:root {
  --panel-width: min(88vw, 360px);
  --panel-bg-top: rgba(247, 250, 255, 0.84);
  --panel-bg-bottom: rgba(229, 236, 246, 0.72);
  --panel-border: rgba(48, 84, 142, 0.16);
  --panel-shadow: rgba(21, 35, 70, 0.18);
  --text-main: #122338;
  --text-secondary: #52657d;
  --accent: #3e82ff;
  --accent-strong: #2d72ef;
  --accent-soft: rgba(45, 114, 239, 0.18);
  --success-accent: #14b86a;
  --overlay-bg: rgba(16, 30, 54, 0.09);
  --track-bg: rgba(63, 97, 146, 0.16);
  --track-bg-strong: rgba(63, 97, 146, 0.26);
  --thumb-shadow: 0 0 0 1px rgba(61, 88, 131, 0.18), 0 10px 22px rgba(23, 36, 67, 0.14);
  --thumb-border: #ffffff;
  --hud-border: rgba(64, 97, 142, 0.16);
  --hud-surface-top: rgba(255, 255, 255, 0.66);
  --hud-surface-bottom: rgba(232, 239, 248, 0.5);
  --hud-shadow: 0 16px 30px rgba(25, 38, 74, 0.16);
  --hud-shadow-soft: 0 16px 30px rgba(25, 38, 74, 0.14);
  --hud-hover-bg: rgba(45, 114, 239, 0.1);
  --hud-active-bg: rgba(45, 114, 239, 0.16);
  --hud-focus-ring: 0 0 0 1px rgba(45, 114, 239, 0.16), 0 0 24px rgba(45, 114, 239, 0.14), 0 12px 24px rgba(25, 38, 74, 0.18);
  --panel-button-bg: rgba(255, 255, 255, 0.58);
  --panel-button-hover-bg: rgba(45, 114, 239, 0.12);
  --panel-button-shadow: 0 12px 24px rgba(26, 40, 76, 0.08);
  --section-border: rgba(64, 97, 142, 0.14);
  --control-border: rgba(64, 97, 142, 0.18);
  --control-bg: rgba(255, 255, 255, 0.72);
  --control-inset: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --control-hover-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 0 0 1px rgba(45, 114, 239, 0.12), 0 0 18px rgba(45, 114, 239, 0.12);
  --control-option-text: #16263d;
  --control-option-bg: #eff4fb;
  --dropdown-bg: rgba(248, 251, 255, 0.96);
  --dropdown-border: rgba(64, 97, 142, 0.18);
  --dropdown-shadow: 0 16px 30px rgba(25, 38, 74, 0.18);
  --item-hover-bg: rgba(45, 114, 239, 0.1);
  --item-selected-bg: rgba(45, 114, 239, 0.08);
  --action-bg: rgba(255, 255, 255, 0.58);
  --action-hover-bg: rgba(45, 114, 239, 0.1);
  --info-bg: rgba(255, 255, 255, 0.7);
  --info-bg-hover: rgba(45, 114, 239, 0.12);
  --info-border: rgba(64, 97, 142, 0.16);
  --tooltip-bg: rgba(250, 252, 255, 0.98);
  --tooltip-border: rgba(64, 97, 142, 0.18);
  --tooltip-shadow: 0 16px 34px rgba(24, 40, 73, 0.18);
  --scrollbar-track: rgba(98, 121, 159, 0.12);
  --scrollbar-track-glow: rgba(255, 255, 255, 0.5);
  --scrollbar-thumb-start: rgba(115, 157, 243, 0.75);
  --scrollbar-thumb-end: rgba(45, 114, 239, 0.92);
  --scrollbar-thumb-hover-start: rgba(140, 176, 248, 0.9);
  --scrollbar-thumb-hover-end: rgba(58, 127, 248, 0.98);
  --toggle-off-bg: rgba(87, 112, 154, 0.14);
  --toggle-off-border: rgba(87, 112, 154, 0.24);
  --toggle-knob: #ffffff;
  --chevron-color: rgba(18, 35, 56, 0.86);
  --footer-hover-glow: rgba(18, 35, 56, 0.12);
  --start-color-thumb-fill: var(--accent-strong);
  --start-color-thumb-random: #101622;
  --canvas-bg: #000;
  --unsupported-text: #f4f6f8;
  --unsupported-bg: #000;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  color-scheme: light;
}

