/* ============================================================
   The Spine Myths — patient education site
   Design system: white ground, deep navy text, single calm teal accent.
   Own visual identity — independent of any commercial brand.
   ============================================================ */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #F7FAFB;
  --color-navy: #0B1F3A;
  --color-navy-soft: #445266;
  --color-border: #E3E9EE;
  --color-accent: #0E7C7B;
  --color-accent-dark: #0A5F5E;
  --color-accent-tint: #E7F4F3;
  --color-amber: #8A5A00;
  --color-amber-tint: #FBF0DC;
  --color-amber-border: #EAD3A0;
  --color-red: #9C2B26;
  --color-red-tint: #FBEAE9;
  --color-red-border: #E9BDB9;
  --color-slate: #46566B;
  --color-slate-tint: #EEF1F4;

  --font-body: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Atkinson Hyperlegible", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --max-content: 42rem;
  --max-wide: 72rem;
  --radius: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-navy);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--color-accent-dark); text-underline-offset: 3px; }
a:hover { color: var(--color-accent); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-navy);
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(1.9rem, 1.5rem + 1.8vw, 2.75rem); }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); margin-top: 2em; }
h3 { font-size: 1.25rem; margin-top: 1.6em; }
p { margin: 0 0 1.15em; }
ul, ol { padding-left: 1.4em; }
li { margin-bottom: 0.6em; }

.container { max-width: var(--max-content); margin: 0 auto; padding: 0 1.25rem; }
.container-wide { max-width: var(--max-wide); margin: 0 auto; padding: 0 1.25rem; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-navy); color: #fff;
  padding: 0.75em 1.25em; z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1.1rem 0;
}
.site-header .container-wide { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 0.65rem; text-decoration: none; color: var(--color-navy); }
.brand .mark { width: 34px; height: 34px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 800; font-size: 1.15rem; letter-spacing: 0.01em; }
.brand-tagline { font-size: 0.78rem; color: var(--color-navy-soft); font-weight: 400; }
.header-nav { font-size: 0.95rem; }
.header-nav a { color: var(--color-navy-soft); text-decoration: none; font-weight: 600; }
.header-nav a:hover { color: var(--color-accent-dark); }

.breadcrumb {
  font-size: 0.85rem; color: var(--color-navy-soft); margin: 1.5rem 0 0.5rem;
}
.breadcrumb a { color: var(--color-navy-soft); }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: 0.08em;
  font-size: 0.78rem; font-weight: 700; color: var(--color-accent-dark);
  background: var(--color-accent-tint); padding: 0.3em 0.75em; border-radius: 999px;
  margin-bottom: 0.9rem;
}

.hero { padding: 2.75rem 0 2rem; }
.hero-kicker { color: var(--color-accent-dark); font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.85rem; margin-bottom: 0.75rem; }
.hero h1 { margin-bottom: 0.35em; }
.hero .subtitle { font-size: 1.25rem; color: var(--color-navy-soft); max-width: 46rem; }
.credibility {
  display: flex; align-items: center; gap: 0.85rem; margin-top: 1.6rem; padding: 1rem 1.15rem;
  background: var(--color-bg-soft); border: 1px solid var(--color-border); border-radius: var(--radius);
  max-width: 44rem;
}
.credibility .avatar-mark { width: 44px; height: 44px; flex: none; }
.credibility strong { display: block; font-size: 1.02rem; }
.credibility span { color: var(--color-navy-soft); font-size: 0.92rem; }
.stat-strip { display: flex; gap: 1.75rem; margin-top: 1.75rem; flex-wrap: wrap; }
.stat-strip .stat-num { font-size: 1.6rem; font-weight: 800; color: var(--color-navy); display: block; }
.stat-strip .stat-label { font-size: 0.82rem; color: var(--color-navy-soft); text-transform: uppercase; letter-spacing: 0.06em; }

.divider { margin: 2.25rem 0; opacity: 0.9; }
.divider svg { width: 100%; height: 22px; }

.foreword { background: var(--color-bg-soft); border-radius: var(--radius); padding: 2rem 1.5rem; margin: 1.5rem 0 2.5rem; }
.foreword h2 { margin-top: 0; }
.foreword .signoff { margin-top: 1.5rem; font-weight: 700; color: var(--color-navy); }
.foreword .signoff .role { display: block; font-weight: 400; color: var(--color-navy-soft); font-size: 0.9rem; }

