:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-text: #1f2937;
  --color-text-muted: #5b6472;
  --color-border: #e2e6ea;
  --color-primary: #2454ff;
  --color-primary-dark: #1a3fd6;
  --color-accent: #0f9d78;
  --font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --radius: 10px;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  line-height: 1.4;
  font-weight: 700;
}

/* ---------- Card page (index.html) ---------- */

.card-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: linear-gradient(180deg, #f0f4ff 0%, #ffffff 100%);
}

.card {
  width: 100%;
  max-width: 360px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 40px 28px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.avatar {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 700;
}

.card-name {
  margin: 0 0 28px;
  font-size: 1.3rem;
}

.btn-block {
  display: block;
  width: 100%;
  margin-bottom: 12px;
}

.services-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.services-link:hover {
  color: var(--color-primary);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  font-size: 1.05rem;
}

.site-header nav {
  display: flex;
  gap: 24px;
}

.site-header nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  white-space: nowrap;
}

.site-header nav a:hover {
  color: var(--color-primary);
}

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0 72px;
  background: linear-gradient(180deg, #f0f4ff 0%, #ffffff 100%);
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  margin: 0 0 24px;
}

.hero-lead {
  max-width: 640px;
  margin: 0 auto 32px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  transition: background 0.15s ease;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  transition: background 0.15s ease;
}

.btn-outline:hover {
  background: #eef2ff;
}

/* ---------- Sections ---------- */

.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-size: 1.5rem;
  text-align: center;
  margin: 0 0 12px;
}

.section-lead {
  text-align: center;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 40px;
}

/* ---------- Recommend list ---------- */

.recommend-list {
  list-style: none;
  margin: 40px auto 0;
  padding: 0;
  max-width: 760px;
  display: grid;
  gap: 16px;
}

.recommend-list li {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.tag {
  flex-shrink: 0;
  background: #e8edff;
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- Skill list ---------- */

.skill-list {
  list-style: none;
  margin: 40px auto 0;
  padding: 0;
  max-width: 760px;
  display: grid;
  gap: 12px;
}

.skill-list li {
  position: relative;
  padding-left: 28px;
  color: var(--color-text);
}

.skill-list li::before {
  content: "●";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.7rem;
  top: 0.55em;
}

/* ---------- Tool grid ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-card h3 {
  font-size: 1.05rem;
  margin: 0;
}

.tool-target {
  color: var(--color-primary-dark);
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0;
}

.tool-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin: 0;
}

.tool-price {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-top: 8px;
}

.tool-more {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  max-width: 640px;
  margin: 32px auto 0;
}

/* ---------- Contact ---------- */

.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */

.site-footer {
  background: #17202e;
  color: #c4ccd8;
  padding: 56px 0 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer-block h3 {
  color: #fff;
  font-size: 1rem;
  margin: 0 0 12px;
}

.footer-block p {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: #a7b0bd;
}

.copyright {
  text-align: center;
  font-size: 0.8rem;
  color: #6b7280;
  margin: 0;
  border-top: 1px solid #2a3444;
  padding-top: 20px;
}

/* ---------- Responsive ---------- */

@media (max-width: 640px) {
  .header-inner {
    height: auto;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
  }

  .site-header nav {
    gap: 8px 14px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .site-header nav a {
    font-size: 0.8rem;
  }

  .hero {
    padding: 64px 0 48px;
  }

  .section {
    padding: 48px 0;
  }
}