:root[data-effective-ui-theme="dark"] {
  --panel-bg-top: rgba(9, 14, 22, 0.62);
  --panel-bg-bottom: rgba(7, 10, 16, 0.4);
  --panel-border: rgba(255, 255, 255, 0.14);
  --panel-shadow: rgba(0, 0, 0, 0.34);
  --text-main: #f7f9fc;
  --text-secondary: #c3ccd6;
  --accent: #82bbff;
  --accent-strong: #4f9dff;
  --accent-soft: rgba(79, 157, 255, 0.24);
  --overlay-bg: rgba(2, 6, 10, 0.12);
  --track-bg: rgba(255, 255, 255, 0.18);
  --track-bg-strong: rgba(255, 255, 255, 0.24);
  --thumb-shadow: 0 0 0 1px rgba(8, 14, 25, 0.48), 0 8px 18px rgba(0, 0, 0, 0.2);
  --hud-border: rgba(255, 255, 255, 0.18);
  --hud-surface-top: rgba(13, 18, 28, 0.42);
  --hud-surface-bottom: rgba(7, 11, 17, 0.3);
  --hud-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
  --hud-shadow-soft: 0 14px 28px rgba(0, 0, 0, 0.18);
  --hud-hover-bg: rgba(20, 28, 42, 0.14);
  --hud-active-bg: rgba(79, 157, 255, 0.25);
  --hud-focus-ring: 0 0 0 1px rgba(130, 187, 255, 0.14), 0 0 24px rgba(79, 157, 255, 0.22), 0 14px 28px rgba(0, 0, 0, 0.2);
  --panel-button-bg: rgba(255, 255, 255, 0.08);
  --panel-button-hover-bg: rgba(79, 157, 255, 0.16);
  --panel-button-shadow: 0 0 20px rgba(79, 157, 255, 0.18);
  --section-border: rgba(255, 255, 255, 0.1);
  --control-border: rgba(255, 255, 255, 0.18);
  --control-bg: rgba(20, 28, 42, 0.85);
  --control-inset: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --control-hover-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 0 0 1px rgba(130, 187, 255, 0.12), 0 0 18px rgba(79, 157, 255, 0.14);
  --control-option-text: #e8ecf2;
  --control-option-bg: #141c2a;
  --dropdown-bg: rgba(12, 18, 28, 0.96);
  --dropdown-border: rgba(130, 187, 255, 0.2);
  --dropdown-shadow: 0 12px 32px rgba(0, 0, 0, 0.36);
  --item-hover-bg: rgba(79, 157, 255, 0.12);
  --item-selected-bg: rgba(79, 157, 255, 0.08);
  --action-bg: rgba(255, 255, 255, 0.08);
  --action-hover-bg: rgba(79, 157, 255, 0.14);
  --info-bg: rgba(255, 255, 255, 0.08);
  --info-bg-hover: rgba(79, 157, 255, 0.18);
  --info-border: rgba(255, 255, 255, 0.18);
  --tooltip-bg: rgba(7, 12, 18, 0.96);
  --tooltip-border: rgba(130, 187, 255, 0.24);
  --tooltip-shadow: 0 12px 28px rgba(0, 0, 0, 0.26);
  --scrollbar-track: rgba(255, 255, 255, 0.06);
  --scrollbar-track-glow: rgba(255, 255, 255, 0.02);
  --scrollbar-thumb-start: rgba(140, 188, 255, 0.56);
  --scrollbar-thumb-end: rgba(79, 157, 255, 0.82);
  --scrollbar-thumb-hover-start: rgba(161, 202, 255, 0.76);
  --scrollbar-thumb-hover-end: rgba(102, 173, 255, 0.96);
  --toggle-off-bg: rgba(255, 255, 255, 0.12);
  --toggle-off-border: rgba(255, 255, 255, 0.3);
  --chevron-color: rgba(247, 249, 252, 0.94);
  --footer-hover-glow: rgba(247, 249, 252, 0.2);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-effective-ui-theme]) {
    --panel-bg-top: rgba(9, 14, 22, 0.62);
