:root {
  --bg-color: #0f172a;
  --surface-color: #1e293b;
  --surface-color-hover: #334155;
  --border-color: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --color-primary: #38bdf8;
  --color-primary-glow: rgba(56, 189, 248, 0.15);
  
  --color-cheap: #10b981;
  --color-cheap-bg: rgba(16, 185, 129, 0.15);
  --color-mid: #f59e0b;
  --color-mid-bg: rgba(245, 158, 11, 0.15);
  --color-expensive: #ef4444;
  --color-expensive-bg: rgba(239, 68, 68, 0.15);

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
  padding: 1.5rem 1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.title-group h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.title-group p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

/* Unit toggle — segmented pill */
.unit-toggle {
  display: inline-flex;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.unit-toggle-btn {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  transition: background-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.unit-toggle-btn:hover:not(.active) {
  background-color: var(--surface-color-hover);
  color: var(--text-primary);
}

.unit-toggle-btn.active {
  background-color: var(--color-primary);
  color: #0f172a;
  font-weight: 700;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-cheap);
}

.status-dot.loading {
  background-color: var(--color-mid);
  animation: pulse 1.5s infinite;
}

.status-dot.error {
  background-color: var(--color-expensive);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  color: var(--text-primary);
  transition: all 0.15s ease-in-out;
}

.btn:hover:not(:disabled) {
  background-color: var(--surface-color-hover);
  border-color: var(--color-primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn.active {
  background-color: var(--color-primary);
  color: #0f172a;
  border-color: var(--color-primary);
  font-weight: 600;
}

/* Metric Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.card-highlight {
  border-color: var(--color-primary);
  background: linear-gradient(145deg, var(--surface-color), #1a304d);
}

/* Current price card — spans 2 cols on wider grids */
.card-current-price {
  grid-column: span 2;
}

@media (max-width: 640px) {
  .card-current-price {
    grid-column: span 2;
  }
}

.current-price-main {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.current-price-diff-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.current-price-diff-label {
  color: var(--text-secondary);
}

.current-diff-badge {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
}

.current-diff-badge.diff-up {
  background-color: var(--color-expensive-bg);
  color: var(--color-expensive);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.current-diff-badge.diff-down {
  background-color: var(--color-cheap-bg);
  color: var(--color-cheap);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.current-diff-badge.diff-neutral {
  background-color: var(--color-mid-bg);
  color: var(--color-mid);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Progress bar: min → current → max */
.current-price-bar-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.15rem;
}

.bar-edge-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 3.5rem;
}

.bar-edge-label:last-child {
  text-align: right;
}

.current-price-bar {
  flex: 1;
  height: 8px;
  background-color: rgba(51, 65, 85, 0.6);
  border-radius: 9999px;
  position: relative;
  overflow: visible;
}

.current-price-bar-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-radius: 9999px;
  background: linear-gradient(90deg, var(--color-cheap) 0%, var(--color-mid) 50%, var(--color-expensive) 100%);
  transition: width 0.4s ease;
}

.current-price-bar-thumb {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--text-primary);
  border: 2px solid var(--color-primary);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.5);
  transition: left 0.4s ease;
}

.current-price-time {
  margin-top: 0.1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}


.card-title {
  font-size: 0.825rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.card-unit {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 0.25rem;
}

.card-subtext {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Price Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-cheap {
  background-color: var(--color-cheap-bg);
  color: var(--color-cheap);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-mid {
  background-color: var(--color-mid-bg);
  color: var(--color-mid);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-expensive {
  background-color: var(--color-expensive-bg);
  color: var(--color-expensive);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Controls & View Modes */
.view-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  background-color: var(--surface-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* History Progress Container */
.history-progress-container {
  background-color: var(--surface-color);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.15);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.history-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.history-progress-title {
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.history-progress-stats {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: monospace;
}

.history-progress-bar-track {
  width: 100%;
  height: 8px;
  background-color: var(--bg-color);
  border-radius: 9999px;
  overflow: hidden;
  position: relative;
}

.history-progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), #818cf8);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

/* History Panel */
.history-panel {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  box-shadow: var(--shadow);
}

.history-controls-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.history-input-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.history-input-group code {
  color: var(--color-primary);
  background: var(--bg-color);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.history-input-group input {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  width: 120px;
}

