var(--line); margin: 0; background: var(--surface); }
.strip .sec-head h2 { font-size: 14px; }
.strip .sec-sub { font-size: 10.5px; }

.rank-list { list-style: none; margin: 0; padding: 0; }
.rank-list li {
	display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; gap: 8px; align-items: baseline;
	padding: 7px 12px; border-bottom: 1px solid var(--line-soft);
}
.rank-list li:last-child { border-bottom: 0; }
.rank-n { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.rank-t { font-size: 13px; text-decoration: none; line-height: 1.35; overflow-wrap: break-word; min-width: 0; }
.rank-t:hover { color: var(--accent); text-decoration: underline; }
.rank-v { font-family: var(--mono); font-size: 13px; white-space: nowrap; }

/* ---------------------------------------------------------------- */
/* Dau muc chung                                                     */
/* ---------------------------------------------------------------- */

.cat-block { margin: 30px 0 0; }
.sec-head {
	display: flex; align-items: baseline; justify-content: space-between;
	gap: 12px; flex-wrap: wrap; margin: 0 0 9px;
	border-bottom: 2px solid var(--ink); padding-bottom: 6px;
}
.sec-head h2 { font-size: 17px; }
.sec-head h2 a { text-decoration: none; }
.sec-head h2 a:hover { color: var(--accent); }
.sec-sub {
	margin: 0; font-family: var(--mono); font-size: 11px; color: var(--muted);
	text-transform: uppercase; letter-spacing: .05em;
}
.sec-sub a { color: var(--accent); }

/* ---------------------------------------------------------------- */
/* Bang - khoi chinh cua ca site                                     */
/* ---------------------------------------------------------------- */

/* Bang dai nam trong vung cuon RIENG, de trang khong tran ngang o 375px. */
.ss-scroll {
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
	border: 1px solid var(--line);
	background: var(--bg);
}

.ss-table {
	width: 100%; min-width: 620px;
	border-collapse: separate; border-spacing: 0;
	font-family: var(--mono); font-size: 12.5px;
}
.ss-table thead th {
	background: var(--surface); color: var(--muted);
	font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: .07em;
	text-align: left; padding: 7px 10px;
	border-bottom: 1px solid var(--line); white-space: nowrap;
}
.ss-table td {
	padding: 8px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: top;
}
.ss-table tbody tr:last-child td { border-bottom: 0; }
.ss-table tbody tr:hover td { background: #f8fafc; }

.c-name { width: 46%; }
.c-name a {
	font-family: var(--sans); font-size: 14px; font-weight: 500;
	text-decoration: none; line-height: 1.35;
}
.c-name a:hover { color: var(--accent); text-decoration: underline; }
.c-name-cat {
	display: block; margin-top: 3px;
	font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em;
}
.c-brand { white-space: nowrap; }
.c-num { text-align: right; white-space: nowrap; }
.c-rate { white-space: nowrap; }

.ss-num { font-family: var(--mono); font-weight: 500; font-variant-numeric: tabular-nums; }
.ss-unit { font-family: var(--mono); font-size: .85em; color: var(--muted); }
.ss-none { color: var(--muted); }

.ss-rate { display: inline-flex; align-items: center; gap: 6px; }
.ss-bar { display: inline-block; width: 44px; height: 5px; background: var(--line); }
.ss-bar i { display: block; height: 100%; background: var(--accent); }
.ss-rate-n { font-size: 9.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

.ss-table-note {
	margin: 6px 0 0;
	font-family: var(--mono); font-size: 10.5px; color: var(--muted); line-height: 1.45;
}

/*
 * Bang thong so hai cot. Dat o day chu khong o article.css vi trang chu cung
 * dung no cho bai dan, ma article.css chi duoc nap o trang bai.
 */
.ss-spec {
	width: 100%; border-collapse: separate; border-spacing: 0;
	font-family: var(--mono); font-size: 12.5px;
}
.ss-spec th[scope="row"] {
	width: 38%; background: #fafbfd; color: var(--muted);
	text-align: left; font-size: 11.5px; font-weight: 500;
	padding: 6px 11px; vertical-align: top;
	border-bottom: 1px solid var(--line-soft); border-right: 1px solid var(--line-soft);
}
.ss-spec td {
	padding: 6px 11px; vertical-align: top;
	border-bottom: 1px solid var(--line-soft);
}
.ss-spec tbody tr:last-child th,
.ss-spec tbody tr:last-child td { border-bottom: 0; }

/* ---------------------------------------------------------------- */
/* Chuyen muc, tim kiem, 404                                         */
/* ---------------------------------------------------------------- */

.crumbs {
	font-family: var(--mono); font-size: 10.5px; color: var(--muted);
	text-transform: uppercase; letter-spacing: .07em; margin-bottom: 12px;
}
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); text-decoration: underline; }

