/**
* Styles for the CGViz app.
*
* Known Issues: FIXME:
* - [ ] Hardcoded pixel sizes. Switch to relative units or viewport units.
* - [ ] Better responsiveness for smaller screens. There are just too many elements on the screen currently. Hard to optimize this.
* - [ ] Group together media rules by breakpoints. I wrote them per element / element-group and now, they are all over the place. Shouldn't affect functionality, but makes it harder to maintain.
* - [ ] ...
**/

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-color: #f5f5f5;
  --control-bg: #34495e;
  --control-color: white;
  --button-bg: #3498db;
  --button-hover: #2980b9;
  --button-disabled: #7f8c8d;
  --header-color: #ecf0f1;
  --text-color: #bdc3c7;
  --canvas-bg: white;
  --canvas-border: #34495e;
  --range-fill: #5ec1ff; /* accent for slider fill */
}

body.dark-mode {
  --bg-color: #121212;
  --control-bg: #2a2a2a;
  --control-color: #e0e0e0;
  --button-bg: #2196f3;
  --button-hover: #1976d2;
  --button-disabled: #616161;
  --header-color: #e0e0e0;
  --text-color: #b0b0b0;
  --canvas-bg: #1e1e1e;
  --canvas-border: #2a2a2a;
  --range-fill: #2aa6ff;
}

body {
  font-family: "Martian Mono", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  transition: background-color 0.3s ease;
}
/* Base font for the entire app */
html,
body,
#container {
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
  /* TODO: 95 looks good for now, but needs testing on HiDPI displays */
  font-size: 95%;
}

#container {
  display: flex;
  height: 100vh;
}

.control-group {
  margin-bottom: 20px;
}

.control-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}

.control-group select,
.control-group input[type="range"] {
  width: 100%;
  padding: 8px;
  border: none;
  border-radius: 4px;
  background-color: var(--control-bg);
  color: var(--control-color);
}

.control-group select {
  cursor: pointer;
}

.control-group button {
  width: 40px;
  height: 40px;
  background-color: var(--button-bg);
  color: var(--control-color);
  border: none;
  padding: 0;
  margin: 2px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.3s;
}

.control-group button:hover {
  background-color: var(--button-hover);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.control-group button:disabled {
  background-color: var(--button-disabled);
  cursor: not-allowed;
}

/* Controls Overlay */
.control-overlay {
  width: 85%;
  /* width: 98%; */
  /* width: auto; */
  position: fixed;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: center;
  background: rgba(12, 12, 12, 0.72);
  color: white;
  padding: 8px 14px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1200; /* sit above canvas controls */
  pointer-events: auto;
}

/* Keyboard shortcuts */
.keyboard-shortcuts {
  width: 100%;
  font-size: 105%;
  line-height: 1.36;
}
.keyboard-shortcuts h4 {
  font-size: 1.1em;
  margin-bottom: 8px;
  color: var(--header-color);
}
#keyboard-shortcuts-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Popover styles for Randomizer settings */
.popover {
  display: none;
  position: fixed;
  left: 50%;
  bottom: 80px;
  width: 380px;
  max-width: calc(100% - 32px);
  background: rgba(10, 10, 10, 0.96);
  color: #e6eef8;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  border-radius: 10px;
  z-index: 1400;

  /* Popover open/close animation (desktop) and bottom-sheet slide-up (mobile) */
  opacity: 0;
  transform: translateY(8px) scale(0.995);
  transition: opacity 180ms ease, transform 220ms cubic-bezier(0.2, 0.9, 0.3, 1);
  will-change: opacity, transform;
}

.popover[aria-hidden="false"] {
  display: block;
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Mobile bottom-sheet: slide from below */
@media (max-width: 640px) {
  .popover {
    transform: translateY(100%);
    transition: transform 260ms cubic-bezier(0.2, 0.95, 0.28, 1),
      opacity 220ms ease;
  }
  .popover[aria-hidden="false"] {
    transform: translateY(0);
    box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.6);
  }
}

/* Focus styles inside popover */
.popover :is(button, a, input, select, textarea):focus {
  outline: 3px solid rgba(52, 152, 219, 0.35);
  outline-offset: 2px;
}
.popover-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

/* Sleek global range (slider) styling */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 10px;
  /* NOTE: Layered background: first layer is the progress fill, second is the
    track. background-size uses --range-percent so it can be transitioned. */
  background-image: linear-gradient(to right, var(--range-fill) 0 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.04));
  background-size: var(--range-percent, 0%) 100%, 100% 100%;
  background-repeat: no-repeat;
  border-radius: 999px;
  outline: none;
  transition: background-size 220ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

/* Webkit track */
input[type="range"]::-webkit-slider-runnable-track {
  height: 10px;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 999px;
}

/* Webkit thumb */
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--button-bg);
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transform: translateY(2px);
  transition: transform 160ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

