.container {
    display: flex;
    flex-direction: column;
    width: 100%;
    min-height: 100vh;
}

.main-container {
    max-width: 1600px;
    margin: 9rem auto 3rem; /* Increased top margin for gap */
    padding: 0 2rem;
    display: flex;
    gap: 20px;
}

/* Left sidebar - Controls */
.controls-sidebar {
    width: 25%;
    position: sticky;
    top: 9rem; /* Match the increased margin */
    align-self: flex-start;
}

.controls-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 20px;
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.controls-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(0, 242, 255, 0.05), rgba(138, 43, 226, 0.05));
    z-index: -1;
}

.control-section {
    margin-bottom: 15px;
}

.control-section h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
    background: linear-gradient(45deg, var(--accent), var(--accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.toggle-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--medium-gray);
    transition: .4s;
    border-radius: 34px;
    border: 1px solid var(--glass-border);
}

.slider:before {
    content: "";
    position: absolute;
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 3px;
    background-color: var(--text);
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(45deg, var(--accent), var(--accent-alt));
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.operation-inputs {
    display: grid;
    gap: 15px;
    margin-bottom: 15px;
}

.input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.action-buttons, .utility-buttons {
    display: grid;
    gap: 10px;
}

.action-buttons {
    grid-template-columns: 1fr 1fr;
}

.explanation-compact {
    margin-top: 20px;
    font-size: 0.9rem;
}

.explanation-compact h4 {
    background: linear-gradient(45deg, var(--accent), var(--accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 10px 0 5px;
}

.explanation-compact p {
    color: var(--text-secondary);
    margin: 5px 0;
    font-size: 0.85rem;
}

/* Right content area - Visualization */
.visualization-area {
    width: 75%;
}

.structure-title {
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(45deg, var(--accent), var(--accent-alt));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.canvas-container {
    width: 100%;
    height: 700px;
    border-radius: 16px;
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    margin-bottom: 20px;
    position: relative;
}

.array-representation {
    width: 100%;
    padding: 20px;
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
}

.array-representation h3 {
    margin-bottom: 1rem;
    color: var(--text);
    text-align: center;
}

.array-cells, .array-indices {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3px;
}

.array-cells {
    margin: 10px 0;
}

.array-cell {
    width: 40px;
    height: 40px;
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    background-color: var(--medium-gray);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.array-cell.filled {
    background: linear-gradient(45deg, rgba(0, 242, 255, 0.3), rgba(138, 43, 226, 0.3));
    border-color: var(--accent);
}

.array-index {
    width: 40px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.array-pointers {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    color: var(--text-secondary);
}

button {
    padding: 10px 16px;
    background: linear-gradient(45deg, var(--accent), var(--accent-alt));
    color: var(--black);
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    width: 100%;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, var(--accent-alt), var(--accent));
    border-radius: 30px;
    z-index: -1;
    transition: opacity 0.3s ease;
    opacity: 0;
}

button:hover::before {
    opacity: 1;
}

input {
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text);
    width: 100%;
    transition: all 0.3s ease;
}

input:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 10px rgba(0, 242, 255, 0.3);
}

@media (max-width: 1024px) {
    .main-container {
        flex-direction: column;
    }
    
    .controls-sidebar, .visualization-area {
        width: 100%;
    }
    
    .controls-sidebar {
        position: relative;
        top: 0;
    }
}