@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&family=Outfit:wght@500;700;800&display=swap');

:root {
    --bg-color: #0f1115;
    --text-main: #f0f3f8;
    --text-muted: #8b949e;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --accent: #10b981;
    
    --fretboard-wood: linear-gradient(90deg, #382414 0%, #462c19 50%, #382414 100%);
    --fret-color: linear-gradient(90deg, #e2e8f0 0%, #cbd5e1 50%, #94a3b8 100%);
    --string-color: #94a3b8;
    
    --glass-bg: rgba(30, 33, 40, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --input-bg: rgba(15, 17, 21, 0.8);
}

:root[data-theme="light"] {
    --bg-color: #f8fafc;
    --text-main: #0f1115;
    --text-muted: #334155;
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(0, 0, 0, 0.12);
    --input-bg: rgba(255, 255, 255, 0.9);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    background-image: radial-gradient(circle at 15% 50%, rgba(99, 102, 241, 0.15), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.15), transparent 25%);
}

.app-container {
    width: 100%;
    max-width: 100%;
    padding: 1rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

header {
    text-align: center;
    margin-bottom: 0.25rem;
    position: relative;
}

.theme-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-main);
    transition: transform 0.3s, filter 0.3s;
    user-select: none;
}

.theme-toggle:hover {
    transform: translateY(-50%) scale(1.1);
    filter: brightness(1.2);
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(to right, #6366f1, #10b981);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.panel {
    padding: 1rem 1.5rem;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

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

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

select {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    min-width: 150px;
}

select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.3);
}

/* Segmented Control */
.segmented-control {
    display: flex;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 4px;
    position: relative;
    overflow: hidden;
    height: 36px; /* Match height of selects roughly */
}

.segmented-control input[type="radio"] {
    display: none;
}

.segmented-control label {
    flex: 1;
    text-align: center;
    padding: 0 1rem;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-muted);
    border-radius: 6px;
    transition: all 0.3s;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.segmented-control input[type="radio"]:checked + label {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--input-bg);
    border: 1px solid var(--glass-border);
    transition: .3s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-muted);
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
    border-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(24px);
    background-color: #fff;
}

/* Fretboard Styles */
.fretboard-container {
    padding: 0.5rem 1rem 1.25rem 1rem;
    overflow-x: auto;
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    align-items: flex-start;
}

.fretboard-container.left-handed-layout {
    flex-direction: row-reverse;
}

.fretboard {
    display: flex;
    flex-direction: column;
    background: var(--fretboard-wood);
    border-radius: 4px;
    position: relative;
    min-width: 900px;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.8), 0 10px 30px rgba(0,0,0,0.5);
    border-top: 2px solid #5a3c26;
    border-bottom: 2px solid #23160e;
    transition: background 0.3s;
    flex: 1;
}

.string-container {
    display: flex;
    flex-direction: column;
}

.string {
    display: flex;
    width: 100%;
    position: relative;
    height: 36px; /* height between strings */
}

/* Base lines for the actual strings physically */
.string::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 3px; /* Default height */
    background: var(--string-color);
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    box-shadow: 0 1px 2px rgba(0,0,0,0.5);
    z-index: 2;
    pointer-events: none;
}

/* Make thicker strings for E A D... */
.string:nth-child(1)::after { height: 1.5px; opacity: 0.9; }
.string:nth-child(2)::after { height: 1.8px; opacity: 0.85; }
.string:nth-child(3)::after { height: 2.2px; opacity: 0.8; }
.string:nth-child(4)::after { height: 2.8px; background: #a19a86; box-shadow: inset 0 0.5px 1px rgba(255,255,255,0.3), 0 2px 3px rgba(0,0,0,0.6); opacity: 0.9;}
.string:nth-child(5)::after { height: 3.5px; background: #a19a86; box-shadow: inset 0 1px 1.5px rgba(255,255,255,0.3), 0 2px 4px rgba(0,0,0,0.6); opacity: 0.95;}
.string:nth-child(6)::after { height: 4.5px; background: #a19a86; box-shadow: inset 0 1px 2px rgba(255,255,255,0.3), 0 2px 4px rgba(0,0,0,0.6); opacity: 1;}
.string:nth-child(7)::after { height: 5.5px; background: #a19a86; box-shadow: inset 0 1px 2.5px rgba(255,255,255,0.3), 0 2px 5px rgba(0,0,0,0.6); opacity: 1;}
.string:nth-child(8)::after { height: 6.5px; background: #a19a86; box-shadow: inset 0 1px 3px rgba(255,255,255,0.3), 0 2px 6px rgba(0,0,0,0.6); opacity: 1;}

