:root {
  --bg-main: #f1f5f9;
  --bg-card: #ffffff;
  --bg-header: #f8fafc;
  --bg-table-header: #e2e8f0;
  --bg-row-alt: #f8fafc;
  --bg-hover: #e0f2fe;
  --bg-subtotal: #edf2f7;
  --bg-total: #0f172a;
  --border-color: #cbd5e1;
  --border-dark: #94a3b8;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
  
  /* Vibrant high-contrast accent colors */
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --green: #059669;
  --green-bg: #ecfdf5;
  --green-border: #a7f3d0;
  --green-text: #065f46;
  
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --amber-border: #fde68a;
  --amber-text: #92400e;
  
  --red: #dc2626;
  --red-bg: #fef2f2;
  --red-border: #fecaca;
  --red-text: #991b1b;
  
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --blue-border: #bfdbfe;
  --blue-text: #1e40af;
  
  --purple: #7c3aed;
  --purple-bg: #f5f3ff;
  --purple-border: #ddd6fe;
  --purple-text: #5b21b6;
  
  --cyan: #0891b2;
  --cyan-bg: #ecfeff;
  --cyan-border: #a5f3fc;
  --cyan-text: #155e75;

  --font-mono: "JetBrains Mono", "Cascadia Code", "Segoe UI Mono", Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html, body {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.35;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

/* Dense Monospace Typography for Numbers */
.num, td.num, th.num, .metric-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.text-center { text-align: center; }
.text-left { text-align: left; }
.bold { font-weight: 700; }
.text-muted { color: var(--text-muted); }
.text-green { color: var(--green-text); font-weight: 700; }
.text-amber { color: var(--amber-text); font-weight: 700; }
.text-red { color: var(--red-text); font-weight: 700; }
.text-blue { color: var(--blue-text); font-weight: 700; }
.text-purple { color: var(--purple-text); font-weight: 700; }
.text-cyan { color: var(--cyan-text); font-weight: 700; }

/* Top Bar */
header {
  flex-shrink: 0;
  background: #ffffff;
  border-bottom: 1.5px solid var(--border-color);
  padding: 5px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
}

.brand-badge {
  background: var(--blue);
  color: #fff;
  font-size: 9.5px;
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Nav Tabs */
.nav-tabs {
  display: flex;
  gap: 3px;
  background: var(--bg-main);
  padding: 2px;
  border-radius: 5px;
  border: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  text-decoration: none;
}

.tab-btn:hover {
  color: var(--text-main);
  background: #e2e8f0;
}

.tab-btn.active {
  background: var(--blue);
  color: #ffffff;
  box-shadow: 0 1px 3px rgba(37,99,235,0.3);
}

.tab-btn .badge {
  background: rgba(0,0,0,0.15);
  color: inherit;
  padding: 1px 5px;
  border-radius: 10px;
  font-size: 9.5px;
  font-family: var(--font-mono);
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Real-Time Sync Indicator */
.sync-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 1.5px 6px;
  border-radius: 12px;
  font-size: 9.5px;
  font-weight: 700;
  font-family: var(--font-mono);
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  user-select: none;
  transition: all 0.2s ease;
}

.sync-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
}

.sync-online .sync-dot {
  background: #059669;
  box-shadow: 0 0 0 2px rgba(5, 150, 105, 0.2);
}
.sync-online {
  color: #065f46;
  background: #ecfdf5;
  border-color: #a7f3d0;
}

.sync-syncing .sync-dot {
  background: #2563eb;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.25);
  animation: pulse-dot 1s infinite alternate;
}
.sync-syncing {
  color: #1e40af;
  background: #eff6ff;
  border-color: #bfdbfe;
}

.sync-offline .sync-dot {
  background: #dc2626;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.2);
}
.sync-offline {
  color: #991b1b;
  background: #fef2f2;
  border-color: #fecaca;
}

@keyframes pulse-dot {
  from { opacity: 0.4; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1.2); }
}

