/* General page and body styling */
body {
    font-family: Arial, sans-serif;
    margin: 20px;
    background-color: #f9f9f9;
    color: #333;
}

/* Header */
.header-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    position: relative;
    gap: 15px;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin: 0;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative; /* <-- ADDED */
}

#help-button {
    background: none;
    border: 1px solid #ccc;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    color: #555;
    padding: 0;
    line-height: 1;
}

#view-toggle-btn {
    background: none;
    border: 1px solid #ccc;
    border-radius: 4px;
    width: 28px;
    height: 28px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    color: #555;
    padding: 0;
    line-height: 1;
}

#help-button:hover, #view-toggle-btn:hover {
    background-color: #e9e9e9;
}

/* Controls */
.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
    gap: 20px;
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    position: relative; /* For views menu positioning */
}

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

.control-group label {
    font-weight: bold;
    margin-bottom: 8px;
}

.control-group select, .control-group button {
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

#interval-select button {
     font-weight: bold;
}

.control-group button:hover, .control-group select:hover {
    background-color: #e9e9e9;
}

.control-group button.active, .view-btn.active {
    background-color: #3498db;
    color: white;
    border-color: #3498db;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.button-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
}

.button-grid button {
    margin: 0;
    width: 50px; 
    display: inline-flex; 
    justify-content: center;
    align-items: center;
}

/* Views Menu */
#views-menu {
    position: absolute;
    top: 100%;       /* <-- UPDATED */
    right: 0;        /* <-- UPDATED */
    margin-top: 8px; /* <-- UPDATED */
    z-index: 100;
    background-color: #fff;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: fit-content;
    white-space: nowrap;
    border: 1px solid #ddd;
}

#views-menu.hidden {
    display: none;
}

.view-option-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.view-option-row label {
    font-weight: bold;
    margin-right: 15px;
    margin-bottom: 0;
}

.view-option-row select {
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
}

.button-group {
    display: flex;
    gap: 5px;
}

.button-group button {
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    cursor: pointer;
}


/* Help Container */
#help-container {
    display: none;
    background-color: #fff;
    padding: 20px;
    margin: 0 auto 30px auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    max-width: 900px;
}

#help-container p, #help-container ul {
    font-size: 14px;
    line-height: 1.6;
}

#help-container ul {
    padding-left: 20px;
}

#help-container h3 {
    margin-top: 25px;
}

#help-container h4 {
    margin-top: 15px;
    margin-bottom: 5px;
}

#rules-description.hidden {
    display: none;
}

#toggle-rules-btn {
    display: block;
    margin: 25px auto 15px auto;
    width: 220px;
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: #f0f0f0;
    cursor: pointer;
}

/* --- Metronome --- */
.metronome-controls-main {
    display: flex;
    gap: 4px;
    align-items: center;
}
#metronome-play-btn, #metronome-settings-btn {
    width: 45px;
    height: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 18px;
    transition: background-color 0.1s ease-in-out, box-shadow 0.1s ease-in-out;
}
#metronome-play-btn svg {
    width: 100%;
    height: 100%;
    fill: #333;
}
#metronome-play-btn.downbeat-flash {
    background-color: #e74c3c88;
    box-shadow: 0 0 12px 2px #e74c3caa;
}
#metronome-play-btn.beat-flash {
    background-color: #3498db88;
    box-shadow: 0 0 12px 2px #3498dbaa;
}

/* --- Metronome Panel --- */
@keyframes pulse-animation {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

#metronome-panel {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    margin: -10px auto 20px auto;
    width: fit-content;
    overflow: hidden;
    border: 1px solid #eee;
    transition: all 0.3s ease-in-out;
}
#metronome-panel.hidden { display: none; }

.metronome-panel-content {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 40px;
    flex-wrap: wrap;
}

.metro-display-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

#metronome-panel #time-signature-select {
    width: 130px;
    margin-bottom: 2px;
    padding: 6px;
    border-radius: 4px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    text-align: center;
    font-weight: bold;
    cursor: pointer;
}

#metronome-button {
    width: 130px;
    height: 130px;
    border: 4px solid #eee;
    border-radius: 50%;
    background-color: #f9f9f9;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 0 1px #ccc, inset 0 3px 8px rgba(0,0,0,0.05);
    transition: background-color 0.1s;
}
#metronome-button.downbeat-flash {
    animation: pulse-animation 0.15s ease-out;
    background-color: #e74c3c30;
}
#metronome-button.beat-flash {
    animation: pulse-animation 0.15s ease-out;
    background-color: #3498db20;
}

#bpm-display {
    font-size: 2.8em;
    font-weight: bold;
    color: #333;
    line-height: 1;
}

.bpm-label {
    font-size: 0.9em;
    color: #555;
}

#beat-counter-display {
    font-size: 0.9em;
    min-height: 18px;
    color: #777;
}

