* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: #000000; /* Pure Black */
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.app-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background: #0a0a0a;
    border-bottom: 1px solid #222;
}

.brand {
    font-weight: bold;
    color: #007acc;
    letter-spacing: 1px;
}

.controls {
    display: flex;
    gap: 10px;
}

input {
    background: #111;
    border: 1px solid #333;
    color: #fff;
    padding: 8px 15px;
    border-radius: 4px;
    outline: none;
}

button {
    padding: 8px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s;
    border: none;
}

.btn-insert { background: #007acc; color: white; }
.btn-insert:hover { background: #005f9e; }

.btn-clear { background: transparent; border: 1px solid #333; color: #ff4d4d; }
.btn-clear:hover { background: #ff4d4d; color: white; }

#canvasContainer { flex: 1; background: #000; }
canvas { display: block; width: 100%; height: 100%; }