/* MSPACEZ Brand Portal — layout layer.
   Built only from the Design System tokens (ds/tokens.css) and components (ds/components/bundle.css).
   Radius 0 · 1.5 px rules · one red signal per view · no shadows except UI overlays. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }
body { margin: 0; background: var(--white); color: var(--text-primary); font-family: var(--font-sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, svg, video, iframe { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.ar, [dir="rtl"] { font-family: var(--font-arabic); }
.tnum { font-feature-settings: "tnum" 1, "lnum" 1; }
.muted { color: var(--text-muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--brand-black); color: var(--white); padding: 12px 16px; font: 600 13px/1 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; text-decoration: none; }
.skip:focus { top: 12px; }

/* ---------- top bar ---------- */
.top { position: sticky; top: 0; z-index: 40; height: 72px; background: var(--white); border-bottom: var(--border-hairline) solid var(--line); }
.top-in { height: 100%; display: flex; align-items: center; gap: var(--space-5); padding: 0 var(--space-5); }
.brand { display: flex; align-items: center; gap: var(--space-4); text-decoration: none; flex: none; }
.brand img { height: 30px; width: auto; }
.brand .ver { font: 600 11px/1.2 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); padding-inline-start: var(--space-4); border-inline-start: 1px solid var(--line); }
.search { position: relative; flex: 1; max-width: 460px; margin-inline-start: auto; }
.search .msz-input { height: 40px; padding-inline-end: 44px; }
.search kbd { position: absolute; inset-inline-end: 10px; top: 50%; transform: translateY(-50%); font: 600 11px/1 var(--font-sans); border: 1px solid var(--line); padding: 4px 6px; color: var(--text-muted); border-radius: var(--radius-xs); background: var(--white); }
.search-results { position: absolute; top: calc(100% + 6px); inset-inline: 0; background: var(--white); border-top: var(--border-rule) solid var(--brand-black); box-shadow: var(--shadow-overlay); max-height: min(70vh, 560px); overflow: auto; display: none; z-index: 60; }
.search-results.open { display: block; }
.search-results a { display: block; padding: 12px 16px; text-decoration: none; border-bottom: 1px solid var(--line); }
.search-results a:hover, .search-results a.on { background: var(--mist); }
.search-results .k { font: 600 10px/1.2 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); }
.search-results .t { font: 600 14px/1.35 var(--font-sans); margin-top: 3px; }
.search-results .x { font: 400 13px/1.45 var(--font-sans); color: var(--graphite); margin-top: 2px; }
.search-results .none { padding: 16px; font-size: 14px; color: var(--text-muted); }
.top-actions { display: flex; align-items: center; gap: var(--space-3); flex: none; }
.menu-btn { display: none; }

/* ---------- layout ---------- */
.layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: calc(100vh - 72px); }
.side { position: sticky; top: 72px; height: calc(100vh - 72px); overflow-y: auto; background: var(--paper); border-inline-end: 1px solid var(--line); padding: var(--space-5) 0 var(--space-7); scrollbar-width: thin; }
.side .grp { padding: 0 var(--space-5); margin-top: var(--space-5); }
.side .grp:first-child { margin-top: 0; }
.side .grp > .msz-label { color: var(--text-muted); font-size: 10px; display: block; padding: 0 0 var(--space-2); }
.side a { display: grid; grid-template-columns: 30px 1fr; align-items: baseline; padding: 7px var(--space-5); margin: 0 calc(var(--space-5) * -1); text-decoration: none; font: 400 14px/1.35 var(--font-sans); color: var(--graphite); }
.side a .n { font: 300 13px/1 var(--font-sans); font-feature-settings: "tnum" 1; color: var(--text-muted); }
.side a:hover { background: var(--mist); color: var(--brand-black); }
.side a[aria-current="page"] { color: var(--brand-black); font-weight: 600; background: var(--white); box-shadow: inset var(--border-signal) 0 0 var(--signal); }
.side a[aria-current="page"] .n { color: var(--brand-black); }
main { min-width: 0; }
.wrap { max-width: 1344px; margin: 0 auto; padding: 0 var(--grid-margin-web); }

