/* PLUMBING ONLY. Copy to assets/base.css and load it BEFORE the client's theme.css.
   No colour, font family, radius or shadow lives here: every one is a var() that theme.css defines
   (the contract is in README.md). If you find yourself typing a colour here, stop. */

/* reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-stopped{overflow:hidden}
body{margin:0;overflow-x:clip;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--text,17px);line-height:1.65;-webkit-font-smoothing:antialiased}
img,video,svg,iframe{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3{font-family:var(--font-display);line-height:1.1;text-wrap:balance}
p,li{text-wrap:pretty}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
.wrap{width:100%;max-width:var(--wrap,1240px);margin-inline:auto;padding-inline:var(--gut,clamp(16px,4vw,48px))}
.skip{position:absolute;left:12px;top:-80px;z-index:200;padding:10px 14px;background:var(--ink);color:var(--bg);text-decoration:none}
.skip:focus{top:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* buttons: never wrap, every tap target at least 44px. Variants (.line, .ghost …) belong to theme.css */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 24px;border:0;border-radius:var(--radius);background:var(--accent);color:var(--accent-ink);font-weight:600;line-height:1;white-space:nowrap;text-decoration:none;cursor:pointer;transition:background-color .3s,color .3s,transform .4s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn.sm{min-height:44px;padding:0 16px}
.acts{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;align-items:center}

/* proposal ribbon */
.ribbon{padding:8px var(--gut,16px);background:var(--dark);color:var(--dark-mute);font-size:14px;line-height:1.4;text-align:center}

/* sticky header: brand left, nav, one action, menu button under the breakpoint */
.hdr{position:sticky;top:0;z-index:50;height:var(--hdr,76px);background:var(--hdr-bg);border-bottom:1px solid transparent;transition:transform .5s var(--ease),border-color .3s}
.hdr.solid{border-bottom-color:var(--line)}
.hdr.hide{transform:translateY(-100%)}
.hdr>.wrap{height:100%;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:12px;min-width:0;margin-right:auto;text-decoration:none}
.brand img{width:var(--logo-w,48px);height:auto;flex:none}
.brand span{min-width:0}
.brand b{display:block;font-family:var(--font-display);font-size:18px;line-height:1.15}
.brand small{display:block;margin-top:2px;color:var(--mute);font-size:14px;line-height:1.3}
.nav>ul{display:flex;align-items:center;gap:4px}
.nav a,.dd>button{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 10px;border:0;border-radius:var(--radius);background:none;color:var(--ink);font-size:15px;font-weight:500;white-space:nowrap;text-decoration:none;cursor:pointer;transition:background-color .25s,color .25s}
.nav a:hover,.dd>button:hover,.dd:focus-within>button{background:var(--hover-bg)}
.nav a[aria-current="page"],.dd:has([aria-current="page"])>button{color:var(--accent);font-weight:600}
.dd{position:relative}
.dd>button svg{width:12px;height:12px;transition:transform .3s}
.dd ul{position:absolute;left:0;top:calc(100% + 6px);min-width:210px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(-4px);transition:opacity .25s,transform .3s var(--ease),visibility .25s}
.dd:hover ul,.dd:focus-within ul{opacity:1;visibility:visible;transform:none}
.dd:hover>button svg,.dd:focus-within>button svg{transform:rotate(180deg)}
.dd ul a{display:flex;width:100%}
.menu-btn{display:none;align-items:center;gap:10px;min-height:44px;padding:0 6px;border:0;background:none;font-weight:600;cursor:pointer}
.menu-btn i{width:22px;height:10px;border-block:2px solid currentColor}
/* one breakpoint for every client; a long nav may raise it in theme.css with the same two rules */
@media (max-width:1180px){.nav,.hdr-cta{display:none}.menu-btn{display:inline-flex}}
@media (max-width:520px){.brand small{display:none}.brand b{font-size:16px}.brand img{width:min(var(--logo-w,48px),42px)}}

/* mobile sheet: a full-screen menu, closed until app.js adds .open */
.sheet{position:fixed;inset:0;z-index:70;display:flex;flex-direction:column;padding:20px var(--gut,16px) 32px;overflow:auto;overscroll-behavior:contain;background:var(--dark);color:var(--dark-ink);opacity:0;visibility:hidden;transition:opacity .35s,visibility .35s}
.sheet.open{opacity:1;visibility:visible;transition:opacity .35s}  /* visible at once, so focus can move in */
.sheet .x{align-self:flex-end;min-height:44px;padding:0 6px;border:0;background:none;font-weight:600;cursor:pointer}
.sheet nav{display:grid;gap:2px;margin-top:18px}
.sheet nav a{display:block;padding:10px 0;border-bottom:1px solid var(--dark-line);font-family:var(--font-display);font-size:clamp(24px,6vw,34px);line-height:1.2;text-decoration:none}
.sheet nav a.sub{padding-left:18px;color:var(--dark-mute);font-family:var(--font-body);font-size:18px}
.sheet nav a[aria-current="page"]{text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.sheet .acts{justify-content:flex-start;margin-top:28px}
.sheet p{margin-top:24px;color:var(--dark-mute);font-size:15px}

