:root {
  --color-page: #f5f7fb;
  --color-surface: #ffffff;
  --color-surface-subtle: #f8fafc;
  --color-ink: #15213b;
  --color-muted: #5d6b82;
  --color-border: #dce4ef;
  --color-brand: #123560;
  --color-brand-dark: #0a274a;
  --color-accent: #008a87;
  --color-accent-soft: #e4f5f3;
  --color-warning: #8a5700;
  --color-warning-soft: #fff4d9;
  --color-danger: #b42318;
  --color-danger-soft: #fff0ed;
  --shadow-panel: 0 12px 34px rgba(18, 53, 96, 0.08);
  --radius-panel: 18px;
  --radius-control: 10px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --content-width: 1180px;
  font-family: Inter, 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  color: var(--color-ink);
  background: var(--color-page);
}

* { box-sizing: border-box; }

html { background: var(--color-page); }

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-page);
  font-size: 16px;
  line-height: 1.6;
}

button, input { font: inherit; }

button { cursor: pointer; }

button:disabled { cursor: not-allowed; opacity: 0.56; }

:focus-visible {
  outline: 3px solid #0f9cba;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--color-brand-dark);
  color: #fff;
  transform: translateY(-160%);
  transition: transform 0.16s ease;
}

.skip-link:focus { transform: translateY(0); }

.app-shell { min-height: 100vh; }

.app-header {
  border-bottom: 1px solid rgba(220, 228, 239, 0.85);
  background: #fff;
}

.header-inner, .main-content, .footer-inner {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 9px;
  background: var(--color-brand);
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.06em;
}

.brand strong, .brand span span { display: block; }
.brand strong { font-size: 0.94rem; letter-spacing: 0.02em; line-height: 1.2; }
.brand span span { color: var(--color-muted); font-size: 0.74rem; line-height: 1.35; }

.session-actions { display: flex; align-items: center; gap: var(--space-3); }
.operator-label { color: var(--color-muted); font-size: 0.82rem; }

.text-button {
  padding: 0.42rem 0.55rem;
  border: 0;
  border-radius: 0.4rem;
  background: transparent;
  color: var(--color-brand);
  font-weight: 700;
  font-size: 0.84rem;
}

.text-button:not(:disabled):hover { background: #edf3fa; }

.main-content { padding-block: var(--space-5) var(--space-8); }

.mode-banner {
  margin-bottom: var(--space-4);
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: #eff4fa;
  color: #314965;
  font-size: 0.84rem;
}

.mode-banner[data-tone='success'] { border-color: #a6dfd5; background: var(--color-accent-soft); color: #075b59; }
.mode-banner[data-tone='warning'] { border-color: #f1d597; background: var(--color-warning-soft); color: var(--color-warning); }
.mode-banner[data-tone='error'] { border-color: #f0b4ae; background: var(--color-danger-soft); color: var(--color-danger); }

.lookup-section {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: var(--radius-panel);
  background: var(--color-brand);
  box-shadow: var(--shadow-panel);
  color: #fff;
}

.section-heading { max-width: 760px; }
.section-overline { margin: 0 0 var(--space-2); color: var(--color-accent); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.1em; }
.lookup-section .section-overline { color: #8ce0d8; }

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: var(--space-2); font-size: clamp(1.65rem, 4vw, 2.3rem); line-height: 1.3; letter-spacing: -0.025em; }
h2 { margin-bottom: 0; font-size: clamp(1.2rem, 2.5vw, 1.5rem); line-height: 1.4; letter-spacing: -0.015em; }
.section-heading > p:last-child { margin-bottom: 0; color: #d6e2f0; font-size: 0.94rem; }

.lookup-form { margin-top: var(--space-5); }
.lookup-form > label { display: block; margin-bottom: var(--space-2); font-size: 0.85rem; font-weight: 700; }
.lookup-controls { display: flex; max-width: 700px; gap: var(--space-2); }

.lookup-controls input {
  min-width: 0;
  flex: 1;
  padding: 0.78rem 0.9rem;
  border: 1px solid #b9c9da;
  border-radius: var(--radius-control);
  background: #fff;
  color: var(--color-ink);
}

.primary-button {
  flex: 0 0 auto;
  padding: 0.78rem 1.15rem;
  border: 1px solid #5ed2c6;
  border-radius: var(--radius-control);
  background: var(--color-accent);
  color: #fff;
  font-weight: 800;
}

.primary-button:not(:disabled):hover { background: #007573; }
.field-help { margin: var(--space-2) 0 0; color: #d6e2f0; font-size: 0.79rem; }
.feedback { min-height: 1.6em; margin: var(--space-3) 0 0; color: #d6e2f0; font-size: 0.85rem; }
.feedback[data-error='true'] { color: #ffd0cb; font-weight: 700; }

