/*
 * Quantum Pong - menu UI (QP.UI, js/ui/menus.js).
 * Neon-dark "quantum lab" look: glowing cyan (left detector) / magenta (right detector),
 * monospace numerals, glass panels. Responsive from phone landscape (640x360 CSS px) to desktop.
 * Motion: short opacity/transform transitions only; all of it is disabled by
 * prefers-reduced-motion or by settings.reduceMotion (root class .qp-rm).
 */

/* ------------------------------------------------------------------ *
 * Tokens & root
 * ------------------------------------------------------------------ */
.qp-ui {
  --qp-bg: #05060d;
  --qp-a: #38e8ff;
  --qp-b: #ff4fd8;
  --qp-mid: #9b7bff;
  --qp-a-rgb: 56, 232, 255;
  --qp-b-rgb: 255, 79, 216;
  --qp-gold: #ffd24a;
  --qp-good: #5dffb0;
  --qp-bad: #ff5d7a;
  --qp-text: #eaf4ff;
  --qp-dim: #98a8c6;
  --qp-faint: #5f6d8c;
  --qp-panel: rgba(12, 16, 34, 0.78);
  --qp-panel-hi: rgba(17, 22, 46, 0.94);
  --qp-line: rgba(140, 190, 255, 0.14);
  --qp-line-hi: rgba(150, 200, 255, 0.30);
  --qp-radius: 14px;
  --qp-ease: cubic-bezier(.2, .8, .2, 1);
  --qp-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --qp-mono: ui-monospace, "SFMono-Regular", "Roboto Mono", "Cascadia Mono", Consolas, "Liberation Mono", "Droid Sans Mono", monospace;
  --qp-sym: "Segoe UI Symbol", "Noto Sans Symbols", "Noto Sans Math", "Cambria Math", "DejaVu Sans", var(--qp-sans);
  --c-rgb: var(--qp-a-rgb);
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  z-index: 30;
  overflow: hidden;
  pointer-events: none;
  font-family: var(--qp-sans);
  font-size: 13px;
  line-height: 1.35;
  color: var(--qp-text);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}
.qp-ui *, .qp-ui *::before, .qp-ui *::after { box-sizing: border-box; }
.qp-ui [hidden] { display: none !important; }
.qp-ui .qp-nc { text-transform: none; letter-spacing: .04em; }
.qp-ui.qp-theme-colorblind { --qp-a: #3fb6ff; --qp-b: #ffa63a; --qp-mid: #c9b6ff; --qp-a-rgb: 63, 182, 255; --qp-b-rgb: 255, 166, 58; }
.qp-ui.qp-theme-mono { --qp-a: #e8eef8; --qp-b: #a9b6cc; --qp-mid: #ccd5e4; --qp-a-rgb: 232, 238, 248; --qp-b-rgb: 169, 182, 204; }

@media (min-width: 900px) and (min-height: 500px) { .qp-ui { font-size: 14px; } }
@media (min-width: 1180px) and (min-height: 600px) { .qp-ui { font-size: 15px; } }
@media (min-width: 1600px) and (min-height: 860px) { .qp-ui { font-size: 17px; } }
@media (max-height: 380px) { .qp-ui { font-size: 12.5px; } }

.qp-screens { position: absolute; left: 0; top: 0; right: 0; bottom: 0; }

/* ------------------------------------------------------------------ *
 * Screens & transitions
 * ------------------------------------------------------------------ */
.qp-screen {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  padding: 10px 16px 12px;
  padding-top: max(10px, env(safe-area-inset-top));
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  opacity: 0;
  transform: translateY(10px) scale(.985);
  transition: opacity .22s ease, transform .32s var(--qp-ease);
  pointer-events: none;
}
.qp-screen.qp-active { opacity: 1; transform: none; pointer-events: auto; }
.qp-screen.qp-leaving { opacity: 0; transform: translateY(-6px) scale(1.01); pointer-events: none; transition-duration: .18s, .22s; }

/* Opaque-ish lab backdrop for every full screen (title stays translucent). */
.qp-full {
  background:
    radial-gradient(900px 520px at 12% -12%, rgba(var(--qp-a-rgb), .13), transparent 62%),
    radial-gradient(800px 520px at 108% 112%, rgba(var(--qp-b-rgb), .12), transparent 60%),
    rgba(5, 6, 13, .90);
}
.qp-full::before {
  content: '';
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(var(--qp-a-rgb), .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--qp-a-rgb), .045) 1px, transparent 1px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 85%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, #000 30%, transparent 85%);
}
.qp-full > * { position: relative; }

/* ------------------------------------------------------------------ *
 * Header / body / footer
 * ------------------------------------------------------------------ */
.qp-head, .qp-body, .qp-foot { width: 100%; max-width: 1160px; margin-left: auto; margin-right: auto; }
.qp-head {
  display: flex;
  align-items: center;
  gap: .9em;
  min-height: 46px;
  flex: 0 0 auto;
  padding-bottom: .5em;
}
.qp-titles { flex: 1 1 auto; min-width: 0; }
.qp-title {
  margin: 0;
  font-size: 1.5em;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #f4fbff;
  text-shadow: 0 0 14px rgba(var(--qp-a-rgb), .55), 0 0 2px rgba(var(--qp-a-rgb), .9);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.15;
}
.qp-sub {
  margin-top: .15em;
  font-size: .74em;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--qp-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.qp-head-extra { flex: 0 0 auto; display: flex; align-items: center; gap: .6em; }
.qp-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: .3em 4px .6em;
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--qp-a-rgb), .35) transparent;
}
.qp-body::-webkit-scrollbar, .qp-col::-webkit-scrollbar { width: 6px; height: 6px; }
.qp-body::-webkit-scrollbar-thumb, .qp-col::-webkit-scrollbar-thumb { background: rgba(var(--qp-a-rgb), .3); border-radius: 6px; }
.qp-body::-webkit-scrollbar-track, .qp-col::-webkit-scrollbar-track { background: transparent; }
.qp-body--center { display: flex; flex-direction: column; justify-content: center; }
.qp-foot {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .7em;
  padding-top: .6em;
  border-top: 1px solid var(--qp-line);
}

