/* ============================================================
   MERCIAN — design system
   White ground · black text · gold accent (#B8933D).
   Fraunces / Inter / IBM Plex Mono.
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  /* colour — sampled from the Mercian wordmark */
  --ink:        #201E1D;   /* logo black */
  --ink-soft:   #43403D;
  --gold:       #B8933D;   /* logo gold */
  --gold-bright:#D0AC55;
  --gold-deep:  #8E6F26;   /* gold for text on white (contrast) */
  --paper:      #FFFFFF;
  --soft:       #FAF8F3;   /* whisper warm-white for alt sections */
  --dark:       #201E1D;   /* near-black contrast sections */
  --dark-2:     #14120F;
  --stone:      #6E6862;
  --stone-soft: #8E8880;
  --line:       rgba(32,30,29,.13);
  --line-soft:  rgba(32,30,29,.08);
  --line-dark:  rgba(255,255,255,.16);

  /* type */
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body:    "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* scale */
  --step--1: clamp(.82rem, .8rem + .1vw, .9rem);
  --step-0:  clamp(1rem, .96rem + .2vw, 1.12rem);
  --step-1:  clamp(1.2rem, 1.1rem + .5vw, 1.5rem);
  --step-2:  clamp(1.5rem, 1.3rem + .9vw, 2.1rem);
  --step-3:  clamp(2rem, 1.6rem + 1.9vw, 3.2rem);
  --step-4:  clamp(2.6rem, 1.9rem + 3.3vw, 4.8rem);
  --step-5:  clamp(3.2rem, 2.1rem + 5vw, 6.4rem);

  /* space + shell */
  --shell: 1200px;
  --gutter: clamp(1.2rem, 5vw, 4rem);
  --radius: 14px;
  --radius-sm: 8px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --header-h: 88px;
}

/* Shorter bar on phones — a sticky header shouldn't eat a tenth of the screen.
   Everything keyed to --header-h (nav panel offset, anchor scroll-margin)
   follows automatically. */
@media (max-width:600px){
  :root{--header-h: 72px}
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0}
img,svg{display:block;max-width:100%}
button,input,textarea,select{font:inherit;color:inherit}
a{color:inherit}

body{
  font-family:var(--body);
  font-size:var(--step-0);
  line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- Layout helpers ---------- */
.shell{max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(4rem,8vw,7.5rem)}
.section--tight{padding-block:clamp(3rem,5vw,4.5rem)}
.stack > * + *{margin-top:1.1rem}
.center{text-align:center}
.measure{max-width:62ch}
.measure-sm{max-width:46ch}

/* ---------- Type ---------- */
h1,h2,h3,h4{font-family:var(--display);font-weight:400;line-height:1.08;letter-spacing:-.01em;margin:0;color:var(--ink)}
h1{font-size:var(--step-4)}
h2{font-size:var(--step-3)}
h3{font-size:var(--step-2)}
h4{font-size:var(--step-1)}
p{margin:0}

.eyebrow{
  font-family:var(--mono);
  font-size:var(--step--1);
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-deep);
  display:inline-flex;align-items:center;gap:.7rem;
}
.eyebrow::before{content:"";width:1.6rem;height:2px;background:var(--gold)}
.eyebrow--center{justify-content:center}

.lede{font-size:var(--step-1);line-height:1.5;color:var(--ink-soft);font-weight:400}
.muted{color:var(--stone)}
.serif-em{font-family:var(--display);font-style:italic}

