:root {
    --primary: #6c5ce7;
    --secondary: #00cec9;
    --accent: #fd79a8;
    --light: #f8f9fa;
    --dark: #2d3436;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #ff7675;
    --gray: #dfe6e9;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf9 100%);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    padding: 16px;
    padding-bottom: 70px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    padding: 20px 0;
    margin-bottom: 15px;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.subtitle {
    color: #7f8c8d;
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.current-date {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-top: 5px;
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 15px;
}

.card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    position: relative;
    height: 100%;
    animation: fadeIn 0.5s ease-out forwards;
    will-change: transform;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}

.card-header {
    padding: 18px 20px 12px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    position: relative;
}

.card-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
}

.card-title i {
    margin-right: 10px;
    font-size: 1.4rem;
}

.birth-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    opacity: 0.9;
}

.zodiac-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-top: 3px;
    opacity: 0.9;
}

.card-body {
    padding: 20px;
}

.countdown {
    text-align: center;
    margin: 15px 0;
    padding: 12px;
    background: rgba(108, 92, 231, 0.08);
    border-radius: 12px;
    height: 80px; /* 固定高度确保一致性 */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.countdown-number {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin: 5px 0;
}

.countdown-label {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 600;
}

.next-birthday {
    display: flex;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px dashed var(--gray);
}

.next-birthday i {
    color: var(--secondary);
    margin-right: 10px;
    font-size: 1.1rem;
}

.birthday-week {
    display: flex;
    align-items: center;
    margin-top: 8px;
    color: var(--primary);
    font-weight: 500;
}

.birthday-week i {
    margin-right: 8px;
    font-size: 1rem;
}

.birthday-cake {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.8rem;
    opacity: 0.3;
}

.lunar-badge {
    background: var(--warning);
    color: #2d3436;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-block;
    margin-left: 8px;
}

.footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-top: 10px;
}

/* 响应式调整 */
@media (max-width: 600px) {
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 1.6rem;
    }
    
    .card {
        border-radius: 16px;
    }
    
    .countdown-number {
        font-size: 1.8rem;
    }
}

@media (max-width: 400px) {
    body {
        padding: 12px;
        padding-bottom: 60px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .countdown {
        padding: 10px;
    }
    
    .countdown-number {
        font-size: 1.6rem;
    }
    
    .next-birthday, .birthday-week {
        font-size: 0.95rem;
    }
}

/* 加载状态 */
.loading-container {
    text-align: center;
    padding: 40px 0;
}

.spinner {
    border: 4px solid rgba(108, 92, 231, 0.2);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

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

/* 添加动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 生日当天特殊样式 */
.birthday-today {
    animation: pulse 2s infinite;
}

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

/* 优化动画性能 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 为生日当天添加闪烁效果 */
@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.birthday-today .countdown-number {
    color: #e84393;
    animation: blink 1s infinite;
}

/* 生日当天全屏弹窗样式 */
.birthday-modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.5s ease-out;
}

.birthday-modal-content {
    background: linear-gradient(135deg, #6c5ce7, #00cec9);
    margin: 5% auto;
    padding: 30px;
    border-radius: 20px;
    width: 80%;
    max-width: 500px;
    text-align: center;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: modalAppear 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalAppear {
    0% {
        transform: scale(0.5) translateY(-50px);
        opacity: 0;
    }
    100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.birthday-modal-header h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.birthday-person-icon i {
    font-size: 4rem;
    margin: 20px 0;
    display: block;
}

.birthday-modal-body h3 {
    font-size: 2rem;
    margin: 15px 0;
}

.birthday-age {
    font-size: 1.5rem;
    margin: 10px 0;
    font-weight: bold;
}

.birthday-wish {
    font-size: 1.1rem;
    margin: 20px 0;
    line-height: 1.6;
}

.birthday-modal-close {
    color: #fff;
    float: right;
    font-size: 2rem;
    font-weight: bold;
    position: absolute;
    top: 15px;
    right: 20px;
    cursor: pointer;
    transition: transform 0.3s;
}

.birthday-modal-close:hover,
.birthday-modal-close:focus {
    transform: scale(1.2);
    text-decoration: none;
}

/* 庆祝动画 */
.birthday-animation {
    display: flex;
    justify-content: space-around;
    margin-top: 30px;
}

.balloon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
    will-change: transform;
}

.balloon:nth-child(2) {
    animation-delay: 0.4s;
}

.balloon:nth-child(3) {
    animation-delay: 0.8s;
}

.balloon:nth-child(4) {
    animation-delay: 1.2s;
}

@keyframes float {
    0% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
    100% {
        transform: translateY(0) rotate(-10deg);
    }
}

/* 响应式调整 */
@media (max-width: 600px) {
    .birthday-modal-content {
        width: 90%;
        padding: 20px;
        margin: 10% auto;
    }
    
    .birthday-modal-header h2 {
        font-size: 2rem;
    }
    
    .birthday-person-icon i {
        font-size: 3rem;
    }
    
    .birthday-modal-body h3 {
        font-size: 1.7rem;
    }
    
    .birthday-age {
        font-size: 1.3rem;
    }
}