/* ------------------------------------------------------------------ *
 * Buttons
 * ------------------------------------------------------------------ */
.qp-btn {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  min-height: 44px;
  padding: 0 1.25em;
  margin: 0;
  border: 1px solid var(--qp-line-hi);
  border-radius: 12px;
  background: rgba(255, 255, 255, .035);
  color: var(--qp-text);
  font: inherit;
  font-size: .9em;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform .12s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease, color .18s ease;
}
.qp-btn .qp-ico { width: 1.35em; height: 1.35em; flex: 0 0 auto; }
.qp-btn:active { transform: scale(.96); }
.qp-btn:focus { outline: none; }
.qp-btn:focus-visible, .qp-seg-btn:focus-visible, .qp-arena:focus-visible, .qp-mode-card:focus-visible,
.qp-switch:focus-visible, .qp-navbtn:focus-visible, .qp-range:focus-visible {
  outline: 2px solid var(--qp-a);
  outline-offset: 3px;
}
.qp-btn[disabled] { opacity: .32; pointer-events: none; }
@media (hover: hover) {
  .qp-btn:hover { border-color: rgba(var(--qp-a-rgb), .65); background-color: rgba(var(--qp-a-rgb), .09); box-shadow: 0 0 16px rgba(var(--qp-a-rgb), .2); }
}
.qp-btn--primary {
  border-color: rgba(var(--qp-a-rgb), .85);
  background: linear-gradient(135deg, rgba(var(--qp-a-rgb), .30), rgba(var(--qp-b-rgb), .24));
  box-shadow: 0 0 22px rgba(var(--qp-a-rgb), .26), inset 0 0 14px rgba(var(--qp-a-rgb), .16);
  color: #fff;
  text-shadow: 0 0 10px rgba(var(--qp-a-rgb), .85);
}
@media (hover: hover) {
  .qp-btn--primary:hover { background: linear-gradient(135deg, rgba(var(--qp-a-rgb), .42), rgba(var(--qp-b-rgb), .34)); box-shadow: 0 0 30px rgba(var(--qp-a-rgb), .4), inset 0 0 16px rgba(var(--qp-a-rgb), .22); }
}
.qp-btn--big { min-height: 56px; padding: 0 2.3em; font-size: 1.18em; letter-spacing: .26em; border-radius: 16px; }
.qp-btn--wide { width: 100%; min-height: 50px; font-size: 1.02em; letter-spacing: .22em; }
.qp-btn--grow { flex: 1 1 auto; }
.qp-btn--small { min-height: 36px; padding: 0 .95em; font-size: .78em; border-radius: 10px; }
.qp-btn--icon { width: 44px; min-width: 44px; padding: 0; border-radius: 50%; }
.qp-btn--icon .qp-ico { width: 1.45em; height: 1.45em; }
.qp-btn--warn { color: #ffd0e6; border-color: rgba(var(--qp-b-rgb), .45); }
@media (hover: hover) { .qp-btn--warn:hover { border-color: rgba(var(--qp-b-rgb), .8); background-color: rgba(var(--qp-b-rgb), .1); box-shadow: 0 0 16px rgba(var(--qp-b-rgb), .25); } }
.qp-btn--danger { color: #ffb3c1; border-color: rgba(255, 93, 122, .45); }
.qp-btn--danger.qp-armed { color: #fff; background: rgba(255, 93, 122, .3); border-color: #ff5d7a; box-shadow: 0 0 16px rgba(255, 93, 122, .45); }
.qp-btn-stack { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.15; }
.qp-btn-small { font-size: .74em; letter-spacing: .08em; text-transform: none; font-weight: 600; color: var(--qp-dim); margin-top: .15em; }

/* Shimmer sweeping across the big PLAY button. */
.qp-btn--shine { overflow: hidden; }
.qp-btn--shine::after {
  content: '';
  position: absolute;
  top: -20%; bottom: -20%;
  left: -40%;
  width: 30%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .28), transparent);
  transform: translateX(-120%) skewX(-18deg);
  animation: qp-shine 3.6s ease-in-out 1.2s infinite;
  pointer-events: none;
}
@keyframes qp-shine {
  0% { transform: translateX(-120%) skewX(-18deg); }
  55%, 100% { transform: translateX(560%) skewX(-18deg); }
}

/* ------------------------------------------------------------------ *
 * Icons
 * ------------------------------------------------------------------ */
.qp-ico { width: 1.4em; height: 1.4em; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; display: block; }
.qp-ico .qp-fill { fill: currentColor; stroke: none; }

/* ------------------------------------------------------------------ *
 * Title screen (translucent: the attract match shows behind it)
 * ------------------------------------------------------------------ */
.qp-screen--title {
  align-items: center;
  justify-content: space-between;
  background:
    radial-gradient(ellipse 70% 62% at 50% 40%, rgba(5, 6, 13, .30), rgba(5, 6, 13, .58) 62%, rgba(5, 6, 13, .84) 100%),
    linear-gradient(180deg, rgba(5, 6, 13, 0) 60%, rgba(5, 6, 13, .55) 100%);
}
.qp-title-main {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.6vh;
  width: 100%;
}
.qp-logo { display: flex; justify-content: center; max-width: 100%; }
.qp-logo-box { position: relative; flex: 0 0 auto; line-height: 0; max-width: 100%; }
.qp-logo-svg { display: block; height: 40vh; max-height: 300px; width: auto; max-width: 84vw; overflow: visible; }
/* Same viewBox and box as the base SVG, so both map identically even when letterboxed. */
.qp-logo-fx { position: absolute; left: 0; top: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; will-change: transform; }
.qp-logo--small .qp-logo-box { width: 100%; max-width: 260px; }
.qp-logo--small .qp-logo-svg { height: auto; width: 100%; max-width: none; max-height: none; }
.qp-logo-box .qp-sa { stop-color: var(--qp-a); }
.qp-logo-box .qp-sm { stop-color: var(--qp-mid); }
.qp-logo-box .qp-sb { stop-color: var(--qp-b); }
.qp-logo-core { opacity: .78; }
.qp-orb-wave { animation: qp-orb-wave 1.3s linear infinite; }
@keyframes qp-orb-wave { from { transform: translateX(0); } to { transform: translateX(12px); } }
.qp-logo-orb { opacity: .95; }
.qp-anim-ignite .qp-logo-tubes, .qp-anim-ignite .qp-logo-core { animation: qp-ignite 1.5s ease-out both; }
.qp-anim-ignite .qp-logo-orb { animation: qp-fade 1.2s ease-out .45s both; }
.qp-anim-ignite .qp-tagline { animation: qp-fade .9s ease-out .7s both; }
.qp-anim-ignite .qp-cta, .qp-anim-ignite .qp-title-nav { animation: qp-rise .7s var(--qp-ease) .85s both; }
@keyframes qp-ignite {
  0% { opacity: 0; }
  8% { opacity: .85; }
  11% { opacity: .15; }
  19% { opacity: 1; }
  23% { opacity: .45; }
  32% { opacity: 1; }
  100% { opacity: 1; }
}
@keyframes qp-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes qp-rise { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.qp-tagline {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 1em;
  font-size: .95em;
  font-weight: 600;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: rgba(234, 244, 255, .86);
  text-shadow: 0 0 12px rgba(var(--qp-a-rgb), .55);
  text-align: center;
  padding-left: .42em;
}
.qp-tagline::before, .qp-tagline::after {
  content: '';
  width: 3.2em;
  height: 1px;
  flex: 0 0 auto;
  background: linear-gradient(90deg, transparent, rgba(var(--qp-a-rgb), .8));
}
.qp-tagline::after { background: linear-gradient(90deg, rgba(var(--qp-b-rgb), .8), transparent); }
.qp-cta { display: flex; align-items: center; justify-content: center; gap: .9em; margin-top: 1.2vh; flex-wrap: wrap; }
.qp-btn--quick { min-height: 56px; padding: 0 1.3em; border-radius: 16px; background: rgba(5, 6, 13, .55); }
.qp-btn--quick .qp-ico { color: var(--qp-gold); }
.qp-title-nav { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; flex: 0 0 auto; padding-top: 6px; }
.qp-navbtn {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 72px;
  min-height: 52px;
  padding: 6px 10px;
  border-radius: 12px;
  border: 1px solid var(--qp-line);
  background: rgba(5, 6, 13, .55);
  color: var(--qp-dim);
  font: inherit;
  font-size: .68em;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  cursor: pointer;
  touch-action: manipulation;
  transition: color .18s, border-color .18s, background-color .18s, transform .12s, box-shadow .18s;
}
.qp-navbtn .qp-ico { width: 21px; height: 21px; }
.qp-navbtn { position: relative; }
.qp-navbtn--new { color: #fff; border-color: rgba(var(--qp-b-rgb), .5); }
.qp-navbtn--new::after {
  content: '';
  position: absolute;
  top: 6px; right: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--qp-b);
  box-shadow: 0 0 8px var(--qp-b);
}
.qp-navbtn:active { transform: scale(.95); }
.qp-navbtn:focus { outline: none; }
@media (hover: hover) { .qp-navbtn:hover { color: #fff; border-color: rgba(var(--qp-a-rgb), .55); box-shadow: 0 0 14px rgba(var(--qp-a-rgb), .2); } }