/* ---------- Buttons ---------- */
.btn{
  --bg:var(--gold);--fg:var(--ink);
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--mono);font-size:var(--step--1);
  letter-spacing:.06em;text-transform:uppercase;
  text-decoration:none;cursor:pointer;
  padding:.85rem 1.4rem;border-radius:var(--radius-sm);
  background:var(--bg);color:var(--fg);border:1px solid transparent;
  transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease);
}
.btn:hover{transform:translateY(-2px);background:var(--gold-bright);box-shadow:0 12px 26px -14px rgba(184,147,61,.85)}
.btn:focus-visible{outline:2px solid var(--gold-deep);outline-offset:3px}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{background:var(--ink);color:var(--paper);box-shadow:none}
.btn--on-dark{--fg:var(--ink)}
.btn--ghost-dark{background:transparent;color:var(--paper);border-color:var(--line-dark)}
.btn--ghost-dark:hover{background:var(--paper);color:var(--ink);box-shadow:none}
.btn__arrow{transition:transform .3s var(--ease)}
.btn:hover .btn__arrow{transform:translateX(3px)}

.textlink{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:var(--step--1);letter-spacing:.05em;
  text-transform:uppercase;text-decoration:none;color:var(--gold-deep);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:gap .3s var(--ease),border-color .3s var(--ease)}
.textlink:hover{gap:.9rem;border-color:var(--gold)}

/* ---------- Header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:2rem;height:var(--header-h)}
.brand{display:inline-flex;align-items:center;text-decoration:none;color:var(--ink)}
.brand__logo{height:40px;width:auto;display:block}
@media (max-width:600px){.brand__logo{height:34px}}

.nav__links{display:flex;align-items:center;gap:2rem;list-style:none;margin:0;padding:0}
.nav__links a:not(.btn){
  text-decoration:none;font-size:var(--step--1);font-weight:500;color:var(--ink-soft);
  position:relative;padding-block:.4rem;letter-spacing:.01em;
}
.nav__links a:not(.btn)::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--gold);
  transition:width .3s var(--ease)}
.nav__links a:not(.btn):hover,.nav__links a[aria-current="page"]{color:var(--ink)}
.nav__links a:not(.btn):hover::after,.nav__links a[aria-current="page"]::after{width:100%}
.nav__cta{margin-left:.5rem}

.nav__toggle{display:none;background:none;border:0;cursor:pointer;width:44px;height:44px;position:relative}
.nav__toggle span{position:absolute;left:11px;right:11px;height:2px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s var(--ease)}
.nav__toggle span:nth-child(1){top:16px}
.nav__toggle span:nth-child(2){top:22px}
.nav__toggle span:nth-child(3){top:28px}
.nav__toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:900px){
  .nav__toggle{display:block}
  .nav__links{
    position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:var(--paper);border-bottom:1px solid var(--line);padding:1rem var(--gutter) 2rem;
    /* the panel can outgrow a short viewport, so let it scroll rather than clip */
    max-height:calc(100dvh - var(--header-h));overflow-y:auto;
    /* visibility (not just transform) so the closed panel's links leave the tab order */
    visibility:hidden;
    transform:translateY(-120%);
    transition:transform .4s var(--ease),visibility 0s linear .4s;
    box-shadow:0 24px 40px -24px rgba(32,30,29,.35)}
  .nav__links[data-open="true"]{transform:translateY(0);visibility:visible;transition:transform .4s var(--ease),visibility 0s}
  .nav__links li{width:100%}
  .nav__links a:not(.btn){display:block;padding:1rem 0;font-size:var(--step-0);border-bottom:1px solid var(--line-soft)}
  .nav__cta{margin:1.2rem 0 0}
  .nav__cta .btn{width:100%;justify-content:center}
}

/* ---------- Hero (light) ---------- */
.hero{position:relative;overflow:hidden;background:var(--paper);color:var(--ink);border-bottom:1px solid var(--line)}
.hero__grid{position:absolute;inset:0;opacity:1;pointer-events:none}
.hero__inner{position:relative;padding-block:clamp(5rem,12vw,8.5rem)}
.hero__eyebrow{color:var(--gold-deep)}
.hero h1{margin-top:1.4rem;max-width:16ch;color:var(--ink)}
.hero h1 em{font-style:italic;color:var(--gold-deep)}
.hero__lede{margin-top:1.6rem;max-width:52ch;color:var(--ink-soft);font-size:var(--step-1);line-height:1.5}
.hero__actions{margin-top:2.4rem;display:flex;flex-wrap:wrap;gap:1rem}
.hero__meta{margin-top:3.4rem;display:flex;flex-wrap:wrap;gap:2.6rem;padding-top:1.8rem;border-top:1px solid var(--line)}
.hero__stat b{font-family:var(--display);font-size:var(--step-2);display:block;color:var(--ink);line-height:1}
.hero__stat span{font-family:var(--mono);font-size:var(--step--1);letter-spacing:.12em;text-transform:uppercase;color:var(--gold-deep)}

