/* 基础样式 */
:root {
    --primary-color: #a3d5ff;
    --secondary-color: #d6ebff;
    --glass-color: rgba(255, 255, 255, 0.2);
    --glass-dark: rgba(255, 255, 255, 0.1);
    --text-color: #333;
    --text-light: #666;
    --accent-color: #4d94ff;
    --accent-hover: #3366cc;
    --success-color: #4CAF50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    --border-radius: 16px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
    line-height: 1.6;
}

/* 毛玻璃效果 */
.glass {
    background: var(--glass-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
}

/* 覆盖：登录模态框去掉毛玻璃，改为接近网站主题的不透明样式 */
#login-modal .modal-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    color: var(--text-color);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* 导航栏 */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    margin-bottom: 30px;
    position: relative;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.8rem;
    color: var(--accent-color);
    text-decoration: none;
}

    .logo i {
        margin-right: 10px;
        font-size: 2rem;
    }

.nav-links {
    display: flex;
    list-style: none;
    gap: 10px;
}

    .nav-links li {
        display: inline-block;
    }

    .nav-links a {
        text-decoration: none;
        color: var(--text-color);
        font-weight: 500;
        padding: 10px 20px;
        border-radius: 50px;
        transition: var(--transition);
        display: block;
        white-space: nowrap;
    }

        .nav-links a:hover, .nav-links a.active {
            background-color: rgba(255, 255, 255, 0.3);
            color: var(--accent-color);
        }

.user-status {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    position: relative;
}

#username-display {
    font-weight: 500;
    color: var(--accent-color);
}

/* 状态按钮与选择器 */
.status-btn {
    background: transparent;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: var(--transition);
}

    .status-btn:hover {
        background: rgba(0,0,0,0.04);
    }

.status-picker {
    position: absolute;
    top: 44px;
    left: -80px;
    background: white;
    border-radius: 10px;
    padding: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    width: 190px;
    z-index: 300;
}

    .status-picker button {
        background: transparent;
        border: none;
        font-size: 1.1rem;
        padding: 8px;
        cursor: pointer;
        border-radius: 8px;
    }

        .status-picker button:hover {
            background: rgba(0,0,0,0.05);
        }

.login-btn, .logout-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.login-btn {
    background-color: var(--accent-color);
    color: white;
}

.logout-btn {
    background-color: var(--glass-dark);
    color: var(--text-color);
}

    .login-btn:hover, .logout-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }


/* 主内容区 */
.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    max-width: 1400px;
    margin: 0 auto;
}

.card {
    padding: 25px;
    min-height: 300px;
    transition: var(--transition);
    display: none;
}

    .card.active {
        display: block;
    }

h2 {
    margin-bottom: 20px;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    font-size: 1.5rem;
}

    h2 i {
        margin-right: 10px;
    }

h3 {
    margin: 15px 0;
    color: var(--text-color);
    font-size: 1.2rem;
}

/* 主页内容 */
.welcome-content {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
    margin-bottom: 30px;
}

.welcome-text {
    flex: 1;
    min-width: 300px;
}

    .welcome-text ul {
        list-style: none;
        margin: 20px 0;
    }

    .welcome-text li {
        margin-bottom: 10px;
        padding-left: 30px;
        position: relative;
    }

        .welcome-text li i {
            position: absolute;
            left: 0;
            top: 5px;
            color: var(--accent-color);
        }

.highlight {
    font-size: 1.2rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-top: 20px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    display: inline-block;
}

.welcome-image {
    flex: 0 0 150px;
    text-align: center;
    color: var(--accent-color);
}

.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.stat-card {
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

    .stat-card:hover {
        transform: translateY(-5px);
    }

    .stat-card i {
        font-size: 2.5rem;
        color: var(--accent-color);
        margin-bottom: 10px;
    }

    .stat-card h3 {
        font-size: 1rem;
        color: var(--text-light);
        margin: 10px 0;
    }

    .stat-card p {
        font-size: 2rem;
        font-weight: 700;
        color: var(--accent-color);
    }

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: 20px;
}

.modal-content {
    max-width: 500px;
    width: 100%;
    padding: 30px;
    position: relative;
    animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 1.8rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-color);
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

    .close-modal:hover {
        background-color: rgba(0, 0, 0, 0.1);
    }

.small-btn {
    padding: 6px 10px;
    font-size: 0.9rem;
    width: auto;
}

/* 标签 */
.tab-container {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.tab {
    padding: 12px 25px;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    font-weight: 500;
    border: none;
    color: var(--text-color);
    flex: 1;
    text-align: center;
}