/* ------------------------------------------------------------------ *
 * Mode cards
 * ------------------------------------------------------------------ */
.qp-modes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
}
.qp-mode-card {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: .35em;
  min-height: 0;
  padding: .9em .95em 1em;
  border-radius: 18px;
  border: 1px solid rgba(var(--c-rgb), .32);
  background:
    radial-gradient(120% 70% at 50% 0%, rgba(var(--c-rgb), .16), transparent 70%),
    linear-gradient(180deg, rgba(16, 21, 44, .92), rgba(9, 12, 26, .94));
  color: var(--qp-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  touch-action: manipulation;
  box-shadow: 0 12px 28px rgba(0, 0, 0, .35);
  transition: transform .18s var(--qp-ease), border-color .18s, box-shadow .18s;
  animation: qp-rise .5s var(--qp-ease) both;
}
.qp-mode-card::after {
  content: '';
  position: absolute;
  left: 12%; right: 12%; top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(var(--c-rgb), .95), transparent);
  box-shadow: 0 0 12px rgba(var(--c-rgb), .8);
}
.qp-mode-card:active { transform: scale(.97); }
.qp-mode-card:focus { outline: none; }
@media (hover: hover) {
  .qp-mode-card:hover { transform: translateY(-3px); border-color: rgba(var(--c-rgb), .75); box-shadow: 0 16px 34px rgba(0, 0, 0, .45), 0 0 26px rgba(var(--c-rgb), .22); }
}
.qp-mode-art { height: 5.4em; margin: -.1em -.2em .2em; color: rgb(var(--c-rgb)); }
.qp-mode-tag { font-size: .66em; font-weight: 800; letter-spacing: .2em; text-transform: uppercase; color: rgb(var(--c-rgb)); }
.qp-mode-name { font-size: 1.16em; font-weight: 800; letter-spacing: .04em; color: #fff; line-height: 1.15; }
.qp-mode-desc { flex: 1 1 auto; font-size: .82em; line-height: 1.42; color: var(--qp-dim); }
.qp-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: .35em; }
.qp-chip {
  font-size: .62em;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .32em .65em;
  border-radius: 99px;
  border: 1px solid rgba(var(--c-rgb), .38);
  color: rgba(var(--c-rgb), 1);
  background: rgba(var(--c-rgb), .07);
}
.qp-mode-tagrow { display: flex; align-items: center; justify-content: space-between; gap: .5em; min-width: 0; }
.qp-mode-tagrow .qp-mode-tag { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.qp-mode-badge {
  display: none;              /* only on wide layouts, where the art leaves the corner free */
  position: absolute;
  top: .8em; right: .8em;
  font-family: var(--qp-mono);
  font-size: .64em;
  padding: .15em .5em;
  border-radius: 99px;
  color: #fff;
  background: rgba(var(--c-rgb), .22);
  border: 1px solid rgba(var(--c-rgb), .55);
  white-space: nowrap;
}

/* Mode illustrations */
.qp-art { display: block; width: 100%; height: 100%; overflow: visible; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.qp-art .qp-sa { stop-color: var(--qp-a); }
.qp-art .qp-sb { stop-color: var(--qp-b); }
.qp-art-wave { stroke-width: 2.4; filter: drop-shadow(0 0 4px rgba(var(--c-rgb), .7)); }
.qp-art-env { stroke: currentColor; stroke-width: 1; stroke-dasharray: 2 3; opacity: .45; }
.qp-art-pa { fill: var(--qp-a); filter: drop-shadow(0 0 5px var(--qp-a)); }
.qp-art-pb { fill: var(--qp-b); filter: drop-shadow(0 0 5px var(--qp-b)); }
.qp-art-mag { fill: rgba(var(--c-rgb), .22); stroke: currentColor; stroke-width: 1.4; }
.qp-art-txt { fill: currentColor; font: 700 8px var(--qp-sans); text-anchor: middle; opacity: .9; }
.qp-art-beam { stroke-width: 2.6; }
.qp-art-a { stroke: var(--qp-a); filter: drop-shadow(0 0 3px var(--qp-a)); }
.qp-art-b { stroke: var(--qp-b); filter: drop-shadow(0 0 3px var(--qp-b)); }
.qp-art-fa { fill: var(--qp-a); }
.qp-art-fb { fill: var(--qp-b); }
.qp-art-arrow { stroke-width: 2; }
.qp-art-link { stroke: currentColor; stroke-width: 1.4; stroke-dasharray: 3 3; opacity: .75; }
.qp-art-halo { stroke: currentColor; stroke-width: 1.2; opacity: .5; }
.qp-art-src { fill: currentColor; filter: drop-shadow(0 0 5px currentColor); }
.qp-art-grid { fill: currentColor; opacity: .35; }
.qp-art-band { stroke: var(--qp-dim); stroke-width: 1.6; stroke-dasharray: 2 3; }
.qp-art-finger { stroke: currentColor; stroke-width: 1.6; }
.qp-art-traj { stroke: currentColor; stroke-width: 2; stroke-dasharray: 5 4; }