/* ---------- page head (mirrors the board header) ---------- */
.ph { display: grid; grid-template-columns: 132px minmax(0, 1fr) minmax(0, 420px); gap: var(--space-5) var(--space-6); align-items: start; padding: var(--space-8) 0 var(--space-6); border-bottom: var(--border-rule) solid var(--brand-black); }
.ph .num { font: 300 96px/0.86 var(--font-sans); letter-spacing: -0.04em; font-feature-settings: "tnum" 1, "lnum" 1; }
.ph .msz-label { color: var(--text-muted); display: block; margin-bottom: var(--space-3); }
.ph h1 { font: 300 56px/1.06 var(--font-sans); letter-spacing: -0.025em; }
.ph h1 b { font-weight: 700; }
.ph .intro { font: 400 15px/1.6 var(--font-sans); color: var(--graphite); padding-top: var(--space-2); }
.ph .meta { grid-column: 2 / -1; display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ---------- section titles ---------- */
.sec { padding: var(--space-8) 0 0; }
.sech { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2) var(--space-4); padding-bottom: var(--space-4); margin-bottom: var(--space-5); border-bottom: 1px solid var(--line); }
.sech h2 { font: 600 28px/1.2 var(--font-sans); letter-spacing: -0.012em; }
.sech p { font: 400 14px/1.5 var(--font-sans); color: var(--text-muted); max-width: 720px; }
.sech .end { margin-inline-start: auto; display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- on this page ---------- */
.otp { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); border-top: var(--border-rule) solid var(--brand-black); margin-top: var(--space-6); }
.otp a { padding: 14px 16px 14px 0; text-decoration: none; border-bottom: 1px solid var(--line); display: flex; gap: 12px; align-items: baseline; font: 500 14px/1.35 var(--font-sans); }
.otp a span { font: 300 13px/1 var(--font-sans); font-feature-settings: "tnum" 1; color: var(--text-muted); min-width: 22px; }
.otp a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- guideline (PRINCIPLE · RULE · WHEN · WHEN NOT · DO · DON'T) ---------- */
.gl { border-top: var(--border-rule) solid var(--brand-black); display: grid; grid-template-columns: 1fr 1.6fr 1fr 1fr 1.2fr 1.2fr; }
.gl > div { padding: var(--space-4) var(--space-4) var(--space-5); border-inline-start: 1px solid var(--line); font: 400 14px/1.55 var(--font-sans); }
.gl > div:first-child { border-inline-start: 0; padding-inline-start: 0; }
.gl .msz-label { color: var(--text-muted); display: flex; align-items: center; gap: 8px; margin-bottom: var(--space-3); font-size: 10px; }
.gl .principle p { font: 300 22px/1.3 var(--font-sans); letter-spacing: -0.01em; }
.gl ul { list-style: none; padding: 0; }
.gl li { padding-inline-start: 20px; position: relative; margin-bottom: 6px; }
.gl li::before { position: absolute; inset-inline-start: 0; font-weight: 700; }
.gl .do li::before { content: "✓"; }
.gl .dont li::before { content: "✕"; }
.gl-example { display: flex; gap: var(--space-3); align-items: baseline; padding: var(--space-3) 0; border-top: 1px solid var(--line); font-size: 14px; color: var(--graphite); }
.gl-example .msz-label { color: var(--text-muted); font-size: 10px; flex: none; }
.gl-title { font: 600 22px/1.3 var(--font-sans); margin: var(--space-6) 0 var(--space-3); }
.gl-title:first-child { margin-top: 0; }

