/* ============================================
   YAGURA Sales Manual - Design System
   Based on yagura-design-guide_20260224.md
   ============================================ */

:root {
  /* Yagura Brand Colors */
  --green: #0EA371;
  --light-green: #34D399;
  --black: #09090B;
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --light-gray: #D1D5DB;
  --dark-navy: #0F1C50;
  --gray-50: #808080;
  --border-gray: #F2F2F2;

  /* Semantic aliases */
  --primary: var(--green);
  --bg: var(--off-white);
  --card-bg: var(--white);
  --text: var(--black);
  --text-secondary: var(--dark-navy);
  --text-muted: var(--gray-50);
  --border: var(--light-gray);

  --sidebar-width: 280px;
}

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

body {
  font-family: '游ゴシック', 'Yu Gothic', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   Layout
   ============================================ */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ============================================
   Sidebar - Green→Black gradient (design guide 3.1)
   ============================================ */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(240deg, var(--green) 0%, var(--black) 100%);
  color: var(--white);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
}

.sidebar-header {
  padding: 28px 24px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
  font-family: '游ゴシック Light', 'Yu Gothic Light', sans-serif;
  font-size: 20px;
  font-weight: 300;
  letter-spacing: 3px;
  color: var(--white);
}

.sidebar-header img {
  height: 32px;
  display: block;
}

.sidebar-header .subtitle {
  font-size: 11px;
  color: rgba(255,255,255,0.45);
  margin-top: 6px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sidebar-nav {
  padding: 20px 0;
}

.nav-section {
  margin-bottom: 12px;
}

.nav-section-title {
  padding: 8px 24px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.45);
  font-weight: 600;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 11px 24px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 13.5px;
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  position: relative;
}

.nav-link:hover {
  background: rgba(255,255,255,0.06);
  color: var(--white);
  border-left-color: rgba(255,255,255,0.2);
}

.nav-link.active {
  background: rgba(14,163,113,0.15);
  color: var(--white);
  border-left-color: var(--green);
  font-weight: 500;
}

.nav-link .icon {
  margin-right: 12px;
  font-size: 15px;
  width: 20px;
  text-align: center;
  opacity: 0.85;
}

/* Collapsible nav groups */
.nav-toggle {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: all 0.2s;
  padding: 10px 24px;
  border-radius: 0;
}

.nav-toggle:hover {
  color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.04);
}

.toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: rgba(255,255,255,0.1);
  font-size: 10px;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.nav-toggle:hover .toggle-icon {
  background: rgba(255,255,255,0.18);
}

.nav-toggle.collapsed .toggle-icon {
  transform: rotate(-90deg);
  background: rgba(255,255,255,0.06);
}

.nav-group {
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.nav-group.collapsed {
  max-height: 0 !important;
}

.nav-sub-title {
  padding: 10px 24px 4px 36px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.25);
  font-weight: 600;
}

.nav-sub-title:first-child {
  padding-top: 6px;
}

.nav-group .nav-link {
  padding-left: 36px;
  font-size: 13px;
}

/* ============================================
   Main Content
   ============================================ */
.main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
}

/* ============================================
   Top Bar
   ============================================ */
.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.95);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 16px;
  width: 380px;
  max-width: 100%;
  transition: border-color 0.2s;
}

.search-box:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(14,163,113,0.1);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 13.5px;
  width: 100%;
  margin-left: 8px;
  color: var(--text);
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--gray-50);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text);
  padding: 4px;
}

/* ============================================
   Content Area
   ============================================ */
.content {
  padding: 40px;
  max-width: 1000px;
}

.content h2 {
  font-family: '游ゴシック Light', 'Yu Gothic Light', sans-serif;
  font-size: 28px;
  font-weight: 300;
  margin-bottom: 8px;
  color: var(--black);
  letter-spacing: 0.5px;
}

.content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 16px;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: 10px;
}

.content h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--green);
  border-radius: 2px;
  flex-shrink: 0;
}

.page-description {
  color: var(--gray-50);
  font-size: 14px;
  margin-bottom: 36px;
}

/* ============================================
   Stats Row
   ============================================ */
.stats-row {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.stat-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 28px;
  flex: 1;
  min-width: 140px;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--green), var(--light-green));
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--black);
  line-height: 1.2;
}

.stat-label {
  font-size: 12px;
  color: var(--gray-50);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

/* ============================================
   Cards Grid
   ============================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0;
  transition: all 0.25s ease;
  text-decoration: none;
  color: inherit;
  display: block;
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--green);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(9,9,11,0.08);
  transform: translateY(-3px);
  border-color: var(--green);
}

.card:hover::before {
  opacity: 1;
}

.card-body {
  padding: 24px;
}

.card-icon {
  font-size: 28px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(14,163,113,0.08);
  border-radius: 10px;
}

.card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--black);
}

.card p {
  font-size: 13px;
  color: var(--gray-50);
  line-height: 1.7;
}

.card .tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--black);
  color: var(--white);
  border-radius: 50px;
  font-size: 10px;
  font-weight: 500;
  margin-top: 14px;
  letter-spacing: 0.5px;
}

.card .tag.update {
  background: var(--green);
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-50);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--green);
  text-decoration: none;
  transition: opacity 0.2s;
}

.breadcrumb a:hover {
  opacity: 0.7;
}

/* ============================================
   Article Content
   ============================================ */
.article-content {
  background: var(--card-bg);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 48px;
  margin-top: 28px;
  position: relative;
}

.article-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--light-green));
  border-radius: 10px 10px 0 0;
}

.article-content h3 {
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  font-size: 17px;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-content h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--green);
  border-radius: 2px;
  flex-shrink: 0;
}

.article-content h3:first-child {
  margin-top: 0;
}

.article-content h4 {
  font-size: 15px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
  color: var(--dark-navy);
  padding-left: 12px;
  border-left: 3px solid var(--light-green);
}

.article-content p {
  margin-bottom: 16px;
  font-size: 14.5px;
  color: var(--dark-navy);
  line-height: 1.9;
}

.article-content ul, .article-content ol {
  margin: 12px 0 24px 20px;
}

.article-content li {
  margin-bottom: 10px;
  font-size: 14.5px;
  color: var(--dark-navy);
  line-height: 1.8;
}

.article-content li strong {
  color: var(--black);
}

/* Tables */
.article-content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 24px 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-content th {
  background: var(--black);
  color: var(--white);
  padding: 12px 18px;
  text-align: left;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.article-content td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-gray);
  font-size: 13.5px;
  color: var(--dark-navy);
}

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

.article-content tr:nth-child(even) td {
  background: var(--off-white);
}

.article-content tr:hover td {
  background: rgba(14,163,113,0.04);
}

/* Callouts */
.callout {
  padding: 18px 24px;
  border-radius: 8px;
  margin: 24px 0;
  font-size: 13.5px;
  line-height: 1.8;
  position: relative;
  padding-left: 52px;
}

.callout::before {
  position: absolute;
  left: 18px;
  top: 18px;
  font-size: 18px;
}

.callout.info {
  background: rgba(14,163,113,0.06);
  border: 1px solid rgba(14,163,113,0.2);
  color: var(--dark-navy);
}

.callout.info::before {
  content: 'i';
  font-weight: 700;
  font-style: italic;
  color: var(--green);
  font-family: Georgia, serif;
  font-size: 16px;
}

.callout.warning {
  background: #FFF8ED;
  border: 1px solid #F5D799;
  color: var(--dark-navy);
}

.callout.warning::before {
  content: '!';
  font-weight: 700;
  color: #D97706;
  font-size: 16px;
}

.callout.tip {
  background: rgba(52,211,153,0.08);
  border: 1px solid rgba(52,211,153,0.3);
  color: var(--dark-navy);
}

.callout.tip::before {
  content: '\2713';
  font-weight: 700;
  color: var(--light-green);
  font-size: 16px;
}

.callout code {
  background: rgba(9,9,11,0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  font-family: 'SF Mono', 'Consolas', monospace;
}

/* Inline code */
.article-content code {
  background: rgba(9,9,11,0.06);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SF Mono', 'Consolas', monospace;
  color: var(--green);
}

/* ============================================
   Updated Badge
   ============================================ */
.updated-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--gray-50);
  background: var(--bg);
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* ============================================
   Search Results
   ============================================ */
.search-results {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0 0 10px 10px;
  box-shadow: 0 8px 24px rgba(9,9,11,0.1);
  max-height: 400px;
  overflow-y: auto;
  z-index: 200;
}

.search-results.active {
  display: block;
}

.search-result-item {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-gray);
  cursor: pointer;
  text-decoration: none;
  display: block;
  color: inherit;
  transition: background 0.15s;
}

.search-result-item:hover {
  background: rgba(14,163,113,0.04);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item h5 {
  font-size: 14px;
  margin-bottom: 3px;
  color: var(--black);
}

.search-result-item p {
  font-size: 12px;
  color: var(--gray-50);
}

/* ============================================
   Footer / Copyright
   ============================================ */
.footer {
  padding: 24px 40px;
  font-size: 11px;
  color: var(--gray-50);
  border-top: 1px solid var(--border);
  margin-top: 60px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

  .menu-toggle {
    display: block;
  }

  .topbar {
    padding: 12px 20px;
  }

  .search-box {
    width: 200px;
  }

  .content {
    padding: 24px 20px;
  }

  .article-content {
    padding: 28px 20px;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .stats-row {
    gap: 10px;
  }

  .stat-item {
    padding: 16px 20px;
  }
}

/* ============================================
   Print styles
   ============================================ */
/* ============================================
   Images in article content
   ============================================ */
.article-content img {
  max-width: 100%;
  height: auto !important;
  width: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 16px 0 24px;
  display: block;
  object-fit: contain;
}

/* ============================================
   Print styles
   ============================================ */
@media print {
  .sidebar, .topbar, .search-box {
    display: none;
  }

  .main {
    margin-left: 0;
  }

  .article-content {
    border: none;
    padding: 0;
    box-shadow: none;
  }
}