/* =========================================================
   Quill & Cipher — Museum of Secret Writing
   Type: Zilla Slab (display/slab) + Space Mono (cipher medium)
   Palette: aged dark vellum · brass · oxblood · ink
   ========================================================= */

:root{
  --ink:#100b06;
  --bg:#1a140c;
  --bg-2:#20180d;
  --panel:#261c10;
  --panel-2:#2f2314;
  --line:rgba(200,162,74,.20);
  --line-soft:rgba(200,162,74,.12);

  --vellum:#ece0c6;
  --vellum-dim:#b6a888;
  --vellum-faint:#8c7f63;

  --brass:#c8a24a;
  --brass-bright:#e6c67a;
  --brass-deep:#9a7a30;

  --oxblood:#8f2d22;
  --oxblood-bright:#c14a34;

  --maxw:1180px;
  --pad:clamp(1.15rem,5vw,4rem);
  --r:14px;

  --f-disp:"Zilla Slab",Georgia,serif;
  --f-mono:"Space Mono","SFMono-Regular",ui-monospace,monospace;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:
    radial-gradient(120% 80% at 50% -10%, #241a0e 0%, var(--bg) 46%, var(--ink) 100%) fixed;
  color:var(--vellum);
  font-family:var(--f-mono);
  font-size:clamp(.94rem,.9rem + .2vw,1.02rem);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* film grain / brass haze overlay */
.grain{
  position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.5;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

::selection{background:var(--oxblood);color:var(--vellum)}

a{color:inherit;text-decoration:none}
img,svg{max-width:100%}
h1,h2,h3{font-family:var(--f-disp);font-weight:600;line-height:1.02;margin:0}
em{font-style:italic;color:var(--brass-bright)}
b{font-weight:700}

.skip{
  position:absolute;left:-999px;top:0;z-index:100;
  background:var(--brass);color:var(--ink);padding:.6rem 1rem;border-radius:0 0 8px 0;font-weight:700;
}
.skip:focus{left:0}

:focus-visible{outline:2px solid var(--brass-bright);outline-offset:3px;border-radius:3px}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.7rem var(--pad);
  background:linear-gradient(to bottom, rgba(16,11,6,.92), rgba(16,11,6,.6) 70%, transparent);
  backdrop-filter:blur(7px);
}
.brand{display:inline-flex;align-items:center;gap:.55rem;color:var(--brass);font-family:var(--f-disp);font-weight:700}
.brand__mark{color:var(--brass);flex:none}
.brand__word{font-size:1.18rem;letter-spacing:.02em;color:var(--vellum);white-space:nowrap}
.brand__amp{color:var(--oxblood-bright);margin:0 .12em;font-style:italic}
.topnav{display:flex;align-items:center;gap:clamp(.6rem,1.6vw,1.4rem);font-family:var(--f-mono);font-size:.8rem}
.topnav a{color:var(--vellum-dim);letter-spacing:.03em;transition:color .25s}
.topnav a:hover{color:var(--brass-bright)}
.topnav__guide{color:var(--brass)!important;border:1px solid var(--line);padding:.35rem .7rem;border-radius:20px}
.topnav__guide:hover{border-color:var(--brass);background:rgba(200,162,74,.08)}
@media (max-width:720px){
  .topnav a:not(.topnav__guide){display:none}
}

/* ---------- shared bits ---------- */
.eyebrow{
  font-family:var(--f-mono);font-size:.74rem;letter-spacing:.32em;text-transform:uppercase;
  color:var(--brass);margin:0 0 1.1rem;
}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--f-mono);font-size:.82rem;font-weight:700;letter-spacing:.04em;
  padding:.8rem 1.4rem;border-radius:30px;cursor:pointer;border:1px solid transparent;
  transition:transform .2s ease, background .25s, border-color .25s, color .25s;
}
.btn--sm{padding:.55rem 1rem;font-size:.74rem}
.btn:active{transform:translateY(1px)}
.btn--brass{background:var(--brass);color:var(--ink);box-shadow:0 8px 24px -12px rgba(200,162,74,.6)}
.btn--brass:hover{background:var(--brass-bright)}
.btn--ghost{background:transparent;color:var(--brass);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--brass);background:rgba(200,162,74,.08)}

