/* Hệ thiết kế chung của argent.vn và verix.vn — HAI BẢN GIỐNG HỆT NHAU
   (sites/argent-vn/assets/style.css = sites/verix-vn/assets/style.css): sửa một bản, chép sang bản kia.
   Nhịp khối tối ↔ sáng toàn khung, chữ mảnh nhiều khoảng trắng, nét kẻ 1px, ánh bạc–xanh thép.
   Chuyển động chỉ bật khi <html class="js"> (do assets/site.js gắn) và người dùng không chọn giảm chuyển động. */

:root {
  --dark-0: #080b10;
  --dark-1: #0b1017;
  --dark-2: #0f161f;
  --dark-3: #152030;
  --on-dark: #eef2f6;
  --on-dark-2: #b8c3cf;
  --on-dark-3: #8f9cab;
  --line-dark: rgba(196, 212, 230, .14);

  --paper: #ffffff;
  --paper-2: #f3f5f8;
  --ink: #131a23;
  --ink-2: #3d4856;
  --ink-3: #5a6573;
  --line: #dde2e9;

  --accent: #2b67a3;
  --accent-hover: #2f74b8;
  --accent-light: #9cc2e8;

  --metal-text: linear-gradient(100deg, #98a4b4 0%, #f4f7fa 38%, #a9b6c6 55%, #e3e9ef 75%, #8c99aa 100%);
  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --bar-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: var(--bar-h); }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: .005em;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
@supports (overflow: clip) { body { overflow-x: clip; } }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-weight: 500; letter-spacing: -.015em; }
:focus-visible { outline: 2px solid var(--accent-light); outline-offset: 3px; border-radius: 2px; }

.wrap { width: 100%; max-width: calc(var(--wrap) + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 10px 16px; background: var(--paper); color: var(--ink); border-radius: 4px; text-decoration: none;
}
.skip:focus { top: 12px; }

/* ---------- Thanh trên ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--bar-h);
  color: var(--on-dark);
  background: rgba(8, 11, 16, .78);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-dark);
  transition: background-color .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
}
.js .topbar.is-top { background: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
.topbar.is-solid { background: #fff; -webkit-backdrop-filter: none; backdrop-filter: none; color: var(--ink); border-bottom-color: var(--line); }
.topbar .wrap { height: 100%; display: flex; align-items: center; gap: 40px; }

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; flex: none; }
.brand img { height: 28px; width: auto; }
.brand-name { font-weight: 600; font-size: 17px; letter-spacing: .22em; }
.brand .on-light { display: none; }
.topbar.is-solid .brand .on-dark { display: none; }
.topbar.is-solid .brand .on-light { display: block; }

.nav { display: flex; gap: 32px; }
.nav a { font-size: 15px; text-decoration: none; opacity: .82; transition: opacity .2s; padding: 6px 0; }
.nav a:hover { opacity: 1; }
.bar-end { margin-left: auto; display: flex; align-items: center; gap: 12px; }

/* menu điện thoại — <details>: chạy được cả khi tắt JS */
.menu { display: none; }
.menu summary {
  list-style: none; cursor: pointer; width: 44px; height: 44px; display: grid; place-items: center;
  border: 1px solid currentColor; border-radius: 4px; opacity: .85;
}
.menu summary::-webkit-details-marker { display: none; }
.menu summary span, .menu summary span::before, .menu summary span::after {
  display: block; width: 18px; height: 1.5px; background: currentColor; position: relative; content: "";
}
.menu summary span::before { position: absolute; top: -6px; }
.menu summary span::after { position: absolute; top: 6px; }
.menu[open] summary span { background: transparent; }
.menu[open] summary span::before { top: 0; transform: rotate(45deg); }
.menu[open] summary span::after { top: 0; transform: rotate(-45deg); }
.menu-panel {
  position: fixed; left: 0; right: 0; top: var(--bar-h);
  background: var(--dark-1); color: var(--on-dark);
  border-bottom: 1px solid var(--line-dark);
  padding: 8px var(--gutter) 24px;
}
.menu-panel a {
  display: block; padding: 16px 0; font-size: 20px; text-decoration: none;
  border-bottom: 1px solid var(--line-dark);
}
.menu-panel .btn { margin-top: 20px; width: 100%; justify-content: center; border-bottom: 0; font-size: 16px; }

