/* ============================================================
   QRONOS — launch site stylesheet (EN) v0.1.0
   Design system: the instrument manual.
   Paper ground #F6F0E0 · ink #524F48 · seal red #D81C0C.
   Sans-forward type (Inter Tight; wordmark is a raster asset).
   ============================================================ */

:root{
  /* brand tokens — single accent, one palette, warm neutrals only */
  --paper:#F6F0E0;        /* ground — a warmer cream */
  --band:#EFE8D6;         /* deeper cream band */
  --ink:#524F48;          /* wordmark + headings + body */
  --ink-deep:#141414;     /* charcoal hero + band ground */
  --ink-2:#5E5951;        /* secondary body */
  --muted:#65605A;        /* labels, captions (AA on paper) */
  --line:rgba(82,79,72,.16);       /* hairlines */
  --line-strong:rgba(82,79,72,.30);
  --red:#D81C0C;          /* the period. the only accent. */
  --red-deep:#A81204;
  --on-red:#FDF8EE;
  --font-sans:'Inter Tight',system-ui,-apple-system,sans-serif;
  --font-display:'Instrument Serif',Georgia,'Times New Roman',serif;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);color:var(--ink);
  font-family:var(--font-sans);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
  zoom:1.1; /* default view 110% */
}
::selection{background:var(--red);color:var(--on-red)}
:focus-visible{outline:2px solid var(--red-deep);outline-offset:2px}
a{color:inherit}
img{display:block;max-width:100%}

.wrap{max-width:1200px;margin:0 auto;padding:0 48px}

/* ---------- labels & buttons ---------- */
.label{
  font-weight:500;font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--muted);
}
.btn{
  display:inline-block;font-family:var(--font-sans);font-weight:500;
  font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  padding:18px 30px;text-decoration:none;line-height:1;
  transition:background .25s,color .25s,border-color .25s;cursor:pointer;
}
.btn.solid{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.btn.solid:hover{background:var(--red);border-color:var(--red)}
.btn.ghost{color:var(--ink);border:1px solid var(--line-strong)}
.btn.ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn:active{transform:translateY(1px)}
.hero .btn.solid{background:var(--red);border-color:var(--red);color:var(--on-red)}
.hero .btn.solid:hover{background:var(--paper);border-color:var(--paper);color:var(--ink)}
.hero .btn.ghost{color:var(--paper);border-color:rgba(248,244,234,.35)}
.hero .btn.ghost:hover{background:var(--paper);border-color:var(--paper);color:var(--ink)}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,240,224,.9);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{height:30px;width:auto}
.clockpill{
  display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);padding:7px 14px;color:var(--muted);
}
.clockpill .dot{width:6px;height:6px;border-radius:50%;background:var(--red);animation:blink 1.8s infinite}
.clockpill b{color:var(--ink);font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:.06em}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.2}}

/* ---------- hero ---------- */
.hero{background:var(--ink-deep);color:var(--paper);border-bottom:1px solid rgba(248,244,234,.14);position:relative;overflow:hidden}
.hero::before{ /* faint red bloom, instrument side only */
  content:'';position:absolute;right:-10%;top:-20%;width:60%;height:120%;
  background:radial-gradient(60% 60% at 60% 50%,rgba(216,28,12,.05),transparent 70%);
  pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;
  max-width:1200px;margin:0 auto;padding:64px 48px 88px;gap:56px;
  align-items:center;min-height:calc(100dvh - 64px);
}
.hero-left .eyebrow{margin-bottom:26px;display:inline-flex;gap:12px;align-items:center;color:rgba(248,244,234,.68)}
.hero-left .eyebrow::before{content:'';width:8px;height:8px;background:var(--red);flex:none}
h1{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(48px,6vw,84px);line-height:1.06;letter-spacing:-.01em;
}
.hero-sub{margin-top:28px;max-width:38ch;color:rgba(248,244,234,.82);font-size:18px;line-height:1.6}
.ctas{display:flex;gap:14px;margin-top:40px;flex-wrap:wrap}

