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

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(51, 65, 85, 0.6);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --shadow: rgba(0, 0, 0, 0.3);
    --accent: #3b82f6;
    
    --status-ongoing: #e67e22;
    --status-paused: #f1c40f;
    --status-done: #27ae60;
    --status-discard: #95a5a6;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #f8fafc;
        --bg-secondary: #f1f5f9;
        --bg-card: rgba(255, 255, 255, 0.85);
        --text-primary: #0f172a;
        --text-secondary: #64748b;
        --border-color: #e2e8f0;
        --shadow: rgba(0, 0, 0, 0.06);
        --accent: #2563eb;
        
        --status-ongoing: #d97706;
        --status-paused: #ca8a04;
        --status-done: #16a34a;
        --status-discard: #9ca3af;
    }
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.85);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.06);
    --accent: #2563eb;
    
    --status-ongoing: #d97706;
    --status-paused: #ca8a04;
    --status-done: #16a34a;
    --status-discard: #9ca3af;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.desktop-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

.left-panel {
    width: 60%;
    height: 100%;
    padding: 30px 40px;
    overflow-y: auto;
    background-color: var(--bg-primary);
    border-right: 1px solid var(--border-color);
}

.right-panel {
    width: 40%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
}

.right-top {
    flex: 8;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overflow: hidden;
}

.right-middle {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.right-bottom {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    background-color: var(--bg-primary);
}

.cover-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 8px 32px var(--shadow);
}

.mobile-container {
    display: none;
}

.panel-header {
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

/* 标题：普通颜色，无渐变 */
.panel-header h1 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: 1px;
    color: var(--text-primary);
}

/* 新增：标题图标固定颜色，不随主题变化 */
.title-icon {
    color: #f1c40f;  /* 固定金黄色 */
    margin-right: 6px;
}

.update-time {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 20px;
}

/* ====== 一级任务卡片：按状态染色 ====== */
.task-card {
    background: var(--bg-card);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: border-color 0.3s ease;
    backdrop-filter: blur(10px);
    border-left: 4px solid transparent;
    contain: layout;  /* 优化渲染，防止重排闪烁 */
}

.task-card[data-status="进行"] {
    border-left-color: var(--status-ongoing);
    background: linear-gradient(90deg, color-mix(in srgb, var(--status-ongoing) 10%, var(--bg-card)) 0%, var(--bg-card) 60%);
}
.task-card[data-status="暂停"] {
    border-left-color: var(--status-paused);
    background: linear-gradient(90deg, color-mix(in srgb, var(--status-paused) 10%, var(--bg-card)) 0%, var(--bg-card) 60%);
}
.task-card[data-status="完成"] {
    border-left-color: var(--status-done);
    background: linear-gradient(90deg, color-mix(in srgb, var(--status-done) 10%, var(--bg-card)) 0%, var(--bg-card) 60%);
}
.task-card[data-status="丢弃"] {
    border-left-color: var(--status-discard);
    background: linear-gradient(90deg, color-mix(in srgb, var(--status-discard) 10%, var(--bg-card)) 0%, var(--bg-card) 60%);
    opacity: 0.7;
}

/* 去掉 hover transform，避免点击时与展开动画冲突导致闪烁 */
.task-card:hover {
    border-color: color-mix(in srgb, var(--accent) 30%, var(--border-color));
}

.task-header {
    padding: 18px 20px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s;
}

.task-header:hover {
    background-color: color-mix(in srgb, var(--accent) 5%, transparent);
}

.task-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.expand-icon {
    font-size: 11px;
    color: var(--text-secondary);
    transition: transform 0.25s ease;
    display: inline-flex;
    width: 18px;
    height: 18px;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    background: color-mix(in srgb, var(--text-secondary) 10%, transparent);
}

.task-card.expanded .expand-icon {
    transform: rotate(90deg);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 8px currentColor;
}

.status-dot[data-status="进行"] { color: var(--status-ongoing); background-color: var(--status-ongoing); }
.status-dot[data-status="暂停"] { color: var(--status-paused); background-color: var(--status-paused); }
.status-dot[data-status="完成"] { color: var(--status-done); background-color: var(--status-done); }
.status-dot[data-status="丢弃"] { color: var(--status-discard); background-color: var(--status-discard); }