@media (max-width: 860px) {
  .nav, .bar-end .btn { display: none; }
  .menu { display: block; }
}

/* ---------- Nút ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  min-height: 48px; padding: 0 22px;
  font: 500 15px/1 var(--font); letter-spacing: .01em; text-decoration: none;
  border-radius: 3px; border: 1px solid transparent;
  transition: background-color .2s, color .2s, border-color .2s;
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-line { border-color: rgba(238, 242, 246, .45); color: var(--on-dark); }
.btn-line:hover { border-color: var(--on-dark); background: rgba(255, 255, 255, .06); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 500; text-decoration: none;
  color: var(--accent);
}
.link-arrow svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; transition: transform .25s var(--ease); }
.link-arrow:hover svg { transform: translate(3px, -3px); }

/* ---------- Phần mở đầu (tối, dính, khối kế trượt đè lên) ---------- */
.hero { position: relative; height: 140vh; background: var(--dark-0); }
.hero-stage {
  position: sticky; top: 0; height: 100vh; min-height: 620px; overflow: hidden;
  color: var(--on-dark); background: var(--dark-0);
  display: flex; flex-direction: column; justify-content: flex-end;
}
.hero + .sec { margin-top: -40vh; }
.hero-art {
  position: absolute; inset: -4%; width: 108%; height: 108%; max-width: none;
  object-fit: cover; object-position: 60% 40%;
  transform: translate3d(0, calc(var(--hp, 0) * -6%), 0) scale(calc(1 + var(--hp, 0) * .08));
  animation: drift 26s ease-in-out infinite alternate;
}
@keyframes drift { from { translate: 0 0; } to { translate: -2% 1.5%; } }
.hero-stage::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(8, 11, 16, .9) 0%, rgba(8, 11, 16, .55) 48%, rgba(8, 11, 16, .1) 80%),
    linear-gradient(0deg, rgba(8, 11, 16, .95) 0%, rgba(8, 11, 16, 0) 42%),
    linear-gradient(180deg, rgba(8, 11, 16, .7) 0%, rgba(8, 11, 16, 0) 22%);
}
.hero-body {
  position: relative; z-index: 2;
  padding-top: calc(var(--bar-h) + 40px);
  padding-bottom: clamp(32px, 7vh, 72px);
  opacity: calc(1 - var(--hp, 0) * 1.1);
  transform: translate3d(0, calc(var(--hp, 0) * -60px), 0);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 13px; font-weight: 500; letter-spacing: .16em; text-transform: uppercase; color: var(--on-dark-2);
}
.eyebrow::before { content: ""; width: 36px; height: 1px; background: currentColor; opacity: .7; }
.hero h1 {
  margin: 22px 0 0; max-width: 15ch;
  font-size: clamp(40px, 6.6vw, 96px); line-height: 1.04; letter-spacing: -.028em; font-weight: 500;
}
.metal {
  background: var(--metal-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { margin-top: 28px; max-width: 620px; font-size: clamp(17px, 1.4vw, 20px); line-height: 1.6; color: var(--on-dark-2); }
.hero .actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero .note { margin-top: 18px; font-size: 14px; color: var(--on-dark-3); }

.strip {
  position: relative; z-index: 2;
  border-top: 1px solid var(--line-dark);
  opacity: calc(1 - var(--hp, 0) * 1.4);
}
.strip ul {
  list-style: none; margin: 0; padding: 18px 0; display: flex; flex-wrap: wrap; gap: 10px 30px;
  font-size: 14px; color: var(--on-dark-2);
}
.strip li { display: inline-flex; align-items: center; gap: 9px; }
.strip svg { width: 18px; height: 18px; fill: none; stroke: var(--accent-light); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

/* chữ H1 hiện từng chữ (JS tách chữ; tắt JS thì hiện đủ) */
.js .split .w {
  display: inline-block; opacity: 0; filter: blur(10px); transform: translateY(.28em);
  animation: word-in 1s var(--ease) forwards; animation-delay: calc(120ms + var(--i) * 75ms);
}
@keyframes word-in { to { opacity: 1; filter: blur(0); transform: none; } }

