/* =====================================================================
   PERSONALISED RESISTANCE TRAINING CONSORTIUM — STYLESHEET
   You should not normally need to edit this file. All everyday text
   edits happen in index.html. See HOW-TO-UPDATE.md for guidance.
   ===================================================================== */

:root{
  /* ---- colour tokens ---- */
  --ink:        #16181d;   /* near-black, primary text, matches logo mark */
  --navy:       #24384c;   /* deep slate blue, matches logo figure */
  --navy-2:     #2f4c66;   /* lighter slate blue, secondary accents */
  --paper:      #f6f4ef;   /* warm off-white page background */
  --paper-2:    #ffffff;   /* card background */
  --line:       #e2ddd1;   /* hairline borders */
  --muted:      #5b6470;   /* secondary text */
  --gold:       #b98a3e;   /* signal accent — "the dose amid the noise" */
  --gold-ink:   #7a5a26;   /* accent text on light background */

  /* ---- type ---- */
  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --container: 1120px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-align: justify;
  text-align-last: left;
}

img{ max-width: 100%; display: block; }
a{ color: inherit; }

.wrap{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 0.5em 0;
  color: var(--ink);
  letter-spacing: -0.01em;
  text-align: left;
}

h2{ font-size: clamp(1.7rem, 3.2vw, 2.5rem); }
h3{ font-size: 1.15rem; }

p{ margin: 0 0 1em 0; }

.eyebrow{
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-ink);
  margin-bottom: 14px;
}
.eyebrow::before{
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  display: inline-block;
}

.lede{
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 62ch;
}

/* ---- skip link ---- */
.skip-link{
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus{
  left: 16px;
  top: 16px;
}

/* ---- buttons ---- */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 3px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color .15s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn:focus-visible{ outline: 2px solid var(--gold); outline-offset: 3px; }

.btn-primary{ background: var(--ink); color: #fff; }
.btn-primary:hover{ background: var(--navy); }

.btn-ghost{ background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover{ border-color: var(--ink); }

.btn-gold{ background: var(--gold); color: #fff; }
.btn-gold:hover{ background: var(--gold-ink); }

.cta-row{ display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; justify-content: flex-start; }

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,244,239,0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  flex-shrink: 0;
}
.brand img{ height: 46px; width: auto; }
.brand-name{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  line-height: 1.25;
  max-width: 190px;
}

nav.primary-nav ul{
  list-style: none;
  display: flex;
  gap: 17px;
  margin: 0;
  padding: 0;
}
nav.primary-nav a{
  display: inline-block;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
nav.primary-nav a:hover{ border-bottom-color: var(--gold); }

.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 8px 10px;
  font-size: 1rem;
  cursor: pointer;
  flex-shrink: 0;
}

@media (max-width: 1040px){
  .nav-toggle{ display: inline-flex; }
  nav.primary-nav{
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  nav.primary-nav.open{ display: block; }
  nav.primary-nav ul{
    flex-direction: column;
    gap: 0;
    padding: 6px 28px 18px;
  }
  nav.primary-nav a{
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    white-space: normal;
  }
}

/* =====================================================================
   HERO
   ===================================================================== */
.hero{
  padding: 84px 0 40px;
  position: relative;
  overflow: hidden;
}
.hero .wrap{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero h1{
  font-size: clamp(2.8rem, 6.4vw, 4.4rem);
  max-width: 14ch;
}
.hero .lede{ margin-top: 18px; }

.hero-visual{ width: 100%; max-width: 520px; }
.hero-visual svg{ width: 100%; height: auto; }

@media (max-width: 900px){
  .hero .wrap{ grid-template-columns: 1fr; }
  .hero{ padding-top: 56px; }
  .hero-visual{ margin-top: 24px; }
}

/* =====================================================================
   SECTION SCAFFOLDING
   ===================================================================== */
section{ padding: 76px 0; background: var(--paper); }
section + section{ border-top: 1px solid var(--line); }