.section-head{max-width:min(760px,92vw);margin:0 auto clamp(2.2rem,5vw,3.5rem);padding:0 var(--pad)}
.section-head--center{text-align:center}
.section-index{
  font-family:var(--f-mono);font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--oxblood-bright);display:block;margin-bottom:.9rem;
}
.section-title{font-size:clamp(1.9rem,1.4rem + 3.2vw,3.4rem);letter-spacing:-.01em;color:var(--vellum)}
.section-sub{color:var(--vellum-dim);margin:.9rem 0 0;font-size:1rem;max-width:52ch}
.section-head--center .section-sub{margin-inline:auto}

section{position:relative;z-index:2;padding-block:clamp(3.4rem,8vw,6.5rem)}

/* ---------- HERO ---------- */
.hero{
  min-height:clamp(560px,92vh,900px);
  display:flex;flex-direction:column;justify-content:center;
  padding:clamp(3rem,9vh,6rem) var(--pad) 3rem;
  overflow:hidden;
}
.hero__drift{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.5}
.hero__inner{position:relative;z-index:2;max-width:var(--maxw);margin-inline:auto;width:100%}
.hero__title{
  font-size:clamp(3.6rem,11vw,9rem);font-weight:700;letter-spacing:-.02em;
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.1em .28em;margin:.2rem 0 1.4rem;
}
.hero__line{display:inline-block;color:var(--vellum)}
.hero__line--ox{color:var(--brass-bright)}
.hero__amp{color:var(--oxblood-bright);font-family:var(--f-disp);font-style:italic;font-size:.7em}
.hero__lede{max-width:56ch;font-size:clamp(1rem,.96rem + .4vw,1.2rem);color:var(--vellum-dim);margin:0 0 2rem}
.hero__lede em{white-space:nowrap}
.hero__cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-bottom:2.8rem}
.hero__stats{display:flex;flex-wrap:wrap;gap:clamp(1.4rem,5vw,3.4rem);margin:0;border-top:1px solid var(--line-soft);padding-top:1.6rem}
.hero__stats dt{font-family:var(--f-disp);font-weight:700;font-size:clamp(1.6rem,4vw,2.4rem);color:var(--brass);line-height:1}
.hero__stats dd{margin:.35rem 0 0;font-size:.76rem;letter-spacing:.06em;color:var(--vellum-faint);text-transform:uppercase}
.hero__scroll{position:absolute;left:50%;bottom:1.2rem;transform:translateX(-50%);z-index:2;
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.28em;text-transform:uppercase;color:var(--vellum-faint)}
.hero__scroll span{position:relative}
.hero__scroll span::after{content:"";display:block;width:1px;height:26px;margin:.5rem auto 0;background:linear-gradient(var(--brass),transparent);animation:drop 2.2s ease-in-out infinite}
@keyframes drop{0%,100%{opacity:.3;transform:scaleY(.6)}50%{opacity:1;transform:scaleY(1)}}

/* decode churn cell */
.dc{color:var(--brass);opacity:.9}

/* ---------- COLLECTION ---------- */
.exhibit{
  max-width:var(--maxw);margin:0 auto;padding:clamp(1.6rem,4vw,2.4rem) var(--pad);
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(1.6rem,5vw,4rem);
  align-items:center;
}
.exhibit + .exhibit{border-top:1px solid var(--line-soft)}
.exhibit--rev .exhibit__plate{order:2}
.exhibit__plate{
  position:relative;padding:clamp(1rem,3vw,2rem);border:1px solid var(--line);border-radius:var(--r);
  background:
    radial-gradient(120% 120% at 30% 20%, rgba(200,162,74,.06), transparent 60%),
    var(--bg-2);
  display:flex;align-items:center;justify-content:center;
}
.exhibit__plate::before{content:"";position:absolute;inset:8px;border:1px solid var(--line-soft);border-radius:calc(var(--r) - 5px);pointer-events:none}
.plate-art{width:100%;max-width:340px;height:auto;display:block}
.exhibit__cat{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--oxblood-bright)}
.exhibit__name{font-size:clamp(1.5rem,1.2rem + 1.8vw,2.3rem);color:var(--vellum);margin:.5rem 0 .8rem}
.exhibit__body p{color:var(--vellum-dim);margin:0 0 1.3rem;max-width:46ch}