.part-group { margin: 2.75rem 0 1.25rem; }
.part-group-head { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.35rem; }
.part-number-badge {
  display: inline-flex; align-items: center; justify-content: center; min-width: 2.4em; height: 2.4em;
  background: var(--color-navy); color: #fff; border-radius: 999px; font-weight: 800; font-size: 0.95rem; padding: 0 0.5em;
}
.part-group-head h2 { margin: 0; }
.part-tagline { color: var(--color-navy-soft); font-size: 1rem; margin: 0.35rem 0 1.1rem; max-width: 50rem; }

.myth-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0.9rem; }
.myth-card {
  display: block; text-decoration: none; color: var(--color-navy); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 1rem 1.1rem; background: #fff; transition: border-color 0.15s, box-shadow 0.15s;
}
.myth-card:hover { border-color: var(--color-accent); box-shadow: 0 2px 10px rgba(11,31,58,0.07); }
.myth-card .myth-num { font-size: 0.78rem; font-weight: 800; color: var(--color-accent-dark); letter-spacing: 0.04em; }
.myth-card .myth-title { display: block; font-weight: 700; margin: 0.3rem 0 0.6rem; font-size: 1.02rem; line-height: 1.35; }

.verdict-badge {
  display: inline-flex; align-items: center; gap: 0.4em; font-weight: 800; font-size: 0.78rem;
  text-transform: uppercase; letter-spacing: 0.04em; padding: 0.35em 0.75em; border-radius: 999px;
  border: 1px solid transparent;
}
.verdict-badge svg { width: 14px; height: 14px; flex: none; }
.v-busted, .v-mostly-busted { background: var(--color-accent-tint); color: var(--color-accent-dark); border-color: #C7E6E3; }
.v-partial-truth { background: var(--color-amber-tint); color: var(--color-amber); border-color: var(--color-amber-border); }
.v-not-proven { background: var(--color-slate-tint); color: var(--color-slate); border-color: #D6DCE3; }
.v-emerging { background: var(--color-slate-tint); color: var(--color-slate); border-color: #D6DCE3; }

.callout {
  border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1.5rem 1.6rem; margin: 2.5rem 0;
  background: var(--color-bg-soft);
}
.callout h2, .callout h3 { margin-top: 0; }
.callout.callout-part10 { background: var(--color-slate-tint); border-color: #D6DCE3; }
.callout.callout-note { background: #fff; border-style: dashed; font-size: 0.95rem; color: var(--color-navy-soft); }
.pill-tag {
  display: inline-block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
  background: var(--color-navy); color: #fff; padding: 0.3em 0.7em; border-radius: 999px; margin-bottom: 0.75rem;
}

.article-hero { padding: 1.5rem 0 0.5rem; }
.myth-quote-title {
  font-family: var(--font-display); font-weight: 800; font-size: clamp(1.5rem, 1.2rem + 1.3vw, 2.1rem);
  color: var(--color-navy); margin: 0 0 1rem; line-height: 1.3;
}
.myth-quote-title::before { content: "\201C"; color: var(--color-accent); }
.myth-quote-title::after { content: "\201D"; color: var(--color-accent); }
.verdict-row { display: flex; align-items: center; gap: 0.85rem; margin: 1.1rem 0 2rem; flex-wrap: wrap; }
.verdict-row .verdict-badge { font-size: 0.85rem; padding: 0.5em 0.95em; }

.clinic-box {
  border-left: 4px solid var(--color-accent); background: var(--color-accent-tint); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.1rem 1.3rem; margin: 1.5rem 0; font-size: 1.05rem;
}
.clinic-box .label { display: block; font-weight: 800; text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.06em; color: var(--color-accent-dark); margin-bottom: 0.5rem; }

blockquote.patient-quote {
  margin: 1.5rem 0; padding: 1rem 1.3rem; border-left: 4px solid var(--color-navy); background: var(--color-bg-soft);
  font-style: italic; color: var(--color-navy-soft); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.pull-quote {
  margin: 2rem 0; padding: 1.4rem 1.5rem; background: var(--color-navy); color: #fff; border-radius: var(--radius);
  font-size: 1.15rem; font-weight: 600; line-height: 1.55;
}
.pull-quote .label { display: block; font-weight: 800; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.08em; color: #9FD9D6; margin-bottom: 0.6rem; }

