/* ==================== 练习体验增强样式 ==================== */

/* 连击数字弹跳动画 */
.stat-item #streak-text.streak-bump {
    animation: streakBump 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes streakBump {
    0% {
        transform: scale(1);
        color: var(--text-primary);
    }
    30% {
        transform: scale(1.6);
        color: var(--accent-success);
        text-shadow: 0 0 12px rgba(0, 184, 148, 0.4);
    }
    100% {
        transform: scale(1);
        color: var(--text-primary);
        text-shadow: none;
    }
}

/* 里程碑庆祝浮层 */
.milestone-badge {
    position: fixed;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0) rotate(-10deg);
    font-size: clamp(1.5rem, 5vw, 2.2rem);
    font-weight: 800;
    color: var(--accent-primary);
    text-align: center;
    pointer-events: none;
    z-index: 1000;
    white-space: nowrap;
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
    font-family: 'Nunito', sans-serif;
    letter-spacing: -0.01em;
}

.milestone-badge.show {
    transform: translate(-50%, -50%) scale(1) rotate(0deg);
    opacity: 1;
}

/* 快捷键提示条 */
.kb-hint-bar {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 28px;
    padding: 14px 0 0;
    font-size: 13px;
    color: var(--text-tertiary);
    flex-wrap: wrap;
    border-top: 1px dashed var(--accent-subtle);
}

.kb-hint-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.kb-hint-item kbd {
    display: inline-block;
    padding: 3px 10px;
    background: var(--bg-paper-warm);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    font-family: 'Nunito', monospace;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--accent-subtle);
}

/* 移动端：隐藏快捷键提示（触屏设备无键盘） */
@media (max-width: 600px) {
    .kb-hint-bar {
        gap: 12px;
        font-size: 12px;
    }

    .kb-hint-item kbd {
        padding: 2px 8px;
        font-size: 11px;
    }
}

/* 暗黑模式适配 */
body.dark-mode .kb-hint-item kbd {
    background: var(--bg-paper-warm);
    color: var(--text-secondary);
    border-color: var(--accent-subtle);
}

body.dark-mode .milestone-badge {
    color: var(--accent-primary);
    text-shadow: 0 0 20px rgba(162, 155, 254, 0.3);
}

body.dark-mode .stat-item #streak-text.streak-bump {
    animation: streakBumpDark 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes streakBumpDark {
    0% {
        transform: scale(1);
        color: var(--text-primary);
    }
    30% {
        transform: scale(1.6);
        color: var(--accent-success);
        text-shadow: 0 0 12px rgba(85, 230, 193, 0.4);
    }
    100% {
        transform: scale(1);
        color: var(--text-primary);
        text-shadow: none;
    }
}