    .tab.active {
        background: rgba(255, 255, 255, 0.3);
        color: var(--accent-color);
        border-bottom: 2px solid var(--accent-color);
    }

.tab-content {
    display: none;
}

    .tab-content.active {
        display: block;
    }

/* 表单 */
.form-group {
    margin-bottom: 20px;
}

    .form-group label {
        display: block;
        margin-bottom: 8px;
        color: var(--text-color);
        font-weight: 500;
    }

        .form-group label i {
            margin-right: 8px;
            color: var(--accent-color);
        }

input, textarea, select {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.7);
    color: var(--text-color);
    transition: var(--transition);
    border: 1px solid transparent;
}

    input:focus, textarea:focus, select:focus {
        outline: none;
        border-color: var(--accent-color);
        box-shadow: 0 0 0 3px rgba(77, 148, 255, 0.2);
    }

textarea {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

/* 按钮 */
button {
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    padding: 15px 25px;
    border-radius: 12px;
    font-size: 1rem;
    width: 100%;
}

    .btn-primary:hover {
        background-color: var(--accent-hover);
        transform: translateY(-2px);
    }

.btn-secondary {
    background-color: var(--glass-dark);
    color: var(--text-color);
    padding: 15px 25px;
    border-radius: 12px;
    font-size: 1rem;
    width: 100%;
}

    .btn-secondary:hover {
        background-color: rgba(255, 255, 255, 0.3);
        transform: translateY(-2px);
    }

.btn-celebrate {
    background: linear-gradient(45deg, #FF5252, #FF4081, #E040FB);
    color: white;
    padding: 15px 30px;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 20px;
    animation: pulse 2s infinite;
}

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

    50% {
        transform: scale(1.05);
    }

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

/* 日历 */
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 0 10px;
}

    .calendar-controls button {
        background: rgba(255, 255, 255, 0.3);
        border: none;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: var(--accent-color);
        font-size: 1.2rem;
    }

        .calendar-controls button:hover {
            background: rgba(255, 255, 255, 0.5);
        }

#current-month-year {
    font-size: 1.3rem;
    color: var(--accent-color);
}

.calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-bottom: 30px;
}

.calendar-header {
    text-align: center;
    font-weight: 600;
    padding: 10px 0;
    color: var(--accent-color);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.calendar-day {
    padding: 12px 5px;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

    .calendar-day:hover {
        background-color: rgba(255, 255, 255, 0.4);
    }

    .calendar-day.today {
        background-color: rgba(77, 148, 255, 0.2);
        font-weight: bold;
        color: var(--accent-color);
    }

    .calendar-day.birthday {
        color: #ff1493;
        font-weight: bold;
    }

/* 生日便利贴（右上角，倾斜） */
.birthday-sticky {
    position: absolute;
    top: 6px;
    right: 6px;
    transform: rotate(-30deg);
    transform-origin: right top;
    background: #ff1493;
    color: white;
    font-size: 10px;
    padding: 4px 8px;
    border-radius: 4px;
    max-width: 70px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.calendar-day.other-month {
    color: #aaa;
    opacity: 0.5;
}

/* 生日列表 */
.birthday-list-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
}

.birthday-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.birthday-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
}

.birthday-info h4 {
    margin-bottom: 5px;
    color: var(--accent-color);
}

.birthday-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.days-until {
    background: var(--accent-color);
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* 公告栏容器 */
.announcement-container {
    min-height: 200px;
    max-height: none; /* 移除最大高度限制 */
    overflow: visible; /* 移除滚动条 */
}

.announcement-content {
    min-height: 200px;
    overflow-y: auto;
    padding-right: 10px;
    margin-bottom: 20px;
    line-height: 1.8;
    white-space: pre-line; /* 修复：保持换行显示 */
}

.edit-announcement {
    margin-top: 20px;
}

/* 讨论区卡片 - 增加高度 */
.discussion-card {
    min-height: 600px; /* 增加最小高度 */
    grid-column: span 2; /* 占据两列宽度 */
}

/* 日期选择器样式 */
.date-picker-container {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
}

.filter-header {
    margin-bottom: 15px;
    text-align: center;
}

    .filter-header h4 {
        color: var(--accent-color);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }

.date-picker-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding: 0 10px;
}

