/* ============================================================
   KESTREL PHYSIO — sports rehab, measured.
   Palette: cool slate ground + rationed kestrel-coral accent.
   Type: Fraunces (display) · Sora (body) · Space Grotesk (data).
   ============================================================ */

:root{
  /* ground */
  --ink:      #0f1a22;
  --ink-2:    #132330;
  --ink-3:    #0a121a;
  --panel:    #16242f;
  --paper:    #edf1f3;
  --paper-2:  #f7f9fa;

  /* text */
  --text:     #eaf1f6;
  --dim:      #9fb3c0;
  --dim-2:    #8aa1b0;
  --on-paper: #152029;
  --on-paper-dim: #45606f;

  /* accent — kestrel coral */
  --coral:      #ff6a4d;
  --coral-mid:  #f0532f;
  --coral-ink:  #b23e1d;   /* small coral text on paper (5.1:1) */
  --steel:      #6e90a4;   /* baseline / injured tone */

  /* lines */
  --line:        rgba(150,180,200,.14);
  --line-strong: rgba(150,180,200,.24);
  --line-paper:  rgba(20,40,55,.14);

  /* system */
  --ease: cubic-bezier(.22,1,.36,1);
  --pad:  clamp(20px,5vw,80px);
  --maxw: 1180px;

  --f-disp: "Fraunces", Georgia, serif;
  --f-body: "Sora", system-ui, sans-serif;
  --f-data: "Space Grotesk", ui-monospace, monospace;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--ink);
  color:var(--text);
  font-family:var(--f-body);
  font-weight:340;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:none}
::selection{background:var(--coral);color:var(--ink);}

:where(a,button,input,select,textarea):focus-visible{
  outline:2.5px solid var(--coral);
  outline-offset:3px;
  border-radius:3px;
}

.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}
.skip{position:fixed;top:-60px;left:12px;z-index:100;background:var(--coral);color:var(--ink);
  font-family:var(--f-data);font-weight:600;padding:10px 16px;border-radius:8px;transition:top .2s var(--ease)}
.skip:focus{top:12px}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}

/* number rendering */
.ro__v,.scrub__out,.cond-row__rt,.clin__stats dd,.mstep__no,.instrument__title,.kicker,.sec-head__idx{
  font-variant-numeric:tabular-nums;
}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease)}
.nav[data-scrolled="true"]{background:rgba(15,26,34,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav__in{max-width:var(--maxw);margin-inline:auto;padding:16px var(--pad);display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand__mark{display:grid;place-items:center;flex:none}
.brand__word{display:flex;flex-direction:column;line-height:1.1}
.brand__name{font-family:var(--f-disp);font-weight:560;font-size:1.16rem;letter-spacing:-.01em}
.brand__sub{font-family:var(--f-data);font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim-2)}
.nav__links{display:flex;align-items:center;gap:clamp(14px,2.4vw,30px)}
.nav__links a{font-size:.9rem;color:var(--dim);transition:color .2s var(--ease)}
.nav__links a:hover{color:var(--text)}
.nav__cta{padding:9px 18px;border:1px solid var(--coral);border-radius:999px;color:var(--coral)!important;font-weight:500}
.nav__cta:hover{background:var(--coral);color:var(--ink)!important}
@media(max-width:760px){
  .nav__links a:not(.nav__cta){display:none}
  .brand__sub{display:none}
}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding:calc(96px + 4vh) var(--pad) clamp(60px,8vh,100px);overflow:hidden}
.hero::before{ /* diegetic protractor watermark */
  content:"";position:absolute;top:-8%;right:-14%;width:640px;height:640px;max-width:120vw;
  background:
    radial-gradient(circle at 50% 50%, rgba(255,106,77,.06), transparent 62%),
    repeating-conic-gradient(from 180deg at 50% 50%, var(--line) 0 .3deg, transparent .3deg 5deg);
  border-radius:50%;-webkit-mask:radial-gradient(circle,transparent 52%,#000 53%,#000 60%,transparent 61%);
  mask:radial-gradient(circle,transparent 52%,#000 53%,#000 60%,transparent 61%);
  pointer-events:none;opacity:.7}
.hero__grid{position:relative;max-width:var(--maxw);margin-inline:auto;
  display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(30px,5vw,72px);align-items:center}
@media(max-width:940px){.hero__grid{grid-template-columns:1fr;gap:38px}}

.kicker{display:inline-flex;align-items:center;gap:9px;font-size:.72rem;letter-spacing:.22em;
  text-transform:uppercase;color:var(--dim);margin-bottom:22px}
.kicker__dot{width:7px;height:7px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 4px rgba(255,106,77,.16)}