/* ---------- Section head ---------- */
.head{max-width:60ch}
.head--center{margin-inline:auto;text-align:center}
.head h2{margin-top:1rem}
.head p{margin-top:1.2rem}

/* ---------- Cards / grid ---------- */
.grid{display:grid;gap:1.4rem}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
@media (max-width:940px){.grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid--2,.grid--3,.grid--4{grid-template-columns:1fr}}

.card{
  position:relative;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);padding:2rem 1.9rem;
  transition:transform .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--gold);box-shadow:0 24px 46px -30px rgba(32,30,29,.4)}
.card__no{font-family:var(--mono);font-size:var(--step--1);color:var(--gold-deep);letter-spacing:.14em}
.card__icon{width:44px;height:44px;color:var(--gold-deep);margin-bottom:1.2rem}
.card h3{font-size:var(--step-1);margin-bottom:.7rem}
.card p{color:var(--stone);font-size:var(--step-0)}
.card__link{margin-top:1.3rem}

/* section grounds */
.section--parchment{background:var(--soft)}
.section--dark{background:var(--dark);color:#EDE9E1}
.section--dark .head p,.section--dark .muted{color:rgba(237,233,225,.72)}
.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}
.section--dark .eyebrow{color:var(--gold-bright)}
.section--dark .eyebrow::before{background:var(--gold-bright)}

/* ---------- Service detail rows ---------- */
.service-row{
  display:grid;grid-template-columns:.9fr 1.4fr;gap:clamp(2rem,5vw,5rem);
  align-items:start;padding-block:clamp(3rem,6vw,5rem);border-top:1px solid var(--line)}
.service-row:first-of-type{border-top:0}
@media (max-width:860px){.service-row{grid-template-columns:1fr;gap:1.6rem}}
.service-row__index{font-family:var(--mono);color:var(--gold-deep);letter-spacing:.16em;font-size:var(--step--1)}
.service-row h3{font-size:var(--step-2);margin:.9rem 0 0}
.service-row__body p{color:var(--ink-soft)}
.feature-list{list-style:none;margin:1.4rem 0 0;padding:0;display:grid;gap:.8rem}
.feature-list li{position:relative;padding-left:1.7rem;color:var(--ink-soft)}
.feature-list li::before{content:"";position:absolute;left:0;top:.62em;width:11px;height:2px;background:var(--gold)}

/* ---------- Process / steps ---------- */
.steps{display:grid;gap:1.2rem}
.step{display:grid;grid-template-columns:auto 1fr;gap:1.4rem;align-items:start;padding:1.6rem 0;border-top:1px solid var(--line-dark)}
.step__n{font-family:var(--mono);color:var(--gold-bright);font-size:var(--step--1);letter-spacing:.1em;padding-top:.35em}
.step h4{color:#fff;font-size:var(--step-1)}
.step p{color:rgba(237,233,225,.72);margin-top:.5rem}

/* ---------- Split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,6vw,5rem);align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr}}

/* ---------- Panel / mark visual ---------- */
.crest-panel{
  position:relative;aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;
  background:var(--soft);border:1px solid var(--line);display:grid;place-items:center;padding:2rem}
.crest-panel__lines{position:absolute;inset:0;opacity:1}

