@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
  --bg-space: #060913;
  --bg-panel: rgba(10, 15, 29, 0.72);
  --bg-control: rgba(16, 24, 44, 0.85);
  --bg-subpanel: rgba(8, 14, 28, 0.6);
  --accent: #38bdf8;
  --accent-glow: rgba(56, 189, 248, 0.28);
  --accent-active: #0284c7;
  --accent-hover: #7dd3fc;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-faint: #64748b;
  --text-highlight: #38bdf8;
  --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

/* Glassmorphic Panel */
.glass-panel {
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: none;
  outline: none;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  color: var(--text-main);
  z-index: 10;
}

/* Left-Arranged Scrollable Master Sidebar HUD - Canonical iOS Modal Spring */
.left-hud-sidebar,
.sidebar {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 310px;
  height: calc(100vh - 2rem);
  max-height: calc(100vh - 2rem);
  max-width: calc(100vw - 2rem);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  gap: 0.6rem;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.25) transparent;
  border-radius: 16px !important;
  transform-origin: 0 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  z-index: 10;
}

.left-hud-sidebar::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.left-hud-sidebar::-webkit-scrollbar-button,
.sidebar::-webkit-scrollbar-button {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

.left-hud-sidebar::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.3);
  border-radius: 4px;
}

.left-hud-sidebar::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

/* Inner elements container for staged iOS cross-fading */
.left-hud-sidebar .hud-title-row,
.left-hud-sidebar .hud-section,
.left-hud-sidebar .action-btn,
.left-hud-sidebar .seg-control,
.left-hud-sidebar .hud-header,
.sidebar .hud-title-row,
.sidebar .hud-section,
.sidebar .action-btn,
.sidebar .seg-control,
.sidebar .hud-header {
  transition: opacity 0.22s ease-out;
  opacity: 1;
  min-width: 272px;
  box-sizing: border-box;
  flex-shrink: 0;
}

.left-hud-sidebar .hud-top-actions > :not(#btn-collapse-hud):not([data-dismiss="sidebar"]),
.sidebar .hud-top-actions > :not(#btn-collapse-hud):not([data-dismiss="sidebar"]) {
  transition: opacity 0.22s ease-out;
  opacity: 1;
}

/* ── Animation State: Disable overflow slider & scrollbars to eliminate jank ── */
.left-hud-sidebar.animating,
.sidebar.animating {
  overflow: hidden !important;
  pointer-events: none !important;
  user-select: none !important;
}

.left-hud-sidebar.animating *,
.sidebar.animating * {
  pointer-events: none !important;
}

/* ── Collapsed Button State (2.75rem x 2.75rem pill) ── */
.left-hud-sidebar.collapsed,
.sidebar.collapsed {
  width: 2.75rem !important;
  height: 2.75rem !important;
  max-height: 2.75rem !important;
  padding: 0 !important;
  pointer-events: auto;
  cursor: pointer;
  border-radius: 16px !important;
  overflow: hidden !important;
  animation: none !important;
  transform: none !important;
  opacity: 0.5 !important;
  box-shadow: none !important;
  background: var(--bg-panel);
  transition:
    opacity 0.25s ease,
    box-shadow 0.25s ease,
    background 0.2s ease,
    transform 0.2s cubic-bezier(0.32, 0.72, 0, 1);
}

.left-hud-sidebar.collapsed:hover,
.sidebar.collapsed:hover {
  opacity: 1.0 !important;
  background: var(--bg-control);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5) !important;
  transform: none !important;
}

/* Content hidden immediately during collapse */
.left-hud-sidebar.collapsed .hud-title-row,
.left-hud-sidebar.collapsed .hud-section,
.left-hud-sidebar.collapsed .action-btn,
.left-hud-sidebar.collapsed .seg-control,
.left-hud-sidebar.collapsed .hud-group-title,
.sidebar.collapsed .hud-title-row,
.sidebar.collapsed .hud-section,
.sidebar.collapsed .action-btn,
.sidebar.collapsed .seg-control,
.sidebar.collapsed .hud-group-title {
  opacity: 0 !important;
  pointer-events: none;
  display: none !important;
}

