:root {
  --bg0: #070a0f;
  --bg1: #0b1020;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.10);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --touchbar-h: 0px; /* overridden on touch */
  --topbar-h: 120px; /* overridden by JS measurement */
  /* touch control sizing (overridden on small screens) */
  --touch-unit: 56px;
  --ab-a: 72px;
  --ab-b: 64px;
}

*,
*::before,
*::after {
  -webkit-user-select: none !important;
  user-select: none !important;
  -webkit-touch-callout: none !important;
}
* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(1200px 700px at 50% -20%, rgba(99, 102, 241, 0.24), transparent 60%),
  radial-gradient(900px 600px at 10% 110%, rgba(34, 211, 238, 0.10), transparent 55%),
  linear-gradient(180deg, var(--bg1), var(--bg0));
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  overflow: hidden;
  overflow-x: hidden; /* guard against accidental horizontal overflow */
  touch-action: manipulation;
}

.app {
  height: 100vh; /* fallback */
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.topbar {
  padding: 14px calc(14px + env(safe-area-inset-right)) 10px calc(14px + env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: nowrap; /* keep actions from dropping due to long subtitle */
  min-width: 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1 1 auto; /* allow brand to shrink; subtitle/title will ellipsis */
}

.brand .title {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand .subtitle {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  flex-wrap: nowrap; /* keep buttons together */
  justify-content: flex-end;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.06));
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: 0.15px;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
  transition: transform 0.05s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.btn.primary {
  border-color: rgba(99, 102, 241, 0.55);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.40), rgba(99, 102, 241, 0.18));
}

.btn.disabled {
  opacity: 0.6;
  cursor: default;
  pointer-events: none;
}

#romInput {
  display: none;
}

.stage {
  padding: 0 calc(14px + env(safe-area-inset-right)) calc(14px + var(--touchbar-h)) calc(14px + env(safe-area-inset-left));
  min-height: 0;
  display: grid;
  place-items: center;
  width: 100%;
  min-width: 0;
}

.canvas-card {
  /* Fit inside available viewport while preserving the GB/GBC screen ratio (160x144 = 10:9)
     - Avoid squishing when the window is very wide but short.
     - Leave room for the topbar + touch controls.
  */
  aspect-ratio: 10 / 9;
  width: min(
    calc(100vw - 28px - env(safe-area-inset-left) - env(safe-area-inset-right)),
    860px,
    calc((100dvh - var(--topbar-h) - var(--touchbar-h)) * 10 / 9)
  );
  height: auto;
  max-height: calc(100dvh - var(--topbar-h) - var(--touchbar-h));
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 0;
}

canvas {
  width: 100%;
  height: 100%;
  aspect-ratio: 10 / 9;
  border-radius: calc(var(--radius) - 10px);
  image-rendering: pixelated;
  background: #000;
  outline: none;
  border: 1px solid rgba(255, 255, 255, 0.10);
}

/* Fullscreen: the fullscreen element itself fills the viewport, so keep the canvas centered
   and explicitly size it to the largest 10:9 rectangle that fits. */
.canvas-card:fullscreen {
  width: 100vw;
  height: 100vh;
  max-height: none;
  padding: 0;
  border-radius: 0;
  border: none;
  background: #000;
  box-shadow: none;
}

.canvas-card:fullscreen canvas {
  width: min(100vw, calc(100vh * 10 / 9));
  height: auto;
  max-width: 100vw;
  max-height: 100vh;
  border-radius: 0;
  border: none;
}

.hint {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
  max-width: min(
    calc(100vw - 28px - env(safe-area-inset-left) - env(safe-area-inset-right)),
    860px
  );
  line-height: 1.35;
}

.hint code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(0, 0, 0, 0.22);
}

/* Touch controls (phones/tablets) */
#touch-controls {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px calc(14px + env(safe-area-inset-right)) calc(12px + env(safe-area-inset-bottom)) calc(14px + env(safe-area-inset-left));
  display: none;
  gap: 12px;
  align-items: end;
  justify-content: center;
  flex-wrap: wrap;
  pointer-events: none; /* enable only on children */
}

