/* Theme Name: ZeroY Starter */
/*
 * Visual layer — the design system from preview网站效果.html applied to every
 * page: white ground, one red accent, 1px light lines, sharp media frames,
 * dark-grey footer. Colour, type and spacing values live in assets/css/tokens.css.
 * DESIGN.md rules kept here: red stays an accent (never a section background or
 * footer), cards are white with a 1px line and no shadow, and a shadow appears
 * only on a dropdown panel or on hover.
 * The nav popover's open/close, panel position and focus handling come from
 * assets/wp-behaviors (behavior "popover"); this file only styles its shell.
 */

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body);font-size:1rem;line-height:1.55;color:var(--color-ink);background:var(--color-surface)}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--color-focus);outline-offset:2px}
.site-wrap{width:min(var(--width-site),calc(100% - 48px));margin-inline:auto}
.site-skip{position:absolute;inset-inline-start:var(--gap-2);top:0;z-index:60;padding:var(--gap-1) var(--gap-2);background:var(--color-ink);color:var(--color-surface);border-radius:var(--radius-control);text-decoration:none;transform:translateY(-150%)}
.site-skip:focus{transform:none}

/* ---------- Typography ---------- */
h1,h2,h3,h4{margin:0 0 var(--gap-2);font-weight:600;letter-spacing:-.02em}
h1{font-size:clamp(2.4rem,5.4vw,4.2rem);line-height:1.02;letter-spacing:-.04em}
h2{font-size:clamp(1.75rem,3.2vw,2.6rem);line-height:1.08;letter-spacing:-.03em}
h3{font-size:1.3rem;line-height:1.2;letter-spacing:-.01em;margin-bottom:10px}
h4{font-size:.82rem;letter-spacing:.02em}
p{margin:0 0 var(--gap-2)}
p:last-child{margin-bottom:0}
code{font-size:.85em;color:var(--color-muted)}
.eyebrow{margin:0 0 14px;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--color-brand)}
.lede{max-width:60ch;font-size:1.16rem;color:var(--color-lede)}
.small,.card__note{font-size:.85rem;color:var(--color-muted)}

/* ---------- Buttons ---------- */
.site-btn,.site-cta{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:0 17px;border:1px solid transparent;border-radius:var(--radius-control);font:inherit;font-size:.88rem;font-weight:700;text-decoration:none;cursor:pointer;transition:background-color .2s ease,border-color .2s ease,color .2s ease}
.site-btn--red,.site-cta{background:var(--color-brand);color:var(--color-surface)}
.site-btn--red:hover,.site-cta:hover{background:var(--color-brand-deep)}
.site-btn--ghost{background:var(--color-surface);border-color:var(--color-line-strong);color:var(--color-ink)}
.site-btn--ghost:hover{border-color:var(--color-grey);background:var(--color-soft)}
.site-btn--text{min-height:auto;padding:0;background:none;border:0;color:var(--color-brand)}
.site-btn--text:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- Header + primary navigation ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--color-line);backdrop-filter:saturate(180%) blur(12px)}
.site-header__inner{display:flex;flex-wrap:wrap;align-items:center;gap:var(--gap-2) var(--gap-3);min-height:70px;padding-block:10px}
.site-brand{display:inline-flex;flex-direction:column;gap:6px;text-decoration:none}
.site-brand__mark{font-size:1.02rem;font-weight:800;letter-spacing:.02em;text-transform:uppercase;white-space:nowrap}
.site-brand__rule{width:22px;height:3px;background:var(--color-brand)}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;flex-wrap:wrap;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
.site-nav__item{display:flex}
.site-nav__link,.site-nav__toggle{display:inline-flex;align-items:center;gap:5px;padding:6px 9px;font:inherit;font-size:.875rem;font-weight:600;color:#444;text-decoration:none;background:none;border:0;border-radius:var(--radius-control);cursor:pointer}
.site-nav__link:hover,.site-nav__toggle:hover{color:var(--color-brand);background:color-mix(in srgb,var(--color-ink) 5%,transparent)}
.site-nav__link:focus-visible,.site-nav__toggle:focus-visible{color:var(--color-brand)}
.site-nav__caret{font-size:.7em;line-height:1;color:var(--color-grey);transition:transform .2s ease}
.site-nav__toggle[aria-expanded="true"] .site-nav__caret{transform:rotate(180deg)}
.site-nav__group{position:relative;display:inline-flex}
/* Popover panel shell: the behavior sets position and size inline when open. */
.site-nav__panel{position:absolute;top:calc(100% + 6px);left:0;z-index:30;display:flex;flex-direction:column;gap:2px;min-width:min(15rem,calc(100vw - (2 * var(--gap-3))));padding:var(--gap-1);background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-card);box-shadow:var(--shadow-panel)}
.site-nav__child{display:block;padding:9px var(--gap-2);font-size:.875rem;font-weight:600;color:#444;text-decoration:none;border-radius:var(--radius-control)}
.site-nav__child:hover{color:var(--color-brand);background:var(--color-soft)}
.site-cta{align-self:center}