.hero__title{font-family:var(--f-disp);font-weight:400;font-size:clamp(2.7rem,7.6vw,5.4rem);
  line-height:.98;letter-spacing:-.028em;text-wrap:balance;margin-bottom:26px}
.hero__title span{display:block}
.hero__title em{font-style:italic;color:var(--coral)}
.hero__lede{font-size:clamp(1rem,1.15vw,1.14rem);color:var(--dim);max-width:44ch;text-wrap:pretty;margin-bottom:30px}
.hero__lede strong{color:var(--text);font-weight:500}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:20px}
.hero__note{font-family:var(--f-data);font-size:.78rem;color:var(--dim-2);max-width:46ch;line-height:1.5}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:500;
  font-size:.96rem;padding:14px 26px;border-radius:999px;border:1px solid transparent;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);white-space:nowrap}
.btn--primary{background:var(--coral);color:var(--ink);box-shadow:0 10px 30px -12px rgba(255,106,77,.6)}
.btn--primary:hover{transform:translateY(-2px);background:#ff7c62}
.btn--ghost{border-color:var(--line-strong);color:var(--text)}
.btn--ghost:hover{border-color:var(--coral);color:var(--coral)}
.btn--block{width:100%}

/* ---------- the instrument ---------- */
.instrument{background:linear-gradient(180deg,var(--panel),var(--ink-2));
  border:1px solid var(--line);border-radius:20px;padding:clamp(18px,2.4vw,26px);
  box-shadow:0 40px 90px -50px rgba(0,0,0,.9)}
.instrument__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.instrument__title{font-family:var(--f-data);font-size:.7rem;letter-spacing:.28em;text-transform:uppercase;color:var(--coral);font-weight:600}
.instrument__hint{font-size:.78rem;color:var(--dim-2)}

.inst__selector{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.chip{font-family:var(--f-data);font-size:.74rem;letter-spacing:.01em;padding:8px 13px;border-radius:999px;
  border:1px solid var(--line-strong);background:transparent;color:var(--dim);transition:all .2s var(--ease)}
.chip:hover{color:var(--text);border-color:var(--steel)}
.chip[aria-pressed="true"]{background:var(--coral);border-color:var(--coral);color:var(--ink);font-weight:600}

.inst__stage{position:relative;border-radius:14px;overflow:hidden;background:radial-gradient(120% 90% at 30% 20%,#12222d,#0b141c);border:1px solid var(--line)}
.inst__canvas{width:100%;height:auto;aspect-ratio:640/440;display:block}
.inst__readouts{position:absolute;top:14px;right:14px;display:flex;flex-direction:column;gap:12px;text-align:right;pointer-events:none}
.ro__k{display:block;font-family:var(--f-data);font-size:.58rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim-2)}
.ro__v{font-family:var(--f-data);font-size:1.7rem;font-weight:600;color:var(--text);line-height:1;letter-spacing:-.02em}
.ro__u{font-size:.72rem;color:var(--dim);margin-left:2px;letter-spacing:0}

.inst__scrub{margin-top:18px}
.scrub__row{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:9px}
.scrub__label{font-family:var(--f-data);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase;color:var(--dim-2)}
.scrub__out{font-family:var(--f-data);font-size:.82rem;color:var(--coral);font-weight:600}

input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:26px;background:transparent;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:99px;
  background:linear-gradient(90deg,var(--coral) var(--fill,0%),var(--line-strong) var(--fill,0%))}
input[type=range]::-moz-range-track{height:4px;border-radius:99px;background:var(--line-strong)}
input[type=range]::-moz-range-progress{height:4px;border-radius:99px;background:var(--coral)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;margin-top:-8px;border-radius:50%;
  background:#fff;border:3px solid var(--coral);box-shadow:0 4px 12px rgba(0,0,0,.5);transition:transform .15s var(--ease)}
input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:3px solid var(--coral);box-shadow:0 4px 12px rgba(0,0,0,.5)}
input[type=range]:active::-webkit-slider-thumb{transform:scale(1.18)}

.phasebar{display:grid;gap:2px;margin-top:14px;grid-auto-flow:column}
.phase{position:relative;height:30px;border-radius:5px;background:var(--ink-3);display:flex;align-items:center;justify-content:center;
  overflow:hidden;transition:color .3s var(--ease)}
.phase__fill{position:absolute;inset:0;background:linear-gradient(90deg,rgba(110,144,164,.4),rgba(255,106,77,.55));
  transform-origin:left;transform:scaleX(var(--pf,0));transition:transform .3s var(--ease)}
.phase span{position:relative;z-index:1;padding-inline:4px;text-align:center;
  font-family:var(--f-data);font-size:.56rem;letter-spacing:.06em;text-transform:uppercase;color:var(--dim-2);line-height:1.1}
.phase[data-active="true"] span{color:#fff}