    .date-picker-controls button {
        background: rgba(255, 255, 255, 0.3);
        border: none;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: var(--accent-color);
        font-size: 1.2rem;
    }

        .date-picker-controls button:hover {
            background: rgba(255, 255, 255, 0.5);
        }

    .date-picker-controls h5 {
        font-size: 1.2rem;
        color: var(--accent-color);
        font-weight: 600;
    }

.date-picker {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    margin-bottom: 15px;
}

.date-picker-header {
    text-align: center;
    font-weight: 600;
    padding: 8px 0;
    color: var(--accent-color);
    font-size: 0.9rem;
}

.date-picker-day {
    padding: 10px 5px;
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    min-height: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

    .date-picker-day:hover {
        background-color: rgba(255, 255, 255, 0.3);
    }

    .date-picker-day.today {
        border: 1px solid var(--accent-color);
        font-weight: bold;
    }

    .date-picker-day.has-messages {
        background-color: rgba(77, 148, 255, 0.3);
        color: var(--accent-color);
        font-weight: 600;
    }

    .date-picker-day.selected {
        background-color: var(--accent-color);
        color: white;
    }

    .date-picker-day.no-messages {
        color: #aaa;
        opacity: 0.5;
    }

    .date-picker-day.other-month {
        color: #ccc;
        opacity: 0.3;
    }

.date-picker-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

    .date-picker-actions button {
        padding: 10px 20px;
        font-size: 0.9rem;
        flex: 1;
        max-width: 150px;
    }

/* 消息列表容器 */
.message-list-container {
    height: 400px; /* 增加高度 */
    overflow-y: auto;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.15); /* 增加背景深度 */
    border-radius: 12px;
    padding: 15px;
}

/* 日期分组标题 */
.date-group {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(77, 148, 255, 0.3);
}

.date-group-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

    .date-group-title i {
        margin-right: 8px;
    }

/* 消息样式增强 */
.message {
    background: rgba(255, 255, 255, 0.7); /* 增加不透明度 */
    padding: 15px;
    border-radius: 12px;
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    animation: messageFadeIn 0.3s ease;
    border-left: 4px solid var(--accent-color);
}

    .message.admin {
        border-left-color: #ff4081;
        background: rgba(255, 64, 129, 0.1);
    }

    .message.current-user {
        border-left-color: #4CAF50;
        background: rgba(76, 175, 80, 0.1);
    }

@keyframes messageFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 8px;
    padding-bottom: 5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.message-sender {
    font-weight: 600;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 5px;
}

    .message-sender.admin-badge {
        color: #ff4081;
    }

    .message-sender.current-user-badge {
        color: #4CAF50;
    }

.message-time {
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 8px;
    border-radius: 10px;
}

.message-body {
    line-height: 1.6;
    padding: 5px 0;
    font-size: 1rem;
}

.message-input {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 朋友管理 */
.friends-controls {
    margin-bottom: 20px;
}

.friends-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.friend-card {
    padding: 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    transition: var(--transition);
}

    .friend-card:hover {
        background: rgba(255, 255, 255, 0.3);
        transform: translateY(-2px);
    }

.friend-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 5px;
}

.friend-birthday {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.friend-notes {
    font-size: 0.9rem;
    color: var(--text-color);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    white-space: pre-line; /* 修复：保持换行显示 */
}

.friend-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

    .friend-actions button {
        padding: 5px 10px;
        font-size: 0.8rem;
        border-radius: 6px;
        flex: 1;
    }

.add-friend-form {
    margin-top: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
}

.form-buttons {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

/* 生日弹窗 */
.birthday-modal-content {
    text-align: center;
    padding: 20px;
}

    .birthday-modal-content i {
        color: #ff4081;
        margin-bottom: 20px;
        animation: bounce 1s infinite;
    }

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

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

#birthday-person {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
    margin: 10px 0;
}

/* 页脚 */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 烟花效果 */
.firework {
    position: absolute;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 1000;
}

/* 折叠控制：当容器有 collapsed 类时隐藏日历主体区域 */
.date-picker-container.collapsed .date-picker,
.date-picker-container.collapsed .date-picker-actions,
.date-picker-container.collapsed .date-picker-controls h5 {
    display: none;
}

/* 消息内显示 emoji 状态 */
.user-emoji {
    margin-right: 6px;
    font-size: 1.1rem;
}

/* 保留之前的工具类 */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}