@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700&family=Outfit:wght@200;400;500;600;700&display=swap');

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

body {
    font-family: 'Fraunces', serif;
    background: #09090b;
    padding: 24px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    background: #1a1a1c;
    border-radius: 20px;
    box-shadow: 
        0 1px 2px rgba(0, 0, 0, 0.3),
        0 4px 8px rgba(0, 0, 0, 0.2),
        0 16px 32px rgba(0, 0, 0, 0.15),
        0 0 40px rgba(255, 255, 255, 0.03);
    padding: 32px;
    max-width: 680px;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

h1 {
    text-align: center;
    color: #ffffff;
    margin-bottom: 24px;
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.view-toggle {
    display: flex;
    justify-content: center;
    margin-bottom: 32px;
    gap: 0;
    background: linear-gradient(135deg, #1a1a1c 0%, #2a2a2c 100%);
    padding: 4px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.toggle-btn {
    flex: 1;
    padding: 10px 24px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.5);
    font-family: 'Fraunces', serif;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    border-radius: 12px;
    letter-spacing: 0.2px;
}

.toggle-btn:hover {
    color: rgba(255, 255, 255, 0.75);
}

.toggle-btn.active {
    background: linear-gradient(135deg, #3a3a3c 0%, #2a2a2c 100%);
    color: #ffffff;
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.scale-title {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
    text-align: center;
    font-weight: 500;
    letter-spacing: 0.3px;
}

.piano-roll-container {
    display: flex;
    align-items: flex-start;
    height: 180px;
    margin: 20px auto;
    border: 1px solid #ccc;
    max-width: 800px;
}

.chord-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-bottom: 24px;
}

.chord-box {
    border-radius: 10px;
    padding: 14px 4px;
    text-align: center;
    box-shadow: 
        0 1px 2px rgba(0, 0, 0, 0.4),
        0 2px 8px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.5);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.chord-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.15);
}

.chord-box:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        0 8px 16px rgba(0, 0, 0, 0.3),
        0 16px 32px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.chord-box:active {
    transform: translateY(-1px) scale(1.0);
    transition: all 0.1s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.major {
    background: linear-gradient(135deg, rgb(37, 49, 56) 0%, rgb(41, 88, 115) 35%, rgb(57, 219, 244) 74%, rgb(251, 255, 255) 100%);
    color: rgba(24, 24, 24, 0.95);
}

.minor {
    background: linear-gradient(135deg, rgb(212, 162, 127) 0%, rgb(217, 119, 87) 100%);
    color: rgba(24, 24, 24, 0.95);
}

.diminished {
    background: linear-gradient(135deg, rgb(112, 112, 112) 0%, rgb(158, 158, 158) 100%);
    color: rgba(255, 255, 255, 0.95);
}

.augmented {
    background: linear-gradient(135deg, rgb(210, 180, 160) 0%, rgb(220, 195, 175) 100%);
    color: rgba(24, 24, 24, 0.95);
}

.numeral {
    font-size: 16px;
    font-weight: 600;
    font-style: italic;
    margin-bottom: 4px;
    letter-spacing: 0.3px;
}

.chord-name {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2px;
    opacity: 0.9;
}

.circle-section {
    margin-top: 48px;
    text-align: center;
}

.circle-container {
    position: relative;
    width: 380px;
    height: 380px;
    margin: 24px auto;
}

.circle-wheel {
    position: absolute;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.key-segment {
    position: absolute;
    left: 50%;
    top: 50%;
    transform-origin: center;
}

.segment-content {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 400;
    font-family: 'Outfit', sans-serif;
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, rgb(112, 112, 112) 0%, rgb(158, 158, 158) 100%);
    color: rgba(255, 255, 255, 0.5);
    font-size: 15px;
    letter-spacing: 0.3px;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    transform: translate(-50%, -50%);
}

.key-segment:hover .segment-content {
    background: linear-gradient(135deg, rgb(130, 130, 130) 0%, rgb(170, 170, 170) 100%);
    color: rgba(255, 255, 255, 0.7);
    transform: translate(-50%, -50%) scale(1.1);
}

