body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    margin: 0;
    padding: 10px;
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
    min-height: 100vh;
}

@media (max-width: 768px) {
    body {
        padding: 5px;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

@media (max-width: 768px) {
    .container {
        border-radius: 10px;
        padding: 15px;
        margin: 0 5px;
    }
}

h1 {
    color: #2d3748;
    text-align: center;
    margin: 0 0 15px 0;
    font-size: clamp(1.2rem, 5vw, 2.5rem);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    line-height: 1.2;
}

@media (max-width: 768px) {
    h1 {
        margin: 0 0 10px 0;
    }
}

.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 25px;
    margin-bottom: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
}

@media (max-width: 768px) {
    .controls {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 10px;
        padding: 12px;
        margin-top: 20px;
        margin-bottom: 15px;
    }
}

.control-group {
    display: flex;
    flex-direction: column;
}

label {
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 5px;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input, select {
    padding: 10px;
    border: 2px solid #cbd5e0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
}

input:focus, select:focus {
    outline: none;
    border-color: #850011;
    box-shadow: 0 0 0 3px rgba(133, 0, 17, 0.1);
}

button {
    background: linear-gradient(135deg, #850011 0%, #a20015 100%);
    color: white;
    border: none;
    padding: clamp(8px, 2vw, 12px) clamp(12px, 4vw, 24px);
    border-radius: 8px;
    font-size: clamp(12px, 3vw, 16px);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(133, 0, 17, 0.3);
    white-space: nowrap;
    min-width: fit-content;
}

button i {
    display: inline-block;
    width: 1em;
    text-align: center;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(133, 0, 17, 0.4);
}

button:active {
    transform: translateY(0);
}

.canvas-container {
    background: white;
    border-radius: 15px;
    padding: 15px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
    position: relative;
    overflow: hidden;
}

@media (max-width: 768px) {
    .canvas-container {
        padding: 10px;
        border-radius: 10px;
    }
}

canvas {
    display: block;
    margin: 0 auto;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: linear-gradient(to bottom, #f8f9fa, #ffffff);
    max-width: 100%;
    height: auto;
    /* Improve touch interaction */
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -webkit-tap-highlight-color: transparent;
}

@media (max-width: 768px) {
    canvas {
        border: 1px solid #e2e8f0;
        border-radius: 5px;
    }
}

.info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-top: 15px;
    padding: 12px;
    background: #f7fafc;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

@media (max-width: 768px) {
    .info {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 8px;
        margin-top: 10px;
        padding: 10px;
    }
}

.info-item {
    text-align: center;
    padding: 8px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

@media (max-width: 768px) {
    .info-item {
        padding: 6px;
    }
}

.info-label {
    font-size: 0.85em;
    color: #718096;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1.5em;
    font-weight: bold;
    color: #2d3748;
}


.play-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    align-items: center;
    margin-top: 15px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .play-controls {
        margin-top: 10px;
        gap: 8px;
        flex-direction: column;
        align-items: center;
    }

    .play-controls .button-row {
        display: flex;
        gap: 8px;
        order: 1;
    }

    .bpm-control {
        order: 2;
        margin-top: 8px;
    }

    /* Hide button text on mobile, keep only symbols */
    #stepBackBtn .btn-text,
    #playPauseBtn .btn-text,
    #resetBtn .btn-text,
    #stepForwardBtn .btn-text {
        display: none;
    }
}

.bpm-control {
    display: flex;
    align-items: center;
    gap: 5px;
}

.bpm-control label {
    font-size: clamp(12px, 3vw, 14px);
    color: #4a5568;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
}

.bpm-control input {
    width: clamp(50px, 12vw, 70px);
    padding: clamp(6px, 1.5vw, 8px);
    font-size: clamp(12px, 3vw, 14px);
}

.legend {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 12px;
    padding: 8px;
    background: #f7fafc;
    border-radius: 8px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .legend {
        gap: 10px;
        margin-top: 10px;
        padding: 6px;
    }
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 3px;
    border: 1px solid #2d3748;
}