@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;600;800;900&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-color: #f1f5f9; /* 亮浅灰蓝背景 */
    --panel-bg: rgba(255, 255, 255, 0.78); /* 半透明白毛玻璃 */
    --panel-border: rgba(0, 0, 0, 0.08);
    --accent-blue: #0284c7;  /* 高对比度天蓝 */
    --accent-green: #15803d; /* 深极光绿 */
    --accent-cyan: #0891b2;
    --text-primary: #0f172a;   /* 炭黑主字 */
    --text-secondary: #334155; /* 深灰字 */
    --text-muted: #64748b;     /* 中灰字 */
    --glow-blue: 0 0 10px rgba(2, 132, 199, 0.15);
    --glow-green: 0 0 10px rgba(21, 128, 61, 0.15);
    --font-cyber: 'Orbitron', sans-serif;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* 浮动控制面板 */
.dashboard {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 380px;
    max-height: calc(100vh - 40px);
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 16px;
    z-index: 10;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.6);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.1) transparent;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), border-radius 0.3s, max-height 0.4s;
}

.dashboard::-webkit-scrollbar {
    width: 4px;
}
.dashboard::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

/* 标题样式 */
.header h1 {
    font-family: var(--font-cyber);
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
}

.header p {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-cyber);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 快捷信息卡片 */
.status-bar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.status-card {
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(0, 0, 0, 0.04);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
}

.status-label {
    font-size: 9px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-cyber);
}

.status-value {
    font-family: var(--font-cyber);
    font-size: 14px;
    font-weight: 700;
    margin-top: 4px;
    color: var(--accent-blue);
}

.status-value.green {
    color: var(--accent-green);
}

/* 滑块容器 */
.control-group {
    background: rgba(0, 0, 0, 0.01);
    border: 1px solid rgba(0, 0, 0, 0.03);
    border-radius: 12px;
    padding: 16px;
}

.control-group-title {
    font-family: var(--font-cyber);
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 6px;
    font-weight: 600;
}

.slider-container {
    margin-bottom: 12px;
}
.slider-container:last-child {
    margin-bottom: 0;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.slider-value {
    font-family: var(--font-cyber);
    color: var(--accent-blue);
    font-size: 11px;
    background: rgba(2, 132, 199, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    min-width: 40px;
    text-align: right;
}

.custom-range {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 3px;
    outline: none;
    transition: background 0.3s;
}

.custom-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: var(--glow-blue);
    transition: transform 0.1s, background-color 0.3s;
}

.custom-range:hover::-webkit-slider-thumb {
    transform: scale(1.25);
}

.custom-range.green::-webkit-slider-thumb {
    background: var(--accent-green);
    box-shadow: var(--glow-green);
}

/* 按钮与操作区域 */
.button-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.btn {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 8px;
    color: var(--text-secondary);
    padding: 10px;
    font-size: 12px;
    font-family: var(--font-cyber);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    background: rgba(2, 132, 199, 0.08);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    box-shadow: var(--glow-blue);
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.1), rgba(22, 163, 74, 0.1));
    border: 1px solid rgba(2, 132, 199, 0.3);
    color: var(--accent-blue);
}

.btn-primary:hover {
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.2), rgba(22, 163, 74, 0.2));
    border-color: var(--accent-green);
    color: var(--accent-green);
    box-shadow: 0 0 15px rgba(22, 163, 74, 0.2);
}

.btn-active {
    background: var(--accent-green) !important;
    color: #fff !important;
    border-color: var(--accent-green) !important;
    box-shadow: var(--glow-green);
    font-weight: 700;
}

/* 材质选择器 */
.material-selector {
    display: flex;
    gap: 6px;
}

.material-btn {
    flex: 1;
    font-size: 10px;
    padding: 8px 4px;
}

/* 提示与遮罩 */
.instruction-box {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 8px;
    padding: 12px 16px;
    z-index: 10;
    max-width: 320px;
    box-shadow: 0 5px 25px rgba(15, 23, 42, 0.06);
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.6;
    pointer-events: none;
}

.instruction-title {
    font-family: var(--font-cyber);
    color: var(--accent-blue);
    font-weight: 700;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* HUD 标志效果 */
.hud-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 250px;
    height: 250px;
    border: 1px dashed rgba(2, 132, 199, 0.08);
    border-radius: 50%;
    pointer-events: none;
    z-index: 2;
    animation: rotateHUD 60s linear infinite;
}

