/* ============================================================
   HALCYON RING — dusk design system
   Tokens first. Motion is timed to breath: long, soft, in-out.
   ============================================================ */
:root{
  --bg:#141026;            /* indigo dusk base */
  --panel:rgba(24,19,44,.55);
  --panel-line:rgba(239,233,244,.12);
  --ink:#efe9f4;
  --dim:#b4a9c4;
  --faint:#6f6683;
  --rose:#e5a9b0;
  --indigo:#6d6ae0;
  --indigo-soft:#8f8cec;
  --gold:#e8c68a;
  --line:rgba(239,233,244,.10);
  --max:1200px;
  --ease:cubic-bezier(.5,.05,.15,1);      /* signature: long, soft in-out — nothing snaps */
  --breath:cubic-bezier(.37,0,.63,1);      /* sine-like, for breathing motion */
  --r:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  /* CSS dusk fallback — the canvas paints over this when JS runs */
  background:
    radial-gradient(90% 60% at 72% 12%, rgba(232,198,138,.12), transparent 60%),
    radial-gradient(85% 70% at 78% 62%, rgba(229,169,176,.18), transparent 65%),
    radial-gradient(110% 85% at 22% 32%, rgba(109,106,224,.28), transparent 70%),
    var(--bg);
  color:var(--ink);
  font-family:"DM Sans",system-ui,sans-serif;font-weight:400;line-height:1.6;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
em{font-style:italic}
::selection{background:var(--rose);color:#241019}
img,svg{max-width:100%}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* fixed ambience layers */
.dusk{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.stars{position:fixed;inset:0;width:100%;height:100%;z-index:1;pointer-events:none;opacity:.7;
  -webkit-mask-image:linear-gradient(180deg,#000 30%,transparent 85%);
  mask-image:linear-gradient(180deg,#000 30%,transparent 85%)}
.veil{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(130% 90% at 50% 0%,transparent 42%,rgba(9,6,20,.5) 100%)}
body>*:not(.dusk):not(.stars):not(.veil){position:relative;z-index:2}

/* ---------- type ---------- */
.eyebrow,.kicker,.panel-kicker{font-family:"DM Mono",monospace;font-size:.72rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold)}
/* soft dark halo keeps text legible wherever the dusk drifts bright */
.eyebrow,.kicker,.lede,.hero-sub,.s-lbl,.closer-meta,.quote cite,.hypno-legend li,.coach-meta{
  text-shadow:0 1px 3px rgba(15,11,30,.5),0 2px 20px rgba(15,11,30,.45)}
h1,h2,.closer-line,.quote p,.s-num,.s-suf{text-shadow:0 2px 30px rgba(15,11,30,.35)}
h1,h2{font-family:"Instrument Serif",Georgia,serif;font-weight:400;letter-spacing:.005em;line-height:1.04}
.hero-title{font-size:clamp(2.5rem,4.9vw,4.5rem);line-height:1.04;white-space:nowrap}
@media(max-width:520px){.hero-title{white-space:normal}}
.hero-title em{color:var(--rose);font-style:italic}
h2{font-size:clamp(2rem,4.6vw,3.3rem)}
h3{font-family:"DM Sans",sans-serif;font-weight:600;font-size:1.16rem;letter-spacing:-.01em}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;display:flex;justify-content:space-between;align-items:center;
  padding:16px clamp(18px,4vw,44px);
  background:linear-gradient(180deg,rgba(20,16,38,.8),rgba(20,16,38,0));backdrop-filter:blur(4px)}
.brand{display:flex;align-items:center;gap:11px;font-family:"Instrument Serif",serif;font-size:1.3rem;letter-spacing:.02em}
.brand-ring{width:16px;height:16px;border-radius:50%;flex:none;
  background:radial-gradient(closest-side,transparent 44%,#cfccdd 52%,#efe9f4 62%,#6f6683 78%,transparent 84%);
  box-shadow:0 0 12px rgba(229,169,176,.5)}
.nav-links{display:flex;gap:clamp(12px,2.2vw,28px);align-items:center;font-size:.88rem;color:var(--dim)}
.nav-links a{transition:color .5s var(--ease)}
.nav-links a:hover{color:var(--ink)}
.nav-cta{border:1px solid var(--panel-line);border-radius:40px;padding:8px 18px;color:var(--ink)!important;
  transition:border-color .5s var(--ease),background .5s var(--ease)}
.nav-cta:hover{border-color:var(--rose);background:rgba(229,169,176,.1)}
@media(max-width:840px){.nav-links a:not(.nav-cta){display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:44px;padding:14px 26px;font-size:.92rem;font-weight:500;
  border:1px solid var(--panel-line);
  transition:transform .8s var(--ease),background .5s var(--ease),border-color .5s var(--ease),box-shadow .8s var(--ease),color .5s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--rose);color:#2a121c;border-color:var(--rose)}
.btn-primary:hover{background:#eebcc2;box-shadow:0 14px 44px -14px rgba(229,169,176,.55)}
.btn-ghost{color:var(--dim)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn-big{padding:17px 34px;font-size:1rem}

