:root {
  --color-high: #dc3545;
  --color-medium: #ffc107;
  --color-low: #28a745;
  --color-negative: #007bff;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-light: #6c757d;
  --color-border: #dee2e6;
  --spacing-unit: 1rem;
  --border-radius: 8px;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.15);
}

:root[data-theme="dark"] {
  --color-high: #ff6b6b;
  --color-medium: #ffd93d;
  --color-low: #6bcf7f;
  --color-negative: #4dabf7;
  --color-bg: #1a1a1a;
  --color-surface: #2d2d2d;
  --color-text: #e0e0e0;
  --color-text-light: #a0a0a0;
  --color-border: #404040;
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.4);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  margin: 0;
  padding: var(--spacing-unit);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Header */
.header {
  padding: calc(var(--spacing-unit) * 1.5);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  position: relative;
  margin-bottom: var(--spacing-unit);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--spacing-unit) * 1);
  margin-bottom: calc(var(--spacing-unit) * 1);
}

.title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-unit);
}

.title-link {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.title-link:hover {
  opacity: 0.7;
}

.date-badge {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.date-badge.today {
  background-color: rgba(40, 167, 69, 0.15);
  color: var(--color-low);
  border: 1px solid var(--color-low);
}

.date-badge.tomorrow {
  background-color: rgba(0, 123, 255, 0.15);
  color: var(--color-negative);
  border: 1px solid var(--color-negative);
}

.date-badge.historical {
  background-color: rgba(108, 117, 125, 0.15);
  color: var(--color-text-light);
  border: 1px solid var(--color-text-light);
}

:root[data-theme="dark"] .date-badge.today {
  background-color: rgba(107, 207, 127, 0.15);
  color: var(--color-low);
}

:root[data-theme="dark"] .date-badge.tomorrow {
  background-color: rgba(77, 171, 247, 0.15);
  color: var(--color-negative);
}

:root[data-theme="dark"] .date-badge.historical {
  background-color: rgba(160, 160, 160, 0.15);
  color: var(--color-text-light);
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-unit);
}

.date-selector {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.75);
  flex: 1;
  min-width: 300px;
}

.date-nav-button {
  padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  color: var(--color-text);
  text-decoration: none;
}

.date-nav-button:hover {
  background: var(--color-border);
  transform: scale(1.05);
}

.date-nav-button:active {
  transform: scale(0.95);
}

.date-display-large {
  flex: 1;
  position: relative;
}

.date-input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
}

.date-text {
  padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.date-input:focus + .date-text,
.date-text:hover {
  border-color: var(--color-low);
  background: rgba(40, 167, 69, 0.05);
}

:root[data-theme="dark"] .date-input:focus + .date-text,
:root[data-theme="dark"] .date-text:hover {
  background: rgba(107, 207, 127, 0.1);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-unit);
}

.settings-button {
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 1.25rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  color: var(--color-text);
}

.settings-button:hover,
.settings-button:focus {
  background: var(--color-border);
}

.settings-button:active {
  transform: scale(0.95);
}

.settings-button__icon {
  font-size: 1.25rem;
  line-height: 1;
}

.region-selector {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.5);
}

.region-selector label {
  font-weight: 500;
  color: var(--color-text-light);
}

.region-selector select,
.region-select {
  padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.3s, color 0.3s;
  min-width: 220px;
}

.push-subscribe {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
}

.push-subscribe__button {
  padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
  border-radius: 999px;
  border: 1px solid var(--color-negative);
  background: rgba(0, 123, 255, 0.1);
  color: var(--color-negative);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.push-subscribe__button:hover:enabled {
  background: rgba(0, 123, 255, 0.2);
}

.push-subscribe__button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.push-subscribe__status {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.theme-toggle {
  width: 100%;
  padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.75);
  min-height: 48px;
  color: var(--color-text);
  text-align: left;
}

.theme-toggle:hover {
  background: var(--color-border);
}

.theme-toggle:active {
  transform: scale(0.98);
}

.theme-toggle__icon {
  font-size: 1.5rem;
  line-height: 1;
}

.theme-toggle__label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.region-selector select:hover,
.region-select:hover {
  border-color: var(--color-text-light);
}

