:root {
  /* Palette derived from fundus photography — the amber retina, the dark macula,
     the clinical navy of ophthalmic instruments. Chosen for contrast, not mood. */
  --ink:        #10202F;
  --navy:       #163A5A;
  --navy-deep:  #0D2740;
  --navy-soft:  #3E6386;
  --amber:      #8F4E12;
  --amber-soft: #F0E2D2;
  --sage:       #2F5D4E;
  --sage-soft:  #DDE8E3;
  --paper:      #F5F3EE;
  --paper-2:    #EBE8E1;
  --white:      #FFFFFF;
  --rule:       #C9C4B9;
  --rule-soft:  #DEDAD1;
  --muted:      #4A5464;

  --font-display: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  --font-mono:    'IBM Plex Mono', 'SF Mono', Consolas, monospace;

  --measure: 64ch;
  --edge: clamp(1.25rem, 5vw, 4rem);
  --step: clamp(3.5rem, 7vw, 6rem);
}

/* Reader text-size control. The audience for this page has central vision loss;
   this is a functional control, not a gimmick. */
html { font-size: 19px; scroll-behavior: smooth; }
html.text-large  { font-size: 22px; }
html.text-xlarge { font-size: 26px; }

@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;
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--navy); text-decoration: underline; text-underline-offset: 0.18em; text-decoration-thickness: 1.5px; }
a:hover { color: var(--amber); }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy-deep);
  color: var(--white);
  padding: 1rem 1.5rem;
  z-index: 200;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

.wrap { max-width: 1180px; margin: 0 auto; padding-inline: var(--edge); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.012em;
  color: var(--navy-deep);
  margin: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--amber);
  font-weight: 500;
  margin-bottom: 1rem;
}

/* ─────────────────── Header ─────────────────── */

.site-header {
  background: var(--white);
  border-bottom: 2px solid var(--navy-deep);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.15rem;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy-deep);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.wordmark:hover { color: var(--navy-deep); }

.wordmark .mark {
  width: 26px; height: 26px;
  flex: none;
}

.header-nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.92rem;
  font-weight: 500;
  flex-wrap: wrap;
}
.header-nav a { color: var(--ink); text-decoration: none; }
.header-nav a:hover { color: var(--amber); text-decoration: underline; }

.text-size {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
}
.text-size span { font-family: var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.7rem; }
.text-size button {
  font-family: var(--font-body);
  background: var(--white);
  border: 1.5px solid var(--rule);
  color: var(--navy-deep);
  cursor: pointer;
  padding: 0.3rem 0.6rem;
  line-height: 1;
  border-radius: 3px;
  font-weight: 600;
}
.text-size button:hover { border-color: var(--navy); background: var(--paper-2); }
.text-size button[aria-pressed="true"] { background: var(--navy-deep); color: var(--white); border-color: var(--navy-deep); }
.text-size button.s1 { font-size: 0.82rem; }
.text-size button.s2 { font-size: 0.98rem; }
.text-size button.s3 { font-size: 1.14rem; }

@media (max-width: 860px) {
  .header-nav { order: 3; width: 100%; gap: 1.25rem; padding-top: 0.5rem; border-top: 1px solid var(--rule-soft); }
}

/* ─────────────────── Hero ─────────────────── */

.hero {
  background: var(--white);
  padding-block: var(--step);
  border-bottom: 1px solid var(--rule);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}

.hero h1 {
  font-size: clamp(2.1rem, 4.4vw, 3.4rem);
  margin-bottom: 1.5rem;
  max-width: 17ch;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 50ch;
  margin: 0 0 1.5rem;
}

.hero-lead strong { color: var(--ink); font-weight: 600; }

.hero-points {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: grid;
  gap: 0.85rem;
}

.hero-points li {
  display: grid;
  grid-template-columns: 1.6rem 1fr;
  gap: 0.75rem;
  align-items: start;
  font-size: 1rem;
}

.hero-points svg { width: 1.35rem; height: 1.35rem; margin-top: 0.22rem; flex: none; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  padding: 0.95rem 1.6rem;
  border-radius: 3px;
  border: 2px solid var(--navy-deep);
  background: var(--navy-deep);
  color: var(--white);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  min-height: 48px;
}
.btn:hover { background: var(--navy); border-color: var(--navy); color: var(--white); }

.btn-outline { background: transparent; color: var(--navy-deep); }
.btn-outline:hover { background: var(--navy-deep); color: var(--white); }

/* ── Signature: the Amsler grid ── */

.amsler-card {
  background: var(--paper);
  border: 2px solid var(--navy-deep);
  border-radius: 4px;
  overflow: hidden;
}

.amsler-head {
  background: var(--navy-deep);
  color: var(--white);
  padding: 0.9rem 1.25rem;
}
.amsler-head h2 {
  color: var(--white);
  font-size: 1.15rem;
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0;
}
.amsler-head p {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: #B9CBDC;
  letter-spacing: 0.04em;
}

