:root {
  color-scheme: dark;
  --ink: #eef6ff;
  --muted: #9fb2c6;
  --deep: #06101d;
  --panel: #0b1a2a;
  --line: #294057;
  --orbit: #56d6c9;
  --orbit-deep: #143e42;
  --peak: #ffbd59;
  --peak-deep: #4c3414;
  --spark: #d58cff;
  --spark-deep: #412252;
  --wave: #76a9ff;
  --wave-deep: #17345c;
  --success: #8ce99a;
  --warning: #ffcf70;
  --focus: #ffffff;
  --shadow: 0 28px 80px rgb(0 0 0 / 0.34);
  --number-font: "Cascadia Mono", Consolas, "Lucida Console", monospace;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { overflow-x: clip; background: var(--deep); }

body {
  overflow-x: clip;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgb(86 214 201 / 0.13), transparent 27rem),
    radial-gradient(circle at 88% 75%, rgb(118 169 255 / 0.11), transparent 32rem),
    var(--deep);
}

button { color: inherit; font: inherit; }

button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 30;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--deep);
  background: var(--ink);
  border-radius: 0.5rem;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.app-shell {
  width: min(1240px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 2rem;
}

.topbar,
.brand-lockup,
.topbar-actions,
.game-heading,
.status-strip,
.prototype-note,
.run-card {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  min-height: 3.5rem;
  margin-bottom: 1rem;
}

.brand-lockup,
.topbar-actions { gap: 0.75rem; }

.brand-mark {
  display: inline-flex;
  gap: 0.14rem;
  align-items: center;
  padding: 0.45rem 0.55rem;
  font-size: 0.76rem;
  background: #102338;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
}

.brand-mark span:nth-child(1) { color: var(--orbit); }
.brand-mark span:nth-child(2) { color: var(--peak); }
.brand-mark span:nth-child(3) { color: var(--spark); }

.brand-name { font-size: 1.12rem; font-weight: 850; letter-spacing: 0.01em; }

.edition-label {
  padding-left: 0.75rem;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  border-left: 1px solid var(--line);
}

.star-total {
  padding: 0.5rem 0.72rem;
  color: var(--warning);
  font-size: 0.95rem;
  font-weight: 800;
  background: rgb(255 207 112 / 0.08);
  border: 1px solid rgb(255 207 112 / 0.22);
  border-radius: 999px;
}

.text-button,
.rules-close {
  padding: 0.6rem 0.8rem;
  border: 0;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.text-button:hover,
.rules-close:hover { color: var(--ink); }

.game-layout {
  display: block;
}

.play-column,
.rules-panel {
  background: rgb(11 26 42 / 0.9);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.play-column {
  min-width: 0;
  padding: clamp(1rem, 2.5vw, 1.8rem);
  border-radius: 1.35rem;
}

.game-heading {
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.title-copy { min-width: 0; }

.eyebrow,
.completion-kicker {
  margin: 0 0 0.32rem;
  color: var(--orbit);
  font-size: 0.88rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 0.3rem;
  font-size: clamp(1.7rem, 3.5vw, 2.65rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h2 { font-size: 1.35rem; line-height: 1.18; letter-spacing: -0.025em; }

.level-description {
  max-width: 38rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.45;
}

.level-description,
.test-mode-badge,
.status-message,
.junction-copy p,
.prototype-note span {
  overflow-wrap: anywhere;
}

.test-level-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.85rem;
  padding: 0.55rem 0.65rem;
  color: var(--muted);
  font-size: 0.76rem;
  background: rgb(255 207 112 / 0.055);
  border: 1px dashed rgb(255 207 112 / 0.38);
  border-radius: 0.72rem;
}

.test-chip,
.test-mode-badge {
  color: var(--warning);
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.test-level-picker input {
  width: 5.5rem;
  min-height: 2.25rem;
  padding: 0.3rem 0.5rem;
  color: var(--ink);
  font: inherit;
  background: #071521;
  border: 1px solid #4d6174;
  border-radius: 0.48rem;
}

.test-level-picker button {
  min-height: 2.25rem;
  padding: 0.35rem 0.7rem;
  color: var(--deep);
  font-weight: 850;
  background: var(--warning);
  border: 0;
  border-radius: 0.48rem;
  cursor: pointer;
}

