/* =====================================================================
   Sessions · Resonance Breathing (resonance.html only)
   Uses the shared tokens from styles.css. All classes prefixed rb-.
   ===================================================================== */

.rb-hero h1{max-width:15ch}
.rb-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.rb-tags span{font-size:13px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:5px 14px}
.rb-tags .c{color:var(--cyan);border-color:rgba(0,196,255,.35)}

/* pacer */
.rb-pacer{padding:clamp(20px,3vw,30px);display:grid;gap:18px}
.rb-pacer svg{width:100%;height:auto;display:block}
.rb-pacer-row{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.rb-cue{font-size:clamp(1.6rem,2.6vw,2.1rem);font-weight:300;letter-spacing:-.03em;min-width:7ch}
.rb-rate{color:var(--muted);font-size:.92rem}
.rb-rate b{color:var(--cyan);font-weight:600;font-size:1.1rem}
.rb-pacer .micro{max-width:36ch}
.rb-ghost{border:1px solid var(--line);border-radius:999px;min-height:44px;padding:0 20px;font-size:.92rem;transition:border-color 400ms}
.rb-ghost:hover{border-color:var(--cyan)}

/* section heads + text */
.rb-head{max-width:780px;margin-bottom:clamp(36px,5vw,56px)}
.rb-head .lede{margin-top:20px}
.rb-muted{color:var(--muted)}
.rb-fine{font-size:.82rem;color:var(--muted);opacity:.85;margin-top:12px}
.rb-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(24px,4vw,48px)}
.rb-three h3{font-size:1.05rem;letter-spacing:-.01em;margin:0 0 10px;color:var(--cyan)}
.rb-three p{color:var(--muted);font-size:.98rem}
.rb-three .rb-big{font-size:clamp(1.35rem,2vw,1.65rem);font-weight:300;line-height:1.2;letter-spacing:-.025em;color:var(--ink);margin-bottom:14px}

/* interactive model */
.rb-model{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:clamp(20px,3vw,32px);margin-top:clamp(40px,6vw,64px);padding:clamp(18px,3vw,30px)}
.rb-model svg{width:100%;height:auto;display:block}
.rb-model label{display:block;font-weight:500;margin-bottom:8px}
.rb-model input[type=range]{width:100%;accent-color:#00C4FF;min-height:44px}
.rb-key{display:flex;gap:18px;flex-wrap:wrap;font-size:.86rem;color:var(--muted);margin-top:10px}
.rb-key span{display:inline-flex;align-items:center;gap:8px}
.rb-key i{width:22px;height:0;border-top:3px solid}
.rb-readout{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}
.rb-readout > div{background:var(--obsidian);border:1px solid var(--hair);border-radius:14px;padding:12px 14px}
.rb-readout .k{color:var(--muted);font-size:.8rem}
.rb-readout .v{font-size:1.8rem;font-weight:300;letter-spacing:-.03em;line-height:1.15}
.rb-readout .v.sm{font-size:1.15rem;font-weight:500;letter-spacing:-.01em;padding-top:6px}