/* hero (home) and phero (inner pages): their photo full-bleed, only the h1 on it, in the photo's clearest area.
   data-hero="<sky|side|low|behind|tight|contact-sheet> [top|mid|low] [start|centre|end]" (rules/theme.md §5);
   data-hero-phone takes the position words for the 390px crop. data-scrim adds a soft shade under the h1 only */
.hero,.phero{--_v:center;--_h:center;--_x:50%;--_y:50%;position:relative;display:grid;overflow:hidden;background:var(--dark);color:var(--dark-ink)}
.hero{min-height:calc(100svh - var(--hdr,76px) - 36px)}
.phero{min-height:clamp(440px,64svh,680px)}
[data-hero~=sky],[data-hero~=top]{--_v:start;--_y:0%}
[data-hero~=mid]{--_v:center;--_y:50%}
[data-hero~=low]{--_v:end;--_y:100%}
[data-hero~=side],[data-hero~=start]{--_h:start;--_x:0%}
[data-hero~=centre]{--_h:center;--_x:50%}
[data-hero~=end]{--_h:end;--_x:100%}
@media (max-width:700px){
  [data-hero-phone~=top]{--_v:start;--_y:0%}
  [data-hero-phone~=mid]{--_v:center;--_y:50%}
  [data-hero-phone~=low]{--_v:end;--_y:100%}
  [data-hero-phone~=start]{--_h:start;--_x:0%}
  [data-hero-phone~=centre]{--_h:center;--_x:50%}
  [data-hero-phone~=end]{--_h:end;--_x:100%}
}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.hero-bg>img,.hero-bg>video,.hero-cut{position:absolute;inset:0;width:100%;height:100%;max-width:none;object-fit:cover}
[data-hero~=contact-sheet] .hero-bg{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr)}
[data-hero~=contact-sheet] .hero-bg>img{position:static}
[data-scrim] .hero-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 80% 70% at var(--_x) var(--_y),color-mix(in srgb,var(--hero-shade) 70%,transparent),transparent)}
.hero .copy,.phero .copy{position:relative;z-index:1;display:flex;flex-direction:column;align-self:var(--_v);align-items:var(--_h);text-align:var(--_h);padding-block:clamp(40px,9vh,112px)}
.hero-cut{z-index:2;pointer-events:none}
.hero h1,.phero h1{color:var(--dark-ink);text-shadow:0 2px 28px color-mix(in srgb,var(--hero-shade) 50%,transparent)}
.hero h1{font-size:var(--h1-hero,clamp(32px,6vw,96px));line-height:1.02;max-width:16ch}
[data-hero~=behind] h1{font-size:clamp(64px,14vw,200px);line-height:.95;max-width:none}
.phero h1{font-size:var(--h1-page,clamp(34px,5vw,76px));max-width:20ch}
.hero .lede,.phero .lede{margin-top:20px;max-width:60ch;color:var(--dark-ink);font-size:clamp(17px,1.35vw,20px)}
.hero .acts,.phero .acts{margin-top:30px}

/* sections open one of three ways, data-open on .sec-head (rules/owner.md §3): centred (the fallback),
   aside (the head starts the text column beside a photo) or figure (a big word or number of theirs, the h2
   beside it). No eyebrow; long copy stays left and reading-sized */
.sec{padding-block:var(--sec-pad,clamp(80px,10vw,140px))}
.sec-head{max-width:66ch;margin:0 auto clamp(40px,5vw,64px);text-align:center}
.sec-head h2{margin-inline:auto;font-size:var(--h2,clamp(32px,3.6vw,52px));max-width:24ch}
.sec-head p{max-width:58ch;margin:18px auto 0;color:var(--mute);font-size:clamp(17px,1.3vw,19px)}
.sec-head[data-open=aside],.sec-head[data-open=figure]{margin-inline:0;text-align:start}
[data-open=aside]>h2,[data-open=aside]>p,[data-open=figure]>h2,[data-open=figure]>p{margin-inline:0}
.sec-head[data-open=figure]{display:grid;grid-template-columns:auto minmax(0,1fr);grid-template-areas:"fig h" "fig p";column-gap:clamp(20px,3vw,48px);align-items:end;max-width:none}
[data-open=figure]>h2{grid-area:h}
[data-open=figure]>p{grid-area:p;align-self:start}
.sec-fig{grid-area:fig;font-family:var(--font-display);font-size:clamp(48px,13vw,200px);line-height:1;font-variant-numeric:lining-nums tabular-nums}
@media (max-width:700px){.sec-head[data-open=figure]{grid-template-columns:minmax(0,1fr);grid-template-areas:"fig" "h" "p"}}
.sec-more{display:flex;justify-content:center;margin-top:clamp(36px,4vw,56px)}
.prose{max-width:68ch;font-size:clamp(18px,1.4vw,22px);text-align:left}
.prose>*+*{margin-top:1em}