/* Firefox */
input[type="range"]::-moz-range-track {
  height: 10px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 999px;
}
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--button-bg);
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.25);
  transform: translateY(2px);
  transition: transform 160ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

/* Focus and hover states */
input[type="range"]:focus::-webkit-slider-thumb,
input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"]:focus::-moz-range-thumb,
input[type="range"]:hover::-moz-range-thumb {
  transform: translateY(-1px) scale(1.05);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.28);
}
input[type="range"]:focus {
  outline: none;
  box-shadow: 0 0 0 6px rgba(52, 152, 219, 0.08);
}

/* Dark mode tweaks for range */
body.dark-mode input[type="range"]::-webkit-slider-thumb,
body.dark-mode input[type="range"]::-moz-range-thumb {
  border: 2px solid rgba(0, 0, 0, 0.6);
  background: var(--button-bg);
}

/* Popover-specific */
.popover.popover-randomize input[type="range"] {
  height: 8px;
  background-image: linear-gradient(to right, var(--range-fill) 0 100%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.02));
  background-size: var(--range-percent, 0%) 100%, 100% 100%;
  background-repeat: no-repeat;
  transition: background-size 220ms cubic-bezier(0.2, 0.9, 0.3, 1);
}
.popover.popover-randomize input[type="range"]::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -3px;
  border: 2px solid rgba(255, 255, 255, 0.06);
}

/* Ensures native select elements are readable in both light and dark themes */
select,
.control-group-randomize select,
.popover select,
.popover.popover-randomize select,
select:focus {
  background-color: var(--control-bg);
  color: var(--control-color);
  border: 1px solid rgba(0, 0, 0, 0.12);
  outline: none;
  /* Ensures selects use Martian Mono when available */
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Light mode: make dropdown option text slightly darker */
body:not(.dark-mode) select option,
body:not(.dark-mode) .control-group select option,
body:not(.dark-mode) .popover select option {
  color: #2b2b2b;
  background-color: var(--canvas-bg);
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
}

select option,
.popover select option,
.control-group select option {
  background-color: var(--canvas-bg);
  color: var(--text-color);
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
}

/* Main algorithm select dropdown */
#algorithm-select {
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: box-shadow 160ms ease, border-color 160ms ease,
    transform 120ms ease;
}

#algorithm-select:focus {
  outline: none;
  border-color: rgba(94, 192, 255, 0.9);
  box-shadow: 0 6px 18px rgba(94, 192, 255, 0.12),
    0 0 0 6px rgba(94, 192, 255, 0.06);
  transform: translateY(-1px);
}

/* Dark mode adjustments for selects/options */
body.dark-mode select,
body.dark-mode .control-group select,
body.dark-mode .popover select {
  background-color: var(--control-bg);
  color: var(--control-color);
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
}
body.dark-mode select option,
body.dark-mode .popover select option {
  background-color: var(--control-bg);
  color: var(--control-color);
  font-family: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    "Roboto Mono", "Courier New", monospace;
}

/* Custom appearance to ensure arrow is visible on dark backgrounds */
select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: linear-gradient(
      45deg,
      transparent 50%,
      var(--control-color) 50%
    ),
    linear-gradient(135deg, var(--control-color) 50%, transparent 50%),
    linear-gradient(to right, rgba(0, 0, 0, 0.06), rgba(0, 0, 0, 0.06));
  background-position: calc(100% - 18px) calc(1em + 2px),
    calc(100% - 13px) calc(1em + 2px), 100% 0;
  background-size: 6px 6px, 6px 6px, 1px 1.5em;
  background-repeat: no-repeat;
}

.control-group select::-ms-expand {
  display: none; /* hide default arrow in IE/Edge */
}

/* Randomizer popover */
.popover.popover-randomize {
  width: 420px;
  max-width: calc(100% - 32px);
  right: 20px;
  bottom: 90px;
  background: linear-gradient(
    180deg,
    rgba(12, 12, 12, 0.96),
    rgba(6, 6, 6, 0.96)
  );
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);

  padding: 0;
  z-index: 1400;
  pointer-events: auto;
}

/* Popover header */
.popover.popover-randomize .popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  font-weight: 700;
  color: var(--header-color, #e6eef8);
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 14px 14px 0 0;
}

/* Close button (×) */
.popover.popover-randomize .popover-close,
.popover.popover-randomize .popover-close:focus {
  background: transparent;
  border: none;
  color: #cfe6ff;
  font-size: 18px;
  line-height: 1;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 8px;
}
.popover.popover-randomize .popover-close:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Styles for dynamically added control elements */
#rand-dynamic-options {
  display: grid;
  gap: 18px;
}

/* Popover body */
.popover-body {
  padding: 12px;
  display: grid;
  gap: 18px;
}

.popover.popover-randomize .control-group-randomize {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: stretch;
}