    --panel-bg-bottom: rgba(7, 10, 16, 0.4);
    --panel-border: rgba(255, 255, 255, 0.14);
    --panel-shadow: rgba(0, 0, 0, 0.34);
    --text-main: #f7f9fc;
    --text-secondary: #c3ccd6;
    --accent: #82bbff;
    --accent-strong: #4f9dff;
    --accent-soft: rgba(79, 157, 255, 0.24);
    --overlay-bg: rgba(2, 6, 10, 0.12);
    --track-bg: rgba(255, 255, 255, 0.18);
    --track-bg-strong: rgba(255, 255, 255, 0.24);
    --thumb-shadow: 0 0 0 1px rgba(8, 14, 25, 0.48), 0 8px 18px rgba(0, 0, 0, 0.2);
    --hud-border: rgba(255, 255, 255, 0.18);
    --hud-surface-top: rgba(13, 18, 28, 0.42);
    --hud-surface-bottom: rgba(7, 11, 17, 0.3);
    --hud-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
    --hud-shadow-soft: 0 14px 28px rgba(0, 0, 0, 0.18);
    --hud-hover-bg: rgba(20, 28, 42, 0.14);
    --hud-active-bg: rgba(79, 157, 255, 0.25);
    --hud-focus-ring: 0 0 0 1px rgba(130, 187, 255, 0.14), 0 0 24px rgba(79, 157, 255, 0.22), 0 14px 28px rgba(0, 0, 0, 0.2);
    --panel-button-bg: rgba(255, 255, 255, 0.08);
    --panel-button-hover-bg: rgba(79, 157, 255, 0.16);
    --panel-button-shadow: 0 0 20px rgba(79, 157, 255, 0.18);
    --section-border: rgba(255, 255, 255, 0.1);
    --control-border: rgba(255, 255, 255, 0.18);
    --control-bg: rgba(20, 28, 42, 0.85);
    --control-inset: inset 0 1px 0 rgba(255, 255, 255, 0.06);
    --control-hover-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 0 0 1px rgba(130, 187, 255, 0.12), 0 0 18px rgba(79, 157, 255, 0.14);
    --control-option-text: #e8ecf2;
    --control-option-bg: #141c2a;
    --dropdown-bg: rgba(12, 18, 28, 0.96);
    --dropdown-border: rgba(130, 187, 255, 0.2);
    --dropdown-shadow: 0 12px 32px rgba(0, 0, 0, 0.36);
    --item-hover-bg: rgba(79, 157, 255, 0.12);
    --item-selected-bg: rgba(79, 157, 255, 0.08);
    --action-bg: rgba(255, 255, 255, 0.08);
    --action-hover-bg: rgba(79, 157, 255, 0.14);
    --info-bg: rgba(255, 255, 255, 0.08);
    --info-bg-hover: rgba(79, 157, 255, 0.18);
    --info-border: rgba(255, 255, 255, 0.18);
    --tooltip-bg: rgba(7, 12, 18, 0.96);
    --tooltip-border: rgba(130, 187, 255, 0.24);
    --tooltip-shadow: 0 12px 28px rgba(0, 0, 0, 0.26);
    --scrollbar-track: rgba(255, 255, 255, 0.06);
    --scrollbar-track-glow: rgba(255, 255, 255, 0.02);
    --scrollbar-thumb-start: rgba(140, 188, 255, 0.56);
    --scrollbar-thumb-end: rgba(79, 157, 255, 0.82);
    --scrollbar-thumb-hover-start: rgba(161, 202, 255, 0.76);
    --scrollbar-thumb-hover-end: rgba(102, 173, 255, 0.96);
    --toggle-off-bg: rgba(255, 255, 255, 0.12);
    --toggle-off-border: rgba(255, 255, 255, 0.3);
    --chevron-color: rgba(247, 249, 252, 0.94);
    --footer-hover-glow: rgba(247, 249, 252, 0.2);
    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--canvas-bg);
  overflow-x: hidden;
}

