/* ═══════════════════════════════════════════════════════════
   HALDEN — Independent Horology
   Metaphor: chronometer rate certificate × technical caliper drawing
   Tokens → base → motion → components → sections → responsive
   ═══════════════════════════════════════════════════════════ */

:root{
  /* ground */
  --ink:#0B0C0E;
  --ink-2:#121417;
  --ink-3:#1A1D21;
  --hair:#262A30;
  --hair-2:#343A42;

  /* paper (certificate section) */
  --paper:#E7E2D8;
  --paper-2:#D8D2C4;
  --paper-ink:#1A1C1F;

  /* materials */
  --brass:#C8A45C;
  --brass-lo:#8D6F34;
  --brass-hi:#E6CF94;
  --blued:#4A6FA5;

  /* type */
  --fg:#E9E3D6;
  --fg-dim:#9AA0A8;
  --fg-faint:#6A7078;

  --display:"Instrument Serif",Georgia,serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;

  /* motion */
  --e:cubic-bezier(.22,1,.36,1);
  --e-out:cubic-bezier(.25,.1,.25,1);

  --maxw:1280px;
  --pad:clamp(20px,4vw,64px);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--fg);
  font-family:var(--mono);font-weight:300;font-size:15px;line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}

::selection{background:var(--brass);color:var(--ink)}

/* focus always visible (accessibility) */
a:focus-visible,button:focus-visible,input:focus-visible,
select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brass);outline-offset:3px;
}

/* ══ TYPE ══ */
.display{
  font-family:var(--display);font-weight:400;
  font-size:clamp(3rem,7.4vw,6.6rem);line-height:.94;letter-spacing:-.02em;
  margin:.18em 0 .4em;color:var(--fg);
}
.display.sm{font-size:clamp(2.1rem,4.6vw,3.9rem)}
.display em{font-style:italic;color:var(--brass)}
.display.dark{color:var(--paper-ink)}
.display.dark em{color:var(--brass-lo)}

.idx{
  font-family:var(--mono);font-size:11px;font-weight:400;
  letter-spacing:.22em;text-transform:uppercase;color:var(--fg-faint);
  margin:0;
}
.idx.dark{color:#7A736A}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase}

.lede{
  max-width:46ch;color:var(--fg-dim);font-size:15px;line-height:1.75;margin:0 0 2.2rem;
}
.sec-lede{max-width:52ch;color:var(--fg-dim);line-height:1.75;margin:.6rem 0 0}

/* leader dots — certificate furniture */
.leader{
  flex:1;height:1px;margin:0 10px;align-self:flex-end;margin-bottom:5px;
  background-image:radial-gradient(circle,var(--hair-2) 1px,transparent 1px);
  background-size:5px 1px;background-repeat:repeat-x;
}

/* ══ GRAIN + CURSOR ══ */
.grain{
  position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.038;
  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='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

.crosshair{position:fixed;top:0;left:0;z-index:9999;pointer-events:none;opacity:0;
  transition:opacity .3s var(--e-out);mix-blend-mode:difference}
.crosshair.on{opacity:1}
.crosshair-v,.crosshair-h{position:absolute;background:var(--brass);opacity:.5}
.crosshair-v{width:1px;height:26px;left:0;top:-13px}
.crosshair-h{height:1px;width:26px;top:0;left:-13px}
.crosshair-read{
  position:absolute;left:16px;top:8px;font-family:var(--mono);font-size:9px;
  letter-spacing:.16em;color:var(--brass);white-space:nowrap;
}
.crosshair.big .crosshair-v{height:44px;top:-22px}
.crosshair.big .crosshair-h{width:44px;left:-22px}

/* ══ THE ONE REVEAL: print-in (receipt/certificate printing) ══ */
[data-rise]{
  clip-path:inset(0 0 100% 0);
  transform:translate3d(0,14px,0);
  opacity:.001;
  transition:
    clip-path .78s var(--e) var(--d,0s),
    transform .78s var(--e) var(--d,0s),
    opacity .5s linear var(--d,0s);
}
[data-rise].in{clip-path:inset(0 0 0 0);transform:none;opacity:1}