.control-group-randomize-buttons {
  margin-top: 16px;
}

/* Layout for the Point count row: label left, value right, slider full-width below */
.popover.popover-randomize .count-row {
  gap: 4px;
}
.popover.popover-randomize .count-row-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px;
}
.popover.popover-randomize .count-row-header label {
  margin: 0; /* Ensures label doesn't add extra spacing */
}
.popover.popover-randomize #rand-count {
  width: 100%;
  margin-top: 2px;
}

.popover.popover-randomize label {
  font-size: 13px;
  color: var(--label-color, #dfe9f8);
  text-align: left;
  font-weight: 600;
}

/* Randomizer Inputs/selects */
.popover.popover-randomize select,
.popover.popover-randomize input[type="number"],
.popover.popover-randomize input[type="text"] {
  padding: 8px 10px;
  background: rgba(255, 255, 255, 0.02);
  color: #e6eef8;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  outline: none;
  width: 100%;
  box-sizing: border-box;
}
.popover.popover-randomize input[type="range"] {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 8px;
  /* Left-right tabs */
  background-image: linear-gradient(to right, var(--range-fill) 0 100%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  background-size: var(--range-percent, 0%) 100%, 100% 100%;
  background-repeat: no-repeat;
  border-radius: 6px;
}

.popover.popover-randomize input[type="range"]::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--button-bg);
  border: 2px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.28);
}

.popover.popover-randomize .control-apply {
  min-width: 84px;
  padding: 8px 12px;
  font-weight: 700;
  background: linear-gradient(
    180deg,
    var(--button-bg),
    color-mix(in srgb, var(--button-bg) 88%, black 12%)
  );
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(12, 90, 160, 0.12);
}

.popover.popover-randomize .control-cancel {
  min-width: 84px;
  padding: 8px 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
  color: #d6dee8;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  cursor: pointer;
}

/* Split-button (small action + chevron) inside overlay */
.split-button {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
}
.split-button > button {
  background: transparent;
  border: none;
  color: var(--control-color, #e6eef8);
  padding: 8px 10px;
  cursor: pointer;
}
.split-button > .split-toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
  transition: transform 160ms ease;
}

/* Mobile */
@media (max-width: 640px) {
  .popover.popover-randomize {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    border-radius: 12px 12px 0 0;
    max-height: 60vh;
    overflow-y: auto;
  }
}

.popover.popover-randomize .control-cancel {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #cbd6e6;
}
.popover.popover-randomize .control-apply {
  background: var(--button-bg);
  color: white;
  border: none;
}
.popover .control-apply {
  background: var(--button-bg);
  color: white;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
}
.popover .control-cancel {
  background: transparent;
  color: #cbd6e6;
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 8px 12px;
  border-radius: 6px;
}

/* Responsive: on small screens transform popover into a bottom-sheet */
@media (max-width: 640px) {
  .popover {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    border-radius: 12px 12px 0 0;
    max-height: 60vh;
    overflow-y: auto;
  }

  .popover.popover-randomize {
    width: 100%;
    right: 0;
    bottom: 0;
    border-radius: 12px 12px 0 0;
    padding: 8px 10px 14px 10px;
  }

  /* Stack apply/cancel on small screens */
  .popover.popover-randomize .controls-row {
    flex-direction: column-reverse;
    gap: 8px;
    align-items: stretch;
  }

  .control-overlay {
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    padding: 8px;
    gap: 6px;
  }
}

/* Ensures the overlays and all its child controls capture pointer/touch events,
   so that, the interactions over the panel do not fall through to the canvas below. */
.control-overlay,
.control-overlay * {
  pointer-events: auto;
  -webkit-user-select: none;
  user-select: none;
}
.control-overlay button,
.control-overlay select,
.control-overlay input,
.control-overlay .collapsible-content {
  touch-action: auto;
}
#top-left-overlays,
.panel-overlay,
.panel-overlay * {
  pointer-events: auto;
  -webkit-user-select: none;
  user-select: none;
}
.panel-overlay .collapsible-content {
  touch-action: auto; /* allow touch scrolling inside panel bodies */
}

.control-overlay .control-group {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  padding: 0;
}

.control-overlay .control-group label,
.control-overlay .control-group select,
.control-overlay .control-group input,
.control-overlay .control-group button {
  background: transparent;
  color: inherit;
  border-radius: 6px;
}

.control-overlay .control-group select,
.control-overlay .control-group input[type="range"] {
  width: auto;
  min-width: 120px;
  padding: 6px 8px;
  background-color: rgba(255, 255, 255, 0.06);
}

.collapsible-header {
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: color 0.3s;
}

.collapsible-header:hover {
  color: #3498db;
}

.collapsible-content {
  max-height: 300px;
  overflow-y: auto;
  transition: max-height 0.3s ease-out;
  margin-top: 10px;
}

.collapsible-content.collapsed {
  max-height: 0;
  overflow: hidden;
  margin-top: 0;
}