body {
  position: relative;
  color: var(--text-main);
  font: 400 14px/1.4 "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  overscroll-behavior-x: none;
  overscroll-behavior-y: auto;
  -webkit-tap-highlight-color: transparent;
}

button,
input,
select {
  font: inherit;
}

#fractal {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  background: var(--canvas-bg);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  touch-action: pan-y pinch-zoom;
}

#menu-edge-zone {
  position: fixed;
  top: 0;
  left: 0;
  width: 48px;
  height: 100vh;
  height: 100dvh;
  z-index: 9;
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}

#menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease, visibility 220ms ease;
}

#menu-peek-button,
#scene-hud,
#settings-drawer,
#settings-drawer h1,
#settings-drawer h2,
#settings-drawer label,
#settings-drawer span {
  user-select: none;
  -webkit-user-select: none;
}

#menu-peek-button {
  position: fixed;
  top: 50%;
  left: 12px;
  z-index: 12;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 42px;
  height: 74px;
  border: 1px solid var(--hud-border);
  border-radius: 999px;
  background-image: linear-gradient(180deg, var(--hud-surface-top), var(--hud-surface-bottom));
  background-color: transparent;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: var(--hud-shadow);
  color: var(--text-main);
  cursor: pointer;
  transform: translateY(-50%);
  transition: opacity 180ms ease, transform 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease;
}

#menu-peek-button:hover,
#menu-peek-button:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 70%, transparent);
  background-color: var(--hud-hover-bg);
  box-shadow: var(--hud-focus-ring);
  transform: translateY(-50%) translateX(2px);
  outline: none;
}

#menu-peek-button.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translate(-14px, -50%);
}

#menu-peek-button.is-dimmed {
  opacity: 0;
  pointer-events: none;
  transform: translate(-14px, -50%);
}

.menu-peek-chevron {
  width: 14px;
  height: 14px;
  border-top: 2.5px solid var(--chevron-color);
  border-right: 2.5px solid var(--chevron-color);
  transform: translateX(-1px) rotate(45deg);
}

#menu-close-handle {
  position: fixed;
  top: 50%;
  left: 0;
  z-index: 12;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 64px;
  border: 1px solid var(--hud-border);
  border-radius: 999px;
  background-image: linear-gradient(180deg, var(--hud-surface-top), var(--hud-surface-bottom));
  background-color: transparent;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: var(--hud-shadow);
  color: var(--text-main);
  cursor: pointer;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) translateX(-8px);
  transition: opacity 160ms ease, transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

#menu-close-handle.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(-50%) translateX(0);
}

#menu-close-handle:hover,
#menu-close-handle:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 70%, transparent);
  background-color: var(--hud-hover-bg);
  box-shadow: var(--hud-focus-ring);
  transform: translateY(-50%) translateX(-2px);
  outline: none;
}

.menu-close-chevron {
  width: 12px;
  height: 12px;
  border-top: 2.5px solid var(--chevron-color);
  border-right: 2.5px solid var(--chevron-color);
  transform: translateX(2px) rotate(225deg);
}

#scene-hud {
  position: fixed;
  bottom: calc(18px + var(--safe-bottom));
  right: 18px;
  z-index: 9;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
  max-width: calc(100vw - 36px);
  transition: opacity 180ms ease, transform 180ms ease;
}

#scene-hud.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

#scene-hud.is-dimmed {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}

.hud-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 68px;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--hud-border);
  border-radius: 999px;
  background-image: linear-gradient(180deg, var(--hud-surface-top), var(--hud-surface-bottom));
  background-color: transparent;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: var(--hud-shadow-soft);
  color: var(--text-main);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, color 200ms ease;
}

.hud-button:hover,
.hud-button:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background-color: var(--hud-hover-bg);
  box-shadow: var(--hud-focus-ring);
  transform: translateY(-1px);
  outline: none;
}

.hud-button[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background-color: var(--hud-active-bg);
  color: var(--accent);
}

.hud-icon {
  width: 15px;
  height: 15px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.hud-icon-pause,
.hud-icon-play {
  width: 17px;
  height: 17px;
}