.fret {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border-right: 3px solid transparent; /* The physical fret wire layout space */
}

/* Draw the metal fret */
.fret::after {
    content: '';
    position: absolute;
    right: -1.5px; /* center on the border */
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--fret-color);
    box-shadow: -1px 0 2px rgba(0,0,0,0.5), 1px 0 1px rgba(255,255,255,0.2);
    z-index: 1;
}

.fret.open-string {
    flex: 0 0 30px; /* Fixed width for open string section */
    border-right: 6px solid #d4d4d8; /* The nut */
    background: #18181b;
}

.fret.open-string::after {
    display: none; /* No fret wire on the nut for the open string area */
}
.fret.open-string::before {
    content: '';
    position: absolute;
    right: -6px;
    top: 0;
    bottom: 0;
    width: 6px;
    background: linear-gradient(90deg, #e5e5e5, #d4d4d8, #a1a1aa); /* Nut styling */
    z-index: 3;
}

/* Fret markers (inlays) */
.inlay {
    position: absolute;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    z-index: 0; /* behind strings */
    pointer-events: none;
}

.single-inlay {
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.double-inlay-top {
    width: 12px;
    height: 12px;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
}

.double-inlay-bottom {
    width: 12px;
    height: 12px;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
}


/* Notes */
.note-dot {
    position: absolute;
    width: 22px;
    height: 22px;
    background: #475569;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    z-index: 4;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
                opacity 0.2s, background-color 0.3s;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
    user-select: none;
}

.note-dot.visible {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.note-dot.visible.faded {
    opacity: 0.15;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.3);
    box-shadow: none;
}

.note-dot.visible.faded.root {
    border-color: var(--primary);
    color: var(--primary);
    background: transparent;
    box-shadow: none;
}

.note-dot.root {
    background: var(--primary);
    box-shadow: 0 0 12px var(--primary);
}

.fret:hover .note-dot.visible {
    transform: translate(-50%, -50%) scale(1.15);
    filter: brightness(1.2);
}

/* Fret numbers */
.fret-numbers {
    display: flex;
    width: 100%;
    padding-top: 10px;
}

.fret-number {
    flex: 1;
    text-align: center;
    color: #cbd5e1; /* Fixed light color since wood is always dark */
    font-size: 0.8rem;
    font-weight: 500;
}

.fret-number.open-string-num {
    flex: 0 0 30px;
}

/* Base Woods */
.wood-rosewood {
    --fretboard-wood: linear-gradient(90deg, #382414 0%, #462c19 50%, #382414 100%);
}
.wood-maple {
    --fretboard-wood: linear-gradient(90deg, #dfc696 0%, #e8d0a8 50%, #c4aa7c 100%);
    border-top-color: #8c7349;
    border-bottom-color: #5c4722;
}
.wood-maple .note-dot {
    background: #1e293b;
}
.wood-maple .inlay {
    background: rgba(0,0,0,0.4);
}
.wood-ebony {
    --fretboard-wood: linear-gradient(90deg, #18191a 0%, #222325 50%, #151515 100%);
    border-top-color: #333;
    border-bottom-color: #000;
}

/* Left handed flip rules */
.left-handed .string,
.left-handed .fret-numbers {
    flex-direction: row-reverse;
}

.left-handed .fret.open-string {
    border-right: none;
    border-left: 6px solid #d4d4d8;
}

.left-handed .fret.open-string::before {
    right: auto;
    left: -6px;
    background: linear-gradient(-90deg, #e5e5e5, #d4d4d8, #a1a1aa);
}

.left-handed .fret::after {
    right: auto;
    left: -1.5px;
}

/* Tuning UI inside fretboard */
.tuning-cell {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    z-index: 10;
    background: rgba(15, 17, 21, 0.4);
    border-right: 2px solid rgba(0,0,0,0.3);
    flex: 0 0 55px;
}
.left-handed .tuning-cell {
    border-right: none;
    border-left: 2px solid rgba(0,0,0,0.3);
}

.tuning-cell-spacer {
    flex: 0 0 55px;
}

.tuning-select-group {
    display: flex;
    gap: 2px;
    align-items: center;
}
.tuning-select-group select {
    min-width: unset;
    padding: 0.15rem 0.25rem;
    height: 28px;
    font-size: 0.8rem;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    border-radius: 4px;
    cursor: pointer;
}
/* Note dot cursor */
.note-dot {
    cursor: pointer;
}