/* ---------- board viewer ---------- */
.board { margin-top: var(--space-5); }
.board-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-3) 0; border-top: var(--border-rule) solid var(--brand-black); }
.board-bar .msz-label { color: var(--graphite); }
.board-tools { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.seg { display: inline-flex; border: 1px solid var(--brand-black); border-radius: var(--radius-xs); }
.seg button { height: 30px; padding: 0 12px; border: 0; background: var(--white); cursor: pointer; font: 600 11px/1 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; }
.seg button + button { border-inline-start: 1px solid var(--brand-black); }
.seg button[aria-pressed="true"] { background: var(--brand-black); color: var(--white); }
.board-frame { position: relative; border: 1px solid var(--line); background: var(--white); overflow: hidden; }
.board-frame.actual { overflow-x: auto; }
.board-scaler { position: relative; transform-origin: 0 0; }
.board-frame iframe { max-width: none; border: 0; background: var(--white); transform-origin: 0 0; }
.board-frame .loading { position: absolute; inset: 0; display: grid; place-items: center; font: 600 11px/1 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); background: var(--paper); }
.board-frame .loading::after { content: ""; position: absolute; top: 0; left: 0; height: 1.5px; width: 30%; background: var(--brand-black); animation: msz-load 1.2s var(--ease-measured) infinite; }
@keyframes msz-load { from { left: 0; } to { left: 70%; } }
.board-outline { display: flex; flex-wrap: wrap; gap: 6px; padding: var(--space-3) 0 var(--space-2); }
.board-outline button { border: 1px solid var(--line); background: var(--white); height: 30px; padding: 0 12px; cursor: pointer; font: 500 12px/1 var(--font-sans); border-radius: var(--radius-xs); }
.board-outline button:hover { border-color: var(--brand-black); }
.board-note { font: 500 13px/1.45 var(--font-sans); color: var(--text-muted); padding-top: var(--space-2); }

/* ---------- component previews ---------- */
.cmp { padding: var(--space-7) 0 0; }
.cmp-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-3) var(--space-5); align-items: end; border-bottom: var(--border-rule) solid var(--brand-black); padding-bottom: var(--space-3); }
.cmp-head h2 { font: 600 28px/1.2 var(--font-sans); letter-spacing: -0.012em; }
.cmp-head .msz-label { color: var(--text-muted); display: block; margin-bottom: 6px; }
.cmp-desc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-5); padding: var(--space-4) 0; font-size: 14px; color: var(--graphite); }
.cmp-desc p:first-child { font: 300 20px/1.45 var(--font-sans); color: var(--brand-black); }
.cmp-frame { border: 1px solid var(--line); background: var(--white); overflow-x: auto; }
.cmp-frame iframe { width: 100%; border: 0; }
.code { position: relative; margin-top: var(--space-3); background: var(--mist); border-top: var(--border-rule) solid var(--brand-black); }
.code pre { margin: 0; padding: var(--space-4); overflow: auto; max-height: 420px; font: 400 12.5px/1.6 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre; tab-size: 2; }
.code .copy { position: absolute; top: 10px; inset-inline-end: 10px; }
details.code-toggle { margin-top: var(--space-3); }
details.code-toggle > summary { cursor: pointer; list-style: none; display: inline-flex; }
details.code-toggle > summary::-webkit-details-marker { display: none; }
.classlist { display: flex; flex-wrap: wrap; gap: 6px; margin-top: var(--space-2); }
.classlist code { font: 500 12px/1 ui-monospace, Menlo, monospace; background: var(--mist); padding: 5px 7px; }

/* ---------- live class reference ---------- */
.ref { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 0; border-top: var(--border-rule) solid var(--brand-black); }
.ref > div { border-bottom: 1px solid var(--line); border-inline-end: 1px solid var(--line); padding: var(--space-4); min-height: 150px; display: flex; flex-direction: column; gap: var(--space-3); }
.ref .demo { flex: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.ref .cls { display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.ref .cls code { font: 600 12px/1 ui-monospace, Menlo, monospace; }

