/**
 * 你畫我猜 (sketch-chain) — White Studio arcade art shell.
 * Dark-only; scoped under .sketch-chain-page. Uses --ws-* tokens.
 * Drawing canvas stays light paper; chrome / lobby / reveal use black-purple neon.
 */

.sketch-chain-page {
  --sc-panel-bg: color-mix(in srgb, var(--ws-panel) 92%, #000);
  --sc-panel-glow: color-mix(in srgb, var(--ws-accent) 18%, transparent);
  --sc-status-cyan: #62e7ff;
  --sc-paper: #f4f3fb;
  --sc-grid: rgba(138, 43, 226, 0.08);
  --sc-ink: #1b1826;
  --sc-scrim: rgba(7, 6, 12, 0.78);
}

.sketch-chain-page.is-sc-playing .ws-site-footer {
  display: none;
}

.sketch-chain-page.is-sc-playing .ws-site-header {
  display: none;
}

.sketch-chain-shell {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  color-scheme: dark;
  color: var(--ws-text-primary);
  font-family: var(--ws-font-body);
  margin: 0 auto;
  max-width: 960px;
  width: 100%;
  position: relative;
  padding-inline: max(1rem, env(safe-area-inset-left));
  padding-bottom: max(1rem, env(safe-area-inset-bottom));
  background:
    radial-gradient(ellipse 70% 50% at 50% -10%, color-mix(in srgb, var(--ws-accent) 22%, transparent), transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 80%, color-mix(in srgb, var(--ws-accent-2) 10%, transparent), transparent 55%),
    var(--ws-bg-page);
}

.sketch-chain-page.is-sc-playing .sketch-chain-shell {
  max-width: none;
  height: 100dvh;
  overflow: hidden;
  padding-top: env(safe-area-inset-top);
}

.sketch-chain-play-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0 4px;
  flex-shrink: 0;
}

.sketch-chain-app {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.sketch-chain-app * {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

.sketch-chain-app.lock-scroll {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  touch-action: none;
}

.sketch-chain-app .num {
  font-family: var(--ws-font-display);
  font-size: 0.85em;
  letter-spacing: 0.04em;
}

.sketch-chain-app .brush-title {
  font-family: var(--ws-font-display);
  letter-spacing: 0.06em;
  line-height: 1.45;
  color: var(--ws-text-primary);
  text-shadow: var(--ws-neon-glow);
}

.sketch-chain-app button {
  font-family: inherit;
  cursor: pointer;
}

.sketch-chain-app input,
.sketch-chain-app textarea {
  font-family: inherit;
  font-size: 16px;
}

.sketch-chain-app .screen {
  display: none;
  flex: 1;
  min-height: 0;
  padding: 12px 0 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  flex-direction: column;
}

.sketch-chain-app .screen.active {
  display: flex;
}

/* —— Buttons (game-scoped; map to WS look) —— */
.sketch-chain-app .btn {
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--ws-accent) 45%, var(--ws-border-subtle));
  border-radius: var(--ws-radius-sm, 12px);
  padding: 12px 20px;
  min-height: var(--ws-touch-min, 44px);
  background: var(--button-gradient);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ws-text-inverse);
  box-shadow: var(--ws-shadow-button);
  transition: transform var(--ws-duration-fast, 0.15s) var(--ws-ease-out, ease),
    box-shadow var(--ws-duration-fast, 0.15s) var(--ws-ease-out, ease),
    border-color var(--ws-duration-fast, 0.15s) var(--ws-ease-out, ease);
}

@media (hover: hover) and (pointer: fine) {
  .sketch-chain-app .btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--ws-neon-glow-strong);
  }
}

.sketch-chain-app .btn:active:not(:disabled) {
  transform: translateY(1px);
}

.sketch-chain-app .btn.ghost {
  background: var(--ws-bg-button);
  color: var(--ws-text-primary);
  border-color: var(--ws-border-subtle);
  box-shadow: none;
}

.sketch-chain-app .btn.green,
.sketch-chain-app .btn.blue {
  background: var(--button-gradient);
  color: var(--ws-text-inverse);
}

.sketch-chain-app .btn.sm {
  padding: 8px 14px;
  min-height: 36px;
  font-size: 0.82rem;
}

.sketch-chain-app .btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.sketch-chain-app .btn.full {
  width: 100%;
}

/* —— Panels / cards —— */
.sketch-chain-app .card {
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, var(--sc-panel-glow), transparent 55%),
    var(--sc-panel-bg);
  border: 1px solid color-mix(in srgb, var(--ws-border-subtle) 80%, transparent);
  border-radius: var(--ws-radius-md, 16px);
  box-shadow: var(--ws-shadow-soft);
}