.tryit{border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;background:rgba(16,11,6,.4)}
.tryit__tag{display:inline-block;font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink);background:var(--brass);padding:.18rem .5rem;border-radius:5px;margin-bottom:.8rem;font-weight:700}
.tryit__row{display:flex;align-items:center;gap:.7rem;flex-wrap:wrap;font-size:.8rem;color:var(--vellum-dim);letter-spacing:.04em}
.tryit__range{flex:1;min-width:120px;accent-color:var(--brass);height:4px}
.tryit__text{
  flex:1;min-width:120px;background:var(--ink);border:1px solid var(--line);color:var(--brass-bright);
  font-family:var(--f-mono);padding:.45rem .6rem;border-radius:6px;letter-spacing:.14em;text-transform:uppercase;
}
.tryit__io{font-family:var(--f-mono);font-size:.86rem;margin:.9rem 0 0;color:var(--vellum);letter-spacing:.08em;display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.tryit__io--stack{flex-direction:column;align-items:flex-start;gap:.35rem}
.tryit__plain{color:var(--vellum-faint)}
.tryit__arrow{color:var(--oxblood-bright)}
.tryit__cipher{color:var(--brass-bright);font-weight:700}
.tryit__mono{letter-spacing:.16em;word-break:break-all}
.tryit__btn{
  font-family:var(--f-mono);font-size:.78rem;color:var(--brass);background:transparent;border:1px solid var(--line);
  padding:.5rem .9rem;border-radius:8px;cursor:pointer;transition:.2s;letter-spacing:.04em;
}
.tryit__btn:hover{border-color:var(--brass);background:rgba(200,162,74,.08)}
.tryit__btn--sm{margin-top:.7rem;font-size:.72rem;padding:.4rem .75rem}
.tryit output{color:var(--brass-bright);font-weight:700}

/* ---------- TIMELINE ---------- */
.tl{
  max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);list-style:none;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:1px;
  background:var(--line-soft);border:1px solid var(--line-soft);border-radius:var(--r);overflow:hidden;
}
.tl__item{background:var(--bg-2);padding:clamp(1.3rem,3vw,2rem);position:relative;transition:background .3s}
.tl__item:hover{background:var(--panel)}
.tl__item::before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--brass),transparent)}
.tl__year{font-family:var(--f-mono);font-size:.76rem;letter-spacing:.14em;color:var(--oxblood-bright);text-transform:uppercase}
.tl__name{font-size:1.35rem;color:var(--brass-bright);margin:.4rem 0 .6rem}
.tl__item p{color:var(--vellum-dim);font-size:.9rem;margin:0}

/* ---------- CIPHER WHEEL ---------- */
.wheel__stage{
  max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,5vw,4rem);align-items:center;
}
.wheel__disc{display:flex;flex-direction:column;align-items:center;gap:1.2rem}
.disc{width:100%;max-width:360px;height:auto;touch-action:none;cursor:grab;filter:drop-shadow(0 20px 40px rgba(0,0,0,.5))}
.disc:active{cursor:grabbing}
/* SVG groups rotated via CSS: origin measured in the viewBox coordinate system */
#disc-inner,.rotor-ring,.pk-shackle,.pk-key{transform-box:view-box}
#disc-inner{transform-origin:160px 160px}
.rotor-ring{transform-origin:100px 100px}
.wheel__readout{display:flex;gap:1.4rem;font-family:var(--f-mono);font-size:.9rem;color:var(--vellum-dim);letter-spacing:.06em}
.wheel__readout b{color:var(--brass-bright)}

.wheel__panel{display:flex;flex-direction:column}
.wheel__label{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--brass);margin:0 0 .5rem}
.wheel__in{
  background:var(--ink);border:1px solid var(--line);color:var(--vellum);
  font-family:var(--f-mono);font-size:1rem;padding:.75rem .9rem;border-radius:8px;letter-spacing:.12em;
  text-transform:uppercase;margin-bottom:1.2rem;
}
.wheel__out{
  display:block;background:rgba(16,11,6,.55);border:1px solid var(--line);border-left:3px solid var(--oxblood-bright);
  color:var(--brass-bright);font-family:var(--f-mono);font-size:1.05rem;font-weight:700;letter-spacing:.2em;
  padding:.8rem .9rem;border-radius:8px;min-height:2.9rem;word-break:break-all;margin-bottom:1.4rem;
}
.tape{margin-bottom:1.4rem}
.tape__label{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--vellum-faint);display:block;margin-bottom:.5rem}
.tape__scroll{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:
  repeating-linear-gradient(90deg,transparent 0 22px,rgba(200,162,74,.05) 22px 23px), #0d0904;}
.tape__svg{display:block;height:96px}
.wheel__controls{display:flex;flex-wrap:wrap;gap:.6rem}
.wheel__hint{font-size:.74rem;color:var(--vellum-faint);margin:.9rem 0 0;letter-spacing:.03em}