.test-mode-badge { margin-left: auto; font-size: 0.8rem; }

.journey-strip {
  margin-bottom: 0.85rem;
  padding: 0.72rem 0.85rem;
  background: linear-gradient(90deg, rgb(86 214 201 / 0.09), transparent), #071521;
  border: 1px solid #20384e;
  border-radius: 0.8rem;
}

.journey-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.journey-heading strong { color: var(--ink); }

.journey-rail {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.35rem;
  margin: 0.58rem 0 0.5rem;
}

.journey-marker {
  height: 0.38rem;
  background: #284157;
  border-radius: 999px;
}

.journey-marker.is-complete { background: var(--success); }
.journey-marker.is-current { box-shadow: 0 0 0 2px rgb(255 255 255 / 0.34); }

.status-strip {
  flex-wrap: wrap;
  gap: 0.55rem 0.75rem;
  min-height: 3rem;
  padding: 0.65rem 0.85rem;
  color: var(--muted);
  font-size: 1rem;
  background: #071521;
  border: 1px solid #20384e;
  border-radius: 0.8rem;
}

.status-strip strong { color: var(--ink); font-variant-numeric: tabular-nums; }
.status-strip > span:not(.status-message) { white-space: nowrap; }
.status-message { flex: 1 1 22rem; min-width: 0; margin-left: auto; color: var(--ink); font-size: 0.9rem; line-height: 1.4; overflow-wrap: anywhere; text-align: right; white-space: normal; }
.status-message[data-tone="good"] { color: var(--success); }
.status-message[data-tone="caution"] { color: var(--warning); }

.stack-status {
  padding: 0.25rem 0.52rem;
  color: var(--warning);
  font-weight: 850;
  background: rgb(255 207 112 / 0.08);
  border: 1px solid rgb(255 207 112 / 0.28);
  border-radius: 999px;
}

.assist-toggle {
  display: inline-flex;
  gap: 0.42rem;
  align-items: center;
  min-height: 2rem;
  padding: 0.28rem 0.58rem;
  color: var(--ink);
  font-weight: 750;
  background: rgb(140 233 154 / 0.06);
  border: 1px solid rgb(140 233 154 / 0.24);
  border-radius: 999px;
  cursor: pointer;
}

.assist-toggle input {
  width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: var(--success);
}

.board-frame {
  overflow-x: hidden;
  overflow-y: hidden;
  margin: 0.85rem 0;
  padding: clamp(0.65rem, 2vw, 1rem);
  background: linear-gradient(145deg, rgb(255 255 255 / 0.035), transparent 40%), #06131f;
  border: 1px solid #254057;
  border-radius: 1.1rem;
}

.board {
  display: grid;
  width: 100%;
  min-width: 0;
  gap: 0.55rem;
}

.junction-panel {
  display: grid;
  grid-template-columns: minmax(12rem, 1fr) auto;
  gap: 1rem;
  align-items: center;
  margin: 0 0 0.85rem;
  padding: 0.85rem 1rem;
  background: linear-gradient(135deg, rgb(255 207 112 / 0.08), transparent), #071521;
  border: 1px solid rgb(255 207 112 / 0.32);
  border-radius: 0.9rem;
}

.junction-panel[hidden] { display: none; }
.junction-copy h2 { margin: 0.08rem 0 0.25rem; font-size: 1.1rem; }
.junction-copy p:last-child { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.4; }
.junction-rack { display: flex; gap: 0.65rem; }

.junction-slot {
  width: 5.2rem;
  min-height: 4.8rem;
  border: 2px dashed rgb(255 207 112 / 0.52);
  background: rgb(255 207 112 / 0.045);
}

.junction-slot.is-empty {
  display: grid;
  place-items: center;
  color: var(--warning);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.junction-slot.is-selected,
.junction-slot.is-hinted { border-style: solid; border-color: var(--focus); }

.shelf-row {
  display: grid;
  grid-template-columns: repeat(var(--rank-count, 3), minmax(3.6rem, 1fr));
  gap: clamp(0.4rem, 1.25vw, 0.65rem);
  align-items: stretch;
  padding-bottom: 0.62rem;
  border-bottom: 0.28rem solid #294158;
}