.beat-indicators {
    display: flex;
    justify-content: center;
    height: 10px;
    gap: 8px;
}
.beat-dot {
    width: 10px;
    height: 10px;
    background-color: #ddd;
    border-radius: 50%;
    transition: all 0.1s;
}
.beat-dot.active { background-color: #3498db; }
.beat-dot.downbeat { background-color: #e74c3c; }


.metro-controls-section {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-width: 280px;
}
.tempo-group-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.sub-controls-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.metro-controls-section .metro-control-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.metro-controls-section label {
    font-size: 0.8em;
    font-weight: bold;
    color: #555;
    margin-bottom: 0;
}
.metro-controls-section select, 
.metro-controls-section input,
.metro-controls-section button {
    width: 100%;
    box-sizing: border-box;
}
.metro-controls-section select {
    padding: 6px;
}
.metro-controls-section button {
    padding: 6px;
}

.sound-octave-container {
    flex-direction: row !important;
    align-items: flex-end;
    gap: 20px !important;
    width: 100%;
    justify-content: center;
}
.sound-control-wrapper, .octave-control-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}
.sound-control-wrapper select {
    width: 140px;
}

.metro-button-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
}
.metro-button-group button {
    width: 28px;
    height: 28px;
    font-size: 1em;
    flex-shrink: 0;
    padding: 0;
}
.metro-button-group span {
    font-size: 1em;
    width: 20px;
    text-align: center;
}
#metronome-panel input[type="range"] {
    height: 6px;
    margin: 0;
}
#metronome-panel input[type="range"]::-webkit-slider-thumb {
    width: 16px;
    height: 16px;
}


/* Fretboard */
.fretboard-container {
    position: relative;
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 20px;
    padding-left: 55px;
    margin: 30px auto 20px auto;
    border-radius: 8px;
    width: fit-content;
}
.string-name-label {
    position: absolute; left: -25px; top: 50%;
    transform: translate(-50%, -50%);
    font-weight: bold; font-size: 14px; color: #555;
    cursor: pointer; transition: color 0.2s ease;
    z-index: 2; pointer-events: all;
}
#strings-and-frets {
    position: relative; border-left: 5px solid #333; /* The nut */
    height: 250px; display: flex; flex-direction: column;
    justify-content: space-between; padding: 25px 0;
    box-sizing: border-box; z-index: 1; 
}
.string {
    position: relative; background-color: #333;
    z-index: 1; cursor: pointer;
}
.string[data-string-number="1"] { height: 1.5px; } 
.string[data-string-number="2"] { height: 2px; }   
.string[data-string-number="3"] { height: 2.5px; } 
.string[data-string-number="4"] { height: 3px; }   
.string[data-string-number="5"] { height: 3.5px; } 
.string[data-string-number="6"] { height: 4px; }   
.string.cannot-deselect, .string-name-label.cannot-deselect { cursor: not-allowed; }
.fret {
    position: absolute; top: 0; bottom: 0;
    width: 2px; background-color: #333; z-index: 2; 
}
.fret-marker-container {
    position: absolute; top: 0; bottom: 0; left: 0; right: 0;
    z-index: 0; display: flex; justify-content: flex-start; pointer-events: none;
}
.fret-marker {
    position: absolute; width: 15px; height: 15px;
    background-color: #d3d3d3; border-radius: 50%;
    transform: translateX(-50%); top: 50%; margin-top: -7px;
}
.fret-marker-double-top, .fret-marker-double-bottom {
    position: absolute; width: 15px; height: 15px;
    background-color: #d3d3d3; border-radius: 50%;
    transform: translate(-50%, -50%);
}
.fret-marker-double-top { top: 34%; }
.fret-marker-double-bottom { top: 66%; }
.note {
    position: absolute; width: 30px; height: 30px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; font-size: 14px; cursor: pointer;
    box-shadow: 0 3px 6px rgba(0,0,0,0.3); z-index: 5; 
    transform: translate(-50%, -50%) translateX(6px);
    transition: background-color 0.3s, color 0.3s, opacity 0.3s;
}
#fret-number-row {
    display: flex; justify-content: flex-start;
    height: 25px; margin-top: 5px; position: relative;
}
.fret-number {
    position: absolute; font-size: 14px; color: #555;
    text-align: center; transform: translateX(-50%);
}

/* Legend and Action Buttons */
#legend-wrapper { text-align: center; margin-top: 20px; cursor: pointer; }
.legend {
    display: flex; justify-content: center; flex-wrap: wrap;
    margin-bottom: 20px; font-size: 14px; gap: 20px;
}
.legend-item { display: flex; align-items: center; }
.legend-color { width: 20px; height: 20px; border-radius: 50%; margin-right: 8px; }