/* ══ BUTTONS: stamped, not pills ══ */
.stamp-btn{
  position:relative;display:inline-flex;align-items:center;gap:12px;
  padding:15px 26px;background:var(--brass);color:var(--ink);
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;
  border:none;cursor:pointer;
  /* notched corners — a punched metal tag, not a rounded pill */
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
  box-shadow:4px 4px 0 var(--brass-lo);
  transition:transform .18s var(--e-out),box-shadow .18s var(--e-out),background .18s var(--e-out);
}
.stamp-btn:hover{
  transform:translate3d(2px,2px,0);
  box-shadow:1px 1px 0 var(--brass-lo);
  background:var(--brass-hi);
}
.stamp-btn:active{transform:translate3d(4px,4px,0);box-shadow:0 0 0 var(--brass-lo)}
/* asymmetric: out is slower than in */
.stamp-btn{transition-duration:.32s}
.stamp-btn:hover{transition-duration:.18s}
.stamp-btn.wide{width:100%;justify-content:center;margin-top:8px}

.ghost-btn{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--fg-dim);padding:15px 4px;position:relative;
  transition:color .32s var(--e-out),letter-spacing .32s var(--e-out);
}
.ghost-btn::after{
  content:"";position:absolute;left:4px;right:4px;bottom:10px;height:1px;
  background:var(--brass);transform:scaleX(0);transform-origin:left;
  transition:transform .32s var(--e);
}
.ghost-btn:hover{color:var(--brass);letter-spacing:.22em;transition-duration:.18s}
.ghost-btn:hover::after{transform:scaleX(1);transition-duration:.18s}

/* ══ RAIL (nav = machined metal strip) ══ */
.rail{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:0 var(--pad);height:58px;
  background:linear-gradient(180deg,rgba(11,12,14,.94),rgba(11,12,14,.72));
  border-bottom:1px solid var(--hair);
  backdrop-filter:blur(6px);
}
.rail-mark{display:flex;align-items:center;gap:9px;color:var(--fg);
  font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.26em}
.rail-mark svg{color:var(--brass)}
.rail-nav{display:flex;gap:26px}
.rail-nav a{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--fg-faint);padding:4px 0;position:relative;
  transition:color .32s var(--e-out);
}
.rail-nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:var(--brass);transform:scaleX(0);transform-origin:left;transition:transform .32s var(--e)}
.rail-nav a:hover{color:var(--fg);transition-duration:.18s}
.rail-nav a:hover::after{transform:scaleX(1);transition-duration:.18s}

.rail-time{display:flex;align-items:baseline;gap:10px}
.rail-time-label{font-family:var(--mono);font-size:9px;letter-spacing:.2em;color:var(--fg-faint)}
.rail-time-val{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--brass);
  font-variant-numeric:tabular-nums}

/* ══ HERO ══ */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;
  justify-content:center;padding:110px var(--pad) 0;overflow:hidden}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(var(--hair) 1px,transparent 1px),
    linear-gradient(90deg,var(--hair) 1px,transparent 1px);
  background-size:78px 78px;
  mask-image:radial-gradient(ellipse 78% 62% at 50% 42%,#000 20%,transparent 78%);
}
.hero-inner{
  position:relative;width:100%;max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,72px);align-items:center;
}
.hero-cta{display:flex;align-items:center;gap:22px;flex-wrap:wrap}

/* dial */
.dial-wrap{margin:0;position:relative}
.dial{width:100%;max-width:440px;margin:0 auto;filter:drop-shadow(0 30px 60px rgba(0,0,0,.55))}
.dial-brand{font-family:var(--display);font-size:19px;fill:var(--fg);letter-spacing:.16em}
.dial-sub{font-family:var(--mono);font-size:7.4px;fill:var(--fg-faint);letter-spacing:.24em}
.subdial-label{font-family:var(--mono);font-size:6.6px;fill:var(--fg-faint);letter-spacing:.18em}
.dial-num{font-family:var(--display);font-size:20px;fill:var(--fg);opacity:.86}
.dial-cap{display:flex;align-items:flex-end;max-width:440px;margin:16px auto 0;color:var(--fg-faint)}

