:root {
  --bg: #f4f7f8;
  --bg-accent: #eef4f3;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-soft: #f8fafb;
  --text: #111827;
  --muted: #667085;
  --line: #e5e7eb;
  --primary: #0f766e;
  --primary-strong: #115e59;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --font-body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-display: "Manrope", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.06), transparent 26%),
    linear-gradient(180deg, #fafcfc 0%, #f3f6f7 100%);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.page-shell,
.info-page {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 36px;
}

.hero {
  max-width: 840px;
  margin: 0 auto 18px;
  text-align: center;
}

.eyebrow,
.section-label,
.topic-kicker {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--primary);
  font-size: 0.78rem;
}

.hero h1,
.page-head h1 {
  margin: 12px 0 0;
  font-size: clamp(1.7rem, 3vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.05em;
  font-weight: 900;
}

.hero h1 {
  white-space: nowrap;
  text-align: center;
}

.hero-copy,
.page-head p {
  margin: 16px 0 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.9;
  line-break: strict;
  text-wrap: pretty;
}

.hero-copy {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.hero-copy span {
  display: block;
  text-align: center;
}

.hero-copy span + span {
  margin-top: 0.28em;
}

.layout {
  display: grid;
  max-width: 800px;
  margin: 0 auto;
  gap: 18px;
}

.panel,
.content-card {
  background: var(--surface);
  border: 1px solid rgba(229, 231, 235, 0.95);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.panel-main,
.content-card {
  padding: 22px;
}

.panel-main {
  display: flex;
  flex-direction: column;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.panel h2,
.content-card h2 {
  margin: 4px 0 0;
  font-size: 1.32rem;
  line-height: 1.35;
}

.section-label {
  color: var(--primary);
  font-size: 0.72rem;
}

.panel-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.7;
  line-break: strict;
  text-wrap: pretty;
}

.category-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 16px 0 14px;
}

.category-tab {
  flex: 1 1 0;
  min-width: 0;
  min-height: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.category-tab:hover,
.category-tab:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(15, 118, 110, 0.35);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
  outline: none;
}

.category-tab[aria-pressed="true"] {
  border-color: rgba(15, 118, 110, 0.42);
  background: #f5fbfa;
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.06);
}

.tab-title {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
}

.tab-meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.45;
}

.topic-card {
  position: relative;
  display: grid;
  grid-template-rows: auto minmax(7.75rem, 1fr) auto;
  align-items: start;
  text-align: center;
  padding: 22px;
  min-height: 286px;
  border-radius: 20px;
  background: var(--surface-soft);
  border: 1px solid #e8edf0;
  overflow: hidden;
}

.topic-kicker {
  color: var(--primary);
  font-size: 0.68rem;
}

.topic-text {
  width: 100%;
  align-self: center;
  margin: 12px 0 8px;
  font-size: clamp(1.3rem, 2.5vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.05em;
  transition:
    transform 180ms ease,
    opacity 180ms ease,
    filter 180ms ease;
}

.topic-text[data-layout="single"] {
  max-width: none;
  white-space: nowrap;
  overflow: hidden;
}

.topic-text[data-layout="wrap"] {
  max-width: 100%;
  white-space: normal;
  overflow: visible;
  line-break: strict;
  text-wrap: balance;
}

.topic-hint,
.content-card p,
.content-card li,
.info-list dd,
.site-footer {
  color: var(--muted);
  line-height: 1.8;
}

.topic-hint {
  margin: 0;
  min-height: 3em;
  font-size: 0.9rem;
  transition: opacity 140ms ease;
}

.panel-footer {
  display: flex;
  margin-top: 12px;
}

.panel-footer .spin-button {
  margin-left: auto;
  margin-right: auto;
}

.spin-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 0;
  border: none;
  border-radius: 999px;
  min-width: 144px;
  padding: 12px 18px;
  font-family: var(--font-display);
  font-size: 0.84rem;
  font-weight: 800;
  color: #ffffff;
  background: var(--primary);
  cursor: pointer;
  transition:
    background-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.18);
}

.spin-button:hover,
.spin-button:focus-visible {
  background: var(--primary-strong);
  transform: translateY(-1px);
  box-shadow: 0 16px 28px rgba(15, 118, 110, 0.2);
  outline: none;
}

.spin-button:disabled {
  opacity: 0.6;
  cursor: wait;
  transform: none;
  box-shadow: none;
}

.topic-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    rgba(255, 255, 255, 0) 20%,
    rgba(255, 255, 255, 0.55) 50%,
    rgba(255, 255, 255, 0) 80%
  );
  transform: translateX(-130%);
  opacity: 0;
  pointer-events: none;
}

.topic-card[data-state="spinning"]::after {
  opacity: 1;
  animation: topic-glint 1100ms linear infinite;
}

.topic-card[data-state="spinning"][data-phase="spin"] .topic-text {
  opacity: 0.56;
  filter: blur(0.2px);
  transform: translateY(4px) scale(0.992);
}

.topic-card[data-state="spinning"][data-phase="settle"] .topic-text {
  opacity: 1;
  filter: none;
  transform: translateY(0) scale(1.01);
}

.topic-card[data-state="spinning"] .topic-hint {
  opacity: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.category-tab:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
  box-shadow: none;
}

@keyframes topic-glint {
  from {
    transform: translateX(-130%);
  }

  to {
    transform: translateX(130%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .topic-text,
  .spin-button,
  .category-tab {
    transition: none;
  }

  .topic-card[data-state="spinning"]::after {
    animation: none;
    opacity: 0;
  }
}

.content-card p,
.content-card li,
.info-list dd {
  margin: 0;
}

.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
  padding: 8px 2px 0;
  font-size: 0.94rem;
}

.footer-nav,
.page-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.footer-nav a,
.page-nav a,
.text-link {
  color: var(--text);
  text-underline-offset: 0.22em;
}

.content-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

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

.info-list {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 10px 18px;
  margin: 0;
}

.info-list dt {
  color: var(--primary);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
}

.info-note {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: #f5fbfa;
  border: 1px solid rgba(15, 118, 110, 0.14);
  line-height: 1.8;
}

@media (max-width: 920px) {
  .panel-footer,
  .site-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .spin-button {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .page-shell,
  .info-page {
    width: min(100% - 20px, 1040px);
    padding-top: 20px;
  }

  .panel-main,
  .content-card,
  .content-card {
    padding: 20px;
  }

  .panel-header {
    flex-direction: column;
  }

  .hero h1 {
    white-space: normal;
  }

  .category-tabs {
    flex-direction: column;
  }

  .topic-card {
    grid-template-rows: auto minmax(7.2rem, 1fr) auto;
    min-height: 268px;
    padding: 18px;
  }

  .topic-text {
    font-size: clamp(1.2rem, 6.4vw, 1.8rem);
  }

  .info-list {
    grid-template-columns: 1fr;
  }
}