Debug and Fix CSS Grid Layout Issues

Systematically debug and fix CSS Grid issues:

Step 1: Basic Grid Setup Debugging

/* ❌ Common mistakes */
.grid-container {
    display: grid;
    /* Missing grid-template-columns */
    grid-template-rows: repeat(3, 1fr);
    gap: 20px;
}

/* ✅ Correct setup */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    grid-template-rows: auto;
    gap: 20px;
    padding: 20px;
}

Step 2: Grid Area Debugging

/* ❌ Problematic grid areas */
.layout {
    display: grid;
    grid-template-areas: 
        "header header header"
        "sidebar main main"
        "footer footer footer";
    /* Missing grid-template-columns definition */
}

/* ✅ Properly defined grid areas */
.layout {
    display: grid;
    grid-template-columns: 250px 1fr 1fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas: 
        "header header header"
        "sidebar main main"
        "footer footer footer";
    min-height: 100vh;
    gap: 20px;
}

.header { grid-area: header; }
.sidebar { grid-area: sidebar; }
.main { grid-area: main; }
.footer { grid-area: footer; }

Step 3: Responsive Grid Solutions

/* Mobile-first responsive grid */
.grid-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1rem;
}

/* Tablet */
@media (min-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        padding: 1.5rem;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .grid-container {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
        padding: 2rem;
        max-width: 1200px;
        margin: 0 auto;
    }
}

/* Responsive grid areas */
@media (max-width: 767px) {
    .layout {
        grid-template-areas: 
            "header"
            "main"
            "sidebar"
            "footer";
        grid-template-columns: 1fr;
    }
}

Step 4: Advanced Grid Debugging

/* Debug mode - visualize grid lines */
.grid-debug {
    background-image: 
        linear-gradient(rgba(255,0,0,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,0,0,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Grid item debugging */
.grid-item {
    border: 2px solid red; /* Temporary for debugging */
    background: rgba(0,255,0,0.1); /* See item boundaries */
}

/* Use Firefox Grid Inspector or Chrome DevTools */
/* Add these temporarily for debugging */
.grid-container * {
    outline: 1px solid rgba(255,0,0,0.3);
}

Step 5: Common Grid Fixes

/* Fix overlapping items */
.grid-item {
    /* Ensure items don't grow beyond their area */
    max-width: 100%;
    overflow: hidden;

    /* If using explicit positioning */
    grid-column: span 1; /* Don't span multiple columns unintentionally */
    grid-row: span 1;
}

/* Fix content overflow */
.grid-item-content {
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
}

/* Handle images in grid */
.grid-item img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* Prevent grid blowout */
.grid-container {
    overflow: hidden; /* Prevent horizontal scroll */
}