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

:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --hover-bg: #f5f5f5;
    --task-bg: #fafafa;
    --completed-text: #999999;
    --today-border: #4a90e2;
    --dot-planned: #4a90e2;
    --dot-overdue: #e74c3c;
    --dot-completed: #27ae60;
    --input-bg: #ffffff;
    --input-border: #d0d0d0;
    --settings-bg: #ffffff;
    --settings-border: #e0e0e0;
}

body.dark {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --border-color: #333333;
    --hover-bg: #2a2a2a;
    --task-bg: #222222;
    --completed-text: #888888;
    --today-border: #5aa0f2;
    --dot-planned: #5aa0f2;
    --dot-overdue: #f55c5c;
    --dot-completed: #37be70;
    --input-bg: #222222;
    --input-border: #444444;
    --settings-bg: #222222;
    --settings-border: #444444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
    transition: background-color 0.2s, color 0.2s;
}

/* 设置按钮 */
.settings-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    z-index: 1000;
    transition: background-color 0.2s;
}

.settings-btn:hover {
    background-color: var(--hover-bg);
}

/* 设置面板 */
.settings-panel {
    position: fixed;
    top: 70px;
    right: 20px;
    width: 340px;
    min-width: 340px;
    background-color: var(--settings-bg);
    border: 1px solid var(--settings-border);
    border-radius: 8px;
    padding: 20px;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    /* 内容较多时允许内部滚动，避免遮挡底部选项 */
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

/* 设置面板滚动条样式（跟随明暗主题的颜色变量） */
.settings-panel::-webkit-scrollbar {
    width: 8px;
}

.settings-panel::-webkit-scrollbar-track {
    background-color: var(--bg-color);
}

.settings-panel::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

/* Firefox */
.settings-panel {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg-color);
}

.settings-panel.hidden {
    display: none;
}

.settings-content {
    width: 100%;
    min-width: 0;
}

.settings-content h3 {
    margin-bottom: 20px;
    font-size: 18px;
}

.settings-section {
    width: 100%;
    min-width: 0;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h4 {
    margin-bottom: 10px;
    font-size: 14px;
    font-weight: 600;
}

.settings-item {
    width: 100%;
    min-width: 0;
    margin-bottom: 10px;
}

.settings-item label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.settings-item input[type="checkbox"],
.settings-item input[type="radio"] {
    cursor: pointer;
}

/* 垂直布局的标签（用于目标网址等输入） */
.settings-label-stack {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    width: 100%;
    min-width: 0;
}

.settings-label-stack input[type="password"],
.settings-label-stack input[type="url"],
.settings-label-stack input[type="text"] {
    width: 100%;
    min-width: 0;
    max-width: none;
    padding: 6px 8px;
    font-size: 13px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    box-sizing: border-box;
}

.settings-label-stack input[type="password"]:focus,
.settings-label-stack input[type="url"]:focus,
.settings-label-stack input[type="text"]:focus {
    outline: none;
    border-color: var(--today-border);
}

.settings-note {
    margin-top: 4px;
    font-size: 12px;
    color: var(--completed-text);
}

.account-avatar-preview {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    display: block;
}

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

.account-section h4 {
    text-align: left;
}

.account-section .settings-item {
    display: flex;
    justify-content: center;
}

.account-section .settings-item button {
    margin-right: 0;
}

.account-section #account-brief {
    text-align: center;
}

.settings-item button {
    padding: 6px 12px;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 8px;
}

.settings-item button:hover {
    background-color: var(--hover-bg);
}

.donate-content {
    margin-top: 10px;
    text-align: center;
}

.donate-content img {
    max-width: 200px;
    margin: 10px 0;
}

.donate-qr-thumbnail {
    cursor: pointer;
    transition: opacity 0.2s;
}

.donate-qr-thumbnail:hover {
    opacity: 0.8;
}

/* 赞赏码放大模态框 */
.donate-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.donate-modal.hidden {
    display: none;
}

.donate-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.donate-modal-content {
    position: relative;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    max-width: 90%;
    max-height: 90%;
    z-index: 10001;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.donate-modal-content img {
    max-width: 400px;
    width: 100%;
    height: auto;
    margin-bottom: 15px;
}

.donate-modal-content p {
    margin: 0;
    font-size: 16px;
    color: var(--text-color);
}

.donate-modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    line-height: 1;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.donate-modal-close:hover {
    background-color: var(--hover-bg);
}

/* 主容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

/* 日历区域 */
.calendar-section {
    background-color: var(--task-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

#calendar {
    width: 100%;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calendar-header button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 16px;
    padding: 5px 10px;
}

.calendar-header button:hover {
    background-color: var(--hover-bg);
    border-radius: 4px;
}

.calendar-month {
    font-size: 16px;
    font-weight: 600;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day-name {
    text-align: center;
    font-size: 12px;
    color: var(--completed-text);
    padding: 5px;
    font-weight: 600;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 4px;
    position: relative;
    font-size: 14px;
}

