:root {
  --blue: #1565c0;
  --blue-dark: #0d47a1;
  --green: #2e9e44;
  --green-dark: #23803a;
  --bg: #f2f4f7;
  --card: #fff;
  --text: #1f2933;
  --muted: #6b7785;
  --line: #e1e5ea;
  --radius: 8px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
h1, h2, h3 { line-height: 1.25; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: 13px; }
.is-hidden { display: none !important; }

/* Header */
.site-header { background: var(--blue); box-shadow: 0 2px 6px rgba(0,0,0,.15); }
.header-row { display: flex; align-items: center; gap: 24px; min-height: 64px; flex-wrap: wrap; }
.logo img { display: block; height: 40px; width: auto; }
.main-nav { display: flex; gap: 4px; }
.main-nav a { color: #fff; padding: 8px 12px; border-radius: 6px; font-weight: 600; }
.main-nav a:hover, .main-nav a.active { background: rgba(255,255,255,.16); text-decoration: none; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; color: #fff; font-size: 26px; cursor: pointer; }
.search { display: flex; margin-left: auto; }
.search input { width: 260px; padding: 8px 12px; border: 0; border-radius: 6px 0 0 6px; font-size: 14px; }
.search button { padding: 8px 14px; border: 0; border-radius: 0 6px 6px 0; background: var(--green); color: #fff; font-weight: 600; cursor: pointer; }
.search button:hover { background: var(--green-dark); }
.search.big { margin: 16px 0; }
.search.big input { flex: 1; border: 1px solid var(--line); }

/* Layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; padding-top: 20px; padding-bottom: 32px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.page-title { font-size: 24px; margin: 0 0 12px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.ad { margin: 12px auto; text-align: center; overflow: hidden; }

/* Cards */
.cards { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
.card { display: flex; align-items: center; gap: 14px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.card-icon img { display: block; width: 48px; height: 48px; object-fit: contain; }
.card-body { flex: 1; min-width: 0; }
.card h2 { font-size: 16px; margin: 0; }
.card .sum { margin: 2px 0; color: #3e4c59; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card .meta { margin: 0; font-size: 12.5px; color: var(--muted); }
.ver { color: var(--muted); font-weight: 400; font-size: .85em; }

/* Buttons */
.btn { display: inline-block; padding: 9px 18px; border-radius: 6px; font-weight: 700; text-align: center; }
.btn-dl { background: var(--green); color: #fff; }
.btn-dl:hover { background: var(--green-dark); text-decoration: none; }
.btn.big { padding: 14px 28px; font-size: 18px; }
.btn small { display: block; font-weight: 400; font-size: 12px; opacity: .9; }

/* Home */
.home-sec { margin-bottom: 28px; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.sec-head h2 { font-size: 20px; margin: 0; }
.sec-head a { font-weight: 600; font-size: 14px; white-space: nowrap; }

/* Pager */
.pager { display: flex; flex-wrap: wrap; gap: 6px; margin: 20px 0; }
.pager a, .pager span { padding: 6px 12px; border-radius: 6px; background: var(--card); border: 1px solid var(--line); }
.pager .cur { background: var(--blue); color: #fff; border-color: var(--blue); }

/* Sidebar */
.box { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 16px; }
.box h3 { margin: 0 0 10px; font-size: 16px; }
.box h3 a { color: var(--text); }
.mini-list { margin: 0; padding-left: 22px; }
.mini-list li { margin: 6px 0; }
.mini-list img { width: 20px; height: 20px; vertical-align: -5px; margin-right: 6px; }
.cat-list { list-style: none; margin: 0; padding: 0; }
.cat-list li { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px dashed var(--line); }
.cat-list span, .cat-box h2 span { color: var(--muted); font-size: 12px; font-weight: 400; }

/* Chip danh mục con */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: -4px 0 16px; }
.chips a { padding: 5px 12px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); font-size: 13.5px; color: var(--text); }
.chips a:hover { border-color: var(--blue); text-decoration: none; }
.chips a.active { background: var(--blue); border-color: var(--blue); color: #fff; }
.chips span { color: var(--muted); font-size: 12px; }
.chips a.active span { color: rgba(255,255,255,.8); }
.cat-subs { margin: 0 0 8px; font-size: 13px; }
.cat-subs a { margin-right: 8px; color: var(--muted); }