.arch-head { padding-bottom: 16px; border-bottom: 2px solid var(--ink); margin-bottom: 14px; }
.arch-kind {
	margin: 0 0 5px; color: var(--accent);
	font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .09em;
}
.arch-head h1 { font-size: 26px; letter-spacing: -.015em; }
.arch-desc { margin-top: 8px; color: var(--muted); font-size: 14px; max-width: 65ch; }
.arch-count { margin: 8px 0 0; font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.arch-search { margin-top: 12px; }
.arch-search .search-form { display: inline-flex; }
.arch-search .search-form input[type="search"] { width: 210px; }
.empty { color: var(--muted); font-size: 14px; }

.pager ul {
	list-style: none; display: flex; flex-wrap: wrap; gap: 0; margin: 18px 0 0; padding: 0;
}
.pager a, .pager span {
	display: inline-block; border: 1px solid var(--line); border-right-width: 0;
	padding: 6px 11px; text-decoration: none;
	font-family: var(--mono); font-size: 12px;
}
.pager li:last-child a, .pager li:last-child span { border-right-width: 1px; }
.pager a:hover { background: var(--tint); color: var(--accent); }
.pager .current { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------------------------------------------------------------- */
/* Than bai - phan dung chung voi trang tinh                         */
/* ---------------------------------------------------------------- */

.article { max-width: var(--art); margin: 0 auto; padding: 22px 16px 40px; }

.art-head { padding-bottom: 16px; border-bottom: 2px solid var(--ink); }
.art-kicker {
	margin: 0 0 7px; display: flex; gap: 7px; flex-wrap: wrap;
	font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .09em;
	color: var(--muted);
}
.art-kicker a { color: var(--accent); text-decoration: none; }
.art-kicker a:hover { text-decoration: underline; }
.art-head h1 { font-size: 30px; letter-spacing: -.018em; }
.art-by {
	margin: 10px 0 0; display: flex; gap: 8px; flex-wrap: wrap;
	font-family: var(--mono); font-size: 11px; color: var(--muted);
}

.article-body {
	font-size: 16px; line-height: 1.62; margin-top: 20px;
	/* Ten model va dia chi dai khong duoc day trang tran ngang o 375px. */
	overflow-wrap: break-word;
}
.article-body p { margin: 0 0 1.05em; }
.article-body a { color: var(--accent); }
.article-body ul, .article-body ol { margin: 0 0 1.05em; padding-left: 20px; }
.article-body li { margin-bottom: .3em; }
.article-body h2 {
	clear: both; font-size: 21px; margin: 2.1em 0 .7em;
	border-top: 2px solid var(--ink); padding-top: 11px;
}
.article-body h3 {
	clear: both; font-size: 18px; margin: 1.9em 0 .6em;
	border-left: 3px solid var(--accent); padding-left: 11px;
}

.article-body table {
	width: 100%; border-collapse: separate; border-spacing: 0;
	font-family: var(--mono); font-size: 12.5px;
}
.article-body .ss-scroll { margin: 0 0 1.2em; }
.article-body .ss-scroll > table:not([class]) { min-width: 620px; }
.article-body table th {
	background: var(--surface); color: var(--muted);
	font-size: 10px; font-weight: 500; text-transform: uppercase; letter-spacing: .07em;
	text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line);
	vertical-align: top;
}
.article-body table td {
	padding: 7px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: top;
}
.article-body table tbody tr:last-child td,
.article-body table tbody tr:last-child th { border-bottom: 0; }

.art-tags {
	display: flex; flex-wrap: wrap; gap: 0; margin-top: 26px;
	border-top: 1px solid var(--line); padding-top: 14px;
}
.art-tags a {
	border: 1px solid var(--line); border-right-width: 0; padding: 4px 9px;
	text-decoration: none; font-family: var(--mono); font-size: 11px;
}
.art-tags a:last-child { border-right-width: 1px; }
.art-tags a:hover { background: var(--tint); color: var(--accent); }

/* ---------------------------------------------------------------- */
/* Chan trang                                                        */
/* ---------------------------------------------------------------- */

.site-foot { border-top: 2px solid var(--ink); margin-top: 40px; background: var(--surface); }
.foot-in { max-width: var(--wrap); margin: 0 auto; padding: 24px 16px 30px; }
.foot-cols { display: grid; gap: 22px; }
@media (min-width: 760px) { .foot-cols { grid-template-columns: 1.6fr 1fr 1.4fr; } }
.foot-head {
	margin: 0 0 9px; font-family: var(--mono); font-size: 10.5px;
	text-transform: uppercase; letter-spacing: .09em; color: var(--muted);
}
.foot-col .ss-stats { margin-top: 0; background: var(--bg); }
.foot-list { list-style: none; margin: 0; padding: 0; }
.foot-list li { margin-bottom: 5px; }
.foot-list a { font-family: var(--mono); font-size: 12px; text-decoration: none; }
.foot-list a:hover { color: var(--accent); text-decoration: underline; }
.foot-list-wrap { display: flex; flex-wrap: wrap; gap: 4px 12px; }
.foot-list-wrap li { margin-bottom: 0; }

