/* vsislogin.vsis.net v2 — màu theo nhận diện VsisLogin: teal #1c6c86 · navy #073140 · xanh #0064b4 · vàng #ffbe20 */
:root {
  --brand: #1c6c86; --brand-2: #146478; --accent: #0064b4; --navy: #073140; --navy-2: #0b3b4c;
  --gold: #ffbe20; --bg: #f4f7f9; --card: #fff; --text: #1d2a30; --muted: #5d7079; --border: #e1e8ec;
  --cyan: #7ad3e6; --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: 'Be Vietnam Pro', -apple-system, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
svg.i { flex-shrink: 0; vertical-align: -3px; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.wrap.narrow { max-width: 860px; }
.center { text-align: center; }
.muted { color: var(--muted); font-size: 14px; }
code { background: #eef3f5; padding: 1px 6px; border-radius: 5px; font-size: .92em; }

/* Thanh trên */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(7,49,64,.96); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(255,255,255,.08); }
.nav .wrap { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-size: 19px; letter-spacing: -.3px; }
.brand b span { color: var(--gold); }
.brand:hover { text-decoration: none; }
.nav .links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav .links a:not(.btn) { color: rgba(255,255,255,.82); font-size: 14.5px; font-weight: 500; }
.nav .links a:not(.btn):hover, .nav .links a.on { color: #fff; text-decoration: none; }
.nav .links a.on { box-shadow: inset 0 -2px 0 var(--gold); padding-bottom: 4px; }
.burger { display: none; margin-left: auto; background: none; border: 0; color: #fff; cursor: pointer; padding: 6px; }
@media (max-width: 900px) {
  .burger { display: block; }
  .nav .links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--navy); flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 18px; border-bottom: 1px solid rgba(255,255,255,.1); }
  .nav .links.open { display: flex; }
  .nav .links a:not(.btn) { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav .links .btn { margin-top: 12px; justify-content: center; }
}
.crumbs { background: #fff; border-bottom: 1px solid var(--border); font-size: 13px; color: var(--muted); }
.crumbs .wrap { padding-top: 10px; padding-bottom: 10px; white-space: nowrap; overflow-x: auto; }
.crumbs span { color: #9aaab1; margin: 0 2px; }
.crumbs [aria-current] { color: var(--text); }

/* Nút */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px; font-weight: 700; font-size: 15px; border: 0; cursor: pointer; transition: transform .15s, box-shadow .15s; font-family: inherit; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff; box-shadow: 0 6px 18px rgba(28,108,134,.28); }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.25); }
.btn-outline { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.btn-sm { padding: 8px 14px; font-size: 14px; }
.full { width: 100%; justify-content: center; }
.store { display: inline-flex; align-items: center; gap: 11px; background: #000; color: #fff !important; border: 1px solid #333; border-radius: 12px; padding: 9px 18px 9px 14px; transition: transform .15s, box-shadow .15s; }
.store:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 10px 22px rgba(0,0,0,.25); }
.store svg { width: 26px; height: 26px; }
.store span { text-align: left; }
.store small { display: block; font-size: 10.5px; opacity: .85; line-height: 1.2; }
.store b { display: block; font-size: 17px; line-height: 1.2; font-weight: 600; }
.store.full { justify-content: flex-start; }
.more { font-weight: 700; display: inline-flex; align-items: center; gap: 6px; font-size: 14.5px; }

