:root {
  color-scheme: light;
  font-family: Inter, system-ui, sans-serif;
  --page-gap: clamp(16px, 2vw, 24px);
  --panel-radius: 20px;
  --panel-shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --page-bg: #f8fafc;
  --page-bg-accent: radial-gradient(circle at top right, rgba(37, 99, 235, 0.08), transparent 28%);
  --text-color: #111827;
  --muted-text: #475569;
  --soft-text: #64748b;
  --panel-bg: #ffffff;
  --panel-border: #e2e8f0;
  --card-bg: #f8fafc;
  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --button-bg: #2563eb;
  --button-bg-hover: #1d4ed8;
  --button-text: #ffffff;
  --secondary-bg: #e2e8f0;
  --secondary-bg-hover: #cbd5e1;
  --secondary-text: #0f172a;
  --danger-bg: #fee2e2;
  --danger-bg-hover: #fecaca;
  --danger-text: #991b1b;
  --metric-bg: #f1f5f9;
  --modal-backdrop: rgba(15, 23, 42, 0.45);
  --modal-shadow: 0 24px 60px rgba(15, 23, 42, 0.2);
}

:root[data-theme="rumberg"] {
  --page-bg: #0f163d;
  --page-bg-accent:
    linear-gradient(135deg, rgba(243, 135, 47, 0.16), transparent 28%),
    linear-gradient(180deg, #0f163d 0%, #131b48 100%);
  --text-color: #f8f7f2;
  --muted-text: #c8cbda;
  --soft-text: #9ea4bf;
  --panel-bg: rgba(19, 27, 72, 0.94);
  --panel-border: rgba(243, 135, 47, 0.28);
  --card-bg: rgba(255, 255, 255, 0.04);
  --input-bg: #ffffff;
  --input-border: rgba(15, 22, 61, 0.16);
  --button-bg: #f3872f;
  --button-bg-hover: #de7826;
  --button-text: #ffffff;
  --secondary-bg: rgba(255, 255, 255, 0.08);
  --secondary-bg-hover: rgba(255, 255, 255, 0.14);
  --secondary-text: #f8f7f2;
  --danger-bg: rgba(243, 135, 47, 0.12);
  --danger-bg-hover: rgba(243, 135, 47, 0.2);
  --danger-text: #ffb178;
  --metric-bg: #ffffff;
  --modal-backdrop: rgba(8, 12, 33, 0.58);
  --modal-shadow: 0 24px 60px rgba(4, 8, 24, 0.34);
  --panel-shadow: 0 20px 50px rgba(4, 8, 24, 0.28);
}

html,
body {
  min-height: 100%;
  margin: 0;
  padding: 0;
}

body {
  overflow-x: hidden;
  background: var(--page-bg-accent), var(--page-bg);
  color: var(--text-color);
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  align-items: start;
  gap: var(--page-gap);
  max-width: 1600px;
  min-height: 100vh;
  margin: 0 auto;
  padding: var(--page-gap);
  box-sizing: border-box;
}

.app-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.app-title {
  flex: 1;
  min-width: 0;
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: left;
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  box-shadow: var(--panel-shadow);
  padding: 24px;
  position: sticky;
  top: var(--page-gap);
  max-height: calc(100vh - (var(--page-gap) * 2));
  overflow-y: auto;
  box-sizing: border-box;
}

.sidebar h1 {
  margin-top: 0;
  font-size: 1.4rem;
}

.sidebar-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sidebar-title-row h1 {
  margin-bottom: 0;
}

.section {
  margin-top: 20px;
}

.fold-card {
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  background: var(--card-bg);
  overflow: hidden;
}

.fold-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  margin-top: 0;
  padding: 16px 18px;
  border-radius: 0;
  background: transparent;
  color: var(--text-color);
  text-align: left;
}

.fold-card-header:hover {
  background: rgba(255, 255, 255, 0.04);
}

.fold-card-header-main {
  display: grid;
  gap: 4px;
  min-width: 0;
  flex: 1 1 auto;
}

