/* ————————————————————————————————
   3MPhysio — marketing site
   Brand carried over from the clinical app:
   teal #0D9488, Inter, gray-900 ink.
   ———————————————————————————————— */

:root {
  /* color */
  --bg:          oklch(0.99 0.003 190);
  --surface:     oklch(0.965 0.008 187);
  --ink:         oklch(0.24 0.022 210);
  --ink-soft:    oklch(0.40 0.02 210);
  --teal:        oklch(0.60 0.105 183);   /* ≈ #0D9488 */
  --teal-deep:   oklch(0.31 0.055 192);
  --teal-deeper: oklch(0.245 0.045 196);
  --on-deep:     oklch(0.965 0.01 185);
  --on-deep-soft:oklch(0.83 0.035 185);
  --chalk:       oklch(0.985 0.004 120);
  --amber:       oklch(0.78 0.13 75);

  /* type */
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;

  /* rhythm */
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius-md: 10px;
  --radius-lg: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

a { color: inherit; }

/* ——— buttons ——— */

.btn {
  display: inline-block;
  white-space: nowrap;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.8em 1.5em;
  border-radius: var(--radius-md);
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
              background-color 0.2s ease;
}
.btn:active { transform: scale(0.97); }

.btn-solid { background: oklch(0.53 0.093 183); color: white; } /* ≈ teal/700 — teal/600 misses 4.5:1 with white at this size */
.btn-solid:hover { background: oklch(0.47 0.085 185); }

.btn-chalk { background: var(--chalk); color: var(--teal-deeper); }
.btn-chalk:hover { background: white; transform: translateY(-2px); }

.btn-lg { font-size: 1.05rem; padding: 0.95em 1.8em; }

/* ——— header ——— */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding: 0.9rem var(--gutter);
  background: var(--teal-deeper);
  color: var(--on-deep);
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.35rem;
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.wordmark span { color: var(--teal); }
.site-header .wordmark span { color: var(--on-deep-soft); font-weight: 500; }

.site-nav {
  display: flex;
  gap: 1.75rem;
  margin-inline-start: auto;
}
.site-nav a {
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--on-deep-soft);
  transition: color 0.15s ease;
}
.site-nav a:hover { color: var(--on-deep); }

.nav-toggle { display: none; }

/* ——— hero ——— */

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 85% 10%, oklch(0.36 0.06 190) 0%, transparent 55%),
    var(--teal-deeper);
  color: var(--on-deep);
  padding: clamp(4.5rem, 11vh, 8.5rem) var(--gutter) clamp(5rem, 13vh, 9rem);
}

.hero-inner { max-width: 68rem; margin-inline: auto; position: relative; z-index: 1; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.5rem, 6.5vw, 4.6rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  max-width: 11em;
}

.hero-lede {
  max-width: 34rem;
  margin-top: 1.75rem;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--on-deep-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.75rem;
  margin-top: 2.5rem;
}

.hero-secondary {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--on-deep-soft);
  text-decoration: none;
  border-bottom: 1px solid oklch(0.55 0.04 190);
  padding-bottom: 2px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.hero-secondary:hover { color: var(--on-deep); border-color: var(--on-deep); }

/* route topo graphic */
.hero-route {
  position: absolute;
  right: clamp(-4rem, 2vw, 5rem);
  top: 50%;
  translate: 0 -50%;
  height: min(115%, 620px);
  width: auto;
  opacity: 0.9;
}
.route-line {
  stroke: oklch(0.48 0.07 188);
  stroke-width: 2.5;
  stroke-dasharray: 1;
  stroke-dashoffset: 0;
}
.hold { fill: oklch(0.42 0.06 190); }
.hold-top { fill: var(--amber); }

html.js .route-line {
  stroke-dashoffset: 1;
  animation: draw 2.4s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ——— the 3M method ——— */

.method {
  background: var(--surface);
  padding: clamp(4.5rem, 10vh, 7.5rem) var(--gutter);
}
.method-inner { max-width: 68rem; margin-inline: auto; }

.method-lede {
  margin-top: 1.5rem;
  max-width: 46ch;
  color: var(--ink-soft);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem 3rem;
  margin-top: 3.25rem;
}

.method-grid dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.45rem;
  line-height: 1.15;
  color: var(--teal-deep);
}
.method-grid dd {
  margin-top: 0.7rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
  max-width: 42ch;
}

/* ——— what we treat ——— */

.treat { padding: clamp(4.5rem, 10vh, 7.5rem) var(--gutter); }

.section-head { max-width: 68rem; margin-inline: auto; }

.treat-lede {
  margin-top: 1.5rem;
  max-width: 60ch;
  color: var(--ink-soft);
}

