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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f0f8f7 0%, #e0eeec 100%);
    min-height: 100vh;
    color: #1f6a6e;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #1f6a6e, #4a9b9f);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1rem;
    opacity: 0.8;
    font-style: italic;
}

.app-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    flex: 1;
}

.canvas-container {
    position: relative;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(31, 106, 110, 0.15);
    overflow: hidden;
    background: white;
}

#canvas {
    display: block;
    border-radius: 12px;
    cursor: crosshair;
}

.counter-display {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 16px;
    border-radius: 20px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    font-weight: bold;
    color: #1f6a6e;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(31, 106, 110, 0.2);
}

.controls {
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(31, 106, 110, 0.1);
    width: 100%;
    max-width: 500px;
}

.main-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn.primary {
    background: linear-gradient(135deg, #1f6a6e, #4a9b9f);
    color: white;
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(31, 106, 110, 0.3);
}

.btn.secondary {
    background: #f0f8f7;
    color: #1f6a6e;
    border: 2px solid #1f6a6e;
}

.btn.secondary:hover {
    background: #1f6a6e;
    color: white;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.speed-control label {
    font-weight: 600;
    color: #1f6a6e;
}

#speedSlider {
    width: 80px;
}

#speedValue {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: #4a9b9f;
    min-width: 40px;
}

.advanced-controls {
    border-top: 1px solid #e0eeec;
    padding-top: 20px;
}

.advanced-controls summary {
    font-weight: 600;
    color: #1f6a6e;
    cursor: pointer;
    padding: 10px 0;
    list-style: none;
    text-align: center;
}

.advanced-controls summary::-webkit-details-marker {
    display: none;
}

.advanced-controls summary::after {
    content: ' ▼';
    font-size: 0.8rem;
    opacity: 0.6;
}

.advanced-controls[open] summary::after {
    content: ' ▲';
}

.control-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 15px 0;
    gap: 15px;
}

.control-group label {
    font-weight: 600;
    color: #1f6a6e;
    min-width: 120px;
}

.control-group input[type="range"] {
    flex: 1;
    max-width: 150px;
}

.control-group select {
    padding: 5px 10px;
    border: 1px solid #4a9b9f;
    border-radius: 6px;
    background: white;
    color: #1f6a6e;
    font-size: 0.9rem;
}

.control-group span {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    color: #4a9b9f;
    min-width: 40px;
    text-align: right;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid rgba(31, 106, 110, 0.1);
}

footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

footer a {
    color: #1f6a6e;
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    color: #4a9b9f;
}

/* Mobile responsiveness */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .main-controls {
        flex-direction: column;
        gap: 10px;
    }
    
    .control-group {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .control-group label {
        min-width: auto;
        text-align: center;
    }
    
    .speed-control {
        flex-direction: column;
        gap: 8px;
    }
}

/* Smooth transitions */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: #e0eeec;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #1f6a6e;
    cursor: pointer;
    transition: background 0.3s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: #4a9b9f;
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #1f6a6e;
    cursor: pointer;
    border: none;
}