#game-root {
    --wc-accent: #0EA5E9;
    --wc-accent-dark: #0369A1;
    --wc-accent-light: #E0F2FE;
    --wc-accent-border: #BAE6FD;
    --wc-glass-bg: rgba(255, 255, 255, .62);
    --wc-glass-border: rgba(255, 255, 255, .45);
    border-radius: var(--kw-radius, 16px);
}

/* ---------- Layout ---------- */

.wc-wrap-game {
    position: relative;
    margin: 0 auto;
}

.wc-canvas-frame {
    position: relative;
    width: 100%;
    height: 560px;
    max-height: 78vh;
    overflow: hidden;
    touch-action: none;
}

.wc-canvas-frame canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

.wc-canvas-frame canvas:active {
    cursor: grabbing;
}

/* ---------- Loading / fallback ---------- */

.wc-loading,
.wc-fallback {
    max-width: 420px;
    margin: 0 auto;
    text-align: center;
    padding: 48px 16px;
}

.wc-loading-icon {
    font-size: 40px;
    margin-bottom: 10px;
    animation: wc-pulse 1.2s ease-in-out infinite;
}

.wc-loading-text {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 1px 3px rgba(0, 0, 0, .2);
}

.wc-fallback-card {
    background: var(--wc-glass-bg);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border: 1px solid var(--wc-glass-border);
    border-radius: var(--kw-radius, 16px);
    padding: 32px 20px;
    box-shadow: 0 3px 12px rgba(0, 0, 0, .12);
}

.wc-fallback-emoji {
    font-size: 44px;
    margin-bottom: 10px;
}

.wc-fallback-text {
    font-size: 14px;
    font-weight: 700;
    color: var(--kw-text, #2D2A32);
}

/* ---------- Toolbar (floats over the canvas, matches science-solar-
   system-explorer's/science-discovery-earth's dark-glass toolbar/
   zoom-btn styling) ---------- */

.wc-toolbar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
    z-index: 4;
    pointer-events: none;
}

.wc-toolbar-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    pointer-events: auto;
}

.wc-toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid var(--wc-glass-border);
    background: rgba(20, 20, 50, .55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    border-radius: 999px;
    font-weight: 700;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    padding: 8px 14px;
    transition: transform .12s ease, background .15s ease;
    white-space: nowrap;
}

.wc-toolbar-btn svg {
    width: 15px;
    height: 15px;
}

.wc-toolbar-btn:hover {
    background: rgba(20, 20, 50, .75);
    transform: translateY(-1px);
}

.wc-stats-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(20, 20, 50, .55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #FDE68A;
    border: 1px solid var(--wc-glass-border);
    border-radius: 999px;
    font-weight: 800;
    font-size: 13px;
    padding: 8px 14px;
    white-space: nowrap;
    pointer-events: auto;
}

.wc-stats-pill svg {
    width: 15px;
    height: 15px;
}

/* ---------- Zoom controls (Google-Maps-style +/- buttons) ---------- */

.wc-zoom-controls {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    z-index: 4;
    display: flex;
    flex-direction: column;
    gap: 6px;
    pointer-events: auto;
}

.wc-zoom-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--wc-glass-border);
    background: rgba(20, 20, 50, .55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    border-radius: 12px;
    cursor: pointer;
    transition: transform .12s ease, background .15s ease;
}

.wc-zoom-btn:hover {
    background: rgba(20, 20, 50, .75);
}

.wc-zoom-btn:active {
    transform: scale(.92);
}

.wc-zoom-btn svg {
    width: 18px;
    height: 18px;
}

@media (max-width: 480px) {
    .wc-toolbar-label {
        display: none;
    }

    .wc-canvas-frame {
        height: 460px;
    }
}

/* ---------- Sheet (bottom sheet on mobile, centered modal on desktop —
   used for every panel/list/quiz screen) ---------- */

.wc-sheet-backdrop {
    position: absolute;
    inset: 0;
    z-index: 8;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    animation: wc-fade-in .2s ease;
}

.wc-sheet {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 82%;
    overflow-y: auto;
    background: #fff;
    border-radius: 20px 20px 0 0;
    padding: 22px 18px 26px;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, .25);
    animation: wc-sheet-up .25s ease;
}

@media (min-width: 640px) {
    .wc-sheet-backdrop {
        align-items: center;
    }

    .wc-sheet {
        border-radius: var(--kw-radius, 16px);
        max-height: 80%;
        animation: wc-pop .25s ease;
    }
}

.wc-sheet-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: var(--wc-accent-light);
    color: var(--wc-accent-dark);
    cursor: pointer;
}

.wc-sheet-close svg {
    width: 14px;
    height: 14px;
}

.wc-sheet-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border: none;
    background: none;
    color: var(--wc-accent-dark);
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    padding: 0 0 14px;
}

.wc-sheet-back svg {
    width: 12px;
    height: 12px;
}

/* ---------- Location panel ---------- */

.wc-location-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    padding-right: 30px;
}

.wc-location-icon {
    font-size: 44px;
    line-height: 1;
}

.wc-location-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.wc-location-name {
    font-size: 20px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
}

.wc-location-process {
    display: inline-block;
    width: fit-content;
    font-size: 12px;
    font-weight: 700;
    color: var(--wc-accent-dark);
    background: var(--wc-accent-light);
    padding: 2px 10px;
    border-radius: 999px;
}

.wc-location-desc {
    font-size: 14px;
    line-height: 1.5;
    color: #555;
    margin-bottom: 16px;
}

