/* ============================================
   Reset & Base Styles (Mobile-First)
   ============================================ */
html,
body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    touch-action: manipulation;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    padding: var(--spacing-sm);
    font-size: 16px;
    overflow-x: hidden;
}

/* Typography */
h1 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.8em;
    font-weight: 700;
}

h2 {
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm) 0;
    font-size: 1.4em;
    font-weight: 600;
}

h3 {
    color: var(--text-secondary);
    margin: var(--spacing-md) 0 var(--spacing-sm) 0;
    font-size: 1.1em;
    font-weight: 600;
}

/* Tablet Typography */
@media (min-width: 481px) {
    body {
        padding: var(--spacing-md);
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.6em;
    }

    h3 {
        font-size: 1.2em;
    }
}

/* Desktop Typography */
@media (min-width: 769px) {
    body {
        padding: var(--spacing-lg);
    }

    h1 {
        font-size: 2.5em;
    }

    h2 {
        font-size: 1.8em;
    }

    h3 {
        font-size: 1.3em;
    }
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-xs);
    }
}