:root {
  --bg-start: #eef2f6;
  --bg-end: #dbe4ed;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-border: rgba(45, 62, 80, 0.12);
  --text-primary: #1f2d3d;
  --text-secondary: #5a6a7a;
  --brand: #0f5a96;
  --brand-strong: #0b4776;
  --shadow: 0 14px 30px rgba(19, 33, 46, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Noto Sans JP", "Yu Gothic UI", sans-serif;
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
  display: flex;
  flex-direction: column;
}

.background-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 45, 61, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 45, 61, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 25%, transparent 75%);
  z-index: -1;
}

.container {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 48px 20px 24px;
  flex: 1;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

h1 {
  margin: 8px 0 10px;
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
}

.lead {
  margin: 0;
  color: var(--text-secondary);
}

.apps-section {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

h2 {
  margin: 0;
  font-size: 1.1rem;
}

.app-count {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.app-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.app-button {
  display: block;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  border-radius: 12px;
  padding: 14px 16px;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.app-button:hover,
.app-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(15, 90, 150, 0.28);
  filter: saturate(1.08);
}

.app-description {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  opacity: 0.9;
  font-weight: 500;
}

.footer {
  text-align: center;
  padding: 14px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

@media (max-width: 600px) {
  .container {
    padding-top: 30px;
  }

  .apps-section {
    padding: 16px;
    border-radius: 12px;
  }
}