:root {
  --color-primary: #0284CC;
  --color-accent: #C00000;
  --color-text: #0f172a;
  --color-muted: #4b5563;
  --color-surface: #ffffff;
  --color-border: #d6e2ee;
  --color-bg: #f6fbff;
  --radius: 14px;
  --shadow-soft: 0 16px 35px rgba(2, 132, 204, 0.12);
  --shadow-light: 0 10px 20px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Sans", "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(2, 132, 204, 0.08), transparent 35%),
              radial-gradient(circle at 80% 0%, rgba(192, 0, 0, 0.08), transparent 30%),
              var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #0369a1;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 0 0 40px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--color-border);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.brand img {
  width: 140px;
}

.site-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--color-text);
  border: 1px solid transparent;
}

.site-nav a:hover {
  border-color: var(--color-border);
  background: rgba(2, 132, 204, 0.08);
}

.page {
  padding: 32px 30px 64px;
}

.section {
  margin-top: 32px;
}

.section-head {
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 0 0 6px;
  font-size: 1.4rem;
}

.section-head p {
  margin: 0;
  color: var(--color-muted);
}

.hero {
  background: linear-gradient(120deg, rgba(2, 132, 204, 0.1), rgba(192, 0, 0, 0.06));
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-light);
}

.hero .eyebrow {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 6px;
  font-size: 0.8rem;
}

.hero h1 {
  margin: 0 0 6px;
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
}

.hero p {
  margin: 0 0 10px;
  color: var(--color-muted);
}

.hero-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 12px 24px rgba(2, 132, 204, 0.25);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-ghost {
  background: #fff;
  border-color: var(--color-border);
  color: var(--color-text);
}

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

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-light);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(2, 132, 204, 0.14);
  border-color: rgba(2, 132, 204, 0.25);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.card p {
  margin: 0 0 10px;
  color: var(--color-muted);
}

.card .cta {
  font-weight: 700;
  color: var(--color-primary);
}

.card .cta:hover {
  color: #0369a1;
}

.tool-panel {
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

form, .tool-body {
  margin: 0;
}

label {
  font-weight: 700;
  display: block;
  margin-bottom: 6px;
}

input[type="text"],
input[type="number"],
input[type="color"],
input[type="email"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 1rem;
  background: #fff;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  margin-right: 6px;
}

.inline-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.date-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.date-unit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.date-input {
  width: 110px;
}

.pill {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(2, 132, 204, 0.08);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9rem;
}

.note {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: #fff;
  padding: 24px 0;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.site-footer .foot-inner {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.site-footer .footer-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: inherit;
  text-decoration: none;
}

.site-footer .footer-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-light);
}

.stack {
  display: grid;
  gap: 12px;
}

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

.tag-list li {
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.04);
  font-weight: 600;
  color: var(--color-text);
}

pre, code {
  font-family: "SFMono-Regular", "Consolas", "Menlo", monospace;
}

.scroll-area {
  max-height: 420px;
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #f9fbff;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.input-compact {
  width: 110px;
}

@media (min-width: 641px) {
  .date-controls {
    flex-wrap: nowrap;
  }
}

@media (max-width: 640px) {
  .site-header .inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero {
    padding: 24px;
  }
  .page {
    padding: 24px 16px 48px;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
}