/* ---------- Bands and grids ---------- */
.section{padding:var(--space-section) 0}
.section--alt{background:var(--color-soft)}
.page-head + .section{padding-top:48px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:34px}
.section-head__text{max-width:62ch}
.section-head__note{max-width:640px;margin:0;color:var(--color-muted)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* ---------- Swatch: CSS stand-in for product photography ---------- */
.media-3x2{aspect-ratio:3/2;position:relative;overflow:hidden;background:var(--color-soft-deep);border-bottom:1px solid var(--color-line)}
.mesh{background-color:#c9cbcd}
.mesh--a{background-image:radial-gradient(circle at 18px 18px,#f2f2f2 0 7px,transparent 7px),radial-gradient(circle at 54px 54px,#f2f2f2 0 7px,transparent 7px),linear-gradient(135deg,#c3c5c7 0 48%,#9a9da0 48% 52%,#c3c5c7 52% 100%);background-size:72px 72px,72px 72px,100% 100%}
.mesh--b{background-image:repeating-linear-gradient(0deg,transparent 0 10px,rgba(255,255,255,.18) 10px 12px),repeating-linear-gradient(60deg,#8b8d90 0 7px,#9b9da0 7px 14px,#abadb0 14px 21px)}
.mesh--c{background-image:radial-gradient(ellipse at center,#eaeaea 0 29%,#a8aaac 30% 48%,#8d8f92 49% 60%,transparent 61%);background-size:44px 30px;background-color:#a5a7a9}
.mesh--d{background-image:repeating-linear-gradient(90deg,#8f9194 0 5px,#9b9da0 5px 11px,#b6b8ba 11px 16px,#9b9da0 16px 22px)}
.mesh--red{background-image:radial-gradient(circle at 22px 22px,#9d0722 0 9px,transparent 10px),radial-gradient(circle at 66px 66px,#9d0722 0 9px,transparent 10px),linear-gradient(145deg,#c50d2f,#a50624);background-size:88px 88px,88px 88px,100% 100%}

/* ---------- Cards ---------- */
.card,.product-card{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-card);overflow:hidden}
.card__body{padding:20px}
.kicker{margin:0 0 8px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--color-grey)}
.card__note{margin-top:10px}
.site-btn--text{margin-top:14px}
.product-card{transition:border-color .18s ease,transform .18s ease}
.product-card:hover{border-color:#bfc0c2;transform:translateY(-2px)}
.product-card h3{font-size:1.05rem;margin-bottom:12px}
.specs{display:grid;grid-template-columns:repeat(2,1fr);gap:9px 16px;margin-top:12px;padding-top:12px;border-top:1px solid var(--color-line)}
.specs span{display:block;font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--color-grey)}
.specs b{font-size:.82rem;font-weight:600}
.badge{display:inline-flex;margin-top:13px;padding:5px 8px;border-radius:999px;font-size:10px;font-weight:800;letter-spacing:.04em}
.badge--green{background:var(--color-green-soft);color:var(--color-green)}
.badge--amber{background:var(--color-amber-soft);color:var(--color-amber)}

/* ---------- Capability row (red top rule, no card shadow) ---------- */
.cap-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cap{display:flex;flex-direction:column;min-height:210px;padding:24px;background:var(--color-surface);border:1px solid var(--color-line);border-top:3px solid var(--color-brand);border-radius:0 0 var(--radius-card) var(--radius-card)}
.cap__index{display:grid;place-items:center;width:38px;height:38px;margin-bottom:28px;border:1px solid var(--color-grey);border-radius:50%;font-size:.8rem;font-weight:800;color:var(--color-brand)}
.cap h3{font-size:1.05rem}
.cap p{font-size:.85rem;color:var(--color-muted)}