/* Algorithm steps & events styles */
#algorithm-steps-panel-body.collapsible-content {
  padding: 0px 20px;
}

#steps-list {
  padding-left: 20px;
  color: #bdc3c7;
  font-size: 0.85em;
}

#steps-list li {
  margin-bottom: 8px;
  padding: 4px 8px;
  border-radius: 3px;
  transition: background-color 0.3s;
}

#steps-list li.current-step {
  background-color: #3498db;
  color: white;
  font-weight: bold;
}

#steps-list li.completed-step {
  background-color: #27ae60;
  color: white;
}

#steps-list li.backtrack-step {
  background-color: #9b59b6;
  color: white;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
  100% {
    opacity: 1;
  }
}

#event-sets-content {
  font-size: 0.8em;
  color: #bdc3c7;
}

.event-group {
  margin-bottom: 15px;
  padding: 8px;
  background-color: #34495e;
  border-radius: 4px;
}

.event-group h4 {
  color: #ecf0f1;
  margin-bottom: 8px;
  font-size: 0.9em;
}

.event-list {
  list-style: none;
  padding: 0;
}

.event-list li {
  padding: 2px 0;
  border-bottom: 1px solid #2c3e50;
}

.event-list li:last-child {
  border-bottom: none;
}

.event-processed {
  color: #27ae60;
}

.event-accepted {
  color: #27ae60;
  font-weight: bold;
}

.event-rejected {
  color: #e74c3c;
  text-decoration: line-through;
  font-style: italic;
}

.event-current {
  color: #f39c12;
  font-weight: bold;
  background-color: rgba(243, 156, 18, 0.2);
  padding: 2px 4px;
  border-radius: 2px;
}

.event-pending {
  color: #bdc3c7;
}

.event-backtrack {
  color: #9b59b6;
  font-weight: bold;
  background-color: rgba(155, 89, 182, 0.2);
  padding: 2px 4px;
  border-radius: 2px;
}

.event-list li {
  padding: 4px 8px;
  margin: 2px 0;
  border-radius: 3px;
  transition: all 0.3s ease;
}

.event-list li:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.event-group {
  border-left: 3px solid #3498db;
  transition: border-color 0.3s ease;
}

.event-group:hover {
  border-left-color: #f39c12;
}

/* Canvas styles */
#canvas-container {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--canvas-bg);
  transition: background-color 0.3s ease;
  position: relative;
  overflow: hidden;
  padding: 0;
}

canvas {
  border: 2px dashed var(--canvas-border);
  border-radius: 4px;
  margin: 0;
  padding: 0;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
body.dark-mode canvas {
  border-color: rgba(255, 255, 255, 0.06);
  border-color: var(--canvas-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.02),
    0 6px 18px rgba(0, 0, 0, 0.6);
}

/* Use color-mix, when supported, for improved contrast in dark mode */
@supports (color-mix(in srgb, var(--canvas-border) 70%, white 30%)) {
  body.dark-mode canvas {
    border-color: color-mix(in srgb, var(--canvas-border) 70%, white 30%);
  }
}

#fps-counter {
  position: absolute;
  top: 60px;
  right: 10px;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 5px 10px;
  border-radius: 3px;
  font-size: 12px;
  display: none;
  z-index: 1000;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
}

.control-group #export-format {
  width: 60%;
  display: inline-block;
  margin-right: 5px;
}

.stats-container {
  position: absolute;
  top: 10px;
  left: 50%;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 5px 10px;
  border-radius: 3px;
  font-size: 12px;
  display: none;
  z-index: 1000;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
}

.canvas-controls {
  position: absolute;
  top: 10px;
  right: 10px;
  display: flex;
  gap: 5px;
  z-index: 1000;
  pointer-events: auto;
}

.canvas-controls button {
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
  pointer-events: auto;
  -webkit-user-select: none;
  user-select: none;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Toggle-style icon controls (Dark mode / FPS) */
.control-toggle-group {
  display: flex;
  gap: 6px;
  align-items: center;
}

.control-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.12s ease,
    background-color 0.12s ease;
}

.control-toggle input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  overflow: hidden;
}

.control-toggle .control-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

/* Duality toggle icon */
.control-toggle:has(.control-icon.control-duality) {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
}

.control-toggle:has(.control-icon.control-duality):hover {
  transform: none;
  box-shadow: none;
}

.control-icon.control-duality i,
.control-icon.control-duality svg {
  width: 20px;
  height: 20px;
  line-height: 20px;
  display: block;
}

.control-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.45);
}

/* Active (checked) visuals: color the icon background and stroke */
.control-toggle input:checked + .control-icon {
  background-color: var(--button-bg, #3498db);
  color: white;
  border-radius: 4px;
  padding: 3px;
}