.shelf-row:last-child { padding-bottom: 0; border-bottom: 0; }

.shelf-row.is-complete {
  opacity: 0.46;
  transition: opacity 150ms ease;
}

.shelf-row.is-complete:hover,
.shelf-row.is-complete:focus-within { opacity: 0.5; }

.shelf-heading {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.85rem;
  min-width: 0;
  padding: 0.38rem 0.55rem;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: linear-gradient(90deg, rgb(86 214 201 / 0.1), transparent 70%);
  border-left: 0.2rem solid rgb(86 214 201 / 0.58);
  border-radius: 0.38rem;
}

.shelf-heading strong {
  color: var(--ink);
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.shelf-order {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.45rem;
  min-width: 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.shelf-order .order-label {
  margin-right: 0.2rem;
  color: rgb(159 178 198 / 0.72);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.shelf-order .order-rank {
  display: grid;
  place-items: center;
  min-width: 1.9rem;
  height: 1.7rem;
  padding: 0 0.32rem;
  color: var(--ink);
  font-family: var(--number-font);
  font-size: 1.125rem;
  font-weight: 900;
  background: #10283b;
  border: 1px solid #29465f;
  border-radius: 0.32rem;
}

.shelf-order i {
  color: rgb(159 178 198 / 0.6);
  font-size: 0.9rem;
  font-style: normal;
}

.board.is-wide .shelf-row {
  grid-template-columns: repeat(var(--rank-count), minmax(0, 1fr));
  gap: clamp(0.2rem, 0.7vw, 0.5rem);
}

.board.is-mega .shelf-row {
  grid-template-columns: repeat(var(--rank-count), minmax(0, 1fr));
  gap: clamp(0.12rem, 0.45vw, 0.35rem);
}

.board .shelf-row.has-signal-stacks {
  grid-template-columns: repeat(var(--stack-count), minmax(0, 1fr));
  gap: clamp(0.2rem, 0.7vw, 0.55rem);
}

.signal-stack {
  position: relative;
  display: grid;
  grid-template-areas: "stack";
  align-items: start;
  width: 100%;
  min-width: 0;
  padding: 0 0.28rem 0.42rem 0;
  isolation: isolate;
}

.signal-stack .tile {
  grid-area: stack;
  width: calc(100% - clamp(0.25rem, 0.9vw, 0.75rem));
  min-width: 0;
  min-height: 4.2rem;
}

.signal-stack .tile + .tile {
  z-index: 1;
  justify-self: end;
  margin-left: 0;
  transform: translateY(0.42rem);
}

.signal-stack .tile:not(.is-covered-stack-card):not(.is-cleared-stack-card) { z-index: 2; }

.signal-stack .tile.is-covered-stack-card {
  pointer-events: none;
  filter: brightness(0.58) saturate(0.72);
}

.signal-stack .tile.is-cleared-stack-card {
  display: none;
}

.signal-stack.is-lower-active .tile:not(.is-cleared-stack-card) {
  z-index: 2;
  justify-self: end;
  transform: translateY(0.42rem);
}

.signal-stack .tile + .tile:hover { transform: translateY(0.28rem); }
.signal-stack .tile + .tile.is-selected { transform: translateY(0.2rem) scale(1.02); }

.tile {
  position: relative;
  display: grid;
  overflow: hidden;
  grid-template-rows: 1fr auto;
  place-items: center;
  min-width: 0;
  min-height: clamp(4.7rem, 9vw, 6.1rem);
  padding: 0.55rem 0.3rem 0.4rem;
  border: 1px solid transparent;
  border-radius: 0.9rem;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.12), 0 8px 20px rgb(0 0 0 / 0.2);
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 130ms ease, border-color 130ms ease, box-shadow 130ms ease, filter 130ms ease;
}