/* anatomy */
.rb-anat-wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(32px,5vw,64px);align-items:start}
.rb-anat-rev{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}
.rb-anat-fig{margin:0;background:radial-gradient(ellipse at 50% 40%,#142036 0%,var(--obsidian) 70%);border:1px solid var(--hair);border-radius:var(--r-lg);overflow:hidden;position:sticky;top:110px}
.rb-anat-fig svg{width:100%;height:auto;display:block}
.rb-anat-fig figcaption{padding:14px 20px 18px;color:var(--muted);font-size:.82rem;border-top:1px solid var(--hair)}
.rb-anat .flow{animation:rb-flow 2.4s linear infinite}
@keyframes rb-flow{to{stroke-dashoffset:-32}}
@media (prefers-reduced-motion:reduce){.rb-anat .flow{animation-duration:7s}}
.rb-keys{margin-top:28px;border-top:1px solid var(--hair)}
.rb-keys li{display:grid;grid-template-columns:34px 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--hair)}
.rb-keys .n{width:28px;height:28px;border-radius:50%;border:1.5px solid var(--cyan);display:grid;place-items:center;font-size:.8rem;font-weight:600}
.rb-keys .n.r{border-color:var(--nir-soft)} .rb-keys .n.a{border-color:#E8B86A}
.rb-keys b{font-weight:600;display:block}
.rb-keys span{color:var(--muted);font-size:.94rem}
.rb-legend{display:grid;gap:10px;margin-top:22px;padding:16px 18px;background:var(--obsidian);border:1px solid var(--hair);border-radius:14px;font-size:.88rem;color:var(--muted)}
.rb-legend span{display:flex;align-items:center;gap:12px}
.rb-legend i{flex:0 0 34px;height:0}
.rb-split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(28px,5vw,64px);align-items:start}
.rb-after{margin-top:clamp(40px,6vw,64px)}
.rb-after h3{margin-bottom:6px}
.rb-steps{margin-top:22px;counter-reset:s}
.rb-steps li{counter-increment:s;display:grid;grid-template-columns:40px 1fr;gap:12px;padding:14px 0;border-top:1px solid var(--hair);color:var(--muted)}
.rb-steps li::before{content:counter(s,decimal-leading-zero);font-size:.8rem;font-weight:700;letter-spacing:.06em;color:var(--cyan);padding-top:4px}
.rb-steps b{color:var(--ink);font-weight:600}
.rb-note{background:var(--obsidian);border:1px solid var(--hair);border-radius:16px;padding:18px 20px;color:var(--muted);font-size:.94rem;margin-bottom:14px}
.band .rb-note{background:rgba(11,15,23,.6)}
.sec:not(.band) .rb-note{background:var(--mid)}
.rb-note b{color:var(--ink);font-weight:600}

/* HRV strips */
.rb-hrv{display:grid;gap:14px}
.rb-strip{margin:0;background:var(--obsidian);border:1px solid var(--hair);border-radius:18px;padding:16px 18px}
.rb-strip .hd{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:4px}
.rb-strip .hd b{font-weight:600}
.rb-strip .hd span{color:var(--muted);font-size:.86rem}
.rb-strip svg{width:100%;height:auto;display:block}

/* Resonant app */
.rb-app{display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(40px,6vw,80px);align-items:center}
.rb-phone{width:300px;border-radius:46px;padding:12px;background:linear-gradient(160deg,#2B3446,#0E131D);box-shadow:0 40px 80px -30px rgba(0,196,255,.35),inset 0 0 0 1px #3A4458;margin:0 auto}
.rb-phone .scr{border-radius:36px;background:#000;overflow:hidden;aspect-ratio:9/19;display:flex;flex-direction:column}
.rb-phone .bar{display:flex;justify-content:space-between;align-items:center;padding:22px 18px 6px;color:#fff}
.rb-phone .bar b{font-family:-apple-system,"SF Pro Display",var(--sans);font-weight:700;font-size:1.05rem}
.rb-phone svg.wave{width:100%;flex:1;display:block}
.rb-phone .scale{padding:6px 10px 20px;display:grid;gap:6px}
.rb-phone .scale div{display:grid;grid-template-columns:24px 1fr 20px;gap:6px;align-items:center;color:#8E8E93;font-size:.62rem}
.rb-phone .scale i{height:1px;background:#3A3A3C}
.rb-result{background:linear-gradient(135deg,rgba(0,196,255,.10),transparent 60%),var(--mid);border:1px solid var(--hair);border-radius:18px;padding:20px 22px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-top:24px}
.rb-result .lab{color:var(--muted);font-size:.88rem}
.rb-result b{font-weight:600}
.rb-result .num{font-size:2.8rem;font-weight:300;letter-spacing:-.04em;line-height:1;color:var(--cyan)}
.rb-result .num small{font-size:.84rem;letter-spacing:0;color:var(--muted);margin-left:8px}
.rb-feat{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
.rb-feat > div{background:var(--mid);border:1px solid var(--hair);border-radius:14px;padding:14px 16px}
.rb-feat b{display:block;font-weight:600}
.rb-feat span{color:var(--muted);font-size:.88rem}

