:root {
    /* Primary Brand Colors */
    --color-primary: #f6a623;
    --color-secondary: #e67e22;
    --color-light-accent: #ffeaa7;
    
    /* Neutral Colors */
    --color-text-dark: #2c3e50;
    --color-text-medium: #7f8c8d;
    --color-background-light: #ecf0f1;
    --color-paper: #faf9f7;
    --color-white: #ffffff;
    --color-background-code: #dae0ef;
    --color-icon-bg: rgb(254, 242, 237);
    
    /* Button State Colors */
    --color-primary-active: #d46a1a;
    --color-destructive: #e74c3c;
    --color-destructive-hover: #c0392b;
    --color-destructive-active: #a93226;
    --color-focus-ring: rgba(246, 166, 35, 0.1);
    
    /* Alert Colors */
    --color-success-bg: #d4edda;
    --color-success-border: #28a745;
    --color-success-text: #155724;
    --color-warning-bg: #fff3cd;
    --color-warning-border: #ffc107;
    --color-warning-text: #856404;
    --color-error-bg: #f8d7da;
    --color-error-border: #dc3545;
    --color-error-text: #721c24;
    --color-info-bg: #d1ecf1;
    --color-info-border: #17a2b8;
    --color-info-text: #0c5460;

    
    /* Spacing Scale (8px base) */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Typography */
    --font-family-primary: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;
    --font-size-5xl: 72px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Elevation (Shadows) */
    --elevation-1: 0 1px 3px rgba(0, 0, 0, 0.08);
    --elevation-2: 0 2px 8px rgba(0, 0, 0, 0.1);
    --elevation-3: 0 4px 15px rgba(0, 0, 0, 0.15);
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 250ms ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.brand-logo {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    margin-bottom: var(--spacing-2xl);
}

header h1 {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
    align-items: center;
}

header h1 .brand-logo {
    max-width: 300px;
    height: auto;
    display: block;
}

header p {
    font-size: var(--font-size-lg);
    opacity: 0.95;
}

section {
    margin-bottom: 80px;
}

h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
    border-bottom: 3px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
}

h3 {
    font-size: var(--font-size-2xl);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
    color: var(--color-business);
}

h4 {
    font-size: var(--font-size-xl);
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    color: var(--color-text-medium);
}

p {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
}

.intro-box {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-2);
    margin-bottom: var(--spacing-lg);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 30px 0;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 30px 0;
}

/* Responsive grid breakpoints */
@media (max-width: 1024px) {
    .grid-2,
    .do-dont-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 900px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--elevation-1);
}

.card h4 {
    margin-top: 0;
    color: var(--color-secondary);
}

.symbol-showcase {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--elevation-2);
    margin: var(--spacing-md) 0;
}

.color-swatch {
    display: inline-block;
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    margin: var(--spacing-sm);
    box-shadow: var(--elevation-1);
    position: relative;
}

.color-info {
    text-align: center;
    margin-top: 10px;
    font-size: 0.9em;
}

.color-name {
    font-weight: bold;
    color: var(--color-text-dark);
}

.color-hex {
    font-family: 'Courier New', monospace;
    color: var(--color-text-medium);
    font-size: 0.85em;
}

.comparison-table {
    width: 100%;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--elevation-2);
    margin: var(--spacing-md) 0;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th {
    background: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-background-light);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.do-dont-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 30px 0;
}

.do-box {
    background: #d4edda;
    border-left: 5px solid #28a745;
    padding: 20px;
    border-radius: 8px;
}

.do-box h4 {
    color: #155724;
    margin-bottom: 15px;
}

.dont-box {
    background: #f8d7da;
    border-left: 5px solid #dc3545;
    padding: 20px;
    border-radius: 8px;
}

.dont-box h4 {
    color: #721c24;
    margin-bottom: 15px;
}

ul {
    margin-left: 25px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
}

.tagline-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: var(--spacing-lg) 0;
    box-shadow: var(--elevation-3);
}

.usage-example {
    background: var(--color-background-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
    border-left: 4px solid var(--color-secondary);
}

code {
    background: var(--color-background-code);
    display: inline-block;
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    font-family: 'Andale Mono', monospace;
    font-size: var(--font-size-sm);
}

.emphasis {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}

.critical-note {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
    color: #721c24;
}

@media (max-width: 768px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: var(--font-size-3xl);
    }
    
    h2 {
        font-size: var(--font-size-3xl);
    }
    
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    body {
        font-size: var(--font-size-sm);
    }
}

/* Very small mobile devices */
@media (max-width: 480px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .grid-2,
    .grid-3 {
        gap: 20px;
    }
    
    .do-dont-grid {
        gap: 20px;
    }
    
    .intro-box,
    .card {
        padding: var(--spacing-md);
    }
}

/* Small tablets and phones in landscape */
@media (min-width: 481px) and (max-width: 768px) {
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .grid-2 {
        gap: 25px;
    }
    
    .grid-3 {
        gap: 20px;
    }
}

/* Tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .grid-2 {
        gap: 30px;
    }
    
    .grid-3 {
        gap: 25px;
    }
}