:root {
    --primary-color: #3a7bd5;
    --primary-dark: #2c5fb3;
    --secondary-color: #00d2ff;
    --success-color: #4CAF50;
    --error-color: #f44336;
    --warning-color: #FFC107;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --text-color: #333;
    --text-light: #f8f9fa;
    --border-radius: 12px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Courier New', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    height: 100%;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: var(--font-main);
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--light-color);
    height: 100%;
    overflow: hidden;
    touch-action: manipulation;
    overscroll-behavior: none;
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 13px;
    }
}