/* Coulomb and the Atom — dark apparatus stage (COLOR-3 exception pending
   ledger confirmation) with the shared Tuva Sims chrome: Roboto, P1-purple
   info dialog, teal accent, gold focus glow. Control panel styling follows
   astrodrop's card-option language. */

:root {
  --accent:       #004445;
  --accent-light: #006668;
  --focus-glow:   #FFD166;
  /* dialog chrome (shared boilerplate palette) */
  --dialog-bg:     #ffffff;
  --dialog-text:   #2C3E3E;
  --dialog-border: #E5EAE9;
  --dialog-tabs-bg: #F8FBFB;
  --tab-text:      #5A6E6E;
  --p1-purple:     #682D8A;
  /* dark-stage panel palette (sim-specific) */
  --panel-bg:     #10151d;
  --panel-card:   #161d27;
  --panel-border: #2a3542;
  --panel-text:   #dce6f5;
  --panel-muted:  #8ba0bd;
  --sel-glow:     #2dd4bf;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  background: #050a14;
  font-family: Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

#sim-app {
  display: flex;
  flex-direction: row;
  height: 100%;
}

#stage-panel {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

#sim-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: default;
  touch-action: none;
  -ms-touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ── Control panel (vertical, right side; astrodrop card language) ── */
#control-panel {
  flex: 0 0 248px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  background: var(--panel-bg);
  border-left: 1px solid var(--panel-border);
  color: var(--panel-text);
  overflow-y: auto;
}

.space-tabs {
  display: flex;
  gap: 8px;
}

.space-tab {
  flex: 1;
  background: var(--panel-card);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  color: var(--panel-text);
  font: 600 14px Roboto, Arial, sans-serif;
  padding: 10px 4px;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.space-tab.active {
  border-color: var(--sel-glow);
  box-shadow: 0 0 0 1px var(--sel-glow), 0 0 12px rgba(45, 212, 191, 0.35);
  color: #ffffff;
}

.space-tab:focus-visible,
#fire-btn:focus-visible,
#mev-info-btn:focus-visible,
#aim-slider:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}

.panel-group {
  border: none;
  padding: 0;
  margin: 0;
}

.panel-group legend {
  font: 700 12px Roboto, Arial, sans-serif;
  color: var(--panel-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  padding: 0;
}

.radio-row,
.check-row {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  background: var(--panel-card);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 9px 12px;
  margin-bottom: 6px;
  font: 500 14px Roboto, Arial, sans-serif;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.radio-row input,
.check-row input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-row:has(input:checked),
.check-row:has(input:checked) {
  border-color: var(--sel-glow);
  box-shadow: 0 0 0 1px var(--sel-glow), 0 0 10px rgba(45, 212, 191, 0.3);
}

.radio-row:has(input:focus-visible),
.check-row:has(input:focus-visible) {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}

.radio-row em,
.check-row em {
  font-style: normal;
  font-size: 12px;
  color: var(--panel-muted);
  margin-left: auto;
  text-align: right;
}

.check-row.disabled {
  opacity: 0.45;
  cursor: default;
}

#mev-info-btn {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(150, 190, 240, 0.6);
  background: transparent;
  color: #9fc6ee;
  font: 700 12px Roboto, Arial, sans-serif;
  cursor: pointer;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1;
}

#mev-tip {
  margin: 2px 0 8px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--panel-card);
  border: 1px solid var(--panel-border);
  font: 400 12px/1.55 Roboto, Arial, sans-serif;
  color: var(--panel-text);
}

.aim-labels {
  display: flex;
  justify-content: space-between;
  font: 500 12px Roboto, Arial, sans-serif;
  color: var(--panel-muted);
  margin-bottom: 2px;
}

#aim-slider {
  width: 100%;
  accent-color: var(--sel-glow);
  cursor: pointer;
}

#aim-ticks {
  position: relative;
  height: 16px;
  margin-top: 2px;
}

#aim-ticks span {
  position: absolute;
  transform: translateX(-50%);
  font: 500 12px Roboto, Arial, sans-serif;
  color: var(--panel-muted);
  white-space: nowrap;
}

#aim-readout {
  font: 400 14px Roboto, Arial, sans-serif;
  color: var(--panel-text);
  margin: 6px 0 2px;
}

#aim-readout .aim-metres {
  display: block;
  font-size: 12px;
  color: var(--panel-muted);
}

#fire-btn {
  width: 100%;
  margin-top: 10px;
  padding: 12px 0;
  border: none;
  border-radius: 10px;
  background: linear-gradient(180deg, #0ea371 0%, #0a7d57 100%);
  color: #ffffff;
  font: 700 16px Roboto, Arial, sans-serif;
  letter-spacing: 0.04em;
  cursor: pointer;
}

#fire-btn:hover:not(:disabled) { filter: brightness(1.12); }
#fire-btn:disabled { opacity: 0.45; cursor: default; }

.bench-note {
  font: 400 12px/1.55 Roboto, Arial, sans-serif;
  color: var(--panel-muted);
  padding: 0 2px;
  margin-top: 8px;
}

#status-box {
  margin-top: auto;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--panel-card);
  border: 1px solid var(--panel-border);
  font: 400 14px/1.55 Roboto, Arial, sans-serif;
  color: var(--panel-text);
  min-height: 60px;
}