/* ---------- Dark band (manufacturing) ---------- */
.manuf{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:stretch}
.manuf__copy{padding:42px;background:var(--color-dark-panel);color:var(--color-surface)}
.manuf__copy .eyebrow{color:var(--color-brand-tint)}
.manuf__copy h2{color:var(--color-surface)}
.manuf__copy p{color:var(--color-dark-text)}
.manuf__list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:28px 0 0;padding:0;list-style:none}
.manuf__list li{padding-top:10px;border-top:1px solid #555;font-size:.82rem;color:var(--color-dark-text)}
.manuf__visual{display:flex;align-items:stretch}
.manuf__visual .media-3x2{width:100%;aspect-ratio:auto;min-height:280px;border:1px solid var(--color-line);border-radius:var(--radius-media)}

/* ---------- Evidence: report sheet + result card ---------- */
.evidence{display:grid;grid-template-columns:.75fr 1.25fr;gap:26px;align-items:center}
.report{padding:16px;background:var(--color-surface);border:1px solid var(--color-line)}
.report__paper{position:relative;height:100%;min-height:300px;background-color:var(--color-surface);background-image:linear-gradient(#fff,#fff),repeating-linear-gradient(0deg,transparent 0 18px,#e2e2e2 18px 19px)}
.report__paper::before{content:"TEST REPORT";position:absolute;left:18px;top:20px;font-size:14px;font-weight:800;letter-spacing:.14em;color:var(--color-brand)}
.report__paper::after{content:"Air permeability\A Test method — pending\A Key result — pending\A Laboratory — pending";white-space:pre;position:absolute;left:18px;top:60px;font-size:11px;line-height:2;color:var(--color-muted)}
.result-card{padding:28px;background:var(--color-surface);border:1px solid var(--color-line)}
.result-card__big{margin:6px 0;font-size:2.4rem;font-weight:800;letter-spacing:-.04em;color:var(--color-ink-deep)}
.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
.result-grid div{padding:12px;border:1px solid var(--color-line)}
.result-grid span{display:block;font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--color-grey)}
.result-grid b{font-size:.82rem;font-weight:600}

/* ---------- Case steps ---------- */
.case{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}
.case-list{display:grid;gap:14px;margin:0;padding:0;list-style:none}
.case-step{display:grid;grid-template-columns:72px 1fr;gap:14px;padding-top:14px;border-top:1px solid var(--color-line)}
.case-step b{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--color-brand)}
.case-step p{margin:0;font-size:.9rem;color:var(--color-muted)}

/* ---------- Homepage hero ---------- */
.hero{padding:74px 0 54px}
.hero__grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
.hero h1{max-width:22ch}
.hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero__meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:44px;padding-top:22px;border-top:1px solid var(--color-line)}
.metric{display:block}
.metric strong{display:block;font-size:1.05rem;font-weight:600}
.metric span{font-size:12px;color:var(--color-muted)}
.metric:hover strong{color:var(--color-brand)}
.hero__visual{position:relative}
.hero__visual .media-3x2{border:1px solid var(--color-line);border-radius:var(--radius-media)}
.corner{position:absolute;top:0;right:0;width:11px;height:100%;background:var(--color-brand)}
.tagbar{position:absolute;left:18px;bottom:18px;display:flex;align-items:center;gap:16px;padding:12px 14px;background:var(--color-surface);border:1px solid var(--color-line);box-shadow:var(--shadow-panel)}
.tagbar b{font-size:12px}
.tagbar span{font-size:11px;color:var(--color-muted)}

/* ---------- Page head and the Planning... placeholder ---------- */
.page-head{padding:64px 0 0}
.page-head__title{margin-bottom:10px;font-size:clamp(2rem,4.4vw,3.4rem)}
.page-head__path{margin:0 0 var(--gap-3);font-size:.85rem;color:var(--color-muted);overflow-wrap:anywhere}
.framework-page{padding:40px;background:var(--color-surface);border:1px solid var(--color-line);border-top:3px solid var(--color-brand);border-radius:0 0 var(--radius-card) var(--radius-card)}
.framework-page__note{margin:0;font-size:1.16rem;letter-spacing:.01em}
.framework-page__meta{margin:var(--gap-3) 0 0;padding-top:var(--gap-2);border-top:1px solid var(--color-line);font-size:.78rem;color:var(--color-muted);overflow-wrap:anywhere}
.placeholder-note{margin:0;font-size:.85rem;color:var(--color-muted)}

