/* Gem Maze - play.html stylesheet.
   Shell (header, dialogs, buttons, settings) follows the CoA Apps game foundation
   (Coding\Claude\apps and games\README.md). Settings use Access-a-Reader's
   segmented pills, On/Off switches and slider value bubble. */

:root {
  color-scheme: dark;
  --bg-color: #121212;
  --surface-color: #242424;
  --surface-raised: #303030;
  --text-color: #ffffff;
  --text-secondary: #d1d5db;
  --accent-green: #fbbf24;   /* amber: the gems' colour, this game's primary */
  --accent-pink: #60a5fa;    /* blue: secondary */
  --border-light: #aaaaaa;
  --focus-color: #fdfd96;
  --on-accent: #000000;
  --ui-scale: 1.25;
  --world: #0b0a12;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg-color: #f5f5f5;
  --surface-color: #dddddd;
  --surface-raised: #ececec;
  --text-color: #000000;
  --text-secondary: #374151;
  --border-light: #444444;
  --focus-color: #9f9f03;
  --accent-green: #92400e;
  --accent-pink: #1d4ed8;
  --on-accent: #ffffff;
}

* { box-sizing: border-box; }
html { font-size: 16px; height: 100%; overflow: hidden; }
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  font-size: calc(1rem * var(--ui-scale));
}
.site-header, .site-footer { flex-shrink: 0; }
[hidden] { display: none !important; }
a { color: var(--focus-color); text-decoration: underline; }
a:hover, a:focus-visible { color: var(--focus-color); text-decoration: underline; }

.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--focus-color); color: #000000;
  padding: 0.75rem 1.25rem; font-weight: bold; z-index: 1000; border-radius: 0 0 8px 0; text-decoration: none;
}
.skip-link:focus { left: 0; }
.skip-link:focus-visible { color: #000000; }
*:focus-visible { outline: 3px solid var(--focus-color); outline-offset: 2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); border: 0; white-space: nowrap;
}

/* --- Header --- */
.site-header {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem;
  padding: 1rem 1.5rem; border-bottom: 2px solid var(--divider-color);
}
.site-title {
  order: 1; background: none; border: none; padding: 0; margin: 0; color: var(--text-color); font-family: inherit;
  font-size: calc(1.5rem * var(--ui-scale)); font-weight: 800; cursor: pointer;
}
.site-title:hover, .site-title:focus-visible { color: var(--accent-green); }
.site-title .accent-pink { color: var(--accent-pink); }
.header-controls { order: 2; display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.header-controls #settings-btn, .header-controls #menu-btn, .header-controls #btn-where { padding: 0.4em 0.9em; font-size: calc(0.875rem * var(--ui-scale)); line-height: 1.2; }
.back-link-bar { padding: 0.6rem 1.5rem 0; }
.back-link-game { display: inline-block; color: var(--accent-green); font-weight: bold; font-size: calc(0.9rem * var(--ui-scale)); text-decoration: none; }
.back-link-game:hover, .back-link-game:focus-visible { text-decoration: underline; }

/* gap + padding, not overflow:hidden, so the last button's focus ring is not clipped */
.theme-toggle-group { display: flex; gap: 4px; border: 2px solid var(--border-light); border-radius: 8px; padding: 3px; }
.theme-toggle-btn {
  background-color: transparent; color: var(--text-color); border: none; border-radius: 6px; padding: 0.4em 0.9em;
  font-size: calc(0.875rem * var(--ui-scale)); font-weight: bold; cursor: pointer; font-family: inherit;
}
.theme-toggle-btn:hover, .theme-toggle-btn:focus-visible { background-color: var(--border-light); color: var(--bg-color); }
.theme-toggle-btn[aria-checked="true"] { background-color: var(--accent-pink); color: var(--on-accent); }

.speech-toggle-btn {
  display: inline-flex; align-items: center; gap: 0.4em; background: transparent; border: 2px solid var(--border-light);
  border-radius: 8px; color: var(--text-color); padding: 0.4em 0.9em; font-size: calc(0.875rem * var(--ui-scale));
  font-weight: bold; cursor: pointer; font-family: inherit;
}
.speech-toggle-btn:hover, .speech-toggle-btn:focus-visible { background-color: var(--border-light); color: var(--bg-color); }
.speech-toggle-btn[aria-pressed="true"] { background-color: var(--accent-green); color: var(--on-accent); border-color: var(--accent-green); }

