/* RECAS-0809 study form — "clinical document" design
   Warm paper ground, deep slate-teal ink, serif headings, ruled sections. */

:root {
  --paper: #faf7f2;
  --paper-raised: #ffffff;
  --ink: #1f3134;
  --ink-soft: #47605f;
  --ink-faint: #7d928f;
  --rule: #d8d2c6;
  --accent: #0e6f6a;
  --accent-deep: #0a4f4b;
  --accent-wash: #e7f1ef;
  --error: #a4381f;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", "Helvetica Neue", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(31,49,52,0.04) 1px, transparent 0);
  background-size: 22px 22px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

/* ---------- masthead ---------- */

.masthead { margin-bottom: 2.5rem; }
.masthead-rule {
  height: 6px;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent) 55%, transparent);
  margin-bottom: 1.5rem;
}
.masthead-kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
  margin: 0 0 0.6rem;
}
.masthead-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.25;
  margin: 0;
  text-wrap: balance;
}
.masthead-sub {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--ink-soft);
  margin: 0.75rem 0 0;
}

/* ---------- sections ---------- */

.section { margin: 2.25rem 0; }
.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
}
.section-num {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  white-space: nowrap;
}
.section-head h2 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0;
}
.section-note { color: var(--ink-soft); font-size: 0.92rem; margin: -0.75rem 0 1.25rem; }

.prose { color: var(--ink-soft); }

/* ---------- callout (PIS) ---------- */

.callout {
  background: var(--accent-wash);
  border-left: 4px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0 6px 6px 0;
  margin: 1.5rem 0;
}
.callout a { color: var(--accent-deep); font-weight: 600; }

/* ---------- form controls ---------- */

.field { margin: 1.4rem 0; }
.field > label, .field > .q {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.hint { font-weight: 400; color: var(--ink-faint); font-size: 0.9rem; display: block; }
.req { color: var(--error); }
.opt-tag {
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--ink-faint);
  border: 1px solid var(--rule); border-radius: 3px; padding: 0.05rem 0.4rem;
  vertical-align: 0.15em; margin-left: 0.35rem;
}

input[type="text"], input[type="email"], input[type="tel"], input[type="date"], textarea {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
}
textarea { min-height: 6.5rem; resize: vertical; }
input:focus, textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.choices { display: flex; flex-direction: column; gap: 0.15rem; }
.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 400;
}
.choice:hover { background: rgba(14, 111, 106, 0.06); }
.choice input {
  margin-top: 0.3rem;
  width: 1.05rem; height: 1.05rem;
  accent-color: var(--accent);
  flex: none;
}
.choice .other-inline {
  flex: 1;
  min-width: 10rem;
  font: inherit;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.45rem 0.65rem;
  margin: -0.2rem 0;
}
.choice .other-inline::placeholder { color: var(--ink-faint); }

/* ---------- consent declarations ---------- */

.decl {
  display: flex;
  gap: 0.85rem;
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin: 0.75rem 0;
  cursor: pointer;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.decl:has(input:checked) {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}
.decl input {
  width: 1.2rem; height: 1.2rem;
  margin-top: 0.2rem;
  accent-color: var(--accent);
  flex: none;
}
.decl p { margin: 0; font-size: 0.95rem; }

/* ---------- signature ---------- */

.sig-wrap {
  background: var(--paper-raised);
  border: 1px dashed var(--ink-faint);
  border-radius: 8px;
  position: relative;
  touch-action: none;
}
.sig-wrap canvas { display: block; width: 100%; height: 180px; border-radius: 8px; cursor: crosshair; }
.sig-baseline {
  position: absolute;
  left: 1.5rem; right: 1.5rem; bottom: 2.4rem;
  border-bottom: 1px solid var(--rule);
  pointer-events: none;
}
.sig-x {
  position: absolute;
  left: 1.5rem; bottom: 2.55rem;
  font-family: var(--serif);
  color: var(--ink-faint);
  pointer-events: none;
}
.sig-tools { display: flex; justify-content: space-between; align-items: center; margin-top: 0.4rem; }
.sig-hint { color: var(--ink-faint); font-size: 0.85rem; }
.btn-ghost {
  font: inherit; font-size: 0.85rem;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink-soft);
  padding: 0.25rem 0.75rem;
  cursor: pointer;
}
.btn-ghost:hover { border-color: var(--ink-soft); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 34rem) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- submit ---------- */

.submit-row { margin-top: 2.5rem; border-top: 1px solid var(--rule); padding-top: 1.5rem; }
.btn-primary {
  font: inherit;
  font-weight: 600;
  font-size: 1.05rem;
  background: var(--accent-deep);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 2.25rem;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}
.btn-primary:hover { background: var(--accent); transform: translateY(-1px); }
.form-error {
  display: none;
  color: var(--error);
  font-weight: 600;
  margin-top: 0.75rem;
}
.form-error.show { display: block; }

/* ---------- thanks ---------- */

.thanks-mark {
  font-family: var(--serif);
  font-size: 3rem;
  color: var(--accent);
  margin: 0;
}

/* ---------- colophon ---------- */

.colophon {
  margin-top: 4rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}
.colophon a { color: var(--accent-deep); }
.colophon-fine { color: var(--ink-faint); font-size: 0.8rem; }

/* ---------- admin ---------- */

.admin-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; background: var(--paper-raised); }
.admin-table th, .admin-table td { border: 1px solid var(--rule); padding: 0.4rem 0.6rem; text-align: left; vertical-align: top; }
.admin-table th { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.admin-scroll { overflow-x: auto; }
.admin-sig { height: 42px; background: #fff; border: 1px solid var(--rule); }
details.answers summary { cursor: pointer; color: var(--accent-deep); }
details.answers pre { white-space: pre-wrap; font-size: 0.78rem; margin: 0.4rem 0 0; }