/* ============================================================
   ROOTWORTH — SHARED SHELL  (redesign lab 2026-10)
   Header, mobile nav, scroll hairline, buttons, brush links,
   footer, focus + motion guards. Ships sitewide; tokens mirror
   rootworth.css v1.0 "Discern, then strike" so it can sit on
   top of the live design system without fighting it.
   ============================================================ */

:root{
  --sumi:#16130f; --sumi-soft:#221d17; --kozo:#f3ead9; --kozo-deep:#e7d9c1;
  --forest:#1d3a2b; --forest-2:#24402f; --jade:#6f9d7c; --jade-dim:#41684f;
  --cinnabar:#b8402a; --cinnabar-2:#9a3320; --lantern:#d9a94e; --lantern-deep:#7d5410;
  --patina:#6b6b5e; --ink-on-dark:#ece3d2; --ink-muted:#a99c84; --ink-body:#5a5345;
  --rule:rgba(29,58,43,.22); --rule-dark:rgba(236,227,210,.16);

  --serif:"Spectral","Spectral fb",Georgia,"Times New Roman",serif;
  --sans:"Inter","Inter fb",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,monospace;
  --cjk:"Noto Serif SC","Songti SC","STSong",serif;

  --step--1:clamp(.84rem,.81rem + .15vw,.93rem);
  --step-0:clamp(1rem,.96rem + .25vw,1.15rem);
  --step-1:clamp(1.2rem,1.1rem + .5vw,1.5rem);
  --step-2:clamp(1.55rem,1.3rem + 1.1vw,2.25rem);
  --step-3:clamp(2.1rem,1.6rem + 2.4vw,3.6rem);
  --step-4:clamp(2.6rem,1.7rem + 4.6vw,6rem);

  --measure:64ch; --gap:clamp(1rem,.6rem + 1.6vw,2rem);
  --bay:clamp(3.5rem,2rem + 6vw,8rem);
  --edge:clamp(1rem,.5rem + 3vw,4rem);
  --maxw:1180px; --head-h:64px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --focus:var(--lantern-deep);
}

/* Fallback faces sized toward the web fonts to keep layout still on swap */
@font-face{font-family:"Spectral fb";src:local("Georgia");size-adjust:104%;ascent-override:92%;descent-override:30%}
@font-face{font-family:"Inter fb";src:local("Arial"),local("Helvetica");size-adjust:107%;ascent-override:90%;descent-override:22%}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--head-h) + 12px)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--kozo);color:var(--sumi);font-family:var(--serif);
  font-size:var(--step-0);line-height:1.62;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:clip}
img,svg,canvas{max-width:100%}
img{display:block;height:auto}
a{color:inherit}
p{margin:0 0 1em;max-width:var(--measure)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;line-height:1.08;letter-spacing:-.012em;margin:0}
button{font:inherit;color:inherit}
::selection{background:var(--cinnabar);color:var(--kozo)}
[lang|="zh"],.cjk{font-family:var(--cjk);font-weight:500;letter-spacing:0}

/* Focus — lantern on dark grounds, deep lantern on paper (both ≥3:1) */
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:2px}
.rw-dark{--focus:var(--lantern)}
.rw-vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--edge)}

/* ---- skip link ---------------------------------------------- */
.rw-skip{position:absolute;left:1rem;top:-100px;z-index:200;background:var(--lantern);
  color:var(--sumi);padding:.8rem 1.1rem;font-family:var(--sans);font-weight:600;
  text-decoration:none;border-radius:2px}
.rw-skip:focus{top:.6rem;outline-color:var(--sumi)}

/* ---- buttons ------------------------------------------------ */
.rw-btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  min-height:48px;padding:.85em 1.45em;font-family:var(--sans);font-weight:600;
  font-size:var(--step--1);letter-spacing:.04em;text-decoration:none;border-radius:2px;
  border:1px solid transparent;cursor:pointer;position:relative;
  transition:transform .2s var(--ease),background-color .2s,color .2s,border-color .2s}
.rw-btn--ink{background:var(--sumi);color:var(--kozo)}
.rw-btn--ink:hover{background:var(--forest)}
.rw-btn--seal{background:var(--cinnabar-2);color:var(--kozo)}
.rw-btn--seal:hover{background:var(--cinnabar)}
.rw-btn--ghost{background:transparent;border-color:currentColor}
.rw-btn--ghost:hover{color:var(--cinnabar-2)}
.rw-dark .rw-btn--ghost:hover{color:var(--lantern)}
.rw-btn--light{background:var(--kozo);color:var(--sumi)}
.rw-btn--light:hover{background:var(--lantern)}
.rw-btn:hover{transform:translateY(-1px)}
.rw-btn .rw-arrow{transition:transform .25s var(--ease)}
.rw-btn:hover .rw-arrow{transform:translateX(3px)}

