:root {
  --text-main: #eef3ff;
  --text-sub: rgba(212, 224, 248, 0.74);
  --text-dim: rgba(193, 208, 235, 0.58);

  --accent: #5bd1ff;
  --accent-2: #52ffd7;
  --accent-3: #8f7bff;
  --danger: #ffb08a;

  --page-bg:
    radial-gradient(1200px 900px at 85% -15%, rgba(91, 209, 255, 0.22), transparent 50%),
    radial-gradient(1100px 900px at -10% 115%, rgba(82, 255, 215, 0.14), transparent 54%),
    radial-gradient(720px 520px at 40% 105%, rgba(143, 123, 255, 0.12), transparent 58%),
    linear-gradient(152deg, #020308, #050712 44%, #0a1020);
  --page-nebula:
    radial-gradient(circle at 25% 30%, rgba(111, 224, 255, 0.12), transparent 34%),
    radial-gradient(circle at 78% 72%, rgba(91, 112, 255, 0.09), transparent 30%);
  --noise-dot: rgba(255, 255, 255, 0.04);
  --noise-opacity: 0.34;
  --noise-blend: screen;
  --stars-opacity: 0.56;
  --stars-filter: none;

  --panel-bg: linear-gradient(165deg, rgba(10, 14, 26, 0.84), rgba(6, 9, 18, 0.9));
  --panel-border: rgba(166, 191, 232, 0.22);
  --panel-border-soft: rgba(166, 191, 232, 0.12);
  --panel-inset: rgba(255, 255, 255, 0.05);
  --sidebar-glow: radial-gradient(circle, rgba(91, 209, 255, 0.2), transparent 70%);
  --main-sheen:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 16%, transparent 26%);

  --shadow-soft: 0 24px 52px rgba(1, 4, 10, 0.46);
  --shadow-hard: 0 30px 70px rgba(0, 0, 0, 0.62);

  --search-bg: rgba(4, 7, 14, 0.7);
  --search-focus-border: rgba(91, 209, 255, 0.8);
  --search-focus-ring: rgba(91, 209, 255, 0.2);
  --scrollbar-thumb: rgba(120, 147, 190, 0.35);

  --card-bg: linear-gradient(165deg, rgba(7, 12, 22, 0.62), rgba(5, 8, 16, 0.76));
  --card-border: rgba(156, 184, 227, 0.2);
  --card-hover-border: rgba(91, 209, 255, 0.62);
  --card-hover-shadow: 0 12px 22px rgba(3, 8, 18, 0.36);
  --card-active-border: rgba(82, 255, 215, 0.74);
  --card-active-shadow: 0 16px 30px rgba(0, 0, 0, 0.4);
  --card-active-inset: rgba(82, 255, 215, 0.2);

  --theme-switch-bg: rgba(5, 9, 17, 0.74);
  --theme-switch-border: rgba(161, 188, 227, 0.3);
  --theme-active-bg: linear-gradient(135deg, rgba(82, 255, 215, 0.95), rgba(91, 209, 255, 0.92));
  --theme-active-text: #041f1b;

  --btn-ghost-bg: rgba(7, 11, 20, 0.66);
  --btn-ghost-border: rgba(161, 188, 227, 0.3);
  --btn-ghost-hover-bg: rgba(10, 16, 30, 0.85);
  --btn-ghost-hover-border: rgba(91, 209, 255, 0.75);

  --btn-solid-bg: linear-gradient(132deg, rgba(82, 255, 215, 0.95), rgba(91, 209, 255, 0.93));
  --btn-solid-text: #032321;
  --btn-solid-playing-bg: linear-gradient(132deg, rgba(255, 176, 138, 0.96), rgba(255, 214, 142, 0.95));
  --btn-solid-playing-text: #341708;