.hud-ring::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 10px;
    background: var(--accent-blue);
    border-radius: 50%;
    box-shadow: var(--glow-blue);
}

@keyframes rotateHUD {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 选项卡导航与移动端专属元素默认隐藏 */
.tab-nav,
.menu-toggle-btn,
.close-panel-btn,
.panel-overlay {
    display: none !important;
}

/* 移动端适配 */
@media (max-width: 768px) {
    /* 悬浮菜单按钮 */
    .menu-toggle-btn {
        display: flex !important;
        justify-content: center;
        align-items: center;
        position: fixed;
        top: 16px;
        right: 16px;
        width: 50px;
        height: 50px;
        border-radius: 50%;
        background: var(--panel-bg);
        border: 1px solid var(--panel-border);
        color: var(--accent-blue);
        font-size: 15px;
        font-family: var(--font-sans);
        font-weight: 600;
        cursor: pointer;
        z-index: 90;
        box-shadow: 0 4px 15px rgba(15, 23, 42, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.6);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }
    
    .menu-toggle-btn:hover {
        transform: scale(1.08);
        color: var(--accent-green);
        border-color: rgba(21, 128, 61, 0.2);
        box-shadow: 0 6px 20px rgba(15, 23, 42, 0.12);
    }
    
    /* 侧边栏关闭按钮 */
    .close-panel-btn {
        display: flex !important;
        justify-content: center;
        align-items: center;
        position: absolute;
        top: 20px;
        right: 20px;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: rgba(0, 0, 0, 0.03);
        border: 1px solid rgba(0, 0, 0, 0.06);
        color: var(--text-secondary);
        font-size: 12px;
        font-weight: 700;
        cursor: pointer;
        z-index: 110;
        transition: all 0.2s;
    }
    
    .close-panel-btn:hover {
        background: rgba(239, 68, 68, 0.1);
        border-color: rgba(239, 68, 68, 0.2);
        color: #ef4444;
    }

    /* 遮罩层 */
    .panel-overlay {
        display: block !important;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(15, 23, 42, 0.25);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 95;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    
    .panel-overlay.open {
        opacity: 1;
        pointer-events: auto;
    }

    /* 侧边控制面板重构为侧边栏 */
    .dashboard {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: auto;
        width: 320px;
        max-width: 85vw;
        height: 100vh;
        max-height: 100vh;
        border-radius: 20px 0 0 20px;
        padding: 24px;
        gap: 16px;
        box-shadow: -5px 0 25px rgba(15, 23, 42, 0.12);
        transform: translateX(100%);
        z-index: 100;
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        background: var(--panel-bg);
    }
    
    .dashboard.open {
        transform: translateX(0);
    }
    
    .dashboard .header h1 {
        font-size: 18px;
        padding-right: 24px;
    }
    
    .instruction-box {
        display: none;
    }

    .tab-nav {
        display: flex;
        width: 100%;
        gap: 6px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        padding-bottom: 8px;
        margin-bottom: 4px;
    }

    .tab-btn {
        flex: 1;
        background: rgba(0,0,0,0.02);
        border: 1px solid rgba(0,0,0,0.04);
        border-radius: 6px;
        color: var(--text-muted);
        padding: 8px 4px;
        font-family: var(--font-cyber);
        font-size: 11px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s;
        text-align: center;
    }

    .tab-btn:hover {
        background: rgba(2, 132, 199, 0.05);
        color: var(--accent-blue);
    }

    .tab-btn.active {
        background: rgba(2, 132, 199, 0.08);
        border-color: rgba(2, 132, 199, 0.2);
        color: var(--accent-blue);
        box-shadow: var(--glow-blue);
    }

    /* 移动端下默认隐藏所有控制面板组 */
    #group-joints,
    #group-gripper,
    #group-presets,
    #group-settings {
        display: none;
    }

    /* 根据 dashboard 面板的 active 类名单独激活显示对应组 */
    .dashboard.active-joints #group-joints,
    .dashboard.active-joints #group-gripper {
        display: block;
    }

    .dashboard.active-presets #group-presets {
        display: block;
    }

    .dashboard.active-settings #group-settings {
        display: block;
    }
}

/* 桌面端强制展开所有组 */
@media (min-width: 769px) {
    .tab-nav {
        display: none !important;
    }
    
    #group-joints,
    #group-gripper,
    #group-presets,
    #group-settings {
        display: block !important;
    }
}