/* Reset + App Shell */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-body-large);
}

/* App layout */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Top bar */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--md-sys-spacing-sm) var(--md-sys-spacing-md);
  background: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  flex-shrink: 0;
  z-index: 10;
}

.top-bar h1 {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
}

.top-bar .subtitle {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  margin-left: var(--md-sys-spacing-sm);
}

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-xl);
  padding: var(--md-sys-spacing-xs) var(--md-sys-spacing-md);
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  font: var(--md-sys-typescale-label-large);
  transition: background var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.theme-toggle:hover {
  background: var(--md-sys-color-surface-container-high);
}

/* Controls bar */
.controls-bar {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-md);
  padding: var(--md-sys-spacing-xs) var(--md-sys-spacing-md);
  background: var(--md-sys-color-surface-container-low);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  flex-shrink: 0;
  overflow: visible;
  z-index: 40;
}

.control-group {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-sm);
  flex-shrink: 0;
}

.control-label {
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-on-surface-variant);
  white-space: nowrap;
}

.control-select {
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-sm);
  padding: 4px 8px;
  font: var(--md-sys-typescale-label-large);
  cursor: pointer;
}

.control-select:focus {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 1px;
}

/* Control bar divider */
.control-divider {
  width: 1px;
  height: 24px;
  background: var(--md-sys-color-outline-variant);
  flex-shrink: 0;
}

/* Multi-select dropdown */
.multi-select {
  position: relative;
}

.multi-select-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-sm);
  padding: 4px 28px 4px 10px;
  font: var(--md-sys-typescale-label-large);
  cursor: pointer;
  white-space: nowrap;
  min-width: 100px;
  position: relative;
}

.multi-select-toggle:hover {
  border-color: var(--md-sys-color-on-surface-variant);
}

/* Dropdown arrow */
.multi-select-toggle::after {
  content: '';
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--md-sys-color-on-surface-variant);
}

.multi-select.open .multi-select-toggle::after {
  border-top: none;
  border-bottom: 5px solid var(--md-sys-color-on-surface-variant);
}

.multi-select.open .multi-select-toggle {
  border-color: var(--md-sys-color-primary);
}

.multi-select-summary {
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
}

.multi-select-panel {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-md);
  box-shadow: var(--md-sys-elevation-3);
  z-index: 50;
  min-width: 220px;
}

.multi-select.open .multi-select-panel {
  display: block;
}

/* Search input */
.multi-select-search {
  padding: 6px 8px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.multi-select-search-input {
  width: 100%;
  background: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-sm);
  padding: 5px 8px;
  font: var(--md-sys-typescale-body-medium);
  outline: none;
}

.multi-select-search-input:focus {
  border-color: var(--md-sys-color-primary);
}

.multi-select-search-input::placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

/* Options scrollable area */
.multi-select-options {
  max-height: 260px;
  overflow-y: auto;
}

.multi-select-actions {
  display: flex;
  gap: 2px;
  padding: 6px 8px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.multi-select-actions button {
  background: none;
  border: none;
  color: var(--md-sys-color-primary);
  font: var(--md-sys-typescale-label-large);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
}

.multi-select-actions button:hover {
  background: var(--md-sys-color-surface-container-highest);
}

.multi-select-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  user-select: none;
}

.multi-select-option:hover {
  background: var(--md-sys-color-surface-container-highest);
}

.multi-select-option input[type="checkbox"] {
  accent-color: var(--md-sys-color-primary);
  width: 16px;
  height: 16px;
  cursor: pointer;
  flex-shrink: 0;
}

.multi-select-option .swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.control-btn {
  background: none;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-sm);
  padding: 3px 10px;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  cursor: pointer;
  flex-shrink: 0;
}

.control-btn:hover {
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

/* Main content */
.main {
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* Timeline container */
.timeline-container {
  width: 100%;
  height: 100%;
  position: relative;
}

.timeline-container svg {
  width: 100%;
  height: 100%;
}

/* Mini navigation bar */
.mini-nav {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--md-sys-color-surface-container-high);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  z-index: 5;
}

.mini-nav svg {
  width: 100%;
  height: 100%;
}

.mini-nav .viewport-indicator {
  fill: var(--md-sys-color-primary);
  opacity: 0.2;
  stroke: var(--md-sys-color-primary);
  stroke-width: 1;
}

/* Mission detail card */
.mission-card {
  position: absolute;
  right: var(--md-sys-spacing-md);
  top: var(--md-sys-spacing-md);
  width: 320px;
  max-height: calc(100% - 80px);
  background: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-lg);
  box-shadow: var(--md-sys-elevation-3);
  padding: var(--md-sys-spacing-lg);
  z-index: 20;
  overflow-y: auto;
  transform: translateX(360px);
  transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

.mission-card.visible {
  transform: translateX(0);
}

.mission-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--md-sys-spacing-md);
}

.mission-card .mission-name {
  font: var(--md-sys-typescale-headline-medium);
  color: var(--md-sys-color-on-surface);
}

.mission-card .program-badge {
  display: inline-block;
  padding: var(--md-sys-spacing-xs) var(--md-sys-spacing-sm);
  border-radius: var(--md-sys-shape-sm);
  font: var(--md-sys-typescale-label-medium);
  color: #000;
}

.mission-card .close-btn {
  background: none;
  border: none;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
  padding: 4px;
}

.mission-card .detail-row {
  display: flex;
  justify-content: space-between;
  padding: var(--md-sys-spacing-xs) 0;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font: var(--md-sys-typescale-body-medium);
}

.mission-card .detail-row .label {
  color: var(--md-sys-color-on-surface-variant);
}

.mission-card .wiki-link {
  display: inline-block;
  margin-top: var(--md-sys-spacing-md);
  padding: var(--md-sys-spacing-sm) var(--md-sys-spacing-md);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: var(--md-sys-shape-xl);
  text-decoration: none;
  font: var(--md-sys-typescale-label-large);
}

.mission-card .wiki-link:hover {
  opacity: 0.9;
}

/* Tooltip */
.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
  padding: var(--md-sys-spacing-xs) var(--md-sys-spacing-sm);
  border-radius: var(--md-sys-shape-sm);
  font: var(--md-sys-typescale-body-small);
  box-shadow: var(--md-sys-elevation-2);
  z-index: 30;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

.tooltip.visible {
  opacity: 1;
}

/* Crosshair */
.crosshair {
  stroke: var(--md-sys-color-outline);
  stroke-width: 1;
  stroke-dasharray: 4 4;
  pointer-events: none;
}

/* Markers */
.milestone-marker {
  cursor: pointer;
}

.disaster-marker line {
  stroke: var(--md-sys-color-error);
  stroke-width: 1.5;
  opacity: 0.7;
}

/* Loading state */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface-variant);
}