/* ---------- hero ---------- */
.hero{max-width:var(--max);margin:0 auto;min-height:100svh;
  padding:clamp(120px,16vh,170px) clamp(18px,4vw,44px) clamp(60px,9vh,110px);
  display:grid;grid-template-columns:1fr;gap:clamp(40px,6vw,64px);align-items:center}
@media(min-width:960px){.hero{grid-template-columns:1.02fr .98fr}}
.eyebrow{margin-bottom:1.4rem}
.hero-sub{max-width:50ch;margin:1.8rem 0 2.2rem;color:var(--dim);font-size:clamp(1rem,1.3vw,1.17rem);font-weight:300}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- breathing ring ---------- */
.hero-breath{display:flex;flex-direction:column;align-items:center;gap:26px}
.breath{position:relative;width:clamp(240px,34vw,350px);aspect-ratio:1;display:grid;place-items:center}
.breath-halo{position:absolute;inset:-16%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(229,169,176,.32),rgba(109,106,224,.16) 55%,transparent 72%);
  filter:blur(18px);will-change:transform,opacity}
.breath-scale{position:absolute;inset:0;will-change:transform}
.breath-ring{position:absolute;inset:0;border-radius:50%;
  background:
    radial-gradient(closest-side,transparent 50%,rgba(229,169,176,.20) 56%,transparent 59%),
    radial-gradient(closest-side,transparent 58.5%,#57536b 61%,#cfccdd 66.5%,#f0edf8 69.5%,#8d89a0 75%,#3f3c52 78.5%,transparent 80%)}
.breath-sheen{position:absolute;inset:0;border-radius:50%;mix-blend-mode:screen;opacity:.65;
  background:conic-gradient(from 215deg,rgba(255,255,255,.6),transparent 16%,transparent 42%,rgba(232,198,138,.35) 55%,transparent 72%,rgba(255,255,255,.45));
  -webkit-mask:radial-gradient(closest-side,transparent 59%,#000 64%,#000 77%,transparent 80.5%);
  mask:radial-gradient(closest-side,transparent 59%,#000 64%,#000 77%,transparent 80.5%)}
.breath-inner{position:absolute;inset:21.5%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(109,106,224,.10),rgba(229,169,176,.07) 60%,transparent 75%)}
.breath-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.35rem;text-align:center}
.breath-phase{font-family:"Instrument Serif",serif;font-style:italic;font-size:clamp(1.3rem,2.4vw,1.7rem);color:var(--ink);
  transition:opacity .8s var(--breath)}
.breath-phase.fading{opacity:.25}
.breath-count{font-family:"DM Mono",monospace;font-size:.86rem;letter-spacing:.3em;color:var(--gold)}
.breath-toggle{font-family:"DM Mono",monospace;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--dim);background:none;border:1px solid var(--line);border-radius:30px;padding:8px 16px;cursor:pointer;
  transition:color .5s var(--ease),border-color .5s var(--ease)}
.breath-toggle:hover{color:var(--ink);border-color:var(--rose)}

/* ---------- section shell ---------- */
section{padding:clamp(78px,12vh,150px) clamp(18px,4vw,44px)}
.section-head{max-width:var(--max);margin:0 auto 3.2rem}
.kicker{margin-bottom:1.1rem}
.lede{max-width:58ch;margin-top:1.2rem;color:var(--dim);font-size:1.08rem;font-weight:300}

/* ---------- panels ---------- */
.panel{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);
  padding:clamp(20px,3vw,30px);backdrop-filter:blur(10px)}
.panel-kicker{margin-bottom:1.4rem}

/* ---------- score section ---------- */
.score{border-top:1px solid var(--line)}
.score-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1fr;gap:22px;align-items:start}
@media(min-width:980px){.score-grid{grid-template-columns:.9fr 1.1fr}}
.score-right{display:grid;gap:22px}