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

.fold-card-icon-button {
  width: 34px;
  min-width: 34px;
  height: 34px;
  margin-top: 0;
}

.fold-card-title {
  font-size: 1rem;
  font-weight: 600;
}

.fold-card-summary {
  color: var(--muted-text);
  font-size: 0.9rem;
  white-space: pre-line;
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.fold-card-chevron {
  color: var(--muted-text);
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.fold-card-header[aria-expanded="true"] .fold-card-chevron {
  transform: rotate(180deg);
}

.fold-card-content {
  padding: 0 18px 18px;
}

.fold-card-content-static {
  padding: 18px;
}

.fold-card-inner-title {
  display: none;
}

.howto-steps {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.howto-step {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-color);
  line-height: 1.4;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.howto-step-number {
  color: var(--button-bg);
  font-weight: 700;
  min-width: 1.2rem;
}

.howto-step-text {
  flex: 1 1 auto;
}

.howto-accent {
  color: var(--button-bg);
  font-weight: 700;
}

.checkbox-group {
  display: grid;
  gap: 10px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.checkbox-item label {
  font-size: 0.95rem;
}

button {
  width: 100%;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  background: var(--button-bg);
  color: var(--button-text);
  font-size: 1rem;
  cursor: pointer;
  margin-top: 20px;
}

button:hover {
  background: var(--button-bg-hover);
}

.action-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.action-buttons button {
  width: 100%;
  margin-top: 0;
}

.card-action-button {
  width: 100%;
  margin-top: 14px;
  padding: 12px 16px;
  font-size: 1rem;
}

.builder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.builder-header h2 {
  margin: 0;
}

.helper-text {
  margin: 10px 0 0;
  color: var(--muted-text);
  font-size: 0.9rem;
}

.secondary-button {
  width: auto;
  margin-top: 0;
  padding: 8px 12px;
  background: var(--secondary-bg);
  color: var(--secondary-text);
  font-size: 0.9rem;
}

.secondary-button:hover {
  background: var(--secondary-bg-hover);
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  min-width: 40px;
  height: 40px;
  margin-top: 0;
  padding: 0;
  border-radius: 999px;
  background: var(--secondary-bg);
  color: var(--secondary-text);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
}

.icon-button:hover {
  background: var(--secondary-bg-hover);
  color: var(--secondary-text);
  text-decoration: none;
}

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

.danger-button:hover {
  background: var(--danger-bg-hover);
}

.accent-button {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.accent-button:hover {
  background: var(--danger-bg-hover);
}

.selected-items {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.selected-item-card {
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 14px;
  background: var(--card-bg);
}

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

.selected-item-title {
  font-weight: 600;
  margin-right: auto;
}

.structured-help-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--panel-border);
  background: var(--card-bg);
  color: var(--soft-text);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

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

.structured-product-selector {
  grid-column: 1 / -1;
}

.structured-product-label-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.selected-item-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.rebalance-card {
  padding: 16px;
}

.portfolio-params-shell {
  border: none;
  background: transparent;
  padding: 0;
}

.portfolio-summary-card {
  margin-bottom: 0;
}

.portfolio-summary-grid {
  margin-bottom: 0;
}

.portfolio-summary-grid > div {
  padding: 9px 10px;
  line-height: 1.2;
}

.portfolio-summary-grid strong {
  display: inline-block;
  margin-bottom: 4px;
  line-height: 1.1;
}

.portfolio-summary-current {
  color: var(--text-color);
  line-height: 1.15;
}

.portfolio-summary-previous {
  margin-top: 2px;
  color: var(--soft-text);
  font-size: 0.82rem;
  line-height: 1.1;
}

.portfolio-card-group {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.portfolio-card-group + .portfolio-card-group {
  margin-top: 12px;
}

.portfolio-card-group-title {
  margin-bottom: 10px;
  color: var(--muted-text);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.portfolio-card-group-results {
  background: rgba(255, 255, 255, 0.035);
}