.jump-to-today-button {
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 1);
  background: var(--color-bg);
  border: 1px solid var(--color-low);
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  color: var(--color-low);
  text-decoration: none;
}

.jump-to-today-button:hover {
  background: rgba(40, 167, 69, 0.1);
  transform: scale(1.05);
}

.jump-to-today-button:active {
  transform: scale(0.95);
}

:root[data-theme="dark"] .jump-to-today-button {
  border-color: var(--color-low);
  color: var(--color-low);
}

:root[data-theme="dark"] .jump-to-today-button:hover {
  background: rgba(107, 207, 127, 0.15);
}

.jump-to-today-button.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  border-color: var(--color-border);
  color: var(--color-text-light);
}

.jump-to-today-button.disabled:hover {
  background: var(--color-bg);
  transform: none;
}

.settings-modal {
  display: none;
}

.settings-modal.is-open {
  display: block;
}

.settings-modal__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  z-index: 1000;
}

.settings-modal__dialog {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(90vw, 480px);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-surface);
  border-radius: calc(var(--border-radius) * 1.25);
  box-shadow: var(--shadow-hover);
  padding: calc(var(--spacing-unit) * 1.25);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1);
}

.settings-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: calc(var(--spacing-unit) * 0.75);
}

.settings-modal__title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

.settings-modal__close {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: var(--color-text);
  transition: background 0.2s ease, transform 0.2s ease;
}

.settings-modal__close:hover,
.settings-modal__close:focus {
  background: var(--color-bg);
}

.settings-modal__close:active {
  transform: scale(0.95);
}

.settings-modal__body {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 1);
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 0.75);
  background: var(--color-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 1);
}

.settings-section__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.settings-section__description {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.settings-toggle {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.5);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text);
}

.settings-toggle__input {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
}

.settings-toggle__label {
  display: inline-flex;
  align-items: center;
  line-height: 1.4;
}

.settings-toggle__input:focus-visible + .settings-toggle__label {
  outline: 2px solid var(--color-link, #4a90e2);
  outline-offset: 2px;
  border-radius: 4px;
  padding: 0 2px;
}

/* Availability Banner */
.availability-banner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 0.5);
  padding: var(--spacing-unit);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-unit);
  transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
  cursor: pointer;
  border-left: 4px solid;
}

.availability-content {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.75);
  flex: 1 1 auto;
  min-width: 0;
}

.availability-content .availability-icon {
  flex: 0 0 auto;
}

.availability-content .availability-copy {
  flex: 1 1 auto;
  min-width: 0;
}

.availability-banner:hover {
  transform: translateX(2px);
}

/* Tomorrow state - blue/indigo */
.availability-banner--tomorrow {
  background: rgba(123, 104, 238, 0.1);
  border-left-color: #7b68ee;
}

.availability-banner--tomorrow:hover {
  background: rgba(123, 104, 238, 0.15);
}

:root[data-theme="dark"] .availability-banner--tomorrow {
  background: rgba(123, 104, 238, 0.2);
  border-left-color: #9d8ef0;
}

:root[data-theme="dark"] .availability-banner--tomorrow:hover {
  background: rgba(123, 104, 238, 0.25);
}

/* Today with tomorrow available - green/success */
.availability-banner--today-with-tomorrow {
  background: rgba(40, 167, 69, 0.1);
  border-left-color: var(--color-low);
}

.availability-banner--today-with-tomorrow:hover {
  background: rgba(40, 167, 69, 0.15);
}

:root[data-theme="dark"] .availability-banner--today-with-tomorrow {
  background: rgba(107, 207, 127, 0.2);
  border-left-color: var(--color-low);
}

:root[data-theme="dark"] .availability-banner--today-with-tomorrow:hover {
  background: rgba(107, 207, 127, 0.25);
}

/* Today waiting - orange/warning */
.availability-banner--today-waiting {
  background: rgba(255, 193, 7, 0.1);
  border-left-color: var(--color-medium);
}

.availability-banner--today-waiting:hover {
  background: rgba(255, 193, 7, 0.15);
}