.amsler-body { padding: 1.25rem; }

.amsler-figure {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 0.75rem;
  display: block;
}
.amsler-figure svg { width: 100%; height: auto; display: block; }

.amsler-steps {
  margin: 1.15rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: astep;
}
.amsler-steps li {
  counter-increment: astep;
  display: grid;
  grid-template-columns: 1.9rem 1fr;
  gap: 0.7rem;
  padding: 0.55rem 0;
  font-size: 0.94rem;
  border-bottom: 1px solid var(--rule-soft);
}
.amsler-steps li:last-child { border-bottom: none; }
.amsler-steps li::before {
  content: counter(astep);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--white);
  background: var(--navy-soft);
  width: 1.5rem; height: 1.5rem;
  display: grid; place-items: center;
  border-radius: 50%;
  margin-top: 0.15rem;
}

.amsler-alert {
  margin-top: 1.15rem;
  background: var(--amber-soft);
  border-left: 5px solid var(--amber);
  padding: 0.95rem 1.1rem;
  font-size: 0.94rem;
}
.amsler-alert strong { color: var(--amber); }

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; }
  .amsler-card { max-width: 520px; }
}

/* ─────────────────── Disclaimer band ─────────────────── */

.disclaimer-band {
  background: var(--navy-deep);
  color: #DDE6EE;
  padding-block: 2rem;
}
.disclaimer-band .inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  max-width: 96ch;
}
.disclaimer-band svg { width: 2rem; height: 2rem; flex: none; margin-top: 0.15rem; }
.disclaimer-band p { margin: 0; font-size: 0.98rem; line-height: 1.65; }
.disclaimer-band strong { color: var(--white); }
.disclaimer-band a { color: #A9C8E4; }

/* ─────────────────── Sections ─────────────────── */

section.band { padding-block: var(--step); border-bottom: 1px solid var(--rule); }
section.band.alt { background: var(--paper-2); }
section.band.white { background: var(--white); }

.section-head { max-width: var(--measure); margin-bottom: 2.75rem; }
.section-head h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); margin-bottom: 1rem; }
.section-head p { font-size: 1.08rem; color: var(--muted); margin: 0; }

/* Two types of AMD */

.types {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
}

.type-card {
  background: var(--white);
  border: 1px solid var(--rule);
  border-top: 6px solid var(--navy);
  padding: 2rem 1.75rem;
}
.type-card.wet { border-top-color: var(--amber); }

.type-share {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.65rem;
}

.type-card h3 { font-size: 1.5rem; margin-bottom: 0.85rem; }
.type-card p { margin: 0 0 1rem; font-size: 1rem; }
.type-card p:last-child { margin-bottom: 0; }
.type-card dl { margin: 1.25rem 0 0; padding-top: 1.25rem; border-top: 1px solid var(--rule-soft); }
.type-card dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}
.type-card dd { margin: 0 0 0.9rem; font-size: 0.96rem; }
.type-card dd:last-child { margin-bottom: 0; }

@media (max-width: 820px) { .types { grid-template-columns: 1fr; } }

/* Signs list */

.signs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
}

.sign {
  padding: 1.6rem 1.5rem 1.6rem 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 0.85rem;
  align-items: start;
}
.sign svg { width: 1.7rem; height: 1.7rem; margin-top: 0.15rem; }
.sign h3 { font-family: var(--font-body); font-size: 1.05rem; font-weight: 600; margin-bottom: 0.3rem; color: var(--ink); }
.sign p { margin: 0; font-size: 0.96rem; color: var(--muted); }

.urgent-note {
  margin-top: 2.5rem;
  background: var(--white);
  border: 2px solid var(--amber);
  padding: 1.6rem 1.75rem;
  max-width: 80ch;
}
.urgent-note h3 { font-size: 1.25rem; color: var(--amber); margin-bottom: 0.6rem; }
.urgent-note p { margin: 0; font-size: 1.02rem; }

/* Risk factors */

.risk-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.risk-list { list-style: none; padding: 0; margin: 0; }
.risk-list li {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: baseline;
}
.risk-list li:first-child { border-top: 1px solid var(--rule); }
.risk-name { font-weight: 600; font-size: 1.02rem; }
.risk-note { display: block; font-weight: 400; font-size: 0.92rem; color: var(--muted); margin-top: 0.15rem; }
.risk-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 2px;
  white-space: nowrap;
}
.risk-tag.changeable { background: var(--sage-soft); color: var(--sage); }
.risk-tag.fixed { background: var(--paper-2); color: var(--muted); border: 1px solid var(--rule); }

.risk-aside {
  background: var(--sage-soft);
  border-left: 5px solid var(--sage);
  padding: 1.75rem;
}
.risk-aside h3 { font-size: 1.3rem; color: var(--sage); margin-bottom: 0.85rem; }
.risk-aside p { margin: 0 0 0.9rem; font-size: 1rem; }
.risk-aside p:last-child { margin-bottom: 0; }