  --stage-border: rgba(166, 194, 232, 0.24);
  --stage-bg:
    radial-gradient(circle at 50% 50%, rgba(20, 32, 54, 0.78), rgba(6, 8, 16, 0.98) 72%),
    linear-gradient(180deg, rgba(34, 54, 84, 0.28), transparent 26%);
  --stage-inset-shadow: rgba(0, 0, 0, 0.45);
  --stage-overlay:
    radial-gradient(circle at 50% 18%, rgba(117, 202, 255, 0.14), transparent 36%),
    radial-gradient(circle at 50% 130%, rgba(53, 82, 135, 0.22), transparent 46%);

  --ring-1-border: rgba(102, 178, 255, 0.18);
  --ring-2-border: rgba(95, 238, 222, 0.16);
  --ring-3-border: rgba(171, 143, 255, 0.15);
  --ring-opacity: 1;

  --slide-shadow: drop-shadow(0 24px 30px rgba(0, 0, 0, 0.42));
  --hot-left-hover: linear-gradient(90deg, rgba(84, 134, 210, 0.17), transparent);
  --hot-right-hover: linear-gradient(270deg, rgba(84, 134, 210, 0.17), transparent);

  --progress-track: rgba(165, 191, 228, 0.16);
  --progress-bar: linear-gradient(90deg, var(--accent-2), var(--accent), var(--accent-3));
  --progress-glow: rgba(91, 209, 255, 0.48);

  --select-bg: rgba(5, 10, 18, 0.7);
  --select-border: rgba(162, 190, 228, 0.28);

  --kbd-bg: rgba(5, 9, 17, 0.84);
  --kbd-border: rgba(156, 186, 227, 0.24);

  --thumb-bg: linear-gradient(170deg, rgba(8, 13, 24, 0.76), rgba(4, 7, 14, 0.84));
  --thumb-border: rgba(160, 188, 224, 0.24);
  --thumb-hover-border: rgba(91, 209, 255, 0.62);
  --thumb-active-border: rgba(82, 255, 215, 0.82);
  --thumb-active-shadow: rgba(82, 255, 215, 0.24);

  --empty-border: rgba(167, 194, 232, 0.34);
  --empty-code-bg: rgba(6, 9, 16, 0.9);
  --empty-code-border: rgba(157, 186, 227, 0.3);
}

body[data-theme="warm"] {
  --text-main: #3d3125;
  --text-sub: rgba(91, 74, 58, 0.78);
  --text-dim: rgba(107, 87, 68, 0.64);

  --accent: #8f603d;
  --accent-2: #b67e4e;
  --accent-3: #d0a46c;
  --danger: #a3503b;

  --page-bg:
    radial-gradient(1200px 900px at 85% -15%, rgba(235, 182, 122, 0.22), transparent 50%),
    radial-gradient(980px 800px at -8% 110%, rgba(224, 196, 150, 0.18), transparent 52%),
    radial-gradient(900px 560px at 40% 104%, rgba(255, 232, 193, 0.35), transparent 58%),
    linear-gradient(152deg, #f7efe2, #f5ead8 44%, #efe1cb);
  --page-nebula:
    radial-gradient(circle at 25% 30%, rgba(230, 190, 137, 0.2), transparent 34%),
    radial-gradient(circle at 78% 72%, rgba(214, 164, 117, 0.15), transparent 30%);
  --noise-dot: rgba(74, 54, 34, 0.1);
  --noise-opacity: 0.16;
  --noise-blend: multiply;
  --stars-opacity: 0.08;
  --stars-filter: blur(0.3px);

  --panel-bg: linear-gradient(165deg, rgba(255, 251, 245, 0.88), rgba(251, 244, 234, 0.9));
  --panel-border: rgba(188, 162, 127, 0.3);
  --panel-border-soft: rgba(188, 162, 127, 0.2);
  --panel-inset: rgba(255, 255, 255, 0.42);
  --sidebar-glow: radial-gradient(circle, rgba(214, 164, 117, 0.26), transparent 70%);
  --main-sheen:
    linear-gradient(180deg, rgba(255, 255, 255, 0.58) 0%, rgba(255, 255, 255, 0.18) 16%, transparent 30%);