.tile:hover { transform: translateY(-2px); filter: brightness(1.07); }
.tile.orbit { color: var(--orbit); background: var(--orbit-deep); }
.tile.peak { color: var(--peak); background: var(--peak-deep); }
.tile.spark { color: var(--spark); background: var(--spark-deep); }
.tile.wave { color: var(--wave); background: var(--wave-deep); }
.tile.bolt { color: #ff8f70; background: #54251c; }
.tile.bloom { color: #a9e66e; background: #274319; }
.tile.prism { color: #f6a8c4; background: #52233a; }
.tile.comet { color: #ffd86f; background: #493a12; }
.tile.rune { color: #a9a2ff; background: #302b61; }
.tile.echo { color: #79e0ff; background: #174251; }

.board.is-wide .tile { min-height: 4.2rem; }
.board.is-wide .tile-symbol { font-size: 1.65rem; }
.board.is-wide .tile-meta { font-size: 0.9rem; letter-spacing: 0; }
.board.is-mega .tile {
  min-height: clamp(2.85rem, 5.2vw, 3.75rem);
  padding: 0.35rem 0.08rem 0.3rem;
  border-radius: clamp(0.42rem, 1vw, 0.72rem);
}
.board.is-mega .tile-symbol { font-size: clamp(1rem, 2.1vw, 1.5rem); }
.board.is-mega .tile-meta {
  display: flex;
  justify-content: center;
  gap: 0.16em;
  width: 100%;
  font-size: clamp(0.86rem, 1.12vw, 0.98rem);
  letter-spacing: 0;
  white-space: nowrap;
}
.board.is-mega .tile-family {
  max-width: calc(100% - 1.4em);
  overflow: hidden;
  text-overflow: clip;
}
.board.is-mega .tile-rank { flex: 0 0 auto; }
.tile.is-selected {
  border-color: var(--focus);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.22), 0 0 0 3px rgb(255 255 255 / 0.2);
  transform: translateY(-3px) scale(1.02);
}

.tile.is-hinted {
  border-color: var(--success);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.18), 0 0 0 3px rgb(140 233 154 / 0.24);
}

.tile.is-correct::after {
  position: absolute;
  top: 0.4rem;
  right: 0.45rem;
  width: 0.45rem;
  height: 0.45rem;
  content: "";
  background: var(--success);
  border-radius: 50%;
}

.tile.is-locked {
  border-color: rgb(255 255 255 / 0.26);
  cursor: not-allowed;
  filter: saturate(0.72);
}

.tile.is-locked::before {
  position: absolute;
  top: 0.35rem;
  left: 0.42rem;
  content: "LOCK";
  color: rgb(255 255 255 / 0.7);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.tile.is-relay::before {
  position: absolute;
  top: 0.32rem;
  left: 0.38rem;
  padding: 0.1rem 0.2rem;
  content: "RELAY";
  color: #201704;
  font-size: 0.8rem;
  font-weight: 950;
  letter-spacing: 0.055em;
  background: var(--warning);
  border-radius: 0.22rem;
}

.tile.is-empty-board-slot {
  color: var(--warning);
  background: repeating-linear-gradient(-45deg, #0a1b2a 0 7px, #10283b 7px 14px);
  border: 2px dashed rgb(255 207 112 / 0.6);
  box-shadow: none;
}

.tile.is-empty-board-slot::after {
  content: "OPEN";
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.tile.did-swap { animation: settle 260ms ease-out; }

@keyframes settle {
  0% { transform: scale(0.9); opacity: 0.7; }
  65% { transform: scale(1.04); }
  100% { transform: scale(1); opacity: 1; }
}

.tile-symbol { font-size: clamp(1.7rem, 4.7vw, 2.7rem); line-height: 1; }
.tile-meta { font-family: var(--number-font); font-size: 1rem; font-weight: 900; letter-spacing: 0.015em; text-transform: uppercase; }

.game-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
}

.action-button,
.primary-button,
.completion-button {
  min-height: 3rem;
  padding: 0.62rem 0.7rem;
  border: 1px solid #35516b;
  background: #102337;
  border-radius: 0.7rem;
  cursor: pointer;
}

.action-button:hover:not(:disabled),
.completion-button:hover { background: #17304a; }

.action-button:disabled { color: #647687; cursor: not-allowed; opacity: 0.58; }
.action-button kbd { margin-left: 0.18rem; color: var(--muted); font: 0.68rem/1 ui-monospace, Consolas, monospace; }
.hint-button { border-color: #4b657d; }
.primary-button { color: var(--deep); font-weight: 850; background: var(--orbit); border-color: var(--orbit); }
.primary-button:hover { background: #7ce8dd; }