/* business footer: brand, contact, links, map. 4 columns, then 2, then 1 */
.foot{padding-top:clamp(56px,6vw,80px);background:var(--dark);color:var(--dark-mute);font-size:15px;line-height:1.6}
.foot a{color:var(--dark-ink);text-decoration:none}
.foot a:hover{text-decoration:underline;text-underline-offset:4px}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr .9fr 1.3fr;gap:clamp(28px,3.5vw,48px)}
.foot .brand{margin:0}
.foot .brand b{color:var(--dark-ink)}
.foot .brand small{color:var(--dark-mute)}
.foot-brand p{max-width:38ch;margin-top:16px}
.foot-h{margin-bottom:12px;color:var(--dark-ink);font-family:var(--font-display);font-size:16px;line-height:1.3}
.foot-col ul{display:grid;gap:8px}
.foot-col li,.foot-brand p{overflow-wrap:anywhere}
.foot-col a,.foot-social a,.foot-map>a{display:inline-flex;align-items:center;min-height:44px}
.foot-social{display:flex;flex-wrap:wrap;gap:4px 18px;margin-top:12px}
.foot-map{display:grid;gap:10px;align-content:start}
.foot-map iframe{width:100%;height:220px;border:0;border-radius:var(--radius);background:var(--dark-line)}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:clamp(40px,5vw,56px);padding-block:14px;border-top:1px solid var(--dark-line)}
@media (max-width:1080px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:620px){.foot-grid{grid-template-columns:1fr}}

/* split-heading words (app.js wraps each word) */
.w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.1em;margin-bottom:-.1em}
.w>span{display:inline-block}

/* motion gates: hidden only while the head snippet's .js-motion is on, so no JS = everything visible */
.js-motion [data-rv]{opacity:0;transform:translateY(24px)}
.js-motion .w>span{transform:translateY(105%)}
.js-motion .hero .copy>:not(h1),.js-motion .phero .copy>:not(h1){opacity:0;transform:translateY(16px)}
/* after a view transition the hero slid in already: show it at once, no replay */
.js-motion.vt-in .hero .copy>*,.js-motion.vt-in .phero .copy>*,.js-motion.vt-in .hero .w>span,.js-motion.vt-in .phero .w>span{opacity:1;transform:none}
/* a parallax photo overfills its frame by the distance it travels, so its edge never shows */
.js-motion [data-parallax]{scale:1.09}
/* photos never fade or pop in: every image loads with the page and shows at once (2026-10-02).
   A reveal block that holds a photo, picture or video is never hidden. */
.js-motion [data-rv]:has(img,picture,video){opacity:1;transform:none}
/* hero motion, data-hero-motion="still|drift|lights-on|video": the photo is complete from the first frame.
   drift scales the photo (and the behind cutout) once; lights-on fades the lit grade (img.lit) over the unlit one */
.js-motion [data-hero-motion=drift] .hero-bg>img,.js-motion [data-hero-motion=drift] .hero-cut{animation:mz-drift 14s var(--ease) both}
.js-motion [data-hero-motion=lights-on] .lit{animation:mz-on 2.4s var(--ease) .5s both}
@keyframes mz-drift{from{scale:1}to{scale:1.04}}
@keyframes mz-on{from{opacity:0}}

/* pages flow into each other; the header holds still */
@view-transition{navigation:auto}
.hdr{view-transition-name:site-header}
::view-transition-group(*){animation-duration:.5s;animation-timing-function:var(--ease)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js-motion [data-rv],.js-motion .w>span,.js-motion .hero .copy>:not(h1),.js-motion .phero .copy>:not(h1){opacity:1;transform:none}
  @view-transition{navigation:none}
}

/* phone call bar: thumb reach, below 1024px only; the page bottom is padded only while the bar is there */
.callbar{display:none}
@media (max-width:1023.98px){
  .callbar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:1px;background:var(--dark-line);padding-bottom:env(safe-area-inset-bottom)}
  .callbar a{display:flex;align-items:center;justify-content:center;min-height:52px;background:var(--dark);color:var(--dark-ink);font-weight:600;text-decoration:none}
  .callbar a:first-child{background:var(--accent);color:var(--accent-ink)}
  body:has(.callbar){padding-bottom:calc(52px + env(safe-area-inset-bottom))}
  .hero .copy{padding-bottom:calc(clamp(40px,9vh,112px) + 52px + env(safe-area-inset-bottom))}
}