/* Hero */
.hero { background: radial-gradient(900px 420px at 90% -10%, rgba(122,211,230,.22), transparent 60%), linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 50%, var(--brand) 100%); color: #fff; padding: 64px 0 76px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 44px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.15; margin: 14px 0 16px; letter-spacing: -1px; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--gold); }
.hero .lead { font-size: 17.5px; opacity: .9; margin: 0 0 26px; }
.hero .cta, .cta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.cta.center { justify-content: center; margin-top: 22px; }
.pill { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,190,32,.15); color: var(--gold); border: 1px solid rgba(255,190,32,.4); padding: 5px 12px; border-radius: 99px; font-size: 13px; font-weight: 600; }
.pill:hover { text-decoration: none; background: rgba(255,190,32,.25); }
.ticks { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 14px; opacity: .9; }
.ticks li { display: flex; gap: 6px; align-items: center; }
.ticks svg { color: var(--gold); }
.shot { margin: 0; border-radius: 14px; overflow: hidden; box-shadow: 0 30px 70px rgba(0,0,0,.35); border: 1px solid rgba(255,255,255,.15); background: #fff; }
.shot.sm { box-shadow: 0 18px 40px rgba(7,49,64,.14); border-color: var(--border); }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero h1 { font-size: 32px; } .hero { padding: 44px 0 52px; } }

/* Khối nội dung */
.block { padding: 68px 0; }
.block.alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.block.doc { padding: 36px 0 60px; }
.head { text-align: center; max-width: 720px; margin: 0 auto 38px; }
.head p { color: var(--muted); margin: 6px 0 0; }
.eyebrow { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--brand); margin-bottom: 8px; }
.eyebrow.light { color: var(--gold); }
.h2 { font-size: 31px; line-height: 1.25; margin: 0 0 10px; color: var(--navy); letter-spacing: -.5px; }
.h3 { font-size: 22px; color: var(--navy); }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 960px) { .grid3, .grid4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid3, .grid4 { grid-template-columns: 1fr; } .h2 { font-size: 25px; } .block { padding: 48px 0; } }
.card, .use, .post { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; color: var(--text); display: flex; flex-direction: column; transition: transform .15s, box-shadow .15s, border-color .15s; }
a.card:hover, .use:hover, .post:hover { text-decoration: none; transform: translateY(-3px); box-shadow: 0 16px 34px rgba(7,49,64,.09); border-color: rgba(28,108,134,.35); }
.card .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(28,108,134,.1); color: var(--brand); margin-bottom: 14px; }
.card h3, .use h3, .post h3 { font-size: 17px; margin: 0 0 6px; color: var(--navy); }
.card p, .use p, .post p { margin: 0; color: var(--muted); font-size: 14.5px; flex: 1; }
.card .more { margin-top: 14px; }
.use { border-top: 3px solid var(--brand); }
.kicker { font-size: 12px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--brand); margin: 0 0 6px; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.step .n { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--navy); color: var(--gold); font-weight: 800; margin-bottom: 10px; }
.step h3 { margin: 0 0 6px; font-size: 16.5px; color: var(--navy); }
.step p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* Bảng giá */
.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1000px) { .plans { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .plans { grid-template-columns: 1fr; } }
.plan { background: var(--card); border: 2px solid var(--border); border-radius: 16px; padding: 24px 20px; display: flex; flex-direction: column; position: relative; }
.plan.hl { border-color: var(--gold); }
.badge { position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--gold); color: var(--navy); font-size: 11px; font-weight: 800; letter-spacing: .5px; text-transform: uppercase; padding: 4px 10px; border-radius: 6px; white-space: nowrap; }
.badge.alt { background: var(--brand); color: #fff; }
.plan h3 { margin: 0; font-size: 20px; color: var(--navy); }
.plan .sub { color: var(--muted); font-size: 13.5px; margin: 2px 0 12px; }
.plan .price { font-size: 25px; font-weight: 800; color: var(--brand); }
.plan .price small { font-size: 13px; font-weight: 500; color: var(--muted); }
.plan .year { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.plan .year b { color: var(--navy); }
.plan .year em { font-style: normal; color: #b7860b; font-weight: 700; }
.plan ul { list-style: none; padding: 0; margin: 16px 0 20px; flex: 1; }
.plan li { display: flex; gap: 8px; padding: 4px 0; font-size: 14.5px; }
.plan li svg { color: var(--brand); margin-top: 4px; }
.plan .btn { justify-content: center; }
.note-box { display: flex; gap: 14px; align-items: flex-start; background: rgba(28,108,134,.07); border: 1px solid rgba(28,108,134,.22); border-radius: 12px; padding: 16px 18px; margin-top: 22px; font-size: 14.5px; color: var(--navy); }
.note-box svg { color: var(--brand); margin-top: 1px; }