/* ------------------------------------------------------------------ *
 * Form-ish controls
 * ------------------------------------------------------------------ */
.qp-field { margin: 0 0 .95em; }
.qp-label {
  display: block;
  margin: 0 0 .5em;
  font-size: .7em;
  font-weight: 800;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--qp-dim);
}
.qp-hint { margin-top: .5em; min-height: 1.35em; font-size: .8em; line-height: 1.4; color: var(--qp-dim); }
.qp-seg { display: flex; flex-wrap: wrap; gap: 6px; }
.qp-seg-btn {
  -webkit-appearance: none;
  appearance: none;
  flex: 1 1 0;
  min-width: 3.2em;
  min-height: 42px;
  padding: 0 .7em;
  border-radius: 11px;
  border: 1px solid var(--qp-line-hi);
  background: rgba(255, 255, 255, .03);
  color: var(--qp-dim);
  font: inherit;
  font-size: .86em;
  font-weight: 700;
  letter-spacing: .05em;
  white-space: nowrap;
  cursor: pointer;
  touch-action: manipulation;
  transition: color .16s, background-color .16s, border-color .16s, box-shadow .16s, transform .12s;
}
.qp-seg-btn:active { transform: scale(.96); }
.qp-seg-btn:focus { outline: none; }
.qp-seg-btn[aria-pressed="true"] {
  color: #fff;
  border-color: rgba(var(--c-rgb), .95);
  background: rgba(var(--c-rgb), .17);
  box-shadow: 0 0 14px rgba(var(--c-rgb), .28), inset 0 0 10px rgba(var(--c-rgb), .14);
  text-shadow: 0 0 8px rgba(var(--c-rgb), .8);
}
@media (hover: hover) { .qp-seg-btn:hover { color: #fff; border-color: rgba(var(--c-rgb), .6); } }
.qp-seg--mono .qp-seg-btn { font-family: var(--qp-mono); font-size: .92em; letter-spacing: 0; }
.qp-seg--opp .qp-seg-btn { flex: 1 1 auto; }
.qp-seg-btn .qp-short { display: none; }
.qp-seg--small .qp-seg-btn { min-height: 36px; font-size: .8em; border-radius: 9px; }
.qp-seg--small.qp-seg--mono .qp-seg-btn { font-size: .86em; }

.qp-switch {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  flex: 0 0 auto;
  width: 50px;
  height: 28px;
  padding: 0;
  margin: 0;
  border-radius: 99px;
  border: 1px solid var(--qp-line-hi);
  background: rgba(255, 255, 255, .06);
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color .2s, border-color .2s, box-shadow .2s;
}
.qp-switch::before { content: ''; position: absolute; left: -10px; right: -10px; top: -10px; bottom: -10px; }
.qp-switch::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #7d8bab;
  transition: transform .22s var(--qp-ease), background-color .2s, box-shadow .2s;
}
.qp-switch:focus { outline: none; }
.qp-switch[aria-checked="true"] { background: rgba(var(--qp-a-rgb), .28); border-color: rgba(var(--qp-a-rgb), .9); box-shadow: 0 0 12px rgba(var(--qp-a-rgb), .32); }
.qp-switch[aria-checked="true"]::after { transform: translateX(22px); background: #fff; box-shadow: 0 0 8px var(--qp-a); }

.qp-range-box { display: flex; align-items: center; gap: .7em; flex: 0 1 auto; }
.qp-range {
  -webkit-appearance: none;
  appearance: none;
  --fill: 50%;
  width: 150px;
  height: 30px;
  margin: 0;
  background: transparent;
  cursor: pointer;
  touch-action: pan-y;
}
.qp-range:focus { outline: none; }
.qp-range::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--qp-a), var(--qp-b)) 0 0 / var(--fill) 100% no-repeat, rgba(255, 255, 255, .12);
}
.qp-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px; height: 22px;
  margin-top: -8px;
  border: none;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(var(--qp-a-rgb), .35), 0 0 12px var(--qp-a);
}
.qp-range::-moz-range-track { height: 6px; border-radius: 99px; background: rgba(255, 255, 255, .12); }
.qp-range::-moz-range-progress { height: 6px; border-radius: 99px; background: linear-gradient(90deg, var(--qp-a), var(--qp-b)); }
.qp-range::-moz-range-thumb { width: 22px; height: 22px; border: none; border-radius: 50%; background: #fff; box-shadow: 0 0 0 3px rgba(var(--qp-a-rgb), .35), 0 0 12px var(--qp-a); }
.qp-val { font-family: var(--qp-mono); min-width: 3.2em; text-align: right; color: var(--qp-a); font-size: .9em; }

.qp-panel {
  background: var(--qp-panel);
  border: 1px solid var(--qp-line);
  border-radius: var(--qp-radius);
  padding: .85em 1em;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .3), inset 0 1px 0 rgba(255, 255, 255, .03);
}
.qp-note { color: var(--qp-dim); font-size: .82em; line-height: 1.45; }

/* ------------------------------------------------------------------ *
 * Setup
 * ------------------------------------------------------------------ */
.qp-body--split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  gap: 0 22px;
  overflow: hidden;
  padding-right: 0;
}
.qp-col { min-height: 0; overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; padding: .2em 6px .4em 2px; scrollbar-width: thin; scrollbar-color: rgba(var(--qp-a-rgb), .35) transparent; }
.qp-arenas { display: grid; grid-template-columns: 1fr; gap: 7px; }
.qp-arena {
  -webkit-appearance: none;
  appearance: none;
  display: flex;
  align-items: center;
  gap: .8em;
  width: 100%;
  min-height: 50px;
  padding: .5em .75em;
  border-radius: 12px;
  border: 1px solid var(--qp-line);
  background: rgba(255, 255, 255, .025);
  color: var(--qp-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
  transition: border-color .16s, background-color .16s, box-shadow .16s, transform .12s;
}
.qp-arena:active { transform: scale(.985); }
.qp-arena:focus { outline: none; }
@media (hover: hover) { .qp-arena:hover { border-color: rgba(var(--c-rgb), .55); } }
.qp-arena[aria-pressed="true"] {
  border-color: rgba(var(--c-rgb), .95);
  background: linear-gradient(90deg, rgba(var(--c-rgb), .17), rgba(var(--c-rgb), .04));
  box-shadow: 0 0 16px rgba(var(--c-rgb), .22), inset 0 0 12px rgba(var(--c-rgb), .08);
}
.qp-arena-pic { flex: 0 0 auto; width: 58px; height: 31px; color: rgb(var(--c-rgb)); }
.qp-arena-text { display: flex; flex-direction: column; min-width: 0; gap: .12em; }
.qp-arena-name { font-weight: 800; font-size: .92em; letter-spacing: .04em; color: #fff; }
.qp-arena-desc {
  font-size: .76em;
  line-height: 1.35;
  color: var(--qp-dim);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.qp-pic { display: block; width: 100%; height: 100%; fill: none; stroke-linecap: round; }
.qp-pic-frame { stroke: rgba(150, 200, 255, .35); stroke-width: 1.2; fill: rgba(5, 6, 13, .6); }
.qp-pic-da { stroke: var(--qp-a); stroke-width: 2; opacity: .85; }
.qp-pic-db { stroke: var(--qp-b); stroke-width: 2; opacity: .85; }
.qp-pic-bar { stroke: #ffb347; stroke-width: 2.6; }
.qp-pic-wall { stroke: #ffb347; stroke-width: 3; }
.qp-pic-well { fill: rgba(80, 150, 255, .35); stroke: #6aa8ff; stroke-width: 1; }
.qp-pic-bump { fill: rgba(255, 179, 71, .5); stroke: #ffb347; stroke-width: 1; }
.qp-pic-arrow { stroke: var(--qp-dim); stroke-width: 1.4; stroke-linejoin: round; }
.qp-pic-mag { fill: rgba(160, 128, 255, .3); stroke: #a080ff; stroke-width: 1; }
.qp-pic-prec { fill: rgba(93, 255, 176, .2); stroke: #5dffb0; stroke-width: 1; }
.qp-pic-src { fill: var(--qp-gold); }
.qp-pic-pk { fill: currentColor; }
.qp-labtools { margin-bottom: .95em; padding: .75em .95em; }
.qp-preview { display: flex; gap: 1em; align-items: center; margin-top: .2em; padding: .8em .95em; border-color: rgba(var(--c-rgb), .25); }
.qp-preview-pic { flex: 0 0 auto; width: 112px; height: 60px; color: rgb(var(--c-rgb)); filter: drop-shadow(0 0 6px rgba(var(--c-rgb), .35)); }
.qp-preview-text { min-width: 0; }
.qp-preview-text .qp-label { margin-bottom: .25em; }
.qp-preview-name { font-weight: 800; font-size: 1.02em; color: #fff; letter-spacing: .04em; }
.qp-preview-desc { margin-top: .2em; font-size: .8em; line-height: 1.45; color: var(--qp-dim); }
.qp-list { margin: 0; padding: 0 0 0 1.1em; color: var(--qp-dim); font-size: .82em; line-height: 1.6; }
.qp-list b { color: #fff; font-weight: 700; }
.qp-summary {
  flex: 1 1 auto;
  min-width: 0;
  font-size: .8em;
  letter-spacing: .06em;
  color: var(--qp-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.qp-btn--start { min-height: 50px; padding: 0 2em; font-size: 1em; letter-spacing: .2em; }