.action-list { list-style: none; padding: 0; margin: 1.25rem 0; }
.action-list li { display: flex; gap: 0.7rem; padding: 0.55rem 0; border-bottom: 1px solid var(--color-border); align-items: flex-start; }
.action-list li:last-child { border-bottom: none; }
.action-list svg { flex: none; width: 20px; height: 20px; margin-top: 0.2em; color: var(--color-accent); }

.flag-box { border-radius: var(--radius); padding: 1.2rem 1.4rem; margin: 1.5rem 0; border: 1px solid; }
.flag-box h3 { margin: 0 0 0.7rem; display: flex; align-items: center; gap: 0.5em; font-size: 1.05rem; }
.flag-box svg { width: 20px; height: 20px; flex: none; }
.flag-box ul { list-style: none; padding: 0; margin: 0; }
.flag-box li { padding-left: 1.5em; position: relative; }
.flag-box li::before { content: "•"; position: absolute; left: 0.3em; font-weight: 900; }
.flag-yellow { background: var(--color-amber-tint); border-color: var(--color-amber-border); }
.flag-yellow h3 { color: var(--color-amber); }
.flag-red { background: var(--color-red-tint); border-color: var(--color-red-border); }
.flag-red h3 { color: var(--color-red); }

.ref-note { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--color-border); font-size: 0.9rem; color: var(--color-navy-soft); }
.ref-note .label { display: block; font-weight: 800; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.06em; color: var(--color-navy-soft); margin-bottom: 0.5rem; }
.ref-note ul { list-style: none; padding: 0; margin: 0; }
.ref-note li { margin-bottom: 0.5em; }

.myth-pager { display: flex; justify-content: space-between; gap: 1rem; margin: 3rem 0 1rem; flex-wrap: wrap; }
.pager-link {
  flex: 1 1 45%; text-decoration: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 0.9rem 1.05rem; color: var(--color-navy); min-width: 220px;
}
.pager-link:hover { border-color: var(--color-accent); }
.pager-link .dir { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-navy-soft); font-weight: 700; }
.pager-link .ttl { display: block; font-weight: 700; margin-top: 0.25rem; }
.pager-link.next { text-align: right; margin-left: auto; }
.back-index { display: inline-block; margin: 0.5rem 0 2rem; font-weight: 700; }

.ref-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.95rem; }
.ref-table th, .ref-table td { text-align: left; padding: 0.65rem 0.8rem; border-bottom: 1px solid var(--color-border); vertical-align: top; }
.ref-table th { color: var(--color-navy-soft); text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.05em; }

.def-list { border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; margin: 1.25rem 0; }
.def-row { display: flex; gap: 1rem; padding: 0.8rem 1.1rem; border-bottom: 1px solid var(--color-border); }
.def-row:last-child { border-bottom: none; }
.def-row:nth-child(odd) { background: var(--color-bg-soft); }
.def-term { font-weight: 800; min-width: 6.5rem; flex: none; color: var(--color-navy); }

.topic-block { margin: 2.25rem 0; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.topic-block h3 { margin-top: 0; }

.site-footer { border-top: 1px solid var(--color-border); margin-top: 3.5rem; padding: 2.25rem 0 3rem; background: var(--color-bg-soft); }
.disclaimer { font-size: 0.92rem; color: var(--color-navy-soft); max-width: 46rem; line-height: 1.6; }
.footer-meta { margin-top: 1.1rem; font-size: 0.88rem; color: var(--color-navy-soft); }
.footer-meta strong { color: var(--color-navy); }
.footer-links { margin-top: 1rem; font-size: 0.88rem; }
.footer-links a { color: var(--color-navy-soft); margin-right: 1rem; }

@media (min-width: 640px) {
  body { font-size: 1.15rem; }
}
@media (max-width: 480px) {
  .myth-grid { grid-template-columns: 1fr; }
  .credibility { flex-direction: column; align-items: flex-start; }
}

@media print {
  .site-header, .divider, .myth-pager, .back-index, .header-nav { display: none; }
  body { font-size: 12pt; color: #000; }
  .pull-quote { background: #fff !important; color: #000 !important; border: 1px solid #000; }
  a { color: #000; text-decoration: underline; }
  .site-footer { background: #fff; border-top: 1px solid #000; }
  .flag-box, .clinic-box, .callout { border: 1px solid #000 !important; background: #fff !important; }
}