.disclosure {
	margin: 24px 0 0; padding-top: 14px; border-top: 1px solid var(--line);
	font-family: var(--mono); font-size: 11px; color: var(--muted); line-height: 1.5;
	max-width: 80ch;
}
.copy { margin: 8px 0 0; font-family: var(--mono); font-size: 11px; color: var(--muted); }

@media (max-width: 520px) {
	.head-claim { display: none; }
	.search-form { flex: 1 1 100%; }
	.search-form input[type="search"] { width: 100%; flex: 1 1 auto; }
	.front-head h1 { font-size: 25px; }
	.art-head h1 { font-size: 24px; }
	.article-body { font-size: 15.5px; }
}


/* === de mau chu huy hieu plugin === */
/*
 * Huy hieu cua plugin dat chu cung mau voi nen (nen la chinh mau do pha 10%
 * do duc), nen tuong phan chi 2.5-4.1 - duoi chuan AA 4.5, rieng nhan
 * 'Prime' gan nhu khong doc duoc.
 *
 * Chi doi MAU CHU, giu nguyen nen cua plugin. Dung hai lop cung ten de co do
 * uu tien cao hon luat goc ma khong phai dung !important.
 *
 * Khong sua tep CSS cua plugin: ban cap nhat sau nay se ghi de len.
 */
.acms-badge.acms-badge--prime   { color: #01607f; }
.acms-badge.acms-badge--danger  { color: #a81b1b; }
.acms-badge.acms-badge--success { color: #10693a; }
.acms-badge.acms-badge--warning { color: #8a5a06; }
.acms-badge.acms-badge--info    { color: #0b5e86; }


/* === mau chu phu cua plugin === */
/*
 * Plugin lay mau chu phu tu `var(--color-text-muted, #9ca3af)`. Khong theme
 * nao dat bien do nen no roi ve #9ca3af - tren nen trang chi duoc 2.54, duoi
 * chuan. Do bang Chrome that: nhan "/10", "ACMS Score" va dong "Updated: ..."
 * deu dinh.
 *
 * #6b7280 duoc 4.83, va chinh plugin cung dung mau nay o cho khac.
 */
:root { --color-text-muted: #6b7280; }

/* ------------------------------------------------------------------ */

/* ------------------------------------------------------------------ */
/* Day lien ket trang tinh o chan trang.                                */
/* Mau chu ke thua cua chan trang: chu chan trang da qua vong do tuong  */
/* phan, con mau nhan cua site thi chua.                                */
/* ------------------------------------------------------------------ */
.ss-foot-pages {
	list-style: none;
	margin: 12px 0 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 6px 18px;
	font-size: 13px;
	line-height: 1.6;
}
.ss-foot-pages a {
	color: inherit;
	text-decoration: none;
	opacity: .82;
}
.ss-foot-pages a:hover,
.ss-foot-pages a:focus {
	opacity: 1;
	text-decoration: underline;
}

/* --- Logo thuong hieu ------------------------------------------------ */
/* Dau hieu do bang em nen no lon nho theo chinh co chu cua ten site. */
.ss-lg { white-space: nowrap; }
.ss-lg__mark { display: inline-block; width: 1em; height: 1em; vertical-align: -0.14em; margin-right: 0.36em; }
.ss-lg__tld { font-weight: 400; opacity: .5; }

/* --- Lien ket chan trang --------------------------------------------- */
/* Viet .ss-mang .ss-mang__h chu khong phai .ss-mang__h: luat cua theme
   kieu .xx-foot__disclosure p co do uu tien (0,1,1), cao hon (0,1,0), nen ban
   ngan gon bi de mat. Da do that moi biet.

   Khong dung opacity de lam mo: no keo do tuong phan xuong duoi nguong doc
   duoc o phan lon theme. Phan cap bang co chu la du, va co san toi thieu 11px
   vi co theme dat khoi cong bo chi 12px. */
.ss-mang { margin: 22px 0 0; }
.ss-mang .ss-mang__h { margin: 0 0 8px; font-size: max(11px, .8em); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.ss-mang .ss-mang__list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; font-size: max(11px, .8em); line-height: 1.6; }
.ss-mang .ss-mang__list li { margin: 0; padding: 0; flex: 0 0 auto; width: auto; max-width: 100%; }
.ss-mang .ss-mang__list li::before { content: none; }
.ss-mang .ss-mang__list a { text-decoration: none; }
.ss-mang .ss-mang__list a:hover,
.ss-mang .ss-mang__list a:focus { text-decoration: underline; }