/* =============================================
   单词填空 (Word Fill) 样式 - V3 填空+发音模式
   ============================================= */

/* wrapper样式 */
.wb-setup-wrap {
    text-align: center;
    padding: var(--space-xl);
    padding-top: var(--space-2xl);
    width: 100%;
    max-width: 900px;
    margin: var(--space-xl) auto;
    overflow-y: auto;
    max-height: calc(100% - var(--space-2xl));
    box-sizing: border-box;
    align-self: flex-start;
    background: linear-gradient(135deg, rgba(20, 20, 40, 0.95), rgba(26, 26, 10, 0.95));
    border-radius: 12px;
    border: 1px solid rgba(0, 255, 255, 0.15);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

/* 年级按钮紧凑样式 */
#game-canvas-container .grade-btn {
    padding: 12px 10px;
    font-size: 1rem;
}

#game-canvas-container .grade-btn.active {
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.6), 0 6px 18px rgba(0, 0, 0, 0.3);
    transform: scale(1.03);
}

/* 游戏信息栏 */
.wb-info-bar {
    display: flex;
    gap: 10px;
    width: 100%;
    max-width: 700px;
    margin: 0 auto 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.wb-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 255, 255, 0.15);
    border-radius: 12px;
    padding: 8px 14px;
    min-width: 100px;
}

.wb-stat-icon {
    font-size: 1.3em;
}

.wb-stat-body {
    display: flex;
    flex-direction: column;
}

.wb-stat-label {
    font-size: 0.7em;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wb-stat-val {
    font-size: 1.1em;
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 0 0 8px rgba(251, 191, 36, 0.5);
}

/* ─── 题目卡片区域 ─── */
.wb-card-area {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 16px;
    min-height: 400px;
    flex: 1;
}

/* 题目卡片 */
.wb-card {
    position: relative;
    background: linear-gradient(135deg, rgba(30, 30, 60, 0.95), rgba(40, 30, 80, 0.95));
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 20px;
    padding: 36px 32px;
    width: 100%;
    max-width: 600px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(167, 139, 250, 0.1);
    animation: wbCardIn 0.4s ease-out;
}

@keyframes wbCardIn {
    from { transform: scale(0.9) translateY(20px); opacity: 0; }
    to { transform: scale(1) translateY(0); opacity: 1; }
}

/* 中文意思 */
.wb-card-meaning {
    font-size: 2em;
    font-weight: 800;
    color: #FFD700;
    margin-bottom: 8px;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
    letter-spacing: 2px;
}

/* 音标 */
.wb-card-phonetic {
    font-size: 1.2em;
    color: rgba(167, 139, 250, 0.9);
    margin-bottom: 16px;
    font-family: 'Fira Code', monospace;
    letter-spacing: 1px;
    text-shadow: 0 0 10px rgba(167, 139, 250, 0.3);
}

/* 发音按钮区域 */
.wb-audio-btn-wrap {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 16px;
}

.wb-audio-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 10px;
    font-size: 0.85em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
    display: flex;
    align-items: center;
    gap: 4px;
}

.wb-audio-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    outline: none;
}

.wb-audio-btn:focus {
    outline: none;
}

.wb-audio-btn:active {
    transform: translateY(0);
}

.wb-word-audio-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.3);
}

.wb-sentence-audio-btn {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    box-shadow: 0 3px 10px rgba(245, 87, 108, 0.3);
}

/* 英文句子 */
.wb-card-sentence {
    font-size: 1.4em;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    margin-bottom: 28px;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-family: 'Fira Code', monospace;
    letter-spacing: 0.5px;
}

/* 输入区域 */
.wb-input-wrap {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.wb-input {
    flex: 1;
    padding: 14px 18px;
    border: 2px solid rgba(167, 139, 250, 0.4);
    border-radius: 14px;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    font-size: 1.2em;
    font-weight: 600;
    outline: none;
    transition: all 0.3s;
    font-family: 'Fira Code', monospace;
    letter-spacing: 1px;
}

.wb-input::placeholder {
    color: rgba(255, 255, 255, 0.3);
    font-family: 'Nunito', sans-serif;
    letter-spacing: 0;
}

.wb-input:focus {
    border-color: #A78BFA;
    box-shadow: 0 0 20px rgba(167, 139, 250, 0.3);
    background: rgba(0, 0, 0, 0.4);
}

.wb-input-correct {
    border-color: #48BB78 !important;
    box-shadow: 0 0 20px rgba(72, 187, 120, 0.4) !important;
    background: rgba(72, 187, 120, 0.1) !important;
}

.wb-input-wrong {
    border-color: #FF6B6B !important;
    box-shadow: 0 0 20px rgba(255, 107, 107, 0.3) !important;
}



