/* ===== リセット & ベース ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #1a56db;
  --primary-dark: #1e429f;
  --success: #0e9f6e;
  --danger: #e02424;
  --warning: #d97706;
  --bg: #f9fafb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --text: #111827;
  --text-muted: #6b7280;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== レイアウト ===== */
.app-layout { display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: var(--primary);
  color: #fff;
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.topbar h1 { font-size: 18px; font-weight: 700; }
.topbar .user-info { font-size: 13px; display: flex; align-items: center; gap: 12px; }
.topbar .user-info span { opacity: .85; }

.main-container { display: flex; flex: 1; }

.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
}
.sidebar-section { margin-bottom: 8px; }
.sidebar-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: 8px 16px 4px;
}
.sidebar a, .sidebar button {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 16px;
  color: var(--text);
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  transition: background .15s;
  border-radius: 0;
}
.sidebar a:hover, .sidebar button:hover { background: var(--bg); }
.sidebar a.active { background: #eff6ff; color: var(--primary); font-weight: 600; }

.content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  max-height: calc(100vh - 56px);
}

/* ===== ページ ===== */
.page { display: none; }
.page.active { display: block; }

/* ===== カード ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.card-header h2 { font-size: 16px; font-weight: 600; }

/* ===== ボタン ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all .15s;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: .9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; }
.btn-outline { background: #fff; color: var(--text); border-color: var(--border); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ===== フォーム ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 4px; }
.form-control {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color .15s;
  background: #fff;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,.1); }
.form-row { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* ===== テーブル ===== */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  background: var(--bg);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tbody tr:hover { background: #f8faff; }
tbody tr:last-child td { border-bottom: none; }

/* ===== バッジ ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-in_progress { background: #dbeafe; color: #1e40af; }
.badge-completed { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }

/* ===== ログイン画面 ===== */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 100%);
}
.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.login-card h1 { font-size: 22px; font-weight: 700; margin-bottom: 8px; text-align: center; }
.login-card p { color: var(--text-muted); font-size: 13px; text-align: center; margin-bottom: 28px; }

/* ===== アラート ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 16px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fcd34d; }
.alert-info { background: #dbeafe; color: #1e40af; border: 1px solid #93c5fd; }

/* ===== 在庫照合テーブル ===== */
.reconcile-table th, .reconcile-table td { text-align: center; }
.reconcile-table .product-col { text-align: left; }
.discrepancy-row { background: #fff5f5 !important; }
.discrepancy-row td { color: #991b1b; }

/* ===== ファイルアップロード ===== */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: var(--bg);
}
.upload-area:hover, .upload-area.drag-over {
  border-color: var(--primary);
  background: #eff6ff;
}
.upload-area .icon { font-size: 36px; margin-bottom: 8px; }
.upload-area p { color: var(--text-muted); font-size: 13px; }

/* ===== 統計カード ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ===== プレビューパネル（PDF/Excel解析結果） ===== */
.preview-panel {
  background: #f8faff;
  border: 1px solid #c3d9ff;
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
}
.preview-panel h4 { font-size: 14px; font-weight: 600; margin-bottom: 12px; color: var(--primary); }

/* ===== スピナー ===== */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== ハンバーガーメニュー ===== */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 199;
}

/* ===== レスポンシブ ===== */
@media (max-width: 768px) {
  .hamburger-btn { display: block; }
  .sidebar {
    display: block;
    position: fixed;
    top: 0;
    left: -240px;
    width: 240px;
    height: 100vh;
    z-index: 200;
    transition: left .25s ease;
    box-shadow: 2px 0 12px rgba(0,0,0,.2);
  }
  .sidebar.open { left: 0; }
  .sidebar-overlay.open { display: block; }
  .content { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}