/* =========================================
   Kuden OS - Design System
   Modern SaaS Dashboard for Desktop
   ========================================= */

/* --- CSS Variables --- */
:root {
  /* Colors - Clean & Professional */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-border: #bfdbfe;

  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;

  --color-text-primary: #111827;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;

  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;

  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Layout */
  --sidebar-width: 240px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- App Layout --- */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-bg-primary);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-logo {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.5px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md) var(--space-sm);
  overflow-y: auto;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-md);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.15s ease;
  margin-bottom: var(--space-xs);
}

.sidebar-item:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  text-decoration: none;
}

.sidebar-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.sidebar-item-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-bottom {
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-sm);
}

.sidebar-bottom .sidebar-item {
  flex: 1;
  justify-content: center;
  margin-bottom: 0;
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header --- */
.header {
  height: var(--header-height);
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-md);
}

.header-breadcrumb a {
  color: var(--color-text-secondary);
}

.header-breadcrumb span {
  color: var(--color-text-primary);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* --- Page Content --- */
.page-content {
  flex: 1;
  padding: var(--space-xl);
  max-width: 1400px;
}

/* --- Welcome Section --- */
.welcome-section {
  margin-bottom: var(--space-xl);
}

.welcome-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.welcome-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

/* --- Cards --- */
.card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.card-link {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
}

.card-body {
  padding: var(--space-lg);
}

/* --- Summary Cards --- */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.summary-card {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.summary-card-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.summary-card-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.summary-card-sub {
  font-size: var(--font-size-xs);
  margin-top: var(--space-xs);
}

.summary-card-sub.up {
  color: var(--color-success);
}

.summary-card-sub.down {
  color: var(--color-danger);
}

/* --- Grid Layouts --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 1200px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* --- List Items --- */
.list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  transition: background 0.15s ease;
}

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

.list-item:hover {
  background: var(--color-bg-secondary);
}

.list-item-content {
  flex: 1;
  min-width: 0;
}

.list-item-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.list-item-name {
  font-weight: 500;
  color: var(--color-text-primary);
}

.list-item-text {
  color: var(--color-text-primary);
  line-height: 1.5;
}

.list-item-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

/* --- Goal Cards --- */
.goal-card {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
  transition: background 0.15s ease;
}

.goal-card:hover {
  background: var(--color-bg-secondary);
}

.goal-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.goal-card-category {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.goal-card-category.performance {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.goal-card-category.growth {
  background: var(--color-success-light);
  color: var(--color-success);
}

.goal-card-title {
  font-size: var(--font-size-md);
  font-weight: 500;
  color: var(--color-text-primary);
}

/* --- Progress Bar --- */
.progress-bar {
  height: 6px;
  background: var(--color-bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.progress-fill.green {
  background: var(--color-success);
}

.progress-fill.yellow {
  background: var(--color-warning);
}

.progress-fill.red {
  background: var(--color-danger);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  white-space: nowrap;
}

.badge-blue {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge-green {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-yellow {
  background: var(--color-warning-light);
  color: #92400e;
}

.badge-red {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge-gray {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  text-decoration: none;
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
  text-decoration: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: 14px 24px;
  font-size: var(--font-size-lg);
}

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-family: inherit;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.filter-select {
  padding: 8px 32px 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: inherit;
  background: var(--color-bg-primary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E") no-repeat right 12px center;
  appearance: none;
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: var(--space-xs);
  padding: var(--space-xs);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  width: fit-content;
}

.tab {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab:hover {
  color: var(--color-text-primary);
}

.tab.active {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* --- Floating Button --- */
.floating-btn {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  padding: 14px 24px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50px;
  font-size: var(--font-size-md);
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all 0.2s ease;
  z-index: 200;
}

.floating-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 20px -4px rgba(37, 99, 235, 0.4);
}

/* --- Alert Box --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.alert-danger {
  background: var(--color-danger-light);
  border: 1px solid #fecaca;
}

.alert-warning {
  background: var(--color-warning-light);
  border: 1px solid #fde68a;
}

.alert-info {
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
}

.alert-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.alert-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Mindmap --- */
.mindmap-area {
  position: relative;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.mindmap-node {
  position: absolute;
  background: var(--color-bg-primary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.mindmap-node:hover {
  box-shadow: var(--shadow-md);
  transform: scale(1.05);
}

.mindmap-node.center {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  font-size: var(--font-size-md);
  font-weight: 600;
}

/* --- Back to Index --- */
.back-to-index {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  z-index: 300;
  box-shadow: var(--shadow-sm);
}

.back-to-index:hover {
  background: var(--color-bg-secondary);
  text-decoration: none;
}

/* --- Checkbox Circle --- */
.checkbox-circle {
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.checkbox-circle.warning {
  border-color: var(--color-warning);
}

.checkbox-circle.primary {
  border-color: var(--color-primary);
}

.checkbox-circle.danger {
  border-color: var(--color-danger);
}

.checkbox-circle.done {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
  font-size: 12px;
}

/* --- Status Indicator --- */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.active {
  background: var(--color-success);
}

.status-dot.pending {
  background: var(--color-warning);
}

.status-dot.inactive {
  background: var(--color-text-tertiary);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.empty-state-text {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-lg);
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.pagination-info {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Priority Indicator --- */
.priority-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.priority-star {
  font-size: 18px;
}

.priority-star.high {
  color: var(--color-warning);
}

.priority-star.medium {
  color: var(--color-text-tertiary);
}

.priority-label {
  font-size: var(--font-size-xs);
}

/* --- Action Footer --- */
.action-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
}

/* --- Info Box --- */
.info-box {
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.info-box-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.info-box-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.info-box-title {
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.info-box-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- Stat Display --- */
.stat-display {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
}

.stat-value {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.stat-unit {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
}

.stat-change {
  font-size: var(--font-size-md);
  margin-top: var(--space-sm);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-danger);
}

/* --- Quick Links --- */
.quick-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* --- Legend --- */
.legend {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* --- Utility Classes --- */
.text-muted {
  color: var(--color-text-secondary);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-danger {
  color: var(--color-danger);
}

.text-strikethrough {
  text-decoration: line-through;
  color: var(--color-text-tertiary);
}

.opacity-60 {
  opacity: 0.6;
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.flex { display: flex; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }

.w-full { width: 100%; }
.text-center { text-align: center; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }

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

.animate-fadeIn {
  animation: fadeIn 0.3s ease;
}