.hud-icon-play {
  display: none;
  fill: currentColor;
  stroke: none;
}

.hud-icon-pin {
  width: 16px;
  height: 16px;
  fill: currentColor;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linejoin: round;
  fill-rule: evenodd;
}

#pause-scene-button[aria-pressed="true"] .hud-icon-pause {
  display: none;
}

#pause-scene-button[aria-pressed="true"] .hud-icon-play {
  display: block;
}

.hud-button-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

#pause-scene-label {
  display: inline-block;
  min-width: 4.8em;
  text-align: center;
}

#settings-drawer {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 11;
  width: var(--panel-width);
  height: 100vh;
  height: 100dvh;
  padding: 18px 16px calc(8px + var(--safe-bottom));
  border-right: 1px solid var(--panel-border);
  background: linear-gradient(180deg, var(--panel-bg-top), var(--panel-bg-bottom));
  backdrop-filter: blur(28px) saturate(160%);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
  box-shadow: 18px 0 42px var(--panel-shadow);
  transform: translateX(-100%);
  transition: transform 220ms ease;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-padding-bottom: calc(24px + var(--safe-bottom));
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb-end) var(--scrollbar-track);
}



#settings-drawer::-webkit-scrollbar {
  width: 8px;
}

#settings-drawer::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: 999px;
}

#settings-drawer::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--scrollbar-thumb-start), var(--scrollbar-thumb-end));
  background-clip: padding-box;
}

#settings-drawer::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--scrollbar-thumb-hover-start), var(--scrollbar-thumb-hover-end));
  background-clip: padding-box;
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.drawer-header-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.drawer-header h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

#menu-close-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--panel-border);
  border-radius: 50%;
  padding: 0;
  background: var(--panel-button-bg);
  color: var(--text-main);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

#menu-close-button:hover,
#menu-close-button:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background: var(--panel-button-hover-bg);
  box-shadow: var(--panel-button-shadow);
  transform: translateY(-1px);
  outline: none;
}

#theme-toggle-button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--panel-border);
  border-radius: 50%;
  padding: 0;
  background: var(--panel-button-bg);
  color: var(--text-main);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

#theme-toggle-button:hover,
#theme-toggle-button:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background: var(--panel-button-hover-bg);
  box-shadow: var(--panel-button-shadow);
  transform: translateY(-1px);
  outline: none;
}

.theme-icon {
  position: absolute;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  transition: opacity 250ms ease, transform 250ms ease;
}

.theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

.theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

#theme-toggle-button[aria-pressed="true"] .theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

#theme-toggle-button[aria-pressed="true"] .theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

#drawer-drag-handle {
  position: absolute;
  top: 0;
  right: 0;
  width: 28px;
  height: 100%;
  touch-action: pan-y;
}

.control-section {
  margin: 14px 0 0;
  padding: 10px 0 2px;
  border-top: 1px solid var(--section-border);
}

.control-section h2 {
  margin: 0 0 8px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.control-section label {
  display: block;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
}

.label-row label {
  margin: 0;
}

.label-side {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.value-label {
  color: var(--text-main);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.control-section select,
.control-section input[type="range"],
.control-section button:not(.info-button) {
  width: 100%;
}

.control-section select,
.control-section button:not(.info-button) {
  margin-top: 8px;
}

.control-section select {
  -webkit-appearance: none;
  appearance: none;
  border: 1px solid var(--control-border);
  border-radius: 12px;
  padding: 10px 36px 10px 12px;
  margin-bottom: 4px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--control-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 7'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2352657d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 14px center / 12px;
  box-shadow: var(--control-inset);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.control-section select:hover,
.control-section select:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  box-shadow: var(--control-hover-shadow);
  transform: translateY(-1px);
  outline: none;
}

.control-section select option {
  color: var(--control-option-text);
  background: var(--control-option-bg);
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 6px 8px;
}

.control-section select option:checked {
  color: var(--accent);
  background: linear-gradient(0deg, var(--accent-soft), var(--accent-soft));
}

.custom-dropdown {
  position: relative;
  margin-top: 8px;
  margin-bottom: 4px;
}