/* instrument column */
.hero-right{display:flex;align-items:center;justify-content:center;position:relative;padding:24px 0 8px}
/* very faint ruling — the wheel must stay the hero */
.hero-right::before{
  content:'';position:absolute;inset:-24px -24px 0;
  background:
    linear-gradient(rgba(248,244,234,.045) 1px,transparent 1px) 0 0/100% 24px,
    linear-gradient(90deg,rgba(248,244,234,.045) 1px,transparent 1px) 0 0/24px 100%;
  pointer-events:none;
}
.instrument{position:relative;width:min(480px,100%)}
.instrument svg{width:100%;height:auto}
.instrument text{font-family:var(--font-sans);font-weight:500;font-variant-numeric:tabular-nums;text-transform:uppercase}
/* ring + scanner rotate via SVG attribute transforms in launch.js —
   CSS transforms on SVG children misrender in Safari at non-100% zoom. */
.pal{fill:rgba(216,28,12,0);transition:fill 1.2s ease-in-out}
.pal.on{fill:rgba(216,28,12,.10)}
.instrument .cap{position:absolute;left:0;right:0;bottom:-34px;text-align:center;color:rgba(248,244,234,.6)}



/* ---------- sections ---------- */
section.wrap{padding-top:96px;padding-bottom:24px}
#about,#how,#faq{scroll-margin-top:80px}
.sec-head{display:flex;align-items:baseline;gap:18px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.sec-head .n{color:var(--red);font-weight:600}
h2{
  font-family:var(--font-display);font-weight:400;
  font-size:clamp(30px,3.2vw,48px);line-height:1.12;letter-spacing:-.01em;
}

/* about band */
.band{display:grid;grid-template-columns:1fr 1fr;gap:64px;padding:56px 0 88px}
.band h2{max-width:14ch}
.band .body p{color:var(--ink-2);max-width:56ch;margin-bottom:20px}
.spec-list{margin-top:40px;border-top:1px solid var(--line)}
.spec-list div{display:flex;justify-content:space-between;gap:24px;padding:15px 0;border-bottom:1px solid var(--line)}
.spec-list .k{color:var(--muted)}
.spec-list .v{color:var(--ink);font-weight:500;text-align:right;text-transform:none;letter-spacing:.04em}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.step{padding:40px 36px 48px 0;border-right:1px solid var(--line)}
.step:last-child{border-right:none}
.step + .step{padding-left:36px}
.step .n{width:9px;height:9px;background:var(--red);display:block;margin-bottom:18px}
.step h3{font-family:var(--font-display);font-weight:400;font-size:24px;line-height:1.15;letter-spacing:-.01em;margin-bottom:12px}
.step p{color:var(--ink-2);font-size:15.5px;line-height:1.6;max-width:30ch}

/* charcoal band — section 02 breaks the paper ground with deep ink */
.red-band{background:var(--ink-deep);color:var(--paper);padding:96px 0}
.red-band .sec-head{border-color:rgba(248,244,234,.18)}
.red-band .sec-head span{color:rgba(248,244,234,.55)}
.red-band .sec-head .n{color:var(--red)}
.red-band .steps{border-top-color:rgba(248,244,234,.18)}
.red-band .step{border-right-color:rgba(248,244,234,.14)}
.red-band .step .n{background:var(--red)}
.red-band .step h3{color:var(--paper)}
.red-band .step p{color:rgba(248,244,234,.72)}
.red-band .step + .step{border-bottom-color:rgba(248,244,234,.14)}

/* ---------- FAQ ---------- */
.faq{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;padding:56px 0 110px;align-items:start}
.faq h2{max-width:10ch}
.faq-intro{margin-top:24px;color:var(--ink-2);max-width:28ch;line-height:1.65}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{display:flex;align-items:baseline;gap:20px;padding:24px 0;cursor:pointer;list-style:none}
.faq-q::-webkit-details-marker{display:none}
.faq-q .plus{font-weight:500;font-size:15px;color:var(--red);transition:transform .3s;flex:none}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-q h3{font-family:var(--font-display);font-weight:400;font-size:21px;letter-spacing:-.01em;line-height:1.25}
.faq-a{padding:0 0 30px 35px;max-width:62ch}
.faq-a p{color:var(--ink-2);font-size:16px;line-height:1.7;margin-bottom:14px}
.faq-a p:last-child{margin-bottom:0}
.faq-a a{color:var(--red-deep);text-decoration:underline;text-underline-offset:3px}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line)}
.foot{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;flex-wrap:wrap;padding-block:56px 40px}
.foot .logo{height:38px}
.foot-links{display:flex;gap:26px;margin-top:18px;flex-wrap:wrap}
.foot-links a{color:var(--muted);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s,color .2s}
.foot-links a:hover{color:var(--ink);border-bottom-color:var(--red)}
.foot-legal{color:var(--muted);font-size:13px;max-width:52ch;line-height:1.7;text-align:right}
.foot-legal b{color:var(--ink-2);font-weight:500}