/* ---------- swatches & tokens ---------- */
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: var(--space-4); }
.sw { border-top: var(--border-rule) solid var(--brand-black); background: var(--white); box-shadow: inset 0 0 0 1px var(--line); display: flex; flex-direction: column; text-align: start; }
.sw .chip { display: block; height: 112px; width: 100%; border: 0; border-bottom: 1px solid var(--line); position: relative; cursor: pointer; padding: 0; }
.sw .copyable { font: inherit; color: inherit; width: fit-content; }
.sw .body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 4px; }
.sw .name { font: 600 14px/1.3 var(--font-sans); display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.sw .hex { font: 500 13px/1.3 ui-monospace, Menlo, monospace; }
.sw .var { font: 500 12px/1.3 ui-monospace, Menlo, monospace; color: var(--text-muted); }
.sw .use { font: 400 12.5px/1.5 var(--font-sans); color: var(--graphite); margin-top: 4px; }
.sw:hover .chip::after { content: "Copy"; position: absolute; inset-inline-end: 8px; bottom: 8px; font: 600 10px/1 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; background: var(--white); color: var(--brand-black); padding: 6px 8px; border: 1px solid var(--brand-black); }
.tag { display: inline-block; font: 600 9.5px/1 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; padding: 4px 6px; border: 1px solid var(--brand-black); }
.tag.solid { background: var(--brand-black); color: var(--white); }
.tag.dashed { border-style: dashed; }
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: start; font: 600 10px/1.2 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); padding: 10px 12px 10px 0; border-bottom: var(--border-rule) solid var(--brand-black); vertical-align: bottom; }
.tbl td { padding: 12px 12px 12px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl code, .mono { font: 500 12.5px/1.4 ui-monospace, Menlo, monospace; }
.tbl-wrap { overflow-x: auto; }
.copyable { cursor: pointer; border: 0; background: none; padding: 0; text-align: start; text-decoration: underline dotted var(--silver); text-underline-offset: 3px; }
.copyable:hover { text-decoration-color: var(--brand-black); }
.bar { height: 16px; background: var(--brand-black); }
.radius-demo { width: 72px; height: 48px; border: 1.5px solid var(--brand-black); background: var(--mist); }
.ratio-demo { background: var(--mist); border: 1px solid var(--brand-black); display: grid; place-items: center; font: 600 11px/1 var(--font-sans); letter-spacing: .1em; }
.motion-track { position: relative; height: 28px; border-bottom: 1px solid var(--line); }
.motion-track .msz-marker { position: absolute; inset-inline-start: 0; top: 8px; }
.motion-track.run .msz-marker { inset-inline-start: calc(100% - 12px); }

/* ---------- cards & grids ---------- */
.grid { display: grid; gap: var(--space-5); }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card-link { text-decoration: none; display: flex; flex-direction: column; }
.card-link .body { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-link .media { aspect-ratio: 4 / 3; background-position: top center; border-bottom: 1px solid var(--line); }
.card-link h3 { font: 600 18px/1.3 var(--font-sans); }
.card-link .num { font: 300 28px/1 var(--font-sans); font-feature-settings: "tnum" 1; }
.card-link .msz-label { color: var(--text-muted); }
.card-link p { font-size: 13.5px; line-height: 1.5; color: var(--graphite); }
.card-link:hover h3 { text-decoration: underline; text-underline-offset: 4px; }
.card-link:hover { box-shadow: inset 0 0 0 1px var(--brand-black); }
.card-link .media.alt { background: var(--paper); display: grid; place-content: center; gap: 10px; padding: 16px; }
.card-link .media.alt .ig { display: grid; grid-template-columns: repeat(4, 36px); gap: 14px 18px; }
.card-link .media.alt .ig img { width: 36px; height: 36px; object-fit: contain; }
.card-link .media.alt .row { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; align-items: center; }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); min-height: 560px; border-bottom: var(--border-rule) solid var(--brand-black); }
.hero-sheet { background: var(--paper); padding: var(--space-8) var(--grid-margin-web) 0; display: flex; flex-direction: column; }
.hero-sheet .msz-label { color: var(--text-muted); display: flex; align-items: center; gap: 10px; }
.hero-sheet h1 { font: 300 72px/1.02 var(--font-sans); letter-spacing: -0.03em; margin-top: var(--space-5); }
.hero-sheet h1 b { font-weight: 700; }
.hero-sheet .msz-lead { margin-top: var(--space-5); max-width: 560px; color: var(--graphite); }
.hero-sheet .actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-6) 0 var(--space-7); }
.hero-sheet .msz-info { margin-top: auto; margin-inline: calc(var(--grid-margin-web) * -1); }
.hero-photo { position: relative; background: var(--mist) center / cover no-repeat; min-height: 360px; }
.hero-photo figcaption { position: absolute; inset-inline-start: var(--space-5); bottom: var(--space-5); background: var(--paper); padding: 8px 12px; font: 500 12px/1.3 var(--font-sans); }
.principles { counter-reset: p; border-top: var(--border-rule) solid var(--brand-black); }
.principles li { list-style: none; display: grid; grid-template-columns: 72px minmax(0, 260px) minmax(0, 1fr); gap: var(--space-4); padding: var(--space-4) 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.principles .n { font: 300 40px/1 var(--font-sans); font-feature-settings: "tnum" 1; }
.principles h3 { font: 600 17px/1.35 var(--font-sans); }
.principles p { font-size: 14.5px; color: var(--graphite); }
.principles { padding: 0; }
.open-list { padding: 0; list-style: none; border-top: var(--border-rule) solid var(--brand-black); }
.open-list li { display: flex; gap: 12px; align-items: baseline; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.open-list li .tag { flex: none; }

