/* ------------------------------------------------------------------
   Rope Tangle — randolf.dev
   Game-specific styles. Scoped to .rt / .rt-page; shared site CSS
   (style.css) is untouched.
   ------------------------------------------------------------------ */

.rt [hidden] {
  display: none;
}

.rt-page .page-head {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.rt-page .page-title {
  margin-bottom: 0.8rem;
}

.rt-rule {
  margin-top: 0.75rem;
  font-size: 10px;
  letter-spacing: 0.18em;
}

/* --- controls / HUD ---------------------------------------------- */

.rt-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.rt-hud {
  display: flex;
  gap: 1.75rem;
}

.rt-stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 3.5rem;
}

.rt-stat-label {
  font-size: 10px;
}

.rt-stat-value {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--fg);
}

.rt-stat-value[data-hot="true"] {
  color: var(--accent);
}

.rt-controls-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rt-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease), opacity 0.3s var(--ease);
}

.rt-btn:hover {
  color: var(--fg);
  border-color: var(--muted);
}

.rt-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.rt-btn:disabled:hover {
  color: var(--muted);
  border-color: var(--line);
}

.rt-btn.is-confirming {
  color: #ff7a7a;
  border-color: rgba(255, 122, 122, 0.5);
}

.rt-btn:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

/* --- level selector ------------------------------------------------ */

.rt-levels-panel {
  margin-bottom: 1.5rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--bg-2);
}

.rt-diff-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.rt-diff-tab {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease),
    background 0.3s var(--ease);
}

.rt-diff-tab:hover {
  color: var(--fg);
  border-color: var(--muted);
}

.rt-diff-tab[aria-pressed="true"] {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent);
}

.rt-diff-tab:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

.rt-levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: 0.5rem;
}

.rt-level-btn {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.6rem 0;
  text-align: center;
  cursor: pointer;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.rt-level-btn:hover {
  border-color: var(--muted);
}

.rt-level-btn:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

.rt-level-btn.is-done {
  color: var(--accent);
  border-color: rgba(201, 244, 77, 0.4);
}

.rt-level-btn[aria-current="true"] {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent);
}

.rt-level-btn[disabled] {
  opacity: 0.3;
  cursor: default;
}

.rt-level-btn[disabled]:hover {
  border-color: var(--line);
}

/* --- result panel --------------------------------------------------- */

.rt-result {
  display: grid;
  gap: 0.5rem;
  justify-items: start;
  margin-bottom: 1.5rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(201, 244, 77, 0.3);
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  background: var(--bg-2);
  animation: rt-result-in 240ms var(--ease) both;
}

.rt-result-title {
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.rt-result-meta {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.rt-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.rt-playagain {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
  transition: opacity 0.2s var(--ease);
}

.rt-playagain:hover {
  opacity: 0.85;
}

.rt-playagain:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

@keyframes rt-result-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* --- board ------------------------------------------------------------ */

.rt-board-wrap {
  display: flex;
  justify-content: center;
}

.rt-board {
  width: 100%;
  max-width: 640px;
  padding: clamp(6px, 1.6vw, 14px);
  background: radial-gradient(
    120% 135% at 50% 36%,
    #1e232c 0%,
    #161a21 55%,
    #101318 100%
  );
  border: 1px solid rgba(236, 236, 240, 0.09);
  border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04),
    0 20px 48px rgba(0, 0, 0, 0.45);
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.rt-board svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

/* --- ropes -------------------------------------------------------------- */

.rt-rope path,
.rt-x path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.rt-r-shadow,
.rt-x-shadow {
  stroke: rgba(0, 0, 0, 0.32);
  stroke-width: calc(var(--rt-w, 11px) + 6px);
  transform: translate(0.8px, 1.8px);
}

.rt-r-edge,
.rt-x-edge {
  stroke-width: calc(var(--rt-w, 11px) + 3px);
}

.rt-r-body,
.rt-x-body {
  stroke-width: var(--rt-w, 11px);
}

.rt-r-hi,
.rt-x-hi {
  stroke-width: calc(var(--rt-w, 11px) * 0.34);
  opacity: 0.55;
  transform: translate(-0.4px, -0.8px);
}

.rt-rope.is-active .rt-r-hi {
  opacity: 0.75;
}

/* --- pegs ----------------------------------------------------------------- */

.rt-peg {
  cursor: pointer;
  outline: none;
}

.rt-peg-hit,
.rt-cap-hit {
  fill: #000;
  fill-opacity: 0;
  stroke: none;
}

.rt-peg-rim {
  fill: #262c36;
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 1;
  transition: stroke 0.2s var(--ease);
}

