:root {
  --bg: #f7f4ef;
  --surface: #ffffff;
  --surface-soft: #f0f6f4;
  --text: #1f2a2e;
  --muted: #657277;
  --line: #d9e0dc;
  --primary: #0f766e;
  --primary-dark: #0b5853;
  --accent: #ca8a04;
  --danger-soft: #fff7ed;
  --shadow: 0 18px 55px rgba(20, 39, 42, 0.14);
  font-family:
    "Segoe UI",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    Meiryo,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 48px);
  background: rgba(247, 244, 239, 0.9);
  border-bottom: 1px solid rgba(217, 224, 220, 0.8);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  background: var(--primary);
  border-radius: 8px;
  color: #ffffff;
  font-size: 0.82rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-nav a:hover {
  background: rgba(15, 118, 110, 0.08);
  color: var(--primary-dark);
}

.section-band {
  padding: clamp(32px, 5vw, 64px) clamp(18px, 5vw, 64px);
}

.hero {
  display: flex;
  align-items: center;
  min-height: 460px;
  padding-top: clamp(44px, 6vw, 88px);
  padding-bottom: clamp(44px, 6vw, 88px);
}

.hero-copy {
  max-width: 820px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 11em;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.8rem);
  line-height: 1.04;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 20px 0 0;
  color: #3c4a4f;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-link,
.secondary-link,
.primary-button,
.ghost-button,
.copy-button {
  min-height: 46px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 800;
  line-height: 1.2;
}

.primary-link,
.primary-button {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.24);
}

.primary-link:hover,
.primary-button:hover {
  background: var(--primary-dark);
}

.secondary-link,
.ghost-button {
  background: #ffffff;
  border-color: var(--line);
  color: var(--text);
}

.secondary-link:hover,
.ghost-button:hover {
  border-color: var(--primary);
}

.maker {
  background: #ffffff;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: 0;
}

.section-heading p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
}

.maker-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: 24px;
  align-items: start;
}

.maker-form,
.result-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 8px 30px rgba(31, 42, 46, 0.08);
}

.maker-form {
  display: grid;
  gap: 22px;
  padding: clamp(18px, 3vw, 28px);
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend,
label > span {
  display: block;
  margin-bottom: 8px;
  color: #263438;
  font-weight: 800;
}

.field-note {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.purpose-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.purpose-card {
  position: relative;
  min-height: 58px;
  margin: 0;
}

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

.purpose-card span {
  display: grid;
  min-height: 58px;
  place-items: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: #36464b;
  font-size: 0.94rem;
  font-weight: 800;
  text-align: center;
}

.purpose-card input:checked + span {
  border-color: var(--primary);
  background: var(--surface-soft);
  color: var(--primary-dark);
  box-shadow: inset 0 0 0 1px var(--primary);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 16px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
}

input,
select {
  height: 46px;
  padding: 0 12px;
}

textarea {
  min-height: 88px;
  resize: vertical;
  padding: 12px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(15, 118, 110, 0.16);
}

.purpose-card input:focus-visible + span,
.primary-link:focus-visible,
.secondary-link:focus-visible,
.primary-button:focus-visible,
.ghost-button:focus-visible,
.copy-button:focus-visible,
.site-nav a:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.45);
  outline-offset: 3px;
}

.wide-field {
  display: block;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.result-panel {
  position: sticky;
  top: 86px;
  display: grid;
  gap: 16px;
  padding: clamp(18px, 3vw, 28px);
}

.result-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
}

.result-header h2 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.35;
}

.result-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.copy-button {
  min-width: 86px;
  background: #1f2a2e;
  color: #ffffff;
  font-weight: 800;
}

.copy-button.copied {
  background: var(--primary);
}

.copy-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

#resultText {
  min-height: 360px;
  background: #f8faf9;
  font-size: 0.95rem;
}

.notice {
  border: 1px solid #fed7aa;
  border-radius: 8px;
  background: var(--danger-soft);
  padding: 16px;
}

.notice h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.notice ul {
  margin: 0;
  padding-left: 1.2em;
  color: #6d4b1f;
}

.info-section {
  padding: clamp(40px, 7vw, 84px) clamp(18px, 5vw, 64px);
}

.info-section.muted {
  background: var(--surface-soft);
}

.step-grid,
.mistake-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.mistake-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.step-grid article,
.mistake-list article,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 20px;
}

.step-grid span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  font-weight: 800;
}

.step-grid h3,
.mistake-list h3 {
  margin: 14px 0 6px;
}

.step-grid p,
.mistake-list p {
  margin: 0;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 10px;
  max-width: 900px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin: 12px 0 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 5vw, 64px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .maker-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .result-panel {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero-actions,
  .form-actions,
  .result-header,
  .site-footer {
    flex-direction: column;
  }

  .primary-link,
  .secondary-link,
  .primary-button,
  .ghost-button,
  .copy-button {
    width: 100%;
    text-align: center;
  }

  .form-actions .ghost-button {
    background: #ffffff;
    border-color: #cfd9d5;
    color: var(--muted);
    box-shadow: none;
  }

  .result-panel .copy-button {
    min-height: 52px;
    font-size: 1rem;
  }

  .purpose-grid,
  .form-grid,
  .step-grid,
  .mistake-list {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.4rem, 14vw, 4rem);
  }
}