:root[data-theme="dark"] .availability-banner--today-waiting {
  background: rgba(255, 217, 61, 0.2);
  border-left-color: var(--color-medium);
}

:root[data-theme="dark"] .availability-banner--today-waiting:hover {
  background: rgba(255, 217, 61, 0.25);
}

/* Historical - grey/neutral */
.availability-banner--historical {
  background: rgba(108, 117, 125, 0.1);
  border-left-color: var(--color-text-light);
}

.availability-banner--historical:hover {
  background: rgba(108, 117, 125, 0.15);
}

:root[data-theme="dark"] .availability-banner--historical {
  background: rgba(160, 160, 160, 0.15);
  border-left-color: var(--color-text-light);
}

:root[data-theme="dark"] .availability-banner--historical:hover {
  background: rgba(160, 160, 160, 0.2);
}

.availability-icon {
  font-size: 1.25rem;
}

.availability-text {
  font-weight: 500;
  color: var(--color-text);
}

.availability-copy {
  display: flex;
  flex-direction: column;
  gap: calc(var(--spacing-unit) * 0.25);
  flex: 1 1 auto;
  min-width: 220px;
}

.availability-subtext {
  font-size: 0.875rem;
  color: var(--color-text-light);
  font-weight: 400;
  line-height: 1.4;
}

.availability-subtext--ios {
  font-style: italic;
  display: inline-flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.25);
  flex-wrap: wrap;
}

.ios-share-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
}

.ios-share-icon {
  width: 1.1rem;
  height: 1.1rem;
  flex: 0 0 auto;
}

.availability-cta {
  margin-left: auto;
  padding: calc(var(--spacing-unit) * 0.4) calc(var(--spacing-unit) * 0.9);
  border-radius: 999px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.availability-cta:hover,
.availability-cta:focus-visible {
  background-color: rgba(255, 255, 255, 0.2);
}

.availability-cta:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

:root[data-theme="dark"] .availability-cta:hover,
:root[data-theme="dark"] .availability-cta:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
}

.availability-link {
  color: inherit;
  text-decoration: underline;
  font-weight: 600;
  transition: opacity 0.2s ease;
  margin-left: 0.25rem;
}

.availability-link:hover {
  opacity: 0.8;
}

/* Link colors for different states */
.availability-banner--tomorrow .availability-link {
  color: #7b68ee;
}

:root[data-theme="dark"] .availability-banner--tomorrow .availability-link {
  color: #9d8ef0;
}

.availability-banner--today-with-tomorrow .availability-link {
  color: var(--color-low);
}

.availability-banner--today-waiting .availability-link {
  color: var(--color-medium);
}

.availability-banner--historical .availability-link {
  color: var(--color-text-light);
}

/* Summary Section */
.summary-section {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-unit);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  align-items: stretch;
}

.summary-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: var(--spacing-unit);
  min-height: 100%;
}

.summary-card {
  background: var(--color-surface);
  padding: var(--spacing-unit);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.summary-label {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  font-weight: 500;
}

.summary-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.summary-detail {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.summary-card.current-price .summary-value {
  color: var(--color-text);
}

.summary-card.next-low .summary-value {
  color: var(--color-low);
}

.summary-card.day-average .summary-value {
  color: var(--color-text);
}

.summary-card.standard-rate .summary-value {
  color: var(--color-text-light);
}

.summary-card.ai-summary-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.ai-summary-content {
  color: var(--color-text);
  line-height: 1.8;
  font-size: 0.875rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.ai-summary-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: calc(var(--spacing-unit) * 0.5);
  padding: calc(var(--spacing-unit) * 0.5);
  background: var(--color-bg);
  border-radius: var(--border-radius);
  border: 2px dashed var(--color-border);
  color: var(--color-text-light);
  font-style: italic;
  text-align: center;
  min-height: 100px;
}

.ai-summary-placeholder p {
  margin: 0;
  font-size: 0.875rem;
}

/* Chart Section */
.chart-section {
  background: var(--color-surface);
  padding: calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--spacing-unit));
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 calc(var(--spacing-unit) * 1.5) 0;
}