/* ---------- VISIT ---------- */
.visit__grid{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(1.6rem,5vw,3.5rem);align-items:center}
.visit__intro p{color:var(--vellum-dim);max-width:44ch;margin:1rem 0 1.8rem}
.ticket{
  background:linear-gradient(135deg,#2a2012,#1c150c);border:1px solid var(--line);border-radius:var(--r);
  display:flex;overflow:hidden;box-shadow:0 24px 50px -24px rgba(0,0,0,.7);
}
.ticket__stub{
  flex:none;width:66px;background:var(--oxblood);color:var(--vellum);position:relative;isolation:isolate;
  display:flex;align-items:center;justify-content:center;border-right:2px dashed rgba(236,224,198,.5);
}
.ticket__no{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--f-mono);font-size:.8rem;letter-spacing:.28em;font-weight:700}
.ticket__punch{position:absolute;top:8px;left:50%;transform:translateX(-50%);width:10px;height:10px;border-radius:50%;background:var(--ink);box-shadow:0 84px 0 var(--ink)}
.ticket__body{padding:clamp(1.2rem,3vw,1.8rem);display:grid;gap:1rem;flex:1}
.ticket__body div{border-bottom:1px solid var(--line-soft);padding-bottom:.85rem}
.ticket__body div:last-child{border-bottom:0;padding-bottom:0}
.ticket__body dt{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--brass);margin-bottom:.3rem}
.ticket__body dd{margin:0;color:var(--vellum);font-size:.9rem;line-height:1.5}

/* ---------- CONTACT ---------- */
.cform{max-width:760px;margin:0 auto;padding:0 var(--pad)}
.cform__row{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
.field{display:flex;flex-direction:column;gap:.45rem;margin-bottom:1.2rem}
.field span{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--brass)}
.field input,.field textarea{
  background:var(--ink);border:1px solid var(--line);color:var(--vellum);
  font-family:var(--f-mono);font-size:.94rem;padding:.75rem .85rem;border-radius:8px;resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:var(--vellum-faint)}
.field input:focus,.field textarea:focus{border-color:var(--brass);outline:none}
.cform__foot{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;margin-top:.4rem}
.cform__note{font-size:.78rem;color:var(--vellum-faint);margin:0;letter-spacing:.03em}
.cform__note[data-state="ok"]{color:var(--brass-bright)}

/* ---------- FOOTER ---------- */
.site-foot{position:relative;z-index:2;border-top:1px solid var(--line);padding:clamp(2.4rem,5vw,3.5rem) var(--pad) 2.4rem;margin-top:2rem}
.site-foot__top{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1.2rem;align-items:center}
.site-foot__nav{display:flex;flex-wrap:wrap;gap:1.2rem;font-size:.8rem}
.site-foot__nav a{color:var(--vellum-dim);letter-spacing:.04em}
.site-foot__nav a:hover{color:var(--brass-bright)}
.site-foot__fine{max-width:var(--maxw);margin:2rem auto .6rem;font-family:var(--f-disp);font-style:italic;font-size:clamp(1.1rem,1rem + 1vw,1.5rem);color:var(--brass);letter-spacing:.01em}
.site-foot__legal{max-width:var(--maxw);margin:0 auto;font-size:.74rem;color:var(--vellum-faint);letter-spacing:.02em}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .exhibit{grid-template-columns:1fr;gap:1.4rem}
  .exhibit--rev .exhibit__plate{order:0}
  .plate-art{max-width:260px}
  .wheel__stage{grid-template-columns:1fr;gap:2.4rem}
  .visit__grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .cform__row{grid-template-columns:1fr;gap:0}
  .hero__title{gap:.05em .18em}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  .hero__scroll span::after{animation:none}
  .hero__drift{display:none}
  *{scroll-behavior:auto!important}
}