/* ---------- downloads ---------- */
.dl-group { border-top: var(--border-rule) solid var(--brand-black); }
.dl-row { display: grid; grid-template-columns: 56px minmax(0, 1fr) auto auto; gap: var(--space-4); align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.dl-row .th { width: 56px; height: 42px; background: var(--mist) center / contain no-repeat; display: grid; place-items: center; font: 600 10px/1 var(--font-sans); letter-spacing: .08em; color: var(--graphite); border: 1px solid var(--line); }
.dl-row .th img { max-width: 44px; max-height: 32px; }
.dl-row .nm { font: 600 14px/1.35 var(--font-sans); overflow-wrap: anywhere; }
.dl-row .ds { font: 400 13px/1.45 var(--font-sans); color: var(--text-muted); }
.dl-row .sz { font: 500 12px/1 var(--font-sans); color: var(--text-muted); font-feature-settings: "tnum" 1; white-space: nowrap; }
.bundle { display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-5); background: var(--white); border-top: var(--border-rule) solid var(--brand-black); box-shadow: inset 0 0 0 1px var(--line); }
.bundle h3 { font: 600 18px/1.3 var(--font-sans); }
.bundle p { font-size: 13.5px; color: var(--graphite); flex: 1; }
.bundle .row { display: flex; justify-content: space-between; align-items: center; gap: 12px; }

/* ---------- logo tiles ---------- */
.logo-tile { aspect-ratio: 16 / 10; display: grid; place-items: center; padding: 10%; border: 1px solid var(--line); position: relative; }
.logo-tile img { max-height: 100%; width: auto; }
.logo-tile .plate { background: var(--paper); padding: 6% 8%; display: grid; place-items: center; width: 70%; }
.logo-tile .lbl { position: absolute; inset-inline-start: 12px; top: 10px; font: 600 10px/1 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; }

/* ---------- photo & icon library ---------- */
.photos { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: var(--space-5); }
.photo figure { border-top: var(--border-rule) solid var(--brand-black); }
.photo img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--mist); }
.photo figcaption { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 0; font: 500 13px/1.4 var(--font-sans); border-bottom: 1px solid var(--line); }
.toolbar { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; margin-bottom: var(--space-5); }
.toolbar .msz-input { max-width: 320px; }
.icons { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); border-top: var(--border-rule) solid var(--brand-black); }
.icon { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: var(--space-5) var(--space-3) var(--space-4); border-bottom: 1px solid var(--line); border-inline-end: 1px solid var(--line); text-decoration: none; text-align: center; }
.icon .glyph { height: var(--isz, 48px); width: var(--isz, 48px); display: grid; place-items: center; }
.icon img { width: 100%; height: 100%; object-fit: contain; }
.icon .nm { font: 500 12px/1.35 var(--font-sans); color: var(--graphite); }
.icon .grp { font: 600 9.5px/1 var(--font-sans); letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); }
.icon:hover { background: var(--mist); }
.icon:hover .nm { color: var(--brand-black); text-decoration: underline; }
.plans { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: var(--space-4); }
.plans a { text-decoration: none; border-top: var(--border-rule) solid var(--brand-black); box-shadow: inset 0 0 0 1px var(--line); padding: var(--space-4); display: flex; flex-direction: column; gap: 10px; }
.plans img { width: 100%; aspect-ratio: 5 / 4; }
.plans a:hover { box-shadow: inset 0 0 0 1px var(--brand-black); }