/* ============================================================
   CONDITIONS
   ============================================================ */
.conditions{padding:clamp(70px,11vh,130px) 0;border-top:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:clamp(34px,5vw,58px)}
.sec-head--center{margin-inline:auto;text-align:center}
.sec-head__idx{font-family:var(--f-data);font-size:.68rem;letter-spacing:.28em;text-transform:uppercase;color:var(--coral);margin-bottom:16px}
.sec-head__title{font-family:var(--f-disp);font-weight:400;font-size:clamp(1.9rem,4.4vw,3.1rem);line-height:1.04;letter-spacing:-.02em;text-wrap:balance}
.sec-head__sub{margin-top:16px;color:var(--dim);font-size:1.02rem;text-wrap:pretty}

.cond-ledger{list-style:none;border-top:1px solid var(--line)}
.cond-row{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;
  padding:20px 4px;border-bottom:1px solid var(--line);transition:background .25s var(--ease),padding-left .25s var(--ease)}
.cond-row:hover{background:rgba(255,106,77,.04);padding-left:14px}
.cond-row__area{font-family:var(--f-data);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--coral)}
.cond-row__name{color:var(--text);font-size:clamp(1rem,1.6vw,1.18rem)}
.cond-row__rt{font-family:var(--f-data);font-size:.86rem;color:var(--dim);white-space:nowrap;justify-self:end}
@media(max-width:640px){
  .cond-row{grid-template-columns:1fr auto;gap:6px 14px}
  .cond-row__area{grid-column:1/-1}
  .cond-row__rt{grid-row:2}
}

/* ============================================================
   METHOD (light band)
   ============================================================ */
.method{background:var(--paper);color:var(--on-paper);padding:clamp(72px,12vh,140px) 0}
.method .sec-head__idx{color:var(--coral-ink)}
.method .sec-head__title{color:var(--on-paper)}
.method .sec-head__sub{color:var(--on-paper-dim)}
.method-steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-paper);
  border:1px solid var(--line-paper);border-radius:16px;overflow:hidden}
@media(max-width:900px){.method-steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.method-steps{grid-template-columns:1fr}}
.mstep{background:var(--paper-2);padding:clamp(22px,2.6vw,32px);display:flex;flex-direction:column;gap:12px;position:relative}
.mstep__no{font-family:var(--f-data);font-size:.8rem;font-weight:600;color:var(--coral-ink);letter-spacing:.1em}
.mstep__h{font-family:var(--f-disp);font-weight:500;font-size:1.32rem;letter-spacing:-.01em;color:var(--on-paper)}
.mstep__p{font-size:.92rem;color:var(--on-paper-dim);line-height:1.58;flex:1;text-wrap:pretty}
.mstep__gate{font-family:var(--f-data);font-size:.68rem;letter-spacing:.02em;color:var(--coral-ink);
  padding-top:12px;border-top:1px solid var(--line-paper);margin-top:4px}

/* ============================================================
   CLINICIAN
   ============================================================ */
.clinician{padding:clamp(72px,12vh,140px) 0;border-top:1px solid var(--line)}
.clin__grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(30px,5vw,70px);align-items:center}
@media(max-width:840px){.clin__grid{grid-template-columns:1fr;gap:34px}}
.clin__portrait{position:relative;max-width:320px}
.clin__svg{width:100%;height:auto;border-radius:18px;border:1px solid var(--line)}
.clin__badge{position:absolute;bottom:14px;left:14px;font-family:var(--f-data);font-size:.66rem;letter-spacing:.16em;
  background:var(--coral);color:var(--ink);padding:7px 12px;border-radius:8px;font-weight:600}
.clin__name{font-family:var(--f-disp);font-weight:400;font-size:clamp(2rem,4.2vw,3rem);line-height:1.02;letter-spacing:-.02em;margin:14px 0 8px}
.clin__name span{color:var(--dim);font-size:.62em;font-style:italic}
.clin__role{font-family:var(--f-data);font-size:.82rem;letter-spacing:.04em;color:var(--coral);margin-bottom:20px}
.clin__bio{color:var(--dim);font-size:1.02rem;max-width:52ch;text-wrap:pretty;margin-bottom:30px}
.clin__bio em{font-style:italic;color:var(--text)}
.clin__stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
@media(max-width:480px){.clin__stats{grid-template-columns:1fr}}
.stat{background:var(--ink-2);padding:20px}
.stat dt{font-size:.76rem;color:var(--dim-2);margin-bottom:8px;line-height:1.35}
.stat dd{font-family:var(--f-data);font-weight:600;font-size:clamp(1.7rem,3vw,2.2rem);color:var(--text);letter-spacing:-.02em;line-height:1}

