/**
 * ITM Rising 2026 - Design Tokens
 * Centralized color system, typography, and spacing
 * Usage: Apply tokens to components and utilities
 */

:root {
    /* ========================================== */
    /* PRIMARY COLORS */
    /* ========================================== */
    --color-primary-orange: #FF6B00;
    --color-primary-navy: #0B1E36;
    --color-primary-navy-light: #1F355A;
    --color-primary-orange-light: #FFF5EC;

    /* ========================================== */
    /* NEUTRAL COLORS (Light Mode) */
    /* ========================================== */
    --color-white: #FFFFFF;
    --color-light-bg: #F0F4F8;
    --color-soft-dark: #050C16;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    /* ========================================== */
    /* SEMANTIC COLORS */
    /* ========================================== */
    --color-success: #10B981;
    --color-success-light: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-light: #FEF3C7;
    --color-danger: #EF4444;
    --color-danger-light: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-light: #DBEAFE;

    /* ========================================== */
    /* TEXT COLORS (Light Mode) */
    /* ========================================== */
    --text-primary: #050C16;
    --text-secondary: #4B5563;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;

    /* ========================================== */
    /* BACKGROUND COLORS (Light Mode) */
    /* ========================================== */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F0F4F8;
    --bg-overlay: rgba(5, 12, 22, 0.7);

    /* ========================================== */
    /* TYPOGRAPHY */
    /* ========================================== */
    --font-family-display: 'Kanit', sans-serif;
    --font-family-body: 'Kanit', sans-serif;
    --font-family-mono: 'Courier New', monospace;

    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;

    /* ========================================== */
    /* TYPE SCALE */
    /* ========================================== */
    --font-size-xs: 0.75rem; /* 12px */
    --font-size-sm: 0.875rem; /* 14px */
    --font-size-base: 1rem; /* 16px */
    --font-size-lg: 1.125rem; /* 18px */
    --font-size-xl: 1.25rem; /* 20px */
    --font-size-2xl: 1.5rem; /* 24px */
    --font-size-3xl: 1.875rem; /* 30px */
    --font-size-4xl: 2.25rem; /* 36px */

    /* ========================================== */
    /* LINE HEIGHTS */
    /* ========================================== */
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* ========================================== */
    /* SPACING SCALE */
    /* ========================================== */
    --spacing-xs: 0.25rem; /* 4px */
    --spacing-sm: 0.5rem; /* 8px */
    --spacing-md: 1rem; /* 16px */
    --spacing-lg: 1.5rem; /* 24px */
    --spacing-xl: 2rem; /* 32px */
    --spacing-2xl: 3rem; /* 48px */
    --spacing-3xl: 4rem; /* 64px */
    --spacing-4xl: 6rem; /* 96px */

    /* ========================================== */
    /* BORDER RADIUS */
    /* ========================================== */
    --radius-none: 0;
    --radius-sm: 0.375rem; /* 6px */
    --radius-md: 0.5rem; /* 8px */
    --radius-lg: 0.75rem; /* 12px */
    --radius-xl: 1rem; /* 16px */
    --radius-2xl: 1.5rem; /* 24px */
    --radius-3xl: 2rem; /* 32px */
    --radius-full: 9999px;

    /* ========================================== */
    /* SHADOWS */
    /* ========================================== */
    --shadow-none: none;
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* ========================================== */
    /* TRANSITIONS */
    /* ========================================== */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* ========================================== */
    /* COMPONENT SIZES */
    /* ========================================== */
    --button-height: 2.5rem; /* 40px */
    --button-height-sm: 2rem; /* 32px */
    --button-height-lg: 3rem; /* 48px */

    --input-height: 2.5rem; /* 40px */
    --input-height-sm: 2rem; /* 32px */
    --input-height-lg: 3rem; /* 48px */
}