  --shadow-soft: 0 22px 48px rgba(91, 62, 29, 0.18);
  --shadow-hard: 0 26px 56px rgba(91, 62, 29, 0.23);

  --search-bg: rgba(250, 242, 229, 0.82);
  --search-focus-border: rgba(155, 109, 69, 0.72);
  --search-focus-ring: rgba(176, 136, 96, 0.2);
  --scrollbar-thumb: rgba(176, 143, 102, 0.4);

  --card-bg: linear-gradient(165deg, rgba(251, 242, 226, 0.82), rgba(245, 234, 213, 0.94));
  --card-border: rgba(173, 139, 102, 0.3);
  --card-hover-border: rgba(155, 109, 69, 0.7);
  --card-hover-shadow: 0 10px 18px rgba(132, 94, 59, 0.22);
  --card-active-border: rgba(154, 106, 63, 0.78);
  --card-active-shadow: 0 12px 24px rgba(120, 83, 49, 0.22);
  --card-active-inset: rgba(167, 124, 84, 0.26);

  --theme-switch-bg: rgba(245, 232, 211, 0.76);
  --theme-switch-border: rgba(176, 143, 102, 0.34);
  --theme-active-bg: linear-gradient(135deg, #9b6d45, #bc8857);
  --theme-active-text: #fffdf8;

  --btn-ghost-bg: rgba(250, 242, 229, 0.78);
  --btn-ghost-border: rgba(173, 139, 102, 0.38);
  --btn-ghost-hover-bg: rgba(245, 232, 211, 0.95);
  --btn-ghost-hover-border: rgba(155, 109, 69, 0.72);

  --btn-solid-bg: linear-gradient(135deg, #9f7047, #c18a58);
  --btn-solid-text: #fffdf8;
  --btn-solid-playing-bg: linear-gradient(135deg, #b8604f, #cf8c66);
  --btn-solid-playing-text: #fff;

  --stage-border: rgba(186, 152, 114, 0.35);
  --stage-bg:
    radial-gradient(circle at 50% 50%, rgba(246, 231, 204, 0.78), rgba(236, 221, 197, 0.94) 72%),
    linear-gradient(180deg, rgba(234, 202, 154, 0.2), transparent 26%);
  --stage-inset-shadow: rgba(154, 113, 70, 0.2);
  --stage-overlay:
    radial-gradient(circle at 50% 18%, rgba(255, 219, 170, 0.22), transparent 36%),
    radial-gradient(circle at 50% 130%, rgba(216, 179, 132, 0.28), transparent 46%);

  --ring-1-border: rgba(185, 150, 112, 0.34);
  --ring-2-border: rgba(195, 162, 124, 0.3);
  --ring-3-border: rgba(180, 145, 110, 0.28);
  --ring-opacity: 0.18;

  --slide-shadow: drop-shadow(0 20px 26px rgba(123, 90, 56, 0.28));
  --hot-left-hover: linear-gradient(90deg, rgba(190, 143, 93, 0.14), transparent);
  --hot-right-hover: linear-gradient(270deg, rgba(190, 143, 93, 0.14), transparent);

  --progress-track: rgba(171, 133, 96, 0.18);
  --progress-bar: linear-gradient(90deg, #d39d68, #c37f4f, #a56540);
  --progress-glow: rgba(167, 106, 63, 0.4);

  --select-bg: rgba(248, 239, 223, 0.84);
  --select-border: rgba(173, 139, 102, 0.34);

  --kbd-bg: rgba(245, 233, 214, 0.82);
  --kbd-border: rgba(173, 139, 102, 0.34);

  --thumb-bg: linear-gradient(170deg, rgba(250, 241, 224, 0.84), rgba(245, 234, 211, 0.96));
  --thumb-border: rgba(173, 139, 102, 0.32);
  --thumb-hover-border: rgba(155, 109, 69, 0.62);
  --thumb-active-border: rgba(161, 115, 73, 0.82);
  --thumb-active-shadow: rgba(161, 115, 73, 0.24);