.completion-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  margin-top: 0.85rem;
  padding: 1rem;
  color: #102417;
  background: var(--success);
  border-radius: 0.9rem;
}

.completion-card[hidden] { display: none; }
.completion-stars { color: #c17b00; font-size: 1.55rem; letter-spacing: 0.05em; }
.completion-copy-wrap h2,
.completion-copy-wrap p { margin-bottom: 0.18rem; }
.completion-kicker { color: #285133; }
.completion-actions { display: flex; gap: 0.5rem; }
.completion-button { color: #173121; background: rgb(255 255 255 / 0.42); border-color: rgb(16 36 23 / 0.22); }
.completion-card .primary-button { color: var(--ink); background: #102417; border-color: #102417; }

.rules-panel {
  position: fixed;
  z-index: 31;
  inset: 0 0 0 auto;
  width: min(29rem, calc(100% - 1rem));
  overflow-y: auto;
  padding: 3.4rem 1.35rem 1.35rem;
  border-radius: 1.15rem 0 0 1.15rem;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(105%);
  transition: transform 180ms ease;
}

.rules-panel.is-open {
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}

.rules-panel[aria-hidden="true"] { display: none; }

.rules-scrim {
  position: fixed;
  z-index: 30;
  inset: 0;
  border: 0;
  background: rgb(2 8 15 / 0.72);
  cursor: pointer;
}

.rules-scrim[hidden] { display: none; }
body.rules-open { overflow: hidden; }

.rules-close {
  display: block;
  position: absolute;
  top: 0.8rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  font-size: 1.35rem;
  line-height: 1;
  background: #071521;
  border: 1px solid #29465f;
  border-radius: 50%;
}

.rules-list {
  display: grid;
  gap: 0.8rem;
  margin: 1rem 0;
  padding: 0;
  list-style: none;
}

.rules-list li {
  display: grid;
  grid-template-columns: 2.15rem 1fr;
  gap: 0.75rem;
  align-items: start;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.5;
}

.rules-list strong { color: var(--ink); }

.rule-number {
  display: grid;
  place-items: center;
  width: 2.15rem;
  height: 2.15rem;
  color: var(--deep);
  font-weight: 900;
  background: var(--orbit);
  border-radius: 50%;
}

.score-guide,
.input-guide,
.run-card {
  margin-top: 0.9rem;
  padding: 0.9rem;
  background: #071521;
  border: 1px solid #20384e;
  border-radius: 0.78rem;
}

.score-guide h3,
.input-guide h3,
.run-card h3 { margin-bottom: 0.55rem; font-size: 1.1rem; }

.score-guide p,
.input-guide p {
  margin-bottom: 0.4rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.5;
}

.score-guide p:not(.score-note) {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  white-space: nowrap;
}

.score-guide p:last-child,
.input-guide p:last-child { margin-bottom: 0; }
.score-guide span { display: inline-block; min-width: 2.65rem; color: var(--warning); letter-spacing: 0.04em; }
.score-guide .score-note { margin-top: 0.7rem; padding-top: 0.65rem; color: var(--ink); border-top: 1px solid #20384e; }
.input-guide strong { color: var(--ink); }

.run-card { justify-content: space-between; gap: 0.75rem; }
.run-card .eyebrow { margin-bottom: 0.2rem; }
.run-card h3 { margin-bottom: 0; }
.run-stat { display: grid; text-align: right; }
.run-stat strong { color: var(--warning); font-size: 1.5rem; line-height: 1; }
.run-stat span { color: var(--muted); font-size: 0.68rem; text-transform: uppercase; }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.legend-symbol.orbit { color: var(--orbit); }
.legend-symbol.peak { color: var(--peak); }
.legend-symbol.spark { color: var(--spark); }
.legend-symbol.wave { color: var(--wave); }
.legend-symbol.bolt { color: #ff8f70; }
.legend-symbol.bloom { color: #a9e66e; }
.legend-symbol.prism { color: #f6a8c4; }
.legend-symbol.comet { color: #ffd86f; }
.legend-symbol.rune { color: #a9a2ff; }
.legend-symbol.echo { color: #79e0ff; }

