/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Sarabun:wght@300;400;500;600;700&display=swap');

/* Color Variables */
:root {
  /* Light Mode Variables */
  --bg-color: #f4f6fa;
  --card-bg: rgba(255, 255, 255, 0.9);
  --header-bg: rgba(255, 255, 255, 0.8);
  --text-color: #1e293b;
  --text-secondary: #64748b;
  
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: rgba(37, 99, 235, 0.1);
  
  --success-color: #10b981;
  --success-hover: #059669;
  --success-light: rgba(16, 185, 129, 0.1);
  
  --warning-color: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-light: rgba(239, 68, 68, 0.1);
  
  --border-color: rgba(226, 232, 240, 0.8);
  --shadow: 0 4px 20px -2px rgba(148, 163, 184, 0.12), 0 2px 8px -1px rgba(148, 163, 184, 0.08);
  --dropzone-bg: #f8fafc;
  --dropzone-border: #cbd5e1;
  
  --font-family: 'Inter', 'Sarabun', sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  /* Dark Mode Variables */
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --header-bg: rgba(15, 23, 42, 0.8);
  --text-color: #f8fafc;
  --text-secondary: #94a3b8;
  
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.15);
  
  --success-color: #10b981;
  --success-hover: #34d399;
  --success-light: rgba(16, 185, 129, 0.15);
  
  --warning-color: #fbbf24;
  --warning-light: rgba(251, 191, 36, 0.15);
  
  --danger-color: #f87171;
  --danger-hover: #fca5a5;
  --danger-light: rgba(248, 113, 113, 0.15);
  
  --border-color: rgba(51, 65, 85, 0.5);
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.2);
  --dropzone-bg: rgba(30, 41, 59, 0.4);
  --dropzone-border: #475569;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  transition: var(--transition);
  min-height: 100vh;
  padding-bottom: 2rem;
}

/* Header Section */
header {
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-container {
  background: linear-gradient(135deg, var(--primary-color), var(--success-color));
  color: white;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--text-color), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle Button */
.theme-btn {
  background: var(--primary-light);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-btn:hover {
  transform: rotate(15deg) scale(1.05);
  background: var(--primary-color);
  color: white;
}

/* Container & Layout */
.main-container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* KPI Dashboard Row */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.kpi-card {
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kpi-info h3 {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.kpi-info .kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-color);
  line-height: 1.2;
}

.kpi-info .kpi-subtext {
  font-size: 0.75rem;
  color: var(--success-color);
  margin-top: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.kpi-info .kpi-subtext.neutral {
  color: var(--text-secondary);
}

.kpi-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary-color);
}

.kpi-card:nth-child(2) .kpi-icon-box {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
}

.kpi-card:nth-child(3) .kpi-icon-box {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
}

.kpi-card:nth-child(4) .kpi-icon-box {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

/* 2 Columns Main Section */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

/* Panel Header styling */
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.panel-header .badge {
  background: var(--primary-color);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Dropzone (Upload) Component */
.dropzone-container {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.dropzone {
  border: 2px dashed var(--dropzone-border);
  background-color: var(--dropzone-bg);
  border-radius: 12px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary-color);
  background-color: var(--primary-light);
  transform: translateY(-2px);
}

.dropzone-icon {
  color: var(--primary-color);
  transition: var(--transition);
}

.dropzone:hover .dropzone-icon {
  transform: translateY(-5px);
}

.dropzone-main-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-color);
}

.dropzone-sub-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.supported-formats {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.format-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: var(--border-color);
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* File Status Panel & Lists */
.file-list-container {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  animation: slideIn 0.3s ease;
  transition: var(--transition);
}

.file-item:hover {
  transform: translateX(4px);
  border-color: var(--primary-color);
}

.file-info-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow: hidden;
}

.file-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.7rem;
  color: white;
  flex-shrink: 0;
}

.file-icon.pdf { background-color: #ef4444; }
.file-icon.docx { background-color: #3b82f6; }
.file-icon.xlsx { background-color: #10b981; }
.file-icon.img { background-color: #8b5cf6; }

.file-details {
  overflow: hidden;
}

.file-name {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  max-width: 180px;
}