.header-controls .mobile-only { display: none; }
.settings-section-theme { display: none; }
@media (max-width: 960px) {
  .header-controls > .theme-toggle-group, .header-controls > .speech-toggle-btn, .header-controls .desktop-only { display: none; }
  .header-controls .mobile-only { display: inline-block; }
  .settings-section-theme { display: block; }
  .site-header { padding: 0.6rem 1rem; }
}
.settings-back-link { margin: -0.4rem 0 1.1rem; }

/* --- Buttons --- */
.btn {
  display: inline-block; background-color: transparent; color: var(--text-color); border: 2px solid var(--accent-green);
  padding: 0.6em 1.2em; border-radius: 8px; font-weight: bold; text-decoration: none; font-size: calc(1rem * var(--ui-scale));
  cursor: pointer; font-family: inherit;
}
.btn:hover, .btn:focus-visible { background-color: var(--accent-green); color: var(--on-accent); }
.btn-primary { background-color: var(--accent-green); color: var(--on-accent); }
.btn-primary:hover, .btn-primary:focus-visible { filter: brightness(1.1); }
.btn-secondary { border-color: var(--border-light); }
.btn-secondary:hover, .btn-secondary:focus-visible { background-color: var(--border-light); color: var(--bg-color); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }

/* --- Game layout --- */
main { flex: 1 1 auto; display: flex; flex-direction: column; padding: 0.6rem 1rem 1rem; gap: 0.6rem; min-height: 0; touch-action: none; }
@media (min-width: 961px) { main { padding-bottom: 2rem; } }
.status-bar {
  display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; flex-shrink: 0;
  font-weight: bold; font-variant-numeric: tabular-nums; font-size: calc(0.95rem * var(--ui-scale));
}
.status-bar .sep { color: var(--text-secondary); }
#level-badge { color: var(--accent-green); font-size: 1.2em; }
.dots { display: inline-flex; gap: 5px; }
.dot { width: 15px; height: 15px; border-radius: 50%; border: 2px solid var(--border-light); background: transparent; }
.dot.on { background: var(--gem); border-color: var(--text-color); }

