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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --bg: #f5f6fa;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--gray-800);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== Login Screen ===== */
.login-screen {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.login-card {
  background: white;
  border-radius: 16px;
  padding: 48px 40px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo h1 {
  font-size: 24px;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.login-logo p {
  color: var(--gray-500);
  font-size: 13px;
}

/* ===== App Layout ===== */
.app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  background: var(--gray-900);
  color: white;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h1 {
  font-size: 16px;
  font-weight: 600;
}

.sidebar-header p {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 2px;
  border-radius: 8px;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
  position: relative;
}

.nav-item:hover {
  background: rgba(255,255,255,0.05);
  color: white;
}

.nav-item.active {
  background: var(--primary);
  color: white;
}

.nav-item .icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.nav-item .badge {
  background: var(--danger);
  color: white;
  border-radius: 10px;
  padding: 2px 6px;
  font-size: 10px;
  font-weight: 600;
  margin-left: auto;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
}

.user-role {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
}

.logout-btn {
  width: 100%;
  padding: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}

.logout-btn:hover {
  background: rgba(255,255,255,0.1);
}

/* ===== Main Content ===== */
.main {
  padding: 32px 40px;
  overflow-y: auto;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--gray-900);
}

.page-subtitle {
  color: var(--gray-500);
  font-size: 13px;
  margin-top: 4px;
}

.page {
  display: none;
}

.page.active {
  display: block;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  background: white;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ===== Buttons ===== */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--gray-50);
}

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

/* ===== Cards ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--gray-900);
}

/* ===== Tables ===== */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  text-align: left;
  padding: 10px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 12px;
  font-size: 13px;
  border-bottom: 1px solid var(--gray-100);
}

.table tr:hover {
  background: var(--gray-50);
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.badge-info { background: var(--primary-light); color: var(--primary-dark); }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-gray { background: var(--gray-100); color: var(--gray-700); }

/* ===== Status Colors ===== */
.status-pending_design { background: #fef3c7; color: #92400e; }
.status-pending_approval { background: #ddd6fe; color: #5b21b6; }
.status-active { background: #d1fae5; color: #065f46; }
.status-completed { background: var(--gray-100); color: var(--gray-700); }
.status-paused { background: #fee2e2; color: #991b1b; }

/* ===== Stats Grid (Dashboard) ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.stat-label {
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 8px;
  font-weight: 500;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--gray-900);
}

.stat-trend {
  font-size: 11px;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ===== Progress Bar ===== */
.progress-bar {
  height: 8px;
  background: var(--gray-100);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  border-radius: 4px;
  transition: width 0.3s;
}

/* ===== Project Card (Dashboard) ===== */
.project-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  background: white;
  cursor: pointer;
  transition: all 0.15s;
}

.project-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 8px;
}

.project-card-title {
  font-weight: 600;
  color: var(--gray-900);
  font-size: 14px;
}

.project-card-meta {
  display: flex;
  gap: 12px;
  font-size: 11px;
  color: var(--gray-500);
  margin-top: 8px;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal {
  background: white;
  border-radius: 12px;
  padding: 24px;
  max-width: 560px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--gray-500);
  cursor: pointer;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ===== Hierarchy Display ===== */
.hierarchy-tree {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.company-block {
  margin-bottom: 20px;
}

.company-block:last-child {
  margin-bottom: 0;
}

.company-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.company-code {
  font-size: 11px;
  color: var(--gray-500);
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 4px;
}

.business-units {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  padding-left: 16px;
}

.business-unit {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}

.business-unit-name {
  font-weight: 600;
  font-size: 13px;
  color: var(--gray-900);
  margin-bottom: 4px;
}

.business-unit-meta {
  font-size: 11px;
  color: var(--gray-500);
}

/* ===== Notification Toast ===== */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: white;
  border-left: 4px solid var(--success);
  padding: 14px 20px;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  animation: slideIn 0.3s;
}

.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-500);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 16px;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 13px;
}

/* ===== Loading ===== */
.loading {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Settings Tabs ===== */
.settings-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.settings-tab {
  padding: 12px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-500);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 6px;
}

.settings-tab:hover {
  color: var(--gray-900);
}

.settings-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.settings-tab-content {
  display: none;
}

.settings-tab-content.active {
  display: block;
}

/* ===== Sidebar Nav Layout ===== */
.sidebar-nav {
  display: flex;
  flex-direction: column;
}

/* ===== Utility ===== */
.text-muted { color: var(--gray-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }