/* Fretboard Sensei — its own dark, landscape-first theme. */

:root {
    --fs-bg: #16181d;
    --fs-bg-2: #1e2128;
    --fs-bg-3: #262a33;
    --fs-text: #e7e9ee;
    --fs-muted: #9aa0ad;
    --fs-accent: #f0a868;       /* amber */
    --fs-accent-2: #6ec1c4;     /* teal  */

    /* Tokens the SVG components read: */
    --fs-line: #8a8f9a;         /* fret wires */
    --fs-string: #cfd3da;       /* strings */
    --fs-neck-wood: #2e2823;    /* fretboard */
    --fs-inlay: #574d41;        /* position inlays */
    --fs-dot: var(--fs-accent); /* chord-tone dots */
    --fs-root: var(--fs-accent-2); /* root highlight */
}

* { box-sizing: border-box; }
html { color-scheme: dark; }

body {
    margin: 0;
    background: radial-gradient(1200px 600px at 50% -10%, #20242d 0%, var(--fs-bg) 60%);
    color: var(--fs-text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ─────────────────────────────────────────────── */
.fs-header { padding: 1.1rem clamp(0.75rem, 3vw, 2rem) 0.5rem; }
.fs-titlebar {
    width: min(1200px, 100%);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.fs-logo {
    margin: 0;
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}
.fs-logo span { color: var(--fs-accent); }

.fs-modes {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 100%;
    gap: 0.35rem;
    background: var(--fs-bg-2);
    padding: 0.3rem;
    border-radius: 1.2rem;
    border: 1px solid #2c3038;
}
.fs-mode {
    border: 0; background: transparent; color: var(--fs-muted);
    padding: 0.45rem 0.9rem; border-radius: 999px;
    font: inherit; font-weight: 600; cursor: pointer;
}
.fs-mode.is-active { background: var(--fs-accent); color: #1a1206; }
.fs-mode:disabled { cursor: default; opacity: 0.55; }
.fs-mode em { font-style: normal; font-size: 0.65em; text-transform: uppercase; opacity: 0.7; margin-left: 0.25rem; }

/* ── Toolbar (tuning) ───────────────────────────────────── */
.fs-toolbar {
    width: min(1200px, 100%);
    margin: 0.4rem auto 0;
    padding: 0 clamp(0.75rem, 3vw, 2rem);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}
.fs-tuning-label {
    display: inline-flex; align-items: center; gap: 0.4rem;
    color: var(--fs-muted); font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.fs-tuning {
    background: var(--fs-bg-2); color: var(--fs-text);
    border: 1px solid #353a44; border-radius: 0.5rem;
    padding: 0.4rem 0.55rem; font: inherit; font-weight: 600; cursor: pointer;
}
.fs-tb-prog-wrap { margin-right: auto; }          /* push the picker to the left */
.fs-tb-prog-wrap[hidden] { display: none; }
.fs-tb-prog {
    display: inline-flex; align-items: center; justify-content: space-between;
    gap: 0.6rem; min-width: 13rem; text-align: left;
}
.fs-tb-prog:hover { border-color: var(--fs-accent); }

/* ── Layout ─────────────────────────────────────────────── */
.fs-main {
    flex: 1;
    width: min(1200px, 100%);
    margin: 0 auto;
    padding: 1rem clamp(0.75rem, 3vw, 2rem) 3rem;
}
.fs-stage[hidden] { display: none; }
.fs-scale-notes { color: var(--fs-accent-2); font-weight: 600; letter-spacing: 0.04em; }

/* ── Picker ─────────────────────────────────────────────── */
fs-chord-picker { display: block; }
.fs-picker-row { display: flex; align-items: flex-start; gap: 0.75rem; padding: 0.45rem 0; }
.fs-picker-label {
    flex: 0 0 4.5rem; color: var(--fs-muted); font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.08em; padding-top: 0.5rem;
}
.fs-roots, .fs-quals { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.fs-quals { gap: 0.5rem 1.2rem; }
.fs-group { display: flex; flex-direction: column; gap: 0.3rem; }
.fs-group-label { font-size: 0.68rem; color: var(--fs-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.fs-group-chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.fs-chip {
    border: 1px solid #353a44; background: var(--fs-bg-2); color: var(--fs-text);
    padding: 0.4rem 0.65rem; border-radius: 0.5rem;
    font: inherit; font-weight: 600; cursor: pointer;
    transition: background 0.12s, border-color 0.12s, transform 0.05s;
}
.fs-chip:hover { border-color: var(--fs-accent); }
.fs-chip:active { transform: translateY(1px); }
.fs-root { min-width: 2.5rem; text-align: center; }
.fs-chip.is-active { background: var(--fs-accent); border-color: var(--fs-accent); color: #1a1206; }

