/* ============================================
   796Helper - CSS Variables / Design Tokens
   ============================================ */

/* --- Dark Theme (Default) --- */
:root,
[data-theme="dark"] {
    /* Primary */
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --primary-dark: #5A4BD1;
    --accent: #00CEC9;
    --accent-light: #55EFC4;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6C5CE7, #A29BFE);
    --gradient-accent: linear-gradient(135deg, #6C5CE7, #00CEC9);
    --gradient-subtle: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(0, 206, 201, 0.05));

    /* Background */
    --bg-base: #0F0F1A;
    --bg-surface: #1A1A2E;
    --bg-elevated: #16213E;
    --bg-overlay: rgba(15, 15, 26, 0.85);
    --bg-glass: rgba(26, 26, 46, 0.6);
    --bg-glass-hover: rgba(26, 26, 46, 0.8);
    --bg-input: rgba(22, 33, 62, 0.5);

    /* Text */
    --text-primary: #EAEAEA;
    --text-secondary: #A0A0B8;
    --text-muted: #636E82;
    --text-inverse: #0F0F1A;

    /* Border */
    --border-default: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(108, 92, 231, 0.5);
    --border-glow: rgba(108, 92, 231, 0.3);

    /* Shadow */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(108, 92, 231, 0.15);
    --shadow-glow-strong: 0 0 30px rgba(108, 92, 231, 0.3);

    /* Functional */
    --success: #00B894;
    --error: #FF7675;
    --warning: #FDCB6E;
    --info: #74B9FF;

    /* Sidebar */
    --sidebar-bg: rgba(15, 15, 26, 0.95);
    --sidebar-active-bg: rgba(108, 92, 231, 0.12);
    --sidebar-hover-bg: rgba(255, 255, 255, 0.04);
    --sidebar-indicator: #6C5CE7;

    /* Scrollbar */
    --scrollbar-track: transparent;
    --scrollbar-thumb: rgba(255, 255, 255, 0.1);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);
}

/* --- Light Theme --- */
[data-theme="light"] {
    /* Primary */
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --primary-dark: #5A4BD1;
    --accent: #00CEC9;
    --accent-light: #55EFC4;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6C5CE7, #A29BFE);
    --gradient-accent: linear-gradient(135deg, #6C5CE7, #00CEC9);
    --gradient-subtle: linear-gradient(135deg, rgba(108, 92, 231, 0.05), rgba(0, 206, 201, 0.03));

    /* Background */
    --bg-base: #F8F9FE;
    --bg-surface: #FFFFFF;
    --bg-elevated: #FFFFFF;
    --bg-overlay: rgba(248, 249, 254, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-hover: rgba(255, 255, 255, 0.85);
    --bg-input: rgba(248, 249, 254, 0.8);

    /* Text */
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --text-muted: #A0A0B8;
    --text-inverse: #FFFFFF;

    /* Border */
    --border-default: rgba(0, 0, 0, 0.06);
    --border-light: rgba(0, 0, 0, 0.1);
    --border-focus: rgba(108, 92, 231, 0.4);
    --border-glow: rgba(108, 92, 231, 0.2);

    /* Shadow */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 20px rgba(108, 92, 231, 0.08);
    --shadow-glow-strong: 0 0 30px rgba(108, 92, 231, 0.15);

    /* Functional */
    --success: #00B894;
    --error: #FF7675;
    --warning: #FDCB6E;
    --info: #74B9FF;

    /* Sidebar */
    --sidebar-bg: rgba(255, 255, 255, 0.95);
    --sidebar-active-bg: rgba(108, 92, 231, 0.08);
    --sidebar-hover-bg: rgba(0, 0, 0, 0.03);
    --sidebar-indicator: #6C5CE7;

    /* Scrollbar */
    --scrollbar-track: transparent;
    --scrollbar-thumb: rgba(0, 0, 0, 0.12);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.2);
}

/* --- Global Design Tokens --- */
:root {
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transition */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 28px;
    --font-size-3xl: 36px;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Layout */
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 68px;
    --header-height: 60px;

    /* Z-index */
    --z-sidebar: 100;
    --z-overlay: 90;
    --z-header: 80;
    --z-dropdown: 110;
    --z-modal: 120;

    /* Glassmorphism */
    --glass-blur: blur(20px);
    --glass-blur-heavy: blur(40px);
}

/* --- Responsive Design Token Overrides (Tablet) --- */
@media (max-width: 768px) {
    :root {
        /* Typography - 平板/大屏手机 */
        --font-size-xl: 22px;
        --font-size-2xl: 24px;
        --font-size-3xl: 30px;

        /* Spacing - 适度缩小 */
        --space-lg: 20px;
        --space-xl: 24px;
        --space-2xl: 36px;

        /* Layout */
        --header-height: 52px;
    }
}

/* --- Responsive Design Token Overrides (Mobile) --- */
@media (max-width: 480px) {
    :root {
        /* Typography - 小屏手机 */
        --font-size-lg: 16px;
        --font-size-xl: 20px;
        --font-size-2xl: 22px;
        --font-size-3xl: 26px;

        /* Spacing - 进一步缩小 */
        --space-lg: 16px;
        --space-xl: 20px;
        --space-2xl: 28px;

        /* Layout */
        --header-height: 48px;
    }
}