/* 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;
    --warning-bg: #fff3cd;
    --warning-text: #856404;
}

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;
    --warning-bg: #3d2f00;
    --warning-text: #ffd700;
}

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;
}

/* 顶部提示条 */
.warning-bar {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    padding: 15px 20px;
    margin: -20px -20px 20px -20px;
    border-bottom: 1px solid var(--border-color);
}

.warning-content {
    max-width: 1200px;
    margin: 0 auto;
}

.warning-content p {
    margin-bottom: 10px;
    font-size: 14px;
}

.warning-buttons {
    display: flex;
    gap: 10px;
}

.warning-buttons 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;
}

.warning-buttons button:hover {
    background-color: var(--hover-bg);
}

.warning-bar.hidden {
    display: none;
}

/* 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: 300px;
    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);
}

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

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

.settings-section {
    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 {
    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;
}

.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);
}

.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;
}

.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, opacity 0.3s;
}

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

.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: 15px;
    list-style: none;
}

.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);
}

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

.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;
    }
}