.section-head{
  max-width: 62ch;
  margin: 0 0 44px;
}

.tag-dark{ background: var(--ink); }
.tag-dark .eyebrow{ color: #d8b877; }
.tag-dark .eyebrow::before{ background: var(--gold); }
/* Bare text sitting directly on the dark background */
.tag-dark .section-head h2{ color: #fff; }
.tag-dark .section-head .lede{ color: #c6cbd2; }
.tag-dark.hero h1{ color: #fff; }
.tag-dark.hero .lede{ color: #c6cbd2; }
.tag-dark .step .num{ color: #d8b877; }
.tag-dark .step h3{ color: #fff; }
.tag-dark .step p{ color: #fff; }
.tag-dark .step{ border-top-color: var(--gold); }
/* Cards, the paper-card, member items, and the pathway box keep their own
   white background wherever they appear, so their text intentionally
   stays dark and is NOT overridden here — it's already correctly
   contrasted against their own white surface regardless of section colour. */

/* =====================================================================
   PATHWAY DIAGRAM (Treatment -> Exposure -> Dose -> Response)
   ===================================================================== */
.pathway{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper-2);
}
.pathway-step{
  padding: 26px 22px;
  position: relative;
  border-right: 1px solid var(--line);
}
.pathway-step:last-child{ border-right: none; }
.pathway-step .step-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold-ink);
  display: block;
  margin-bottom: 8px;
}
.pathway-step h3{ margin-bottom: 8px; font-size: 1.05rem; }
.pathway-step p{ font-size: 0.92rem; color: var(--muted); margin: 0; }

@media (max-width: 820px){
  .pathway{ grid-template-columns: 1fr; }
  .pathway-step{ border-right: none; border-bottom: 1px solid var(--line); }
  .pathway-step:last-child{ border-bottom: none; }
}

/* =====================================================================
   FRAMEWORK FIGURE (reproduced from the pre-print)
   ===================================================================== */
.framework-figure{
  margin: 40px 0 0;
  padding: 28px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.framework-figure img{
  width: 100%;
  height: auto;
  margin: 0 auto;
}
.framework-figure figcaption{
  margin-top: 16px;
  font-size: 0.86rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* =====================================================================
   FOCUS AREA CARDS
   ===================================================================== */
.card-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}
.card{
  background: var(--paper-2);
  padding: 32px;
}
.card .letter{
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--gold);
  display: block;
  margin-bottom: 10px;
}
.card h3{ margin-bottom: 10px; }
.card p{ color: var(--muted); font-size: 0.96rem; margin: 0; }

@media (max-width: 700px){
  .card-grid{ grid-template-columns: 1fr; }
}

/* =====================================================================
   PROCESS STEPS (how we work)
   ===================================================================== */
.steps{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 8px;
}
.step{
  border-top: 2px solid var(--gold);
  padding-top: 18px;
}
.step .num{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gold-ink);
  display: block;
  margin-bottom: 10px;
}
.step h3{ margin-bottom: 8px; }
.step p{ color: var(--muted); font-size: 0.96rem; margin: 0; }

@media (max-width: 780px){
  .steps{ grid-template-columns: 1fr; }
}

/* =====================================================================
   RESOURCE / FOUNDING PAPER CARD
   ===================================================================== */
.paper-card{
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper-2);
  padding: 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 26px;
  align-items: start;
}
.paper-card .mark{
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.3rem;
}
.paper-card h3{ font-size: 1.25rem; margin-bottom: 10px; }
.paper-card .authors{ color: var(--muted); font-size: 0.95rem; margin-bottom: 4px; }
.paper-card .meta{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.paper-links{ display: flex; gap: 22px; flex-wrap: wrap; margin-top: 10px; }
.paper-links a{
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
}
.paper-links a:hover{ color: var(--gold-ink); }