/* ========================================== */
/* DARK MODE THEME */
/* ========================================== */
@media (prefers-color-scheme: dark) {
    :root {
        /* ========================================== */
        /* DARK MODE: NEUTRAL COLORS */
        /* ========================================== */
        --color-white: #0F172A;
        --color-light-bg: #1E293B;
        --color-soft-dark: #F3F4F6;
        --color-gray-50: #1F2937;
        --color-gray-100: #374151;
        --color-gray-200: #4B5563;
        --color-gray-300: #6B7280;
        --color-gray-400: #9CA3AF;
        --color-gray-600: #D1D5DB;
        --color-gray-700: #E5E7EB;
        --color-gray-800: #F3F4F6;
        --color-gray-900: #F9FAFB;

        /* ========================================== */
        /* DARK MODE: TEXT COLORS */
        /* ========================================== */
        --text-primary: #F3F4F6;
        --text-secondary: #D1D5DB;
        --text-tertiary: #9CA3AF;
        --text-inverse: #0F172A;

        /* ========================================== */
        /* DARK MODE: BACKGROUND COLORS */
        /* ========================================== */
        --bg-primary: #0F172A;
        --bg-secondary: #1A202C;
        --bg-tertiary: #1E293B;
        --bg-overlay: rgba(243, 244, 246, 0.1);
    }
}

/* ========================================== */
/* LIGHT MODE OVERRIDE (Explicit) */
/* ========================================== */
:root[data-theme="light"] {
    /* Reset to light values */
    --color-white: #FFFFFF;
    --color-light-bg: #F0F4F8;
    --color-soft-dark: #050C16;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    --text-primary: #050C16;
    --text-secondary: #4B5563;
    --text-tertiary: #9CA3AF;
    --text-inverse: #FFFFFF;

    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F0F4F8;
    --bg-overlay: rgba(5, 12, 22, 0.7);
}

/* ========================================== */
/* DARK MODE OVERRIDE (Explicit) */
/* ========================================== */
:root[data-theme="dark"] {
    --color-white: #0F172A;
    --color-light-bg: #1E293B;
    --color-soft-dark: #F3F4F6;
    --color-gray-50: #1F2937;
    --color-gray-100: #374151;
    --color-gray-200: #4B5563;
    --color-gray-300: #6B7280;
    --color-gray-400: #9CA3AF;
    --color-gray-600: #D1D5DB;
    --color-gray-700: #E5E7EB;
    --color-gray-800: #F3F4F6;
    --color-gray-900: #F9FAFB;

    --text-primary: #F3F4F6;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --text-inverse: #0F172A;

    --bg-primary: #0F172A;
    --bg-secondary: #1A202C;
    --bg-tertiary: #1E293B;
    --bg-overlay: rgba(243, 244, 246, 0.1);
}

/* ========================================== */
/* UTILITY CLASSES */
/* ========================================== */

/* Text Colors */
.text-primary {
    color: var(--text-primary);
}

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

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

.text-orange {
    color: var(--color-primary-orange);
}

.text-navy {
    color: var(--color-primary-navy);
}

/* Background Colors */
.bg-primary {
    background-color: var(--bg-primary);
}

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

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

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

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

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

/* Spacing */
.p-sm {
    padding: var(--spacing-sm);
}

.p-md {
    padding: var(--spacing-md);
}

.p-lg {
    padding: var(--spacing-lg);
}

.p-xl {
    padding: var(--spacing-xl);
}

.m-sm {
    margin: var(--spacing-sm);
}

.m-md {
    margin: var(--spacing-md);
}

.m-lg {
    margin: var(--spacing-lg);
}

.m-xl {
    margin: var(--spacing-xl);
}

/* Border Radius */
.rounded-sm {
    border-radius: var(--radius-sm);
}

.rounded-md {
    border-radius: var(--radius-md);
}

.rounded-lg {
    border-radius: var(--radius-lg);
}

.rounded-xl {
    border-radius: var(--radius-xl);
}

.rounded-2xl {
    border-radius: var(--radius-2xl);
}

.rounded-full {
    border-radius: var(--radius-full);
}

/* Shadows */
.shadow-xs {
    box-shadow: var(--shadow-xs);
}

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

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

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

/* ========================================== */
/* RESET DEFAULTS */
/* ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: var(--font-family-body);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: var(--line-height-normal);
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-base),
                color var(--transition-base);
}

/* Prevent horizontal scroll */
body {
    overflow-x: hidden;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary-orange);
    outline-offset: 2px;
}