/* Buttons */
.btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  padding: 3.5px 9px;
  border-radius: 3px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.12s;
  text-decoration: none;
  font-family: inherit;
}
.btn:hover {
  background: #f1f5f9;
  border-color: var(--border-dark);
}
.btn-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-green {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.btn-green:hover { background: #047857; }
.btn-amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}
.btn-amber:hover { background: #b45309; }
.btn-red {
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}
.btn-red:hover { background: #b91c1c; }
.btn-sm {
  padding: 2px 6px;
  font-size: 10px;
}
.btn-icon {
  padding: 2px 5px;
  line-height: 1;
}

/* Main Container (Full Viewport Flexbox) */
main {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 6px 10px 8px;
  overflow: hidden;
}

/* KPI Dense Banner */
.kpi-strip {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
  margin-bottom: 6px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.kpi-label {
  font-size: 9.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kpi-content {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-top: 1px;
}

.kpi-val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  color: var(--text-main);
}

.kpi-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-muted);
}

/* Tab Content (Full Height Container) */
.tab-content {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow: hidden;
}

/* Table Container with Flexbox Stretching */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.table-container.flex-fill {
  flex: 1;
  min-height: 0;
}

.table-scroll-wrapper {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: auto;
}

.table-toolbar {
  flex-shrink: 0;
  padding: 4.5px 8px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.table-title {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #0f172a;
}

.table-toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Category Focus Quick Button Bar */
.cat-quick-bar {
  flex-shrink: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 10px;
  background: #f8fafc;
  border-bottom: 1.5px solid var(--border-color);
  align-items: center;
}

.cat-pill-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 4.5px 11px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  user-select: none;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.cat-pill-btn:hover {
  background: #e2e8f0;
  color: var(--text-main);
  border-color: var(--border-dark);
  box-shadow: 0 2px 4px rgba(0,0,0,0.08);
  transform: translateY(-0.5px);
}

.cat-pill-btn.active {
  background: var(--blue);
  color: #ffffff;
  border-color: var(--blue);
  box-shadow: 0 2px 4px rgba(37,99,235,0.25);
}

.cat-pill-btn.btn-all {
  background: #f1f5f9;
  border-color: #cbd5e1;
  color: var(--text-main);
  font-weight: 800;
}

.cat-pill-btn.btn-all:hover {
  background: #e2e8f0;
  border-color: var(--border-dark);
}

.search-input, .form-input, .form-select {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 2.5px 6px;
  font-size: 11px;
  border-radius: 3px;
  outline: none;
  font-family: inherit;
}

.search-input:focus, .form-input:focus, .form-select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.1);
}

.dense-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11.5px;
}

.dense-table th {
  background: var(--bg-table-header);
  color: #1e293b;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 4px 6px;
  border-bottom: 1.5px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.dense-table td {
  padding: 3px 6px;
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid #e2e8f0;
  white-space: nowrap;
  color: var(--text-main);
}

.dense-table tr:nth-child(even) {
  background: var(--bg-row-alt);
}

.dense-table tr:hover {
  background: var(--bg-hover) !important;
}

/* Category Header Row */
.cat-header-row td {
  background: #e0f2fe !important;
  font-weight: 800;
  font-size: 11.5px;
  color: #0369a1;
  border-top: 1.5px solid #bae6fd;
  border-bottom: 1.5px solid #bae6fd;
  padding: 4px 6px;
  transition: background 0.1s;
}

.cat-header-row:hover td {
  background: #bae6fd !important;
}

/* Category Subtotal Row */
.subtotal-row td {
  background: #f1f5f9 !important;
  font-weight: 700;
  border-top: 1px solid var(--border-color);
  border-bottom: 2px solid var(--border-color);
  color: var(--text-main);
}