/* ---------- Stats ---------- */
/* minmax(0,…) rather than 1fr: the big serif numbers have a wide min-content,
   and a bare 1fr refuses to shrink past it, blowing out narrow screens. */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:2rem}
@media (max-width:760px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.stats{grid-template-columns:1fr;gap:1.5rem}}
.stat b{font-family:var(--display);font-size:var(--step-3);display:block;line-height:1;color:var(--ink)}
.section--dark .stat b{color:var(--gold-bright)}
.stat span{display:block;margin-top:.5rem;font-family:var(--mono);font-size:var(--step--1);letter-spacing:.1em;text-transform:uppercase;color:var(--stone)}
.section--dark .stat span{color:rgba(237,233,225,.7)}

/* ---------- Quote ---------- */
.quote{max-width:22ch;font-family:var(--display);font-size:var(--step-2);line-height:1.28;color:var(--ink)}
.section--dark .quote{color:#fff}
.quote__mark{color:var(--gold);font-size:var(--step-4);line-height:0;display:block;height:.4em}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(120deg,var(--dark) 0%,var(--dark-2) 100%);color:#EDE9E1;border-radius:var(--radius);padding:clamp(2.5rem,6vw,4.5rem)}
.cta-band h2{color:#fff;max-width:18ch}
.cta-band p{margin-top:1rem;color:rgba(237,233,225,.8);max-width:48ch}
.cta-band__actions{margin-top:2rem;display:flex;flex-wrap:wrap;gap:1rem}
.cta-band__lines{position:absolute;right:-30px;top:-30px;opacity:.5;pointer-events:none}

/* ---------- Forms ---------- */
.form{display:grid;gap:1.3rem}
.field{display:grid;gap:.5rem}
.field label{font-family:var(--mono);font-size:var(--step--1);letter-spacing:.08em;text-transform:uppercase;color:var(--stone)}
.field input,.field textarea,.field select{
  width:100%;padding:.9rem 1rem;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius-sm);color:var(--ink);transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(184,147,61,.22)}
.field textarea{min-height:150px;resize:vertical}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:1.3rem}
@media (max-width:560px){.form__row{grid-template-columns:1fr}}
.form__note{font-size:var(--step--1);color:var(--stone)}
.form__status{font-family:var(--mono);font-size:var(--step--1);letter-spacing:.04em;padding:.9rem 1rem;border-radius:var(--radius-sm);display:none}
.form__status[data-state="ok"]{display:block;background:rgba(184,147,61,.1);border:1px solid rgba(184,147,61,.3);color:var(--gold-deep)}
.form__status[data-state="err"]{display:block;background:rgba(168,60,60,.08);border:1px solid rgba(168,60,60,.3);color:#8c2f2f}

/* Invalid fields: a red edge AND a written reason — never colour on its own */
.field :is(input,textarea,select)[aria-invalid="true"]{border-color:#8c2f2f;background:rgba(168,60,60,.03)}
.field :is(input,textarea,select)[aria-invalid="true"]:focus{
  border-color:#8c2f2f;box-shadow:0 0 0 3px rgba(140,47,47,.18)}
.field__error{display:none;font-size:var(--step--1);color:#8c2f2f}
.field__error::before{content:"▲ ";font-size:.8em;vertical-align:.1em}
.field__error[data-shown="true"]{display:block}

/* honeypot — off-screen for bots, unreachable for people */
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

.btn[aria-busy="true"]{opacity:.72;pointer-events:none}

/* contact detail cards */
.contact-cards{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:1.2rem}
@media (max-width:560px){.contact-cards{grid-template-columns:1fr}}
/* the email address is one long unbreakable token — let it break rather than
   force the card wider than the screen */
.contact-card{border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;background:var(--paper);overflow-wrap:anywhere}
.contact-card .eyebrow{margin-bottom:.7rem}
.contact-card a{display:inline-block;padding-block:.2rem;color:var(--gold-deep);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}
.contact-card a:hover{border-color:currentColor}