.hero-foot{
  position:relative;max-width:var(--maxw);margin:0 auto;width:100%;
  display:flex;align-items:center;gap:16px;color:var(--fg-faint);
  padding:38px 0 30px;
}
.scroll-line{flex:1;height:1px;background:linear-gradient(90deg,var(--hair-2),transparent);
  position:relative;overflow:hidden}
.scroll-line::after{content:"";position:absolute;top:0;left:0;width:60px;height:1px;
  background:var(--brass);animation:sweep 3.4s var(--e) infinite}
@keyframes sweep{0%{transform:translateX(-60px)}100%{transform:translateX(46vw)}}

/* ══ TICKER ══ */
.ticker{
  border-top:1px solid var(--hair);border-bottom:1px solid var(--hair);
  background:var(--ink-2);overflow:hidden;padding:13px 0;
}
.ticker-row{display:flex;gap:0;white-space:nowrap;will-change:transform;
  animation:tick 46s linear infinite}
@keyframes tick{from{transform:translate3d(0,0,0)}to{transform:translate3d(-33.333%,0,0)}}
.ticker-item{
  display:inline-flex;align-items:center;gap:12px;padding:0 30px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--fg-faint);
}
.ticker-item b{color:var(--brass);font-weight:400}
.ticker-item::after{content:"✳";color:var(--hair-2);margin-left:30px}

/* ══ PIN — signature mechanic ══ */
.pin{height:460vh;position:relative}
.pin-vp{position:sticky;top:0;height:100svh;overflow:hidden;
  display:grid;grid-template-columns:1fr;place-items:center;padding:70px var(--pad) 0}
.pin-head{position:absolute;top:82px;left:var(--pad);z-index:3;max-width:34ch}
.pin-head .display{margin:.2em 0 0}
.explode{width:min(700px,88vw);height:auto;max-height:84svh}
.exp-label{font-family:var(--mono);font-size:8.4px;fill:var(--fg-faint);letter-spacing:.18em}
.exp-num{font-family:var(--mono);font-size:8.4px;fill:var(--brass);letter-spacing:.16em}

.pin-note{
  position:absolute;right:var(--pad);bottom:78px;z-index:3;
  width:min(320px,80vw);padding:22px 24px;
  background:linear-gradient(180deg,rgba(18,20,23,.96),rgba(11,12,14,.96));
  border:1px solid var(--hair);
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
}
.pin-note-idx{color:var(--brass);margin:0 0 10px}
.pin-note-title{font-family:var(--display);font-size:1.9rem;font-weight:400;margin:0 0 8px;line-height:1}
.pin-note-body{margin:0 0 16px;color:var(--fg-dim);font-size:13px;line-height:1.65}
.pin-note-spec{display:grid;grid-template-columns:auto 1fr;gap:4px 16px;
  border-top:1px solid var(--hair);padding-top:12px}
.pin-note-spec span{font-family:var(--mono);font-size:9px;letter-spacing:.16em;color:var(--fg-faint)}
.pin-note-spec b{font-family:var(--mono);font-size:11px;font-weight:400;color:var(--fg);text-align:right}

.pin-progress{position:absolute;left:var(--pad);bottom:80px;width:150px;height:1px;background:var(--hair-2)}
.pin-progress-fill{height:100%;width:0;background:var(--brass);transform-origin:left}

/* ══ CERTIFICATE (paper) ══ */
.cert{background:var(--ink);padding:clamp(70px,10vw,140px) var(--pad)}
.cert-sheet{
  max-width:1080px;margin:0 auto;background:var(--paper);color:var(--paper-ink);
  padding:clamp(30px,5vw,66px);position:relative;
  box-shadow:0 40px 90px rgba(0,0,0,.6);
  /* perforated top and bottom edge */
  --perf:radial-gradient(circle at 6px 0,transparent 5px,var(--paper) 5.5px);
}
.cert-sheet::before,.cert-sheet::after{
  content:"";position:absolute;left:0;right:0;height:10px;
  background-image:radial-gradient(circle,var(--ink) 4.6px,transparent 5px);
  background-size:16px 10px;background-position:center;
}
.cert-sheet::before{top:-1px}
.cert-sheet::after{bottom:-1px}

.cert-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}
.cert-stamp{
  flex:none;width:104px;height:104px;border:2px solid var(--brass-lo);border-radius:50%;
  display:grid;place-items:center;transform:rotate(-9deg);opacity:.62;
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--brass-lo);
  text-align:center;line-height:1.35;
}
.cert-intro{max-width:56ch;color:#4A463F;line-height:1.75;margin:6px 0 34px;font-size:14px}