/* ------------------------------------------------------------------ *
 * Settings
 * ------------------------------------------------------------------ */
.qp-settings { columns: 2 330px; column-gap: 14px; }
.qp-set-section {
  display: block;
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
  page-break-inside: avoid;
  margin: 0 0 14px;
  padding: .5em 1em .4em;
}
.qp-set-title {
  display: flex;
  align-items: center;
  gap: .55em;
  margin: .25em 0 .3em;
  font-size: .72em;
  font-weight: 800;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--qp-a);
}
.qp-set-title .qp-ico { width: 1.5em; height: 1.5em; }
.qp-set-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: .45em 0;
  border-top: 1px solid var(--qp-line);
}
.qp-set-title + .qp-set-row { border-top: none; }
.qp-set-row--stack { flex-direction: column; align-items: stretch; gap: .45em; }
.qp-set-text { min-width: 0; flex: 1 1 auto; }
.qp-set-label { font-weight: 700; font-size: .92em; color: #f2f8ff; }
.qp-set-hint { margin-top: .12em; font-size: .74em; line-height: 1.35; color: var(--qp-dim); }
.qp-remembered { color: var(--qp-a); }

/* ------------------------------------------------------------------ *
 * Primer
 * ------------------------------------------------------------------ */
.qp-body--stage { display: flex; flex-direction: column; }
.qp-primer-stage {
  position: relative;
  flex: 1 0 auto;
  touch-action: pan-y;
  -webkit-user-select: text;
  user-select: text;
  line-height: 1.5;
}
.qp-primer-stage h1, .qp-primer-stage h2, .qp-primer-stage h3 { margin: .2em 0 .5em; color: #fff; letter-spacing: .04em; text-shadow: 0 0 12px rgba(var(--qp-a-rgb), .4); }
.qp-primer-stage h2 { font-size: 1.3em; }
.qp-primer-stage h3 { font-size: 1.05em; }
.qp-primer-stage p { margin: 0 0 .7em; color: #d4e1f5; }
.qp-primer-stage b, .qp-primer-stage strong { color: #fff; }
.qp-primer-stage em { color: var(--qp-a); font-style: normal; }
.qp-primer-stage code, .qp-primer-stage .qp-math { font-family: var(--qp-mono); color: var(--qp-a); }
.qp-primer-stage canvas { max-width: 100%; }
.qp-primer-stage ul { margin: 0 0 .7em; padding-left: 1.2em; color: #d4e1f5; }
.qp-primer-fallback { max-width: 720px; margin: 0 auto; }
.qp-primer-fallback h3 { margin-top: .1em; }
.qp-counter { font-family: var(--qp-mono); font-size: .92em; color: var(--qp-a); letter-spacing: .08em; padding: .3em .7em; border: 1px solid rgba(var(--qp-a-rgb), .35); border-radius: 99px; }
.qp-counter:empty { display: none; }
.qp-dots { flex: 1 1 auto; display: flex; justify-content: center; align-items: center; gap: 6px; flex-wrap: wrap; min-width: 0; }
.qp-dot { width: 7px; height: 7px; border-radius: 50%; background: rgba(255, 255, 255, .16); transition: background-color .2s, transform .2s, box-shadow .2s; }
.qp-dot--seen { background: rgba(var(--qp-a-rgb), .45); }
.qp-dot--on { background: var(--qp-a); box-shadow: 0 0 8px var(--qp-a); transform: scale(1.35); }
.qp-btn--next .qp-ico { margin-right: -.3em; }

/* ------------------------------------------------------------------ *
 * Pause
 * ------------------------------------------------------------------ */
.qp-screen--pause { align-items: center; justify-content: center; background: rgba(3, 4, 10, .66); }
.qp-pause-card {
  width: 440px;
  max-width: 94vw;
  max-height: 100%;
  overflow-y: auto;
  padding: 1.1em 1.3em 1em;
  border-radius: 20px;
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(var(--qp-a-rgb), .12), transparent 70%),
    var(--qp-panel-hi);
  border: 1px solid rgba(var(--qp-a-rgb), .35);
  box-shadow: 0 0 44px rgba(var(--qp-a-rgb), .14), 0 24px 60px rgba(0, 0, 0, .55);
  text-align: center;
}
.qp-kicker { font-size: .7em; font-weight: 800; letter-spacing: .24em; text-transform: uppercase; color: var(--qp-dim); }
.qp-pause-title {
  margin: .1em 0 .3em;
  font-size: 2em;
  font-weight: 900;
  letter-spacing: .4em;
  padding-left: .4em;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 0 18px rgba(var(--qp-a-rgb), .7), 0 0 2px var(--qp-a);
}
.qp-pause-score { font-family: var(--qp-mono); font-size: 1.5em; font-weight: 700; margin: -.1em 0 .5em; }
.qp-pause-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 8px; }
.qp-tip { margin: .9em 0 0; font-size: .78em; line-height: 1.45; color: var(--qp-dim); text-align: left; padding: .6em .8em; border-radius: 10px; background: rgba(255, 255, 255, .03); border: 1px solid var(--qp-line); }
.qp-tip b { color: var(--qp-gold); letter-spacing: .14em; text-transform: uppercase; font-size: .9em; margin-right: .3em; }

