/* iOS 17+ 设计系统 - 横向时间线布局 */

:root {
    /* iOS 颜色系统 */
    --ios-blue: #007AFF;
    --ios-green: #34C759;
    --ios-red: #FF3B30;
    --ios-orange: #FF9500;
    --ios-yellow: #FFCC00;

    --bg-primary: #F2F2F7;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F9F9F9;

    --text-primary: #000000;
    --text-secondary: #8E8E93;
    --text-tertiary: #C7C7CC;

    --separator: rgba(60, 60, 67, 0.12);

    /* iOS 17 圆角系统 */
    --radius-small: 8px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --radius-xlarge: 20px;

    /* iOS 阴影 */
    --shadow-1: 0 0.5px 2px rgba(0, 0, 0, 0.04);
    --shadow-2: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-3: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-4: 0 8px 24px rgba(0, 0, 0, 0.10);

    /* iOS 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* iOS 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--separator);
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px var(--spacing-lg);
    min-height: 52px;
}

.nav-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

/* iOS 撰写按钮 */
.compose-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--ios-blue);
    border-radius: 50%;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

.compose-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.4);
}

.compose-btn:active {
    transform: scale(0.95);
}

/* 导航栏按钮组 */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.icon-btn-nav {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    color: var(--ios-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn-nav:hover {
    background: rgba(0, 122, 255, 0.1);
}

.icon-btn-nav:active {
    transform: scale(0.95);
}

/* 主容器 */
.main-container {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* 横向时间线布局 */
.timeline-wrapper {
    position: relative;
}

/* 横向时间线 - 隐藏 */
.timeline-horizontal {
    display: none;
}

/* 笔记流布局 - 横向排列自动换行 */
.notes-flow {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg) 24px;
    align-items: flex-start;
    padding-top: 32px;
}

/* 笔记卡片 */
.note-card {
    position: relative;
    width: 206px;
    flex-shrink: 0;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
    padding-top: 8px;
}

.note-card.has-image {
    width: 206px;
}

/* 收藏的卡片样式 */
.note-card.is-favorite {
    background: rgba(255, 204, 0, 0.03);
    border-radius: var(--radius-medium);
    padding: 4px;
}

.note-card.is-favorite .card-inner {
    box-shadow: 0 0 0 1px rgba(255, 204, 0, 0.3);
}

/* 皇冠收藏按钮 */
.favorite-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    color: var(--text-tertiary);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-1);
}

.favorite-btn:hover {
    transform: scale(1.1);
}

.favorite-btn:hover svg {
    color: var(--ios-yellow);
}

.favorite-btn.active svg {
    color: var(--ios-yellow);
    filter: drop-shadow(0 0 2px rgba(255, 204, 0, 0.5));
}

.note-card:hover {
    transform: translateY(-4px);
}

.note-card:active {
    transform: scale(0.98);
}

/* 每个卡片的横线 */
.note-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -12px;
    right: -12px;
    height: 2px;
    background: var(--separator);
    z-index: 0;
}

/* 时间点 */
.note-dot {
    position: absolute;
    top: -5px;
    left: 20px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ios-blue);
    border: 2px solid var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
    z-index: 2;
    transition: all 0.2s ease;
}

/* 收藏的时间点 */
.note-card.is-favorite .note-dot {
    background: var(--ios-yellow);
    box-shadow: 0 0 0 4px rgba(255, 204, 0, 0.15);
}

.note-card:hover .note-dot {
    box-shadow: 0 0 0 6px rgba(0, 122, 255, 0.25);
}

.note-card.is-favorite:hover .note-dot {
    box-shadow: 0 0 0 6px rgba(255, 204, 0, 0.25);
}

/* 卡片内容 */
.card-inner {
    background: var(--bg-secondary);
    border-radius: var(--radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-1);
    border: 0.5px solid var(--separator);
    transition: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
    position: relative;
}

.note-card:hover .card-inner {
    box-shadow: var(--shadow-3);
}

.card-header {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-xs);
}

.card-time {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-text {
    font-size: 14px;
    line-height: 1.4;
    color: var(--text-primary);
    padding: 0 var(--spacing-md) var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-image {
    width: 100%;
    max-height: 120px;
    object-fit: contain;
    background: var(--bg-tertiary);
    padding: var(--spacing-sm) 0;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 var(--spacing-md) var(--spacing-sm);
}

.card-tag {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

/* 彩虹文字效果 */
.rainbow-text {
    background: linear-gradient(90deg, #FF0000, #FF7F00, #FFFF00, #00FF00, #0000FF, #4B0082, #9400D3, #FF0000);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
    animation: rainbow-flow 3s linear infinite;
}

@keyframes rainbow-flow {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px var(--spacing-md);
    background: var(--bg-tertiary);
    border-top: 0.5px solid var(--separator);
}

.card-date {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 500;
}

.chevron {
    color: var(--text-tertiary);
    transition: transform 0.2s ease;
}

.note-card:hover .chevron {
    transform: translateX(2px);
}

/* 空状态 */
.empty-state {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 100px 20px;
    text-align: center;
}

.empty-icon {
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* 模态弹窗 - 屏幕中间显示 */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-enter-active, .modal-leave-active {
    transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.modal-enter-from, .modal-leave-to {
    opacity: 0;
}