/* Instructions panel styling */
.instructions-panel {
  position: absolute;
  right: 10px;
  top: 58px;
  width: 560px;
  background-color: rgba(10, 10, 10, 0.94);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 18px;
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.45);
  z-index: 1150;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transform-origin: right bottom;
  opacity: 0;
  transform: scale(0.98) translateY(6px);
  transition: opacity 180ms ease, transform 180ms cubic-bezier(0.2, 0.9, 0.3, 1);
  will-change: opacity, transform;
  visibility: hidden;
  line-height: 1.5;
}

/* Top-left stacked overlays for algorithm steps and event sets */
#top-left-overlays {
  /* Fixed so panels remain over canvas */
  position: fixed;
  top: 10px;
  left: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1300;
  pointer-events: auto;
}

.panel-overlay {
  width: 360px;
  max-height: 420px;
  background: rgba(10, 10, 10, 0.92);
  color: #e6eef8;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px;
  cursor: pointer;
  font-weight: 600;
  background: linear-gradient(0deg, rgba(255, 255, 255, 0.01), transparent);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

/* Accessible panel toggle button */
.panel-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: transparent;
  border: none;
  color: inherit;
  padding: 6px 8px;
  cursor: pointer;
  font: inherit;
}

.panel-toggle:focus {
  outline: 3px solid rgba(52, 152, 219, 0.35);
  outline-offset: 2px;
  border-radius: 6px;
}

.panel-title {
  font-size: 16px;
  text-align: left;
}

.panel-overlay .collapsible-content {
  padding: 8px 10px;
  max-height: 380px;
  overflow-y: auto;
  transition: max-height 220ms ease;
}

/* Duality Legend specific layout */
#duality-legend .collapsible-content {
  padding: 0 14px;
}

#duality-legend .legend-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  line-height: 1.25;
  color: inherit;
  margin-bottom: 10px;
}

#duality-legend .legend-header-text {
  font-size: 12px;
  color: var(--text-color);
  opacity: 0.95;
  margin-bottom: 4px;
}

#duality-legend .legend-icon {
  width: 14px;
  height: 14px;
  vertical-align: -2px;
  margin: 0 6px;
}

#duality-legend .legend-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

#duality-legend .legend-marker {
  flex: 0 0 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#duality-legend .marker-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

#duality-legend .marker-line {
  width: 26px;
  height: 0;
  border-top: 3px solid currentColor;
  display: inline-block;
}

#duality-legend .marker-line.dashed {
  border-top-style: dashed;
}

#duality-legend .legend-label {
  font-size: 13px;
  color: inherit;
}

.panel-overlay .collapsible-content.collapsed {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.panel-overlay ol#steps-list {
  padding-left: 18px;
  margin: 0;
}

#step-log-content {
  scroll-behavior: smooth;
  padding-bottom: 0.5rem;
}

#step-log-content .step-entry:last-child {
  /* To ensure the last step entry avoids clipping */
  margin-bottom: 1rem;
}

/* To keep Step Log header outside the scrollable area and prevent 
header compression during content updates/scrolls. */
#step-log-panel .panel-header {
  flex-shrink: 0;
  min-height: 40px;
  display: flex;
  align-items: center;
  padding: 4px;
}

#step-log {
  overflow-y: auto;
  padding-bottom: 1.5rem; /* ensures last entry isn't cut off */
  padding: 0;
}

/* Enable momentum scrolling on iOS Safari only (applied when supported) */
@supports (-webkit-overflow-scrolling: touch) {
  #step-log {
    -webkit-overflow-scrolling: touch;
  }
}

/* Reserve scrollbar gutter space on supporting browsers */
@supports (scrollbar-gutter: stable) {
  #step-log {
    scrollbar-gutter: stable both-edges;
  }
}

#step-log-panel {
  display: flex;
  flex-direction: column;
}

#step-log-panel .collapsible-content {
  flex: 1 1 auto;
  max-height: none;
}

#step-log-panel .collapsible-content.collapsed {
  flex: 0 0 auto;
  max-height: 0;
  overflow: hidden;
}

#step-log-panel .panel-header {
  position: relative;
  z-index: 2;
}
.instructions-sep {
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin: 10px 0;
}
.instructions-panel.open {
  opacity: 1;
  transform: scale(1) translateY(0);
  visibility: visible;
}
.instructions-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.instructions-panel-header button {
  background: transparent;
  border: none;
  font-size: 16px;
  cursor: pointer;
  color: #cbc4c4;
  padding: 4px 6px;
}
.instructions-panel-body {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 12px;
  color: #e6eef8;
}
.instructions-list {
  flex: 1 1 55%;
}
.instructions-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.instructions-list li {
  padding: 3px 3px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.03);
  margin-bottom: 0px;
  font-size: 13px;
}
.instructions-list li strong {
  width: 160px;
  display: inline-block;
}
.algorithm-info {
  flex: 0 0 45%;
  background: rgba(0, 0, 0, 0.03);
  padding: 8px;
  border-radius: 6px;
  font-size: 13px;
}
.algorithm-info h4 {
  margin: 0 0 6px 0;
  font-size: 13px;
}
/* Styles for the Resources block displayed under algorithm info */
.algorithm-info-resources {
  flex: 0 0 100%;
  background: rgba(0, 0, 0, 0.03);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-color, #e6eef8);
}
.algorithm-info-resources-list {
  margin: 0;
  padding-left: 12px; /* reserve space for list-numbering */
  color: #bdc3c7;
}
.algorithm-info-resources-list li {
  margin: 6px 0;
  font-size: 12px;
  color: #bdc3c7;
  margin-left: 8px; /* small left offset for visual separation */
}
.algorithm-info-resource-item a,
.algorithm-info-resources-list a {
  color: #3498db;
  text-decoration: underline;
}
.algorithm-info-resource-item a:hover,
.algorithm-info-resources-list a:hover {
  color: #f39c12;
}

