/* Base styles for responsive design */
:root {
    /* Color scheme */
    --primary-bg: #ffffff;
    --secondary-bg: #f8f9fa;
    --text-primary: #111111;
    --text-secondary: #666666;
    --accent-green: #22c55e;
    --accent-red: #ef4444;
    --border-color: #e5e7eb;
    
    /* Typography */
    --font-family: 'Lexend', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Breakpoints for responsive design */
    --mobile-max: 767px;
    --tablet-min: 768px;
    --desktop-min: 1024px;
    --large-desktop-min: 1440px;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Mobile-first responsive design */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Touch-friendly button sizing for mobile */
button {
    min-height: 44px;
    min-width: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 4px;
    background-color: var(--secondary-bg);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

button:hover {
    opacity: 0.8;
}

button:focus {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
}

/* Input styling */
input {
    min-height: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: var(--font-size-base);
}

input:focus {
    outline: 2px solid var(--accent-green);
    outline-offset: 2px;
    border-color: var(--accent-green);
}

/* Responsive breakpoints */
@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* Landscape orientation optimization for mobile */
@media (orientation: landscape) and (max-height: 500px) {
    body {
        font-size: var(--font-size-sm);
    }
    
    button {
        min-height: 36px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    input {
        min-height: 36px;
    }
}