/* ------------------------------------------------------------------ *
 * Results
 * ------------------------------------------------------------------ */
.qp-screen--results { padding-top: max(12px, env(safe-area-inset-top)); }
.qp-results {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: 22px;
}
.qp-results-hero { display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; min-height: 0; }
.qp-headline {
  margin: .05em 0 0;
  font-size: 2.9em;
  font-weight: 900;
  letter-spacing: .2em;
  padding-left: .2em;
  text-transform: uppercase;
  line-height: 1.05;
  color: #fff;
  text-shadow: 0 0 22px rgba(var(--qp-a-rgb), .75), 0 0 3px var(--qp-a);
  animation: qp-pop .6s var(--qp-ease) both;
}
.qp-outcome-loss .qp-headline { text-shadow: 0 0 22px rgba(var(--qp-b-rgb), .7), 0 0 3px var(--qp-b); }
.qp-outcome-right .qp-headline { text-shadow: 0 0 22px rgba(var(--qp-b-rgb), .75), 0 0 3px var(--qp-b); }
.qp-outcome-draw .qp-headline { text-shadow: 0 0 20px rgba(155, 123, 255, .7); }
.qp-outcome-win { background: radial-gradient(700px 420px at 25% 30%, rgba(var(--qp-a-rgb), .16), transparent 65%), radial-gradient(800px 520px at 108% 112%, rgba(var(--qp-b-rgb), .10), transparent 60%), rgba(5, 6, 13, .9); }
.qp-outcome-loss { background: radial-gradient(700px 420px at 25% 30%, rgba(var(--qp-b-rgb), .14), transparent 65%), rgba(5, 6, 13, .9); }
@keyframes qp-pop { from { opacity: 0; transform: scale(1.25); } 60% { opacity: 1; } to { opacity: 1; transform: none; } }
.qp-results-sub { margin: .45em 0 .2em; color: var(--qp-dim); font-size: .86em; }
.qp-scoreboard { display: flex; align-items: center; justify-content: center; gap: 1em; margin: .5em 0 1em; }
.qp-sb-side { display: flex; flex-direction: column; align-items: center; min-width: 5.5em; }
.qp-sb-score { font-family: var(--qp-mono); font-size: 3.1em; font-weight: 800; line-height: 1; }
.qp-sb-l .qp-sb-score { color: var(--qp-a); text-shadow: 0 0 16px rgba(var(--qp-a-rgb), .8); }
.qp-sb-r .qp-sb-score { color: var(--qp-b); text-shadow: 0 0 16px rgba(var(--qp-b-rgb), .8); }
.qp-sb-side:not(.qp-sb-won) .qp-sb-score { opacity: .55; text-shadow: none; }
.qp-sb-name { margin-top: .35em; font-size: .74em; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--qp-dim); max-width: 10em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qp-sb-won .qp-sb-name { color: #fff; }
.qp-sb-sep { font-family: var(--qp-mono); font-size: 2.2em; color: var(--qp-faint); margin-top: -.45em; }
.qp-results-actions { display: flex; gap: 10px; width: 100%; max-width: 380px; }
.qp-results-side {
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: .2em 6px .4em 2px;
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--qp-a-rgb), .35) transparent;
}
.qp-results-inner { margin-top: auto; margin-bottom: auto; }   /* centred when it fits, scrollable when not */
.qp-results-inner > .qp-field:last-child { margin-bottom: 0; }
.qp-results-side .qp-tiles { grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); }

/* Tiles */
.qp-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 8px; }
.qp-tiles--hero { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 1em; }
.qp-tiles--5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.qp-tiles--hero .qp-tile-val { font-size: 1.85em; }
.qp-tile {
  padding: .6em .75em .55em;
  border-radius: 12px;
  border: 1px solid var(--qp-line);
  background: linear-gradient(180deg, rgba(20, 26, 52, .78), rgba(11, 14, 30, .78));
  min-width: 0;
}
.qp-tile-val { font-family: var(--qp-mono); font-size: 1.3em; font-weight: 700; color: #fff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.qp-tile-label { margin-top: .2em; font-size: .68em; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--qp-dim); }
.qp-tile-note { margin-top: .15em; font-size: .7em; color: var(--qp-faint); }
.qp-tile--quantum { border-color: rgba(255, 210, 74, .55); box-shadow: 0 0 16px rgba(255, 210, 74, .16); }
.qp-tile--quantum .qp-tile-val { color: var(--qp-gold); text-shadow: 0 0 10px rgba(255, 210, 74, .6); }
.qp-tile--quantum .qp-tile-note { color: var(--qp-gold); }
.qp-pair { display: inline-flex; align-items: baseline; gap: .3em; }
.qp-l { color: var(--qp-a); }
.qp-r { color: var(--qp-b); }
.qp-pair-sep { color: var(--qp-faint); }

/* Progress bars */
.qp-bar { position: relative; height: 6px; border-radius: 99px; background: rgba(255, 255, 255, .1); overflow: hidden; flex: 1 1 auto; min-width: 60px; }
.qp-bar-fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 99px; background: linear-gradient(90deg, var(--qp-a), var(--qp-b)); box-shadow: 0 0 10px rgba(var(--qp-a-rgb), .6); }
.qp-head-progress { display: flex; align-items: center; gap: .7em; width: 200px; }
.qp-head-count { font-family: var(--qp-mono); color: var(--qp-a); font-size: .95em; white-space: nowrap; }
.qp-ach-progress { display: flex; align-items: center; gap: .9em; font-family: var(--qp-mono); font-size: .86em; color: var(--qp-text); padding: .7em .9em; border-radius: 12px; border: 1px solid var(--qp-line); background: rgba(255, 255, 255, .025); }
.qp-ach-progress > span { white-space: nowrap; }

