/* Phase 2: Layout Evolution Styles */

/* Flexbox Playground */
.flex-playground {
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-secondary);
    overflow: hidden;
    margin-top: var(--space-8);
}

.flex-controls {
    padding: var(--space-4);
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.control-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.select-wrapper select {
    padding: var(--space-2);
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.flex-container {
    display: flex;
    min-height: 300px;
    padding: var(--space-4);
    background: #000;
    background-image: radial-gradient(var(--border) 1px, transparent 1px);
    background-size: 20px 20px;
    transition: all 0.3s ease;
    gap: var(--space-4);
}

.flex-item {
    width: 80px;
    height: 80px;
    background: var(--accent);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    border-radius: 6px;
    box-shadow: 0 4px 12px var(--accent-glow);
    transition: all 0.3s ease;
}

.flex-item:nth-child(2) {
    background: var(--success);
}

.flex-item:nth-child(3) {
    background: #a855f7;
}

/* Purple */

/* Grid Visualizer */
.grid-visualizer {
    display: grid;
    grid-template-areas:
        "header header header"
        "sidebar main main"
        "footer footer footer";
    grid-template-columns: 200px 1fr 1fr;
    grid-template-rows: auto 1fr auto;
    gap: var(--space-4);
    min-height: 400px;
    margin-top: var(--space-8);
}

@media (max-width: 768px) {
    .grid-visualizer {
        grid-template-areas:
            "header"
            "sidebar"
            "main"
            "footer";
        grid-template-columns: 1fr;
        grid-template-rows: auto auto 1fr auto;
    }
}

.grid-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    padding: var(--space-4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    border-radius: 8px;
}

.grid-header {
    grid-area: header;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    border-color: rgba(56, 189, 248, 0.3);
}

.grid-sidebar {
    grid-area: sidebar;
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.3);
}

.grid-main {
    grid-area: main;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.3);
}

.grid-footer {
    grid-area: footer;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
    border-color: rgba(148, 163, 184, 0.3);
}

/* Ultimate Centering */
.centering-comparison {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-top: var(--space-8);
}

@media (min-width: 768px) {
    .centering-comparison {
        grid-template-columns: 1fr 1fr;
    }
}

.center-box {
    height: 150px;
    background: #000;
    border-radius: 8px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Old Way (Absolute + Transform) */
.old-way-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: var(--space-4);
    background: var(--danger);
    color: white;
    border-radius: 6px;
    text-align: center;
    font-weight: bold;
}

/* New Way (Grid Center) */
.modern-way-center {
    display: grid;
    place-items: center;
    height: 100%;
}

.centered-content {
    padding: var(--space-4);
    background: var(--success);
    color: var(--bg-primary);
    border-radius: 6px;
    text-align: center;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
    animation: float 3s ease-in-out infinite;
}