/* Suggested Scales & Slides */
#suggested-scales-container { margin-top: 30px; text-align: center; }
#suggested-scales-container h2 { margin-bottom: 10px; }
#suggested-scales-container ul {
    list-style-type: none; padding: 0; display: flex;
    flex-wrap: wrap; justify-content: center; gap: 10px;
}
#suggested-scales-container li {
    background-color: #fff; padding: 8px 15px; border-radius: 20px;
    border: 1px solid #ddd; font-weight: bold; font-size: 14px;
    cursor: pointer; transition: all 0.2s ease-in-out;
}
#suggested-scales-container li:hover { background-color: #e9e9e9; }
#suggested-scales-container li.active {
    background-color: #3498db; color: white; border-color: #3498db;
}
#slides-container {
    margin-top: 25px; display: flex; flex-direction: column;
    align-items: center; gap: 10px;
}
#slides-container.hidden { display: none; }
#toggle-slides-btn {
    flex-shrink: 0; width: 150px; background-color: #f5f5f5;
    border: 1px solid #ccc; padding: 8px 12px; border-radius: 4px; cursor: pointer;
}
#toggle-slides-btn.underlined { text-decoration: underline; text-decoration-thickness: 2px; }
#slide-controls-container { display: flex; align-items: center; gap: 10px; }
#slide-controls-container.hidden { display: none; }
.slide-control-group {
    display: flex; gap: 5px; border: 1px solid #ddd;
    border-radius: 4px; padding: 2px;
}
.slide-btn, .genre-btn {
    padding: 6px 10px; width: auto; background-color: transparent;
    border: 1px solid transparent; font-size: 12px; cursor: pointer;
}
.slide-btn.active, .genre-btn.active {
    background-color: #fff; border: 1px solid #ccc;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1); color: #333;
}
.note.scale-note { background-color: #ccc !important; color: #555 !important; }
@keyframes pulse-level-1-animation {
    0% { width: 30px; height: 30px; box-shadow: 0 3px 6px rgba(0,0,0,0.3); }
    50% { width: 36px; height: 36px; box-shadow: 0 5px 15px rgba(192, 57, 43, 0.6); }
    100% { width: 30px; height: 30px; box-shadow: 0 3px 6px rgba(0,0,0,0.3); }
}
@keyframes pulse-level-2-animation {
    0% { width: 30px; height: 30px; box-shadow: 0 3px 6px rgba(0,0,0,0.3); }
    50% { width: 34px; height: 34px; box-shadow: 0 4px 10px rgba(192, 57, 43, 0.4); }
    100% { width: 30px; height: 30px; box-shadow: 0 3px 6px rgba(0,0,0,0.3); }
}
.note.flavor-note-level-1 { animation: pulse-level-1-animation 2.5s infinite ease-in-out; }
.note.flavor-note-level-2 { animation: pulse-level-2-animation 3.0s infinite ease-in-out; }
.left-handed-view { padding-left: 20px; padding-right: 55px; }
.left-handed-view #strings-and-frets,
.left-handed-view #fret-number-row,
.left-handed-view #slide-overlay-container,
.left-handed-view #note-overlay-container { transform: scaleX(-1); }
.left-handed-view #slide-overlay-container,
.left-handed-view #note-overlay-container { left: 20px; right: 55px; }
.left-handed-view .note { transform: translate(-50%, -50%) scaleX(-1) translateX(-6px); }
.left-handed-view .fret-number,
.left-handed-view .string-name-label { transform: translate(-50%, -50%) scaleX(-1) !important; }
.greyscale-mode .note { background-color: #a5a5a5 !important; color: white !important; }

/* Overlay Layers */
#slide-overlay-container {
    position: absolute; top: 20px; left: 55px; right: 0; bottom: 0;
    pointer-events: none; z-index: 3;
}
#note-overlay-container {
    position: absolute; top: 20px; left: 55px; right: 0; bottom: 0;
    pointer-events: none; z-index: 4;
}
.slide-arrow {
    position: absolute; height: 8px; transform-origin: left center;
    background-color: var(--target-color, #3498db);
    left: var(--arrow-x-pos); width: var(--arrow-width);
}
.slide-arrow::after {
    content: ''; position: absolute; right: -1px; top: 50%;
    transform: translateY(-50%); width: 0; height: 0; 
    border-top: 11px solid transparent; border-bottom: 11px solid transparent;
    border-left: 13px solid var(--target-color, #3498db);
}
.slide-arrow.down-slide::after { display: none; }
.slide-arrow.down-slide::before {
    content: ''; position: absolute; left: -1px; top: 50%;
    transform: translateY(-50%); width: 0; height: 0; 
    border-top: 11px solid transparent; border-bottom: 11px solid transparent;
    border-right: 13px solid var(--target-color, #3498db);
}