:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --bg-body: #0f172a;
  --bg-card: #1e293b;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --accent-blue: #38bdf8;
  --accent-green: #4ade80;
  --accent-yellow: #fbbf24;
  --accent-red: #f87171;
  --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
aside {
  width: 280px;
  background: rgba(30, 41, 59, 0.7);
  backdrop-filter: blur(12px);
  border-right: 1px solid var(--border);
  padding: 2rem 1.5rem;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 10;
}

.logo {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  background: linear-gradient(to right, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-list {
  list-style: none;
}

.nav-header {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem 1rem;
}

.nav-item {
  margin-bottom: 0.25rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  transition: all 0.2s;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-link.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Main Content */
main {
  margin-left: 280px;
  flex-grow: 1;
  padding: 3rem 4rem;
  max-width: 1200px;
}

header {
  margin-bottom: 3rem;
}

h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.025em;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

section {
  margin-bottom: 4rem;
  animation: fadeIn 0.6s ease-out forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  margin: 2rem 0 1rem;
  color: var(--accent-blue);
}

p {
  margin-bottom: 1rem;
}

ul, ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Cards and Tables */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  margin-bottom: 2rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 1rem 0;
}

th {
  background: rgba(15, 23, 42, 0.5);
  text-align: left;
  padding: 1rem;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}

td {
  padding: 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

tr:last-child td {
  border-bottom: none;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.status-red {
  background: rgba(248, 113, 113, 0.1);
  color: var(--accent-red);
  border: 1px solid rgba(248, 113, 113, 0.2);
}

.status-green {
  background: rgba(74, 222, 128, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(74, 222, 128, 0.2);
}

.status-yellow {
  background: rgba(251, 191, 36, 0.1);
  color: var(--accent-yellow);
  border: 1px solid rgba(251, 191, 36, 0.2);
}

/* Mermaid Container */
.mermaid-container {
  background: #fff;
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

blockquote {
  border-left: 4px solid var(--primary);
  padding: 1rem 1.5rem;
  background: rgba(79, 70, 229, 0.05);
  border-radius: 0 0.5rem 0.5rem 0;
  margin: 1rem 0 2rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Utils */
.mb-4 { margin-bottom: 1rem; }
.text-accent-blue { color: var(--accent-blue); }
.text-accent-green { color: var(--accent-green); }
.text-accent-yellow { color: var(--accent-yellow); }
.text-accent-red { color: var(--accent-red); }

/* Print Style Optimization */
@media print {
  aside { display: none; }
  main {
    margin-left: 0;
    padding: 0;
    width: 100%;
    color: #000;
    background: #fff;
  }
  body { background: #fff; color: #000; }
  .card {
    border: none;
    box-shadow: none;
    background: #fff;
    padding: 0;
    page-break-inside: avoid;
  }
  h2 { border-color: #000; color: #000; }
  th { border-bottom: 2px solid #000; color: #000; background: #eee; }
  td { border-bottom: 1px solid #ddd; color: #000; background: #fff; }
  .mermaid-container {
    page-break-inside: avoid;
    border: 1px solid #eee;
    margin: 2rem 0;
  }
}

/* Mobile Responsive */
@media (max-width: 900px) {
  aside { width: 0; display: none; }
  main { margin-left: 0; padding: 2rem; }
}