/* 1. 全局和字体设置 */
:root {
    --color-bg-dark: #1e1e2c; /* 深夜蓝/墨黑 */
    --color-text-light: #e8e8e8; /* 奶油白 */
    --color-accent-gold: #cfa864; /* 柔和金色 */
    --color-card-bg: #2b2b3e; /* 略浅的卡片背景 */
    --color-card-shadow: rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Lora', 'Playfair Display', serif; 
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--color-accent-gold);
    text-decoration: none;
}

/* 2. 头部导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5vw;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05); 
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    color: var(--color-accent-gold);
    font-weight: 400;
}

.nav-link {
    color: var(--color-text-light);
    text-decoration: none;
    margin-left: 25px;
    opacity: 0.7;
    transition: opacity 0.3s, color 0.3s;
}

.nav-link:hover {
    opacity: 1;
    color: var(--color-accent-gold);
}

/* 3. 主内容区和标题 */
.content-container {
    padding: 40px 5vw;
    text-align: center;
}

.mood-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 50px;
    color: rgba(255, 255, 255, 0.7);
}

/* 4. 留言卡片区 */
.messages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.message-card {
    background-color: var(--color-card-bg);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 20px var(--color-card-shadow); 
    transition: transform 0.3s, box-shadow 0.3s;
    min-height: 180px; 
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    border-left: 5px solid var(--color-accent-gold); 
}

.message-card:hover {
    transform: translateY(-5px); 
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
}

.message-text {
    font-size: 1.05rem;
    font-style: italic; 
    margin-bottom: 15px;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    padding-top: 10px;
    border-top: 1px dashed rgba(255, 255, 255, 0.1); 
}

/* 标签样式 */
.tag {
    padding: 3px 8px;
    border-radius: 3px;
    font-weight: bold;
    font-size: 0.75rem;
    opacity: 0.8;
}
.tag-regret { background-color: #5d4037; } 
.tag-love { background-color: #386a51; } 
.tag-anger { background-color: #7b2424; } 
.tag-hope { background-color: #405d77; }
.tag-memory { background-color: #555577; } 


.meta-info {
    opacity: 0.6;
}

/* 共鸣按钮 */
.resonance-btn {
    background: none;
    border: none;
    color: var(--color-accent-gold);
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.2s, transform 0.2s;
}

.resonance-btn:hover {
    color: #ffd700; 
    transform: scale(1.1);
}

/* 提交页面的样式 */
.form-container {
    max-width: 700px;
    margin: 50px auto;
    padding: 40px;
    background-color: var(--color-card-bg); 
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7); 
    animation: fadeIn 1s ease-out;
}

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

.form-title {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    color: var(--color-text-light);
    margin-bottom: 30px;
    font-weight: 400;
    text-align: center;
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 1rem;
    color: var(--color-accent-gold); 
    font-weight: bold;
}

input[type="text"],
textarea,
select {
    width: 100%;
    padding: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background-color: #1a1a25; 
    color: var(--color-text-light);
    border-radius: 4px;
    font-family: 'Lora', serif; 
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    resize: vertical; 
}

input[type="text"]:focus,
textarea:focus,
select:focus {
    border-color: var(--color-accent-gold);
    box-shadow: 0 0 10px rgba(207, 168, 100, 0.4); 
    outline: none;
}

.message-group textarea {
    min-height: 250px; 
    letter-spacing: 0.05em; 
}

.char-count {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
    margin-top: 5px;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    margin-top: 30px;
    background-color: var(--color-accent-gold);
    color: var(--color-bg-dark); 
    border: none;
    border-radius: 4px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s, opacity 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    background-color: #ffd700; 
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(207, 168, 100, 0.5);
}

/* 无限加载样式 */
#loading-spinner, #end-of-feed {
    text-align: center;
    padding: 30px;
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 20px;
}

#loading-spinner p {
    animation: pulse 1.5s infinite alternate;
}

@keyframes pulse {
    from { opacity: 0.4; }
    to { opacity: 0.8; }
}

#end-of-feed p {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--color-accent-gold);
}