:root {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --primary-color: #38bdf8;
    --text-color: #f1f5f9;
    --accent-color: #fb7185;
    --border-color: #334155;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background-color: var(--surface-color);
    padding: 0.75rem 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

h1 { 
    margin: 0; 
    font-size: 1.25rem; 
    font-weight: 500; 
    letter-spacing: -0.025em;
    color: var(--primary-color);
}

.controls { display: flex; gap: 0.75rem; align-items: center; }

button {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-weight: 500;
    font-size: 0.8rem;
}

button:hover { 
    border-color: var(--primary-color);
    background: rgba(56, 189, 248, 0.05);
}

button.primary { 
    background: var(--primary-color); 
    color: var(--bg-color); 
    border-color: var(--primary-color);
}

button.primary:hover { 
    background: #7dd3fc; 
    border-color: #7dd3fc;
}

.slider-group { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    font-size: 0.75rem; 
    color: #94a3b8;
}

input[type=range] {
    cursor: pointer;
    accent-color: var(--primary-color);
}

main { 
    flex: 1; 
    position: relative; 
    cursor: crosshair; 
    background-image: 
        radial-gradient(circle at 1px 1px, #1e293b 1px, transparent 0);
    background-size: 40px 40px;
}

canvas { 
    display: block; 
    width: 100%; 
    height: 100%; 
}

.stats { 
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.75rem; 
    color: var(--accent-color);
    background: rgba(0,0,0,0.2);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}