.custom-dropdown-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: 1px solid var(--control-border);
  border-radius: 12px;
  padding: 10px 14px 10px 12px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: var(--control-bg);
  box-shadow: var(--control-inset);
  cursor: pointer;
  text-align: left;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.custom-dropdown-trigger:hover,
.custom-dropdown-trigger:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  box-shadow: var(--control-hover-shadow);
  transform: translateY(-1px);
  outline: none;
}

.custom-dropdown-arrow {
  width: 12px;
  height: 7px;
  flex: 0 0 auto;
  color: var(--text-secondary);
  transition: transform 160ms ease;
}

.custom-dropdown[aria-expanded="true"] .custom-dropdown-arrow {
  transform: rotate(180deg);
}

.custom-dropdown-list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 20;
  margin: 0;
  padding: 4px 0;
  list-style: none;
  border: 1px solid var(--dropdown-border);
  border-radius: 10px;
  background: var(--dropdown-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--dropdown-shadow);
  max-height: 240px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb-end) transparent;
}

.custom-dropdown-list::-webkit-scrollbar {
  width: 6px;
}

.custom-dropdown-list::-webkit-scrollbar-track {
  background: transparent;
}

.custom-dropdown-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: linear-gradient(180deg, var(--scrollbar-thumb-start), var(--scrollbar-thumb-end));
}

.custom-dropdown-list::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--scrollbar-thumb-hover-start), var(--scrollbar-thumb-hover-end));
}

.custom-dropdown[aria-expanded="true"] .custom-dropdown-list {
  display: block;
}

.custom-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background 100ms ease, color 100ms ease;
}

.custom-dropdown-item:hover {
  background: var(--item-hover-bg);
  color: var(--text-main);
}

.custom-dropdown-item[aria-selected="true"] {
  color: var(--accent);
  font-weight: 600;
  background: var(--item-selected-bg);
  box-shadow: inset 3px 0 0 var(--accent);
}

.custom-dropdown-swatch {
  width: 28px;
  height: 10px;
  border-radius: 4px;
  flex: 0 0 auto;
  border: 1px solid color-mix(in srgb, var(--panel-border) 80%, transparent);
}

.control-section input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: calc(100% - 10px);
  height: 34px;
  margin: 8px 5px 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  outline: none;
  touch-action: pan-y;
}

.control-section input[type="range"]:hover::-webkit-slider-thumb,
.control-section input[type="range"]:focus-visible::-webkit-slider-thumb {
  box-shadow: var(--thumb-shadow), 0 0 18px color-mix(in srgb, var(--accent) 28%, transparent);
}

.control-section input[type="range"]:hover::-moz-range-thumb,
.control-section input[type="range"]:focus-visible::-moz-range-thumb {
  box-shadow: var(--thumb-shadow), 0 0 18px color-mix(in srgb, var(--accent) 28%, transparent);
}

.control-section input[type="range"]::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--track-bg-strong), var(--track-bg));
}

.control-section input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  margin-top: -6px;
  border-radius: 50%;
  border: 2px solid var(--thumb-border);
  background: var(--accent-strong);
  box-shadow: var(--thumb-shadow);
}

.control-section input[type="range"]::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--track-bg-strong), var(--track-bg));
  border: 0;
}

.control-section input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--thumb-border);
  background: var(--accent-strong);
  box-shadow: var(--thumb-shadow);
}

#start-color-slider {
  transition: opacity 280ms ease;
}

#start-color-slider::-webkit-slider-runnable-track {
  height: 12px;
  background: var(--start-color-gradient, linear-gradient(90deg, #ff0000, #00ffff, #ff0000));
}

#start-color-slider::-moz-range-track {
  height: 12px;
  background: var(--start-color-gradient, linear-gradient(90deg, #ff0000, #00ffff, #ff0000));
  border: 0;
}

#start-color-slider::-moz-range-thumb {
  background: var(--accent-strong);
  transition: background-color 220ms ease, box-shadow 220ms ease;
}

#start-color-slider::-webkit-slider-thumb {
  margin-top: -4px;
  background: var(--accent-strong);
  transition: background-color 220ms ease, box-shadow 220ms ease;
}

#start-color-slider.is-manual-mode {
  opacity: 1;
}

#start-color-slider.is-random-mode {
  opacity: 0.45;
}

#start-color-slider.is-random-mode::-moz-range-thumb {
  background: var(--start-color-thumb-random);
}