@media (max-width: 860px) { .risk-grid { grid-template-columns: 1fr; } }

/* Evidence */

.evidence-intro { max-width: var(--measure); margin-bottom: 2.5rem; }

.evidence-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border: 1px solid var(--rule);
  font-size: 0.98rem;
}
.evidence-table caption {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  padding-bottom: 0.75rem;
}
.evidence-table th, .evidence-table td {
  text-align: left;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.evidence-table thead th {
  background: var(--navy-deep);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}
.evidence-table tbody th { font-weight: 600; color: var(--ink); width: 34%; }
.evidence-table tbody tr:last-child th,
.evidence-table tbody tr:last-child td { border-bottom: none; }

.verdict {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.5rem;
  border-radius: 2px;
  display: inline-block;
  white-space: nowrap;
}
.verdict.yes { background: var(--sage-soft); color: var(--sage); }
.verdict.no  { background: var(--amber-soft); color: var(--amber); }

.evidence-caveat {
  margin-top: 2rem;
  padding: 1.6rem 1.75rem;
  background: var(--white);
  border: 1px solid var(--rule);
  border-left: 5px solid var(--navy);
  max-width: 82ch;
}
.evidence-caveat h3 { font-size: 1.2rem; margin-bottom: 0.7rem; }
.evidence-caveat p { margin: 0 0 0.85rem; font-size: 1rem; }
.evidence-caveat p:last-child { margin-bottom: 0; }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Questions checklist */

.questions {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  max-width: 90ch;
}
.questions ol { margin: 0; padding: 0; list-style: none; counter-reset: q; }
.questions li {
  counter-increment: q;
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.9rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 1.02rem;
}
.questions li:last-child { border-bottom: none; padding-bottom: 0; }
.questions li::before {
  content: counter(q, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--amber);
  font-weight: 500;
  padding-top: 0.22rem;
}
.print-note {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  font-size: 0.95rem;
  color: var(--muted);
}

/* Resources */

.resources { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; }
.resource {
  background: var(--white);
  border: 1px solid var(--rule);
  padding: 1.6rem;
}
.resource h3 { font-family: var(--font-body); font-size: 1.08rem; font-weight: 600; margin-bottom: 0.5rem; }
.resource p { margin: 0 0 0.9rem; font-size: 0.95rem; color: var(--muted); }
.resource a { font-weight: 600; font-size: 0.95rem; }

/* Newsletter */

.signup { background: var(--navy-deep); color: #DDE6EE; padding-block: var(--step); }
.signup-inner { max-width: 68ch; }
.signup h2 { color: var(--white); font-size: clamp(1.7rem, 3vw, 2.35rem); margin-bottom: 1rem; }
.signup > .wrap > .signup-inner > p { font-size: 1.06rem; margin: 0 0 1.75rem; }

.signup-form { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.signup-form label {
  flex: 1 1 260px;
  display: block;
}
.signup-form .label-text {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.4rem;
}
.signup-form input[type="email"] {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.9rem 1rem;
  border: 2px solid #52708C;
  background: var(--white);
  color: var(--ink);
  border-radius: 3px;
  min-height: 48px;
}
.signup-form input[type="email"]:focus { border-color: var(--amber); }
.signup-form .btn { background: var(--amber); border-color: var(--amber); align-self: flex-end; }
.signup-form .btn:hover { background: #7A420F; border-color: #7A420F; }

.consent {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 62ch;
}
.consent input[type="checkbox"] { width: 1.15rem; height: 1.15rem; margin-top: 0.28rem; accent-color: var(--amber); }
.consent a { color: #A9C8E4; }

.signup-fine { margin-top: 1.5rem; font-size: 0.88rem; color: #A6B7C7; }

/* ─────────────────── Footer ─────────────────── */

footer { background: var(--ink); color: #B9C2CD; padding-block: 3.25rem 2.5rem; }
.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid #2C3A4A;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 0.75rem;
  display: flex; align-items: center; gap: 0.55rem;
}
.footer-brand .mark { width: 24px; height: 24px; }
.footer-about { font-size: 0.94rem; max-width: 40ch; margin: 0; }

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #8FA6BC;
  font-weight: 500;
  margin-bottom: 1rem;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.65rem; font-size: 0.94rem; }
.footer-col a { color: #B9C2CD; text-decoration: none; }
.footer-col a:hover { color: var(--white); text-decoration: underline; }

.footer-bottom {
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: #8894A2;
}
.footer-bottom p { margin: 0; }

.footer-disclaimer {
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid #2C3A4A;
  font-size: 0.85rem;
  color: #8894A2;
  max-width: 100ch;
  line-height: 1.65;
}

@media (max-width: 820px) { .footer-top { grid-template-columns: 1fr 1fr; } .footer-brand-col { grid-column: 1 / -1; } }
@media (max-width: 520px) { .footer-top { grid-template-columns: 1fr; } }