/* research */
.rb-papers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.rb-paper{background:var(--obsidian);border:1px solid var(--hair);border-radius:18px;padding:22px;display:flex;flex-direction:column;gap:10px;transition:border-color 600ms var(--ease)}
.rb-paper:hover{border-color:rgba(0,196,255,.3)}
.rb-paper .yr{color:var(--cyan);font-weight:600;font-size:.82rem;letter-spacing:.04em}
.rb-paper h3{font-size:1.08rem;line-height:1.3;letter-spacing:-.015em}
.rb-paper p{color:var(--muted);font-size:.93rem;margin:0}
.rb-paper .src{font-size:.8rem;margin-top:auto;padding-top:6px;opacity:.9;overflow-wrap:anywhere}
.rb-paper .src a{color:var(--cyan)}
.rb-honest{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:36px}
.rb-honest > div{background:var(--obsidian);border:1px solid var(--hair);border-radius:18px;padding:22px}
.rb-honest h3{font-size:1.05rem;letter-spacing:-.01em;margin-bottom:12px}
.rb-honest ul,.rb-list{list-style:disc;padding-left:18px;color:var(--muted);font-size:.94rem}
.rb-honest li,.rb-list li{margin-bottom:8px}
.rb-list{margin:18px 0}

/* T×P rows */
.rb-rows{border-top:1px solid var(--hair)}
.rb-rows > div{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-bottom:1px solid var(--hair)}
.rb-rows > div > :first-child{font-weight:600}
.rb-rows > div > :last-child{color:var(--muted);text-align:right}

/* closing CTA */
.rb-cta{padding-top:clamp(56px,8vw,96px)}
.rb-cta-box{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;padding:clamp(26px,4vw,48px)}
.rb-cta-box .kicker{margin-bottom:14px}

@media (max-width:899px){
  .rb-three,.rb-papers,.rb-honest,.rb-split,.rb-anat-wrap,.rb-anat-rev,.rb-model,.rb-app{grid-template-columns:1fr}
  .rb-anat-fig{position:static}
  .rb-anat-wrap > figure{max-width:560px;width:100%;margin-inline:auto}
}
@media (max-width:600px){
  .rb-phone{width:250px;border-radius:40px}
  .rb-phone .scr{border-radius:30px}
  .rb-rows > div{flex-direction:column;gap:4px}
  .rb-rows > div > :last-child{text-align:left}
  .rb-cta-box .btn{width:100%;white-space:normal}
  .rb-result .num{font-size:2.3rem}
}

/* heading to intro spacing */
.rb-anat-wrap h2 + .lede,.rb-split h2 + .lede,.rb-app h2 + .lede{margin-top:20px}

