/* 喝水计算器 - 动画和视觉效果 */

/* 页面切换动画 */
@keyframes pageSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes pageSlideOut {
    from {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateX(-100px) scale(0.95);
    }
}

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-5px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(5px);
    }
}

@keyframes glow {
    0% {
        box-shadow: 0 0 5px var(--primary-color);
    }
    50% {
        box-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--primary-color);
    }
    100% {
        box-shadow: 0 0 5px var(--primary-color);
    }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes progressFill {
    from {
        stroke-dashoffset: 283;
    }
    to {
        stroke-dashoffset: 0;
    }
}

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

/* 页面切换类 */
.page-enter {
    animation: pageSlideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-exit {
    animation: pageSlideOut 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 元素出现动画 */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in-down {
    animation: fadeInDown 0.6s ease-out;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.5s ease-out;
}

.bounce-in {
    animation: bounceIn 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* 按钮动画 */
.btn-animated {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-animated::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-animated:active::before {
    width: 300px;
    height: 300px;
}

.btn-hover-lift:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.btn-hover-scale:hover {
    transform: scale(1.05);
}

.btn-hover-glow:hover {
    box-shadow: 0 0 20px var(--primary-color);
}

/* 输入框动画 */
.input-focus {
    position: relative;
    transition: all 0.3s ease;
}

.input-focus:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.input-focus.error {
    animation: shake 0.5s ease-in-out;
}

.input-focus.success {
    animation: glow 0.5s ease-in-out;
}

/* 卡片动画 */
.card-hover {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card-enter {
    animation: fadeInUp 0.6s ease-out;
}

.card-stagger-1 { animation-delay: 0.1s; }
.card-stagger-2 { animation-delay: 0.2s; }
.card-stagger-3 { animation-delay: 0.3s; }
.card-stagger-4 { animation-delay: 0.4s; }

/* 进度条动画 */
.progress-animated {
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-number-animated {
    animation: numberCount 0.6s ease-out;
}

/* 加载动画 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-dots {
    display: inline-block;
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* 成功/错误状态动画 */
.success-animation {
    animation: bounceIn 0.6s ease-out;
    background: var(--success-color) !important;
    color: var(--text-white) !important;
}

.error-animation {
    animation: shake 0.5s ease-in-out;
    border-color: var(--error-color) !important;
    box-shadow: 0 0 10px rgba(231, 76, 60, 0.3) !important;
}

/* 波纹效果 */
.ripple-effect {
    position: relative;
    overflow: hidden;
}

.ripple-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: ripple 0.6s ease-out;
}

/* 渐变背景动画 */
.gradient-bg {
    background: linear-gradient(-45deg, #667eea, #764ba2, #4ecdc4, #ff9a9e);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100px);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 浮动动画 */
.float {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* 呼吸动画 */
.breathe {
    animation: breathe 2s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* 打字机效果 */
.typewriter {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    animation: typing 3s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--primary-color); }
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 性能优化 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .btn-animated,
    .card-hover,
    .input-focus {
        border: 2px solid currentColor;
    }
}

/* 深色模式动画调整 */
@media (prefers-color-scheme: dark) {
    .gradient-bg {
        background: linear-gradient(-45deg, #2c3e50, #34495e, #3498db, #e74c3c);
        background-size: 400% 400%;
    }
}