/* Hỏi đáp / phiên bản */
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 0 20px; margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 16px 0; font-weight: 700; color: var(--navy); list-style: none; display: flex; gap: 12px; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary svg { margin-left: auto; color: var(--brand); transition: transform .2s; }
.faq details[open] summary svg { transform: rotate(180deg); }
.faq details > div { color: var(--muted); font-size: 15px; padding-bottom: 6px; }
.rels summary span { color: var(--muted); font-weight: 500; font-size: 14px; }
.rel { color: var(--text) !important; }
.rel h3, .rel h4, .rel h5 { color: var(--navy); margin: 14px 0 6px; font-size: 16px; }
.rel ul { padding-left: 20px; margin: 6px 0; }
.rel-links { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; font-weight: 600; padding-top: 6px; border-top: 1px dashed var(--border); }
.rel-links a { display: inline-flex; align-items: center; gap: 4px; }
.oldlist { padding-left: 18px; } .oldlist small { color: var(--muted); }

/* Dải kêu gọi */
.band { background: linear-gradient(135deg, var(--navy), var(--brand)); color: #fff; border-radius: 20px; padding: 38px 40px; display: flex; gap: 24px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.band h2 { margin: 0 0 6px; font-size: 25px; }
.band p { margin: 0; opacity: .85; }
.band-btns { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* Tiêu đề trang con */
.page-head { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 55%, var(--brand) 100%); color: #fff; padding: 52px 0 56px; text-align: center; }
.page-head.sm { padding: 36px 0 40px; }
.page-head h1 { margin: 0 0 10px; font-size: 38px; letter-spacing: -.8px; line-height: 1.2; }
.page-head p { margin: 0 auto; opacity: .86; max-width: 680px; }
.jump { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 22px; }
.jump a { color: #fff; border: 1px solid rgba(255,255,255,.25); border-radius: 99px; padding: 6px 14px; font-size: 13.5px; }
.jump a:hover { background: rgba(255,255,255,.1); text-decoration: none; }
@media (max-width: 600px) { .page-head h1 { font-size: 29px; } }

/* Trang tính năng */
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; align-items: center; }
.split.rev > :first-child { order: 2; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split.rev > :first-child { order: 0; } }
.tag { display: inline-block; background: rgba(28,108,134,.1); color: var(--brand); font-weight: 700; font-size: 12.5px; padding: 4px 10px; border-radius: 6px; margin-bottom: 10px; }
.lead2 { color: var(--muted); font-size: 16.5px; }
.ticks2 { list-style: none; padding: 0; margin: 14px 0; }
.ticks2 li { display: flex; gap: 10px; padding: 5px 0; }
.ticks2 svg { color: var(--brand); margin-top: 5px; }
.feat-ic { display: grid; place-items: center; height: 260px; border-radius: 18px; background: linear-gradient(135deg, rgba(28,108,134,.08), rgba(0,100,180,.08)); color: var(--brand); border: 1px solid var(--border); }

/* Tải xuống */
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 860px; margin: 0 auto 18px; }
@media (max-width: 700px) { .dl-grid { grid-template-columns: 1fr; } }
.dl { background: var(--card); border: 2px solid var(--border); border-radius: 18px; padding: 30px 24px 24px; position: relative; display: flex; flex-direction: column; gap: 10px; }
.dl.hl { border-color: var(--brand); box-shadow: 0 18px 40px rgba(28,108,134,.15); }
.dl .tile { width: 64px; height: 64px; border-radius: 16px; display: grid; place-items: center; background: #fff; box-shadow: 0 6px 16px rgba(7,49,64,.12), inset 0 0 0 1px rgba(7,49,64,.06); color: var(--brand); }
.dl h2 { margin: 6px 0 0; font-size: 21px; color: var(--navy); }
.dl p { margin: 0 0 8px; color: var(--muted); font-size: 14.5px; flex: 1; }