/* ---------- Khối ---------- */
.sec { position: relative; z-index: 2; padding: clamp(88px, 11vw, 168px) 0; background: var(--paper); }
.sec-tint { background: var(--paper-2); }
.sec-dark { background: var(--dark-1); color: var(--on-dark); }
.sec-dark .muted { color: var(--on-dark-2); }
.sec-art { overflow: hidden; }
.sec-art > .art {
  position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: cover; pointer-events: none;
  opacity: .9;
}
.sec-art > .wrap { position: relative; }

.head {
  display: grid; grid-template-columns: minmax(180px, 1fr) 3fr; gap: 24px 48px; align-items: start;
}
.label {
  display: flex; align-items: center; gap: 12px; padding-top: .5em;
  font-size: 13px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
}
.label::before { content: ""; width: 24px; height: 1px; background: currentColor; }
.sec-dark .label { color: var(--on-dark-3); }
.head h2, .h2 { font-size: clamp(30px, 3.6vw, 52px); line-height: 1.12; letter-spacing: -.022em; max-width: 20ch; }
.statement { font-size: clamp(20px, 2vw, 28px); line-height: 1.5; font-weight: 400; letter-spacing: -.01em; max-width: 34em; }
.head .statement, .head .sub { margin-top: 28px; }
.sub { font-size: 18px; line-height: 1.65; color: var(--ink-2); max-width: 40em; }
.sec-dark .sub { color: var(--on-dark-2); }

@media (max-width: 760px) {
  .head { grid-template-columns: 1fr; }
  .label { padding-top: 0; }
}

/* sơ đồ "một nguồn dữ liệu" (verix) */
.hub-wrap { display: grid; grid-template-columns: minmax(180px, 1fr) 3fr; gap: 48px; margin-top: 56px; }
.hub-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 48px; align-items: center; }
.hub-grid h2 { max-width: 16ch; }
.hub { width: 100%; max-width: 480px; justify-self: end; color: var(--ink-3); }
.hub text { font: 500 19px var(--font); fill: var(--ink-2); }
.hub .core text { font-size: 17px; font-weight: 600; letter-spacing: .2em; fill: var(--ink); }
.hub .spoke { stroke: var(--line); stroke-width: 1; }
.hub .flow { stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 3 14; opacity: .7; animation: flow 2.4s linear infinite; }
.hub .ring { fill: none; stroke: var(--line); }
.hub .node { fill: var(--paper); stroke: var(--ink-3); stroke-width: 1.2; }
@keyframes flow { to { stroke-dashoffset: -34; } }
@media (max-width: 960px) {
  .hub-grid { grid-template-columns: 1fr; }
  .hub { justify-self: center; }
}
@media (max-width: 560px) { .hub { display: none; } }

/* danh sách kẻ mảnh (phân hệ) */
.rows { margin-top: clamp(56px, 7vw, 96px); border-bottom: 1px solid var(--line); }
.row {
  display: grid; grid-template-columns: minmax(180px, 1fr) 1.25fr 1.75fr; gap: 16px 48px;
  padding: 32px 0; border-top: 1px solid var(--line);
  transition: background-color .3s;
}
.row-meta { display: flex; align-items: center; gap: 18px; color: var(--ink-3); font-size: 14px; font-variant-numeric: tabular-nums; }
.row-meta svg { width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.row h3 { font-size: clamp(20px, 1.7vw, 24px); line-height: 1.3; }
.row p { color: var(--ink-2); }
@media (hover: hover) { .row:hover h3 { color: var(--accent); } }
@media (max-width: 860px) {
  .row { grid-template-columns: 1fr; padding: 26px 0; }
  .row-meta { order: -1; }
}