/* ===================== motion layer ===================== */
/* hero breathing orb */
.rb-hero{position:relative}
.rb-orb{position:absolute;left:0;top:0;width:100%;height:100%;z-index:0;pointer-events:none}
.rb-pacer{position:relative;z-index:1}
/* illustrative heart trace in the pacer */
.rb-ecg{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:16px;padding-top:14px;border-top:1px solid var(--hair)}
.rb-hr{display:grid;grid-template-columns:auto auto;align-items:baseline;column-gap:6px;color:var(--nir-soft)}
.rb-hr .rb-heart{width:16px;height:16px;align-self:center;transform-origin:center;transition:transform 180ms var(--ease)}
.rb-hr .rb-heart.beat{transform:scale(1.35)}
.rb-hr b{font-size:1.9rem;font-weight:300;letter-spacing:-.03em;color:var(--ink);line-height:1;grid-column:2;grid-row:1;min-width:2ch}
.rb-hr span{grid-column:2;grid-row:1;margin-left:2.6ch;font-size:.8rem;color:var(--muted)}
.rb-hr small{grid-column:1/-1;font-size:.7rem;letter-spacing:.06em;color:var(--faint);margin-top:4px;white-space:nowrap}
.rb-ecg-line{width:100%;height:60px;display:block;overflow:visible}
#rb-ecg-dot{filter:drop-shadow(0 0 6px #FF6B80)}
/* anatomy: travelling signal pulses + marker pings */
.rb-pulse{pointer-events:none}
.rb-ping{transform-box:fill-box;transform-origin:center;opacity:0;pointer-events:none}
.rb-mk{cursor:default}
.rb-mk > circle:not(.rb-ping){transition:fill 300ms}
.rb-mk.ping .rb-ping{animation:rb-ping 1.5s cubic-bezier(.2,.7,.3,1)}
.rb-mk.hot .rb-ping{animation:rb-ping 1.3s cubic-bezier(.2,.7,.3,1) infinite}
.rb-mk.hot > circle:not(.rb-ping){fill:#0F2C44}
@keyframes rb-ping{0%{transform:scale(1);opacity:.9}100%{transform:scale(2.5);opacity:0}}
.rb-keys li{transition:background 300ms;border-radius:10px}
.rb-keys li.hot{background:rgba(0,196,255,.05)}
.rb-keys li .n{transition:background 300ms,box-shadow 300ms}
.rb-keys li.hot .n{background:rgba(0,196,255,.18);box-shadow:0 0 0 5px rgba(0,196,255,.1)}
.rb-keys li.hot .n.r{background:rgba(255,107,128,.18);box-shadow:0 0 0 5px rgba(255,107,128,.1)}
.rb-keys li.hot .n.a{background:rgba(232,184,106,.18);box-shadow:0 0 0 5px rgba(232,184,106,.1)}
/* HRV strips draw themselves on */
.rb-anim .rb-trace{transition:stroke-dashoffset 2.4s cubic-bezier(.45,0,.2,1)}
.rb-anim svg > line,.rb-anim svg > text{opacity:0;transition:opacity .9s ease 1.4s}
.rb-anim.rb-drawn svg > line,.rb-anim.rb-drawn svg > text{opacity:1}
.rb-cursor{opacity:0;transition:opacity .6s ease 2.4s}
.rb-anim.rb-drawn .rb-cursor{opacity:1}
@media (prefers-reduced-motion:reduce){.rb-anim .rb-trace{transition-duration:4s}}
.rb-hr{display:flex;flex-wrap:wrap;align-items:center;gap:2px 7px;width:128px}
.rb-hr b{grid-column:auto;grid-row:auto;min-width:0}
.rb-hr span{grid-column:auto;grid-row:auto;margin-left:0;align-self:flex-end;padding-bottom:3px}
.rb-hr small{flex-basis:100%;margin-top:2px}
.rb-orb{-webkit-mask-image:radial-gradient(closest-side,#000 72%,transparent);mask-image:radial-gradient(closest-side,#000 72%,transparent)}

/* Reduced motion: the site-wide rule cuts animations to a blink; here they stay, just slower and calmer. */
@media (prefers-reduced-motion:reduce){
  .rb-anat .flow{animation-duration:7s!important;animation-iteration-count:infinite!important}
  .rb-mk.ping .rb-ping{animation-duration:2.4s!important}
  .rb-mk.hot .rb-ping{animation-duration:2.4s!important;animation-iteration-count:infinite!important}
  .rb-anim .rb-trace{transition:stroke-dashoffset 4s cubic-bezier(.45,0,.2,1)!important}
  .rb-anim svg > line,.rb-anim svg > text{transition:opacity 1.2s ease 2.4s!important}
  .rb-cursor{transition:opacity .8s ease 4s!important}
}