/* Tài liệu */
.search { display: flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 0 12px; color: var(--muted); }
.search input { border: 0; outline: 0; padding: 10px 0; font: inherit; width: 100%; background: transparent; color: var(--text); }
.search.big { max-width: 560px; margin: 24px auto 0; padding: 4px 16px; box-shadow: 0 12px 30px rgba(0,0,0,.2); }
.doccats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 760px) { .doccats { grid-template-columns: 1fr; } }
.doccat { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.doccat h2 { font-size: 18px; margin: 0 0 10px; }
.doccat h2 a { color: var(--navy); }
.doccat h2 small { color: var(--muted); font-weight: 500; font-size: 13px; }
.doccat ul { margin: 0; padding-left: 18px; }
.doccat li { padding: 3px 0; }
.docs-layout { display: grid; grid-template-columns: 270px 1fr; gap: 32px; align-items: start; }
@media (max-width: 900px) { .docs-layout { grid-template-columns: 1fr; } .side { order: 2; } }
.side-in { position: sticky; top: 80px; max-height: calc(100vh - 100px); overflow-y: auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; font-size: 14px; }
.side-in .search { margin-bottom: 10px; }
.side details { border-top: 1px solid var(--border); padding: 6px 0; }
.side summary { cursor: pointer; list-style: none; display: flex; align-items: center; font-weight: 700; padding: 6px 2px; }
.side summary::-webkit-details-marker { display: none; }
.side summary a { color: var(--navy); }
.side summary svg { margin-left: auto; color: var(--muted); }
.side ul { list-style: none; padding: 0 0 4px 6px; margin: 0; }
.side li a { display: block; padding: 4px 8px; border-radius: 6px; color: var(--text); }
.side li a:hover { background: rgba(28,108,134,.07); text-decoration: none; }
.side li a[aria-current] { background: rgba(28,108,134,.12); color: var(--brand); font-weight: 600; }
.doclist { display: grid; gap: 12px; }
.doclink { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; color: var(--text); }
.doclink:hover { text-decoration: none; border-color: rgba(28,108,134,.4); }
.doclink h3 { margin: 0 0 4px; font-size: 16.5px; color: var(--navy); }
.doclink p { margin: 0; color: var(--muted); font-size: 14px; }

/* Bài viết */
.prose { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 34px 40px; min-width: 0; font-size: 16.5px; }
@media (max-width: 600px) { .prose { padding: 22px 18px; } }
.prose h1 { font-size: 32px; line-height: 1.25; color: var(--navy); margin: 0 0 6px; letter-spacing: -.5px; }
.prose .meta { color: var(--muted); font-size: 13.5px; display: flex; gap: 6px; align-items: center; margin: 0 0 18px; }
.prose h2 { font-size: 23px; color: var(--navy); margin: 32px 0 10px; scroll-margin-top: 80px; }
.prose h3 { font-size: 19px; color: var(--navy); margin: 24px 0 8px; scroll-margin-top: 80px; }
.prose img { border-radius: 10px; border: 1px solid var(--border); margin: 14px auto; }
.prose figure { margin: 16px 0; }
.prose figcaption { text-align: center; color: var(--muted); font-size: 13.5px; }
.prose blockquote { margin: 16px 0; padding: 12px 18px; border-left: 4px solid var(--gold); background: #fffaf0; border-radius: 0 10px 10px 0; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.prose th { background: #f1f6f8; }
.toc { background: #f6f9fa; border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin: 0 0 22px; font-size: 14.5px; }
.toc ul { margin: 6px 0 0; padding-left: 18px; }
.toc li.l3 { margin-left: 14px; list-style: circle; }
.helpbox { margin-top: 32px; padding: 14px 18px; border-radius: 12px; background: rgba(28,108,134,.07); border: 1px solid rgba(28,108,134,.2); font-size: 15px; }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.pn { border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; color: var(--navy); font-weight: 600; }
.pn small { display: block; color: var(--muted); font-weight: 500; font-size: 12.5px; }
.pn.nx { text-align: right; }
.pn:hover { text-decoration: none; border-color: var(--brand); }
.yt { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; background: #000; margin: 16px 0; cursor: pointer; }
.yt img { width: 100%; height: 100%; object-fit: cover; margin: 0; border: 0; border-radius: 0; opacity: .85; }
.yt button { position: absolute; inset: 0; margin: auto; width: 72px; height: 52px; background: none; border: 0; cursor: pointer; }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.prose .aligncenter { margin-left: auto; margin-right: auto; text-align: center; }

