/* ===============================
  RESET & BASE STYLES
================================*/
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text-color);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal);
}

/* 📱 TYPOGRAPHY SCALE */
h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.1; }
h2 { font-size: clamp(2rem, 4vw, 2.5rem); font-weight: 700; }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; }
h4 { font-size: 1.25rem; font-weight: 600; color: var(--text-light);}
h5 { font-size: 1.1rem; font-weight: 600; }
h6 { font-size: 1rem; font-weight: 600; }

p { margin-bottom: 1rem; color: var(--text-light);}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-600);
}

.text-center { text-align: center; }
.text-accent { color: var(--accent-600); }