#touch-controls .cluster {
  pointer-events: auto;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 22px;
  padding: 10px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Right-side touch cluster: Start/Select stacked above A/B */
#touch-controls .cluster-right {
  display: grid;
  gap: 12px;
  border: none;
  align-items: center;
  justify-items: center;
}

.dpad {
  display: grid;
  grid-template-columns: var(--touch-unit) var(--touch-unit) var(--touch-unit);
  grid-template-rows: var(--touch-unit) var(--touch-unit) var(--touch-unit);
  gap: clamp(4px, 1.6vw, 8px);
  align-items: center;
  justify-items: center;
}

.dpad .spacer {
  width: var(--touch-unit);
  height: var(--touch-unit);
}

.touch-btn {
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.05));
  color: var(--text);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.25);
  font-weight: 750;
}

.touch-btn:active {
  transform: translateY(1px);
}

.touch-btn.square {
  width: var(--touch-unit);
  height: var(--touch-unit);
  border-radius: 16px;
  font-size: 1.05rem;
}

.touch-btn.pill {
  height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 0.92rem;
  letter-spacing: 0.2px;
}

.touch-btn.round {
  width: var(--ab-a);
  height: var(--ab-a);
  border-radius: 999px;
  font-size: 1.25rem;
}

.touch-btn.round.b {
  width: var(--ab-b);
  height: var(--ab-b);
  font-size: 1.1rem;
  opacity: 0.95;
}

.meta {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;

  /* Start/Select group styling */
  padding: 10px 12px;
  border-radius: 18px;
  /*background: rgba(255, 255, 255, 0.04);*/
  border: 1px solid rgba(255, 255, 255, 0.10);
  /*box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);*/
  box-sizing: border-box;
}

.ab {
  display: flex;
  gap: 12px;
  align-items: end;
  justify-content: center;

  /* A/B group styling */
  padding: 10px 12px;
  border-radius: 18px;
  /*background: rgba(255, 255, 255, 0.04);*/
  border: 1px solid rgba(255, 255, 255, 0.10);
  /*box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);*/
  box-sizing: border-box;
}


.dlg {
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 16px;
  background: rgba(12, 16, 28, .96);
  color: rgba(255, 255, 255, .92);
  padding: 14px;
  /* Keep the dialog fully inside the viewport/safe-area. */
  /* Subtract a tiny extra buffer to avoid 1–2px rounding overflow on some mobile browsers. */
  width: min(
    560px,
    calc(100dvw - 36px - env(safe-area-inset-left) - env(safe-area-inset-right))
  );
  max-width: min(
    560px,
    calc(100dvw - 36px - env(safe-area-inset-left) - env(safe-area-inset-right))
  );
  overflow-x: clip; /* prevent tiny horizontal overflow from inner flex items */
  box-shadow: 0 18px 40px rgba(0, 0, 0, .55);
}

.dlg-form,
.dlg-section,
.dlg-urlrow,
.dlg-actions {
  min-width: 0;
}

.dlg-urlrow > * {
  min-width: 0;
}

.dlg::backdrop {
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.dlg-form {
  display: grid;
  gap: 12px;
  margin: 0;
}

.dlg-title {
  font-weight: 800;
  letter-spacing: .2px;
}

.dlg-sub {
  color: var(--muted);
  font-size: .92rem;
}

.dlg-section {
  display: grid;
  gap: 8px;
}

.dlg-label {
  font-weight: 700;
  font-size: .92rem;
  color: rgba(255, 255, 255, .88);
}

.dlg-help {
  color: var(--muted);
  font-size: .88rem;
  line-height: 1.35;
}

.dlg-help code {
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .10);
  background: rgba(0, 0, 0, .22);
}

.dlg-divider {
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, .55);
  font-size: .85rem;
  padding: 2px 0;
}

.dlg-file,
.dlg-url {
  width: 100%;
  min-width: 0; /* allow grid children to shrink instead of forcing dialog wider */
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .06);
  color: rgba(255, 255, 255, .92);
  outline: none;
}

.dlg-urlrow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.dlg-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 0;
  margin: 0;
}

.rom-list {
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .04);
  border-radius: 14px;
  padding: 8px;
  margin: 0;
  max-height: min(46vh, 360px);
  overflow: auto;
  display: grid;
  gap: 6px;
}