/* ---- brush-stroke link hover -------------------------------- */
/* A dry-brush stroke (inline SVG) grows under the word on hover/focus. */
.rw-brush{text-decoration:none;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 12' preserveAspectRatio='none'%3E%3Cpath d='M2 8.2C30 5.6 62 4.8 96 5.6s70 2 102-.9l-.6 3.1C165 10.7 131 9.6 97 9 63 8.4 33 8.9 3 10.6z' fill='%23b8402a'/%3E%3C/svg%3E") no-repeat 0 100%/0% .38em;
  padding-bottom:.18em;transition:background-size .45s var(--ease),color .2s}
.rw-brush:hover,.rw-brush:focus-visible,.rw-brush[aria-current="page"]{background-size:100% .38em}
.rw-dark .rw-brush{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 12' preserveAspectRatio='none'%3E%3Cpath d='M2 8.2C30 5.6 62 4.8 96 5.6s70 2 102-.9l-.6 3.1C165 10.7 131 9.6 97 9 63 8.4 33 8.9 3 10.6z' fill='%23d9a94e'/%3E%3C/svg%3E")}
.rw-prose a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.2em}

/* ---- header ------------------------------------------------- */
.rw-head{position:sticky;top:0;z-index:100;background:rgba(22,19,15,.94);
  color:var(--ink-on-dark);border-bottom:1px solid var(--rule-dark)}
@supports (backdrop-filter:blur(1px)){.rw-head{background:rgba(22,19,15,.86);backdrop-filter:saturate(120%) blur(10px)}}
.rw-head__in{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  max-width:var(--maxw);margin-inline:auto;padding-inline:var(--edge);min-height:var(--head-h)}
.rw-brand{display:inline-flex;align-items:center;gap:.65rem;text-decoration:none;
  color:var(--kozo);font-family:var(--serif);font-size:1.2rem;letter-spacing:.02em;min-height:44px}
.rw-seal{display:inline-grid;place-items:center;width:1.75em;height:1.75em;
  background:var(--cinnabar-2);color:var(--kozo);font-family:var(--cjk);font-weight:700;
  font-size:.92em;line-height:1;border-radius:2px;flex:0 0 auto}
.rw-nav{display:flex;align-items:center}
.rw-nav__list{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:1.3rem;
  font-family:var(--sans);font-size:.86rem;letter-spacing:.02em}
.rw-nav__list a:not(.rw-btn){display:inline-flex;align-items:center;min-height:44px;color:var(--ink-on-dark)}
.rw-nav__list a:not(.rw-btn):hover{color:var(--lantern)}
.rw-nav__cta .rw-btn{min-height:44px;padding:.6em 1.1em}
.rw-nav__toggle{display:none;align-items:center;justify-content:center;gap:.55rem;
  min-width:48px;min-height:48px;padding:0 .8rem;background:none;color:var(--ink-on-dark);
  border:1px solid var(--rule-dark);border-radius:2px;cursor:pointer;font-family:var(--sans);
  font-size:.82rem;letter-spacing:.08em;text-transform:uppercase}
.rw-burger{position:relative;width:18px;height:12px;display:inline-block}
.rw-burger::before,.rw-burger::after,.rw-burger span{content:"";position:absolute;left:0;right:0;
  height:1.5px;background:currentColor;transition:transform .3s var(--ease),opacity .2s}
.rw-burger::before{top:0}.rw-burger::after{bottom:0}
.rw-burger span{top:50%;margin-top:-.75px}
.rw-nav__toggle[aria-expanded="true"] .rw-burger::before{transform:translateY(5.25px) rotate(45deg)}
.rw-nav__toggle[aria-expanded="true"] .rw-burger::after{transform:translateY(-5.25px) rotate(-45deg)}
.rw-nav__toggle[aria-expanded="true"] .rw-burger span{opacity:0}