  --empty-border: rgba(180, 149, 113, 0.38);
  --empty-code-bg: rgba(245, 233, 214, 0.82);
  --empty-code-border: rgba(173, 139, 102, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Sora", "Avenir Next", "PingFang SC", "Segoe UI", sans-serif;
  color: var(--text-main);
  background: var(--page-bg);
  overflow: hidden;
  letter-spacing: 0.005em;
  transition: background 0.45s ease, color 0.3s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: -20%;
  pointer-events: none;
  background: var(--page-nebula);
  filter: blur(40px);
  animation: nebulaDrift 20s ease-in-out infinite alternate;
  opacity: 0.95;
}

.bg-noise,
.bg-stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-noise {
  background-image: radial-gradient(var(--noise-dot) 0.7px, transparent 0.7px);
  background-size: 3px 3px;
  opacity: var(--noise-opacity);
  mix-blend-mode: var(--noise-blend);
  transition: opacity 0.35s ease, mix-blend-mode 0.35s ease;
}

.bg-stars {
  background:
    radial-gradient(2px 2px at 18% 26%, rgba(255, 255, 255, 0.82), transparent 65%),
    radial-gradient(1.8px 1.8px at 38% 73%, rgba(194, 214, 255, 0.65), transparent 65%),
    radial-gradient(2.2px 2.2px at 62% 41%, rgba(255, 255, 255, 0.7), transparent 65%),
    radial-gradient(1.6px 1.6px at 84% 19%, rgba(181, 227, 255, 0.68), transparent 65%),
    radial-gradient(1.4px 1.4px at 71% 82%, rgba(197, 248, 238, 0.62), transparent 65%),
    radial-gradient(1.8px 1.8px at 9% 88%, rgba(205, 221, 255, 0.58), transparent 65%);
  opacity: var(--stars-opacity);
  filter: var(--stars-filter);
  animation: starPulse 6s ease-in-out infinite alternate;
  transition: opacity 0.35s ease, filter 0.35s ease;
}

.layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 316px minmax(0, 1fr);
  gap: 16px;
  padding: 14px;
  height: 100vh;
  animation: introUp 0.72s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.deck-sidebar,
.main-stage {
  border-radius: 20px;
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  box-shadow: var(--shadow-soft), inset 0 1px 0 var(--panel-inset);
  backdrop-filter: blur(18px) saturate(120%);
  transition: border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
}

.deck-sidebar {
  position: relative;
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
}

.deck-sidebar::before {
  content: "";
  position: absolute;
  inset: -35% -25% auto;
  height: 220px;
  background: var(--sidebar-glow);
  filter: blur(10px);
  pointer-events: none;
}

.brand {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.sidebar-header h1 {
  margin: 7px 0 4px;
  font-size: 1.32rem;
  font-weight: 630;
}

.sidebar-header .note {
  margin: 0;
  color: var(--text-sub);
  font-size: 0.84rem;
}

.search-box {
  display: grid;
  gap: 7px;
  color: var(--text-sub);
  font-size: 0.8rem;
}

.search-box input {
  border: 1px solid var(--panel-border-soft);
  border-radius: 11px;
  padding: 10px 12px;
  background: var(--search-bg);
  color: var(--text-main);
  outline: none;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.search-box input:focus {
  border-color: var(--search-focus-border);
  box-shadow: 0 0 0 3px var(--search-focus-ring);
}

.deck-list {
  overflow-y: auto;
  display: grid;
  gap: 9px;
  padding-right: 2px;
}

.deck-list::-webkit-scrollbar,
.thumbs::-webkit-scrollbar {
  height: 10px;
  width: 10px;
}

.deck-list::-webkit-scrollbar-thumb,
.thumbs::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

.deck-card {
  text-align: left;
  border: 1px solid var(--card-border);
  border-radius: 13px;
  background: var(--card-bg);
  padding: 11px 12px;
  cursor: pointer;
  color: var(--text-main);
  transition: transform 0.26s ease, border-color 0.26s ease, box-shadow 0.26s ease;
}