@media (max-width: 600px){
  .paper-card{ grid-template-columns: 1fr; }
}

/* =====================================================================
   MEMBERS (accordion / "dropdown" list)
   ===================================================================== */
.member-list{
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
  text-align: left;
}
.member-item{
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper-2);
  overflow: hidden;
}
.member-item summary{
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 22px;
  cursor: pointer;
  list-style: none;
}
.member-item summary::-webkit-details-marker{ display: none; }
.member-item summary::marker{ content: ""; }
.member-item summary:hover{ background: var(--paper); }
.member-item summary:focus-visible{ outline: 2px solid var(--gold); outline-offset: -2px; }
.member-thumb{
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.member-heading{
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}
.member-name{ font-weight: 700; font-size: 1.02rem; }
.member-role{ font-size: 0.84rem; color: var(--muted); font-family: var(--font-mono); }
.chev{
  color: var(--gold-ink);
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.member-item[open] .chev{ transform: rotate(180deg); }
.member-bio{
  display: flex;
  gap: 22px;
  align-items: flex-start;
  padding: 20px 22px 26px;
  border-top: 1px solid var(--line);
}
.member-bio p{ margin: 0; color: var(--muted); text-align: justify; text-align-last: left; }
.member-photo{
  width: 88px;
  height: 88px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}
@media (max-width: 560px){
  .member-bio{ flex-direction: column; align-items: center; text-align: center; }
  .member-bio p{ text-align: center; text-align-last: center; }
}

/* =====================================================================
   EDUCATION
   ===================================================================== */
.placeholder-tag{
  display: inline-block;
  margin-top: 14px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gold-ink);
  background: rgba(185,138,62,0.14);
  border-radius: 3px;
}

/* =====================================================================
   GET INVOLVED
   ===================================================================== */
.involved-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 800px){
  .involved-grid{ grid-template-columns: 1fr; }
}
.involved-list{ list-style: none; margin: 0; padding: 0; }
.involved-list li{
  padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 0.98rem;
  color: var(--muted);
}
.involved-list li:last-child{ border-bottom: 1px solid var(--line); }
.involved-list strong{ color: var(--ink); display:block; margin-bottom: 3px; }

/* =====================================================================
   FOOTER
   ===================================================================== */
footer.site-footer{
  background: var(--ink);
  color: #cfd3d9;
  padding: 60px 0 30px;
}
footer.site-footer .foot-top{
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 34px;
  border-bottom: 1px solid #333844;
}
footer.site-footer .foot-col{ flex: 1 1 220px; max-width: 300px; }
footer.site-footer img{ height: 46px; margin: 0 0 14px; }
footer.site-footer h3{ color: #fff; font-size: 0.95rem; margin-bottom: 14px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: .05em; }
footer.site-footer a{ text-decoration: none; color: #cfd3d9; }
footer.site-footer a:hover{ color: #fff; }
footer.site-footer ul{ list-style: none; margin: 0; padding: 0; }
footer.site-footer li{ margin-bottom: 10px; font-size: 0.92rem; }
footer.site-footer li.contact-person{
  display: flex;
  flex-direction: column;
  gap: 3px;
}
footer.site-footer li.contact-person .name{ color: #fff; font-weight: 600; }
footer.site-footer li.contact-person .affil{ color: #aeb3bb; font-size: 0.88rem; }
footer.site-footer .foot-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 22px;
  font-size: 0.82rem;
  color: #8a8f99;
}
.foot-col p{ max-width: 34ch; font-size: 0.92rem; color: #aeb3bb; }

.privacy-link{
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border: 1px solid #3a3f4a;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: #cfd3d9;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.privacy-link:hover{ border-color: var(--gold); color: #fff; }

/* =====================================================================
   STANDALONE CONTENT PAGES (e.g. privacy.html)
   ===================================================================== */
.legal-wrap{ max-width: 760px; }
.page-title{ font-size: clamp(2.2rem, 4.5vw, 3rem); }