/* --- 全局与字体 --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

:root {
    --primary-color: #ff8a80; /* 温柔的珊瑚粉 */
    --secondary-color: #ea80fc; /* 柔和的兰花紫 */
    --background-color: #f0f2f5; /* 淡雅的背景灰 */
    --text-color: #333;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --white-color: #fff;
    --button-hover-bg: #f1f1f1;
    --delete-mode-bg: rgba(255, 0, 0, 0.1);
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background 0.5s ease;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

/* --- 加载与密码 --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
}

.modal-content {
    background-color: var(--white-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 5px 20px var(--shadow-color);
    text-align: center;
    width: 90%;
    max-width: 350px;
}

.modal-content h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.modal-content input, .modal-content select {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.modal-content button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--white-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    transition: transform 0.2s, box-shadow 0.2s;
}

.modal-content button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

#password-error {
    color: red;
    margin-top: -10px;
    margin-bottom: 15px;
    height: 1em;
}

.password-hint {
    font-size: 0.85rem;
    color: #888;
    margin-top: -10px;
    margin-bottom: 15px;
}

/* --- 头部与控制栏 --- */
.header {
    background-color: rgba(255, 255, 255, 0.5);
    /* backdrop-filter: blur(10px); */ /* 移除复杂的毛玻璃效果，以确保兼容性和稳定性 */
    padding: 15px 30px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.title-container {
    grid-column: 2;
    text-align: center;
}

.header h1 {
    font-size: 2.2rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 5px;
}

.subtitle {
    font-size: 1rem;
    color: #666;
}

.controls {
    grid-column: 3;
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 20px;
}

.control-btn, .icon-btn {
    background-color: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 8px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.3s, box-shadow 0.3s;
    font-size: 0.9rem;
}

.control-btn:hover, .icon-btn:hover {
    background-color: var(--button-hover-bg);
    box-shadow: 0 2px 5px var(--shadow-color);
}

.icon-btn {
    padding: 8px;
    border-radius: 50%;
}

.icon-btn .material-icons {
    font-size: 22px;
    color: var(--primary-color);
}

/* --- 布局控制 --- */
#layout-controls-container {
    padding: 15px 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

#main-content {
    background-color: rgba(255, 255, 255, 0.5);
}

.layout-buttons {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--white-color);
    padding: 8px;
    border-radius: 50px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.layout-buttons > span {
    font-weight: bold;
    margin-right: 10px;
    margin-left: 10px;
    color: var(--primary-color);
}

.layout-btn {
    background-color: transparent;
    border: none;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.layout-btn.active {
    background-color: var(--primary-color);
}

.layout-btn.active .material-icons {
    color: var(--white-color);
}

/* --- 照片墙 --- */
.photo-wall {
    display: grid;
    gap: 20px;
    padding: 30px;
}

.photo-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.photo-item:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.photo-item img, .photo-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    cursor: pointer;
}

/* --- 边框样式 --- */
.photo-wall.border-default .photo-item {
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
    border: none;
    padding: 0;
    background-color: transparent;
}

.photo-wall.border-polaroid .photo-item {
    background-color: var(--white-color);
    border: 1px solid #eee;
    padding: 10px 10px 20px 10px;
    box-shadow: 0 5px 15px var(--shadow-color);
    border-radius: 2px;
}

.photo-wall.border-shadow .photo-item {
    border-radius: 8px;
    border: 3px solid var(--white-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.photo-wall.border-rounded .photo-item {
    border-radius: 50%;
    box-shadow: 0 5px 15px var(--shadow-color);
}

.photo-wall.border-none .photo-item {
    border: none;
    box-shadow: none;
    border-radius: 0;
}

/* --- 心形布局样式 --- */
.photo-wall.heart {
    display: grid;
    /* 创建一个 12x12 的网格来容纳新的布局 */
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(12, 5vw); /* 使用 vw 单位保持宽高比 */
    gap: 10px;
    padding: 20px;
    max-width: 1200px;
    margin: 20px auto;
    height: auto;
}

.photo-item.placeholder {
    background-color: #fff0f0; /* 浅粉色 */
    border-radius: 12px;
    border: 2px dashed var(--primary-color);
    box-shadow: none;
    pointer-events: none;
}

/* --- 布局样式 --- */
.photo-wall.grid-3 { grid-template-columns: repeat(auto-fill, minmax(calc(33.33% - 20px), 1fr)); }
.photo-wall.grid-4 { grid-template-columns: repeat(auto-fill, minmax(calc(25% - 20px), 1fr)); }
.photo-wall.grid-5 { grid-template-columns: repeat(auto-fill, minmax(calc(20% - 20px), 1fr)); }

