.register-page {
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(237, 244, 242, 0.92), rgba(246, 248, 247, 0.98) 42%),
    #f6f8f7;
}

.register-header {
  position: sticky;
  z-index: 10;
  top: 14px;
  width: min(1120px, calc(100% - 28px));
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 14px auto 0;
  padding: 10px 12px 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 32px rgba(21, 35, 33, 0.12);
  backdrop-filter: blur(18px);
}

.register-back {
  min-height: 42px;
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}

.register-main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 64px 0 92px;
}

.register-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 42px;
  align-items: center;
}

.register-copy h1 {
  margin: 0;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.register-copy p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.register-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.register-scope-note {
  display: grid;
  gap: 4px;
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(13, 118, 110, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.register-scope-note strong {
  color: var(--primary-dark);
  font-size: 14px;
}

.register-proof span,
.setup-badge {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 900;
}

.register-visual {
  margin: 0;
}

.register-visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  box-shadow: var(--shadow);
}

.register-grid {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  margin-top: 52px;
}

.setup-card,
.register-form {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 10px 28px rgba(21, 35, 33, 0.08);
}

.setup-card {
  position: sticky;
  top: 96px;
  padding: 24px;
}

.setup-card h2,
.form-section-title h2,
.account-result h2 {
  margin: 12px 0 0;
  font-size: 24px;
  line-height: 1.32;
}

.setup-card ol {
  display: grid;
  gap: 18px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: setup;
}

.setup-card li {
  display: grid;
  gap: 6px;
  padding-left: 38px;
  position: relative;
}

.setup-card li::before {
  counter-increment: setup;
  content: counter(setup, decimal-leading-zero);
  position: absolute;
  top: 0;
  left: 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 950;
}

.setup-card strong {
  font-size: 15px;
}

.setup-card span {
  color: var(--muted);
  line-height: 1.7;
}

.register-form {
  display: grid;
  gap: 16px;
  padding: 24px;
}

.register-form label {
  display: grid;
  gap: 7px;
  color: #33423f;
  font-size: 13px;
  font-weight: 850;
}

.field-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.field-tag {
  min-height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 900;
  line-height: 1.2;
}

.field-tag.required {
  background: #fff0eb;
  color: #a74325;
}

.field-tag.optional {
  background: var(--surface-soft);
  color: var(--primary-dark);
}

.field-hint {
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
}

.register-form input,
.register-form select,
.register-form textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font-size: 16px;
  padding: 12px;
  outline: none;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.register-form textarea {
  min-height: 108px;
  resize: vertical;
}

.register-form input:focus,
.register-form select:focus,
.register-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13, 118, 110, 0.16);
}

.register-form .field-error {
  border-color: var(--danger);
}

.register-form .consent {
  grid-template-columns: 18px 1fr;
  align-items: start;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.6;
}

.register-form .consent input {
  width: 18px;
  height: 18px;
  min-height: 0;
  margin-top: 2px;
  padding: 0;
}

.optional-details {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8faf9;
}

.optional-details summary {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.optional-details summary::-webkit-details-marker {
  display: none;
}

.optional-details summary > span {
  display: grid;
  gap: 3px;
}

.optional-details summary strong {
  font-size: 14px;
}

.optional-details summary small {
  color: var(--muted);
  font-size: 11px;
}

.optional-details summary::after {
  content: "+";
  width: 28px;
  height: 28px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff;
  color: var(--primary-dark);
  font-size: 20px;
  font-weight: 700;
}

.optional-details[open] summary::after {
  content: "−";
}

.optional-fields {
  display: grid;
  gap: 16px;
  padding: 16px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.submit-assurance {
  display: grid;
  gap: 3px;
  margin: 0;
  padding: 11px 14px;
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
  text-align: center;
}

.submit-assurance strong {
  color: var(--primary-dark);
}

.pricing-bridge {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
  text-align: center;
}

.pricing-bridge a {
  color: var(--primary-dark);
  font-weight: 850;
}

.form-section-title span,
.account-result > span {
  color: var(--accent);
  font-size: 12px;
  font-weight: 950;
  text-transform: uppercase;
}

.register-submit {
  width: 100%;
  min-height: 54px;
}

.account-result {
  display: grid;
  gap: 16px;
  margin-top: 4px;
  padding: 22px;
  border: 1px solid rgba(13, 118, 110, 0.26);
  border-radius: var(--radius);
  background: #eff8f6;
}

.account-result[hidden] {
  display: none;
}

.account-result dl {
  display: grid;
  gap: 1px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.account-result dl div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px;
  padding: 14px;
  background: #fff;
}

.account-result dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
}

.account-result dd {
  margin: 0;
  color: var(--ink);
  font-weight: 900;
  overflow-wrap: anywhere;
}

.account-result p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.account-login-link {
  width: 100%;
  min-height: 50px;
}

/* 一般的なノートPC高でも、説明だけで画面を使い切らず入力開始位置を見せる。 */
@media (min-width: 921px) and (max-height: 800px) {
  .register-main {
    padding-top: 20px;
  }

  .register-grid {
    margin-top: 16px;
  }

  .register-form {
    gap: 14px;
    padding-top: 18px;
  }
}

@media (max-width: 920px) {
  .register-main {
    padding-top: 48px;
  }

  .register-hero,
  .register-grid {
    grid-template-columns: 1fr;
  }

  .setup-card {
    position: static;
    order: 2;
  }

  .register-form {
    order: 1;
  }
}

@media (max-width: 620px) {
  .register-header {
    top: 10px;
    width: min(100% - 20px, 720px);
  }

  .register-header .brand small {
    white-space: normal;
  }

  .register-back {
    display: none;
  }

  .register-main {
    width: min(100% - 28px, 1120px);
    padding: 42px 0 68px;
  }

  .register-visual {
    display: none;
  }

  .register-grid {
    margin-top: 28px;
  }

  .register-proof {
    margin-top: 20px;
  }

  .register-copy h1 {
    font-size: clamp(36px, 10.5vw, 48px);
  }

  .register-copy p {
    font-size: 16px;
  }

  .register-form,
  .setup-card {
    padding: 18px;
  }

  .account-result dl div {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}