/* Header collapses to fill entire button area */
.left-hud-sidebar.collapsed .hud-header,
.sidebar.collapsed .hud-header {
  padding: 0 !important;
  margin: 0 !important;
  border: none !important;
  gap: 0 !important;
  width: 100% !important;
  height: 100% !important;
  min-width: 0 !important;
  max-width: 100% !important;
  flex-shrink: 1 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

.left-hud-sidebar.collapsed .hud-top-actions,
.sidebar.collapsed .hud-top-actions {
  width: 100% !important;
  height: 100% !important;
  min-width: 0 !important;
  max-width: 100% !important;
  gap: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}

/* Hide all action buttons except the morph toggle button */
.left-hud-sidebar.collapsed .hud-top-actions > :not(#btn-collapse-hud):not([data-dismiss="sidebar"]),
.sidebar.collapsed .hud-top-actions > :not(#btn-collapse-hud):not([data-dismiss="sidebar"]) {
  display: none !important;
}

.left-hud-sidebar.collapsed #btn-collapse-hud,
.left-hud-sidebar.collapsed .hud-morph-btn,
.sidebar.collapsed #btn-collapse-hud,
.sidebar.collapsed .hud-morph-btn {
  width: 100% !important;
  height: 100% !important;
  min-width: 0 !important;
  max-width: 100% !important;
  border-radius: 16px !important;
  border: none !important;
  flex: unset !important;
  background: transparent !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  color: var(--accent) !important;
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  cursor: pointer !important;
  padding: 0 !important;
  margin: 0 !important;
}

/* ── Morph icon cross-fade ── */
.morph-icon-open,
.morph-icon-closed {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--text-muted);
  transition: opacity 0.15s ease, transform 0.15s ease;
  pointer-events: none;
}

.morph-icon-open svg,
.morph-icon-closed svg {
  display: block;
  stroke: currentColor;
}

/* Open state: show chevron, hide expand icon */
.morph-icon-open  { opacity: 1; transform: scale(1); visibility: visible; }
.morph-icon-closed { opacity: 0; transform: scale(0.6); visibility: hidden; }

/* Collapsed state: direct static rendering to guarantee full visibility */
.left-hud-sidebar.collapsed .morph-icon-open,
.sidebar.collapsed .morph-icon-open { display: none !important; }

.left-hud-sidebar.collapsed .morph-icon-closed,
.sidebar.collapsed .morph-icon-closed {
  position: static !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  opacity: 1 !important;
  visibility: visible !important;
  transform: none !important;
  color: var(--accent) !important;
  width: 100% !important;
  height: 100% !important;
}

.left-hud-sidebar.collapsed .morph-icon-closed svg,
.sidebar.collapsed .morph-icon-closed svg {
  display: block !important;
  visibility: visible !important;
  stroke: var(--accent) !important;
  color: var(--accent) !important;
  width: 20px !important;
  height: 20px !important;
}

/* The morph button needs relative positioning for absolute icon children */
#btn-collapse-hud,
.hud-morph-btn {
  position: relative;
}

/* HUD Header: Two Rows (Title on top, Buttons below) */
.hud-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.hud-title-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.3rem;
}

.hud-title {
  font-size: 1.08rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--text-main);
  text-transform: none;
}

.hud-top-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 0.35rem;
}

.hud-top-actions .icon-btn {
  flex: 1;
  min-width: 0;
  width: auto;
  height: 2.15rem;
}

/* Sidebar Group Category Header with In-Line Rule */
.hud-group-title {
  font-size: 0.76rem;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0.03em;
  color: var(--accent);
  margin-top: 0.45rem;
  margin-bottom: 0.1rem;
  padding-bottom: 0;
  border-bottom: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.hud-group-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.left-hud-sidebar .hud-group-title,
.sidebar .hud-group-title {
  transition: opacity 0.22s ease-out;
  opacity: 1;
  min-width: 272px;
  box-sizing: border-box;
  flex-shrink: 0;
}

/* Perfectly Centered Icon Buttons */
.icon-btn {
  background: var(--bg-subpanel);
  border: none;
  outline: none;
  color: var(--text-muted);
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1;
  font-size: 1.05rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, filter 0.1s ease;
  flex-shrink: 0;
}