.treat-list {
  list-style: none;
  max-width: 68rem;
  margin: 3.5rem auto 0;
}

.treat-list li {
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) 2fr;
  gap: 1rem 3rem;
  padding: 2.25rem 0;
  border-top: 1px solid oklch(0.88 0.012 190);
}
.treat-list li:last-child { border-bottom: 1px solid oklch(0.88 0.012 190); }

.treat-list h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem);
  line-height: 1.15;
  color: var(--teal-deep);
}
.treat-list p { color: var(--ink-soft); max-width: 60ch; }

/* ——— how it works ——— */

.how {
  background: var(--surface);
  padding: clamp(4.5rem, 10vh, 7.5rem) var(--gutter);
}
.how-inner { max-width: 68rem; margin-inline: auto; }

.how-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem 3rem;
  margin-top: 3.5rem;
  counter-reset: step;
}

.how-steps li { display: flex; gap: 1.25rem; align-items: flex-start; }

.step-n {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  line-height: 1;
  color: var(--chalk);
  background: var(--teal);
  border-radius: 999px;
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.how-steps h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.5rem; }
.how-steps p { color: var(--ink-soft); font-size: 0.98rem; }

/* ——— about ——— */

.about { padding: clamp(4.5rem, 10vh, 7.5rem) var(--gutter); }

.about-inner {
  max-width: 68rem;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(240px, 2fr) 3fr;
  gap: 3.5rem;
  align-items: center;
}

.about-portrait {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px dashed oklch(0.75 0.03 190);
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.about-copy p { margin-top: 1.25rem; color: var(--ink-soft); max-width: 58ch; }
.about-copy p:first-of-type { margin-top: 1.75rem; }

.cred-list {
  list-style: none;
  margin-top: 1.75rem;
  display: grid;
  gap: 0.6rem;
}
.cred-list li {
  padding-left: 1.5rem;
  position: relative;
  color: var(--ink-soft);
  font-size: 0.98rem;
}
.cred-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 600;
}

/* ——— visit ——— */

.visit {
  background: var(--teal-deep);
  color: var(--on-deep);
  padding: clamp(4.5rem, 11vh, 8rem) var(--gutter);
}

.visit-inner {
  max-width: 68rem;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 4rem;
  align-items: start;
}

.visit-copy p {
  margin-top: 1.5rem;
  color: var(--on-deep-soft);
  max-width: 46ch;
}
.visit-copy .btn { margin-top: 2.25rem; }

.visit-alt { font-size: 0.95rem; }
.visit-alt a { color: var(--on-deep); }

.visit-details {
  display: grid;
  gap: 2rem;
  padding-top: 0.5rem;
}
.visit-details dt {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--on-deep-soft);
  margin-bottom: 0.4rem;
}
.visit-details dd { line-height: 1.55; }
.visit-details em { color: var(--on-deep-soft); font-style: normal; }

/* ——— footer ——— */

.site-footer {
  background: var(--teal-deeper);
  color: var(--on-deep-soft);
  padding: 2.5rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
}
.site-footer .wordmark { color: var(--on-deep); font-size: 1.1rem; }
.site-footer .wordmark span { color: var(--on-deep-soft); }
.site-footer p { text-align: right; }
.footer-tagline { color: var(--on-deep); font-weight: 500; }

/* ——— scroll reveals (JS-enhanced; fully visible without JS) ——— */

html.js .reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              translate 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
html.js .reveal.in { opacity: 1; translate: 0 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js .reveal { opacity: 1; translate: none; transition: none; }
  html.js .route-line { animation: none; stroke-dashoffset: 0; }
  .btn, .btn:hover { transition: none; transform: none; }
}

/* ——— responsive ——— */

@media (max-width: 1080px) {
  .site-header { gap: 1.25rem; }
  .site-header > .btn { display: none; }

  .nav-toggle {
    display: grid;
    gap: 5px;
    margin-inline-start: auto;
    background: none;
    border: 0;
    padding: 0.5rem;
    cursor: pointer;
  }
  .nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--on-deep);
    transition: transform 0.25s ease, opacity 0.25s ease;
  }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--teal-deeper);
    padding: 0.5rem 0 1rem;
    border-top: 1px solid oklch(0.35 0.04 192);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 0.85rem var(--gutter); font-size: 1.05rem; }
}

@media (max-width: 860px) {
  .hero-route { display: none; }

  .treat-list li { grid-template-columns: 1fr; padding: 1.9rem 0; }

  .about-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-portrait { max-width: 20rem; }

  .visit-inner { grid-template-columns: 1fr; gap: 3rem; }
}