.modal-enter-from .compose-modal, .modal-leave-to .compose-modal,
.modal-enter-from .detail-modal, .modal-leave-to .detail-modal {
    transform: scale(0.9);
    opacity: 0;
}

.modal-enter-to .compose-modal, .modal-leave-to .compose-modal,
.modal-enter-to .detail-modal, .modal-leave-to .detail-modal {
    transform: scale(1);
    opacity: 1;
}

/* 撰写弹窗 - 居中显示 */
.compose-modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-xlarge);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-4);
}

.compose-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 0.5px solid var(--separator);
    background: var(--bg-tertiary);
}

.header-btn {
    border: none;
    background: none;
    font-size: 17px;
    font-weight: 600;
    color: var(--ios-blue);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    transition: opacity 0.15s ease;
}

.header-btn:hover {
    opacity: 0.7;
}

.header-btn-primary {
    opacity: 1;
}

.header-btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.compose-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
}

.compose-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

/* 默认标签选择区 */
.default-tags-section {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.default-tag-chip {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    background: rgba(0, 122, 255, 0.1);
    color: var(--ios-blue);
    user-select: none;
    position: relative;
}

.default-tag-chip:hover {
    transform: scale(1.05);
}

.default-tag-chip.selected {
    background: var(--tag-color);
    color: white;
    box-shadow: 0 2px 8px var(--tag-color);
}

.compose-textarea {
    width: 100%;
    border: none;
    background: transparent;
    font-size: 17px;
    font-family: inherit;
    resize: none;
    outline: none;
    line-height: 1.5;
    color: var(--text-primary);
}

.compose-textarea::placeholder {
    color: var(--text-tertiary);
}

.char-counter {
    text-align: right;
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
    font-weight: 500;
}

.char-counter .over-limit {
    color: var(--ios-red);
}

.images-attachment {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.image-preview-item {
    position: relative;
    display: inline-block;
}

.image-preview-item img {
    max-width: 150px;
    max-height: 150px;
    border-radius: var(--radius-medium);
    object-fit: contain;
}

.remove-attachment {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 50%;
    box-shadow: var(--shadow-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.15s ease;
    font-size: 16px;
}

.remove-attachment:hover {
    background: var(--ios-red);
    color: white;
}

.tags-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-medium);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
}

.tag-remove {
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    opacity: 0.7;
    transition: opacity 0.15s ease;
}

.tag-remove:hover {
    opacity: 1;
}

.tag-input-field {
    width: 100%;
    border: none;
    background: transparent;
    font-size: 16px;
    font-family: inherit;
    outline: none;
    padding: var(--spacing-sm) 0;
    color: var(--text-primary);
}

.tag-input-field::placeholder {
    color: var(--text-tertiary);
}

.compose-toolbar {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 0.5px solid var(--separator);
    background: var(--bg-tertiary);
}

.toolbar-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--radius-medium);
    color: var(--ios-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s ease;
}

.toolbar-btn:hover {
    background: rgba(0, 122, 255, 0.1);
}

.hidden-input {
    display: none;
}

/* 详情弹窗 - 居中显示 */
.detail-modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-xlarge);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-4);
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 0.5px solid var(--separator);
    background: var(--bg-tertiary);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--radius-medium);
    color: var(--ios-red);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s ease;
}

.icon-btn:hover {
    background: rgba(255, 59, 48, 0.1);
}

.detail-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.detail-text {
    font-size: 17px;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    margin-bottom: var(--spacing-lg);
}

.detail-images {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.detail-image {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
    border-radius: var(--radius-large);
    background: var(--bg-tertiary);
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.detail-tags-edit {
    margin-bottom: var(--spacing-lg);
}

.detail-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.detail-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
}

.detail-tag-remove {
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    opacity: 0.7;
    transition: opacity 0.15s ease;
}

.detail-tag-remove:hover {
    opacity: 1;
}

.detail-tag-input {
    width: 100%;
    border: none;
    background: var(--bg-tertiary);
    font-size: 16px;
    font-family: inherit;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-medium);
    outline: none;
    color: var(--text-primary);
}

.detail-tag-input::placeholder {
    color: var(--text-tertiary);
}

.detail-meta {
    padding-top: var(--spacing-md);
    border-top: 0.5px solid var(--separator);
}

.detail-date {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

/* 响应式 */
@media (max-width: 600px) {
    .main-container {
        padding: var(--spacing-md);
    }

    .note-card {
        width: 160px;
    }

    .note-card.has-image {
        width: 160px;
    }
}

/* 筛选弹窗 */
.filter-modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-xlarge);
    width: 100%;
    max-width: 400px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-4);
}

.filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 0.5px solid var(--separator);
    background: var(--bg-tertiary);
}

.filter-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
}

.filter-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.filter-section {
    margin-bottom: var(--spacing-xl);
}

.filter-section:last-child {
    margin-bottom: 0;
}

.filter-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

/* 筛选选项 */
.filter-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-option:hover {
    background: rgba(0, 122, 255, 0.05);
}

.filter-option.active {
    background: rgba(0, 122, 255, 0.1);
}

.filter-option-text {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
}

.filter-check {
    width: 20px;
    height: 20px;
    background: var(--ios-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 筛选标签 */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.filter-tag {
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.filter-tag:hover {
    transform: scale(1.05);
}

.filter-tag.selected {
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.filter-empty {
    font-size: 15px;
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin: 0;
}