.portfolio-summary-empty {
  border: 1px dashed var(--input-border);
  border-radius: 12px;
  padding: 12px;
  color: var(--soft-text);
  background: var(--metric-bg);
  font-size: 0.92rem;
}

.rebalance-grid {
  align-items: end;
}

.rebalance-grid-compact {
  grid-template-columns: minmax(0, 1fr);
}

.rebalance-grid-expanded {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.risk-grid {
  align-items: end;
}

.risk-grid-base {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.risk-grid-with-period {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.risk-grid-with-var {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.item-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.item-field-label {
  font-size: 0.85rem;
  color: var(--muted-text);
}

.item-select {
  width: 100%;
  border: 1px solid var(--input-border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--input-bg);
  color: var(--text-color);
  font: inherit;
  box-sizing: border-box;
}

.empty-state {
  border: 1px dashed var(--input-border);
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  color: var(--soft-text);
  background: var(--card-bg);
}

.hidden {
  display: none !important;
}

.status {
  margin-top: 12px;
  color: var(--muted-text);
  font-size: 0.95rem;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--modal-backdrop);
  z-index: 50;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  width: min(100%, 420px);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: var(--modal-shadow);
  padding: 20px;
}

.modal-card-wide {
  width: min(100%, 980px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.modal-header h2 {
  margin: 0;
}

.modal-body {
  display: grid;
  gap: 12px;
}

.checkbox-field {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted-text);
  font-size: 0.95rem;
}

.checkbox-field input {
  margin: 0;
}

.content {
  display: grid;
  grid-template-rows: minmax(320px, 58vh) minmax(320px, auto);
  gap: var(--page-gap);
  min-width: 0;
}

.allocation-compare-shell {
  position: relative;
}

.allocation-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  height: 100%;
}

.allocation-panels-split-vertical {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.allocation-panels-split-horizontal {
  grid-template-columns: 1fr;
}

.allocation-panel {
  min-height: 260px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 8px;
}

.allocation-panel-title {
  color: var(--muted-text);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.summary-previous-inline {
  color: var(--soft-text);
  font-size: 0.82rem;
}

.history-table-wrap {
  overflow-x: auto;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.history-table th,
.history-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--panel-border);
  text-align: left;
  vertical-align: top;
}

.history-table th {
  color: var(--muted-text);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.history-load-button {
  white-space: nowrap;
}

.history-saved-cell {
  white-space: nowrap;
  color: var(--muted-text);
  font-variant-numeric: tabular-nums;
}

.top-panel,
.bottom-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--panel-radius);
  box-shadow: var(--panel-shadow);
  padding: 24px;
  min-height: 0;
  box-sizing: border-box;
}

.top-panel {
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.panel-header {
  margin-bottom: 18px;
}

.panel-header h2,
.panel-header p {
  margin: 0;
}

.panel-header p {
  margin-top: 6px;
  color: var(--muted-text);
}

:root[data-theme="rumberg"] .top-panel,
:root[data-theme="rumberg"] .bottom-panel {
  background: #ffffff;
  border-color: rgba(243, 135, 47, 0.24);
}

:root[data-theme="rumberg"] .item-select,
:root[data-theme="rumberg"] input,
:root[data-theme="rumberg"] select {
  color: #191a30;
}

:root[data-theme="rumberg"] .top-panel .panel-header h2,
:root[data-theme="rumberg"] .bottom-panel .panel-header h2,
:root[data-theme="rumberg"] .top-panel .chart-toggle,
:root[data-theme="rumberg"] .bottom-panel,
:root[data-theme="rumberg"] .allocation-summary,
:root[data-theme="rumberg"] .metrics-row div {
  color: #191a30;
}

:root[data-theme="rumberg"] .top-panel .panel-header p,
:root[data-theme="rumberg"] .bottom-panel .panel-header p {
  color: #5f6175;
}

:root[data-theme="rumberg"] .fold-card {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(243, 135, 47, 0.24);
}

:root[data-theme="rumberg"] .fold-card-header:hover {
  background: rgba(255, 255, 255, 0.04);
}

