/* 引入独特字体 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Playfair+Display:wght@400;700&display=swap');

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量定义 - 严格遵循SKILL.md设计原则 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --past-color: #2c3e50;
    --present-color: #3498db;
    --future-color: #ecf0f1;
    --bg-gradient: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 50%, #16213e 100%);
    --text-primary: #ecf0f1;
    --text-secondary: #bdc3c7;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s ease;
    --grid-gap: 2px;
    --grid-padding: 1rem;
}

/* 基础样式 */
body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 2rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 头部样式 */
header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--secondary-color), #9b59b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 300;
}

/* 介绍部分样式 */
.intro {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.intro p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* 输入区域样式 */
.input-section {
    text-align: center;
    margin-bottom: 3rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.input-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

#birthday-form {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

#birthday {
    padding: 0.8rem 1rem;
    font-size: 1rem;
    border: 2px solid rgba(52, 152, 219, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transition: var(--transition);
}

#birthday:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

button {
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    color: white;
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

button:active {
    transform: translateY(0);
}

/* 网格区域样式 */
.grid-section {
    margin-bottom: 3rem;
    text-align: center;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(30, 1fr);
    grid-template-rows: repeat(30, 1fr);
    gap: var(--grid-gap);
    width: 80vw;
    height: 80vw;
    max-width: 80vh;
    max-height: 80vh;
    margin: 0 auto 2rem;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--grid-padding);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.grid-cell {
    background-color: var(--future-color);
    border-radius: 3px;
    transition: var(--transition);
    cursor: pointer;
    opacity: 0.8;
}

.grid-cell:hover {
    transform: scale(1.1);
    opacity: 1;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.grid-cell.past {
    background-color: var(--past-color);
    opacity: 0.9;
}

.grid-cell.present {
    background-color: #3498db; /* 确保是发光的蓝色 */
    animation: pulse 2s ease-in-out infinite;
    opacity: 1;
}

/* 增强的脉冲动画，确保当前时间格子明显发光 */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 10px rgba(52, 152, 219, 0.7), 0 0 20px rgba(52, 152, 219, 0.5);
    }
    50% {
        transform: scale(1.15);
        box-shadow: 0 0 20px rgba(52, 152, 219, 1), 0 0 40px rgba(52, 152, 219, 0.8), 0 0 60px rgba(52, 152, 219, 0.5);
    }
}

/* 全屏模式样式 */
body.fullscreen {
    overflow: hidden;
    background: var(--bg-gradient);
}

body.fullscreen .container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 0;
}

body.fullscreen header,
body.fullscreen .intro,
body.fullscreen .input-section,
body.fullscreen .reflection {
    display: none;
}

body.fullscreen .grid-section {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0;
}

body.fullscreen .grid-container {
    width: 80vw;
    height: 80vw;
    max-width: 80vh;
    max-height: 80vh;
    margin: 0;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
}

body.fullscreen .legend {
    margin-top: 2rem;
    position: relative;
    z-index: 10;
}

/* 返回按钮样式 */
.back-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 1000;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* 图例样式 */
.legend {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: inline-block;
}

.legend-color.past {
    background-color: var(--past-color);
}

.legend-color.present {
    background-color: var(--present-color);
    animation: pulse 2s ease-in-out infinite;
}

.legend-color.future {
    background-color: var(--future-color);
}

/* 感悟部分样式 */
.reflection {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
}

.reflection h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.reflection p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    
    .grid-container {
        max-width: 400px;
        gap: 1px;
        padding: 0.5rem;
    }
    
    #birthday-form {
        flex-direction: column;
    }
    
    #birthday,
    button {
        width: 100%;
        max-width: 300px;
    }
    
    .legend {
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .grid-container {
        max-width: 300px;
    }
    
    .input-section,
    .reflection {
        padding: 1.5rem;
    }
}