/* ============================================
   BLADES
   Three-panel layout (Xbox 360 Blades effect)
   ============================================ */

.three-panel-layout {
  width: min(1200px, 96vw);
  height: min(800px, 65vh);
  background: linear-gradient(135deg, rgba(12, 18, 36, 0.95), rgba(8, 12, 24, 0.98));
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(39, 240, 156, 0.2);
  position: relative;
  overflow: hidden;
  margin: 0 auto;
  transition: width 560ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s ease, box-shadow 0.3s ease;
  will-change: width;
}

.three-panel-layout.panels-collapsed {
  width: calc(4 * var(--tabW));
}

.three-panel-header {
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 20px;
}

/* Stage container */
.stage {
  position: absolute;
  inset: 0;
  --panelW: calc(100% - (2 * var(--tabW)));
  --leftTabs: 1;
}

/* Blade = tab + panel */
.blade {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: calc(var(--panelW));
  display: inline-flex;
  transition: transform 560ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.3s ease;
  will-change: transform;
}

/* Tab styling */
.tab {
  width: var(--tabW);
  min-width: var(--tabW);
  writing-mode: vertical-lr;
  text-orientation: upright;
  user-select: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--fg);
  text-shadow: 2px 4px 4px rgba(0, 0, 0, 1.0), 0 0 8px rgba(255, 255, 255, 0.3);
  background: linear-gradient(180deg, var(--green-primary), var(--green-secondary));
  border-left: 1px solid var(--green-accent);
  box-shadow: inset 0 1px 0 var(--green-glow), 0 0 0 1px rgba(0, 0, 0, 0.2);
  cursor: pointer;
  transition: transform 0.3s ease-out, filter 0.3s ease, background 0.3s ease;
  will-change: transform, filter;
}

.blade:first-child .tab {
  border-radius: 16px 0 0 16px;
}

.blade:last-child .tab {
  border-radius: 0 16px 16px 0;
}

.tab:hover {
  filter: brightness(1.08);
  transform: translateX(2px);
}

.blade.next-wave .tab {
  background: linear-gradient(180deg, var(--red-primary), var(--red-secondary));
  box-shadow: inset 0 1px 0 var(--red-highlight), 0 0 0 1px rgba(0, 0, 0, 0.2);
  border-left-color: var(--red-accent);
}

/* Active tab styling */
.mode-earnings .blade.earnings .tab,
.mode-market .blade.market .tab,
.mode-upgrades .blade.upgrades .tab {
  background: linear-gradient(180deg, var(--green-accent), var(--green-secondary));
  box-shadow: inset 0 1px 0 var(--green-glow), 0 0 0 1px rgba(0, 0, 0, 0.33), 0 18px 30px rgba(10, 239, 94, 0.13);
  border-left-color: var(--green-highlight);
}

/* Inactive panel styling */
#market-content:not(.mode-earnings) .blade.earnings .panel,
#market-content:not(.mode-market) .blade.market .panel,
#market-content:not(.mode-upgrades) .blade.upgrades .panel {
  /* Reserved for future use */
}

/* Panel styling */
.panel {
  width: calc(var(--panelW));
  height: 100%;
  border-radius: 0;
  overflow: hidden;
  background: linear-gradient(135deg, rgb(4, 4, 24), rgb(8, 8, 32));
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding: 12px;
  padding-top: 0;
  overflow-y: auto;
  transition: opacity 0.3s ease, background 0.3s ease;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.panel::-webkit-scrollbar {
  width: 8px;
}

.panel::-webkit-scrollbar-track {
  background: transparent;
}

.panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.panel::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

.panel-placeholder {
  width: calc(var(--panelW));
  height: 100%;
}

/* ===== Blade positioning ===== */
.blade.earnings {
  transform: translateX(0);
}

.blade.market {
  transform: translateX(calc(var(--panelW) + (1 * var(--tabW))));
}

.blade.upgrades {
  transform: translateX(calc(var(--panelW) + (2 * var(--tabW))));
}

.blade.next-wave {
  transform: translateX(calc(var(--panelW) + (3 * var(--tabW))));
}

/* Mode-specific positioning */
.mode-earnings .stage {
  --leftTabs: 1;
}

.mode-market .stage {
  --leftTabs: 2;
}

.mode-upgrades .stage {
  --leftTabs: 3;
}

.mode-market .blade.market,
.mode-upgrades .blade.market {
  transform: translateX(var(--tabW));
}

.mode-upgrades .blade.upgrades {
  transform: translateX(calc(2 * var(--tabW)));
}

/* Expand animation fix */
.three-panel-layout.expanding .blade {
  transition: none !important;
}

/* Responsive tab width */
@media (max-width: 860px) {
  :root {
    --tabW: 56px;
  }
}

/* Panel content padding */
.upgrades .panel,
.earnings .panel {
  padding: 24px;
}

/* Upgrades panel specifics */
.upgrades .section-header {
  margin: 24px 0 12px 0;
  padding: 0;
  font-size: 16px;
  color: var(--fg);
  text-shadow: 1px 2px 2px rgba(0, 0, 0, 0.8);
  font-weight: 600;
  opacity: 0.8;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 8px;
}

.upgrades .section-header:first-child {
  margin-top: 0;
}

.upgrades .items {
  margin-bottom: 0;
}

.upgrades .item {
  cursor: default;
}

.upgrades .item:hover {
  transform: none;
  box-shadow: inset 0 1px 0 var(--blue-highlight), 0 0 0 1px rgba(0, 0, 0, 0.2);
}

.upgrades .item.empty {
  grid-column: 1 / -1;
  text-align: center;
  opacity: 0.6;
  font-style: italic;
  padding: 40px 20px;
  background: linear-gradient(135deg, rgba(128, 128, 128, 0.2), rgba(64, 64, 64, 0.2));
  border-left-color: rgba(128, 128, 128, 0.3);
}