:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --danger: #ef4444;
  --danger-bg: #fef2f2;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-secondary: #f1f5f9;
  
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --border: #e2e8f0;
  --border-focus: #3b82f6;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --radius: 10px;
}

[data-theme="dark"] {
  --bg-page: #0f172a;
  --bg-card: #1e293b;
  --bg-secondary: #334155;
  
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --border: #334155;
  --primary-light: #1e3a8a;
  --success-bg: #064e3b;
  --danger-bg: #7f1d1d;
  --warning-bg: #78350f;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-weight: bold;
  font-size: 20px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.brand h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.brand p {
  font-size: 13px;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Metric Cards */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.metric-card .title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-card .value {
  font-size: 28px;
  font-weight: 700;
  margin-top: 4px;
  color: var(--text-main);
}

.metric-card .sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.metric-card.accent {
  border-left: 4px solid var(--primary);
}

.metric-card.success {
  border-left: 4px solid var(--success);
}

/* Controls Panel */
.control-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.select-input, .text-input {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  outline: none;
  min-width: 180px;
  transition: border-color 0.2s;
}

.select-input:focus, .text-input:focus {
  border-color: var(--border-focus);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  user-select: none;
}

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

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

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-main);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: #e2e8f0;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

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

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* Tabs */
.tabs-nav {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab-btn {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

.tab-content {
  display: none;
}

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

/* Content Card */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  min-height: 400px;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.data-table th {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 10px 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
}

.data-table tr:hover {
  background: rgba(241, 245, 249, 0.6);
}

.data-table tr.row-best {
  background: var(--success-bg);
}

/* Badges & Pills */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
}

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

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

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

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: bold;
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.rank-1 {
  background: #fef3c7;
  color: #b45309;
}

.rank-2 {
  background: #f1f5f9;
  color: #475569;
}

.rank-3 {
  background: #ffedd5;
  color: #c2410c;
}

.makespan-pill {
  display: inline-block;
  font-weight: 700;
  font-size: 14px;
}

.makespan-best {
  color: var(--success);
  font-size: 16px;
}

/* Resource Cards */
.resource-profiles-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.resource-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: var(--bg-card);
}

.resource-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.resource-stats {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Summary Banner */
.summary-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  padding: 16px;
  background: var(--bg-secondary);
  border-radius: 8px;
}

.summary-stat-box {
  display: flex;
  flex-direction: column;
}

.summary-stat-box .label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.summary-stat-box .val {
  font-size: 22px;
  font-weight: 700;
  margin-top: 4px;
}

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

/* File Drop Zone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-page);
}

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

.dropzone p {
  color: var(--text-secondary);
  font-size: 13px;
}

/* MDI Grid View (Replicating Lecturer Slide Layout) */
.mdi-grid-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

.mdi-window {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.mdi-titlebar {
  background: #e2e8f0;
  color: #1e293b;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  user-select: none;
}

[data-theme="dark"] .mdi-titlebar {
  background: #334155;
  color: #f8fafc;
}

.mdi-controls {
  font-size: 11px;
  color: #64748b;
  letter-spacing: 4px;
  cursor: pointer;
}

.mdi-body {
  padding: 8px;
  background: var(--bg-card);
}

/* Modal Dialog */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 480px;
  box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.2);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.btn-icon {
  background: transparent;
  border: none;
  font-size: 16px;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-row label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group-box {
  background: var(--warning-bg);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 6px;
  padding: 12px;
}

.modal-footer {
  padding: 14px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* Print Optimization */
@media print {
  .classic-menubar,
  .classic-toolbar,
  .app-header button,
  .control-panel,
  .dropzone,
  .tabs-nav,
  .modal-backdrop {
    display: none !important;
  }
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }
  .container {
    max-width: 100% !important;
    padding: 0 !important;
  }
  .content-card {
    border: none !important;
    box-shadow: none !important;
  }
}

/* ===================================================
   RESCON Classic Menu Bar & Toolbar Styling
   =================================================== */

.classic-menubar {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 8px 8px 0 0;
  display: flex;
  padding: 2px 6px;
  font-size: 13px;
  user-select: none;
  border-bottom: none;
}

[data-theme="dark"] .classic-menubar {
  background: #1e293b;
}

.menu-root {
  position: relative;
}

.menu-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 4px;
}

.menu-btn:hover, .menu-root:hover .menu-btn {
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary);
}

.menu-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  border-radius: 6px;
  min-width: 230px;
  z-index: 1000;
  padding: 4px 0;
}

.menu-root:hover .menu-dropdown {
  display: block;
}

.menu-dropdown a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 14px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 13px;
  cursor: pointer;
}

.menu-dropdown a:hover {
  background: var(--primary);
  color: #ffffff;
}

.menu-dropdown a .shortcut {
  font-size: 11px;
  opacity: 0.7;
}

.menu-sep {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* Classic Toolbar */
.classic-toolbar {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 0 0 8px 8px;
  display: flex;
  align-items: center;
  padding: 4px 8px;
  gap: 4px;
  margin-bottom: 20px;
  overflow-x: auto;
}

[data-theme="dark"] .classic-toolbar {
  background: #0f172a;
}

.tb-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-main);
  padding: 5px 8px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.tb-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--border);
}

.tb-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
}

/* MDI Desktop Workspace & Floating Windows */
.mdi-desktop-workspace {
  position: relative;
  width: 100%;
  min-height: 780px;
  background: #e2e8f0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

[data-theme="dark"] .mdi-desktop-workspace {
  background: #090d16;
}

.mdi-window-floating {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid #94a3b8;
  border-radius: 6px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mdi-window-floating.active {
  border-color: var(--primary);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.25);
}

.mdi-window-floating .mdi-titlebar {
  background: #cbd5e1;
  color: #0f172a;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
  border-bottom: 1px solid #94a3b8;
}

.mdi-window-floating.active .mdi-titlebar {
  background: linear-gradient(90deg, #2563eb, #3b82f6);
  color: #ffffff;
}

.mdi-title-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mdi-controls {
  display: flex;
  gap: 4px;
}

.mdi-btn-ctrl {
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.8);
  color: #0f172a;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 3px;
  font-size: 11px;
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  line-height: 1;
}

.mdi-btn-ctrl:hover {
  background: #ffffff;
}

.mdi-btn-close:hover {
  background: #ef4444;
  color: #ffffff;
}

.mdi-resizer {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  cursor: se-resize;
  background: linear-gradient(135deg, transparent 50%, #94a3b8 50%);
}

/* ===================================================
   Chart Export Button & Dropdown Menu
   =================================================== */

.mdi-btn-export {
  font-size: 11px;
  background: rgba(255, 255, 255, 0.85);
  margin-right: 4px;
}

.mdi-btn-export:hover {
  background: #2563eb;
  color: #ffffff;
}

.export-dropdown-menu {
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--border, #cbd5e1);
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  min-width: 250px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  animation: fadeInDown 0.15s ease-out;
}

[data-theme="dark"] .export-dropdown-menu {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.export-dropdown-header {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary, #64748b);
  padding: 4px 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border, #e2e8f0);
  margin-bottom: 4px;
}

.export-dropdown-item {
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  color: var(--text-main, #0f172a);
}

.export-dropdown-item:hover {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary, #2563eb);
}

.export-dropdown-item .icon {
  font-size: 18px;
  line-height: 1;
}

.export-dropdown-item .desc {
  display: flex;
  flex-direction: column;
}

.export-dropdown-item .desc strong {
  font-size: 13px;
  font-weight: 600;
}

.export-dropdown-item .desc small {
  font-size: 11px;
  color: var(--text-secondary, #64748b);
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}