/* ---------- Prose (legal) ---------- */
.prose{max-width:72ch}
.prose h2{font-size:var(--step-2);margin-top:2.8rem}
.prose h3{font-size:var(--step-1);margin-top:2rem}
.prose p,.prose li{color:var(--ink-soft)}
.prose p+p{margin-top:1rem}
.prose ul,.prose ol{margin:1rem 0;padding-left:1.3rem;display:grid;gap:.5rem}
.prose a{color:var(--gold-deep)}
.prose__meta{font-family:var(--mono);font-size:var(--step--1);letter-spacing:.06em;color:var(--stone);text-transform:uppercase}
.toc{border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.6rem;background:var(--soft);margin-bottom:2.5rem}
.toc ul{list-style:none;margin:.6rem 0 0;padding:0;display:grid;gap:0}
.toc a{display:inline-block;padding-block:.4rem;text-decoration:none;color:var(--gold-deep);font-size:var(--step--1)}
.toc a:hover{text-decoration:underline}

/* ---------- Footer (white) ---------- */
.site-footer{background:var(--paper);color:var(--stone);border-top:1px solid var(--line);padding-block:clamp(3rem,6vw,4.5rem) 2rem}
.site-footer .brand__logo{height:34px}
.footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2.4rem}
@media (max-width:860px){.footer__top{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.footer__top{grid-template-columns:1fr}}
.footer__brand p{margin-top:1.1rem;max-width:34ch;color:var(--stone);font-size:var(--step--1)}
.footer__col h5{font-family:var(--mono);font-size:var(--step--1);letter-spacing:.14em;text-transform:uppercase;color:var(--gold-deep);margin:0 0 1rem}
.footer__col ul{list-style:none;margin:0;padding:0;display:grid;gap:.15rem}
/* padding, not gap, so each link clears the 24px minimum target size */
.footer__col a{display:inline-block;padding-block:.42rem;text-decoration:none;color:var(--ink-soft);font-size:var(--step--1);transition:color .2s}
.footer__col a:hover{color:var(--gold-deep)}
.footer__col li{color:var(--stone);font-size:var(--step--1)}
.footer__bottom{margin-top:3rem;padding-top:1.6rem;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:.4rem 1rem;justify-content:space-between;align-items:center;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;color:var(--stone)}
.footer__bottom a{display:inline-block;padding-block:.4rem;color:inherit}

/* ---------- Focus ---------- */
/* One visible gold ring for everything focusable. .btn keeps its own deeper gold
   so the outline still reads against the gold fill. */
:where(a,button,input,textarea,select,summary,[tabindex]):focus-visible{
  outline:2px solid var(--gold-deep);outline-offset:3px;border-radius:2px}
.section--dark :where(a,button):focus-visible,
.cta-band :where(a,button):focus-visible{outline-color:var(--gold-bright)}

/* Sticky header would otherwise swallow the top of any #anchor target */
[id]{scroll-margin-top:calc(var(--header-h) + 1.5rem)}

/* ---------- Reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  .btn:hover,.card:hover{transform:none}
  .btn:hover .btn__arrow{transform:none}
  .textlink:hover{gap:.5rem}
  /* matches the [data-open] selector's specificity, or the open state keeps animating */
  .nav__links,.nav__links[data-open="true"]{transition:none}
  .nav__toggle span{transition:none}
}

/* mark draw-on */
.draw line{stroke-dasharray:200;stroke-dashoffset:200;animation:draw 1.1s var(--ease) forwards}
.draw line:nth-child(2){animation-delay:.16s}
.draw line:nth-child(3){animation-delay:.3s}
@keyframes draw{to{stroke-dashoffset:0}}
@media (prefers-reduced-motion:reduce){.draw line{animation:none;stroke-dashoffset:0}}

/* skip link */
.skip{position:absolute;left:-999px;top:0;background:var(--gold);color:var(--ink);padding:.7rem 1rem;border-radius:0 0 8px 0;z-index:100;font-family:var(--mono);font-size:var(--step--1)}
.skip:focus{left:0}