/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --bg:        #F1EEE7;
  --bg-line:   #E7E2D8;
  --paper:     #FFFFFF;
  --ink:       #1C1B19;
  --ink-soft:  #3A3833;
  --ink-mute:  #6B6862;
  --ink-faint: #9A9589;
  --accent:    #A32B1F;
  --accent-ink:#7C2016;
  --accent-soft: rgba(163,43,31,0.09);
  --line:      rgba(28,27,25,0.14);
  --line-soft: rgba(28,27,25,0.08);

  --serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --sans:  "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono:  "JetBrains Mono", "SFMono-Regular", Menlo, monospace;

  --radius: 3px;
  --radius-sm: 2px;
  --container: 1220px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-soft);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.08; font-family: var(--serif); font-weight: 500; color: var(--ink); }
ul { list-style: none; padding: 0; }
::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* =============================================================
   3. Utilities
   ============================================================= */
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  padding: .6rem 1rem; background: var(--ink); color: var(--bg);
  z-index: 9999; border-radius: var(--radius); font-weight: 500;
  transition: top .2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.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;
}

.mono-tag {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: .9rem;
  max-width: 46rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.section-head .mono-tag { color: var(--accent); }
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
.section-head p { color: var(--ink-mute); font-size: 1.05rem; max-width: 40rem; }

section { padding-block: clamp(4rem, 9vw, 7.5rem); }

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }

/* =============================================================
   4. Buttons
   ============================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .85rem 1.5rem;
  font-size: .92rem;
  font-weight: 600;
  letter-spacing: .01em;
  border-radius: var(--radius-sm);
  transition: background .3s var(--ease-out), color .3s var(--ease-out), border-color .3s var(--ease-out), transform .3s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-ink); }
.btn-outline {
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover { border-color: var(--ink); background: var(--paper); }
.btn-ghost {
  color: var(--ink);
  padding-inline: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding-bottom: .15rem;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
@media (hover: hover) and (pointer: fine) {
  .btn:active { transform: translateY(1px); }
}

.btn-arrow { font-family: var(--mono); font-size: .85rem; }

/* =============================================================
   5. Header
   ============================================================= */
.utility-bar {
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg);
}
.utility-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 2.4rem;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-mute);
  letter-spacing: .02em;
}
.utility-bar a:hover { color: var(--accent); }
.utility-links { display: flex; gap: 1.4rem; }
.utility-links .u-sep { color: var(--ink-faint); }
@media (max-width: 719px) {
  .utility-links a:not(:first-child) { display: none; }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(241,238,231,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.6rem;
}
.brand-mark {
  display: flex;
  align-items: baseline;
  gap: .5rem;
}
.brand-mark .brand-name {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
}
.brand-mark .brand-suffix {
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-left: 1px solid var(--line);
  padding-left: .5rem;
}

.main-nav { display: flex; align-items: center; gap: 2.1rem; }
.main-nav ul { display: flex; gap: 1.9rem; }
.main-nav a {
  font-size: .9rem;
  color: var(--ink-soft);
  position: relative;
  padding-bottom: .3rem;
}
.main-nav a::after {
  content: "";
  position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--accent);
  transition: right .3s var(--ease-out);
}
.main-nav a:hover::after { right: 0; }
.main-nav a:hover { color: var(--ink); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: .4rem;
}
.nav-toggle span { width: 22px; height: 1.5px; background: var(--ink); transition: transform .25s var(--ease-out), opacity .25s var(--ease-out); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 959px) {
  .main-nav ul, .main-nav .btn-outline { display: none; }
  .nav-toggle { display: flex; }
  /* backdrop-filter establishes a containing block for fixed descendants —
     drop it while the mobile panel is open so .main-nav sizes to the viewport. */
  .site-header.is-open { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--bg); }
  .site-header.is-open .main-nav {
    position: fixed; inset: 4.6rem 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    padding: 2rem var(--gutter);
    overflow-y: auto;
  }
  .site-header.is-open .main-nav ul {
    display: flex; flex-direction: column; gap: 0;
  }
  .site-header.is-open .main-nav a {
    display: block; padding: 1rem 0; border-bottom: 1px solid var(--line-soft); font-size: 1.05rem;
  }
  .site-header.is-open .main-nav .btn-outline {
    display: inline-flex; margin-top: 1.5rem; align-self: flex-start;
  }
}