/* ------------------------------------------------------------------ *
 * Achievements
 * ------------------------------------------------------------------ */
.qp-ach-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
.qp-ach {
  display: flex;
  align-items: center;
  gap: .8em;
  padding: .6em .75em;
  border-radius: 13px;
  border: 1px solid var(--qp-line);
  background: rgba(255, 255, 255, .025);
  min-width: 0;
  position: relative;
}
.qp-ach--on {
  border-color: rgba(var(--qp-a-rgb), .45);
  background: linear-gradient(90deg, rgba(var(--qp-a-rgb), .12), rgba(var(--qp-b-rgb), .05));
  box-shadow: 0 0 16px rgba(var(--qp-a-rgb), .1);
}
.qp-ach--off .qp-ach-name { color: #b9c5da; }
.qp-ach--off .qp-ach-desc { color: var(--qp-faint); }
.qp-ach--new {
  border-color: rgba(255, 210, 74, .6);
  background: linear-gradient(90deg, rgba(255, 210, 74, .14), rgba(var(--qp-b-rgb), .06));
  box-shadow: 0 0 20px rgba(255, 210, 74, .14);
  animation: qp-unlock .6s var(--qp-ease) both;
  margin-bottom: 8px;
}
@keyframes qp-unlock { from { opacity: 0; transform: translateX(18px) scale(.96); } to { opacity: 1; transform: none; } }
.qp-ach-text { min-width: 0; flex: 1 1 auto; }
.qp-ach-name { font-weight: 800; font-size: .9em; color: #fff; letter-spacing: .03em; }
.qp-ach-desc { font-size: .74em; line-height: 1.35; color: var(--qp-dim); margin-top: .1em; }
.qp-ach-prog { display: flex; align-items: center; gap: .6em; margin-top: .4em; }
.qp-ach-prog .qp-bar { height: 4px; }
.qp-ach-count { font-family: var(--qp-mono); font-size: .72em; color: var(--qp-dim); white-space: nowrap; }
.qp-new { font-size: .62em; font-weight: 900; letter-spacing: .18em; text-transform: uppercase; color: #1a1300; background: var(--qp-gold); padding: .3em .6em; border-radius: 99px; box-shadow: 0 0 12px rgba(255, 210, 74, .6); }
.qp-badge {
  position: relative;
  flex: 0 0 auto;
  width: 2.6em; height: 2.6em;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: radial-gradient(circle at 35% 30%, rgba(var(--qp-a-rgb), .55), rgba(var(--qp-b-rgb), .35) 70%, rgba(var(--qp-b-rgb), .2));
  border: 1px solid rgba(var(--qp-a-rgb), .7);
  box-shadow: 0 0 14px rgba(var(--qp-a-rgb), .35), inset 0 0 8px rgba(255, 255, 255, .15);
}
.qp-ach--new .qp-badge { background: radial-gradient(circle at 35% 30%, rgba(255, 230, 140, .8), rgba(255, 170, 40, .45) 70%); border-color: rgba(255, 210, 74, .9); box-shadow: 0 0 16px rgba(255, 210, 74, .5); }
.qp-badge--locked { background: rgba(255, 255, 255, .04); border-color: var(--qp-line-hi); box-shadow: none; color: var(--qp-faint); }
.qp-badge-glyph { font-family: var(--qp-sym); font-size: 1.25em; line-height: 1; font-weight: 700; text-shadow: 0 0 8px rgba(255, 255, 255, .6); }
.qp-badge--locked .qp-badge-glyph { text-shadow: none; opacity: .55; }
.qp-badge .qp-ico { width: 1.3em; height: 1.3em; }
.qp-badge-lock { position: absolute; right: -4px; bottom: -4px; width: 1.3em; height: 1.3em; border-radius: 50%; background: #10142a; border: 1px solid var(--qp-line-hi); display: flex; align-items: center; justify-content: center; color: var(--qp-dim); }
.qp-badge-lock .qp-ico { width: .85em; height: .85em; stroke-width: 2.2; }

/* ------------------------------------------------------------------ *
 * Stats
 * ------------------------------------------------------------------ */
.qp-modes-table { display: flex; flex-direction: column; gap: 6px; }
.qp-mt-row { display: grid; grid-template-columns: minmax(8em, 1fr) minmax(9em, 1.3fr) minmax(60px, 1fr); align-items: center; gap: 1em; padding: .55em .85em; border-radius: 11px; border: 1px solid var(--qp-line); background: rgba(255, 255, 255, .025); }
.qp-mt-name { font-weight: 800; font-size: .88em; color: rgb(var(--c-rgb)); letter-spacing: .04em; }
.qp-mt-val { font-family: var(--qp-mono); font-size: .82em; color: var(--qp-text); }
.qp-mt-row .qp-bar-fill { background: rgb(var(--c-rgb)); box-shadow: 0 0 8px rgba(var(--c-rgb), .7); }

/* ------------------------------------------------------------------ *
 * About
 * ------------------------------------------------------------------ */
.qp-about { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.4fr); gap: 28px; align-items: center; max-width: 1000px; margin: 0 auto; min-height: 100%; }
.qp-about-text p { margin: 0 0 .8em; color: #d0ddf2; line-height: 1.55; font-size: .92em; }
.qp-feats { margin: 0 0 .8em; padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; }
.qp-feats li { position: relative; padding-left: 1.1em; font-size: .82em; color: var(--qp-text); line-height: 1.45; }
.qp-feats li::before { content: ''; position: absolute; left: 0; top: .5em; width: .45em; height: .45em; border-radius: 50%; background: var(--qp-a); box-shadow: 0 0 6px var(--qp-a); }
.qp-about-actions { margin-top: .4em; }

/* ------------------------------------------------------------------ *
 * Toasts
 * ------------------------------------------------------------------ */
.qp-toasts {
  position: absolute;
  left: 50%;
  bottom: 18px;
  bottom: max(18px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: max-content;
  max-width: 90vw;
  pointer-events: none;
  z-index: 5;
}
/* With a menu open, toasts drop from the top centre (menu buttons live at the bottom). */
.qp-ui.qp-open .qp-toasts { top: 12px; top: max(12px, env(safe-area-inset-top)); bottom: auto; }
.qp-toast {
  padding: .65em 1.15em;
  border-radius: 12px;
  background: rgba(12, 16, 34, .94);
  border: 1px solid rgba(var(--qp-a-rgb), .5);
  box-shadow: 0 0 18px rgba(var(--qp-a-rgb), .22), 0 10px 26px rgba(0, 0, 0, .45);
  color: #fff;
  font-weight: 600;
  font-size: .9em;
  letter-spacing: .03em;
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .2s ease, transform .26s var(--qp-ease);
}
.qp-toast.qp-in { opacity: 1; transform: none; }
.qp-toast.qp-out { opacity: 0; transform: translateY(-6px); }

