@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;700;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  color-scheme: light;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
  --surface: rgba(255, 255, 255, 0.8);
  --text: #0f172a; /* slate-900 */
  --muted: #475569; /* slate-600 */
  --line: rgba(15, 23, 42, 0.08);
  --accent: #0f766e; /* teal-700 */
  --accent-strong: #115e59; /* teal-800 */
  --accent-soft: rgba(15, 118, 110, 0.05);
  --gold: #d97706; /* amber-600 */
  --blue: #2563eb; /* blue-600 */
  --green: #16a34a; /* green-600 */
  --focus: #d97706;
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  font-family: 'Plus Jakarta Sans', 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.intro {
  max-width: 720px;
  margin-inline: auto;
  padding: 20px 0 30px;
  text-align: center;
}

.service-name,
.question-count,
.result-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.brand-row {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.6);
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03);
}

.brand-mark {
  display: grid;
  grid-template-columns: repeat(2, 8px);
  gap: 4px;
}

.brand-mark span {
  width: 8px;
  aspect-ratio: 1;
  border-radius: 999px;
}

.brand-mark span:nth-child(1) { background: var(--accent); }
.brand-mark span:nth-child(2) { background: var(--blue); }
.brand-mark span:nth-child(3) { background: var(--gold); }
.brand-mark span:nth-child(4) { background: var(--green); }

.brand-row .service-name {
  margin: 0;
  font-size: 0.9rem;
}

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

h1 {
  margin: 0 auto;
  font-size: clamp(2rem, 8vw, 3.2rem);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #0f172a;
}

.lead {
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 480px;
}

.diagnosis,
.result {
  max-width: 720px;
  margin-inline: auto;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--glass-shadow);
  transition: all 0.3s ease;
}

.step-markers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}

.step-marker {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.04);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-marker[data-active="true"] {
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(15, 118, 110, 0.2);
}

.progress {
  height: 6px;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.05);
  border-radius: 999px;
  margin-bottom: 24px;
}

.progress-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-strong) 100%);
  border-radius: 999px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.question-count {
  margin-top: 0;
}

.diagnosis h2,
.result h2 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.4;
  font-weight: 800;
  color: #0f172a;
}

.options {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.option,
.secondary {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.option {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  min-height: 72px;
  padding: 16px 20px;
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.01);
  transition: border-color 0.2s cubic-bezier(0.4, 0, 0.2, 1), 
              background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.option-label {
  font-weight: 700;
  font-size: 1.05rem;
  color: #1e293b;
}

.option-note {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.option:hover,
.option:focus-visible {
  border-color: var(--accent);
  background: var(--accent-soft);
  outline: none;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px -5px rgba(15, 118, 110, 0.1);
}

.option:active {
  transform: translateY(-1px) scale(0.98);
}

.result {
  margin-top: 20px;
  animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.noscript-note {
  max-width: 720px;
  margin: 0 auto 20px;
  padding: 14px 16px;
  border: 1px solid rgba(217, 119, 6, 0.2);
  border-radius: 8px;
  background: rgba(255, 251, 235, 0.88);
  color: #92400e;
  line-height: 1.6;
}

.content-band {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.2;
}

.section-head p {
  margin: 16px 0 0;
  max-width: 680px;
  color: var(--muted);
  line-height: 1.8;
}

.feature-grid,
.mode-grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.feature-item,
.mode-card,
.faq-item {
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 10px 24px -20px rgba(15, 23, 42, 0.35);
}

.feature-item,
.mode-card {
  padding: 18px;
}

.feature-item h3,
.mode-card h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.35;
}

.feature-item p,
.mode-card p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.faq-item {
  padding: 0;
  overflow: clip;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 20px;
  font-weight: 700;
}

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

.faq-item[open] summary {
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.faq-answer {
  margin: 0;
  padding: 16px 20px 20px;
  color: var(--muted);
  line-height: 1.75;
}

.site-footer {
  max-width: 720px;
  margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result p:not(.result-label) {
  margin: 16px 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 1.05rem;
}

.guide-link {
  display: inline-flex;
  margin-top: 16px;
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.guide-link:hover,
.guide-link:focus-visible {
  text-decoration: underline;
  outline: none;
}

.cta,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  margin-top: 24px;
  padding: 12px 24px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.cta {
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
}

.cta:hover,
.cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.35);
  outline: none;
}

.cta:active {
  transform: translateY(0) scale(0.98);
}

.secondary {
  justify-content: center;
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: 0 2px 4px rgba(15, 23, 42, 0.02);
}

.secondary:hover,
.secondary:focus-visible {
  background: #f8fafc;
  border-color: #cbd5e1;
  transform: translateY(-1px);
  outline: none;
}

.secondary:active {
  transform: translateY(0) scale(0.98);
}

.mode-link-card {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.2s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-link-card:hover,
.mode-link-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(15, 118, 110, 0.24);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 34px -24px rgba(15, 23, 42, 0.45);
  outline: none;
}

.mode-link-text {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 700;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.page-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.page-nav a:hover,
.page-nav a:focus-visible {
  border-color: rgba(15, 118, 110, 0.24);
  background: rgba(255, 255, 255, 0.92);
  outline: none;
}

.page-hero {
  max-width: 760px;
  padding: 30px;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  background: var(--glass-bg);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.page-hero p {
  margin: 16px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.mode-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.mode-tag {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
  font-size: 0.85rem;
  font-weight: 700;
}

.info-grid,
.related-grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.info-card,
.list-card {
  padding: 20px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 24px -20px rgba(15, 23, 42, 0.35);
}

.info-card h3,
.list-card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.info-card p,
.list-card p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.list-card ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.8;
}

.list-card li + li {
  margin-top: 8px;
}

.mode-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.mode-cta-row .cta,
.mode-cta-row .secondary {
  width: auto;
  margin-top: 0;
}

@media (min-width: 640px) {
  .app {
    padding-top: 60px;
  }

  .diagnosis,
  .result {
    padding: 40px;
  }

  .step-markers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .options:has(.option:nth-child(3):last-child) {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .mode-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-hero {
    padding: 40px;
  }
}