:root {
    --bg-dark: #0f1115;
    --bg-panel: #1a1d24;
    --text-primary: #e0e6ed;
    --text-secondary: #94a3b8;
    --accent-color: #00f0ff;
    /* Cyber blue */
    --accent-glow: rgba(0, 240, 255, 0.4);
    --string-color: #475569;
    --fret-color: #334155;
    --note-bg: #1e293b;
    --note-active-bg: #00f0ff;
    --note-active-text: #000;
    --font-family: 'Segoe UI', system-ui, sans-serif;
}

body.standard-tuning {
    --accent-color: #00ff9d;
    /* Mint Green for Standard Tuning */
    --accent-glow: rgba(0, 255, 157, 0.4);
    --note-active-bg: #00ff9d;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-family);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 1rem;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--fret-color);
}

.accent-text {
    color: var(--accent-color);
    text-shadow: 0 0 10px var(--accent-glow);
}

.mode-tabs {
    display: flex;
    gap: 1rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.view {
    display: none;
    flex: 1;
    flex-direction: column;
    gap: 2rem;
}

.view.active {
    display: flex;
}

.hud-panel {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    background: var(--bg-panel);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--fret-color);
}

.chord-display {
    min-width: 400px;
    /* Reserve space */
}

.chord-display h2 {
    font-size: 3rem;
    color: var(--accent-color);
    line-height: 1.2;
    text-shadow: 0 0 20px var(--accent-glow);
    white-space: nowrap;
    /* Prevent wrapping */
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 600px;
    height: 3.6rem;
    /* Fixed height for consistency */
}

@keyframes label-pop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }

    60% {
        transform: scale(1.15);
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: flex;
    gap: 0.5rem;
    justify-content: flex-start;
    /* Left align to stop jumping */
    min-height: 32px;
    /* Center the bubbles */
    align-items: center;
}

/* Prevent jump */
align-items: center;
}

.note-marker-small {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
    color: #000;
}

.action-btn {
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

.action-btn:hover {
    background: var(--accent-color);
    color: var(--note-active-text);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Fretboard Styles */
.fretboard-container-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    /* Center fretboard vertically in space */
    justify-content: center;
    overflow-x: auto;
    background: #00000030;
    border-radius: 12px;
    padding: 2rem;
}

.fretboard {
    display: flex;
    flex-direction: column;
    position: relative;
    width: 100%;
    min-width: 800px;
    /* This will be grid-based generated by JS usually, or flex */
    gap: 0;
    user-select: none;
}

.string-row {
    display: flex;
    align-items: center;
    height: 40px;
    /* Space between strings */
    position: relative;
}

/* The actual string line */
.string-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--string-color);
    z-index: 1;
    pointer-events: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* Thicker low strings */
.string-row:nth-child(6) .string-line {
    height: 4px;
}

.string-row:nth-child(5) .string-line {
    height: 3.5px;
}

.string-row:nth-child(4) .string-line {
    height: 3px;
}

.fret-cell {
    flex: 1;
    height: 100%;
    border-right: 4px solid var(--fret-color);
    /* The fret wire */
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    cursor: pointer;
}

/* Specific styling for the NUT (Fret 0) */
.fret-cell[data-f="0"] {
    flex: 0 0 60px;
    /* Nut width */
    border-right: 8px solid #64748b;
    /* Nut */
    background: linear-gradient(to right, rgba(0, 0, 0, 0.4), rgba(100, 116, 139, 0.2));
    box-shadow: 5px 0 10px rgba(0, 0, 0, 0.5);
}

/* Label for Nut Removed per request */
.fret-cell[data-f="0"]::after {
    display: none;
}


.note-marker {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--note-bg);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: bold;
    opacity: 0;
    /* Hidden by default */
    transform: scale(0.5);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

/* Hover effect to show phantom marker */
.fret-cell:hover .note-marker {
    opacity: 0.5;
    transform: scale(0.98);
}

.small-btn {
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.small-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
}

/* Active State */
.fret-cell.active .note-marker {
    opacity: 1;
    transform: scale(1.1);
    background: var(--accent-color);
    color: var(--note-active-text);
    box-shadow: 0 0 15px var(--accent-glow), 0 0 30px var(--accent-glow);
}

