/* FRETFLOW — amp-panel rock'n'roll styling */
:root {
  --bg: #0d0c0b;
  --bg2: #161412;
  --panel: #1d1a17;
  --panel2: #26221e;
  --line: #3a342d;
  --cream: #f3ead7;
  --text: #e9e1d0;
  --muted: #a89f8e;
  --red: #e0312a;
  --red-dk: #a41f1a;
  --amber: #f5a623;
  --gold: #d9b45a;
  --blue: #3fa9f5;
  --purple: #b57edc;
  --teal: #3ec9b0;
  --chrome: linear-gradient(180deg, #f4f4f4 0%, #bfbfbf 45%, #8d8d8d 55%, #d9d9d9 100%);
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .45);
  --font-display: 'Bebas Neue', 'Oswald', Impact, sans-serif;
  --font-hand: 'Permanent Marker', 'Comic Sans MS', cursive;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

body {
  margin: 0;
  background-color: var(--bg);
  /* Tolex-style texture */
  background-image:
    radial-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    radial-gradient(rgba(0,0,0,.35) 1px, transparent 1px);
  background-size: 4px 4px, 7px 7px;
  background-position: 0 0, 2px 3px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--amber); }
a:hover { color: var(--cream); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--amber); color: #000; padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: .04em; font-weight: 400; line-height: 1.05; color: var(--cream); }
h2 { font-size: 2.1rem; margin: 2.4rem 0 .8rem; }
h3 { font-size: 1.5rem; margin: 2rem 0 .6rem; color: var(--amber); }
h4 { margin: 0 0 .4rem; font-size: 1.02rem; color: var(--cream); }
.muted { color: var(--muted); }
.small { font-size: .88rem; }
code, kbd { font-family: var(--font-mono); background: #000; border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; font-size: .88em; color: var(--cream); }
b, strong { color: var(--cream); }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 10px 22px;
  background: linear-gradient(180deg, #23201c, #141210);
  border-bottom: 2px solid #000;
  box-shadow: 0 2px 0 #3a332b inset, 0 6px 18px rgba(0,0,0,.5);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--cream); }
.brand-logo {
  font-family: var(--font-hand); font-size: 1.7rem; color: var(--cream);
  text-shadow: 0 0 1px #000, 2px 2px 0 var(--red-dk);
  transform: rotate(-3deg); display: inline-block;
}
.brand small { font-family: var(--font-display); letter-spacing: .25em; color: var(--muted); font-size: .8rem; }
.jewel { width: 14px; height: 14px; border-radius: 50%; background: radial-gradient(circle at 35% 35%, #ff8a7a, var(--red) 45%, #5a0b08); box-shadow: 0 0 10px var(--red), 0 0 0 2px #000, 0 0 0 3px #777; animation: glow 2.6s ease-in-out infinite; }
@keyframes glow { 50% { box-shadow: 0 0 18px var(--red), 0 0 0 2px #000, 0 0 0 3px #777; } }
.nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  font-family: var(--font-display); letter-spacing: .12em; font-size: 1.05rem;
  color: var(--muted); text-decoration: none; padding: 6px 12px; border-radius: 8px;
}
.nav a:hover { color: var(--cream); background: rgba(255,255,255,.05); }
.nav a.active { color: #000; background: var(--amber); }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--cream); border-radius: 8px; padding: 6px 10px; font-size: 1.1rem; }
@media (max-width: 900px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #141210; flex-direction: column; padding: 10px; border-bottom: 2px solid #000; }
  .nav.open { display: flex; }
}

main { min-height: 70vh; }
.page { max-width: 1180px; margin: 0 auto; padding: 28px 22px 80px; }
.narrow { max-width: 860px; }
footer.site { text-align: center; color: var(--muted); font-size: .85rem; padding: 30px 16px 50px; border-top: 1px solid var(--line); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display); letter-spacing: .1em; font-size: 1.05rem;
  color: #fff; background: linear-gradient(180deg, #ef4a40, var(--red) 50%, var(--red-dk));
  border: 1px solid #000; border-radius: 9px; padding: 8px 16px; cursor: pointer;
  box-shadow: 0 1px 0 rgba(255,255,255,.35) inset, 0 3px 0 #000;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.1); color: #fff; }
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 #000; }
.btn.ghost { background: linear-gradient(180deg, #34302b, #221f1b); color: var(--cream); }
.btn.amber { background: linear-gradient(180deg, #ffc35a, var(--amber) 55%, #b97710); color: #1a1000; }
.btn-sm { font-size: .9rem; padding: 4px 11px; border-radius: 7px; }
.btn[aria-pressed="true"] { background: var(--amber); color: #000; }