.deck-card:hover {
  transform: translateY(-2px);
  border-color: var(--card-hover-border);
  box-shadow: var(--card-hover-shadow);
}

.deck-card.active {
  border-color: var(--card-active-border);
  box-shadow: var(--card-active-shadow), inset 0 0 0 1px var(--card-active-inset);
}

.deck-card strong {
  display: block;
  font-size: 0.93rem;
  font-weight: 620;
}

.deck-card small {
  display: block;
  margin-top: 5px;
  color: var(--text-dim);
  font-size: 0.74rem;
}

.main-stage {
  position: relative;
  padding: 12px;
  display: grid;
  grid-template-rows: auto minmax(340px, 1fr) auto auto;
  gap: 12px;
}

.main-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: var(--main-sheen);
}

.stage-top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
}

.deck-title-wrap h2 {
  margin: 0;
  font-size: 1.27rem;
  font-weight: 620;
}

.deck-title-wrap p {
  margin: 5px 0 0;
  color: var(--text-sub);
  font-size: 0.84rem;
}

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

.theme-switch {
  display: inline-flex;
  align-items: center;
  padding: 3px;
  border-radius: 999px;
  border: 1px solid var(--theme-switch-border);
  background: var(--theme-switch-bg);
  gap: 3px;
}

.theme-btn {
  border: 0;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  color: var(--text-sub);
  background: transparent;
  transition: background 0.24s ease, color 0.24s ease, transform 0.2s ease;
}

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

.theme-btn.active {
  color: var(--theme-active-text);
  background: var(--theme-active-bg);
}

.ghost-btn,
.solid-btn {
  border-radius: 11px;
  border: 1px solid var(--btn-ghost-border);
  background: var(--btn-ghost-bg);
  color: var(--text-main);
  cursor: pointer;
  padding: 8px 12px;
  font-size: 0.83rem;
  transition: border-color 0.24s ease, background 0.24s ease, color 0.24s ease, transform 0.2s ease;
}

.ghost-btn:hover {
  border-color: var(--btn-ghost-hover-border);
  background: var(--btn-ghost-hover-bg);
  transform: translateY(-1px);
}

.ghost-btn:disabled,
.solid-btn:disabled {
  opacity: 0.42;
  cursor: default;
  transform: none;
}

.solid-btn {
  border-color: transparent;
  background: var(--btn-solid-bg);
  color: var(--btn-solid-text);
  font-weight: 700;
}

.solid-btn:hover {
  transform: translateY(-1px) scale(1.01);
}

.solid-btn.playing {
  background: var(--btn-solid-playing-bg);
  color: var(--btn-solid-playing-text);
}

.mobile-only {
  display: none;
}

.stage-frame {
  position: relative;
  z-index: 2;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--stage-border);
  background: var(--stage-bg);
  box-shadow: var(--shadow-hard), inset 0 0 80px var(--stage-inset-shadow);
  transition: border-color 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
}

.stage-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: var(--stage-overlay);
}

.cosmic-rings {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: var(--ring-opacity);
}

.ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 1px solid var(--ring-1-border);
  transform: translate(-50%, -50%);
}

.ring-1 {
  width: min(72vw, 68vh);
  height: min(72vw, 68vh);
  animation: spinSlow 42s linear infinite;
}

.ring-2 {
  width: min(56vw, 52vh);
  height: min(56vw, 52vh);
  border-color: var(--ring-2-border);
  animation: spinSlowReverse 30s linear infinite;
}

.ring-3 {
  width: min(40vw, 38vh);
  height: min(40vw, 38vh);
  border-color: var(--ring-3-border);
  animation: pulseRing 7s ease-in-out infinite;
}

.slide {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transform: translateX(0) scale(1.008);
  transition:
    opacity 0.5s ease,
    transform 0.66s cubic-bezier(0.22, 0.82, 0.2, 1),
    filter 0.5s ease;
  filter: var(--slide-shadow);
}