.sketch-chain-app .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--ws-accent) 50%, var(--ws-border-subtle));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  background: var(--ws-bg-surface-raised);
  box-shadow: var(--ws-neon-glow);
}

.sketch-chain-app .pill {
  border: 1px solid var(--ws-border-subtle);
  border-radius: 999px;
  padding: 6px 14px;
  background: var(--ws-bg-surface);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--ws-text-secondary);
}

/* —— Lobby —— */
#screen-lobby {
  align-items: center;
  justify-content: flex-start;
}

.sketch-chain-app .lobby-wrap {
  width: 100%;
  max-width: 820px;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  align-items: center;
  margin: 0 auto;
}

.sketch-chain-app .lobby-header {
  text-align: center;
  padding: 0.35rem 0 0.15rem;
}

.sketch-chain-app .lobby-header h1 {
  font-size: clamp(1.15rem, 4.2vw, 1.65rem);
  margin: 0 0 0.45rem;
}

.sketch-chain-app .lobby-header p {
  margin: 0;
  color: var(--ws-text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  line-height: 1.45;
  max-width: 36rem;
}

.sketch-chain-app .lobby-grid {
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 1rem;
}

.sketch-chain-app .lobby-card {
  padding: 1.05rem 1.15rem;
}

.sketch-chain-app .lobby-card h2 {
  font-family: var(--ws-font-display);
  font-size: clamp(0.62rem, 1.6vw, 0.78rem);
  margin: 0 0 0.85rem;
  letter-spacing: 0.06em;
  color: var(--ws-accent-2);
}

.sketch-chain-app .field {
  margin-bottom: 0.85rem;
}

.sketch-chain-app .field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--ws-text-muted);
}

.sketch-chain-app .field input[type="text"],
.sketch-chain-app .field input[type="range"] {
  width: 100%;
}

.sketch-chain-app .field input[type="text"] {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--ws-border-subtle);
  border-radius: var(--ws-radius-sm, 12px);
  background: var(--ws-bg-input);
  color: var(--ws-text-primary);
}

.sketch-chain-app .field input[type="text"]::placeholder {
  color: var(--ws-text-disabled);
}

.sketch-chain-app .field input[type="text"]:focus {
  outline: none;
  border-color: var(--ws-border-focus);
  box-shadow: 0 0 0 3px var(--ws-accent-soft);
}

.sketch-chain-app .field input[type="range"] {
  accent-color: var(--ws-accent);
  height: 1.5rem;
}

.sketch-chain-app .room-code-row {
  display: flex;
  gap: 0.65rem;
  align-items: center;
}

.sketch-chain-app .room-code {
  font-family: var(--ws-font-display);
  font-size: clamp(0.85rem, 2.5vw, 1.1rem);
  letter-spacing: 0.28em;
  color: var(--sc-status-cyan);
  text-shadow: 0 0 12px rgba(98, 231, 255, 0.35);
  border: 1px dashed color-mix(in srgb, var(--sc-status-cyan) 45%, var(--ws-border-subtle));
  border-radius: var(--ws-radius-sm, 12px);
  padding: 0.55rem 0.9rem;
  background: color-mix(in srgb, var(--ws-bg-surface) 88%, #000);
  flex: 1;
  text-align: center;
}

.sketch-chain-app .player-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 8rem;
}

.sketch-chain-app .player-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--ws-border-subtle);
  border-radius: var(--ws-radius-sm, 12px);
  background: color-mix(in srgb, var(--ws-bg-surface-raised) 90%, transparent);
}

.sketch-chain-app .player-row .name {
  font-weight: 600;
  flex: 1;
  font-size: 0.9rem;
}

.sketch-chain-app .tag-you {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ws-accent-2);
}

.sketch-chain-app .lobby-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.15rem;
  flex-wrap: wrap;
  width: 100%;
}

.sketch-chain-app .lobby-actions .btn {
  min-width: min(100%, 16rem);
}

.sketch-chain-app .hint {
  font-size: 0.8rem;
  color: var(--ws-text-muted);
  text-align: center;
  max-width: 32rem;
  line-height: 1.45;
}

.sketch-chain-app .rule-box {
  font-size: 0.8rem;
  color: var(--ws-text-muted);
  background: color-mix(in srgb, var(--ws-bg-surface) 85%, transparent);
  border: 1px dashed color-mix(in srgb, var(--ws-accent) 28%, var(--ws-border-subtle));
  border-radius: var(--ws-radius-sm, 12px);
  padding: 0.7rem 0.9rem;
  line-height: 1.6;
}

