/* ==========================================
   Design System - Orange Theme Edition
   Dark/Light Mode Support
   ========================================== */

:root {
    /* Orange Theme - Primary Colors */
    --color-orange: rgb(255, 165, 0);
    --color-orange-light: rgb(255, 179, 51);
    --color-orange-dark: rgb(230, 140, 0);
    --color-orange-glow: rgba(255, 165, 0, 0.5);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, rgb(255, 165, 0) 0%, rgb(255, 140, 0) 100%);
    --gradient-secondary: linear-gradient(135deg, rgb(255, 120, 0) 0%, rgb(255, 90, 0) 100%);

    /* Spacing Scale */
    --space-1: 0.25rem;
    /* 4px */
    --space-2: 0.5rem;
    /* 8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.5rem;
    /* 24px */
    --space-6: 2rem;
    /* 32px */
    --space-7: 2.5rem;
    /* 40px */
    --space-8: 3rem;
    /* 48px */
    --space-10: 4rem;
    /* 64px */
    --space-12: 6rem;
    /* 96px */

    /* Typography Scale */
    --font-family-base: 'Sarabun', 'IBM Plex Sans Thai Looped', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-heading: 'Sarabun', sans-serif;
    --font-family-mono: 'Fira Code', 'Consolas', monospace;

    --font-size-xs: 0.875rem;
    /* 14px */
    --font-size-sm: 1rem;
    /* 16px */
    --font-size-base: 1.125rem;
    /* 18px */
    --font-size-lg: 1.25rem;
    /* 20px */
    --font-size-xl: 1.375rem;
    /* 22px */
    --font-size-2xl: 1.625rem;
    /* 26px */
    --font-size-3xl: 2rem;
    /* 32px */
    --font-size-4xl: 2.375rem;
    /* 38px */

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Border Radius */
    --radius-sm: 0.25rem;
    /* 4px */
    --radius-md: 0.5rem;
    /* 8px */
    --radius-lg: 0.75rem;
    /* 12px */
    --radius-xl: 1rem;
    /* 16px */
    --radius-2xl: 1.5rem;
    /* 24px */
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   Light Mode (Default)
   ========================================== */
[data-theme="light"] {
    /* Background Colors */
    --color-bg-primary: #f5f5f5;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #fafafa;

    /* Text Colors */
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4a4a4a;
    --color-text-tertiary: #757575;

    /* Primary Colors */
    --color-primary: rgb(255, 165, 0);
    --color-primary-light: rgb(255, 179, 51);
    --color-primary-dark: rgb(230, 140, 0);

    /* Accent Colors */
    --color-accent: rgb(255, 120, 0);
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Border & Shadow */
    --color-border: rgba(0, 0, 0, 0.1);
    --color-border-light: rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(255, 165, 0, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(255, 165, 0, 0.4);

    /* Card & Surface */
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.2);

    /* Layout Colors */
    --sidebar-bg: var(--color-bg-secondary);
    --sidebar-border: var(--color-border);
    --header-bg: rgba(255, 255, 255, 0.8);
    --header-border: var(--color-border);
}

/* ==========================================
   Dark Mode
   ========================================== */
[data-theme="dark"] {
    /* Background Colors */
    --color-bg-primary: #0f0f0f;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #242424;

    /* Text Colors */
    --color-text-primary: #f5f5f5;
    --color-text-secondary: #b8b8b8;
    --color-text-tertiary: #8a8a8a;

    /* Primary Colors */
    --color-primary: rgb(255, 165, 0);
    --color-primary-light: rgb(255, 179, 51);
    --color-primary-dark: rgb(230, 140, 0);

    /* Accent Colors */
    --color-accent: rgb(255, 120, 0);
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Border & Shadow */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-light: rgba(255, 255, 255, 0.05);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(255, 165, 0, 0.4);
    --shadow-glow-lg: 0 0 40px rgba(255, 165, 0, 0.5);

    /* Card & Surface */
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* Layout Colors */
    --sidebar-bg: #141414;
    --sidebar-border: var(--color-border);
    --header-bg: rgba(20, 20, 20, 0.8);
    --header-border: var(--color-border);
}

/* ==========================================
   Global Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ==========================================
   Utility Classes
   ========================================== */
.text-primary {
    color: var(--color-text-primary);
}

.text-secondary {
    color: var(--color-text-secondary);
}

.text-tertiary {
    color: var(--color-text-tertiary);
}

.bg-primary {
    background-color: var(--color-bg-primary);
}

.bg-secondary {
    background-color: var(--color-bg-secondary);
}

.bg-tertiary {
    background-color: var(--color-bg-tertiary);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-md {
    box-shadow: var(--shadow-md);
}

.shadow-lg {
    box-shadow: var(--shadow-lg);
}

.shadow-glow {
    box-shadow: var(--shadow-glow);
}