.instructions-container {
  position: absolute;
  bottom: 10px;
  left: 10px;
  right: 10px;
  background-color: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 12px;
  z-index: 1000;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.instructions-content {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.instructions-content strong {
  color: #f39c12;
  white-space: nowrap;
}

/* Small screen adjustment */
@media (max-width: 640px) {
  .instructions-panel {
    width: calc(100% - 20px);
    top: 10px;
    z-index: 1600;
  }
  .instructions-panel-body {
    flex-direction: column;
  }
  .instructions-list li strong {
    display: block;
    width: auto;
    margin-bottom: 4px;
  }
}

/* Randomize controls */
#randomize-controls .rand-row-inline {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

#randomize-settings {
  margin-top: 8px;
  display: grid;
  gap: 6px;
  grid-template-columns: 1fr;
}

#duality-toggle-container.hidden {
  display: none;
}

.canvas-controls button:hover {
  background-color: rgba(0, 0, 0, 1);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

.canvas-controls button:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.duality-controls {
  position: absolute;
  top: 60px;
  right: 10px;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 10px;
  border-radius: 4px;
  z-index: 1000;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.duality-toggles {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.duality-toggles label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}

.duality-toggles input[type="checkbox"] {
  margin: 0;
  cursor: pointer;
}

.step-entry {
  padding: 8px 12px;
  margin: 4px 0;
  border-radius: 4px;
  border-left: 3px solid #3498db;
  background-color: rgba(52, 73, 94, 0.3);
  font-size: 0.9em;
  line-height: 1.4;
  transition: all 0.3s ease;
}

.step-entry.current-step {
  background-color: rgba(52, 152, 219, 0.3);
  border-left-color: #f39c12;
  font-weight: bold;
}

.step-entry:hover {
  background-color: rgba(52, 73, 94, 0.5);
}

/* Info button */
button#info-btn {
  border: 1.75px dashed rgba(212, 175, 55, 0.9);
  padding: 6px;
  width: 40px;
  height: 40px;
  border-radius: 6px;
}

button#info-btn:hover,
#github-btn:hover {
  background-color: rgba(212, 175, 55, 0.1);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* GitHub button (<a>) */
#github-btn {
  border: 1.75px dashed rgba(212, 175, 55, 0.9);
  border-radius: 6px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  background: transparent;
}
#github-btn svg {
  display: block;
  color: white;
}
#github-btn:hover,
#github-btn:focus-within {
  background-color: rgba(212, 175, 55, 0.08);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}
#github-btn .icon-button:focus {
  outline: 3px solid rgba(212, 175, 55, 0.18);
  outline-offset: 2px;
  border-radius: 6px;
}

.control-overlay .step-info-container {
  /* Full-width first row */
  background: rgba(14, 14, 14, 0.6);
  color: var(--header-color, #fff);
  border-radius: 12px;
  position: static;
  display: flex;
  align-items: center;
  flex-basis: 100%;
  width: 100%;
  margin: 0;
  padding: 8px 12px; /* inner padding to match controls */
  font-size: 12px;
  z-index: 1000;
  /* Ensures the overlay area itself captures pointer events so they do NOT fall
     through to the underlying canvas. Interactive child controls (buttons,
     inputs) already have pointer-events:auto via other rules. */
  pointer-events: auto;
  -webkit-user-select: none;
  user-select: none;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.step-info-content {
  display: flex;
  flex-wrap: nowrap;
  gap: 12px;
  align-items: center;
  width: 100%;
  border: none;
}

.step-info-content strong {
  color: #3498db;
  white-space: nowrap;
}

/* Truncate long step text with ellipsis to keep controls aligned */
#step-info {
  display: inline-block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  /* leave room for label + padding */
  /* max-width: calc(100% - 140px); */
  max-width: 100%;
}