.rom-item {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .10);
  background: rgba(0, 0, 0, .12);
  cursor: pointer;
}

.rom-item:hover {
  border-color: rgba(255, 255, 255, .18);
}

.rom-item input[type="radio"] {
  margin: 0;
}

.rom-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rom-size {
  color: var(--muted);
  font-size: .88rem;
}

.recent-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.recent-chip {
  border: 1px solid rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .06);
  color: rgba(255, 255, 255, .88);
  border-radius: 999px;
  padding: 8px 10px;
  font-size: .86rem;
  cursor: pointer;
  max-width: 100%;
  min-width: 0;
  flex: 1 1 220px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.recent-chip:hover {
  border-color: rgba(255, 255, 255, .20);
}

.recent-chip .txt {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: min(44ch, 100%);
}

/* The Recent header row uses flex in HTML; allow wrapping on very narrow screens. */
#recentWrap .dlg-label {
  flex-wrap: wrap;
  min-width: 0;
}

.recent-chip .hint {
  color: rgba(255, 255, 255, .55);
  font-size: .82rem;
}

/* Touch UI: enabled by JS adding class "touch-ui" on <html> */
:root.touch-ui {
  /* JS will overwrite --touchbar-h with measured height; keep a fallback */
  --touchbar-h: 170px;
  --touch-unit: 56px;
  --ab-a: 72px;
  --ab-b: 64px;
}

.touch-ui #touch-controls {
  display: grid;
  grid-template-columns: auto auto;
  justify-content: space-between;
  align-items: end;
}

.touch-ui .hint.desktop-only {
  display: none;
}

/* ---- Settings dialog ---- */
.settings-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.slider { width: 100%; }

.slider-val {
  min-width: 3.5ch;
  text-align: right;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.keybind-list {
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .04);
  border-radius: 14px;
  padding: 6px;
  display: grid;
  gap: 6px;
}

.keybind-item {
  display: grid;
  grid-template-columns: 90px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .10);
  background: rgba(0, 0, 0, .12);
}

.keybind-item .act {
  color: rgba(255, 255, 255, .88);
  font-weight: 750;
  font-size: .92rem;
}

.keybind-item .key {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: var(--muted);
  font-size: .92rem;
}

.keybind-item .bind {
  padding: 8px 10px;
  border-radius: 10px;
  font-size: .86rem;
}

.keybind-item.capturing {
  border-color: rgba(99, 102, 241, 0.55);
  box-shadow: 0 10px 26px rgba(0,0,0,.35);
}

/* Phone-ish tweaks (only when touch UI is actually enabled) */
@media (max-width: 900px) {
  :root.touch-ui {
    --touch-unit: clamp(38px, 12vw, 52px);
    --ab-a: clamp(50px, 16vw, 64px);
    --ab-b: clamp(46px, 14vw, 58px);
  }

  .touch-ui #fsButton { display: none; }
  .touch-ui #settingsButton { display: none; }
  .touch-ui .canvas-card { padding: 0; border: none; box-shadow: none; background: #000; }
  .touch-ui canvas { border: none; }

  .touch-ui #touch-controls .cluster { padding: 8px; border-radius: 18px; }
  .touch-ui .touch-btn.pill { height: 38px; padding: 0 12px; font-size: 0.88rem; }
  .touch-ui .touch-btn.square { border-radius: 14px; }
}

/* Prevent mobile browsers from zooming in on the URL input */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
  select,
  textarea,
  input {
    font-size: 16px;
  }
}

/* Narrow phones: keep the ROM loader dialog compact and avoid side-by-side overflow */
@media (max-width: 480px) {
  .dlg {
    width: min(
      560px,
      calc(100dvw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right))
    );
    max-width: min(
      560px,
      calc(100dvw - 24px - env(safe-area-inset-left) - env(safe-area-inset-right))
    );
    padding: 12px;
    border-radius: 14px;
  }

  .dlg-urlrow {
    grid-template-columns: 1fr;
  }

  #loadUrlGo {
    width: 100%;
  }

  .dlg-actions {
    justify-content: stretch;
  }

  .dlg-actions .btn {
    flex: 1;
  }
}