/* ── Design tokens ── */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);

  --blue: #2563eb;
  --blue-light: #eff6ff;
  --blue-border: #bfdbfe;

  /* 色盲（D/P型）対応の teal 系。回診アプリ内のステータス green と同パレット */
  --green: #14b8a6; /* teal-500 */
  --green-light: #f0fdfa; /* teal-50 */
  --green-border: #5eead4; /* teal-300 */

  /* 全体（root）のニュートラルバッジ用 */
  --neutral: #475569; /* slate-600 */
  --neutral-light: #f1f5f9; /* slate-100 */
  --neutral-border: #cbd5e1; /* slate-300 */
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    'Hiragino Kaku Gothic ProN',
    'Noto Sans JP',
    'Yu Gothic',
    Meiryo,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  max-width: 960px;
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 28px;
  height: 28px;
  background: #475569; /* slate-600 — neutral, works alongside both blue and green tools */
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark svg {
  display: block;
}

.site-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}

nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 6px;
  transition:
    background 0.15s,
    color 0.15s;
}
.nav-link:hover,
.nav-link.active {
  background: var(--bg);
  color: var(--text);
}
.nav-link.active {
  font-weight: 600;
}

/* ── Main ── */
main {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 56px 24px 80px;
  flex: 1;
}

/* ── Hero ── */
.hero {
  margin-bottom: 56px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 20px;
}
.badge-blue {
  color: var(--blue);
  background: var(--blue-light);
}
.badge-green {
  color: var(--green);
  background: var(--green-light);
}
.badge-neutral {
  color: var(--neutral);
  background: var(--neutral-light);
}

.hero h1 {
  font-size: clamp(26px, 4.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 14px;
}
.hero p {
  font-size: 15px;
  color: var(--muted);
  max-width: 520px;
  line-height: 1.75;
}

/* ── Section label ── */
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

/* ── App grid ── */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(272px, 1fr));
  gap: 14px;
  margin-bottom: 56px;
}

.app-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  transition:
    box-shadow 0.18s,
    transform 0.18s,
    border-color 0.18s;
}
.app-card:hover {
  transform: translateY(-2px);
  border-color: var(--blue-border);
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.1),
    0 12px 32px rgba(37, 99, 235, 0.12);
}

.app-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.app-icon-blue {
  background: var(--blue);
}
.app-icon-green {
  background: var(--green);
}
.app-icon-image {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: block;
  flex-shrink: 0;
}

.app-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 5px;
}
.app-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
}
.tag-blue {
  color: var(--blue);
  background: var(--blue-light);
}
.tag-green {
  color: var(--green);
  background: var(--green-light);
}

.arrow {
  color: var(--muted);
  font-size: 17px;
  transition:
    color 0.15s,
    transform 0.15s;
}
.app-card:hover .arrow {
  color: var(--blue);
  transform: translateX(3px);
}

/* ── Category cards (top page) ── */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 56px;
}
.cat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition:
    box-shadow 0.18s,
    transform 0.18s,
    border-color 0.18s;
}
.cat-card:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.1),
    0 12px 32px rgba(0, 0, 0, 0.1);
}
.cat-card-blue:hover {
  border-color: var(--blue-border);
}
.cat-card-green:hover {
  border-color: var(--green-border);
}

.cat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cat-icon-blue {
  background: var(--blue);
}
.cat-icon-green {
  background: var(--green);
}

.cat-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.cat-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
}
.cat-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
}
.cat-action-blue {
  color: var(--blue);
}
.cat-action-green {
  color: var(--green);
}

/* ── Notice ── */
.notice {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.notice-title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}
.notice ul {
  padding-left: 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.9;
}

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 20px 24px;
}
.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--muted);
}
.footer-inner a {
  color: inherit;
}

@media (max-width: 600px) {
  main {
    padding: 40px 16px 60px;
  }
  .hero {
    margin-bottom: 40px;
  }
  nav .nav-link span {
    display: none;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}