.file-size {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.file-actions-block {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-badge {
  color: var(--success-color);
  display: flex;
  align-items: center;
}

.delete-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: var(--transition);
}

.delete-btn:hover {
  color: var(--danger-color);
  background: var(--danger-light);
}

/* Preset/Sample Files Box */
.preset-section {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border-color);
}

.preset-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.preset-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.preset-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.85rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: var(--transition);
  text-align: left;
}

.preset-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.preset-btn-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Right Panel: Extracted Data Table Panel */
.table-panel-container {
  padding: 1.5rem;
  min-height: 480px;
  display: flex;
  flex-direction: column;
}

.table-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.search-filter-group {
  display: flex;
  gap: 0.75rem;
  flex-grow: 1;
  max-width: 600px;
}

.search-wrapper {
  position: relative;
  flex-grow: 1;
}

.search-input {
  width: 100%;
  padding: 0.5rem 0.75rem 0.5rem 2.25rem;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-color);
  color: var(--text-color);
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.search-icon-inside {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

.filter-select {
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-color);
  color: var(--text-color);
  outline: none;
  cursor: pointer;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
  background-size: 1rem;
}

.filter-select:focus {
  border-color: var(--primary-color);
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

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

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

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

.btn-success:hover {
  background-color: var(--success-hover);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

/* Table Style */
.table-responsive {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-color);
  flex-grow: 1;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

thead {
  background-color: rgba(148, 163, 184, 0.08);
  border-bottom: 1px solid var(--border-color);
}

th {
  padding: 0.85rem 1rem;
  font-weight: 600;
  color: var(--text-color);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.85rem;
}

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

tr:hover td {
  background-color: rgba(37, 99, 235, 0.03);
}

.vendor-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.vendor-a { background: rgba(37, 99, 235, 0.15); color: #2563eb; }
.vendor-b { background: rgba(139, 92, 246, 0.15); color: #8b5cf6; }
.vendor-c { background: rgba(236, 72, 153, 0.15); color: #ec4899; }

.source-file-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.75rem;
}

.source-file-link:hover {
  color: var(--primary-color);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  color: var(--text-secondary);
  gap: 1rem;
}

.empty-state-icon {
  color: var(--border-color);
}

/* Deep Insights Section & Tabs */
.insights-container {
  padding: 1.5rem;
}

.insights-tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.tab-btn {
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

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

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

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

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

/* Insights Layout Details */
.insights-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
}

@media (max-width: 968px) {
  .insights-grid {
    grid-template-columns: 1fr;
  }
}

.chart-wrapper {
  background: var(--bg-color);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.insights-cards-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.insight-item-card {
  padding: 1.25rem;
  border-left: 4px solid var(--primary-color);
  background: var(--bg-color);
  border-radius: 0 8px 8px 0;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.insight-item-card.success { border-left-color: var(--success-color); }
.insight-item-card.warning { border-left-color: var(--warning-color); }
.insight-item-card.danger { border-left-color: var(--danger-color); }

.insight-item-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.insight-item-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.insight-item-card ul {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-left: 1.25rem;
  margin-top: 0.5rem;
}

.insight-item-card li {
  margin-bottom: 0.25rem;
}

/* Strategic Recommendations Lists */
.rec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.rec-card {
  padding: 1.5rem;
  background: var(--bg-color);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.rec-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.rec-card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.rec-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.rec-item {
  display: flex;
  gap: 0.75rem;
}

.rec-bullet {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.rec-card:nth-child(2) .rec-bullet {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

.rec-text h4 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.rec-text p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Loading Overlay for Simulation */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  border-radius: 12px;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}

.loading-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

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

/* Comparison list on market consistency tab */
.comparison-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comparison-item {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.comparison-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.comparison-item-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.comparison-variance {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.variance-high {
  background: var(--danger-light);
  color: var(--danger-color);
}

.variance-low {
  background: var(--success-light);
  color: var(--success-color);
}

.comparison-prices-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
}

.price-supplier-box {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: 6px;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
}

.price-supplier-name {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-bottom: 0.25rem;
}

.price-supplier-val {
  font-weight: 600;
}

.price-supplier-val.lowest {
  color: var(--success-color);
}