#start-color-slider.is-random-mode::-webkit-slider-thumb {
  background: var(--start-color-thumb-random);
}

.toggle-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 18px;
  align-items: center;
  column-gap: 22px;
  margin-top: 12px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
}

.toggle-row > span {
  line-height: 20px;
  min-width: 0;
}

.toggle-row input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 58px;
  height: 30px;
  margin: 0;
  justify-self: end;
  border: 1px solid var(--toggle-off-border);
  border-radius: 999px;
  background: var(--toggle-off-bg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.24);
  position: relative;
  vertical-align: middle;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.toggle-row input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--toggle-knob);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.16);
  transition: transform 140ms ease;
}

.toggle-row input[type="checkbox"]:checked {
  background: color-mix(in srgb, var(--accent) 42%, transparent);
  border-color: color-mix(in srgb, var(--accent) 76%, transparent);
}

.toggle-row input[type="checkbox"]:hover,
.toggle-row input[type="checkbox"]:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 18%, transparent);
  outline: none;
}

.toggle-row input[type="checkbox"]:checked::after {
  transform: translateX(28px);
}

.range-end-labels {
  display: flex;
  justify-content: space-between;
  margin-top: -6px;
  padding: 0 6px;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 600;
}

.dual-range {
  position: relative;
  margin-top: 10px;
  padding: 0 6px;
  height: 44px;
}

.dual-range-track {
  position: absolute;
  top: 18px;
  left: 6px;
  right: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--track-bg-strong), var(--track-bg));
}

.dual-range-fill {
  position: absolute;
  top: 18px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 30%, transparent);
  --thumb-half: 11px;
  --inset: 6px;
  --usable: calc(100% - var(--inset) * 2 - var(--thumb-half) * 2);
  left: calc(var(--inset) + var(--thumb-half) + var(--fill-start, 0) * var(--usable));
  width: calc(var(--fill-span, 0) * var(--usable));
  transition: left 80ms ease, width 80ms ease;
}

.dual-range-ticks {
  position: absolute;
  top: 18px;
  left: 6px;
  right: 6px;
  height: 6px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.dual-range-tick {
  width: 1px;
  height: 100%;
  background: var(--text-secondary);
  opacity: 0.25;
}

.dual-range-labels {
  position: absolute;
  top: 28px;
  left: 4px;
  right: 4px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.dual-range-label {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-secondary);
  opacity: 0.7;
  width: 14px;
  text-align: center;
}

.dual-range input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  position: absolute;
  inset: 0 6px;
  margin: 0;
  width: auto;
  height: 44px;
  background: transparent;
  pointer-events: none;
  touch-action: pan-y;
}

.dual-range input[type="range"]:focus {
  outline: none;
}

.dual-range input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: transparent;
}

.dual-range input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -8px;
  border-radius: 50%;
  border: 2.5px solid var(--thumb-border);
  background: var(--accent-strong);
  box-shadow: var(--thumb-shadow);
  pointer-events: auto;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.dual-range input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--thumb-shadow), 0 0 12px color-mix(in srgb, var(--accent) 30%, transparent);
}

.dual-range input[type="range"]::-moz-range-track {
  height: 6px;
  background: transparent;
  border: 0;
}

.dual-range input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2.5px solid var(--thumb-border);
  background: var(--accent-strong);
  box-shadow: var(--thumb-shadow);
  pointer-events: auto;
}

#power-min-slider {
  z-index: 2;
}

#power-max-slider {
  z-index: 3;
}

.actions button:not(.info-button) {
  border: 1px solid var(--control-border);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--text-main);
  background: var(--action-bg);
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.actions button:not(.info-button):hover,
.actions button:not(.info-button):focus-visible {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background: var(--action-hover-bg);
  box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 18%, transparent);
  transform: translateY(-1px);
  outline: none;
}

#reset-settings-button.is-armed {
  border-color: color-mix(in srgb, #d44848 68%, var(--control-border));
  background: color-mix(in srgb, #d44848 14%, var(--action-bg));
  box-shadow: 0 0 18px color-mix(in srgb, #d44848 18%, transparent);
}