/* Piano Styles */
.piano-keyboard {
    display: flex;
    justify-content: flex-start;
    height: 250px;
    background: #111;
    border-radius: 4px;
    padding: 4px;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.8), 0 10px 30px rgba(0,0,0,0.5);
    overflow: hidden;
    min-width: 800px;
}

.piano-octave {
    display: flex;
    position: relative;
    flex: 1;
    --bkey-width: 28px;
    --bkey-width-half: 14px;
}

.piano-key {
    position: relative;
    cursor: pointer;
    border-radius: 0 0 4px 4px;
    transition: background 0.2s, box-shadow 0.2s;
    user-select: none;
}

.white-key {
    flex: 1;
    background: #fdfdfd;
    border: 1px solid #ccc;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 10px;
    color: #333;
}

.white-key:hover { background: #eaeaea; }

.black-key {
    position: absolute;
    top: 0;
    width: var(--bkey-width);
    height: 60%;
    background: #222;
    z-index: 2;
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    padding-bottom: 8px;
    color: #eee;
}

.black-key:hover { background: #333; }

.key-label {
    font-size: 0.7rem;
    font-weight: 700;
    opacity: 0.3; /* only show clearly when highlighted */
    transition: opacity 0.2s;
}

/* Highlights */
.piano-key.visible .key-label {
    opacity: 1;
}

.white-key.visible {
    background: #cbd5e1; /* visible scale note */
    border-color: #94a3b8;
}
.black-key.visible {
    background: #475569;
}

.piano-key.root {
    background: var(--primary) !important;
}
.piano-key.root .key-label {
    color: white;
    opacity: 1;
}

/* Piano Synth Theme overrides */
.theme-synth .white-key {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    box-shadow: none;
}
.theme-synth .white-key:hover {
    background: rgba(255, 255, 255, 0.1);
}
.theme-synth .black-key {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: none;
}
.theme-synth .black-key:hover {
    background: rgba(0, 0, 0, 0.6);
}
.theme-synth .white-key.visible, .theme-synth .black-key.visible {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--primary);
    box-shadow: inset 0 0 10px rgba(99, 102, 241, 0.3);
}
.theme-synth .piano-key.root {
    background: rgba(16, 185, 129, 0.2) !important;
    border-color: var(--accent);
    box-shadow: inset 0 0 15px rgba(16, 185, 129, 0.4) !important;
}
.theme-synth .piano-key.root .key-label {
    color: var(--accent);
}

/* Piano Rhodes Theme overrides */
.theme-rhodes .white-key {
    background: #fdf5e6; /* Old Lace / Cream */
    border: 1px solid #dcd0ba;
    color: #4a3b32;
}
.theme-rhodes .white-key:hover {
    background: #faeedb;
}
.theme-rhodes .black-key {
    background: #3b2f2f;
    border: 1px solid #2a2222;
    color: #dcd0ba;
}
.theme-rhodes .black-key:hover {
    background: #4a3b32;
}
.theme-rhodes .white-key.visible, .theme-rhodes .black-key.visible {
    background: #d4a373; /* Warm earthy highlight */
    border-color: #b07d4f;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
    color: #fff;
}
.theme-rhodes .piano-key.root {
    background: #a98467 !important;
    border-color: #7b5b42;
    color: #fff;
}
.theme-rhodes .piano-key.root .key-label {
    color: #fff;
}

/* Piano Matrix Theme overrides */
.theme-matrix {
    background: #000;
    box-shadow: inset 0 0 15px rgba(0, 255, 0, 0.2);
}
.theme-matrix .white-key {
    background: #000;
    border: 1px solid #0f380f;
    color: #0f380f;
}
.theme-matrix .white-key:hover {
    background: #051005;
}
.theme-matrix .black-key {
    background: #000;
    border: 1px solid #0f380f;
    color: #0f380f;
}
.theme-matrix .black-key:hover {
    background: #051005;
}
.theme-matrix .white-key.visible, .theme-matrix .black-key.visible {
    background: #0a2e0a;
    border-color: #33ff33;
    color: #33ff33;
    box-shadow: inset 0 0 8px rgba(51, 255, 51, 0.4);
}
.theme-matrix .piano-key.root {
    background: #1a4d1a !important;
    border-color: #fff;
    color: #fff;
    box-shadow: inset 0 0 15px rgba(255, 255, 255, 0.5) !important;
}
.theme-matrix .piano-key.root .key-label {
    color: #fff;
}

/* Drone Button Styles */
.drone-btn {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    height: 100%;
}

.drone-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.drone-btn.active {
    background: rgba(239, 68, 68, 0.2); /* Red tint for playing */
    border-color: #ef4444;
    color: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.3);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}