.history-input-group input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.history-actions-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.history-selection-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(51, 65, 85, 0.5);
}

.quick-select-buttons {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.btn-sm {
  padding: 0.3rem 0.65rem;
  font-size: 0.775rem;
  border-radius: var(--radius-sm);
}

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

/* Calendar Container */
.calendar-container {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0.25rem;
}

.calendar-current-month {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-bottom: 0.25rem;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}

.calendar-days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
}

.cal-day {
  min-height: 52px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  position: relative;
  transition: all 0.15s ease;
  user-select: none;
}

.cal-day-pad {
  opacity: 0.15;
}

.cal-day-unavailable {
  opacity: 0.35;
  background-color: rgba(30, 41, 59, 0.3);
  color: var(--text-muted);
}

.cal-day-available {
  cursor: pointer;
  background-color: var(--surface-color);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.cal-day-available:hover {
  border-color: var(--color-primary);
  background-color: var(--surface-color-hover);
  transform: translateY(-1px);
}

.cal-day-selected {
  background-color: rgba(56, 189, 248, 0.18) !important;
  border-color: var(--color-primary) !important;
  font-weight: 600;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.25);
}

.cal-day-number {
  font-size: 0.85rem;
  line-height: 1.1;
}

.cal-day-avg {
  font-size: 0.65rem;
  color: var(--text-secondary);
  line-height: 1.1;
  margin-top: 2px;
}

.cal-day-tag {
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  line-height: 1;
  margin-top: 2px;
}

.cal-day-tag-gaur {
  background: var(--color-primary);
  color: #0f172a;
}

.cal-day-tag-bihar {
  background: #a855f7;
  color: #ffffff;
}

/* Selected Days Summary */
.selected-days-summary {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(51, 65, 85, 0.4);
}

.selected-days-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.selected-days-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  max-height: 100px;
  overflow-y: auto;
}

.selected-day-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.55rem;
  border-radius: 9999px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-primary);
}

.selected-day-tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.selected-day-tag-remove {
  cursor: pointer;
  color: var(--text-muted);
  margin-left: 0.2rem;
  font-size: 0.8rem;
  font-weight: bold;
}

.selected-day-tag-remove:hover {
  color: var(--color-expensive);
}


/* Chart Container */
.chart-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chart-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.chart-help {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
}

.chart-wrapper-boxplot {
  height: 440px;
}

/* Boxplot Controls */
.boxplot-controls {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.boxplot-filter-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(51, 65, 85, 0.4);
}

.boxplot-daytype-options {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.boxplot-controls-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.boxplot-filter-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.boxplot-quick-actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.boxplot-month-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-height: 140px;
  overflow-y: auto;
  padding: 0.2rem 0;
}

.month-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  user-select: none;
}

.month-filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--text-primary);
}

.month-filter-chip.active {
  background-color: rgba(56, 189, 248, 0.15);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
}

.month-filter-chip .chip-count {
  font-size: 0.7rem;
  background-color: var(--bg-color);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--text-muted);
}

.month-filter-chip.active .chip-count {
  background-color: var(--color-primary);
  color: #0f172a;
  font-weight: 700;
}

.boxplot-stats-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.4rem;
  border-top: 1px solid rgba(51, 65, 85, 0.4);
}

.boxplot-stats-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Notice box */
.notice-box {
  display: none;
  padding: 0.75rem 1rem;
  background-color: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: 0.85rem;
}

/* Hourly Breakdown Table */
.table-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.table-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
}

.table-toggle-icon {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: transform 0.2s;
}

.table-toggle-icon.collapsed {
  transform: rotate(-90deg);
}

.table-wrapper {
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
}

.table-wrapper.collapsed {
  display: none;
}

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

th {
  background-color: var(--bg-color);
  color: var(--text-secondary);
  font-weight: 600;
  padding: 0.75rem 1rem;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid rgba(51, 65, 85, 0.5);
  color: var(--text-primary);
}

tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

tr.current-hour-row td {
  background-color: rgba(56, 189, 248, 0.12);
  font-weight: 600;
}

/* Footer */
footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

footer a {
  color: var(--color-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  body {
    padding: 1rem 0.5rem;
  }
  .cards-grid {
    grid-template-columns: 1fr 1fr;
  }
  .card-value {
    font-size: 1.5rem;
  }
  .chart-wrapper {
    height: 280px;
  }
}