/* ============================================================
   TESTIMONIAL
   ============================================================ */
.tstm{padding:clamp(70px,12vh,150px) 0;background:linear-gradient(180deg,var(--ink),var(--ink-3));border-top:1px solid var(--line)}
.tstm__wrap{max-width:900px}
.tstm__q{font-family:var(--f-disp);font-weight:400;font-size:clamp(1.6rem,3.6vw,2.7rem);line-height:1.28;letter-spacing:-.015em;text-wrap:balance}
.tstm__q em{font-style:italic;color:var(--coral)}
.tstm__by{display:flex;align-items:center;gap:16px;margin-top:34px}
.tstm__mark{width:44px;height:44px;border-radius:50%;flex:none;
  background:conic-gradient(from 200deg,var(--coral),var(--steel));position:relative}
.tstm__mark::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--ink-2)}
.tstm__name{font-weight:500;color:var(--text)}
.tstm__meta{font-family:var(--f-data);font-size:.78rem;color:var(--dim-2)}

/* ============================================================
   BOOK + FORM
   ============================================================ */
.book{padding:clamp(72px,12vh,140px) 0;border-top:1px solid var(--line)}
.book__grid{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(34px,5vw,72px);align-items:start}
@media(max-width:860px){.book__grid{grid-template-columns:1fr;gap:40px}}
.book__title{font-family:var(--f-disp);font-weight:400;font-size:clamp(2rem,4.4vw,3.2rem);line-height:1.02;letter-spacing:-.02em;margin-bottom:18px;text-wrap:balance}
.book__p{color:var(--dim);font-size:1.04rem;max-width:44ch;text-wrap:pretty;margin-bottom:26px}
.book__list{list-style:none;display:flex;flex-direction:column;gap:12px;margin-bottom:26px}
.book__list li{position:relative;padding-left:26px;color:var(--text);font-size:.96rem}
.book__list li::before{content:"";position:absolute;left:0;top:.42em;width:11px;height:6px;border-left:2px solid var(--coral);
  border-bottom:2px solid var(--coral);transform:rotate(-45deg)}
.book__addr{font-family:var(--f-data);font-size:.8rem;color:var(--dim-2);line-height:1.7}
.book__addr a{color:var(--coral)}

.form{background:var(--ink-2);border:1px solid var(--line);border-radius:18px;padding:clamp(22px,3vw,34px);
  display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field--full{grid-column:1/-1}
.form>.btn,.form__fine,.form__ok{grid-column:1/-1}
@media(max-width:520px){.form{grid-template-columns:1fr}}
.field label{font-family:var(--f-data);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--dim)}
.field .opt{text-transform:none;letter-spacing:0;color:var(--dim-2)}
.field input,.field select,.field textarea{
  font-family:var(--f-body);font-size:.96rem;color:var(--text);background:var(--ink-3);
  border:1px solid var(--line-strong);border-radius:10px;padding:12px 14px;width:100%;transition:border-color .2s var(--ease),box-shadow .2s var(--ease)}
.field textarea{resize:vertical;min-height:76px}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%239fb3c0' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.field input::placeholder,.field textarea::placeholder{color:#5f7889}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--coral);box-shadow:0 0 0 3px rgba(255,106,77,.16);outline:none}
.field[data-invalid="true"] input,.field[data-invalid="true"] select{border-color:#ff6a4d}
.err{font-family:var(--f-data);font-size:.72rem;color:#ff8f79;line-height:1.4}
.form__fine{font-family:var(--f-data);font-size:.72rem;color:var(--dim-2);line-height:1.5;text-align:center}
.form__ok{background:rgba(255,106,77,.1);border:1px solid var(--coral);border-radius:12px;padding:18px 20px;
  color:var(--text);font-size:.94rem;line-height:1.55}
.form__ok strong{color:var(--coral)}

/* ============================================================
   FOOTER
   ============================================================ */
.foot{border-top:1px solid var(--line);padding:44px 0;background:var(--ink-3)}
.foot__in{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
@media(max-width:640px){.foot__in{grid-template-columns:1fr}}
.foot__brand .brand__name{font-family:var(--f-disp);font-size:1.2rem}
.foot__tag{font-family:var(--f-data);font-size:.74rem;color:var(--dim-2);margin-top:4px;letter-spacing:.02em}
.foot__nav{display:flex;gap:22px}
.foot__nav a{font-size:.86rem;color:var(--dim);transition:color .2s var(--ease)}
.foot__nav a:hover{color:var(--coral)}
.foot__legal{grid-column:1/-1;font-family:var(--f-data);font-size:.68rem;color:var(--dim-2);line-height:1.6;
  padding-top:20px;border-top:1px solid var(--line);max-width:80ch}

/* ============================================================
   REVEAL / MOTION
   ============================================================ */
.js .rise{opacity:0;transform:translateY(26px)}
.js .rise.in{opacity:1;transform:none;transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .reveal{opacity:0;transform:translateY(24px)}
.js .reveal.in{opacity:1;transform:none;transition:opacity .8s var(--ease),transform .8s var(--ease)}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  .js .rise,.js .reveal{opacity:1!important;transform:none!important}
}