.stage { position: relative; flex: 1 1 auto; min-height: 0; border-radius: 12px; overflow: hidden; touch-action: none; outline: none; }
.view { position: absolute; inset: 0; background: var(--world); border: 2px solid var(--divider-color); border-radius: 12px; overflow: hidden; }
.view canvas { display: block; width: 100%; height: 100%; }
.flash { position: absolute; inset: 0; opacity: 0; pointer-events: none; z-index: 2; }
.flash.go { animation: flash 0.5s ease-out; }
@keyframes flash { from { opacity: 0.6; } to { opacity: 0; } }
:root.fx-off .flash.go { animation: none; }
.view-msg {
  position: absolute; inset: 0; z-index: 3; display: flex; align-items: center; justify-content: center;
  text-align: center; color: #eef0f4; padding: 24px; margin: 0;
}
.novisuals {
  position: absolute; inset: 0; border-radius: 12px; border: 2px dashed var(--border-light);
  display: flex; align-items: center; justify-content: center; text-align: center; padding: 1.5rem;
  font-size: calc(1.1rem * var(--ui-scale)); color: var(--text-secondary);
}
/* The tutorial's instruction, floating at the top of the picture: dark in dark mode, light in light mode */
.tut-status {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%); z-index: 5; pointer-events: none;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  max-width: calc(100% - 24px); padding: 0.6rem 1rem; border-radius: 10px; text-align: center;
  background: var(--surface-color); color: var(--text-color); border: 2px solid var(--border-light);
  font-size: calc(1.15rem * var(--ui-scale)); font-weight: 700; line-height: 1.35; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}
/* gem slots on the picture: faint outlines that fill with each gem as it is found.
   Clear = a centred tray along the bottom; Out of the way = small, tucked in the bottom-right corner. */
.gem-slots {
  position: absolute; left: 12px; right: 12px; bottom: 10px; z-index: 5; pointer-events: none;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;
}
.gem-slot { width: 42px; height: 42px; overflow: visible; }
.gem-slots.corner { justify-content: flex-end; gap: 6px; bottom: 8px; }
.gem-slots.corner .gem-slot { width: 27px; height: 27px; }
.gem-slot .slot-outline { fill: rgba(0, 0, 0, 0.45); stroke: rgba(255, 255, 255, 0.85); stroke-width: 3.5; stroke-dasharray: 6 5; }
.gem-slots.corner .slot-outline { fill: rgba(0, 0, 0, 0.25); stroke: rgba(255, 255, 255, 0.5); stroke-width: 3; }
.gem-slot.found .slot-outline { display: none; }
.gem-slot.found { filter: drop-shadow(0 0 4px var(--gem)) drop-shadow(0 0 10px var(--gem)); }
.gem-body { fill: var(--gem); }
.gem-table { fill: #fff; fill-opacity: 0.45; }
.gem-facet-l { fill: #000; fill-opacity: 0.18; }
.gem-facet-r { fill: #000; fill-opacity: 0.32; }
.gem-side-l { fill: #fff; fill-opacity: 0.2; }
.gem-side-r { fill: #000; fill-opacity: 0.12; }
.gem-edge { fill: none; stroke: #fff; stroke-opacity: 0.5; stroke-width: 1.5; }
@media (max-width: 960px) {
  .gem-slot { width: 35px; height: 35px; } .gem-slots { gap: 8px; }
  .gem-slots.corner .gem-slot { width: 24px; height: 24px; } .gem-slots.corner { gap: 5px; }
}
/* the countdown, top of the picture, when a level is timed */
.time-overlay {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%); z-index: 5; pointer-events: none;
  padding: 0.25rem 0.9rem; border-radius: 10px; background: var(--surface-color); color: var(--text-color); border: 2px solid var(--border-light);
  font-size: calc(1.4rem * var(--ui-scale)); font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.3; box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}
.time-overlay.urgent { color: var(--accent-green); border-color: var(--accent-green); }
/* phones: the message spans the picture, 10px in from each side */
@media (max-width: 960px) {
  .tut-status { left: 10px; right: 10px; transform: none; max-width: none; padding: 0.6rem 0.75rem; }
}
.tut-btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; pointer-events: none; }
.tut-btn { pointer-events: auto; font-size: calc(0.9rem * var(--ui-scale)); padding: 0.4em 1em; }
.check-row { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; margin: 0.25rem 0 1rem; cursor: pointer; }
.check-row input { width: 22px; height: 22px; margin: 0; accent-color: var(--accent-green); }
.board-tabs { margin: 0.5rem auto 0.75rem; max-width: 22rem; }
.win-table { width: auto; min-width: 11rem; border-collapse: collapse; margin: 0.25rem auto 1rem; font-weight: 700; font-size: calc(1.05rem * var(--ui-scale)); }
.win-table th, .win-table td { padding: 0.5em 0.6em; border-bottom: 1px solid var(--border-light); }
.win-table td { padding-left: 2em; }
.win-table th { text-align: left; }
.win-table td { text-align: right; font-variant-numeric: tabular-nums; }
.win-table tr:last-child th, .win-table tr:last-child td { border-bottom: 0; }
/* Invisible tap zones: top = forward, left/right = turn, bottom = back, middle = where am I.
   Real buttons, so screen readers on phones can find them by touch; drawn only when keyboard-focused. */
.touch-zones {
  position: absolute; inset: 0; z-index: 4; display: grid;
  grid-template-columns: 1fr 1.4fr 1fr; grid-template-rows: 1fr 1.4fr 1fr;
}
.zone {
  background: transparent; border: 0; padding: 0; margin: 0; cursor: pointer; border-radius: 12px;
  -webkit-tap-highlight-color: transparent; touch-action: none; user-select: none; -webkit-user-select: none;
}
.zone:focus { outline: none; }
.zone-fwd { grid-column: 2; grid-row: 1; }
.zone-left { grid-column: 1; grid-row: 2; }
.zone-where { grid-column: 2; grid-row: 2; }
.zone-right { grid-column: 3; grid-row: 2; }
.zone-back { grid-column: 2; grid-row: 3; }

