:root {
  --bg-color: #f7f4ea;
  --text-color: #1f1f1f;
  --accent-color: #f2c300;
  --accent-dark: #2b2b2b;
  --card-bg: #ffffff;
  --max-width: 920px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans",
    "Noto Sans CJK SC",
    "Noto Sans CJK TC",
    "Noto Sans JP",
    "Noto Sans KR",
    "Microsoft YaHei",
    "Microsoft JhengHei",
    Arial,
    sans-serif;
  color: var(--text-color);
  background:
    radial-gradient(circle at top, rgba(242, 195, 0, 0.25), transparent 32rem),
    var(--bg-color);
  line-height: 1.6;
}

.site-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 20px 24px;
  text-align: center;
}

.logo-block {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 22px;
}

.site-logo {
  display: block;
  width: min(220px, 70vw);
  height: auto;
}

.logo-title-block {
  width: 100%;
  text-align: center;
}

.logo-title-block .site-logo {
  margin-left: auto;
  margin-right: auto;
}

.random-slogan,
.oval-button {
  display: inline-block;
  padding: 14px 22px;
  border: 2px solid var(--accent-dark);
  border-radius: 999px;
  background: var(--card-bg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  font-weight: 600;
  color: var(--accent-dark);
}

.random-slogan {
  max-width: 100%;
  font-size: clamp(1rem, 2.2vw, 1.35rem);
}

.oval-button {
  padding: 14px 24px;
  font-size: clamp(1rem, 2vw, 1.25rem);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.oval-button:hover,
.oval-button:focus {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.12);
}

.oval-button.active {
  background: var(--accent-color);
}

.page-content {
  max-width: var(--max-width);
  margin: 0 auto 60px;
  padding: 32px 24px 48px;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 28px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.08);
}

.page-content h1 {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.page-content p {
  margin: 0 0 18px;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.intro-section,
.slogan-section,
.menu-section,
.status-section,
.authors-section {
  text-align: center;
}

.characteristics-section,
.characteristics-section h2 {
  text-align: left;
}

.characteristics-list {
  margin-top: 0;
  padding-left: 1.4rem;
}

.characteristics-list li {
  margin-bottom: 0.7rem;
}

.oval-button-menu {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  .site-header {
    padding-top: 32px;
  }

  .random-slogan {
    border-radius: 20px;
  }

  .page-content {
    margin-left: 14px;
    margin-right: 14px;
    border-radius: 22px;
  }

  .oval-button-menu {
    gap: 10px;
  }

  .oval-button {
    width: 100%;
    max-width: 260px;
    border-radius: 20px;
  }


.logo-link {
  display: inline-block;
  text-decoration: none;
}

.logo-link img {
  display: block;
}

}

.oval-button-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.menu-break {
    flex-basis: 100%;
    height: 0;
}