* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

html {
    touch-action: pan-x pan-y;
    -ms-touch-action: pan-x pan-y;
}

body {
    width: 100vw;
    height: var(--app-height, 100vh);
    overflow: hidden;
    overscroll-behavior: none;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
    background: #1a1a2e;
}

.ipad-screen {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(160deg, #e8d5e0 0%, #d4c5d9 25%, #c9b8d4 50%, #b8c6d9 75%, #d0d8e8 100%);
    position: relative;
    /* 安全区域适配 */
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}

/* 状态栏 */
.status-bar {
    height: 36px;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.95);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.3px;
    z-index: 100;
}

.status-left {
    font-variant-numeric: tabular-nums;
}

.status-right {
    display: flex;
    gap: 8px;
    align-items: center;
    font-size: 12px;
}

/* 桌面网格 */
.desktop-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 12px 16px;
    padding: 24px 48px;
    overflow: hidden;
}

/* Dock 栏 */
.dock {
    height: 100px;
    margin: 0 auto 24px;
    width: fit-content;
    background: rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    display: flex;
    justify-content: center;
    gap: 6px;
    padding: 12px 16px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
/* 图标槽位 */
.icon-slot {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.icon-slot:active {
    transform: scale(0.92);
}

/* 小组件槽位 (2x1) */
.icon-slot.widget-slot {
    grid-column: span 2;
}

/* dock 内小组件槽位用 flex 宽度 */
.dock .icon-slot.widget-slot {
    min-width: 140px;
}

.icon-slot.dragging {
    opacity: 0.5;
}

.icon-slot.drag-over {
    transform: scale(0.9);
}

.icon-slot.drag-invalid {
    background: rgba(255, 80, 80, 0.15);
    border-radius: 16px;
}

/* 图标 */
.app-icon {
    width: 68px;
    height: 68px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.08),
        0 4px 16px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), 
                box-shadow 0.25s ease;
    cursor: grab;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
}

/* 图标光泽效果 */
.app-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255,255,255,0.35) 0%, rgba(255,255,255,0) 100%);
    border-radius: 16px 16px 0 0;
    pointer-events: none;
}

.app-icon:active {
    cursor: grabbing;
}

.icon-slot:hover .app-icon {
    transform: scale(1.08);
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.12),
        0 8px 24px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.app-icon.dragging-icon {
    position: fixed;
    z-index: 1000;
    pointer-events: none;
    transform: scale(1.15);
    opacity: 0.85;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

/* 图标名称 */
.app-name {
    margin-top: 6px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
    text-align: center;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
    letter-spacing: 0.2px;
}

/* Dock 内的图标更小 */
.dock .app-icon {
    width: 56px;
    height: 56px;
    font-size: 28px;
    border-radius: 14px;
}

.dock .app-name {
    font-size: 10px;
    margin-top: 4px;
    max-width: 60px;
}

/* 空槽位 */
.icon-slot.empty {
    background: transparent;
}

/* dock 内的空槽位默认隐藏，拖拽时显示 */
.dock .icon-slot.empty {
    display: none;
}

.dock .icon-slot.empty.dock-drop-target {
    display: flex;
    width: 56px;
    min-width: 56px;
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 14px;
    min-height: 60px;
}

/* 响应式调整 */

/* 竖屏平板 (768px - 1024px portrait) */
@media (max-width: 1024px) {
    .desktop-grid {
        padding: 20px 36px;
        gap: 10px 14px;
    }
    
    .dock {
        margin-bottom: 20px;
    }
    
    .app-icon {
        width: 62px;
        height: 62px;
        font-size: 30px;
        border-radius: 15px;
    }
    
    .dock .app-icon {
        width: 50px;
        height: 50px;
        font-size: 25px;
    }
}

/* 小平板/大手机 (max-width: 768px) */
@media (max-width: 768px) {
    .status-bar {
        height: 44px;
        padding: 0 20px;
        padding-top: env(safe-area-inset-top, 0px);
    }

    .desktop-grid {
        padding: 16px 24px;
        gap: 8px 10px;
    }
    
    .dock {
        margin-bottom: 16px;
        margin-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
        height: 88px;
        padding: 10px 12px;
        border-radius: 20px;
    }
    
    .app-icon {
        width: 54px;
        height: 54px;
        font-size: 26px;
        border-radius: 13px;
    }
    
    .dock .app-icon {
        width: 46px;
        height: 46px;
        font-size: 22px;
        border-radius: 12px;
    }
    
    .app-name {
        font-size: 10px;
    }
    
    .dock .app-name {
        font-size: 9px;
    }
}

/* 竖屏模式：平板竖着拿时切换为5列 */
@media (max-width: 900px) and (orientation: portrait) {
    .desktop-grid {
        grid-template-columns: repeat(5, 1fr);
        grid-template-rows: repeat(5, 1fr);
        padding: 20px 32px;
        gap: 10px;
    }
    
    .dock {
        height: 92px;
    }
}

/* 小屏竖屏：4列 */
@media (max-width: 600px) and (orientation: portrait) {
    .desktop-grid {
        grid-template-columns: repeat(4, 1fr);
        grid-template-rows: repeat(6, 1fr);
        padding: 16px 20px;
        gap: 8px;
    }
    
    .dock {
        height: 84px;
        padding: 8px 10px;
    }
    
    .app-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
        border-radius: 12px;
    }
    
    .dock .app-icon {
        width: 44px;
        height: 44px;
        font-size: 20px;
        border-radius: 11px;
    }
    
    .app-name {
        font-size: 9px;
        margin-top: 4px;
    }
}

/* 横屏模式优化 */
@media (orientation: landscape) and (max-height: 500px) {
    .status-bar {
        height: 28px;
        font-size: 11px;
    }
    
    .desktop-grid {
        padding: 8px 48px;
        gap: 6px 12px;
    }
    
    .dock {
        height: 76px;
        margin-bottom: 8px;
        padding: 8px 14px;
    }
    
    .app-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
        border-radius: 12px;
    }
    
    .dock .app-icon {
        width: 42px;
        height: 42px;
        font-size: 20px;
    }
    
    .app-name {
        font-size: 9px;
        margin-top: 3px;
    }
}

/* ===== 移动端性能优化 ===== */
/* 触摸设备上禁用 backdrop-filter blur，大幅提升渲染性能 */
@media (hover: none) and (pointer: coarse) {
    .dock {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(255, 255, 255, 0.35);
    }
    
    .app-icon {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(255, 255, 255, 0.9);
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
    
    .app-icon::before {
        /* 简化光泽效果 */
        background: linear-gradient(180deg, rgba(255,255,255,0.25) 0%, rgba(255,255,255,0) 50%);
    }
    
    .icon-slot:hover .app-icon {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
    
    /* 减少不必要的 transition */
    .icon-slot {
        transition: transform 0.15s ease;
    }
    
    .app-icon {
        transition: transform 0.15s ease;
    }
}