:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  color: #252a31;
  background: #f5f6f8;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  line-height: 1.9;
  font-weight: 400;
  --ink-muted: #5a626d;
  --line: #d9dee5;
  --accent: #235a84;
  --accent-strong: #174267;
  --error: #a32828;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: clamp(1rem, 5vw, 3.75rem) 1rem;
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid #e19a26;
  outline-offset: 3px;
}

.page-shell {
  width: min(100%, 760px);
  margin: 0 auto;
}

.notice-card,
.form-card {
  padding: clamp(1.25rem, 5vw, 2.5rem);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  box-shadow: 0 8px 28px rgb(23 43 62 / 6%);
}

.notice-card h1 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 1.75rem);
  line-height: 1.45;
  letter-spacing: 0.015em;
}

.notice-card h1 del {
  color: var(--ink-muted);
  text-decoration-thickness: 2px;
  text-decoration-color: #9b3d3d;
}

.contact-shortcut {
  margin: 1.25rem 0 2rem;
  padding: 0.9rem 1rem;
  background: #edf4f8;
  border-left: 4px solid var(--accent);
  font-weight: 700;
}

.notice-card h2 {
  margin: 2rem 0 0.25rem;
  font-size: 1.35rem;
  line-height: 1.55;
}

.notice-card h3 {
  margin: 1.9rem 0 0.35rem;
  font-size: 1.1rem;
}

.notice-card p {
  margin: 0.85rem 0;
}

.notice-card .date {
  margin: 0.2rem 0 1.5rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.notice-card hr {
  margin: 2.25rem 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.notice-signature {
  text-align: right;
}

.form-card {
  margin-top: 1.5rem;
  scroll-margin-top: 1.5rem;
}

.form-card h2 {
  margin: 0;
  font-size: 1.5rem;
}

.form-intro {
  margin: 0.5rem 0 1.5rem;
  color: var(--ink-muted);
}

.form-field {
  min-width: 0;
  margin: 1.25rem 0;
}

.form-field > label,
.choice-group legend,
.conditional-fields legend {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 700;
}

.required-label {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0 0.4rem;
  border-radius: 0.25rem;
  color: #8e2222;
  background: #fff0f0;
  font-size: 0.75rem;
  font-weight: 700;
  vertical-align: 0.08em;
}

input[type="text"],
input[type="email"],
textarea {
  display: block;
  width: 100%;
  min-height: 2.9rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid #aeb7c2;
  border-radius: 0.35rem;
  color: inherit;
  background: #fff;
  font: inherit;
  line-height: 1.5;
}

textarea {
  min-height: 9rem;
  resize: vertical;
}

input:hover,
textarea:hover {
  border-color: #737f8b;
}

.choice-group,
.conditional-fields {
  min-width: 0;
  margin: 1.5rem 0;
  padding: 0;
  border: 0;
}

.choice-option {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin: 0.75rem 0;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  cursor: pointer;
}

.choice-option:has(input:checked) {
  border-color: var(--accent);
  background: #f2f7fa;
}

.choice-option input {
  flex: 0 0 auto;
  margin-top: 0.45rem;
  accent-color: var(--accent);
}

.conditional-fields {
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: #fbfcfd;
}

.conditional-fields[hidden] {
  display: none;
}

.field-hint,
.character-count {
  display: block;
  color: var(--ink-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.hint-list {
  margin: 0.45rem 0 0;
  padding-left: 1.25rem;
}

.hint-list li + li {
  margin-top: 0.25rem;
}

.character-count {
  margin-top: 0.2rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.field-error {
  display: block;
  min-height: 1.2em;
  color: var(--error);
  font-size: 0.875rem;
}

.privacy-note {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem;
  border-radius: 0.35rem;
  background: #f4f6f8;
  color: #424a53;
  font-size: 0.9rem;
  line-height: 1.75;
}

.turnstile-section {
  min-height: 4rem;
}

.form-actions {
  margin-top: 1.25rem;
}

button[type="submit"] {
  min-width: 10rem;
  min-height: 3rem;
  padding: 0.6rem 1.5rem;
  border: 0;
  border-radius: 0.4rem;
  color: #fff;
  background: var(--accent);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button[type="submit"]:hover:not(:disabled) {
  background: var(--accent-strong);
}

button[type="submit"]:disabled {
  opacity: 0.65;
  cursor: wait;
}

.form-status {
  min-height: 1.5em;
  margin-bottom: 0;
  font-weight: 700;
}

.form-status[data-kind="success"] {
  color: #17613c;
}

.form-status[data-kind="error"] {
  color: var(--error);
}

@media (max-width: 520px) {
  body {
    padding: 0.75rem;
  }

  .notice-card,
  .form-card {
    border-radius: 0.5rem;
  }

  .contact-shortcut {
    margin-bottom: 1.5rem;
  }
}