/* ---------- legal / doc pages ---------- */
.doc{max-width:780px;padding:72px 48px 120px}
.doc-head{padding-bottom:28px;border-bottom:1px solid var(--line)}
.doc-head h1{font-family:var(--font-display);font-weight:400;font-size:clamp(34px,4.2vw,54px);margin-top:18px;letter-spacing:-.01em;line-height:1.08}
.doc-head .meta{margin-top:16px}
.doc-head .meta a{color:var(--red-deep);text-decoration:underline;text-underline-offset:3px}
.doc h2{
  font-family:var(--font-display);font-weight:400;font-size:23px;
  letter-spacing:-.01em;line-height:1.2;margin-top:52px;padding-top:20px;
  border-top:1px solid var(--line);
}
.doc h2 .no{color:var(--red);margin-right:12px;font-weight:600}
.doc p,.doc li{color:var(--ink-2);font-size:16px;line-height:1.75}
.doc p{margin-top:18px}
.doc ul{margin:14px 0 0 0;padding-left:22px;display:flex;flex-direction:column;gap:10px}
.doc li::marker{color:var(--red)}
.doc .note{
  margin-top:26px;border:1px solid var(--line-strong);padding:18px 22px;
  color:var(--ink);font-size:15px;line-height:1.7;background:var(--band);
}
.doc .note b{font-weight:600}
.doc a{color:var(--red-deep);text-decoration:underline;text-underline-offset:3px}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
/* slide in from the left — for split columns (draft card language) */
.from-left{opacity:0;transform:translateX(-28px);transition:opacity .8s ease,transform .8s var(--ease)}
.from-left.in{opacity:1;transform:none}
/* fade only — quiet, for dense content like spec lists */
.fade-in{opacity:0;transition:opacity 1s ease}
.fade-in.in{opacity:1}

/* ---------- responsive: tablet (≤1024) ---------- */
@media (max-width:1024px){
  .wrap{padding:0 24px}
  .hero-inner{grid-template-columns:1fr;gap:56px;padding:48px 24px 72px;min-height:0}
  .hero-left{text-align:center;display:flex;flex-direction:column;align-items:center}
  .hero-left .eyebrow{justify-content:center}
  .hero-sub{margin-left:auto;margin-right:auto}
  .ctas{justify-content:center}
  .hero-right{padding:0}
  .hero-right::before{inset:-8px -8px 0}
  .instrument{width:min(440px,88%)}
  .instrument .cap{position:static;margin-top:18px}
  .band,.faq{grid-template-columns:1fr;gap:40px}
  .steps{grid-template-columns:1fr}
  .step{border-right:none;padding:26px 0}
  .step + .step{border-bottom:1px solid var(--line);padding-left:0}
  section.wrap{padding-top:64px}
  .red-band{padding:64px 0}
  .clockpill{display:none}
}
@media (max-width:1024px){
  .doc{padding:48px 24px 96px}
  .faq-a{padding-left:0}
  .foot-links{gap:18px}
}

/* ---------- responsive: mobile (≤640) ---------- */
@media (max-width:640px){
  .wrap{padding:0 20px}
  .hero-inner{padding:40px 20px 64px;gap:48px}
  .eyebrow{font-size:10px;letter-spacing:.12em}
  h1{font-size:clamp(40px,13vw,52px)}
  .hero-sub{font-size:16.5px}
  .btn{padding:16px 26px}
  .ctas{flex-direction:column;align-items:stretch;width:100%}
  .btn{width:100%;text-align:center}
  .instrument{width:min(360px,100%)}
  .sec-head{flex-direction:column;align-items:flex-start;gap:6px;padding-bottom:16px}
  section.wrap{padding-top:56px}
  .band{padding:40px 0 64px;gap:28px}
  .spec-list div{gap:14px}
  .red-band{padding:56px 0}
  .step{padding:24px 0}
  .faq{gap:32px;padding:40px 0 80px}
  .faq-q{gap:14px;padding:20px 0}
  .faq-q h3{font-size:19px}
  .foot{padding-block:48px 32px;flex-direction:column;align-items:flex-start}
  .foot-legal{text-align:left}
  .doc{padding:40px 20px 80px}
  .doc-head h1{font-size:clamp(28px,9vw,40px)}
  .doc h2{font-size:21px}
  .doc p,.doc li{font-size:15.5px}
  .foot .logo{height:32px}
}

/* reduced motion: static instrument, no transitions */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
  .reveal,.from-left,.fade-in{opacity:1;transform:none}
}