.chart-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--muted-text);
  font-size: 0.95rem;
}

.chart-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.chart-controls .chart-toggle {
  margin-bottom: 0;
}
/* 
.chart-action-button {
  width: auto;
  margin-top: 0;
} */

/* Improve visibility of chart actions (Reset Zoom) */
.chart-action-button {
  color: var(--portfolio-accent, #494e57);
  font-weight: 600;
  opacity: 1;
    width: auto;
  margin-top: 0;

  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
}

/* Rumberg theme override */
:root[data-theme="rumberg"] .chart-action-button {
  color: #45464b;               /* strong dark text */
  background-color: #f5f5f7;   /* subtle light bg */
  border: 1px solid #d1d5db;
}

/* Hover state */
.chart-action-button:hover {
  filter: brightness(0.95);
  cursor: pointer;
}

.chart-toggle input {
  margin: 0;
}

.bottom-panel {
  min-height: 320px;
}

.chart-shell {
  position: relative;
  width: 100%;
  min-width: 0;
  overflow: hidden;
}

.chart-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(3px);
  z-index: 2;
  color: var(--muted-text);
  font-size: 0.95rem;
}

:root[data-theme="Rumberg"] .chart-loading {
  background: rgba(247, 251, 255, 0.78);
}

.chart-loading.hidden {
  display: none;
}

.chart-loading-spinner {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 3px solid rgba(148, 163, 184, 0.28);
  border-top-color: var(--button-bg);
  animation: chart-spin 0.8s linear infinite;
}

@keyframes chart-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.chart-shell-lg {
  flex: 1 1 auto;
  min-height: 280px;
  height: clamp(280px, 48vh, 560px);
}

.chart-shell-sm {
  min-height: 260px;
  height: min(420px, 45vh);
}

.chart-shell canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.allocation-summary {
  margin-bottom: 16px;
}

.metrics-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.metrics-row div {
  background: var(--metric-bg);
  border-radius: 12px;
  padding: 12px;
  flex: 1 1 120px;
}

@media (max-width: 1100px) {
  .page-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .content {
    grid-template-rows: auto auto;
  }
}

@media (max-width: 768px) {
  .page-grid,
  .top-panel,
  .bottom-panel,
  .sidebar {
    padding: 16px;
  }

  .chart-shell-lg {
    min-height: 320px;
    height: clamp(320px, 54vh, 460px);
  }

  .chart-shell-sm {
    min-height: 300px;
    height: min(360px, 44vh);
  }

  .allocation-panels-split-vertical {
    grid-template-columns: 1fr;
  }

  .builder-header,
  .selected-item-header {
    align-items: stretch;
    flex-direction: column;
  }

  .secondary-button {
    width: 100%;
  }

  .chart-controls {
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
  }

  .chart-toggle {
    justify-content: center;
  }

  .chart-action-button {
    width: 100%;
  }

  .panel-header {
    margin-bottom: 14px;
  }

  .panel-header h2 {
    font-size: 1.1rem;
  }

  .panel-header p {
    font-size: 0.92rem;
  }

  .metrics-row {
    gap: 10px;
  }

  .metrics-row div {
    flex-basis: calc(50% - 10px);
    padding: 10px;
  }

  .selected-item-grid {
    grid-template-columns: 1fr;
  }

  .rebalance-grid-expanded {
    grid-template-columns: 1fr;
  }

  .risk-grid-base,
  .risk-grid-with-period,
  .risk-grid-with-var {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .page-grid,
  .top-panel,
  .bottom-panel,
  .sidebar {
    padding: 12px;
  }

  .page-grid {
    gap: 12px;
  }

  .sidebar h1 {
    font-size: 1.2rem;
  }

  .chart-shell-lg {
    min-height: 340px;
    height: 58vh;
  }

  .chart-shell-sm {
    min-height: 320px;
    height: 46vh;
  }

  .metrics-row div {
    flex-basis: 100%;
  }

  .selected-item-card {
    padding: 12px;
  }
}