:root {
  --bg: #f3efe6;
  --paper: #fffdf8;
  --ink: #2b261f;
  --muted: #6d665b;
  --line: #d8d0c2;
  --accent: #2f4a3e;
  --accent-soft: #e6eee8;
  --warn: #8a3d2c;
  --radius: 10px;
}

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

html {
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    "Yu Gothic", sans-serif;
  line-height: 1.7;
}

.frame {
  width: min(40rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 8.5rem;
}

.masthead {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.product {
  margin: 0.15rem 0 0;
  font-size: 1.15rem;
  font-weight: 650;
}

.progress {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

h2 {
  margin: 0.2rem 0 0.6rem;
  font-size: 1.6rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.lead {
  margin: 0 0 1.4rem;
  color: var(--muted);
}

.thanks {
  color: var(--ink);
  font-size: 1.05rem;
}

.pledge {
  padding: 1.2rem 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.pledge h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
}

.pledge article + article {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.pledge h4 {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.pledge p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.authority {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.authority input {
  margin-top: 0.3rem;
  accent-color: var(--accent);
}

.field {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1.4rem;
}

.field span {
  font-weight: 600;
  font-size: 0.92rem;
}

.field input[type="text"],
.pain-other {
  width: 100%;
  padding: 0.7rem 0.8rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.field input[type="text"]:focus,
.pain-other:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

fieldset {
  margin: 0 0 1.4rem;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 0.55rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.choice {
  display: block;
  cursor: pointer;
}

.choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.choice span {
  display: block;
  padding: 0.55rem 0.85rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.92rem;
}

.choice input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.choice input:checked + span {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: var(--accent);
  font-weight: 600;
}

.pain {
  margin-bottom: 0.75rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.pain-toggle {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
}

.pain-toggle input {
  margin-top: 0.3rem;
  accent-color: var(--accent);
}

.pain.is-open {
  border-color: var(--accent);
}

.pain-detail {
  padding: 0 1.05rem 1.05rem;
  border-top: 1px solid var(--line);
}

.pain-detail fieldset {
  margin: 0.9rem 0 0;
}

.contact {
  margin-top: 1.6rem;
  color: var(--muted);
}

.actions {
  position: fixed;
  left: 50%;
  bottom: 0;
  width: min(40rem, calc(100% - 2rem));
  transform: translateX(-50%);
  padding: 0.85rem 0 1.15rem;
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.action-row {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}

.btn {
  min-width: 6.5rem;
  padding: 0.7rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn.primary {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.btn.ghost {
  color: var(--ink);
  background: var(--paper);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.error {
  margin: 0 0 0.55rem;
  color: var(--warn);
  font-size: 0.88rem;
}

.screen[hidden] {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}