.prototype-note {
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0.3rem 0;
  color: #74899e;
  font-size: 0.75rem;
  letter-spacing: 0.035em;
}

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

@media (max-width: 1100px) {
  .status-strip { flex-wrap: wrap; }
  .status-message { width: 100%; margin-left: 0; text-align: left; white-space: normal; }
}

@media (max-width: 960px) {
  .game-layout { display: block; }
}

@media (max-width: 700px) {
  .app-shell { width: min(100% - 0.75rem, 44rem); padding-top: 0.45rem; }
  .topbar { margin-bottom: 0.45rem; }
  .edition-label { display: none; }
  .star-total { padding: 0.4rem 0.55rem; font-size: 0.86rem; }
  .play-column { padding: 0.8rem; border-radius: 1rem; }
  .game-heading { display: grid; }
  .test-mode-badge { width: 100%; margin-left: 0; }
  .journey-heading { font-size: 0.8rem; }
  .status-strip { gap: 0.38rem 0.85rem; }
  .status-message { width: 100%; margin-left: 0; }
  .board-frame { padding: 0.5rem; }
  .shelf-row { gap: 0.3rem; }
  .board.is-wide .shelf-row,
  .board.is-mega .shelf-row {
    grid-template-columns: repeat(var(--rank-count), minmax(0, 1fr));
  }
  .board .shelf-row.has-signal-stacks {
    grid-template-columns: repeat(var(--stack-count), minmax(0, 1fr));
  }
  .shelf-row { grid-template-columns: repeat(var(--rank-count, 3), minmax(0, 1fr)); }
  .shelf-heading { padding: 0.3rem 0.42rem; }
  .shelf-heading { flex-wrap: wrap; }
  .tile { min-height: 4.55rem; padding-inline: 0.12rem; border-radius: 0.68rem; }
  .tile-meta { font-size: 0.88rem; letter-spacing: 0; }
  .tile.is-locked::before,
  .tile.is-relay::before { font-size: 0.68rem; }
  .tile.is-locked::before { content: "L"; }
  .tile.is-relay::before { content: "R"; }
  .board.is-mega .tile-family { display: none; }
  .board.is-wide .tile-meta { font-size: 0.85rem; }
  .board.is-mega .tile-meta { font-size: clamp(0.82rem, 2.8vw, 0.9rem); }
  .shelf-order { flex-basis: 100%; gap: 0.26rem; }
  .shelf-order .order-label { display: none; }
  .shelf-order .order-rank {
    min-width: 1.5rem;
    height: 1.42rem;
    padding-inline: 0.14rem;
    font-size: 0.95rem;
  }
  .shelf-order i { display: none; }
  .game-actions { grid-template-columns: repeat(3, 1fr); }
  .junction-panel { grid-template-columns: 1fr; }
  .junction-rack { justify-content: start; }
  .completion-card { grid-template-columns: 1fr; gap: 0.65rem; }
  .completion-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .prototype-note { display: grid; justify-content: start; gap: 0.18rem; }
}

@media (max-width: 380px) {
  .brand-mark { display: none; }
  .text-button { padding-inline: 0.35rem; }
  .shelf-row { gap: 0.2rem; }
  .shelf-heading { gap: 0.2rem; padding-inline: 0.18rem; }
  .shelf-heading strong { font-size: 0.86rem; }
  .shelf-order { gap: 0.15rem; }
  .board.is-wide .shelf-row,
  .board.is-mega .shelf-row {
    grid-template-columns: repeat(var(--rank-count), minmax(0, 1fr));
    gap: 0.1rem;
  }
  .board .shelf-row.has-signal-stacks {
    grid-template-columns: repeat(var(--stack-count), minmax(0, 1fr));
  }
  .shelf-row { grid-template-columns: repeat(var(--rank-count, 3), minmax(0, 1fr)); }
  .tile { min-height: 4.35rem; }
  .tile-symbol { font-size: 1.55rem; }
  .shelf-order .order-rank {
    min-width: 1.2rem;
    height: 1.24rem;
    padding-inline: 0.06rem;
    font-size: 0.86rem;
  }
  .shelf-order i { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}