.empty-panel, .result-panel {
  margin-top: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-panel);
  background: var(--color-surface);
  box-shadow: var(--shadow-panel);
}

.empty-panel { padding: clamp(2rem, 6vw, 4rem) var(--space-5); text-align: center; }
.empty-icon { display: grid; width: 46px; height: 46px; margin: 0 auto var(--space-4); place-items: center; border-radius: 50%; background: var(--color-accent-soft); color: var(--color-accent); font-size: 1.7rem; font-weight: 700; }
.empty-panel p { max-width: 620px; margin: var(--space-2) auto 0; color: var(--color-muted); font-size: 0.9rem; }

.result-panel { overflow: hidden; }
.result-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); padding: var(--space-5); border-bottom: 1px solid var(--color-border); }
.result-header .section-overline { margin-bottom: var(--space-1); }
.result-meta { margin: var(--space-2) 0 0; color: var(--color-muted); font-size: 0.86rem; }
.result-lock { flex: 0 0 auto; padding: 0.3rem 0.55rem; border-radius: 999px; background: var(--color-accent-soft); color: #076c68; font-size: 0.76rem; font-weight: 800; }

.diagnostics { display: grid; gap: var(--space-3); padding: var(--space-4) var(--space-5) 0; }
.diagnostic { padding: 0.85rem 1rem; border: 1px solid var(--color-border); border-left: 4px solid #6c809b; border-radius: var(--radius-control); background: var(--color-surface-subtle); }
.diagnostic[data-tone='warning'] { border-color: #f1d597; border-left-color: #d98b00; background: var(--color-warning-soft); }
.diagnostic[data-tone='error'] { border-color: #f0b4ae; border-left-color: var(--color-danger); background: var(--color-danger-soft); }
.diagnostic[data-tone='success'] { border-color: #a6dfd5; border-left-color: var(--color-accent); background: var(--color-accent-soft); }
.diagnostic strong, .diagnostic span { display: block; }
.diagnostic strong { font-size: 0.88rem; }
.diagnostic span { margin-top: 0.12rem; color: var(--color-muted); font-size: 0.83rem; }

.record-sections { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); padding: var(--space-5); }
.record-section { border: 1px solid var(--color-border); border-radius: 14px; overflow: hidden; }
.record-section h3 { margin: 0; padding: 0.78rem 1rem; background: #f0f5fa; color: var(--color-brand-dark); font-size: 0.94rem; }
.field-list { margin: 0; }
.field-row { display: grid; grid-template-columns: minmax(7rem, 0.8fr) minmax(0, 1.2fr); gap: var(--space-3); padding: 0.72rem 1rem; border-top: 1px solid var(--color-border); }
.field-row dt { color: var(--color-muted); font-size: 0.79rem; }
.field-row dd { margin: 0; color: var(--color-ink); font-size: 0.88rem; font-weight: 650; overflow-wrap: anywhere; }
.field-row[data-tone='warning'] dd { color: var(--color-warning); }
.field-row[data-tone='error'] dd { color: var(--color-danger); }
.field-row[data-state='not_registered'] dd, .field-row[data-state='not_applicable'] dd { color: var(--color-muted); font-weight: 500; }

.request-receipt { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); padding: var(--space-4) var(--space-5); border-top: 1px solid var(--color-border); background: var(--color-surface-subtle); color: var(--color-muted); font-size: 0.76rem; }
.request-receipt span { overflow-wrap: anywhere; }

.app-footer { border-top: 1px solid var(--color-border); background: #fff; }
.footer-inner { padding-block: var(--space-5); color: var(--color-muted); font-size: 0.76rem; }
.footer-inner p { margin: 0; }
.footer-inner p + p { margin-top: var(--space-1); }

@media (max-width: 767px) {
  .header-inner, .main-content, .footer-inner { width: min(calc(100% - 1.25rem), var(--content-width)); }
  .header-inner { min-height: 64px; }
  .operator-label { display: none; }
  .main-content { padding-block: var(--space-3) var(--space-6); }
  .lookup-controls { flex-direction: column; }
  .primary-button { width: 100%; }
  .result-header { flex-direction: column; }
  .record-sections { grid-template-columns: 1fr; padding: var(--space-3); }
  .diagnostics { padding: var(--space-3) var(--space-3) 0; }
  .result-header { padding: var(--space-4) var(--space-3); }
  .request-receipt { padding: var(--space-3); }
}

@media (max-width: 389px) {
  .brand-mark { width: 30px; height: 30px; }
  .brand strong { font-size: 0.86rem; }
  .brand span span { font-size: 0.69rem; }
  .lookup-section { padding: var(--space-4); }
  .field-row { grid-template-columns: 1fr; gap: var(--space-1); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}