/* ---------- type tester ---------- */
.tester { border-top: var(--border-rule) solid var(--brand-black); }
.tester-controls { display: flex; flex-wrap: wrap; gap: var(--space-4) var(--space-6); align-items: end; padding: var(--space-4) 0; border-bottom: 1px solid var(--line); }
.tester-controls label { display: flex; flex-direction: column; gap: 6px; }
.tester-controls .msz-label { color: var(--text-muted); font-size: 10px; }
.tester-controls input[type="range"] { width: 180px; accent-color: var(--brand-black); }
.tester-out { padding: var(--space-6) 0; border-bottom: 1px solid var(--line); outline: none; overflow-wrap: anywhere; }
.weights { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); border-top: 1px solid var(--line); }
.weights div { padding: var(--space-4) var(--space-3) var(--space-4) 0; border-bottom: 1px solid var(--line); }
.weights .s { font-size: 40px; line-height: 1.1; }
.weights .m { font: 600 10px/1.2 var(--font-sans); letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); margin-top: 6px; }
.weights .m.used { color: var(--brand-black); }

/* ---------- prev / next ---------- */
.pn { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin: var(--space-9) 0 var(--space-8); }
.pn a { text-decoration: none; border-top: var(--border-rule) solid var(--brand-black); padding: var(--space-4) 0; display: flex; flex-direction: column; gap: 6px; }
.pn a.next { text-align: end; align-items: flex-end; }
.pn .msz-label { color: var(--text-muted); }
.pn .t { font: 300 28px/1.15 var(--font-sans); letter-spacing: -0.015em; }
.pn a:hover .t { font-weight: 600; }

/* ---------- footer (info block signature) ---------- */
.foot { border-top: 1px solid var(--line); background: var(--white); }
.foot .msz-info { height: auto; min-height: 64px; flex-wrap: wrap; }
.foot .msz-info > :first-child { width: 64px; }
.foot .msz-info .cta { text-decoration: none; min-height: 64px; padding: 0 22px; }
.foot-note { padding: var(--space-4) 0 var(--space-6); font: 400 12.5px/1.6 var(--font-sans); color: var(--text-muted); }

/* ---------- toast ---------- */
.toast { position: fixed; inset-inline-start: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 90; background: var(--brand-black); color: var(--white); padding: 12px 18px; font: 600 12px/1 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; display: flex; gap: 10px; align-items: center; box-shadow: var(--shadow-overlay); transition: opacity var(--motion-ui-base) var(--ease-measured), transform var(--motion-ui-base) var(--ease-measured); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast .msz-marker { width: 8px; height: 8px; }