.wc-discovery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.wc-discovery-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    border: 1px solid var(--wc-accent-border);
    border-radius: 12px;
    background: var(--wc-accent-light);
    padding: 14px 8px;
    cursor: pointer;
    text-align: center;
    transition: transform .12s ease;
}

.wc-discovery-card:hover {
    transform: translateY(-2px);
}

.wc-discovery-card.wc-discovered {
    background: linear-gradient(135deg, var(--wc-accent-light), #fef9c3);
    border-color: #facc15;
}

.wc-discovery-emoji {
    font-size: 28px;
}

.wc-discovery-title {
    font-size: 13px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
}

.wc-discovery-status {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    font-weight: 700;
    color: var(--wc-accent-dark);
}

.wc-discovery-status svg {
    width: 11px;
    height: 11px;
}

/* ---------- Discovery detail ---------- */

.wc-detail-emoji {
    font-size: 48px;
    text-align: center;
    margin-bottom: 8px;
}

.wc-detail-title {
    font-size: 18px;
    font-weight: 800;
    text-align: center;
    color: var(--kw-text, #2D2A32);
    margin-bottom: 4px;
}

.wc-detail-meta {
    font-size: 12px;
    font-weight: 700;
    text-align: center;
    color: var(--wc-accent-dark);
    margin-bottom: 14px;
}

.wc-detail-fact {
    font-size: 14px;
    line-height: 1.6;
    color: #444;
    margin-bottom: 14px;
}

.wc-detail-new {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 800;
    color: #92400e;
    background: #fef9c3;
    border: 1px solid #facc15;
    border-radius: 999px;
    padding: 8px 14px;
}

/* ---------- Groups ---------- */

.wc-list-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
    margin-bottom: 14px;
    text-align: center;
}

.wc-group-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.wc-group-card {
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--wc-accent-border);
    border-radius: 14px;
    background: var(--wc-accent-light);
    padding: 14px;
    cursor: pointer;
    text-align: left;
    transition: transform .12s ease;
}

.wc-group-card:hover {
    transform: translateY(-2px);
}

.wc-group-emoji {
    font-size: 32px;
}

.wc-group-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.wc-group-name {
    font-size: 15px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
}

.wc-group-desc {
    font-size: 12px;
    color: #666;
}

.wc-group-progress {
    height: 6px;
    border-radius: 999px;
    background: #fff;
    overflow: hidden;
}

.wc-group-progress-fill {
    height: 100%;
    background: var(--wc-accent);
    border-radius: 999px;
}

.wc-group-stat {
    font-size: 11px;
    font-weight: 700;
    color: var(--wc-accent-dark);
}

.wc-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.wc-chip {
    border: 1px solid var(--wc-accent-border);
    background: var(--wc-accent-light);
    color: var(--wc-accent-dark);
    border-radius: 999px;
    padding: 8px 14px;
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
}

.wc-chip.wc-discovered {
    background: #fef9c3;
    border-color: #facc15;
    color: #92400e;
}

/* ---------- Search ---------- */

.wc-search-input {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--wc-accent-border);
    border-radius: 999px;
    padding: 10px 16px;
    font-size: 14px;
    margin-bottom: 14px;
    outline: none;
}

.wc-search-input:focus {
    border-color: var(--wc-accent);
}

.wc-search-results {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.wc-search-result {
    display: flex;
    align-items: center;
    gap: 10px;
    border: none;
    background: var(--wc-accent-light);
    border-radius: 10px;
    padding: 10px 12px;
    cursor: pointer;
    text-align: left;
}

.wc-search-result-emoji {
    font-size: 24px;
}

.wc-search-result-title {
    font-size: 13px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
}

.wc-search-result-meta {
    font-size: 11px;
    color: #666;
}

.wc-search-empty {
    text-align: center;
    color: #888;
    font-size: 13px;
    padding: 20px 0;
}

/* ---------- Quiz ---------- */

.wc-quiz-question {
    font-size: 16px;
    font-weight: 800;
    color: var(--kw-text, #2D2A32);
    margin-bottom: 16px;
    padding-right: 26px;
}

.wc-quiz-choices {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 14px;
}

.wc-quiz-choice {
    border: 2px solid var(--wc-accent-border);
    background: #fff;
    border-radius: 12px;
    padding: 12px 14px;
    font-weight: 700;
    font-size: 14px;
    text-align: left;
    cursor: pointer;
    transition: transform .1s ease;
}

.wc-quiz-choice:hover:not(:disabled) {
    transform: translateY(-1px);
}

.wc-quiz-choice:disabled {
    cursor: default;
}

.wc-quiz-choice.wc-correct {
    border-color: var(--wc-accent);
    background: var(--wc-accent-light);
}

.wc-quiz-choice.wc-incorrect {
    border-color: #FCA5A5;
    background: #FEF2F2;
}

.wc-quiz-feedback {
    font-size: 13px;
    font-weight: 700;
    padding: 10px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
}

.wc-quiz-feedback.wc-correct {
    background: var(--wc-accent-light);
    color: var(--wc-accent-dark);
}

.wc-quiz-feedback.wc-incorrect {
    background: #FEF2F2;
    color: #991B1B;
}

.wc-quiz-next-btn {
    display: block;
    width: 100%;
    border: none;
    background: var(--wc-accent);
    color: #fff;
    border-radius: 999px;
    padding: 12px;
    font-weight: 800;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 3px 0 var(--wc-accent-dark);
}

/* ---------- Keyframes ---------- */

@keyframes wc-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes wc-pop {
    0% { transform: scale(.85); }
    100% { transform: scale(1); }
}

@keyframes wc-sheet-up {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes wc-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: .7; }
}