Padding and Margin Longhand

CSS provides both shorthand and longhand syntax for padding and margin. Understanding both helps you write cleaner, more maintainable CSS.

Longhand Properties

/* Longhand — explicit and clear */
.box {
    margin-top: 10px;
    margin-right: 20px;
    margin-bottom: 10px;
    margin-left: 20px;

    padding-top: 1rem;
    padding-right: 1.5rem;
    padding-bottom: 1rem;
    padding-left: 1.5rem;
}

Shorthand Patterns

/* 1 value: all sides */
margin: 10px;               /* T=10, R=10, B=10, L=10 */

/* 2 values: vertical | horizontal */
margin: 10px 20px;          /* T=10, R=20, B=10, L=20 */

/* 3 values: top | horizontal | bottom */
margin: 10px 20px 30px;     /* T=10, R=20, B=30, L=20 */

/* 4 values: top | right | bottom | left (clockwise) */
margin: 10px 20px 30px 40px;

When to Use Which

• Shorthand — when setting all or most sides at once
• Longhand — when only changing one side, or for clarity

/* Good: shorthand for setting all sides */
.card { padding: 1.5rem; }

/* Good: longhand to override just one side */
.card-compact { padding-top: 0.75rem; }

/* Avoid: shorthand that resets other values unintentionally */
.card { padding: 1.5rem; }
.card { padding: 0.5rem 1.5rem; } /* Oops — changed top and bottom! */

Tip: The Clockwise Mnemonic

Think of a clock: Top → Right → Bottom → Left (TRouBLe).