/* ===============================================
   动画效果
   =============================================== */

/* 标题弹跳 */
@keyframes titleBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* 勋章弹出 */
@keyframes badgePop {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* 勋章旋转 */
@keyframes badgeSpin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* 眨眼动画 */
@keyframes eyeBlink {

    0%,
    45%,
    55%,
    100% {
        transform: scaleY(1);
    }

    50% {
        transform: scaleY(0.1);
    }
}

/* 淡入 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 淡出 */
@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* 缩放弹跳 */
@keyframes scaleBounce {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

/* 摇晃 */
@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-10px);
    }

    75% {
        transform: translateX(10px);
    }
}

/* 脉冲 */
@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

/* 浮动 */
@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

/* 旋转 */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* 心跳 */
@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    14% {
        transform: scale(1.3);
    }

    28% {
        transform: scale(1);
    }

    42% {
        transform: scale(1.3);
    }

    70% {
        transform: scale(1);
    }
}

/* 闪烁 */
@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

/* 滑入（从上） */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 滑入（从下） */
@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* 彩虹边框 */
@keyframes rainbowBorder {
    0% {
        border-color: #FF6B6B;
    }

    16% {
        border-color: #FFD93D;
    }

    33% {
        border-color: #6BCB77;
    }

    50% {
        border-color: #4D96FF;
    }

    66% {
        border-color: #9B59B6;
    }

    83% {
        border-color: #FF6B9D;
    }

    100% {
        border-color: #FF6B6B;
    }
}

/* 星星闪烁 */
@keyframes starTwinkle {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

/* ===============================================
   掉落动画类
   =============================================== */

.falling-letter {
    animation: float 2s ease-in-out infinite;
}

.letter-collected {
    animation: fadeOut 0.3s ease forwards;
}

.letter-missed {
    animation: shake 0.3s ease, fadeOut 0.5s ease 0.3s forwards;
}

/* ===============================================
   得分动画
   =============================================== */

.score-popup {
    position: absolute;
    font-size: 32px;
    font-weight: 900;
    pointer-events: none;
    animation: scoreFloat 1s ease-out forwards;
}

.score-popup.positive {
    color: #4CAF50;
}

.score-popup.negative {
    color: #E57373;
}

@keyframes scoreFloat {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translateY(-80px) scale(1.5);
    }
}

/* ===============================================
   粒子效果
   =============================================== */

.particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.particle-star {
    animation: particleFly 0.8s ease-out forwards;
}

@keyframes particleFly {
    0% {
        opacity: 1;
        transform: translate(0, 0) scale(1);
    }

    100% {
        opacity: 0;
        transform: translate(var(--tx, 50px), var(--ty, -50px)) scale(0);
    }
}

/* ===============================================
   倒计时动画
   =============================================== */

.timer-warning {
    animation: pulse 0.5s ease infinite;
    color: #FF9800 !important;
}

.timer-critical {
    animation: heartbeat 1s ease infinite;
    color: #F44336 !important;
}

/* ===============================================
   按钮悬停效果
   =============================================== */

.btn-primary:hover {
    animation: scaleBounce 0.3s ease;
}

.avatar-btn:hover {
    animation: scaleBounce 0.2s ease;
}

.mode-card:hover:not(.locked) {
    animation: float 3s ease-in-out infinite;
}

/* ===============================================
   加载动画
   =============================================== */

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #E8F5E9;
    border-top-color: #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===============================================
   过渡类
   =============================================== */

.transition-fade {
    transition: opacity 0.3s ease;
}

.transition-scale {
    transition: transform 0.3s ease;
}

.transition-all {
    transition: all 0.3s ease;
}

/* 入场动画 */
.animate-in {
    animation: fadeIn 0.5s ease forwards;
}

.animate-out {
    animation: fadeOut 0.3s ease forwards;
}

/* ===============================================
   特效层
   =============================================== */

.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 9999;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        opacity: 1;
        transform: translateY(-100px) rotate(0deg);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) rotate(720deg);
    }
}