#status-box .tally { font-size: 12px; }
#status-box i { font-style: normal; }

/* Narrow / portrait: panel drops below the stage */
@media (max-width: 640px), (orientation: portrait) and (max-width: 820px) {
  #sim-app { flex-direction: column; }
  #control-panel {
    flex: 0 0 auto;
    max-height: 46%;
    border-left: none;
    border-top: 1px solid var(--panel-border);
  }
  #status-box { margin-top: 6px; }
}

/* ── Accessibility ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Intro slides (house pattern; sim palette) ── */
#intro-dialog {
  background: var(--panel-bg);
  border: 2px solid rgba(120, 200, 255, 0.55);
  border-radius: 12px;
  padding: 28px 30px 22px;
  width: min(500px, calc(100vw - 32px));
  color: var(--panel-text);
  margin: auto;
}

#intro-dialog::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
}

#intro-img {
  display: block;
  max-width: 100%;
  height: 220px;
  object-fit: contain;
  margin: 0 auto 18px;
  border-radius: 8px;
}

#intro-text {
  font-size: 16px;
  line-height: 1.7;
  min-height: 108px;
  margin-bottom: 20px;
}

.intro-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

#intro-skip {
  background: transparent;
  border: none;
  color: var(--panel-muted);
  font: 500 14px Roboto, Arial, sans-serif;
  cursor: pointer;
  padding: 8px 4px;
  text-decoration: underline;
}

#intro-skip:hover { color: var(--panel-text); }

#intro-skip:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}

#intro-count {
  margin-left: auto;
  font: 500 12px Roboto, Arial, sans-serif;
  color: var(--panel-muted);
}

/* ── Confirm dialogs (reset keep/remove + data-mode switch) ── */
#reset-dialog,
#mode-dialog {
  background: var(--panel-bg);
  border: 2px solid rgba(120, 200, 255, 0.55);
  border-radius: 12px;
  padding: 24px 26px;
  width: min(420px, calc(100vw - 32px));
  color: var(--panel-text);
  margin: auto;
}

#reset-dialog::backdrop,
#mode-dialog::backdrop {
  background: rgba(0, 0, 0, 0.65);
}

#reset-dialog h2,
#mode-dialog h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

#reset-dialog p,
#mode-dialog p {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--panel-muted);
  line-height: 1.6;
}

.confirm-dialog-controls {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.confirm-btn {
  background: var(--accent-light);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 8px 18px;
  font-family: Roboto, Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.confirm-btn:hover {
  filter: brightness(1.15);
}

.confirm-btn.secondary {
  background: transparent;
  border: 1px solid rgba(185, 198, 218, 0.5);
  color: var(--panel-muted);
}

.confirm-btn:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}

/* ── Info dialog (shared Tuva Sims chrome — P1 purple, boilerplate block;
      do not theme per sim) ── */
#info-dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 80px);
  overflow: hidden;
  margin: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
  background: var(--dialog-bg);
}

#info-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--p1-purple);
  color: #ffffff;
}

.dialog-header h2 {
  font-size: 16px;
  font-weight: 600;
}

#dialog-close-btn {
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 18px;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

#dialog-close-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

#dialog-close-btn:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}

.dialog-tabs {
  display: flex;
  border-bottom: 2px solid var(--dialog-border);
  background: var(--dialog-tabs-bg);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  padding: 10px 0;
  font-family: Roboto, Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--tab-text);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover {
  color: var(--p1-purple);
}

.tab-btn.active,
.tab-btn[aria-selected="true"] {
  color: var(--p1-purple);
  border-bottom-color: var(--p1-purple);
}

.tab-btn:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: -3px;
}

.dialog-body {
  padding: 16px 20px;
  overflow-y: auto;
  max-height: calc(100vh - 240px);
  color: var(--dialog-text);
  font-size: 14px;
  line-height: 1.55;
}

.dialog-body h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--p1-purple);
  margin-top: 14px;
  margin-bottom: 6px;
}

.dialog-body h3:first-child {
  margin-top: 0;
}

.dialog-body p {
  margin-bottom: 8px;
}

.dialog-body ul,
.dialog-body ol {
  padding-left: 20px;
  margin-bottom: 8px;
}

.dialog-body li {
  margin-bottom: 4px;
}

.dialog-body .standard-tag { display:inline-block; background:#F3EAF8; color:var(--p1-purple); font-weight:700; font-size:12px; padding:2px 8px; border-radius:4px; margin-right:6px; }
.dialog-body details { margin:8px 0 10px; border:1px solid #E5EAE9; border-radius:6px; padding:6px 12px; }
.dialog-body summary { cursor:pointer; font-weight:600; color:var(--p1-purple); }
.dialog-body details[open] summary { margin-bottom:6px; }

.dialog-footer {
  display: flex;
  justify-content: flex-end;
  padding: 12px 20px;
  border-top: 1px solid var(--dialog-border);
  background: var(--dialog-tabs-bg);
}

.dialog-close-footer {
  background: var(--p1-purple);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  font-family: Roboto, Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.dialog-close-footer:hover {
  filter: brightness(1.1);
}

.dialog-close-footer:focus-visible {
  outline: 3px solid var(--focus-glow);
  outline-offset: 2px;
}