/* ---------- mobile navigation (S19: black panel, logo on off-white plate) ---------- */
.mnav { position: fixed; inset: 0; z-index: 80; background: var(--brand-black); color: var(--white); display: none; flex-direction: column; overflow-y: auto; }
.mnav.open { display: flex; }
.mnav-top { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; border-bottom: 1px solid var(--graphite); position: sticky; top: 0; background: var(--brand-black); }
.mnav-top .plate { background: var(--logo-plate); padding: 8px 10px; display: inline-flex; }
.mnav-top .plate img { height: 24px; width: auto; }
.mnav-close { min-height: 44px; min-width: 44px; background: none; border: 1.5px solid var(--white); color: var(--white); cursor: pointer; font: 600 12px/1 var(--font-sans); letter-spacing: .08em; text-transform: uppercase; padding: 0 14px; }
.mnav .grp { padding: 16px 20px 4px; }
.mnav .grp > .msz-label { color: var(--silver); font-size: 10px; display: block; margin-bottom: 6px; }
.mnav a { display: grid; grid-template-columns: 34px 1fr; padding: 12px 0; border-bottom: 1px solid var(--graphite); text-decoration: none; font: 400 16px/1.3 var(--font-sans); color: var(--white); }
.mnav a .n { color: var(--silver); font-weight: 300; font-feature-settings: "tnum" 1; }
.mnav a[aria-current="page"] { font-weight: 600; }
.mnav a[aria-current="page"]::after { content: ""; width: 12px; height: 12px; background: var(--signal); justify-self: end; align-self: center; grid-column: 2; grid-row: 1; }

/* ---------- responsive ---------- */
@media (max-width: 1279px) {
  .wrap { padding: 0 24px; }
  .hero-sheet { padding-inline: 24px; } .hero-sheet .msz-info { margin-inline: -24px; }
  .ph { grid-template-columns: 96px minmax(0, 1fr); }
  .ph .num { font-size: 72px; }
  .ph .intro { grid-column: 2; }
  .gl { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gl > div:nth-child(3n+1) { border-inline-start: 0; padding-inline-start: 0; }
  .gl > div:nth-child(n+4) { border-top: 1px solid var(--line); }
  .g4 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 1099px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .side { display: none; }
  .menu-btn { display: inline-flex; }
  .top-actions .msz-btn.dl { display: none; }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero-photo { min-height: 320px; order: -1; }
  .g4, .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cmp-desc { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 719px) {
  html { scroll-padding-top: 76px; }
  .top { height: 64px; } .top-in { padding: 0 16px; gap: 12px; }
  .side, .layout { min-height: 0; }
  .brand img { height: 24px; } .brand .ver { display: none; }
  .search { max-width: none; }
  .search kbd { display: none; }
  .wrap { padding: 0 20px; }
  .hero-sheet { padding: var(--space-7) 20px 0; } .hero-sheet .msz-info { margin-inline: -20px; }
  .hero-sheet h1 { font-size: 44px; }
  .ph { grid-template-columns: minmax(0, 1fr); padding-top: var(--space-7); gap: var(--space-3); }
  .ph .num { font-size: 56px; }
  .ph h1 { font-size: 36px; }
  .ph .intro, .ph .meta { grid-column: 1; }
  .sec { padding-top: var(--space-7); }
  .sech h2, .cmp-head h2 { font-size: 22px; }
  .gl { grid-template-columns: minmax(0, 1fr); }
  .gl > div { border-inline-start: 0 !important; padding-inline-start: 0 !important; border-top: 1px solid var(--line); }
  .gl > div:first-child { border-top: 0; }
  .g2, .g3, .g4 { grid-template-columns: minmax(0, 1fr); }
  .principles li { grid-template-columns: 48px minmax(0, 1fr); }
  .principles li p { grid-column: 2; }
  .principles .n { font-size: 28px; }
  .pn { grid-template-columns: minmax(0, 1fr); }
  .pn .t { font-size: 22px; }
  .dl-row { grid-template-columns: 48px minmax(0, 1fr) auto; }
  .dl-row .sz { display: none; }
  .cmp-head { grid-template-columns: minmax(0, 1fr); }
  .foot .msz-info > div:not(:first-child):not(.cta) { display: none; }
  .hero .msz-info > div:nth-child(n+3):not(.cta) { display: none; }
  .swatches { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .sw .chip { height: 72px; }
  .sw .use { display: none; }
  .msz-spec { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .msz-spec > div:nth-child(odd) { border-inline-start: 0; }
  .msz-spec > div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .msz-spec .v { font-size: 26px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }
@media print { .top, .side, .pn, .foot, .board-tools { display: none !important; } .layout { display: block; } }