/* --- Dialogs --- */
.modal-backdrop { position: fixed; inset: 0; background-color: rgba(0, 0, 0, 0.6); z-index: 40; }
.settings-dialog, .message-dialog {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background-color: var(--surface-color);
  color: var(--text-color); border: 2px solid var(--divider-color); border-radius: 12px; padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4); max-height: 90vh; overflow-y: auto; width: min(28rem, 92vw);
}
.settings-dialog { z-index: 50; width: min(36rem, 94vw); text-align: left; }
.message-dialog { z-index: 55; text-align: center; }
.settings-dialog-header {
  display: flex; align-items: center; justify-content: space-between; border-bottom: 2px solid var(--divider-color);
  padding-bottom: 0.8rem; margin-bottom: 1.1rem;
}
.settings-dialog-header h2 { margin: 0; font-size: calc(1.5rem * var(--ui-scale)); }
.icon-btn {
  background: transparent; border: 2px solid var(--border-light); color: var(--text-color); border-radius: 50%;
  width: 2.4em; height: 2.4em; font-size: calc(1.2rem * var(--ui-scale)); line-height: 1; cursor: pointer; flex-shrink: 0;
}
.icon-btn:hover, .icon-btn:focus-visible { background-color: var(--border-light); color: var(--bg-color); }

.settings-section { margin-bottom: 1.5rem; padding-bottom: 1.5rem; border-bottom: 2px solid var(--divider-color); }
.settings-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.settings-section h3 { font-size: calc(1.1rem * var(--ui-scale)); color: var(--accent-pink); margin: 0 0 0.9rem; }
.settings-section summary {
  cursor: pointer; font-size: calc(1.1rem * var(--ui-scale)); font-weight: bold; color: var(--accent-pink);
  margin: 0 0 0.9rem; list-style: none; display: flex; align-items: center; gap: 0.5em;
}
.settings-section summary::-webkit-details-marker { display: none; }
.settings-section summary::before { content: "+"; display: inline-block; color: var(--accent-green); font-weight: 800; transform: scale(1.3); }
.settings-section[open] summary::before { content: "\2212"; }

/* room between one setting and the next: pills and switches never sit against the label below them */
.field { margin-bottom: 1.6rem; }
.field:last-child { margin-bottom: 0; }
.field > label, .field .field-label { display: block; font-weight: bold; font-size: calc(0.95rem * var(--ui-scale)); margin-bottom: 0.5rem; }
.field-hint { font-size: calc(0.82rem * var(--ui-scale)); color: var(--text-secondary); margin: 0.15rem 0 0.5rem; }
.field select {
  width: 100%; padding: 0.55em; font-size: calc(0.95rem * var(--ui-scale)); border: 2px solid var(--border-light);
  border-radius: 8px; background-color: var(--bg-color); color: var(--text-color); font-family: inherit;
}

/* Segmented pills (Access-a-Reader): one accent per group */
.segmented { display: flex; flex-wrap: wrap; border: 2px solid var(--border-light); border-radius: 999px; }
.segmented button {
  flex: 1 1 auto; background: transparent; border: 0; padding: 6px 12px; min-height: 40px; font-size: calc(0.9rem * var(--ui-scale));
  font-weight: 700; cursor: pointer; border-right: 1px solid var(--border-light); color: var(--text-color); font-family: inherit;
}
.segmented button:first-child { border-radius: 999px 0 0 999px; }
.segmented button:last-child { border-right: 0; border-radius: 0 999px 999px 0; }
.segmented button[aria-checked="true"] { background: var(--seg-accent, var(--accent-green)); color: #ffffff; }
.segmented button:focus-visible { outline-offset: -3px; }
.segmented.four { display: grid; grid-template-columns: 1fr 1fr; border-radius: 12px; overflow: hidden; }
.segmented.four button { border-radius: 0; border-bottom: 1px solid var(--border-light); }
.segmented.four button:nth-child(2n) { border-right: 0; }
.segmented.four button:nth-last-child(-n+2) { border-bottom: 0; }
.segmented.two { display: grid; grid-template-columns: 1fr 1fr; border-radius: 12px; overflow: hidden; }
.segmented.two button { border-radius: 0; white-space: normal; line-height: 1.2; padding: 8px 10px; }
.segmented.two button:last-child { border-right: 0; }
.segmented.ten { display: grid; grid-template-columns: repeat(5, 1fr); border-radius: 12px; overflow: hidden; }
.segmented.ten button { border-radius: 0; border-bottom: 1px solid var(--border-light); padding: 6px 4px; }
.segmented.ten button:nth-child(5n) { border-right: 0; }
.segmented.ten button:nth-last-child(-n+5) { border-bottom: 0; }
.segmented button.locked { opacity: 0.45; cursor: not-allowed; }
.board-list { text-align: left; margin: 0 0 1rem; padding-left: 1.6em; font-size: calc(0.95rem * var(--ui-scale)); }
.board-list li { margin: 0.3rem 0; }
.board-list li.me { color: var(--accent-green); font-weight: 700; }
.message-dialog.board { width: min(32rem, 92vw); }
.message-dialog.welcome { width: min(44rem, 94vw); padding: 1.25rem 1.5rem; }
.message-dialog.welcome p, .message-dialog.welcome li { font-size: calc(0.95rem * var(--ui-scale)); }
.message-dialog.welcome .welcome-field .field-hint, .message-dialog.welcome .welcome-switch .field-hint { font-size: calc(0.8rem * var(--ui-scale)); }
.message-dialog.welcome ul { margin-bottom: 0.9rem; }
.field input[type="text"] {
  flex: 1 1 auto; min-width: 0; padding: 0.55em; font-size: calc(0.95rem * var(--ui-scale)); border: 2px solid var(--border-light);
  border-radius: 8px; background-color: var(--bg-color); color: var(--text-color); font-family: inherit;
}
.settings-dialog .coa-auth-account-section { margin: 0.5rem 0 0.75rem; padding-bottom: 0; border-bottom: 0; }