.sketch-chain-app .sc-join-row {
  display: flex;
  gap: 0.65rem;
  align-items: flex-end;
}

.sketch-chain-app .sc-join-row .field {
  flex: 1;
  margin-bottom: 0;
}

.sketch-chain-app .sc-status {
  font-size: 0.85rem;
  color: var(--ws-text-muted);
  text-align: center;
  margin: 0.5rem 0 0;
}

.sketch-chain-app .sc-status.is-error {
  color: var(--ws-danger);
  font-weight: 700;
}

/* —— Stage —— */
#screen-stage {
  gap: 0.75rem;
}

.sketch-chain-app .stage-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.sketch-chain-app .stage-label {
  font-weight: 700;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ws-text-secondary);
}

.sketch-chain-app .timer {
  font-family: var(--ws-font-display);
  font-size: clamp(0.85rem, 2.2vw, 1.05rem);
  min-width: 3.2rem;
  text-align: center;
  color: var(--sc-status-cyan);
  text-shadow: 0 0 10px rgba(98, 231, 255, 0.35);
}

.sketch-chain-app .timer.low {
  color: var(--ws-danger);
  text-shadow: 0 0 10px rgba(255, 107, 122, 0.4);
}

.sketch-chain-app .progress-track {
  flex: 1;
  height: 8px;
  border: 1px solid var(--ws-border-subtle);
  border-radius: 999px;
  background: var(--ws-bg-surface);
  overflow: hidden;
  min-width: 100px;
}

.sketch-chain-app .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--ws-accent), var(--ws-accent-2));
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: var(--ws-neon-glow);
}

.sketch-chain-app .stage-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 0;
}

.sketch-chain-app .prompt-card {
  padding: 0.9rem 1.1rem;
  text-align: center;
}

.sketch-chain-app .prompt-card .label {
  font-size: 0.7rem;
  color: var(--ws-text-muted);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.sketch-chain-app .prompt-card .word {
  font-family: var(--ws-font-display);
  font-size: clamp(0.85rem, 2.8vw, 1.15rem);
  line-height: 1.5;
  color: var(--ws-text-primary);
}

.sketch-chain-app .prompt-card img {
  max-width: 100%;
  max-height: 34vh;
  border: 1px solid var(--ws-border-subtle);
  border-radius: var(--ws-radius-sm, 12px);
  background: var(--sc-paper);
}

.sketch-chain-app .text-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.sketch-chain-app .text-stage textarea {
  flex: 1;
  resize: none;
  border: 1px solid var(--ws-border-subtle);
  border-radius: var(--ws-radius-md, 16px);
  padding: 1rem;
  font-size: 1.05rem;
  background: var(--ws-bg-input);
  color: var(--ws-text-primary);
  min-height: 120px;
}

.sketch-chain-app .text-stage textarea:focus {
  outline: none;
  border-color: var(--ws-border-focus);
  box-shadow: 0 0 0 3px var(--ws-accent-soft);
}

.sketch-chain-app .char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--ws-text-muted);
}

.sketch-chain-app .draw-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-height: 0;
}

.sketch-chain-app .canvas-wrap {
  flex: 1;
  position: relative;
  border: 1px solid color-mix(in srgb, var(--ws-accent) 35%, var(--ws-border-subtle));
  border-radius: var(--ws-radius-sm, 12px);
  overflow: hidden;
  background: var(--sc-paper);
  background-image:
    linear-gradient(var(--sc-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--sc-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  min-height: 220px;
  touch-action: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), var(--ws-shadow-sm);
}

.sketch-chain-app #board {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: crosshair;
  display: block;
}

.sketch-chain-app .toolbar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  padding: 0.35rem 0.15rem;
}

.sketch-chain-app .pens {
  display: flex;
  gap: 0.45rem;
}

.sketch-chain-app .pen {
  width: 26px;
  height: 26px;
  border-radius: 50% 50% 50% 4px;
  border: 2px solid var(--ws-text-primary);
  transform: rotate(-45deg);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.35);
}

.sketch-chain-app .pen.active {
  transform: rotate(-45deg) translateY(-4px) scale(1.08);
  box-shadow: var(--ws-neon-glow);
}

.sketch-chain-app .sizes {
  display: flex;
  gap: 0.45rem;
  align-items: center;
}

.sketch-chain-app .size-dot {
  border: 2px solid var(--ws-border-subtle);
  border-radius: 50%;
  background: var(--ws-bg-surface);
  cursor: pointer;
}