/* =============================================================
   6. Hero
   ============================================================= */
.hero {
  padding-top: clamp(3rem, 7vw, 5rem);
  padding-bottom: clamp(3.5rem, 8vw, 6rem);
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 6vw, 4rem);
  align-items: center;
}
@media (min-width: 960px) {
  .hero .container { grid-template-columns: 0.92fr 1.08fr; }
}

.hero-copy .mono-tag { display: block; margin-bottom: 1.4rem; }
.hero-title {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  letter-spacing: -0.01em;
}
.hero-title .accent { color: var(--accent); }
.hero-sub {
  margin-top: 1.4rem;
  font-size: 1.08rem;
  color: var(--ink-mute);
  max-width: 34rem;
}
.hero-actions {
  margin-top: 2.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.hero-foot {
  margin-top: 2.3rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  font-size: .88rem;
  color: var(--ink-mute);
  max-width: 30rem;
}

.hero-figure {
  position: relative;
}
.hero-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: var(--radius);
}
.hero-frame::before {
  content: "";
  position: absolute; inset: 10px -10px -10px 10px;
  border: 1px solid var(--line);
  z-index: -1;
}
.hero-frame img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(1.02) contrast(1.03);
}

.diag-marker {
  position: absolute;
  left: 34%; top: 40%;
  display: flex;
  align-items: center;
  gap: .6rem;
  opacity: 0;
  transform: translate(-50%, -50%) scale(.85);
  transition: opacity .7s var(--ease-out) .5s, transform .7s var(--ease-out) .5s;
}
.diag-marker.is-visible { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.diag-dot {
  position: relative;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.diag-dot::after {
  content: "";
  position: absolute; inset: -8px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  animation: diagPulse 2.6s var(--ease-soft) infinite;
}
@keyframes diagPulse {
  0% { transform: scale(.6); opacity: .9; }
  100% { transform: scale(1.9); opacity: 0; }
}
.diag-readout {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .01em;
  background: rgba(28,27,25,0.86);
  color: #F1EEE7;
  padding: .4rem .6rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
@media (prefers-reduced-motion: reduce) {
  .diag-dot::after { animation: none; }
}
@media (max-width: 720px) {
  .diag-readout { font-size: .62rem; }
}

.hero-scan {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(241,238,231,.55) 50%, transparent 100%);
  transform: translateY(-100%);
  pointer-events: none;
}
.hero-scan.is-scanning { animation: heroScan 1.4s var(--ease-soft) .2s 1; }
@keyframes heroScan {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-scan { display: none; }
}

/* =============================================================
   7. Problems (dossier list) — native <details>/<summary>
   ============================================================= */
.problems-list {
  border-top: 1px solid var(--line);
}
.problem-row {
  border-bottom: 1px solid var(--line);
}
.problem-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 3rem 1fr auto;
  align-items: center;
  gap: 1.2rem;
  padding-block: 1.5rem;
  text-align: left;
  cursor: pointer;
  list-style: none;
}
.problem-trigger::-webkit-details-marker { display: none; }
.problem-num {
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--ink-faint);
}
.problem-heading { display: flex; flex-direction: column; gap: .3rem; }
.problem-heading h3 {
  font-size: 1.15rem;
  font-family: var(--sans);
  font-weight: 600;
  color: var(--ink);
}
.problem-heading .problem-summary {
  font-size: .92rem;
  color: var(--ink-mute);
  font-family: var(--sans);
}
.problem-chevron {
  width: 26px; height: 26px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform .35s var(--ease-out), border-color .3s var(--ease-out);
}
.problem-row[open] .problem-chevron { transform: rotate(45deg); border-color: var(--accent); }
.problem-trigger:hover .problem-chevron { border-color: var(--ink); }
.problem-chevron svg { width: 11px; height: 11px; }