/* --- 灯箱 --- */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1001;
}

#lightbox-img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: 10px;
}

.close-lightbox {
    position: absolute;
    top: 20px;
    right: 30px;
    color: var(--white-color);
    font-size: 40px;
    cursor: pointer;
}

/* --- 设置面板 --- */
#settings-panel {
    position: fixed;
    top: 0;
    right: -350px; /* Start off-screen */
    width: 320px;
    height: 100%;
    background-color: rgba(240, 242, 245, 0.85); /* 使用一个更稳定、带有alpha通道的背景色 */
    box-shadow: -5px 0 15px var(--shadow-color);
    padding: 60px 20px 20px;
    transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 200;
    overflow-y: auto;
}

#settings-panel.open {
    right: 0;
}

.close-panel-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2rem;
    background: transparent;
    border: none;
    color: var(--text-color);
    padding: 0;
    line-height: 1;
    cursor: pointer;
}

.setting-group {
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-group h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    font-size: 0.9rem;
}

.setting-group select,
.setting-group input[type="text"],
.setting-group input[type="color"] {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
}

#bg-image-setting, #bg-color-setting {
    margin-top: 10px;
}


/* --- 语言选择器优化 --- */
.language-select-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--white-color);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 0 15px 0 10px;
    transition: background-color 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.language-select-wrapper:hover {
    background-color: var(--button-hover-bg);
    box-shadow: 0 2px 5px var(--shadow-color);
}

.language-select-wrapper .material-icons {
    color: var(--primary-color);
    margin-right: 5px;
    font-size: 22px;
}

.language-select-wrapper select {
    -webkit-appearance: none;
    appearance: none;
    background-color: transparent;
    border: none;
    padding: 8px 20px 8px 5px; /* 右侧留出箭头空间 */
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
    font-family: 'Noto Sans SC', sans-serif;
    position: relative;
    z-index: 1;
}

.language-select-wrapper select:focus {
    outline: none;
}

.language-select-wrapper::after {
    content: 'arrow_drop_down';
    font-family: 'Material Icons';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    pointer-events: none; /* 确保点击可以穿透到 select */
    z-index: 0;
}


/* --- 删除模式样式 --- */
.photo-wall.delete-mode .photo-item {
    cursor: pointer;
}

#background-music {
    display: none !important; /* 强制隐藏音频播放器 */
}

.photo-wall.delete-mode .photo-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.5);
    transition: background-color 0.3s;
}

.photo-wall.delete-mode .photo-item.selected::after {
    background-color: rgba(255, 138, 128, 0.7); /* --primary-color with opacity */
    border: 3px solid var(--primary-color);
}




/* --- 响应式设计 --- */

@media (max-width: 1024px) {
    .header {
        padding: 15px 20px;
    }
    .header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    body {
        overflow-x: hidden; /* 防止水平溢出 */
    }

    .app-content {
        width: 100%; /* 确保应用内容占满全宽 */
    }

    .header {
        display: flex;
        flex-direction: column; /* 垂直堆叠 */
        align-items: center;
        gap: 15px;
        padding: 15px;
    }

    .title-container {
        order: 1; /* 标题第一 */
    }

    .controls {
        order: 2; /* 控件第二 */
        width: 100%;
        justify-content: center;
        flex-wrap: wrap; /* 允许换行 */
        gap: 10px;
    }

    .control-btn span:not(.material-icons) {
        display: none; /* 隐藏按钮文字 */
    }

    .control-btn, .icon-btn {
        padding: 8px;
        border-radius: 50%;
    }
    
    .language-select-wrapper {
        padding: 0;
    }

    .language-select-wrapper .material-icons {
        display: none; /* 隐藏地球图标 */
    }

    /* 在平板尺寸下，让不同网格布局有区别 */
    #photo-wall.grid-5 {
        grid-template-columns: repeat(4, 1fr);
    }
    #photo-wall.grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
    #photo-wall.grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    #settings-panel {
        width: 80vw; /* 使用视口宽度 */
        max-width: 320px;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.6rem;
    }
    .subtitle {
        font-size: 0.85rem;
    }

    /* 在小手机上，所有网格布局统一为2列以保证可读性 */
    #photo-wall.grid-3,
    #photo-wall.grid-4,
    #photo-wall.grid-5 {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    #settings-panel {
        width: 100%;
        max-width: 100%;
        right: -100%;
        border-radius: 0;
    }
    #settings-panel.open {
        right: 0;
    }

    .modal-content {
        width: 90%;
        padding: 20px 15px;
    }
}