.canvas-tooltip {
  position: absolute;
  background-color: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-family: "Courier New", monospace;
  z-index: 1001;
  pointer-events: none;
  -webkit-user-select: none;
  user-select: none;
  white-space: nowrap;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Responsive design */
@media (max-width: 768px) {
  #container {
    flex-direction: column;
  }
  #canvas-container {
    border-left: none;
    border-top: 2px solid #34495e;
  }

  .instructions-container,
  .step-info-container {
    font-size: 11px;
    padding: 6px 10px;
  }

  .instructions-content,
  .step-info-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

/* Focus Canvas/EyeOff: hide overlays & panels to leave only canvas + canvas-controls visible */
body.focus-canvas {
  /* marker property so the ruleset is not empty */
  --focus-canvas-active: 1;
}
/* Focus Canvas/EyeOff: hide control overlays, top-right overlays, instructions panel, and other UI chrome */
body.focus-canvas .control-overlay,
body.focus-canvas .panel-overlay,
body.focus-canvas .instructions-panel,
body.focus-canvas #top-left-overlays,
body.focus-canvas #canvas-tooltip,
body.focus-canvas .stats-container,
body.focus-canvas .popover,
body.focus-canvas .duality-controls,
body.focus-canvas .instructions-container {
  display: none !important;
}
body.focus-canvas .canvas-controls .control-toggle-group,
body.focus-canvas #reset-view-btn,
body.focus-canvas #zoom-in-btn,
body.focus-canvas #zoom-out-btn,
body.focus-canvas #focus-canvas-btn,
body.focus-canvas #fps-counter,
body.focus-canvas #canvas-controls #fps-toggle,
body.focus-canvas #canvas-controls .control-toggle {
  pointer-events: auto !important;
  visibility: visible !important;
  opacity: 1 !important;
}

/* Ensures the control-toggle group keeps its flex layout in focus mode */
body.focus-canvas .canvas-controls .control-toggle-group {
  display: flex !important;
  gap: 6px !important;
  align-items: center !important;
}

/* Ensures the fps counter is visible, if present */
body.focus-canvas #fps-counter {
  visibility: visible !important;
  opacity: 1 !important;
  pointer-events: auto !important;
}

/* Keep canvas-controls visible, but ensure it's on top */
body.focus-canvas .canvas-controls {
  position: absolute;
  right: 10px;
  top: 10px;
  z-index: 2000;
}

/* Focus icon active visuals: swap eye / eye-off */
.control-focus .lucide-eye-off {
  display: none;
}
body.focus-canvas .control-focus .lucide-eye {
  display: none;
}
body.focus-canvas .control-focus .lucide-eye-off {
  display: inline;
}

/* Prevent user interaction with the canvas while in focus mode, but allow animations/draw loop to continue.
   We intentionally keep `pointer-events: none` on the canvas element, so that, the mouse/touch/wheel don't reach it.
   The canvas-controls remain interactive (`pointer-events: auto`), so that, the user can toggle focus off. */
body.focus-canvas #canvas-container canvas {
  pointer-events: none !important;
  touch-action: none !important; /* prevents touch gestures */
}

/* Also, disable scrolling on the canvas container to prevent wheel events from affecting it */
body.focus-canvas #canvas-container {
  pointer-events: auto; /* Allows the controls overlay inside container to still receive events */
}

/* Mobile tweaks: Makes #top-left-overlays part of the page flow so users can scroll to them */
@media (max-width: 640px) {
  /* Main #container flows vertically (allows page scrolling) */
  #container {
    height: auto;
    min-height: 100vh;
    flex-direction: column;
  }

  /* #canvas-container takes natural height, so that, the page can scroll */
  #canvas-container {
    width: 100%;
    min-height: 56vh;
    height: auto;
    overflow: visible;
    padding-bottom: 8px;
  }

  .stats-container {
    left: 10px;
    padding: 6px 10px;
    border-radius: 6px;
  }

  #top-left-overlays {
    position: static;
    display: block;
    width: 100%;
    max-height: none;
    overflow: visible;
    padding: 0;
    margin: 12px 0 0;
    z-index: 1100;
  }
  #top-left-overlays .panel-overlay {
    width: 100%;
    max-width: none;
    margin-bottom: 10px;
  }

  .control-overlay {
    position: static;
    width: 100%;
    transform: none;
    display: flex;
    flex-direction: row;
    gap: 10px;
    align-items: center;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(8, 8, 10, 0.86);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.45);
    z-index: 1500; /* local stacking inside sheet */
  }
  .control-overlay .control-group {
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    flex-wrap: wrap;
  }
  .control-overlay .control-group select,
  .control-overlay .control-group input[type="range"] {
    flex: 1 1 auto;
    min-width: 80px;
  }