/* ── Stage (single chord) ───────────────────────────────── */
.fs-stage {
    margin-top: 1.25rem;
    background: var(--fs-bg-2);
    border: 1px solid #2c3038;
    border-radius: 1rem;
    padding: 1.1rem clamp(0.8rem, 2vw, 1.4rem) 1.3rem;
}
.fs-stage-head { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; }
.fs-chord-title { margin: 0; font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; }
.fs-chord-tones { color: var(--fs-accent-2); font-weight: 600; letter-spacing: 0.04em; }

/* Strum / play button */
.fs-play {
    margin-left: auto;
    display: inline-flex; align-items: center; gap: 0.4rem;
    border: 0; border-radius: 999px; cursor: pointer;
    background: var(--fs-accent); color: #1a1206;
    font: inherit; font-weight: 700; padding: 0.5rem 1rem;
}
.fs-play:hover { filter: brightness(1.08); }
.fs-play:active { transform: translateY(1px); }
.fs-play:disabled { opacity: 0.4; cursor: default; }
.fs-play svg { display: block; }

/* ── Mode inputs share the panel; only the active one shows ─────────────── */
fs-nashville { display: block; }
fs-chord-picker[hidden], fs-nashville[hidden] { display: none; }

/* Nashville pad */
.fs-modes-seg { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.fs-nash-nums { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.fs-nash-num {
    display: flex; flex-direction: column; align-items: center; gap: 0.15rem;
    min-width: 3.6rem; padding: 0.45rem 0.6rem;
    border: 1px solid #353a44; background: var(--fs-bg-2); color: var(--fs-text);
    border-radius: 0.55rem; font: inherit; cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
}
.fs-nash-num:hover { border-color: var(--fs-accent); }
.fs-nash-num.is-active { background: var(--fs-accent); border-color: var(--fs-accent); color: #1a1206; }
.fs-nash-numeral { font-weight: 800; font-size: 0.95rem; }
.fs-nash-cname { font-size: 0.78rem; opacity: 0.8; }
.fs-nash-num.is-active .fs-nash-cname { opacity: 0.85; }
.fs-nash-ovs { display: flex; flex-wrap: wrap; gap: 0.35rem; }

/* Position selector */
fs-positions { display: flex; align-items: center; gap: 0.5rem; margin: 0.9rem 0; }
.fs-pos-nav {
    flex: 0 0 auto; width: 2rem; height: 2rem; border-radius: 50%;
    border: 1px solid #353a44; background: var(--fs-bg-3); color: var(--fs-text);
    font-size: 1.2rem; line-height: 1; cursor: pointer;
}
.fs-pos-nav:hover { border-color: var(--fs-accent); }
.fs-pos-pills { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.fs-pos-pill {
    border: 1px solid #353a44; background: var(--fs-bg-3); color: var(--fs-text);
    padding: 0.4rem 0.7rem; border-radius: 0.5rem; font: inherit; font-weight: 600; cursor: pointer;
    display: inline-flex; align-items: baseline; gap: 0.35rem;
}
.fs-pos-pill:hover { border-color: var(--fs-accent); }
.fs-pos-pill.is-active { background: var(--fs-accent); border-color: var(--fs-accent); color: #1a1206; }
.fs-pos-fret { font-size: 0.72em; opacity: 0.75; }

/* The neck */
fs-neck { display: block; overflow-x: auto; }
.fs-neck-svg { width: 100%; min-width: 720px; height: auto; display: block; }
.fs-neck-open-lbl { fill: var(--fs-muted); font-size: 12px; font-weight: 700; font-family: system-ui, sans-serif; }
.fs-neck-x { fill: var(--fs-muted); font-size: 13px; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-neck-finger { fill: #14110b; font-size: 11px; font-weight: 800; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-neck-fretnum { fill: var(--fs-muted); font-size: 11px; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-neck-note-dot { fill: #14110b; font-size: 8.5px; font-weight: 700; text-anchor: middle; font-family: system-ui, sans-serif; }

/* Detail row: tab + piano side by side on desktop */
.fs-detail { display: flex; gap: 1.2rem; margin-top: 1rem; flex-wrap: wrap; }
.fs-detail-block { flex: 1 1 280px; min-width: 0; }
.fs-detail-label { display: block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--fs-muted); margin-bottom: 0.35rem; }

fs-tab { display: block; }
.fs-tab-svg { width: 100%; height: auto; max-width: 300px; display: block; }
.fs-tab-lbl { fill: var(--fs-muted); font-size: 11px; font-weight: 700; font-family: system-ui, sans-serif; }
.fs-tab-num { fill: #14110b; font-size: 11px; font-weight: 800; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-tab-open { fill: var(--fs-muted); font-size: 10px; font-weight: 700; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-tab-x { fill: var(--fs-muted); font-size: 12px; text-anchor: middle; font-family: system-ui, sans-serif; }
.fs-piano-svg { width: 100%; height: auto; display: block; max-width: 520px; }
.fs-piano-label { fill: var(--fs-muted); font-size: 7px; font-family: system-ui, sans-serif; }

/* ── Progressions ───────────────────────────────────────── */
fs-progression { display: block; }
fs-progression[hidden] { display: none; }

.fs-prog-controls {
    display: flex; flex-wrap: wrap; align-items: end; gap: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}
.fs-prog-ctl {
    display: flex; flex-direction: column; gap: 0.3rem;
    color: var(--fs-muted); font-size: 0.72rem;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.fs-prog-select {
    background: var(--fs-bg-2); color: var(--fs-text);
    border: 1px solid #353a44; border-radius: 0.5rem;
    padding: 0.45rem 0.55rem; font: inherit; font-weight: 600; cursor: pointer;
}
.fs-prog-play, .fs-prog-loop, .fs-prog-toggle { align-self: end; }
.fs-prog-loop, .fs-prog-toggle { padding: 0.5rem 0.9rem; }

.fs-prog-slots { display: flex; flex-wrap: wrap; gap: 0.7rem; align-items: stretch; }
.fs-prog-slot {
    position: relative;
    display: flex; flex-direction: column; gap: 0.5rem;
    background: var(--fs-bg-2); border: 1px solid #2c3038;
    border-radius: 0.8rem; padding: 0.7rem; min-width: 6.5rem;
    transition: border-color 0.1s, box-shadow 0.1s, transform 0.1s;
}
.fs-prog-slot.is-playing {
    border-color: var(--fs-accent);
    box-shadow: 0 0 0 2px var(--fs-accent), 0 6px 20px -6px var(--fs-accent);
    transform: translateY(-2px);
}
.fs-prog-head { display: flex; align-items: baseline; justify-content: center; gap: 0.4rem; }
.fs-prog-numeral { color: var(--fs-accent-2); font-weight: 700; font-size: 0.8rem; }
.fs-prog-name { font-size: 1.25rem; font-weight: 800; }
.fs-prog-face {
    display: block; width: 100%; border: 0; background: transparent;
    cursor: pointer; padding: 0.25rem; border-radius: 0.5rem;
}
.fs-prog-face:hover { background: var(--fs-bg-3); }
.fs-prog-dia { width: 100%; height: auto; max-width: 92px; display: block; margin: 0 auto; }
.fs-prog-dia-fr { fill: var(--fs-muted); font-size: 9.5px; font-weight: 600; font-family: system-ui, sans-serif; }
.fs-prog-dia-x { fill: var(--fs-muted); font-size: 8px; font-family: system-ui, sans-serif; }
.fs-prog-slot-controls { display: flex; flex-direction: column; gap: 0.35rem; }
.fs-prog-deg, .fs-prog-var, .fs-prog-dur {
    width: 100%;
    background: var(--fs-bg-3); color: var(--fs-text);
    border: 1px solid #353a44; border-radius: 0.4rem;
    padding: 0.3rem 0.35rem; font: inherit; font-size: 0.8rem; cursor: pointer;
}
.fs-prog-open {
    border: 0; background: transparent; cursor: pointer;
    color: var(--fs-accent-2); font: inherit; font-size: 0.72rem; font-weight: 600;
    padding: 0.15rem 0; border-radius: 0.3rem;
}
.fs-prog-open:hover { text-decoration: underline; }
.fs-prog-remove {
    position: absolute; top: -0.5rem; right: -0.5rem;
    width: 1.4rem; height: 1.4rem; border-radius: 50%;
    border: 1px solid #353a44; background: var(--fs-bg-3); color: var(--fs-muted);
    font-size: 0.7rem; line-height: 1; cursor: pointer; opacity: 0; transition: opacity 0.1s;
}
.fs-prog-slot:hover .fs-prog-remove { opacity: 1; }
.fs-prog-remove:hover { color: var(--fs-text); border-color: var(--fs-accent); }
.fs-prog-add {
    align-self: center;
    min-width: 3rem; border: 1px dashed #454b57; background: transparent;
    color: var(--fs-muted); border-radius: 0.8rem; font-size: 1.3rem; cursor: pointer;
}
.fs-prog-add:hover { border-color: var(--fs-accent); color: var(--fs-text); }

/* Progression-picker button + pane */
.fs-prog-preset-btn {
    display: inline-flex; align-items: center; justify-content: space-between;
    gap: 0.6rem; min-width: 12rem; text-align: left;
}
.fs-prog-pane {
    position: fixed; inset: 0; z-index: 50;
    background: rgba(0, 0, 0, 0.55);
    display: flex; align-items: center; justify-content: center; padding: 1rem;
}
.fs-prog-pane[hidden] { display: none; }
.fs-prog-pane-box {
    background: var(--fs-bg-2); border: 1px solid #2c3038; border-radius: 1rem;
    width: min(920px, 100%); max-height: 82vh; overflow: auto; padding: 1.2rem 1.4rem 1.4rem;
}
.fs-prog-pane-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.fs-prog-pane-head h3 { margin: 0; font-size: 1.3rem; }
.fs-prog-pane-head p { margin: 0.25rem 0 0; color: var(--fs-muted); font-size: 0.8rem; }
.fs-prog-pane-close {
    flex: 0 0 auto; width: 2rem; height: 2rem; border-radius: 50%;
    border: 1px solid #353a44; background: var(--fs-bg-3); color: var(--fs-text);
    cursor: pointer; font-size: 0.9rem;
}
.fs-prog-pane-close:hover { border-color: var(--fs-accent); }
.fs-prog-pane-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1.1rem; }
.fs-prog-pane-genre h4 {
    margin: 0 0 0.5rem; color: var(--fs-accent); font-size: 0.78rem;
    text-transform: uppercase; letter-spacing: 0.08em;
}
.fs-prog-pane-item {
    display: flex; flex-direction: column; gap: 0.3rem;
    background: var(--fs-bg-3); border-radius: 0.55rem;
    padding: 0.5rem 0.6rem; margin-bottom: 0.45rem;
}
.fs-prog-pane-name {
    width: 100%; text-align: left; border: 0; background: transparent;
    color: var(--fs-text); font: inherit; font-weight: 700; font-size: 0.9rem; cursor: pointer; padding: 0;
}
.fs-prog-pane-name:hover { color: var(--fs-accent); }
.fs-prog-pane-egs { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; }
.fs-prog-pane-song {
    border: 1px solid #353a44; background: var(--fs-bg-2); color: var(--fs-accent-2);
    border-radius: 0.4rem; padding: 0.12rem 0.42rem; font: inherit; font-size: 0.72rem; cursor: pointer;
}
.fs-prog-pane-song:hover { border-color: var(--fs-accent-2); }
.fs-prog-pane-note { color: var(--fs-muted); font-size: 0.72rem; }

/* ── Footer ─────────────────────────────────────────────── */
.fs-footer {
    display: flex; justify-content: space-between;
    padding: 1rem clamp(0.75rem, 3vw, 2rem);
    color: var(--fs-muted); font-size: 0.85rem; border-top: 1px solid #2c3038;
}
.fs-footer a { color: var(--fs-accent-2); text-decoration: none; }
.fs-footer a:hover { text-decoration: underline; }

/* ── Narrow screens ─────────────────────────────────────── */
@media (max-width: 640px) {
    .fs-picker-row { flex-direction: column; gap: 0.4rem; }
    .fs-picker-label { padding-top: 0; }
    .fs-titlebar { justify-content: center; }

    /* Toolbar: stack the Progression picker + Tuning so neither overflows. */
    .fs-toolbar { flex-direction: column; align-items: stretch; gap: 0.5rem; }
    .fs-tuning-label { justify-content: space-between; }
    .fs-tb-prog-wrap { margin-right: 0; }
    .fs-tb-prog { min-width: 0; flex: 1; }
    .fs-tuning { flex: 1; }
}