/* On/Off switch (Access-a-Reader) */
.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.switch-row label { margin-bottom: 0; font-weight: bold; font-size: calc(0.95rem * var(--ui-scale)); }
.switch-row .field-hint { margin-top: 0.1rem; }
.switch-btn {
  flex-shrink: 0; min-width: 4.4em; min-height: 40px; border-radius: 999px; border: 2px solid var(--border-light);
  background: var(--surface-raised); color: var(--text-color); font-weight: 800; cursor: pointer; padding: 0 14px; font-family: inherit;
  font-size: calc(0.9rem * var(--ui-scale));
}
.switch-btn[aria-checked="true"] { background: var(--accent-green); color: var(--on-accent); border-color: var(--accent-green); }

/* Slider with a value bubble above the handle while it is dragged (Access-a-Reader) */
.range-row { display: flex; align-items: center; gap: 10px; position: relative; }
.range-row input[type="range"] { flex: 1 1 auto; accent-color: var(--accent-green); min-height: 32px; margin: 0; min-width: 0; }
.range-row output { min-width: 3.2em; font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.range-tip {
  position: absolute; bottom: calc(100% + 6px); transform: translateX(-50%); z-index: 2; pointer-events: none;
  background-color: var(--surface-raised); color: var(--text-color); border: 2px solid var(--border-light); border-radius: 6px;
  padding: 3px 8px; font-size: 13px; font-weight: 700; white-space: nowrap;
}
.range-tip::after { content: ""; position: absolute; left: 50%; top: 100%; transform: translateX(-50%); border: 6px solid transparent; border-top-color: var(--border-light); }

.keys-body { text-align: left; margin-bottom: 1rem; }
.keys-body .field-hint { margin-top: 0.9rem; }
.keys { margin: 0; padding-left: 0; list-style: none; display: grid; grid-template-columns: auto 1fr; gap: 0.35rem 0.9rem; font-size: calc(0.9rem * var(--ui-scale)); }
kbd { font-family: inherit; font-weight: 700; border: 1px solid var(--border-light); border-radius: 6px; padding: 0.05em 0.5em; background: var(--surface-raised); }

/* --- Message dialog --- */
.message-dialog h2 { margin-top: 0; font-size: calc(1.5rem * var(--ui-scale)); color: var(--accent-green); }
.message-dialog p { font-size: calc(1.05rem * var(--ui-scale)); margin: 0 0 1rem; text-align: left; }
.message-dialog ul { text-align: left; margin: 0 0 1.2rem; padding-left: 1.2em; }
.message-dialog li { margin: 0.25rem 0; }
.message-dialog .btn-row { justify-content: center; }
.message-dialog .welcome-switch { text-align: left; margin: 0 0 0.9rem; }
.message-dialog .welcome-field { text-align: left; margin: 0 0 0.9rem; }
.message-dialog .welcome-switch label { font-size: calc(1rem * var(--ui-scale)); }
.message-dialog > .field-hint { text-align: left; margin: 0 0 1rem; }

.settings-section.about p { margin: 0.35rem 0; font-size: calc(0.85rem * var(--ui-scale)); }