/* ------------------------------------------------------------------ *
 * Responsive
 * ------------------------------------------------------------------ */
@media (max-height: 420px) {
  .qp-head { min-height: 40px; padding-bottom: .3em; }
  .qp-title { font-size: 1.3em; }
  .qp-sub { font-size: .68em; }
  .qp-mode-art { height: 4.2em; }
  .qp-mode-desc { font-size: .8em; line-height: 1.36; }
  .qp-field { margin-bottom: .7em; }
  .qp-hint { margin-top: .35em; }
  .qp-seg-btn { min-height: 38px; }
  .qp-arena { min-height: 44px; padding: .4em .65em; }
  .qp-btn--start, .qp-btn--wide { min-height: 46px; }
  .qp-foot { padding-top: .45em; }
  .qp-headline { font-size: 2.4em; }
  .qp-sb-score { font-size: 2.6em; }
  .qp-scoreboard { margin: .3em 0 .7em; }
  .qp-tiles--hero .qp-tile-val { font-size: 1.5em; }
  .qp-pause-title { font-size: 1.7em; }
  .qp-tip { margin-top: .6em; }
  .qp-btn--big, .qp-btn--quick { min-height: 50px; }
  .qp-navbtn { min-height: 46px; }
  .qp-pause-card { padding: .8em 1.1em .8em; }
}
@media (max-height: 420px) {
  .qp-preview { display: none; }
  /* Phone landscape: 1 CSS px is physically small, so keep the tiny uppercase labels >= ~9 px. */
  .qp-label, .qp-kicker { font-size: .74em; }
  .qp-tile-label { font-size: .72em; }
  .qp-navbtn { font-size: .74em; }
  .qp-mode-tag { font-size: .7em; }
  .qp-chip { font-size: .66em; }
  .qp-sub { font-size: .72em; }
  .qp-btn-small { font-size: .8em; }
  .qp-tile-note, .qp-ach-desc, .qp-set-hint { font-size: .76em; }
}
@media (max-height: 380px) {
  .qp-tip { display: none; }
}
@media (min-width: 1000px) and (min-height: 560px) {
  .qp-mode-badge { display: block; }
}
@media (min-height: 560px) {
  .qp-mode-art { height: 7.2em; margin-bottom: .5em; }
  .qp-mode-card { padding: 1.1em 1.15em 1.2em; gap: .45em; }
  .qp-logo-svg { max-height: 340px; }
}
@media (max-width: 720px) {
  .qp-modes { gap: 8px; }
  .qp-mode-card { padding: .75em .75em .85em; border-radius: 15px; }
  .qp-mode-desc { font-size: .78em; }
  .qp-chip { font-size: .64em; padding: .28em .5em; letter-spacing: .06em; }
  .qp-tagline { letter-spacing: .3em; font-size: .85em; }
  .qp-tagline::before, .qp-tagline::after { width: 1.8em; }
  .qp-settings { columns: 2 260px; }
  .qp-feats { grid-template-columns: 1fr; }
  .qp-head-progress { width: 140px; }
  .qp-mode-tag { letter-spacing: .14em; }
  .qp-body--split { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 0 14px; }
  .qp-seg-btn .qp-long { display: none; }
  .qp-seg-btn .qp-short { display: inline; }
  .qp-seg--opp .qp-seg-btn { padding: 0 .5em; min-width: 0; }
  .qp-range { width: 108px; }
  .qp-range-box { gap: .45em; }
}
@media (max-width: 560px) {
  .qp-modes { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qp-body--split { display: block; overflow-y: auto; }
  .qp-col { overflow: visible; }
  .qp-results { display: block; overflow-y: auto; }
  .qp-results-side { overflow: visible; margin-top: 1em; }
  .qp-tiles--hero { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qp-tiles--5 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qp-about { grid-template-columns: 1fr; }
  .qp-settings { columns: 1; }
  .qp-mt-row { grid-template-columns: 1fr 1fr; }
  .qp-mt-row .qp-bar { display: none; }
  .qp-summary { display: none; }
}
@media (min-width: 1000px) and (min-height: 560px) {
  .qp-arenas { grid-template-columns: 1fr 1fr; }
  .qp-arena { min-height: 64px; }
}

/* ------------------------------------------------------------------ *
 * No flexbox `gap` (Android WebView < Chrome 84): menus.js feature-detects
 * it and sets .qp-nogap on the root; the same spacing comes from margins.
 * (Grid `gap` is fine from Chrome 66 and needs no fallback.)
 * ------------------------------------------------------------------ */
.qp-nogap .qp-head > * + * { margin-left: .9em; }
.qp-nogap .qp-head-extra > * + * { margin-left: .6em; }
.qp-nogap .qp-foot > * + * { margin-left: .7em; }
.qp-nogap .qp-btn > * + * { margin-left: .55em; }
.qp-nogap .qp-tagline::before { margin-right: 1em; }
.qp-nogap .qp-tagline::after { margin-left: 1em; }
.qp-nogap .qp-mode-tagrow > * + * { margin-left: .5em; }
.qp-nogap .qp-range-box > * + * { margin-left: .6em; }
.qp-nogap .qp-arena > * + * { margin-left: .8em; }
.qp-nogap .qp-preview > * + * { margin-left: 1em; }
.qp-nogap .qp-set-title > * + * { margin-left: .55em; }
.qp-nogap .qp-set-row > * + * { margin-left: 12px; }
.qp-nogap .qp-set-row--stack > * + * { margin-left: 0; margin-top: .45em; }
.qp-nogap .qp-scoreboard > * + * { margin-left: 1em; }
.qp-nogap .qp-results-actions > * + * { margin-left: 10px; }
.qp-nogap .qp-pair > * + * { margin-left: .3em; }
.qp-nogap .qp-head-progress > * + * { margin-left: .7em; }
.qp-nogap .qp-ach-progress > * + * { margin-left: .9em; }
.qp-nogap .qp-ach > * + * { margin-left: .8em; }
.qp-nogap .qp-ach-prog > * + * { margin-left: .6em; }
.qp-nogap .qp-dots > * + * { margin-left: 6px; }
.qp-nogap .qp-title-main > * + * { margin-top: 1.6vh; }
.qp-nogap .qp-navbtn > * + * { margin-top: 4px; }
.qp-nogap .qp-mode-card > * + * { margin-top: .4em; }
.qp-nogap .qp-arena-text > * + * { margin-top: .12em; }
.qp-nogap .qp-modes-table > * + * { margin-top: 6px; }
.qp-nogap .qp-toasts > * + * { margin-top: 6px; }
/* Wrapping rows: half-gap margins all round, cancelled by a negative container margin. */
.qp-nogap .qp-cta { margin-left: -.45em; margin-right: -.45em; }
.qp-nogap .qp-cta > * { margin: .45em; }
.qp-nogap .qp-title-nav { margin-left: -4px; margin-right: -4px; }
.qp-nogap .qp-title-nav > * { margin: 0 4px 6px; }
.qp-nogap .qp-chips { margin-left: -2px; margin-right: -2px; }
.qp-nogap .qp-chips > * { margin: 2px; }
.qp-nogap .qp-seg { margin-left: -3px; margin-right: -3px; }
.qp-nogap .qp-seg > * { margin: 3px; }

/* ------------------------------------------------------------------ *
 * Reduced motion: no transforms or animations, quick fades only
 * ------------------------------------------------------------------ */
.qp-rm .qp-screen, .qp-rm .qp-screen.qp-leaving, .qp-rm .qp-screen.qp-active { transform: none; transition: opacity .12s linear; }
.qp-rm .qp-screen *, .qp-rm .qp-toast { animation: none !important; }
.qp-rm .qp-toast { transform: none !important; transition: opacity .12s linear; }
.qp-rm .qp-btn:active, .qp-rm .qp-seg-btn:active, .qp-rm .qp-arena:active, .qp-rm .qp-mode-card:active, .qp-rm .qp-navbtn:active { transform: none; }
.qp-rm .qp-btn--shine::after { display: none; }
@media (prefers-reduced-motion: reduce) {
  .qp-ui .qp-screen, .qp-ui .qp-screen.qp-leaving, .qp-ui .qp-screen.qp-active { transform: none; transition: opacity .12s linear; }
  .qp-ui .qp-screen *, .qp-ui .qp-toast { animation: none !important; }
  .qp-ui .qp-toast { transform: none !important; transition: opacity .12s linear; }
  .qp-ui .qp-btn:active, .qp-ui .qp-seg-btn:active, .qp-ui .qp-arena:active, .qp-ui .qp-mode-card:active { transform: none; }
  .qp-ui .qp-btn--shine::after { display: none; }
}