/* ---------- Single entry (single.php renders a real post) ---------- */
.site-entry{width:min(var(--width-site),calc(100% - 48px));margin-inline:auto;padding:72px 0 var(--space-section)}
.site-entry__title{margin-bottom:var(--gap-3)}
.site-entry__content{max-width:72ch;font-size:1.02rem}
.site-entry__content>*+*{margin-top:var(--gap-2)}
.site-entry__content>:first-child{margin-top:0}
.site-entry__content>:last-child{margin-bottom:0}
.site-entry__content h2,.site-entry__content h3{margin-top:var(--gap-4)}
.site-entry__content ul,.site-entry__content ol{padding-inline-start:1.25em}
.site-entry__content a{color:var(--color-brand);text-decoration:underline;text-underline-offset:2px}
.site-entry__content blockquote{margin-inline:0;padding-inline-start:var(--gap-2);border-inline-start:3px solid var(--color-brand);color:var(--color-muted)}
.site-entry__content pre{overflow-x:auto;padding:var(--gap-2);background:var(--color-soft);border:1px solid var(--color-line);border-radius:var(--radius-control)}
.site-entry__content table{width:100%;border-collapse:collapse;font-size:.95rem}
.site-entry__content th,.site-entry__content td{padding:var(--gap-1) var(--gap-2);border-bottom:1px solid var(--color-line);text-align:start}
.site-entry__content img{border-radius:var(--radius-media)}
.site-entry__content figcaption{font-size:.85rem;color:var(--color-muted)}
.site-entry__content hr{margin:var(--gap-4) 0;border:0;border-top:1px solid var(--color-line)}

/* ---------- Footer: dark ground, full site index ---------- */
.site-footer{margin-top:var(--space-section);padding:54px 0 26px;background:var(--color-dark);color:#f6f6f6}
.site-footer__grid{display:grid;grid-template-columns:1.2fr 2.6fr;gap:28px}
.site-footer__name{margin:0 0 10px;font-size:1rem;font-weight:800;letter-spacing:.02em;text-transform:uppercase}
.site-footer__tagline{margin:0;max-width:34ch;font-size:.82rem;color:#bdbdbd}
.site-footer__rule{display:block;width:22px;height:3px;margin-top:16px;background:var(--color-brand)}
.site-footer__groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:28px}
.site-footer__heading{margin:0 0 10px;font-size:.82rem;font-weight:700;letter-spacing:.02em;color:#f6f6f6}
.site-footer__list{display:grid;gap:6px;margin:0;padding:0;list-style:none}
.site-footer__list a{font-size:.82rem;color:#bdbdbd;text-decoration:none}
.site-footer__list a:hover{color:var(--color-surface);text-decoration:underline;text-underline-offset:2px}
.site-footer__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:var(--gap-2);margin-top:38px;padding-top:18px;border-top:1px solid var(--color-dark-line);font-size:12px;color:#9e9e9e}
.site-footer__note{max-width:70ch}

/* ---------- Responsive ---------- */
@media (max-width:1050px){
.hero__grid,.manuf,.evidence,.case,.site-footer__grid{grid-template-columns:1fr}
.grid-4,.cap-row{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(2,1fr)}
.manuf__visual .media-3x2{min-height:220px}
}
@media (max-width:680px){
.site-wrap{width:min(100% - 28px,var(--width-site))}
.section{padding:var(--space-section-sm) 0}
.hero{padding:44px 0 40px}
.hero__meta{gap:14px}
.grid-2,.grid-3,.grid-4,.cap-row{grid-template-columns:1fr}
.section-head{display:block}
.section-head__note{margin-top:14px}
.manuf__copy{padding:28px}
.manuf__list,.result-grid,.site-footer__groups{grid-template-columns:1fr}
.site-entry{width:min(100% - 28px,var(--width-site));padding-top:48px}
.framework-page{padding:var(--gap-3)}
}

/* ---------- Centred closing call to action ---------- */
.section-cta{max-width:820px;margin-inline:auto;text-align:center}
.section-cta h2{margin-bottom:18px}
.section-cta .hero__actions{justify-content:center}