.wb-submit-btn {
    padding: 14px 22px;
    border: none;
    border-radius: 14px;
    background: linear-gradient(135deg, #48BB78, #38A169);
    color: white;
    font-size: 1.3em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 15px rgba(72, 187, 120, 0.3);
    outline: none;
}

.wb-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
    outline: none;
}

.wb-submit-btn:focus {
    outline: none;
}

.wb-submit-btn:focus-visible {
    outline: none;
}

.wb-submit-btn:active {
    transform: translateY(0);
}

/* 反馈区域 */
.wb-feedback {
    min-height: 28px;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s;
    margin-top: 8px;
    padding-top: 8px;
}

.wb-feedback-correct {
    color: #48BB78;
    text-shadow: 0 0 10px rgba(72, 187, 120, 0.5);
}

.wb-feedback-wrong {
    color: #FF6B6B;
    text-shadow: 0 0 10px rgba(255, 107, 107, 0.5);
}

/* ─── 保留的通用样式 ─── */

/* 爆炸区域（保留兼容） */
.wb-blast-area {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    align-content: flex-start;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
    min-height: 500px;
}

/* 控制按钮 */
.wb-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 12px;
    flex-wrap: wrap;
}

.wb-ctrl-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.wb-ctrl-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.wb-ctrl-pause { background: linear-gradient(135deg, #667eea, #764ba2); }
.wb-ctrl-restart { background: linear-gradient(135deg, #FF6B6B, #FF8E53); }
.wb-ctrl-back { background: rgba(255, 255, 255, 0.2); backdrop-filter: blur(5px); }

/* 浮动提示 */
.wb-float {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 12px 28px;
    border-radius: 30px;
    color: white;
    font-weight: 700;
    font-size: 1.1em;
    z-index: 9999;
    pointer-events: none;
    animation: wbFloatUp 0.75s ease-out forwards;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

@keyframes wbFloatUp {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
    20% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
    80% { transform: translate(-50%, -80%) scale(1); opacity: 1; }
    100% { transform: translate(-50%, -100%) scale(0.8); opacity: 0; }
}

/* 结算遮罩 */
.wb-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 12, 41, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    animation: wbOverlayIn 0.3s ease-out;
}

@keyframes wbOverlayIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.wb-result-box {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 1px solid rgba(255, 217, 61, 0.3);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    max-width: 380px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: wbResultIn 0.5s ease-out;
}

@keyframes wbResultIn {
    from { transform: scale(0.8) translateY(30px); opacity: 0; }
    to { transform: scale(1) translateY(0); opacity: 1; }
}

.wb-result-emoji {
    font-size: 3.5em;
    margin-bottom: 10px;
    animation: wbResultBounce 1s ease-in-out infinite;
}

@keyframes wbResultBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.wb-result-title {
    font-family: var(--font-display);
    font-size: 1.8em;
    margin-bottom: 8px;
}

.wb-result-stars {
    font-size: 1.8em;
    margin: 8px 0;
}

.wb-result-sub {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
    margin-bottom: 16px;
}

.wb-result-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.wb-result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.wb-stat-num {
    font-size: 1.6em;
    font-weight: 800;
    text-shadow: 0 0 10px currentColor;
}

.wb-stat-lbl {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.5);
}

.wb-result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.wb-result-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 0.95em;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}

.wb-result-btn:hover {
    transform: translateY(-2px);
}

.wb-result-retry {
    background: linear-gradient(135deg, #FF6B6B, #FF8E53);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.wb-result-back {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(5px);
}



/* 跳过按钮样式 */
.wb-skip-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    outline: none;
    z-index: 10;
}

.wb-skip-btn:hover {
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.1);
}

.wb-skip-btn:focus {
    outline: none;
}

.wb-skip-btn:active {
    transform: scale(0.95);
}

.wb-skip-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
    background: transparent;
}

/* 跳过状态样式 */
.wb-input-skip {
    border-color: #FFA500 !important;
    box-shadow: 0 0 20px rgba(255, 165, 0, 0.3) !important;
    background: rgba(255, 165, 0, 0.1) !important;
}

.wb-feedback-skip {
    color: #FFA500;
    text-shadow: 0 0 10px rgba(255, 165, 0, 0.5);
}

/* 响应式 */
@media (max-width: 600px) {
    .wb-card {
        padding: 24px 20px;
    }
    .wb-card-meaning {
        font-size: 1.6em;
    }
    .wb-card-phonetic {
        font-size: 1.1em;
    }
    .wb-audio-btn-wrap {
        gap: 8px;
    }
    .wb-audio-btn {
        padding: 6px 12px;
        font-size: 0.8em;
    }
    .wb-card-sentence {
        font-size: 1em;
        padding: 12px 14px;
    }
    .wb-stat {
        min-width: 80px;
        padding: 6px 10px;
    }
}