:root {
    color-scheme: normal;
    /* Slightly darker light palette */
    --bg: #eef2f9;         /* a touch darker than pure off-white */
    --panel: #f8faff;      /* soft near-white panels */
    --panel2: #eaf0ff;     /* gently tinted secondary surface */
    --text: #0b1330;       /* keep strong contrast for readability */
    --muted: #47557e;      /* a bit deeper muted text */
    --border: rgba(12,20,48,0.18);
    --accent: #295dff;     /* vivid blue accent */
    --danger: #d92b2b;
    --shadow: rgba(12,20,48,0.12);
}

/* Dark mode fallback for users preferring dark */
@media (prefers-color-scheme: light) {
    :root {
        --bg: #0b1020;
        --panel: #121a33;
        --panel2: #0f1730;
        --text: #e7ecff;
        --muted: #a9b3d6;
        --border: rgba(255,255,255,0.12);
        --accent: #7aa2ff;
        --danger: #ff6b6b;
        --shadow: rgba(0,0,0,0.25);
    }
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: radial-gradient(1200px 600px at 20% 0%, rgba(102,142,235,0.18), transparent 60%),
                radial-gradient(900px 500px at 80% 10%, rgba(235,87,87,0.12), transparent 55%),
                var(--bg);
    color: var(--text);
}

header {
    padding: 24px 18px 10px;
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    margin: 0 0 6px 0;
    font-size: 22px;
    letter-spacing: 0.2px;
}

.subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.3;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 18px 28px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 14px;
}

@media (max-width: 900px) {
    main { grid-template-columns: 1fr; }
}

.panel {
    background: linear-gradient(180deg, rgba(12,20,48,0.03), transparent 35%), var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 10px 26px var(--shadow);
    overflow: hidden;
}

/* Available chords panel responsive heights */
.panel-available {
    /* Desktop/base: fill the grid row height */
    height: 100%;
    display: flex;
    flex-direction: column;
}

.panel-available .content {
    /* Inner area scrolls and can shrink inside the flex parent */
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 0;
}

/* Mobile: cap to 30% of viewport height */
@media (max-width: 900px) {
    .panel-available {
        height: 30vh;
        align-self: start; /* avoid grid stretching on small screens */
    }
}

.panel header {
    padding: 12px 12px 8px;
}

.panel h2 {
    margin: 0;
    font-size: 15px;
    font-weight: 650;
}

.panel .content {
    padding: 10px 12px 12px;
}

.row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.hint {
    font-size: 12px;
    color: var(--muted);
    margin: 6px 0 0 0;
    line-height: 1.35;
}

.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(12,20,48,0.05);
    cursor: grab;
    user-select: none;
    font-size: 13px;
    letter-spacing: 0.2px;
    transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.pill:hover {
    border-color: rgba(122,162,255,0.5);
    transform: translateY(-1px);
    background: rgba(122,162,255,0.12);
}

.pill:active { cursor: grabbing; }

.pill[aria-grabbed="true"] {
    opacity: 0.85;
    border-color: rgba(122,162,255,0.75);
    background: rgba(122,162,255,0.18);
}

.pill .x {
    margin-left: 8px;
    font-weight: 700;
    line-height: 1;
    border: 0;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 6px;
}

.pill .x:hover { color: var(--danger); background: rgba(255,107,107,0.10); }

.dropzone {
    padding: 12px;
    border-radius: 12px;
    border: 1px dashed rgba(122,162,255,0.45);
    background: var(--panel2);
}

.dropzone.dragover {
    border-color: rgba(122,162,255,0.95);
    background: rgba(122,162,255,0.10);
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.toolbar-right {
    justify-content: flex-end;
}

.toolbar-results {
    margin-top: 10px;
}

button {
    appearance: none;
    border: 1px solid var(--border);
    background: rgba(12,20,48,0.03);
    color: var(--text);
    padding: 7px 10px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 13px;
}

button:hover {
    border-color: rgba(122,162,255,0.50);
    background: rgba(122,162,255,0.10);
}

button.danger:hover {
    border-color: rgba(255,107,107,0.55);
    background: rgba(255,107,107,0.10);
}

.muted {
    color: var(--muted);
    font-size: 12px;
}

.results {
    margin-top: 8px;
    display: grid;
    gap: 8px;
}

.result-item {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.result-item code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 12px;
    color: var(--text);
    word-break: break-all;
}

.status {
    font-size: 12px;
    color: var(--muted);
    min-height: 18px;
}

.kpi {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
}

.kpi strong { font-size: 14px; }

/* Compact select for Max results — styled to match buttons/pills */
#resultsLimit {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    border: 1px solid var(--border);
    background: rgba(12,20,48,0.03);
    color: var(--text);
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
}

#resultsLimit:hover {
    border-color: rgba(122,162,255,0.50);
    background: rgba(122,162,255,0.10);
}

#resultsLimit:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}