.task-name {
    font-size: 17px;
    font-weight: 600;
    flex: 1;
    color: var(--text-primary);
}

.status-badge {
    font-size: 11px;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.status-badge[data-status="进行"] {
    background-color: color-mix(in srgb, var(--status-ongoing) 15%, transparent);
    color: var(--status-ongoing);
    border: 1px solid color-mix(in srgb, var(--status-ongoing) 30%, transparent);
}
.status-badge[data-status="暂停"] {
    background-color: color-mix(in srgb, var(--status-paused) 15%, transparent);
    color: var(--status-paused);
    border: 1px solid color-mix(in srgb, var(--status-paused) 30%, transparent);
}
.status-badge[data-status="完成"] {
    background-color: color-mix(in srgb, var(--status-done) 15%, transparent);
    color: var(--status-done);
    border: 1px solid color-mix(in srgb, var(--status-done) 30%, transparent);
}
.status-badge[data-status="丢弃"] {
    background-color: color-mix(in srgb, var(--status-discard) 15%, transparent);
    color: var(--status-discard);
    border: 1px solid color-mix(in srgb, var(--status-discard) 30%, transparent);
}

/* ====== 折叠：简化动画，去掉 padding/gap 过渡，防止闪烁 ====== */
.subtask-list {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease-out, opacity 0.2s ease;
    padding: 0 20px;
    border-left: 2px solid var(--border-color);
    margin-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;  /* 固定 gap，不动画 */
}

.task-card.expanded .subtask-list {
    max-height: 800px;
    opacity: 1;
    padding: 12px 20px 16px 20px;
}

.subtask-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 5px 0;
}

.sub-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sub-dot[data-status="进行"] { background-color: var(--status-ongoing); }
.sub-dot[data-status="暂停"] { background-color: var(--status-paused); }
.sub-dot[data-status="完成"] { background-color: var(--status-done); }
.sub-dot[data-status="丢弃"] { background-color: var(--status-discard); }

.sub-name {
    font-size: 14px;
    color: var(--text-secondary);
    flex: 1;
}

.sub-status {
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.sub-status[data-status="进行"] { color: var(--status-ongoing); }
.sub-status[data-status="暂停"] { color: var(--status-paused); }
.sub-status[data-status="完成"] { color: var(--status-done); }
.sub-status[data-status="丢弃"] { color: var(--status-discard); }

/* 时钟 */
.clock-box {
    text-align: center;
    color: var(--text-primary);
}

.clock-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 6px;
    font-weight: 600;
}

.clock-time {
    font-size: 32px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 2px;
    color: var(--accent);
    text-shadow: 0 0 20px color-mix(in srgb, var(--accent) 30%, transparent);
    line-height: 1.2;
}

.clock-date {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 500;
}

/* 备案 */
.beian-box {
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.8;
}

.beian-box i {
    margin-right: 4px;
    color: var(--accent);
}

.beian-box a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px dotted var(--text-secondary);
    transition: all 0.2s;
}

.beian-box a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ====== 移动端响应式 ====== */
@media screen and (max-width: 768px) {
    body {
        overflow: auto;
        height: auto;
    }

    .desktop-container {
        display: none;
    }

    .mobile-container {
        display: flex;
        flex-direction: column;
        min-height: 100vh;
    }

    .mobile-header {
        padding: 32px 20px 20px;
        background-color: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
    }

    .mobile-header .clock-time {
        font-size: 36px;
    }

    /* 手机端横幅图 */
    .phone-banner {
        width: 100%;
        max-height: 160px;
        object-fit: cover;
        border-radius: 10px;
        margin-top: 14px;
        box-shadow: 0 4px 16px var(--shadow);
        display: block;
    }

    .mobile-content {
        flex: 1;
        padding: 24px 20px;
        background-color: var(--bg-primary);
    }

    .mobile-content .panel-header h1 {
        font-size: 22px;
    }

    .mobile-footer {
        padding: 24px 20px;
        background-color: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
    }

    .task-card {
        border-radius: 12px;
    }

    .task-header {
        padding: 16px 18px;
    }

    .task-name {
        font-size: 15px;
    }

    .sub-name {
        font-size: 13px;
    }
}