.key-segment.active .segment-content {
    width: 80px;
    height: 80px;
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.5),
        0 8px 20px rgba(0, 0, 0, 0.4),
        0 0 0 3px rgba(255, 255, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    background: linear-gradient(135deg, rgb(37, 49, 56) 0%, rgb(41, 88, 115) 35%, rgb(57, 219, 244) 74%, rgb(251, 255, 255) 100%);
    color: rgba(24, 24, 24, 0.95);
    font-size: 18px;
    font-weight: 600;
}

.center-circle {
    position: absolute;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1a1a1c 0%, #2a2a2c 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.5),
        0 8px 16px rgba(0, 0, 0, 0.4),
        inset 0 1px 2px rgba(255, 255, 255, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.12);
    z-index: 10;
    font-size: 36px;
    font-weight: 400;
    color: #ffffff;
    letter-spacing: -0.5px;
    font-family: 'Outfit', sans-serif;
}

.position-marker {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 12px solid rgba(255, 255, 255, 0.4);
    z-index: 5;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 24px;
}

.nav-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: linear-gradient(135deg, #2a2a2c 0%, #1a1a1c 100%);
    color: #ffffff;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.3),
        0 4px 12px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: linear-gradient(135deg, #3a3a3c 0%, #2a2a2c 100%);
    transform: scale(1.08);
    box-shadow: 
        0 4px 8px rgba(0, 0, 0, 0.4),
        0 8px 16px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.nav-btn:active {
    transform: scale(0.98);
    transition: all 0.1s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.mode-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}

.mode-btn {
    padding: 10px 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: linear-gradient(135deg, #2a2a2c 0%, #1a1a1c 100%);
    color: rgba(255, 255, 255, 0.75);
    font-family: 'Fraunces', serif;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 
        0 1px 2px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.mode-btn:hover {
    background: linear-gradient(135deg, #3a3a3c 0%, #2a2a2c 100%);
    color: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        0 4px 8px rgba(0, 0, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.mode-btn:active {
    transform: translateY(0);
    transition: all 0.1s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.mode-btn.active {
    background: linear-gradient(135deg, #4a4a4c 0%, #3a3a3c 100%);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        0 4px 12px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.mode-btn.active:hover {
    transform: translateY(-2px);
}

#scalesContent, #harmoniesContent {
    display: none;
}

#scalesContent.active, #harmoniesContent.active {
    display: block;
}

@media (max-width: 480px) {
    body {
        padding: 16px;
    }
    
    .container {
        padding: 24px 16px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .circle-container {
        width: 320px;
        height: 320px;
    }
    
    .segment-content {
        width: 54px;
        height: 54px;
        font-size: 13px;
    }
    
    .key-segment.active .segment-content {
        width: 66px;
        height: 66px;
        font-size: 16px;
    }
    
    .center-circle {
        width: 110px;
        height: 110px;
        font-size: 28px;
    }
}


.scale-section {
    position: relative;
    padding-left: 0;
    margin-bottom: 24px;
}

.drag-handle {
    position: absolute;
    left: -24px;
    top: 50%;
    transform: translateY(10px);
    font-size: 18px;
    color: rgba(255, 255, 255, 0.3);
    cursor: grab;
    user-select: none;
    letter-spacing: -2px;
}

.drag-handle:active {
    cursor: grabbing;
}

.close-btn {
    position: absolute;
    right: -32px;
    top: 8px;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.4);
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
    transition: color 0.2s;
}

.close-btn:hover {
    color: rgba(255, 255, 255, 0.8);
}

.mode-btn.flash {
    animation: flashButton 0.6s ease-out;
}

@keyframes flashButton {
    0% {
        background: linear-gradient(135deg, rgb(37, 49, 56) 0%, rgb(41, 88, 115) 35%, rgb(57, 219, 244) 74%, rgb(251, 255, 255) 100%);
        transform: scale(1.05);
    }
    100% {
        background: linear-gradient(135deg, #2a2a2c 0%, #1a1a1c 100%);
        transform: scale(1);
    }
}