.chart-container {
  width: 100%;
  position: relative;
}

#priceChart {
  max-height: 400px;
  width: 100% !important;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 1.5);
  margin-top: calc(var(--spacing-unit) * 1.5);
  padding-top: calc(var(--spacing-unit) * 1.5);
  border-top: 1px solid var(--color-border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing-unit) * 0.5);
  font-size: 0.875rem;
}

.legend-color {
  width: 20px;
  height: 20px;
  border-radius: 4px;
}

.legend-line {
  display: inline-block;
  width: 20px;
  height: 2px;
  position: relative;
}

.legend-line-price-cap {
  background: repeating-linear-gradient(
    to right,
    #4a90e2 0,
    #4a90e2 8px,
    transparent 8px,
    transparent 12px
  );
  height: 2.5px;
}

.legend-line-median {
  background: repeating-linear-gradient(
    to right,
    #495057 0,
    #495057 1px,
    transparent 1px,
    transparent 4px
  );
}

.legend-line-flux {
  background: repeating-linear-gradient(
    to right,
    #8e44ad 0,
    #8e44ad 4px,
    transparent 4px,
    transparent 8px
  );
  height: 2.5px;
}

/* Dark theme support for legend lines */
[data-theme="dark"] .legend-line-price-cap {
  background: repeating-linear-gradient(
    to right,
    #9fc5e8 0,
    #9fc5e8 8px,
    transparent 8px,
    transparent 12px
  );
}

[data-theme="dark"] .legend-line-median {
  background: repeating-linear-gradient(
    to right,
    #9d9d9d 0,
    #9d9d9d 1px,
    transparent 1px,
    transparent 4px
  );
}

[data-theme="dark"] .legend-line-flux {
  background: repeating-linear-gradient(
    to right,
    #c084fc 0,
    #c084fc 4px,
    transparent 4px,
    transparent 8px
  );
}

.legend-color.high {
  background-color: var(--color-high);
}

.legend-color.medium {
  background-color: var(--color-medium);
}

.legend-color.low {
  background-color: var(--color-low);
}

.legend-color.negative {
  background-color: var(--color-negative);
}

/* Recommendations */
.recommendations-section {
  background: var(--color-surface);
  padding: calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--spacing-unit));
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-unit);
}

.recommendation-card {
  padding: var(--spacing-unit);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.recommendation-card.best-time {
  border-color: var(--color-low);
  background: rgba(40, 167, 69, 0.05);
}

:root[data-theme="dark"] .recommendation-card.best-time {
  background: rgba(107, 207, 127, 0.1);
}

.recommendation-card.middle-time {
  border-color: var(--color-medium);
  background: rgba(255, 193, 7, 0.05);
}

:root[data-theme="dark"] .recommendation-card.middle-time {
  background: rgba(255, 217, 61, 0.1);
}

.recommendation-card.avoid-time {
  border-color: var(--color-high);
  background: rgba(220, 53, 69, 0.05);
}

:root[data-theme="dark"] .recommendation-card.avoid-time {
  background: rgba(255, 107, 107, 0.1);
}

.recommendation-title {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  display: flex;
  align-items: center;
}

.recommendation-icon {
  font-size: 1.5rem;
  margin-right: calc(var(--spacing-unit) * 0.5);
}

.recommendation-times {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
  line-height: 1.4;
}

.recommendation-price-range {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Historical Section */
.historical-section {
  background: var(--color-surface);
  padding: calc(var(--spacing-unit) * 1.5);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.toggle-details {
  width: 100%;
  padding: calc(var(--spacing-unit) * 0.75);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
}

.toggle-details:hover {
  background: var(--color-border);
}

.toggle-arrow {
  transition: transform 0.3s;
}

.toggle-details.expanded .toggle-arrow {
  transform: rotate(180deg);
}

.historical-content {
  margin-top: var(--spacing-unit);
}

.historical-note {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  font-style: italic;
}

.historical-list {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 0.5);
}

.historical-item {
  padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
  background: var(--color-bg);
  border-radius: 4px;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  opacity: 0.7;
}

.historical-item .time {
  font-weight: 600;
  margin-right: calc(var(--spacing-unit) * 0.5);
}