.cert-table{width:100%;border-collapse:collapse;margin-bottom:34px}
.cert-table th{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;
  color:#7A736A;text-align:left;font-weight:400;padding:0 10px 10px 0;
  border-bottom:1px solid rgba(26,28,31,.28);
}
.cert-table th:nth-child(n+2){text-align:right}
.cert-table td{padding:13px 10px 13px 0;border-bottom:1px solid rgba(26,28,31,.11);
  font-family:var(--mono);font-size:12.5px;font-variant-numeric:tabular-nums}
.cert-table td:nth-child(n+2){text-align:right}
.cert-table tbody tr{transition:background .32s var(--e-out)}
.cert-table tbody tr:hover{background:rgba(200,164,92,.16);transition-duration:.18s}
.cert-pos{font-family:var(--mono);font-size:12px;letter-spacing:.04em}
.cert-ok{color:#3D6B45}
.cert-bar{width:64px;height:4px;background:rgba(26,28,31,.12);display:inline-block;position:relative;vertical-align:middle}
.cert-bar i{position:absolute;top:0;bottom:0;left:50%;background:var(--brass-lo);transform-origin:left}

.cert-foot{display:flex;flex-wrap:wrap;gap:34px;align-items:flex-end;
  border-top:2px solid var(--paper-ink);padding-top:20px}
.cert-foot-item{display:flex;flex-direction:column;gap:3px}
.cert-foot-item .mono{color:#7A736A}
.cert-foot-item b{font-family:var(--display);font-size:1.9rem;font-weight:400;line-height:1}
.cert-sign{margin-left:auto;display:flex;flex-direction:column;align-items:flex-end;gap:2px}
.cert-sign .mono{color:#7A736A}
.sig{width:160px;height:42px}
.sig-path{stroke-dasharray:420;stroke-dashoffset:420;transition:stroke-dashoffset 1.5s var(--e) .2s}
.cert-sheet.in .sig-path{stroke-dashoffset:0}

/* ══ SECTION HEAD ══ */
.sec-head{max-width:var(--maxw);margin:0 auto clamp(38px,6vw,70px)}
.sec-head .display{margin:.2em 0 0}

/* ══ REFERENCES ══ */
.refs{padding:clamp(70px,10vw,140px) var(--pad);border-top:1px solid var(--hair)}
.ref-grid{max-width:var(--maxw);margin:0 auto;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1px;background:var(--hair)}
.ref{
  background:var(--ink);padding:30px 26px 26px;position:relative;
  transition:background .34s var(--e-out);
}
.ref:hover{background:var(--ink-2);transition-duration:.18s}
.ref-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:20px}
.ref-num{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--brass)}
.ref-lim{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--fg-faint)}

/* watch face mini — drawn, hovering catches light */
.ref-face{width:100%;aspect-ratio:1;margin:0 auto 22px;position:relative;max-width:180px}
.ref-face svg{width:100%;height:100%;overflow:visible}
.ref-face::after{
  content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none;
  background:linear-gradient(115deg,transparent 38%,rgba(255,255,255,.16) 47%,transparent 56%);
  transform:translateX(-120%);
}
.ref:hover .ref-face::after{transform:translateX(120%);transition:transform .62s var(--e)}

.ref-name{font-family:var(--display);font-size:1.65rem;font-weight:400;margin:0 0 3px;line-height:1.05}
.ref-tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--fg-faint);
  text-transform:uppercase;margin:0 0 18px}
.ref-specs{border-top:1px solid var(--hair);padding-top:14px;display:flex;flex-direction:column;gap:7px}
.ref-spec{display:flex;align-items:flex-end;font-size:11px}
.ref-spec span{font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;color:var(--fg-faint);
  text-transform:uppercase}
.ref-spec b{font-family:var(--mono);font-size:11px;font-weight:400;color:var(--fg)}
.ref-price{margin-top:16px;font-family:var(--display);font-size:1.5rem;color:var(--brass)}