/* Categories page */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.cat-box { margin: 0; }
.cat-box h2 { font-size: 17px; margin: 0 0 8px; }
.cat-box ul { margin: 0; padding-left: 18px; font-size: 14px; }

/* Program page */
.prog-head { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.prog-icon { width: 96px; height: 96px; object-fit: contain; }
.prog-info { flex: 1; min-width: 240px; }
.prog-info h1 { margin: 0 0 4px; font-size: 26px; }
.prog-info .sum { margin: 0 0 8px; color: #3e4c59; }
.facts { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px; margin: 0; padding: 0; font-size: 13.5px; color: var(--muted); }
.facts .lic { background: #e8f5ec; color: var(--green-dark); padding: 0 8px; border-radius: 10px; font-weight: 600; }
.stars { position: relative; display: inline-block; width: 80px; height: 14px; vertical-align: -1px; background: linear-gradient(90deg, #d6dbe1 0 0); -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 14'%3E%3Cpath d='M8 0l2.4 4.6 5.1.8-3.7 3.6.9 5L8 11.6 3.3 14l.9-5L.5 5.4l5.1-.8z'/%3E%3C/svg%3E") 0 0/16px 14px repeat-x; mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 14'%3E%3Cpath d='M8 0l2.4 4.6 5.1.8-3.7 3.6.9 5L8 11.6 3.3 14l.9-5L.5 5.4l5.1-.8z'/%3E%3C/svg%3E") 0 0/16px 14px repeat-x; }
.stars span { position: absolute; inset: 0 auto 0 0; background: #f5a623; }
.shots { display: flex; gap: 10px; overflow-x: auto; margin-bottom: 16px; padding-bottom: 4px; }
.shot img { display: block; width: 240px; height: auto; aspect-ratio: 310/174; object-fit: cover; border-radius: 6px; border: 1px solid var(--line); }
.review h2 { margin-top: 0; }
.review h3 { margin: 22px 0 6px; }
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.pros, .cons { border-radius: 6px; padding: 4px 16px 8px; }
.pros { background: #eef8f0; }
.cons { background: #fdf0ef; }
.pros-cons ul { padding-left: 18px; margin: 0; }
.specs table { width: 100%; border-collapse: collapse; }
.specs th, .specs td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.specs th { width: 30%; color: var(--muted); font-weight: 600; }
.specs td { word-break: break-word; }
.versions ul { columns: 2; margin: 0; padding-left: 18px; }
.related h2 { font-size: 20px; }

/* Lightbox */
.lightbox { border: 0; padding: 0; background: transparent; max-width: 95vw; max-height: 95vh; }
.lightbox::backdrop { background: rgba(0,0,0,.85); }
.lightbox img { display: block; max-width: 95vw; max-height: 90vh; }
.lightbox button { position: fixed; top: 12px; right: 16px; font-size: 32px; color: #fff; background: none; border: 0; cursor: pointer; }

/* Download page */
.dl-page { text-align: center; }
.dl-page h1 { margin: 8px 0 16px; }
.countdown { font-size: 17px; }
.dl-info { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; max-width: 520px; margin: 24px auto; text-align: left; font-size: 14px; }
.dl-info dt { color: var(--muted); }
.dl-info dd { margin: 0; word-break: break-all; }
.notfound { text-align: center; }

/* Footer */
.site-footer { background: #1f2933; color: #c5ccd3; padding: 24px 0; font-size: 13px; }
.site-footer a { color: #fff; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 14px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .search { order: 3; width: 100%; margin: 0 0 12px; }
  .search input { flex: 1; width: auto; }
}
@media (max-width: 640px) {
  .header-row { gap: 8px; }
  .nav-toggle { display: block; }
  .main-nav { display: none; order: 2; width: 100%; flex-direction: column; padding-bottom: 8px; }
  .main-nav.open { display: flex; }
  .card { flex-wrap: wrap; }
  .card-btn { width: 100%; }
  .prog-head .btn { width: 100%; }
  .pros-cons { grid-template-columns: 1fr; }
  .versions ul { columns: 1; }
  .specs th { width: 40%; }
}