.fret-cell.active .note-marker.animate-label {
    animation: label-pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes root-pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }

    70% {
        transform: scale(1.1);
        box-shadow: 0 0 0 6px rgba(255, 255, 255, 0);
    }

    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
    }
}

/* Root Note Ring Indicator */
.note-marker.is-root {
    z-index: 100 !important;
    border: 2px solid #fff;
    /* Solid inner border */
    position: relative;
    /* Remove the old shadow to avoid conflict */
    box-shadow: 0 0 10px var(--accent-glow);
}

.note-marker.is-root::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    border: 2px solid var(--accent-color);
    animation: root-pulse 2s infinite;
    pointer-events: none;
    opacity: 0.8;
}

/* Inlay Markers (Dots) */
.has-inlay {
    background: rgba(255, 255, 255, 0.03);
    /* Slight highlight for whole cell */
}

.has-inlay::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    /* Larger */
    height: 20px;
    background: #475569;
    /* Lighter grey */
    border: 2px solid rgba(0, 0, 0, 0.5);
    /* Definition */
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.8;
    /* More visible */
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.5);
}

/* Double dot for 12th fret */
.fret-cell[data-f="12"].has-inlay::before {
    width: 24px;
    border-radius: 12px;
    /* Oval for double dot approx or just single large one */
    background: linear-gradient(90deg, #334155 40%, transparent 40%, transparent 60%, #334155 60%);
    width: 30px;
}

/* Fret numbers underneath */
.fret-number-labels {
    display: flex;
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    opacity: 0.5;
    padding-left: 64px;
    /* Offset for nut */
}

.fret-num {
    flex: 1;
    text-align: center;
}

/* HUD Controls Top (Label Toggles) */
.controls-top {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Bottom Controls (Below Fretboard) */
.controls-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-panel);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--fret-color);
    margin-top: 1rem;
    width: 100%;
}

.preset-finder {
    display: flex;
    gap: 8px;
    align-items: center;
}

.preset-select-small {
    padding: 8px 12px;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    min-width: 80px;
}

.preset-select-big {
    padding: 8px 12px;
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 6px;
    color: var(--accent-color);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    min-width: 150px;
    font-weight: 500;
}

/* Hover/Focus for Selects */
.preset-select-small:hover,
.preset-select-big:hover {
    border-color: var(--accent-color);
}

.preset-select-small:focus,
.preset-select-big:focus {
    box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
}

.control-group {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.shift-controls {
    display: flex;
    gap: 0.5rem;
    padding-left: 1rem;
    border-left: 1px solid var(--fret-color);
}

.action-btn {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    color: var(--accent-color);
    padding: 0.6rem 1.2rem;
}

.action-btn:hover {
    background: var(--accent-color);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

.preset-select {
    background: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--fret-color);
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-family: var(--font-family);
    cursor: pointer;
    outline: none;
    min-width: 150px;
}

.preset-select:focus {
    border-color: var(--accent-color);
}

/* Scrollbar styling for fretboard container */
.fretboard-container-wrapper::-webkit-scrollbar {
    height: 8px;
}

.fretboard-container-wrapper::-webkit-scrollbar-track {
    background: #0f1115;
    border-radius: 4px;
}

.fretboard-container-wrapper::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}

.fretboard-container-wrapper::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Progression Bar */
.progression-bar {
    background: var(--bg-panel);
    border-radius: 12px;
    padding: 1.5rem;
    min-height: 100px;
    display: flex;
    gap: 1rem;
    align-items: center;
    overflow-x: auto;
    border: 1px solid var(--fret-color);
    margin-top: 1rem;
}

.empty-state {
    color: var(--text-secondary);
    font-style: italic;
    width: 100%;
    text-align: center;
}

.progression-chord {
    background: var(--note-bg);
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    min-width: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid var(--fret-color);
    cursor: pointer;
    transition: all 0.2s;
}

.progression-chord:hover {
    border-color: var(--accent-color);
    background: rgba(0, 240, 255, 0.05);
}

.progression-chord h4 {
    color: var(--text-primary);
    margin-bottom: 0.2rem;
    font-size: 1rem;
}

