body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background: url('https://www.transparenttextures.com/patterns/diamond-upholstery.png'), linear-gradient(to bottom, #1e3c72, #2a5298);
    color: #f5f5f5;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    background: url('https://www.transparenttextures.com/patterns/diamond-upholstery.png'), linear-gradient(to bottom, #1e3c72, #2a5298);
    color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #330808;
    text-align: center;
    margin-bottom: 20px;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px;
    background-color: #f0f0f0;
    border-radius: 5px;
    justify-content: space-between;
}

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

.instructions {
    background-color: #abd2f6;
    padding: 10px;
    border-left: 5px solid #1795fc;
    font-size: 14px;
    margin-left: auto;
}

button {
    padding: 8px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

#pushBtn, #peekBtn {
    background-color: #4CAF50;
    color: white;
}

#popBtn {
    background-color: #f44336;
    color: white;
}

#clearBtn {
    background-color: #ff9800;
    color: white;
}

button:hover {
    opacity: 0.9;
}

button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

#pushValue {
    width: 60px;
}

.canvas-container {
    display: flex;
    justify-content: center;
    margin: 20px 0;
    overflow: auto;
    min-height: 300px;
    border: 1px solid #ddd;
    background-color: white;
    padding: 20px;
}

canvas {
    background-color: rgb(255, 255, 255);
    margin: 0 auto;
}

.status {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #e7f3fe;
    border-left: 5px solid #2196F3;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 4px;
}

.status::before {
    content: "ℹ️";
    font-size: 18px;
}

.status.error {
    background-color: #fdb2bf;
    border-left-color: #f44336;
}

.status.error::before {
    content: "⚠️";
}

.status.success {
    background-color: #aeffb5;
    border-left-color: #4CAF50;
}

.status.success::before {
    content: "✅";
}