/* dial */
.dial{position:relative;width:min(230px,64vw);margin:0 auto 1.6rem}
.dial svg{display:block;width:100%;height:auto}
.dial-track,.dial-value{fill:none;stroke-width:10;stroke-linecap:round}
.dial-track{stroke:rgba(239,233,244,.10)}
.dial-read{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.2rem}
.dial-num{font-family:"Instrument Serif",serif;font-size:clamp(3.4rem,6vw,4.4rem);line-height:1;color:var(--ink)}
.dial-word{font-family:"DM Mono",monospace;font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;color:var(--rose)}

/* contributors */
.contrib{list-style:none}
.c-row{display:grid;grid-template-columns:7.2em 1fr auto;gap:14px;align-items:center;
  padding:11px 2px;border-bottom:1px solid var(--line)}
.c-row:last-child{border-bottom:0}
.c-name{font-size:.9rem;color:var(--dim)}
.c-bar{height:4px;border-radius:4px;background:rgba(239,233,244,.08);overflow:hidden}
.c-bar i{display:block;height:100%;width:calc(var(--w)*100%);border-radius:4px;
  background:linear-gradient(90deg,var(--indigo),var(--rose));transform-origin:left center}
.c-val{font-family:"DM Mono",monospace;font-size:.8rem;color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.js .c-bar i{transform:scaleX(0)}
.js .contrib.is-in .c-bar i{transform:scaleX(1);transition:transform 1.3s var(--ease);transition-delay:calc(var(--i)*120ms)}

/* hypnogram */
.hypno svg{display:block;width:100%;height:auto}
.row-line{stroke:rgba(239,233,244,.07);stroke-width:1}
.row-label,.tick{font-family:"DM Mono",monospace;font-size:11px;letter-spacing:.14em;fill:var(--dim)}
.tick{fill:var(--faint);letter-spacing:.06em}
@media(max-width:640px){.row-label{font-size:17px}.tick{font-size:16px}}
.seg{transform-box:fill-box;transform-origin:left center}
.sg-awake{fill:var(--gold);opacity:.92}
.sg-rem{fill:var(--rose)}
.sg-light{fill:var(--indigo-soft)}
.sg-deep{fill:var(--indigo)}
.js .hypno .seg{transform:scaleX(0);opacity:0}
.js .hypno.is-in .seg{transform:scaleX(1);opacity:1;
  transition:transform .9s var(--ease),opacity .7s var(--ease);transition-delay:calc(var(--i)*70ms)}
.hypno-legend{list-style:none;display:flex;gap:18px 26px;flex-wrap:wrap;margin-top:1.2rem}
.hypno-legend li{display:flex;align-items:center;gap:8px;font-size:.84rem;color:var(--dim)}
.hypno-legend span{font-family:"DM Mono",monospace;font-size:.78rem;color:var(--ink)}
.chip{width:10px;height:10px;border-radius:4px;flex:none}
.chip-awake{background:var(--gold)}.chip-rem{background:var(--rose)}
.chip-light{background:var(--indigo-soft)}.chip-deep{background:var(--indigo)}

/* coach card */
.coach{border-color:rgba(232,198,138,.28);
  background:linear-gradient(140deg,rgba(232,198,138,.09),rgba(24,19,44,.55) 45%)}
.coach-title{font-family:"Instrument Serif",serif;font-weight:400;font-size:clamp(1.5rem,2.6vw,1.9rem);margin-bottom:.7rem}
.coach-body{color:var(--dim);max-width:56ch}
.coach-meta{margin-top:1.3rem;font-family:"DM Mono",monospace;font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold)}

/* ---------- ring section ---------- */
.ring{border-top:1px solid var(--line)}
.ring-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:1fr;gap:clamp(30px,5vw,56px);align-items:center}
@media(min-width:960px){.ring-grid{grid-template-columns:.95fr 1.05fr}}
.ring-visual{padding:clamp(6px,2vw,20px)}
.ring-visual svg{display:block;width:min(460px,100%);margin:0 auto}
.callout line{stroke:rgba(239,233,244,.35);stroke-width:1;stroke-dasharray:3 4}
.callout circle{fill:none;stroke:rgba(239,233,244,.4);stroke-width:1}
.callout text{font-family:"DM Mono",monospace;font-size:12.5px;letter-spacing:.1em;fill:var(--dim)}
@media(prefers-reduced-motion:no-preference){
  .js .ring-float{animation:floaty 9s var(--breath) infinite alternate}
  @keyframes floaty{from{transform:translateY(0)}to{transform:translateY(-9px)}}
}
.spec-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:640px){.spec-grid{grid-template-columns:1fr 1fr}}
.spec{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--r);
  padding:clamp(20px,2.6vw,28px);backdrop-filter:blur(10px);
  transition:border-color .6s var(--ease),transform .8s var(--ease)}
.spec:hover{border-color:rgba(229,169,176,.35);transform:translateY(-3px)}
.spec-val{font-family:"DM Mono",monospace;font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--rose)}
.spec h3{margin:.8rem 0 .5rem}
.spec p{color:var(--dim);font-size:.95rem;font-weight:300}