.historical-item .price {
  color: var(--color-text-light);
}

/* Responsive */
@media (max-width: 968px) {
  .summary-section {
    grid-template-columns: 1fr;
  }

  .summary-card.ai-summary-card {
    grid-row: span 1;
  }
}

@media (max-width: 768px) {
  .header {
    padding: calc(var(--spacing-unit) * 1);
  }

  .header-top {
    flex-direction: row;
    align-items: center;
    gap: calc(var(--spacing-unit) * 0.75);
    justify-content: space-between;
    margin-bottom: calc(var(--spacing-unit) * 0.5);
  }

  .availability-content {
    gap: calc(var(--spacing-unit) * 0.5);
    align-items: flex-start;
  }

  .availability-copy {
    min-width: 0;
  }

  .header-main {
    flex-direction: column;
    align-items: stretch;
    gap: calc(var(--spacing-unit) * 1);
  }

  .title {
    flex-wrap: wrap;
    font-size: 1.5rem;
    margin-bottom: 0;
  }

  .date-selector {
    width: 100%;
    min-width: auto;
    order: 1;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: calc(var(--spacing-unit) * 0.5);
    flex-wrap: nowrap;
  }

  .date-nav-button {
    flex: 0 0 auto;
  }

  .date-display-large {
    width: auto;
    flex: 1 1 auto;
    min-width: 0;
  }

  .date-badge {
    font-size: 0.6rem;
    padding: 0.2rem 0.5rem;
  }

  .header-controls {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: calc(var(--spacing-unit) * 0.75);
    order: 2;
  }

  .jump-to-today-button {
    width: 100%;
    font-size: 0.8125rem;
    padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
  }

  .region-selector {
    width: 100%;
    min-width: auto;
    flex-direction: column;
    align-items: stretch;
    gap: calc(var(--spacing-unit) * 0.25);
  }

  .region-selector label {
    display: none; /* Hide "Region:" label on mobile */
  }

  .region-select {
    min-width: 0;
    width: 100%;
    font-size: 0.875rem;
  }

  .summary-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .recommendations-grid {
    grid-template-columns: 1fr;
  }

  #priceChart {
    max-height: 1200px;
    height: 900px;
  }

  .chart-container {
    max-height: none;
    height: auto;
    display: flex;
    flex-direction: column;
    overflow: visible;
  }
  
  .chart-container #priceChart {
    max-height: 1200px;
    height: 900px;
  }

  .settings-modal__dialog {
    width: calc(100vw - calc(var(--spacing-unit) * 2));
    max-height: calc(100vh - calc(var(--spacing-unit) * 2));
    padding: var(--spacing-unit);
  }
}

@media (max-width: 480px) {
  .header-controls {
    flex-direction: column;
  }

  .jump-to-today-button,
  .region-selector {
    min-width: 100%;
    width: 100%;
  }

  .summary-cards-grid {
    grid-template-columns: 1fr;
  }

  .title {
    font-size: 1.2rem;
  }

  .date-text {
    font-size: 0.9375rem;
    padding: calc(var(--spacing-unit) * 0.5) calc(var(--spacing-unit) * 0.75);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  #priceChart {
    max-height: 1400px;
    height: 1100px;
  }

  .chart-container {
    max-height: none;
    height: auto;
    display: flex;
    flex-direction: column;
    overflow: visible;
  }
  
  .chart-container #priceChart {
    max-height: 1400px;
    height: 1100px;
  }

  .chart-legend {
    order: -1;
    gap: calc(var(--spacing-unit) * 0.75);
    font-size: 0.8125rem;
    margin-top: 0;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    padding-top: 0;
    padding-bottom: calc(var(--spacing-unit) * 1.5);
    border-top: none;
    border-bottom: 1px solid var(--color-border);
  }

  .legend-item {
    font-size: 0.75rem;
  }

  .legend-color {
    width: 16px;
    height: 16px;
  }

  .legend-line {
    width: 16px;
    height: 2px;
  }

  .settings-modal__dialog {
    width: calc(100vw - calc(var(--spacing-unit) * 1.5));
    max-height: calc(100vh - calc(var(--spacing-unit) * 1.5));
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 0.75);
  }
}