.slide.active {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.slide.pre-right {
  transform: translateX(46px) scale(1.018);
}

.slide.pre-left {
  transform: translateX(-46px) scale(1.018);
}

.hot-area {
  position: absolute;
  top: 0;
  bottom: 12px;
  z-index: 3;
  width: 23%;
  border: none;
  background: transparent;
  cursor: pointer;
}

.hot-left {
  left: 0;
}

.hot-right {
  right: 0;
}

.hot-left:hover {
  background: var(--hot-left-hover);
}

.hot-right:hover {
  background: var(--hot-right-hover);
}

.progress-track {
  position: absolute;
  z-index: 4;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--progress-track);
}

.progress-track span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--progress-bar);
  box-shadow: 0 0 16px var(--progress-glow);
  transition: width 0.24s ease;
}

.controls {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 10px;
}

.ctrl-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.speed-box {
  margin-left: 6px;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--text-sub);
  font-size: 0.8rem;
}

.speed-box select {
  border-radius: 9px;
  border: 1px solid var(--select-border);
  background: var(--select-bg);
  color: var(--text-main);
  padding: 6px 8px;
}

.range-box {
  width: 100%;
  display: grid;
  gap: 7px;
}

.range-box span {
  color: var(--text-sub);
  font-size: 0.84rem;
}

#slide-range {
  width: 100%;
  accent-color: var(--accent);
}

.shortcut-tip {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.76rem;
}

.shortcut-tip code {
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid var(--kbd-border);
  background: var(--kbd-bg);
  color: var(--text-main);
  margin-right: 2px;
}

.thumbs {
  position: relative;
  z-index: 2;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 128px;
  gap: 9px;
  overflow-x: auto;
}

.thumb {
  border: 1px solid var(--thumb-border);
  border-radius: 11px;
  overflow: hidden;
  background: var(--thumb-bg);
  cursor: pointer;
  padding: 0;
  transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.thumb:hover {
  transform: translateY(-2px);
  border-color: var(--thumb-hover-border);
}

.thumb.active {
  border-color: var(--thumb-active-border);
  box-shadow: 0 0 0 2px var(--thumb-active-shadow);
}

.thumb img {
  width: 100%;
  height: 72px;
  object-fit: cover;
  display: block;
}

.thumb span {
  display: block;
  padding: 4px 7px 6px;
  font-size: 0.71rem;
  color: var(--text-sub);
}

.empty {
  position: relative;
  z-index: 2;
  border: 1px dashed var(--empty-border);
  border-radius: 14px;
  padding: 16px;
}

.empty h3 {
  margin: 0 0 6px;
}

.empty p {
  margin: 0;
  color: var(--text-sub);
}

.empty code {
  background: var(--empty-code-bg);
  border: 1px solid var(--empty-code-border);
  border-radius: 6px;
  padding: 1px 6px;
}

.hidden {
  display: none !important;
}

@keyframes introUp {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.992);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes nebulaDrift {
  from {
    transform: translate3d(-2%, -1%, 0) scale(1);
  }
  to {
    transform: translate3d(2%, 1%, 0) scale(1.04);
  }
}

@keyframes starPulse {
  from {
    opacity: 0.42;
  }
  to {
    opacity: 0.64;
  }
}

@keyframes spinSlow {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@keyframes spinSlowReverse {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(-360deg);
  }
}

@keyframes pulseRing {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.34;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.03);
    opacity: 0.56;
  }
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
    padding: 10px;
  }

  .deck-sidebar {
    position: fixed;
    left: 10px;
    right: 10px;
    top: 10px;
    z-index: 30;
    max-height: 72vh;
    transform: translateY(-130%);
    transition: transform 0.32s ease;
  }

  body.sidebar-open .deck-sidebar {
    transform: translateY(0);
  }

  .mobile-only {
    display: inline-block;
  }

  .main-stage {
    min-height: calc(100vh - 20px);
  }

  .stage-frame {
    min-height: 49vh;
  }

  .hot-area {
    width: 31%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}