.sketch-chain-app .size-dot.active {
  background: var(--ws-accent-2);
  border-color: var(--ws-accent-2);
}

.sketch-chain-app .tools-right {
  display: flex;
  gap: 0.45rem;
  margin-left: auto;
}

.sketch-chain-app .stage-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.65rem;
  padding-bottom: env(safe-area-inset-bottom);
}

.sketch-chain-app .waiting-overlay {
  position: fixed;
  inset: 0;
  background: var(--sc-scrim);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  backdrop-filter: blur(4px);
}

.sketch-chain-app .waiting-overlay.show {
  display: flex;
}

.sketch-chain-app .waiting-card {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--sc-panel-glow), transparent 55%),
    var(--sc-panel-bg);
  border: 1px solid color-mix(in srgb, var(--ws-accent) 40%, var(--ws-border-subtle));
  border-radius: var(--ws-radius-md, 16px);
  padding: 1.35rem 1.75rem;
  text-align: center;
  box-shadow: var(--ws-shadow-card);
  color: var(--ws-text-primary);
}

.sketch-chain-app .waiting-card .spin {
  font-size: 1.6rem;
  display: inline-block;
  animation: sc-spin 1s linear infinite;
  color: var(--ws-accent-2);
}

@keyframes sc-spin {
  to {
    transform: rotate(360deg);
  }
}

/* —— Reveal —— */
#screen-reveal {
  gap: 0.65rem;
  overflow: hidden;
}

.sketch-chain-app .reveal-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.sketch-chain-app .reveal-progress-track {
  height: 8px;
  border: 1px solid var(--ws-border-subtle);
  border-radius: 999px;
  background: var(--ws-bg-surface);
  overflow: hidden;
}

.sketch-chain-app .reveal-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ws-accent), var(--ws-accent-2));
  box-shadow: var(--ws-neon-glow);
}

.sketch-chain-app .reveal-chain-title {
  text-align: center;
  padding: 0.25rem 0 0;
  font-family: var(--ws-font-display);
  font-size: clamp(0.7rem, 2vw, 0.9rem);
  color: var(--ws-accent-2);
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.sketch-chain-app .reveal-splash {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.sketch-chain-app .reveal-splash .brush-title {
  font-size: clamp(1.1rem, 4vw, 1.6rem);
}

.sketch-chain-app .reveal-stage {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem 0.15rem 1.25rem;
}

.sketch-chain-app .chat-row {
  display: flex;
}

.sketch-chain-app .chat-row.right {
  justify-content: flex-end;
}

.sketch-chain-app .chat-row.left {
  justify-content: flex-start;
}

.sketch-chain-app .chat-col {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 74%;
}

.sketch-chain-app .chat-row.right .chat-col {
  align-items: flex-end;
}

.sketch-chain-app .chat-row.left .chat-col {
  align-items: flex-start;
}

.sketch-chain-app .chat-author {
  font-size: 0.7rem;
  color: var(--ws-text-muted);
  font-weight: 700;
}

.sketch-chain-app .text-bubble {
  border: 1px solid color-mix(in srgb, var(--ws-accent) 45%, transparent);
  border-radius: 16px;
  border-bottom-right-radius: 4px;
  padding: 0.7rem 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: var(--ws-neon-glow);
  background: linear-gradient(145deg, color-mix(in srgb, var(--ws-accent) 55%, #1b1826), #2a1848);
  color: var(--ws-text-inverse);
}

.sketch-chain-app .chat-row.left .text-bubble {
  border-bottom-right-radius: 16px;
  border-bottom-left-radius: 4px;
  background: linear-gradient(145deg, #1c1830, #241e38);
  border-color: var(--ws-border-subtle);
  box-shadow: var(--ws-shadow-sm);
}

.sketch-chain-app .image-bubble {
  border: 1px solid var(--ws-border-subtle);
  border-radius: 14px;
  border-bottom-left-radius: 4px;
  max-width: min(60vw, 240px);
  width: 100%;
  background: var(--sc-paper);
  box-shadow: var(--ws-shadow-sm);
  display: block;
}

.sketch-chain-app .reveal-end {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

@media (max-width: 780px) {
  .sketch-chain-app .lobby-grid {
    grid-template-columns: 1fr;
  }

  .sketch-chain-page.is-sc-playing #screen-stage,
  .sketch-chain-page.is-sc-playing #screen-reveal {
    overflow: hidden;
  }

  .sketch-chain-app .canvas-wrap {
    min-height: 38vh;
  }

  .sketch-chain-shell {
    max-width: none;
  }
}