  .mobile-bottom-sheet {
    position: fixed;
    left: 2dvw;
    right: 2dvw;
    bottom: 2dvh;
    display: block;
    width: calc(100dvw - 4dvw);
    height: 23.25dvh; /* NOTE: If changing, also edit controls.js */
    max-height: 72dvh; /* NOTE: If changing, also edit controls.js */
    overflow-y: auto;
    padding: 8px;
    padding-top: 0;
    border-radius: 14px;
    background: linear-gradient(
      180deg,
      rgba(8, 8, 10, 0.6),
      rgba(6, 6, 8, 0.56)
    );
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
    z-index: 1400;
    transition: height 240ms cubic-bezier(0.2, 0.9, 0.2, 1),
      transform 200ms ease;
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
  }

  .mobile-bottom-sheet .sheet-content {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    touch-action: pan-y;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  #step-log-panel .collapsible-content {
    font-size: 12px;
    padding: 0 8px;
  }

  /* Expanded state */
  .mobile-bottom-sheet.expanded {
    height: 72dvh;
  }

  /* Prevent the body/page from scrolling, while the sheet is active */
  body.mobile-sheet-active {
    overflow: hidden;
    height: 100dvh;
  }

  body.mobile-sheet-active #canvas-container {
    /* Ensures canvas remains full-viewport beneath the sheet */
    position: relative;
    z-index: 1;
    /* Prevent gestures from reaching the canvas, while sheet is active */
    touch-action: none;
  }

  .mobile-bottom-sheet .panel-overlay,
  .mobile-bottom-sheet .control-overlay {
    background: rgba(10, 10, 12, 0.48);
    border: 1px solid rgba(255, 255, 255, 0.03);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
  }

  /* Sheet header: small handle + sheet control buttons */
  .mobile-bottom-sheet .sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 8px;
    cursor: grab;
    touch-action: manipulation;
  }
  .mobile-bottom-sheet .sheet-handle {
    width: 56px;
    height: 6px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.3);
    margin-right: 8px;
  }
  .mobile-bottom-sheet .sheet-header-buttons {
    display: flex;
    gap: 8px;
    align-items: center;
  }
  .mobile-bottom-sheet .sheet-header button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: none;
    background: rgba(255, 255, 255, 0.03);
    color: white;
    font-size: 16px;
    cursor: pointer;
  }
  /* Toggle icon rotation */
  .mobile-bottom-sheet .sheet-header .toggle-icon {
    display: inline-block;
    transition: transform 240ms cubic-bezier(0.2, 0.9, 0.2, 1);
    transform-origin: center;
  }
  .mobile-bottom-sheet .sheet-header .toggle-icon.rotated {
    transform: rotate(180deg);
  }
  .mobile-bottom-sheet .sheet-header button:focus {
    outline: 2px solid rgba(100, 150, 255, 0.9);
    outline-offset: 2px;
  }

  #algorithm-select {
    width: 120px;
    min-width: 100px;
  }

  /* Ensure popovers keep mobile bottom-sheet behavior */
  .popover.popover-randomize {
    bottom: -140px;
    width: 100%;
    border-radius: 12px 12px 0 0;
    max-height: 60vh;
    overflow-y: auto;
    z-index: 1500;
  }

  /* When focus-canvas is active on mobile, hide the whole bottom sheet. */
  body.focus-canvas .mobile-bottom-sheet {
    display: none !important;
  }
}

/* TODO: Remove when properly responsive */
/* Phone-only startup warning overlay */
.phone-warning-overlay {
  position: fixed;
  inset: 0; /* top:0; right:0; bottom:0; left:0 */
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(6, 6, 8, 0.88), rgba(6, 6, 8, 0.92));
  z-index: 99999;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 20px;
}
.phone-warning-overlay .phone-warning-content {
  max-width: 520px;
  width: 100%;
  background: rgba(12, 12, 14, 0.96);
  color: #fff;
  padding: 18px;
  border-radius: 12px;
  text-align: left;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: space-between;
  min-height: 140px;
}
.phone-warning-text {
  font-size: 17px;
  line-height: 1.4;
  margin-bottom: 48px;
  color: #ffcc66;
}
.phone-warning-countdown {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.95);
  margin: 6px 0 12px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.phone-warning-countdown #phone-warning-seconds {
  font-size: 16px;
  font-weight: 800;
  color: #ffcc66;
  background: rgba(255, 255, 255, 0.06);
  padding: 4px 8px;
  border-radius: 8px;
}
.phone-warning-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
}
.phone-warning-actions label {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}
.phone-warning-close {
  background: var(--button-bg, #2b6cb0);
  color: #fff;
  border: none;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  flex: 0 0 auto;
  font-family: "Martian Mono", monospace;
}
.phone-warning-actions input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

/* Smaller screens */
@media (max-width: 360px) {
  .phone-warning-overlay .phone-warning-content {
    padding: 14px;
    min-height: 120px;
  }
  .phone-warning-countdown #phone-warning-seconds {
    font-size: 22px;
  }
}
.phone-warning-line {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.85);
}

/* Ensures overlay is only visible on small screens */
@media (min-width: 641px) {
  .phone-warning-overlay {
    display: none !important;
  }
}