.calendar-day:hover {
    background-color: var(--hover-bg);
}

.calendar-day.today {
    border-color: var(--today-border);
    font-weight: 600;
}

.calendar-day.selected {
    background-color: var(--hover-bg);
    border-color: var(--today-border);
    font-weight: 600;
    box-shadow: 0 0 0 1px var(--today-border) inset;
}

.calendar-day-number {
    margin-bottom: 2px;
}

.calendar-day-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    position: absolute;
    bottom: 4px;
}

.calendar-day-dot.planned {
    background-color: var(--dot-planned);
}

.calendar-day-dot.overdue {
    background-color: var(--dot-overdue);
}

.calendar-day-dot.completed {
    background-color: var(--dot-completed);
}

/* 计划区域 */
.tasks-section {
    background-color: var(--task-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.tasks-section h2 {
    font-size: 24px;
    margin-bottom: 20px;
    font-weight: 600;
}

.tasks-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.tasks-title-wrapper {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.tasks-header h2 {
    margin-bottom: 0;
}

.streak-days {
    font-size: 14px;
    color: var(--completed-text);
    opacity: 0.6;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.task-input-container {
    margin-bottom: 20px;
}

#task-input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
}

#task-input:focus {
    outline: none;
    border-color: var(--today-border);
}

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

.task-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    cursor: grab;
}

.task-item:active {
    cursor: grabbing;
}

.task-item.killing {
    transform: scale(0.8);
    opacity: 0;
}

/* 拖拽排序时，整个页面使用 grabbing 光标 */
body.dragging-active {
    cursor: grabbing !important;
    user-select: none;
}

body.dragging-active * {
    cursor: grabbing !important;
}

/* 拖拽排序时，其他任务的位移动画 */
.tasks-list.dragging-active .task-item:not(.dragging) {
    transition: transform 0.25s cubic-bezier(0.2, 0, 0, 1);
}

.task-item.dragging {
    transform: scale(0.95);
    opacity: 0.95;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    cursor: grabbing !important;
    user-select: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.task-placeholder {
    background-color: var(--hover-bg);
    border: 2px dashed var(--today-border);
    border-radius: 4px;
    box-sizing: border-box;
    opacity: 0.6;
    transition: height 0.2s ease;
}

.task-item.drag-to-tomorrow {
    background-color: #e8f5e9 !important;
    border: 2px solid #4caf50 !important;
    opacity: 0.9;
}

.task-item.drag-to-tomorrow::after {
    content: attr(data-drag-hint);
    position: absolute;
    right: -80px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    color: #4caf50;
    font-weight: 600;
    white-space: nowrap;
}

.task-item.drag-to-yesterday {
    background-color: #fff3e0 !important;
    border: 2px solid #ff9800 !important;
    opacity: 0.9;
}

.task-item.drag-to-yesterday::after {
    content: attr(data-drag-hint);
    position: absolute;
    left: -80px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    color: #ff9800;
    font-weight: 600;
    white-space: nowrap;
}

.task-item-content {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
}

.task-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    flex-shrink: 0;
}

.task-text {
    flex: 1;
    font-size: 16px;
    cursor: text;
}

.task-text.editing {
    outline: 1px solid var(--today-border);
    padding: 4px 8px;
    border-radius: 4px;
}

.task-edit-input {
    flex: 1;
    padding: 4px 8px;
    font-size: 16px;
    border: 1px solid var(--today-border);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
}

.task-edit-input:focus {
    outline: none;
}

.task-delete {
    width: 18px;
    height: 18px;
    background: none;
    border: none;
    color: var(--completed-text);
    cursor: pointer;
    font-size: 14px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.task-item:hover .task-delete {
    opacity: 1;
}

.task-delete:hover {
    color: var(--dot-overdue);
}

.completed-section {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--task-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.completed-section details {
    cursor: pointer;
}

.completed-section summary {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    list-style: none;
}

.completed-section details[open] summary {
    margin-bottom: 32px;
}

.completed-section summary::-webkit-details-marker {
    display: none;
}

.completed-section summary::before {
    content: "▶ ";
    display: inline-block;
    margin-right: 5px;
    transition: transform 0.2s;
}

.completed-section details[open] summary::before {
    transform: rotate(90deg);
}

/* 展开时内容区最小高度与内边距，空列表也有明显打开反馈 */
.completed-section details[open] #completed-tasks {
    min-height: 56px;
    padding-top: 8px;
    padding-bottom: 20px;
    box-sizing: border-box;
}

.completed-section .task-item {
    opacity: 0.7;
    cursor: default;
}

.completed-section .task-text {
    color: var(--completed-text);
    text-decoration: line-through;
}

/* 底部声明 */
.footer {
    max-width: 1200px;
    margin: 30px auto 0;
    padding: 20px;
    text-align: center;
    font-size: 12px;
    color: var(--completed-text);
    border-top: 1px solid var(--border-color);
}

/* 响应式（仅桌面端，但保持基本可用性） */
@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
    
    .settings-panel {
        width: calc(100% - 40px);
        right: 20px;
        left: 20px;
    }
}