.rt-peg-ring {
  fill: none;
  stroke: transparent;
  stroke-width: 1.4;
  stroke-dasharray: 2.2 3;
  transition: stroke 0.2s var(--ease);
}

.rt-peg-hole {
  fill: #0d1016;
}

.rt-peg-hole2 {
  fill: #060709;
}

.rt-peg-target {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.4;
  opacity: 0;
  transition: opacity 0.18s var(--ease);
}

.rt-peg.is-target .rt-peg-ring {
  stroke: rgba(201, 244, 77, 0.28);
}

.rt-peg.is-target .rt-peg-target {
  opacity: 0.3;
}

.rt-peg.is-near .rt-peg-target {
  opacity: 1;
  stroke-width: 1.8;
}

.rt-peg.is-near .rt-peg-rim {
  stroke: rgba(201, 244, 77, 0.85);
}

.rt-peg.is-focus .rt-peg-target {
  opacity: 1;
  stroke: var(--fg);
}

/* --- endpoint caps ------------------------------------------------------------ */

.rt-cap {
  cursor: grab;
  outline: none;
}

.rt-cap:active {
  cursor: grabbing;
}

.rt-cap-ring {
  fill: none;
  stroke: transparent;
  stroke-width: 1.4;
  transition: stroke 0.2s var(--ease);
}

.rt-cap-base {
  stroke: #0b0d11;
  stroke-width: 1.2;
  transition: transform 0.16s var(--ease);
  transform-box: fill-box;
  transform-origin: center;
}

.rt-cap-hi {
  transition: transform 0.16s var(--ease);
  transform-box: fill-box;
  transform-origin: center;
}

.rt-cap.is-lifted .rt-cap-base,
.rt-cap.is-lifted .rt-cap-hi {
  transform: scale(1.28);
}

.rt-cap.is-lifted .rt-cap-base {
  stroke: rgba(255, 255, 255, 0.35);
}

.rt-cap.is-selected .rt-cap-ring,
.rt-cap.is-focus .rt-cap-ring {
  stroke: var(--accent);
  stroke-dasharray: 2.2 2.4;
}

.rt-cap.is-focus .rt-cap-ring {
  stroke: var(--fg);
}

/* --- victory -------------------------------------------------------------------- */

svg.is-won .rt-rope .rt-r-body {
  animation: rt-win-body 700ms var(--ease) both;
  animation-delay: calc(var(--ri, 0) * 80ms);
}

svg.is-won .rt-rope .rt-r-hi {
  animation: rt-win-hi 700ms var(--ease) both;
  animation-delay: calc(var(--ri, 0) * 80ms);
}

svg.is-won .rt-peg-rim {
  animation: rt-win-peg 900ms var(--ease) both;
  animation-delay: calc(var(--ri, 0) * 80ms);
}

@keyframes rt-win-body {
  0% { filter: brightness(1); }
  45% { filter: brightness(1.45); }
  100% { filter: brightness(1.12); }
}

@keyframes rt-win-hi {
  0% { opacity: 0.55; }
  45% { opacity: 0.9; }
  100% { opacity: 0.7; }
}

@keyframes rt-win-peg {
  0% { stroke: rgba(255, 255, 255, 0.1); }
  45% { stroke: rgba(201, 244, 77, 0.7); }
  100% { stroke: rgba(255, 255, 255, 0.1); }
}

/* --- help / a11y ------------------------------------------------------------------ */

.rt-help {
  display: grid;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.rt-help .para {
  margin: 0;
}

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

/* --- responsive ----------------------------------------------------------------------- */

@media (max-width: 640px) {
  .rt-page {
    padding-left: 3vw;
    padding-right: 3vw;
  }

  .rt-controls {
    justify-content: flex-start;
  }

  .rt-hud {
    gap: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rt-btn,
  .rt-diff-tab,
  .rt-level-btn,
  .rt-peg-rim,
  .rt-peg-ring,
  .rt-peg-target,
  .rt-cap-ring,
  .rt-cap-base,
  .rt-cap-hi,
  .rt-playagain {
    transition: none;
  }

  svg.is-won .rt-rope .rt-r-body,
  svg.is-won .rt-rope .rt-r-hi,
  svg.is-won .rt-peg-rim,
  .rt-result {
    animation: none !important;
  }

  .rt-cap.is-lifted .rt-cap-base,
  .rt-cap.is-lifted .rt-cap-hi {
    transform: none;
  }
}