/* ══ ATELIER STEPS ══ */
.atelier{padding:clamp(70px,10vw,140px) var(--pad);border-top:1px solid var(--hair);background:var(--ink-2)}
.steps{max-width:var(--maxw);margin:0 auto;padding:0;list-style:none;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:0}
.step{padding:26px 26px 26px 0;border-top:1px solid var(--hair);position:relative}
.step-n{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--brass);
  display:block;margin-bottom:14px}
.step-t{font-family:var(--display);font-size:1.42rem;font-weight:400;margin:0 0 8px;line-height:1.1}
.step-b{margin:0;color:var(--fg-dim);font-size:12.5px;line-height:1.7;max-width:34ch}
.step-time{position:absolute;top:26px;right:20px;font-family:var(--mono);font-size:9px;
  letter-spacing:.14em;color:var(--fg-faint)}

/* ══ ENQUIRE ══ */
.enquire{padding:clamp(70px,10vw,140px) var(--pad);border-top:1px solid var(--hair)}
.enquire-inner{max-width:var(--maxw);margin:0 auto;display:grid;
  grid-template-columns:1fr .82fr;gap:clamp(34px,6vw,86px);align-items:start}
.enquire-live{display:flex;align-items:baseline;gap:10px;margin-top:30px;
  border-top:1px solid var(--hair);padding-top:18px}
.enquire-live .mono{color:var(--fg-faint)}
.enquire-live b{font-family:var(--display);font-size:2.4rem;font-weight:400;color:var(--brass);line-height:1}

.form{display:flex;flex-direction:column;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--fg-faint)}
.field .opt{color:var(--hair-2);letter-spacing:.1em}
.field input,.field select,.field textarea{
  background:var(--ink-2);border:1px solid var(--hair);color:var(--fg);
  padding:13px 14px;font-family:var(--mono);font-size:13px;font-weight:300;
  transition:border-color .32s var(--e-out),background .32s var(--e-out);
  border-radius:0;
}
.field textarea{resize:vertical;min-height:82px}
.field input::placeholder,.field textarea::placeholder{color:var(--hair-2)}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brass);background:var(--ink-3);outline:none;transition-duration:.18s}
.field input.err,.field textarea.err{border-color:#8C4A42}
.form-msg{font-family:var(--mono);font-size:11px;letter-spacing:.1em;margin:6px 0 0;min-height:1.2em}
.form-msg.ok{color:var(--brass)}
.form-msg.bad{color:#C97B72}

/* ══ COLOPHON ══ */
.colophon{border-top:1px solid var(--hair);padding:26px var(--pad) 34px;background:var(--ink-2)}
.colo-row{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;
  gap:20px;flex-wrap:wrap;color:var(--fg-faint)}
.colo-row .mono:last-child{color:var(--brass);font-variant-numeric:tabular-nums}
.colo-note{max-width:var(--maxw);margin:14px auto 0;font-family:var(--mono);font-size:10px;
  letter-spacing:.08em;color:var(--hair-2)}

/* ══ RESPONSIVE ══ */
@media (max-width:1020px){
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .dial-wrap{order:-1;max-width:340px;margin:0 auto}
  .enquire-inner{grid-template-columns:1fr}
  .pin-head{position:static;margin-bottom:14px;max-width:none}
  .pin-vp{align-content:start;gap:10px;padding-top:74px}
  .pin-note{position:static;width:100%;max-width:520px;margin-top:14px}
  .pin-progress{bottom:26px}
  .explode{max-height:46svh}
}
@media (max-width:720px){
  .rail-nav{display:none}
  .cert-head{flex-direction:column}
  .cert-stamp{order:-1}
  .cert-table th:nth-child(3),.cert-table td:nth-child(3),
  .cert-table th:nth-child(5),.cert-table td:nth-child(5){display:none}
  .hero-cta{gap:12px}
  .stamp-btn{width:100%;justify-content:center}
  .step{padding-right:0}
}
@media (hover:none){
  .crosshair{display:none}
}

/* ══ REDUCED MOTION ══ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;scroll-behavior:auto!important;
  }
  [data-rise]{clip-path:none;transform:none;opacity:1}
  .sig-path{stroke-dashoffset:0}
  .pin{height:auto}
  .pin-vp{position:static;height:auto;padding-bottom:60px}
  .ticker-row{animation:none}
}