.problem-detail {
  display: grid;
  gap: 1.6rem;
  padding: 0 0 1.8rem 4.2rem;
}
@media (min-width: 720px) {
  .problem-detail { grid-template-columns: 1fr 1fr; }
}
.problem-detail dt {
  font-family: var(--mono);
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--accent);
  margin-bottom: .5rem;
}
.problem-detail dd { color: var(--ink-mute); font-size: .95rem; }
@media (max-width: 640px) {
  .problem-trigger { grid-template-columns: 2rem 1fr auto; gap: .8rem; }
  .problem-detail { padding-left: 2.8rem; }
}

/* =============================================================
   8. Technical method (process diagram)
   ============================================================= */
.method-diagram {
  display: grid;
  gap: 0;
  position: relative;
}
@media (min-width: 960px) {
  .method-diagram {
    grid-template-columns: repeat(6, 1fr);
  }
  .method-diagram::before {
    content: "";
    position: absolute;
    top: 10px; left: calc(100% / 12); right: calc(100% / 12);
    height: 1px;
    background: var(--line);
  }
}
.method-node {
  position: relative;
  padding-top: 2.4rem;
  padding-right: 1.2rem;
}
.method-node::before {
  content: "";
  position: absolute; top: 6px; left: 0;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink-faint);
  transition: background .4s var(--ease-out), border-color .4s var(--ease-out), transform .4s var(--ease-out);
}
.method-node.is-visible::before {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.15);
}
@media (max-width: 959px) {
  .method-node {
    padding-top: 0;
    padding-left: 1.6rem;
    padding-bottom: 2.2rem;
    border-left: 1px solid var(--line);
  }
  .method-node::before { top: 2px; left: -5.5px; }
  .method-node:last-child { padding-bottom: 0; }
}
.method-index { font-family: var(--mono); font-size: .7rem; color: var(--ink-faint); }
.method-verb { font-size: 1.15rem; margin-top: .4rem; }
.method-detail { font-size: .88rem; color: var(--ink-mute); margin-top: .5rem; max-width: 15rem; }

/* =============================================================
   9. Specialties
   ============================================================= */
.specialty-list { border-top: 1px solid var(--line); }
.specialty-row {
  display: grid;
  grid-template-columns: 3rem 1fr;
  align-items: baseline;
  gap: 1.2rem;
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--line);
  transition: padding-left .35s var(--ease-out), background .35s var(--ease-out);
}
.specialty-row:hover { padding-left: .6rem; background: var(--accent-soft); }
.specialty-row .num { font-family: var(--mono); font-size: .82rem; color: var(--ink-faint); }
.specialty-row .name { font-family: var(--serif); font-size: 1.2rem; color: var(--ink); }

/* =============================================================
   10. Editorial (why diagnosis matters)
   ============================================================= */
.editorial .container {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
}
@media (min-width: 960px) {
  .editorial .container { grid-template-columns: 0.85fr 1.15fr; align-items: start; }
}
.editorial-figure img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  filter: sepia(.12) contrast(1.02);
}
.editorial-figure figcaption {
  font-family: var(--mono);
  font-size: .68rem;
  color: var(--ink-faint);
  margin-top: .7rem;
}
.editorial-body h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  max-width: 22ch;
  margin-bottom: 1.6rem;
}
.editorial-body p {
  font-size: 1.08rem;
  max-width: 58ch;
  margin-bottom: 1.2rem;
  color: var(--ink-soft);
}
.editorial-body p:first-of-type::first-letter {
  font-family: var(--serif);
  font-size: 3.4rem;
  float: left;
  line-height: .78;
  padding-right: .5rem;
  padding-top: .2rem;
  color: var(--accent);
}