/* lưới mục đánh số (ngành thép, trụ cột Argent) */
.items {
  list-style: none; margin: clamp(48px, 6vw, 80px) 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 40px;
}
.items li { padding: 26px 0 30px; border-top: 1px solid var(--line-dark); }
.items .n { display: block; font-size: 13px; letter-spacing: .1em; color: var(--on-dark-3); margin-bottom: 14px; font-variant-numeric: tabular-nums; }
.items strong { display: block; font-weight: 500; font-size: 19px; line-height: 1.45; }
.items p { margin-top: 10px; color: var(--ink-2); }
.sec-dark .items p { color: var(--on-dark-2); }
.sec:not(.sec-dark) .items li { border-top-color: var(--line); }
.sec:not(.sec-dark) .items .n { color: var(--ink-3); }
.items h3 { font-size: 22px; line-height: 1.3; }
@media (max-width: 960px) { .items { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .items { grid-template-columns: 1fr; } }

/* ---------- Tấm dính nối tiếp (điểm khác biệt) ---------- */
.stack { position: relative; z-index: 2; background: var(--dark-0); }
.panel {
  position: sticky; top: 0; min-height: 100vh; overflow: hidden;
  display: flex; align-items: center;
  color: var(--on-dark); background: var(--dark-1);
  border-top: 1px solid var(--line-dark);
  box-shadow: 0 -40px 80px rgba(0, 0, 0, .45);
}
.panel:not(:last-child) { margin-bottom: 30vh; } /* dừng lại đọc trước khi tấm sau trượt lên */
.panel:nth-child(2) { background: var(--dark-2); }
.panel:nth-child(3) { background: #0d1520; }
.panel:nth-child(4) { background: var(--dark-3); }
.panel > .art {
  position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: cover; pointer-events: none; opacity: .85;
}
.panel.grid-bg::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(160, 185, 212, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 185, 212, .08) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 70% 50%, #000 0%, transparent 100%);
  mask-image: radial-gradient(ellipse 70% 60% at 70% 50%, #000 0%, transparent 100%);
}
.panel > .art[src$="beams.svg"], .sec-art > .art[src$="beams.svg"] { opacity: .45; }
.panel .wrap { position: relative; padding-top: calc(var(--bar-h) + 48px); padding-bottom: 72px; }
.panel .head h3 { font-size: clamp(28px, 3.4vw, 48px); line-height: 1.14; letter-spacing: -.02em; max-width: 18ch; }
.panel .head p { margin-top: 24px; font-size: clamp(17px, 1.5vw, 21px); line-height: 1.6; color: var(--on-dark-2); max-width: 36em; }
.panel .label { color: var(--on-dark-3); }
.panel .count { color: var(--on-dark); font-variant-numeric: tabular-nums; }

/* ---------- Liên hệ ---------- */
.contact .mail {
  display: inline-flex; align-items: center; gap: .4em; margin-top: 40px;
  font-size: clamp(30px, 5.4vw, 72px); line-height: 1.1; font-weight: 400; letter-spacing: -.02em;
  text-decoration: none; overflow-wrap: anywhere;
  background-image: linear-gradient(currentColor, currentColor); background-size: 0 1px; background-repeat: no-repeat; background-position: 0 100%;
  transition: background-size .5s var(--ease);
}
.contact .mail:hover { background-size: 100% 1px; }
.contact .mail svg { width: .62em; height: .62em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.4; color: var(--accent-light); }
.sec:not(.sec-dark) .contact .mail svg { color: var(--accent); }
.contact .mail-label { display: block; margin-top: 56px; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--on-dark-3); }
.sec:not(.sec-dark) .contact .mail-label { color: var(--ink-3); }
.contact .mail-label + .mail { margin-top: 10px; }

/* ---------- Chân trang ---------- */
.footer { position: relative; z-index: 2; background: var(--paper-2); color: var(--ink); padding: 72px 0 32px; border-top: 1px solid var(--line); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand img { height: 32px; width: auto; }
.foot-brand .brand-name { color: var(--ink); }
.foot-brand p { margin-top: 18px; color: var(--ink-2); font-size: 15px; max-width: 30em; }
.foot-col .foot-h { margin: 0 0 16px; font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.foot-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: 15px; }
.foot-col a { text-decoration: none; color: var(--ink-2); }
.foot-col a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.foot-bottom { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-3); display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
.foot-bottom a { color: var(--ink-2); }
@media (max-width: 600px) { .foot-bottom { padding-right: 56px; } }
@media (max-width: 860px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }
@media (max-width: 420px) { .foot-grid { grid-template-columns: 1fr; } }