/* scroll-progress hairline */
.rw-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;pointer-events:none;overflow:hidden}
.rw-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--cinnabar),var(--lantern));
  transform-origin:0 50%;transform:scaleX(var(--rw-p,0))}
@supports (animation-timeline:scroll()){
  @media (prefers-reduced-motion:no-preference){
    .rw-progress span{animation:rw-prog linear both;animation-timeline:scroll(root)}
  }
}
@keyframes rw-prog{from{transform:scaleX(0)}to{transform:scaleX(1)}}

@media (max-width:1023.98px){
  .js .rw-nav__toggle{display:inline-flex}
  .js .rw-nav__list{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:0;padding:.5rem var(--edge) 1.4rem;background:var(--sumi-soft);border-bottom:1px solid var(--rule-dark);
    font-size:1.05rem;max-height:calc(100vh - var(--head-h));overflow-y:auto;
    visibility:hidden;opacity:0;transform:translateY(-6px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility 0s linear .22s}
  .js .rw-nav__list.is-open{visibility:visible;opacity:1;transform:none;transition:opacity .22s var(--ease),transform .22s var(--ease)}
  .js .rw-nav__list li{border-bottom:1px solid var(--rule-dark)}
  .js .rw-nav__list li.rw-nav__cta{border:0;padding-top:1rem}
  .js .rw-nav__list a:not(.rw-btn){display:flex;min-height:52px}
  .js .rw-nav__cta .rw-btn{width:100%;min-height:52px}
  /* no-JS: wrap links under the brand instead of hiding them */
  .no-js .rw-head__in{flex-wrap:wrap;padding-block:.5rem}
  .no-js .rw-nav__list{flex-wrap:wrap;gap:.2rem 1rem}
}

/* ---- footer ------------------------------------------------- */
.rw-foot{background:#100e0b;color:var(--ink-muted);font-family:var(--sans);
  font-size:var(--step--1);padding:var(--bay) 0 2.2rem;position:relative;overflow:hidden}
.rw-foot__grid{display:grid;gap:2.4rem;grid-template-columns:1fr}
@media (min-width:760px){.rw-foot__grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}
.rw-foot__creed{font-family:var(--serif);font-size:var(--step-2);color:var(--ink-on-dark);
  font-weight:300;line-height:1.15;max-width:16ch;margin-bottom:1.4rem}
.rw-foot h2{font-family:var(--sans);font-size:.74rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--lantern);font-weight:600;margin-bottom:.8rem}
.rw-foot ul{list-style:none;margin:0;padding:0}
.rw-foot li a{display:inline-flex;align-items:center;min-height:44px;color:var(--ink-on-dark)}
.rw-foot__legal{margin-top:3rem;padding-top:1.6rem;border-top:1px solid var(--rule-dark);
  display:grid;gap:1rem;font-size:.84rem;line-height:1.6}
.rw-foot__legal p{max-width:92ch;margin:0}
.rw-foot__care{color:var(--ink-on-dark)}
.rw-foot__base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.6rem 1.4rem;margin-top:1.4rem;color:var(--ink-muted)}
.rw-foot__mark{position:absolute;right:-.08em;bottom:-.28em;font-family:var(--cjk);font-weight:700;
  font-size:min(42vw,26rem);line-height:1;color:var(--ink-on-dark);opacity:.035;pointer-events:none;user-select:none}

/* ---- motion guard ------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
}
@media print{.rw-head,.rw-foot,.rw-skip{display:none}body{background:#fff}}

/* Slim sticky intake bar (phones). Replaces the theme's .rw-sticky-cta, which is
   suppressed on this template. Safe-area aware; sits under the sticky header (z 100). */
.rw-dock{display:none}
@media (max-width:768px){
  .rw-dock{display:block;position:fixed;left:0;right:0;bottom:0;z-index:90;
    background:var(--cinnabar-2);padding-bottom:env(safe-area-inset-bottom,0px);
    box-shadow:0 -6px 18px rgba(0,0,0,.28)}
  .rw-dock a{display:flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;
    color:var(--kozo);text-decoration:none;font-family:var(--sans);font-size:.95rem;font-weight:600;letter-spacing:.04em}
  .rw-dock a:focus-visible{outline:3px solid var(--lantern);outline-offset:-3px}
  body{padding-bottom:calc(48px + env(safe-area-inset-bottom,0px))}
}