.icon-btn i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  line-height: 1;
}

.icon-btn:hover {
  background: var(--bg-control);
  color: var(--text-main);
}

.icon-btn:active {
  filter: brightness(80%);
}

.icon-btn.active {
  background: var(--accent-active);
  color: #ffffff;
}

/* HUD Form Sections */
.hud-section {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex-shrink: 0;
}

.hud-section-label {
  font-size: 0.74rem;
  text-transform: none;
  letter-spacing: 0.01em;
  color: var(--text-faint);
  font-weight: 700;
}

/* Segmented Control Buttons & iOS Sliding Pill */
.seg-control {
  position: relative;
  display: flex;
  background: var(--bg-subpanel);
  padding: 3px;
  border-radius: 8px;
  gap: 2px;
}

.seg-indicator {
  position: absolute;
  top: 0;
  left: 0;
  background: var(--accent-active);
  border-radius: 6px;
  pointer-events: none;
  z-index: 1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  opacity: 0;
}

.seg-btn {
  position: relative;
  z-index: 2;
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-muted);
  padding: 0.38rem 0.35rem;
  font-size: 0.78rem;
  font-family: inherit;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  text-transform: none;
  transition: color 0.15s ease;
}

.seg-btn:hover {
  color: var(--text-main);
}

.seg-btn:active {
  filter: brightness(85%);
}

.seg-btn.active {
  color: #ffffff;
  font-weight: 600;
}

/* Styled Select Dropdown / Custom Select */
.select-styled,
.custom-select {
  width: 100%;
  background: var(--bg-subpanel);
  border: none;
  outline: none;
  color: var(--text-main);
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
}

.select-styled option,
.custom-select option {
  background: var(--bg-control);
  color: var(--text-main);
}

/* Stepper Select Rows */
.select-stepper-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  width: 100%;
}

.select-stepper-row .stepper-btn {
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.select-stepper-row .custom-select,
.select-stepper-row .select-styled {
  flex: 1;
  min-width: 0;
}

/* Sliders & Controls */
.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: none;
}

.range-slider,
.left-hud-sidebar input[type="range"],
.sidebar input[type="range"] {
  width: 100%;
  height: 5px;
  background: #334155; /* Solid lighter non-transparent track */
  border: none;
  outline: none;
  border-radius: 3px;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  margin-top: 0.2rem;
}

.range-slider::-webkit-slider-thumb,
.left-hud-sidebar input[type="range"]::-webkit-slider-thumb,
.sidebar input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}

.range-slider::-moz-range-track,
.left-hud-sidebar input[type="range"]::-moz-range-track,
.sidebar input[type="range"]::-moz-range-track {
  background: #334155;
  height: 5px;
  border-radius: 3px;
  border: none;
}

.range-slider::-moz-range-thumb,
.left-hud-sidebar input[type="range"]::-moz-range-thumb,
.sidebar input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

/* Toggle Switches */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: none;
}

.switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-round {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-control);
  transition: 0.2s;
  border-radius: 20px;
}

.slider-round:before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: #ffffff;
  transition: 0.2s;
  border-radius: 50%;
}

input:checked + .slider-round {
  background-color: var(--accent-active);
}

input:checked + .slider-round:before {
  transform: translateX(16px);
}

/* Action Primary Button & Action Button Groups */
.action-btn {
  width: 100%;
  background: var(--bg-subpanel);
  border: none;
  outline: none;
  color: var(--accent);
  padding: 0.55rem 1rem;
  font-size: 0.82rem;
  font-family: inherit;
  font-weight: 600;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  cursor: pointer;
  text-transform: none;
  transition: background 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.action-btn:hover {
  background: var(--accent);
  color: #070d09;
}

.action-btn:active {
  filter: brightness(85%);
}

.action-btn.primary {
  background: var(--accent-active);
  color: #ffffff;
}

.action-btn.primary:hover {
  background: var(--accent);
  color: #070d09;
}

.action-btn-group {
  display: flex;
  gap: 0.35rem;
  width: 100%;
}

.action-btn-group .action-btn {
  flex: 1;
  margin-top: 0;
}