.progression-chord span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Functional Harmony Map Styles */
.geometry-layout {
    display: flex;
    gap: 2rem;
    height: 100%;
}

.panel {
    background: var(--bg-panel);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--fret-color);
}

.circle-panel {
    flex: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 400px;
}

.circle-container {
    width: 100%;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 2rem;
}

.harmony-map {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.cof-svg {
    width: 100%;
    height: 100%;
    max-width: 500px;
}

.cof-segment {
    transition: all 0.3s ease;
    cursor: default;
}

/* Key Nodes */
.key-node {
    fill: var(--bg-dark);
    stroke: var(--fret-color);
    stroke-width: 2px;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.major-node {
    r: 24;
}

.minor-node {
    r: 18;
}

/* Labels */
.key-label {
    fill: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
    transition: fill 0.3s;
}

.minor-label {
    font-size: 12px;
    fill: #64748b;
}

/* Active / Related States */
.key-node.active {
    fill: rgba(0, 240, 255, 0.2);
    stroke: var(--accent-color);
    stroke-width: 3px;
    filter: url(#glow-blur);
}

.key-node.related {
    fill: rgba(255, 255, 255, 0.05);
    stroke: var(--text-secondary);
    stroke-width: 2px;
}

.key-node.key-center {
    stroke: var(--text-primary) !important;
    stroke-width: 3px !important;
    stroke-dasharray: 4 2;
}

.progression-path {
    filter: drop-shadow(0 0 5px var(--accent-glow));
    pointer-events: none;
    transition: all 0.5s ease;
}

.cof-segment:hover .key-node {
    stroke: var(--text-primary);
}

/* Text Active States */
.cof-segment:has(.key-node.active) .key-label {
    fill: #fff;
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Center Label */
.center-label {
    fill: var(--accent-color);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 2px;
    opacity: 0.8;
}

/* Standard Tuning Override for CoF */
body.standard-tuning .key-node.active {
    fill: rgba(0, 255, 157, 0.2);
}

/* Roman Numeral Text */
.roman-large {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent-color);
    display: block;
    line-height: 1;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 20px var(--accent-glow);
}

.key-context {
    font-size: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.chord-card {
    background: var(--note-bg);
    border: 2px solid var(--fret-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.chord-card .degree {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.chord-card .chord-name {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 600;
}

.chord-card.active-chord {
    border-color: var(--accent-color);
    background: rgba(0, 240, 255, 0.1);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    transform: translateY(-5px);
}

.chord-card.active-chord .degree {
    color: var(--accent-color);
    opacity: 1;
    text-shadow: 0 0 10px var(--accent-glow);
}

.chord-card:hover {
    border-color: #64748b;
    transform: translateY(-2px);
}

.analysis-panel {
    flex: 1;
}

.panel h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--fret-color);
    padding-bottom: 0.5rem;
}

/* Tuning Controls */
.tuning-ctrl {
    display: flex;
    flex-direction: row;
    /* Row layout now */
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    min-width: 60px;
    /* Wider to accommodate buttons + text */
    gap: 8px;
    z-index: 10;
}

.tuning-btn-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.title-tuning {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.tune-btn {
    background: #1e293b;
    border: 1px solid #334155;
    color: var(--text-secondary);
    width: 24px;
    /* Larger width */
    height: 20px;
    /* Larger height */
    line-height: 1;
    font-size: 14px;
    /* Larger font */
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: all 0.1s;
}

.tune-btn:hover {
    background: var(--accent-color);
    color: #000;
    border-color: var(--accent-color);
}

.tuning-note {
    font-weight: 700;
    font-size: 1.2rem;
    /* Even Larger for visibility */
    color: var(--accent-color);
    margin: 0;
    /* More spacing */
    text-shadow: 0 0 5px var(--accent-glow);
    min-width: 25px;
    text-align: center;
}

/* Adjust String Line Z-index or margin */
.string-row {
    margin-left: 0;
    /* Align left */
}

/* Nut adjustment for 7 string might be automatic flex */
/* Ensure fretboard containers scroll nicely */
.fretboard-container-wrapper {
    justify-content: flex-start;
    /* Allow scroll if needed */
}

.fretboard {
    min-width: 900px;
    padding-left: 20px;
}