/* hcvbaseline.com — one-page study site */

:root {
  --bg: #f6f7f5;
  --surface: #ffffff;
  --ink: #1a1f1c;
  --muted: #4a554e;
  --line: #d5ddd6;
  --accent: #1f4d3a;
  --accent-hover: #163829;
  --accent-soft: #e8f0eb;
  --max: 40rem;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(26, 31, 28, 0.06), 0 8px 24px rgba(26, 31, 28, 0.06);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
}

img {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-hover);
}

.wrap {
  width: min(100% - 2rem, 52rem);
  margin-inline: auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 1rem 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.01em;
  color: var(--accent);
  text-decoration: none;
}

.brand-tag {
  font-size: 0.9rem;
  color: var(--muted);
}

.hero {
  padding: 2.5rem 0 1.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 4vw, 2.15rem);
  line-height: 1.2;
  max-width: 18ch;
}

.lede {
  margin: 0;
  max-width: var(--max);
  color: var(--muted);
  font-size: 1.08rem;
}

.grid {
  display: grid;
  gap: 1rem;
  padding-bottom: 2rem;
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }

  .grid .span-2 {
    grid-column: 1 / -1;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 0.65rem;
  font-size: 1.15rem;
  color: var(--accent);
}

.card p,
.card li {
  color: var(--ink);
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.card ul {
  margin: 0.4rem 0 0;
  padding-left: 1.15rem;
}

.card li {
  margin: 0.35rem 0;
}

.card li::marker {
  color: var(--accent);
}

.cta {
  background: var(--accent-soft);
  border-color: #c5d9cc;
}

.cta p {
  margin-top: 0;
  color: var(--muted);
}

.btn {
  display: inline-block;
  margin-top: 0.85rem;
  padding: 0.75rem 1.2rem;
  background: var(--accent);
  color: #fff !important;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--accent-hover);
}

.btn:focus-visible {
  outline: 3px solid #8eb9a3;
  outline-offset: 2px;
}

.note {
  font-size: 0.95rem;
  color: var(--muted);
}

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.contact-list li {
  margin: 0.4rem 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0.35rem 0;
  max-width: var(--max);
}

/* ——— Survey form ——— */

a.brand-name:hover {
  color: var(--accent-hover);
}

.survey-hero .lede {
  margin-bottom: 0.75rem;
}

.survey-form {
  display: grid;
  gap: 1rem;
  padding-bottom: 2.5rem;
  max-width: 40rem;
}

.survey-block {
  margin: 0;
  min-width: 0;
}

.survey-block > legend {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  padding: 0 0.25rem;
  margin-bottom: 0.5rem;
}

.field {
  margin: 1rem 0 0;
}

.field:first-of-type {
  margin-top: 0.5rem;
}

.field label,
.choice-legend {
  display: block;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--ink);
}

.help {
  margin: 0.2rem 0 0.45rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.req {
  color: #8b3a3a;
  font-weight: 700;
}

.followup-mark {
  display: none;
}

.followup-required .followup-mark {
  display: inline;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field select,
.field textarea {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.65rem 0.75rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.field textarea {
  resize: vertical;
  min-height: 6rem;
}

.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible {
  outline: 3px solid #8eb9a3;
  outline-offset: 1px;
  border-color: var(--accent);
}

.choice-group {
  margin: 1.15rem 0 0;
  padding: 0;
  border: none;
  min-width: 0;
}

.choice-group > .choice-legend {
  margin-bottom: 0.45rem;
  padding: 0;
}

.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  margin: 0.4rem 0;
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 400;
}

.choice:hover {
  background: var(--accent-soft);
}

.choice input {
  margin-top: 0.25rem;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.choice input:focus-visible {
  outline: 3px solid #8eb9a3;
  outline-offset: 2px;
}

.other-field {
  margin-left: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--bg);
  border-radius: 8px;
  border: 1px dashed var(--line);
}

.survey-submit {
  background: var(--accent-soft);
  border-color: #c5d9cc;
}

.survey-submit .btn {
  margin-top: 0.5rem;
  font: inherit;
}

.survey-submit .btn:focus-visible {
  outline: 3px solid #8eb9a3;
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .survey-form {
    max-width: none;
  }

  .choice {
    padding-inline: 0.35rem;
  }
}