/* --- Basic Reset & Mobile First Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-sans-serif);
    line-height: 1.6;
    background-color: var(--body-bg);
    color: var(--text-color);
    font-size: 16px;
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    font-size: 1.7rem;
    font-weight: 700;
}

h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.4rem;
    font-weight: 600;
}

/* Utility Classes */
.hidden {
    display: none !important;
}