#reset-settings-button.is-armed:hover,
#reset-settings-button.is-armed:focus-visible {
  border-color: color-mix(in srgb, #d44848 82%, transparent);
  background: color-mix(in srgb, #d44848 22%, var(--action-bg));
  box-shadow: 0 0 20px color-mix(in srgb, #d44848 26%, transparent);
}

.action-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.action-row > button:first-child {
  margin-top: 0;
  flex: 1 1 auto;
}

.info-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  border: 1px solid var(--info-border);
  border-radius: 50%;
  padding: 0;
  background: var(--info-bg);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  z-index: 1;
  transition: border-color 160ms ease, color 160ms ease, background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.info-button::after {
  content: attr(data-info);
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  width: min(240px, calc(var(--panel-width) - 48px));
  padding: 9px 11px;
  border: 1px solid var(--tooltip-border);
  border-radius: 10px;
  background: var(--tooltip-bg);
  box-shadow: var(--tooltip-shadow);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.45;
  text-align: left;
  white-space: normal;
  z-index: 1;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.info-button:hover,
.info-button:focus-visible,
.info-button:focus {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background: var(--info-bg-hover);
  color: var(--text-main);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 18%, transparent);
  transform: translateY(-1px);
  z-index: 15;
  outline: none;
}

.info-button:hover::after,
.info-button:focus-visible::after,
.info-button:focus::after,
.info-button.is-tooltip-open::after {
  opacity: 1;
  transform: translateY(0);
}

.info-button.is-tooltip-suppressed:hover::after,
.info-button.is-tooltip-suppressed:focus-visible::after,
.info-button.is-tooltip-suppressed:focus::after {
  opacity: 0;
  transform: translateY(-4px);
}

.info-button.is-tooltip-open {
  border-color: color-mix(in srgb, var(--accent) 72%, transparent);
  background: var(--info-bg-hover);
  color: var(--text-main);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 18%, transparent);
  z-index: 15;
}

.menu-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--section-border);
  color: var(--text-secondary);
  font-size: 12px;
}

.menu-footer a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 160ms ease, text-shadow 160ms ease;
}

.menu-footer a svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.menu-footer a:hover,
.menu-footer a:focus-visible {
  color: var(--text-main);
  text-shadow: 0 0 14px var(--footer-hover-glow);
  outline: none;
}

#unsupported {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: var(--unsupported-text);
  background: var(--unsupported-bg);
  font: 600 16px/1.5 "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

@media (max-width: 640px) {
  :root {
    --panel-width: min(92vw, 340px);
  }

  #menu-edge-zone {
    width: 100vw;
  }

  #menu-peek-button {
    left: 8px;
    width: 36px;
    height: 66px;
  }

  #menu-close-handle {
    width: 30px;
    height: 54px;
  }

  .menu-close-chevron {
    width: 10px;
    height: 10px;
  }

  #scene-hud {
    bottom: calc(12px + var(--safe-bottom));
    right: auto;
    left: 50%;
    transform: translateX(-50%);
    flex-wrap: nowrap;
    justify-content: center;
    gap: 6px;
    max-width: calc(100vw - 16px);
  }

  #scene-hud.is-hidden {
    transform: translateX(-50%) translateY(8px);
  }

  #scene-hud.is-dimmed {
    transform: translateX(-50%) translateY(10px);
  }

  .hud-button {
    min-width: 0;
    height: 36px;
    padding: 0 10px;
    gap: 5px;
  }

  .hud-button-label {
    font-size: 10px;
    letter-spacing: 0.04em;
  }

  .label-row {
    align-items: flex-start;
  }

  .label-side {
    gap: 8px;
  }

  .toggle-row {
    column-gap: 18px;
  }

  .info-button::after {
    width: min(220px, calc(var(--panel-width) - 36px));
    right: -4px;
  }

  .menu-footer {
    flex-wrap: wrap;
  }
}

@media (hover: none) and (pointer: coarse) {
  #menu-edge-zone {
    width: 100vw;
  }

  .control-section input[type="range"] {
    height: 40px;
  }

  .dual-range {
    height: 48px;
  }
}