/* Chân trang */
.foot { background: var(--navy); color: rgba(255,255,255,.72); padding: 44px 0 26px; font-size: 14px; margin-top: 40px; }
.foot .cols { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 800px) { .foot .cols { grid-template-columns: 1fr 1fr; } }
.foot h4 { color: #fff; margin: 0 0 10px; font-size: 14px; }
.foot a:not(.brand) { color: rgba(255,255,255,.72); display: block; padding: 3px 0; }
.foot a:hover { color: #fff; }
.foot p { margin: 12px 0 0; }
.foot .copy { border-top: 1px solid rgba(255,255,255,.1); margin-top: 28px; padding-top: 18px; font-size: 13px; }

/* Tải xuống: 3 thẻ khi có bản macOS (07/11/2026) */
.dl-grid.three { grid-template-columns: repeat(3, 1fr); max-width: 1080px; }
@media (max-width: 960px) { .dl-grid.three { grid-template-columns: 1fr 1fr; } }
@media (max-width: 700px) { .dl-grid.three { grid-template-columns: 1fr; } }
.dl .mac-tile { color: #111; }
.dl-note { flex: 0 !important; margin: 2px 0 0 !important; font-size: 12.5px !important; text-align: center; }
.dl { scroll-margin-top: 90px; }

/* Tải xuống: tab Windows / macOS (07/11/2026) */
.os-block { padding-top: 40px; }
.os-tabs { display: flex; justify-content: center; gap: 6px; width: max-content; max-width: 100%; margin: 0 auto 40px; padding: 6px; background: #fff; border: 1px solid var(--border); border-radius: 16px; box-shadow: 0 6px 18px rgba(7,49,64,.06); }
.os-tabs button { display: flex; align-items: center; gap: 10px; min-width: 180px; padding: 10px 22px; border: 0; border-radius: 11px; background: transparent; color: var(--navy); font: inherit; cursor: pointer; transition: background .15s, color .15s; }
.os-tabs button svg { width: 24px; height: 24px; flex-shrink: 0; }
.os-tabs button span { text-align: left; line-height: 1.2; }
.os-tabs button b { display: block; font-size: 16px; }
.os-tabs button small { display: block; font-size: 12px; color: var(--muted); }
.os-tabs button:hover { background: var(--bg); }
.os-tabs button[aria-selected="true"] { background: var(--navy); color: #fff; }
.os-tabs button[aria-selected="true"] small { color: rgba(255,255,255,.7); }
.os-tabs button:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.os-panel[hidden] { display: none; }
.os-sub { margin-top: 64px; }
.os-sub.narrow { max-width: 820px; margin-left: auto; margin-right: auto; }
.os-sub .h2 { margin-bottom: 26px; }
.dl-grid.one { grid-template-columns: minmax(0, 430px); justify-content: center; }
@media (max-width: 600px) {
  .os-tabs { width: 100%; }
  .os-tabs button { flex: 1; min-width: 0; padding: 10px 12px; justify-content: center; }
  .os-sub { margin-top: 48px; }
}