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The !important flag bypasses all specificity rules. Use it sparingly, as it breaks the natural flow of the cascade and makes debugging difficult. Master the Box Model

See how clean that is? No hacks, no floats, no !important . Just the cascade, box model, grid, and a media query. You can write this. CSS Demystified Start writing CSS with confidence

/* Mobile-first approach: base styles for smallest screens */ .container display: block; no !important . Just the cascade

<header class="site-header"> <h1 class="logo">Site</h1> <nav class="nav">...</nav> </header> <main class="content"> <section class="grid">...</section> </main> .cards-grid display: grid

.cards-grid display: grid; gap: 1.5rem; /* mobile: single column */ grid-template-columns: 1fr;