/* =============================================================
   11. Request form
   ============================================================= */
.request-section { background: var(--paper); }
.request-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}
@media (min-width: 960px) {
  .request-grid { grid-template-columns: 0.8fr 1.2fr; }
}
.request-aside p { color: var(--ink-mute); margin-top: 1rem; max-width: 26rem; }
.request-aside .btn { margin-top: 1.6rem; }

.form-grid {
  display: grid;
  gap: 1.3rem;
}
@media (min-width: 640px) {
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .full { grid-column: 1 / -1; }
}
.field { display: flex; flex-direction: column; gap: .45rem; }
.field label {
  font-family: var(--mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--ink-mute);
}
.field input,
.field select,
.field textarea {
  font-family: var(--sans);
  font-size: .96rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .75rem .85rem;
  transition: border-color .25s var(--ease-out);
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 7rem; }
.field-hint { font-size: .78rem; color: var(--ink-faint); }
.field-radio-group { display: flex; flex-wrap: wrap; gap: .6rem; }
.field-radio {
  display: flex; align-items: center; gap: .5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: .55rem .9rem;
  font-size: .88rem;
  cursor: pointer;
  transition: border-color .25s var(--ease-out), background .25s var(--ease-out);
}
.field-radio:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.field-radio input { accent-color: var(--accent); }

.form-submit-row {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-top: .6rem;
}
.form-status {
  font-size: .85rem;
  color: var(--ink-mute);
  font-family: var(--mono);
}
.form-status[data-state="ok"] { color: var(--accent); }

/* =============================================================
   12. Contact
   ============================================================= */
.contact-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}
@media (min-width: 960px) {
  .contact-grid { grid-template-columns: 0.9fr 1.1fr; }
}
.contact-list { border-top: 1px solid var(--line); margin-top: 1.8rem; }
.contact-item {
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}
.contact-item .mono-tag { display: block; margin-bottom: .35rem; }
.contact-item a:hover, .contact-item span { color: var(--ink); }
.contact-item a { font-size: 1.02rem; }
.contact-item a:hover { color: var(--accent); }

.map-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.map-frame iframe { width: 100%; height: 100%; border: 0; }

.whatsapp-float {
  position: fixed;
  right: 1.4rem; bottom: 1.4rem;
  z-index: 60;
  display: flex; align-items: center; gap: .6rem;
  background: var(--ink);
  color: var(--bg);
  padding: .8rem 1.1rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(28,27,25,.25);
  transition: transform .3s var(--ease-out), background .3s var(--ease-out);
}
.whatsapp-float:hover { background: var(--accent); transform: translateY(-2px); }
.whatsapp-float svg { width: 18px; height: 18px; flex-shrink: 0; }
@media (max-width: 539px) {
  .whatsapp-float span { display: none; }
  .whatsapp-float { padding: .8rem; }
}

/* =============================================================
   13. Footer
   ============================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: clamp(2.5rem, 5vw, 3.5rem);
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line-soft);
}
.footer-brand .brand-name { font-family: var(--serif); font-size: 1.2rem; color: var(--ink); }
.footer-brand p { color: var(--ink-mute); font-size: .9rem; margin-top: .5rem; max-width: 22rem; }
.footer-links { display: flex; gap: 3rem; flex-wrap: wrap; }
.footer-links h4 {
  font-family: var(--mono); font-size: .68rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--ink-faint); font-weight: 500; margin-bottom: .8rem;
}
.footer-links ul { display: flex; flex-direction: column; gap: .5rem; }
.footer-links a { font-size: .9rem; color: var(--ink-soft); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.6rem;
  font-size: .8rem;
  color: var(--ink-faint);
}
.footer-bottom a:hover { color: var(--accent); }

/* =============================================================
   14. Responsive helpers
   ============================================================= */
@media (max-width: 539px) {
  section { padding-block: 3rem; }
}