/* Grand Total Row */
.grandtotal-row td {
  background: #0f172a !important;
  font-weight: 800;
  font-size: 11.5px;
  border-top: 2.5px solid var(--blue);
  border-bottom: 2.5px solid var(--blue);
  color: #ffffff !important;
  position: sticky;
  bottom: 0;
  z-index: 9;
}
.grandtotal-row td span, .grandtotal-row td strong {
  color: #ffffff !important;
}

/* Badges & Tags */
.badge {
  display: inline-block;
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 9.5px;
  font-weight: 700;
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.badge-blue { background: var(--blue-bg); color: var(--blue-text); border: 1px solid var(--blue-border); }
.badge-green { background: var(--green-bg); color: var(--green-text); border: 1px solid var(--green-border); }
.badge-amber { background: var(--amber-bg); color: var(--amber-text); border: 1px solid var(--amber-border); }
.badge-red { background: var(--red-bg); color: var(--red-text); border: 1px solid var(--red-border); }
.badge-purple { background: var(--purple-bg); color: var(--purple-text); border: 1px solid var(--purple-border); }
.badge-cyan { background: var(--cyan-bg); color: var(--cyan-text); border: 1px solid var(--cyan-border); }

/* Duration Timer Badge */
.timer-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.timer-fresh { background: var(--green-bg); color: var(--green-text); border: 1px solid var(--green-border); }
.timer-mid { background: var(--amber-bg); color: var(--amber-text); border: 1px solid var(--amber-border); }
.timer-old { background: var(--red-bg); color: var(--red-text); border: 1px solid var(--red-border); }

/* Modal Backdrop */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}
.modal-overlay.active {
  display: flex;
}

.modal-box {
  background: #ffffff;
  border: 1px solid var(--border-dark);
  border-radius: 5px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.2);
  width: 780px;
  max-width: 95vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  background: var(--bg-header);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 12.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-body {
  padding: 12px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  background: var(--bg-header);
  padding: 8px 12px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

/* Forms */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 6px;
  margin-bottom: 8px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.form-label {
  font-size: 10px;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
}

.entry-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 6px;
}

.entry-table th {
  background: var(--bg-table-header);
  padding: 4px 5px;
  font-size: 10px;
  text-transform: uppercase;
  color: #1e293b;
  font-weight: 800;
  border: 1px solid var(--border-color);
}

.entry-table td {
  padding: 2.5px 4px;
  border: 1px solid var(--border-color);
  background: #ffffff;
}

.entry-table input, .entry-table select {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: inherit;
  font-size: 11px;
  padding: 1.5px 3px;
  outline: none;
}

.entry-table input:focus, .entry-table select:focus {
  background: var(--bg-hover);
}

.entry-table input.num {
  font-family: var(--font-mono);
  text-align: right;
}

/* Split layout */
.split-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 6px;
}

/* Settings 3-column layout with scroll */
.settings-scroll-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.settings-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 10px 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.settings-card-title {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 5px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 4px;
}

/* Checkbox styled */
input[type="checkbox"] {
  cursor: pointer;
  accent-color: var(--blue);
}

/* Shortcut hint */
.shortcut-hint {
  font-size: 9px;
  background: #e2e8f0;
  padding: 1px 4px;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Collapsible section transition */
.collapsible-content {
  transition: max-height 0.25s ease-out, opacity 0.2s ease-out;
  overflow: hidden;
}
.collapsible-content.collapsed {
  display: none;
}

/* Toast Notification System */
#toastContainer {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 380px;
  background: #ffffff;
  border-left: 4px solid var(--blue);
  border-radius: 4px;
  padding: 6px 10px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  animation: toast-in 0.25s ease-out;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.toast-success { border-left-color: var(--green); color: var(--green-text); }
.toast-error { border-left-color: var(--red); color: var(--red-text); }
.toast-warning { border-left-color: var(--amber); color: var(--amber-text); }
.toast-info { border-left-color: var(--blue); color: var(--blue-text); }

.toast-close {
  background: transparent;
  border: none;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
  padding: 0 2px;
}
.toast-close:hover { color: #0f172a; }

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

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}