/* ---------- science ---------- */
.science{border-top:1px solid var(--line)}
.stats{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(2,1fr);gap:28px 20px}
@media(min-width:820px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{border-left:1px solid var(--panel-line);padding-left:18px}
.s-top{display:flex;align-items:baseline}
.s-num{font-family:"Instrument Serif",serif;font-size:clamp(2.4rem,4.8vw,3.6rem);line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.s-suf{font-family:"Instrument Serif",serif;font-style:italic;font-size:1.25rem;color:var(--gold);margin-left:5px}
.s-lbl{display:block;margin-top:9px;font-family:"DM Mono",monospace;font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim)}
.quote{max-width:760px;margin:clamp(52px,8vh,84px) auto 0;text-align:center}
.quote p{font-family:"Instrument Serif",serif;font-style:italic;font-size:clamp(1.5rem,3.2vw,2.2rem);line-height:1.3;color:var(--ink)}
.quote cite{display:block;margin-top:1.3rem;font-family:"DM Mono",monospace;font-style:normal;font-size:.74rem;
  letter-spacing:.2em;text-transform:uppercase;color:var(--dim)}

/* ---------- closer ---------- */
.closer{text-align:center;padding-block:clamp(100px,17vh,190px)}
.closer-line{font-family:"Instrument Serif",serif;font-size:clamp(2.3rem,6.6vw,4.8rem);line-height:1.1;margin-bottom:2.4rem}
.closer-line em{color:var(--rose)}
.closer-meta{margin-top:1.6rem;font-family:"DM Mono",monospace;font-size:.7rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--dim)}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--line);padding:clamp(40px,6vh,64px) clamp(18px,4vw,44px);
  background:rgba(12,9,24,.55);backdrop-filter:blur(8px)}
.foot-top{max-width:var(--max);margin:0 auto 24px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot-brand{font-family:"Instrument Serif",serif;font-size:1.5rem}
.foot-links{display:flex;gap:20px;font-size:.88rem;color:var(--dim)}
.foot-links a:hover{color:var(--rose)}
.foot-bottom{max-width:var(--max);margin:0 auto;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-family:"DM Mono",monospace;font-size:.7rem;color:var(--dim);letter-spacing:.04em}
.foot-bottom a{color:var(--ink)}
.foot-bottom a:hover{color:var(--rose)}

/* ---------- reveal + hero intro ---------- */
.js .reveal{opacity:0;transform:translateY(26px)}
.js .reveal.is-in{opacity:1;transform:none;transition:opacity 1.3s var(--ease),transform 1.3s var(--ease)}
.js .hero-title .line{overflow:hidden;display:block;padding-bottom:.14em;margin-bottom:-.14em}
.js .hero-title .line>span{display:inline-block;transform:translateY(112%);transition:transform 1.5s var(--ease)}
.hero.loaded .hero-title .line>span{transform:translateY(0)}
.hero.loaded .reveal{opacity:1;transform:none;transition:opacity 1.3s var(--ease),transform 1.3s var(--ease)}
.hero .eyebrow{transition-delay:.08s}
.hero .line:nth-child(1)>span{transition-delay:.18s}
.hero .line:nth-child(2)>span{transition-delay:.34s}
.hero .hero-sub{transition-delay:.52s}
.hero .hero-actions{transition-delay:.66s}
.hero .hero-breath{transition-delay:.5s}

/* ---------- focus ---------- */
a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:8px}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  .reveal,.js .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .hero-title .line>span,.js .hero-title .line>span{transform:none!important;transition:none!important}
  .js .hypno .seg{transform:none!important;opacity:1!important;transition:none!important}
  .js .c-bar i{transform:scaleX(1)!important;transition:none!important}
  .js .ring-float{animation:none!important}
  .breath-phase{transition:none!important}
  .spec,.btn{transition:none!important}
  *{scroll-behavior:auto!important}
}