/* nút lên đầu trang (chỉ khi có JS) */
.to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 40; width: 44px; height: 44px; border-radius: 50%;
  display: none; place-items: center; text-decoration: none;
  background: var(--paper); color: var(--ink); border: 1px solid var(--line); box-shadow: 0 6px 20px rgba(8, 11, 16, .18);
  opacity: 0; transform: translateY(12px); transition: opacity .3s, transform .3s var(--ease);
}
.to-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.js .to-top { display: grid; pointer-events: none; }
.js .to-top.is-on { opacity: 1; transform: none; pointer-events: auto; }

/* hiện dần khi cuộn tới */
.js [data-reveal] {
  opacity: 0; transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- argent.vn ---------- */
.hero-argent .hero-stage { justify-content: center; }
.hero-argent .hero-body { display: grid; grid-template-columns: 1.25fr 1fr; gap: 48px; align-items: center; }
.hero-argent h1 { max-width: 13ch; font-size: clamp(38px, 5.6vw, 80px); }
.hero-mark { position: relative; justify-self: center; width: min(100%, 440px); }
.hero-mark::before {
  content: ""; position: absolute; inset: -20% -25%; z-index: -1;
  background: radial-gradient(closest-side, rgba(110, 150, 196, .28), transparent 70%);
}
.hero-mark img { width: 100%; height: auto; filter: drop-shadow(0 30px 50px rgba(0, 0, 0, .55)); animation: float 9s ease-in-out infinite alternate; }
@keyframes float { from { transform: translateY(-8px); } to { transform: translateY(10px); } }
.hero-argent .hero-art { opacity: .75; object-position: 30% 50%; }
@media (max-width: 860px) {
  .hero-argent .hero-body { grid-template-columns: 1fr; gap: 28px; }
  .hero-mark { order: -1; justify-self: start; width: clamp(120px, 34vw, 200px); }
}
.logo-argent .brand-name { letter-spacing: .3em; }

.product {
  margin-top: clamp(48px, 6vw, 80px);
  display: grid; grid-template-columns: minmax(180px, 1fr) 3fr; gap: 32px 48px; align-items: start;
}
.product-mark { display: flex; align-items: center; gap: 16px; }
.product-mark img { width: 92px; height: auto; }
.product-mark span { font-size: 26px; font-weight: 600; letter-spacing: .24em; }
.product p { font-size: clamp(19px, 1.8vw, 24px); line-height: 1.55; color: var(--on-dark-2); max-width: 32em; }
.product p strong { color: var(--on-dark); font-weight: 500; }
.product .btn { margin-top: 32px; }
@media (max-width: 760px) { .product { grid-template-columns: 1fr; } }

/* ---------- Màn hình thấp (điện thoại xoay ngang…): bỏ dính để không nội dung nào bị che mãi ---------- */
@media (max-height: 640px), (max-width: 860px) {
  .panel { position: relative; min-height: 0; box-shadow: none; }
  .panel:not(:last-child) { margin-bottom: 0; }
  .panel .wrap { padding-top: 88px; padding-bottom: 88px; }
  .panel > .art, .sec-art > .art { opacity: .35; }
  .panel > .art[src$="beams.svg"], .sec-art > .art[src$="beams.svg"] { opacity: .3; }
}
@media (max-height: 640px) {
  .hero { height: auto; }
  .hero-stage { position: relative; height: auto; min-height: 100vh; }
  .hero + .sec { margin-top: 0; }
}

/* ---------- Giảm chuyển động ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero { height: auto; }
  .hero-stage { position: relative; height: auto; min-height: 100vh; }
  .hero + .sec { margin-top: 0; }
  .hero-art, .hero-mark img { animation: none; transform: none; }
  .hero-body, .strip { opacity: 1; transform: none; }
  .js .split .w { animation: none; opacity: 1; filter: none; transform: none; }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .panel { position: relative; }
  .hub .flow { animation: none; }
  .to-top, .topbar { transition: none; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }