:root {
  --main: #008080;
  --main-dark: #0f5f5f;
  --main-soft: #e8f6f5;
  --accent: #f7fbfb;
  --text: #24323d;
  --muted: #5b6b76;
  --bg: #f5f8f8;
  --card: rgba(255, 255, 255, 0.96);
  --border: #d7e2e2;
  --border-strong: #bdd0d0;
  --warning-bg: #fdf3dc;
  --warning-text: #8a5a00;
  --shadow: 0 14px 36px rgba(28, 53, 61, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--text);
  line-height: 1.7;
  background:
    radial-gradient(circle at top left, rgba(0, 128, 128, 0.08), transparent 22%),
    linear-gradient(180deg, #f8fbfb 0%, #eef4f4 100%);
}

a {
  color: inherit;
}

code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(215, 226, 226, 0.85);
}

.header-inner,
.container,
.site-footer {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
}

.site-title {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav a,
.site-footer a {
  color: var(--main-dark);
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-footer a:hover,
.site-footer a:focus-visible {
  text-decoration: underline;
}

.container {
  padding: 28px 0 56px;
}

.hero,
.category-nav-section,
.note-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero {
  padding: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
}

.hero-badge,
.category-pill,
.tool-tag,
.tool-status {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-badge {
  margin-bottom: 14px;
  padding: 7px 12px;
  background: var(--main-soft);
  color: var(--main-dark);
  font-size: 0.84rem;
}

.hero h1,
.section-heading h2,
.category-header h2,
.note-box h2 {
  margin: 0;
  line-height: 1.35;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 10px;
}

.hero p,
.section-heading p,
.category-header p,
.tool-card p,
.note-box p,
.site-footer p {
  margin: 0;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hero-button,
.tool-action {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 0.18s ease,
    background-color 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease,
    box-shadow 0.18s ease;
}

.hero-button.primary,
.tool-action {
  background: var(--main);
  color: #ffffff;
  box-shadow: 0 10px 18px rgba(0, 128, 128, 0.18);
}

.hero-button.secondary {
  background: #ffffff;
  color: var(--main-dark);
  border-color: var(--border);
}

.hero-button:hover,
.hero-button:focus-visible,
.tool-action:hover,
.tool-action:focus-visible {
  transform: translateY(-1px);
}

.category-nav-section {
  margin-top: 22px;
  padding: 24px;
}

.section-heading,
.category-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 6px;
  color: var(--main-dark);
  font-size: 0.85rem;
  font-weight: 800;
}

.category-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.category-pill {
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--main-dark);
  text-decoration: none;
  transition:
    background-color 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease,
    transform 0.18s ease;
}

.category-pill:hover,
.category-pill:focus-visible {
  transform: translateY(-1px);
  border-color: var(--border-strong);
}

.category-pill.is-active {
  background: var(--main);
  border-color: var(--main);
  color: #ffffff;
}

.category-list {
  margin-top: 26px;
  display: grid;
  gap: 22px;
}

.tools-feedback {
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #ffffff;
  color: var(--text);
}

.tools-feedback.is-warning {
  background: var(--warning-bg);
  border-color: #f0d7a2;
  color: var(--warning-text);
}

.tools-feedback.is-error {
  background: #fdeceb;
  border-color: #efc0bb;
  color: #9b3026;
}

.category-section {
  scroll-margin-top: 94px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.category-header {
  margin-bottom: 18px;
}

.category-count {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--main-dark);
}

.category-empty {
  margin: 0;
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: 16px;
  color: var(--muted);
  background: #fbfdfd;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 100%;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: #ffffff;
  transition:
    transform 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.18s ease,
    opacity 0.18s ease;
}

.tool-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: 0 16px 32px rgba(28, 53, 61, 0.1);
}

.tool-card.is-soon {
  background: #fcfcfa;
  border-style: dashed;
  opacity: 0.9;
}

.tool-card.is-soon:hover {
  transform: none;
  box-shadow: none;
}

.tool-card h3 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.5;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-tag {
  min-height: 28px;
  padding: 0 10px;
  background: #f2f7f7;
  color: var(--main-dark);
  font-size: 0.77rem;
}

.tool-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-top: auto;
}

.tool-status {
  min-height: 30px;
  padding: 0 11px;
  background: var(--warning-bg);
  color: var(--warning-text);
  font-size: 0.78rem;
}

.tool-action.is-disabled {
  background: #edf2f2;
  color: #607176;
  border-color: var(--border);
  box-shadow: none;
  cursor: not-allowed;
  pointer-events: none;
}

.note-box {
  margin-top: 26px;
  padding: 22px 24px;
}

.note-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  margin-top: 14px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  color: var(--main-dark);
  font-weight: 800;
  text-decoration: none;
}

.note-link:hover,
.note-link:focus-visible {
  text-decoration: underline;
}

.site-footer {
  padding: 0 0 40px;
  text-align: center;
}

@media (max-width: 760px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .container {
    padding-top: 20px;
  }

  .hero,
  .category-section,
  .category-nav-section,
  .note-box {
    padding: 20px;
    border-radius: 20px;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .section-heading,
  .category-header,
  .tool-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 520px) {
  .header-inner,
  .container,
  .site-footer {
    width: min(100% - 20px, 1100px);
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-button,
  .tool-action,
  .category-pill {
    width: 100%;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }
}