.seg { display: inline-flex; border: 1px solid #000; border-radius: 8px; overflow: hidden; }
.seg button { background: #26221e; color: var(--muted); border: 0; padding: 4px 10px; font-size: .82rem; cursor: pointer; font-family: var(--font-body); }
.seg button + button { border-left: 1px solid #000; }
.seg button[aria-pressed="true"] { background: var(--cream); color: #000; font-weight: 600; }

select, input[type=text], input[type=number] {
  background: #0b0a09; color: var(--cream); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; font: inherit; font-size: .95rem;
}
label.chk { display: inline-flex; gap: 6px; align-items: center; font-size: .88rem; color: var(--muted); }
label.bpm { display: inline-flex; gap: 8px; align-items: center; font-size: .85rem; color: var(--muted); }
label.bpm output { min-width: 2.2em; color: var(--cream); font-family: var(--font-mono); }
input[type=range] { accent-color: var(--amber); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  border-radius: 20px; padding: 56px 44px;
  background:
    linear-gradient(115deg, rgba(13,12,11,.95) 35%, rgba(13,12,11,.4)),
    repeating-linear-gradient(45deg, #c9a86a 0 3px, #9c7b43 3px 6px, #b8955a 6px 9px, #7e5f2f 9px 12px);
  border: 3px solid #000;
  box-shadow: var(--shadow), 0 0 0 1px #4a3f30 inset;
}
.hero h1 { font-size: clamp(3rem, 8vw, 6.4rem); margin: 0; text-shadow: 3px 3px 0 var(--red-dk), 6px 6px 0 #000; }
.hero h1 span { color: var(--amber); }
.hero p.lead { font-size: 1.2rem; max-width: 620px; color: var(--cream); }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.hero-neck { position: absolute; right: -40px; bottom: -10px; width: 520px; opacity: .9; pointer-events: none; transform: rotate(-12deg); }
@media (max-width: 900px) { .hero-neck { display: none; } .hero { padding: 36px 22px; } }
.tag { display: inline-block; font-family: var(--font-display); letter-spacing: .2em; font-size: .85rem; color: #000; background: var(--amber); padding: 2px 10px; border-radius: 4px; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  position: relative; display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--panel2), var(--panel));
  border: 1px solid #000; border-radius: var(--radius); padding: 20px;
  box-shadow: 0 1px 0 rgba(255,255,255,.06) inset, var(--shadow);
  text-decoration: none; color: var(--text);
  transition: transform .15s ease, box-shadow .15s ease;
}
a.card:hover { transform: translateY(-3px); box-shadow: 0 1px 0 rgba(255,255,255,.08) inset, 0 16px 34px rgba(0,0,0,.6), 0 0 0 1px var(--amber); color: var(--text); }
.card h3 { margin: 6px 0 6px; font-size: 1.7rem; color: var(--cream); }
.card p { margin: 0 0 12px; color: var(--muted); font-size: .95rem; }
.card .badge { font-family: var(--font-display); letter-spacing: .18em; font-size: .8rem; color: var(--amber); }
.card .icon { font-size: 2rem; }
.progress { height: 7px; background: #000; border-radius: 99px; overflow: hidden; margin-top: auto; border: 1px solid #2e2924; }
.progress > i { display: block; height: 100%; background: linear-gradient(90deg, var(--red), var(--amber)); }
.card .meta { display: flex; justify-content: space-between; font-size: .8rem; color: var(--muted); margin-top: 8px; }
.course-strip { height: 6px; border-radius: 6px; margin: -20px -20px 14px; border-radius: 12px 12px 0 0; }

.section-head { display: flex; align-items: end; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin: 38px 0 14px; }
.section-head h2 { margin: 0; }

/* ---------- Course & lesson ---------- */
.course-hero { border-radius: 16px; padding: 30px; border: 2px solid #000; margin-bottom: 22px; background: linear-gradient(135deg, var(--panel2), #0f0e0d); position: relative; overflow: hidden; }
.course-hero::after { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 90% 10%, var(--accent, var(--red)) 0, transparent 45%); opacity: .25; pointer-events: none; }
.course-hero h1 { font-size: clamp(2.4rem, 6vw, 4rem); margin: 4px 0; }
.lesson-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.lesson-list a {
  display: grid; grid-template-columns: 54px 1fr auto; gap: 14px; align-items: center;
  padding: 14px 16px; border-radius: 12px; text-decoration: none; color: var(--text);
  background: var(--panel); border: 1px solid #000;
}
.lesson-list a:hover { background: var(--panel2); box-shadow: 0 0 0 1px var(--amber); color: var(--text); }
.lesson-list .num { font-family: var(--font-display); font-size: 1.9rem; color: var(--amber); text-align: center; }
.lesson-list .t { font-weight: 600; color: var(--cream); }
.lesson-list .lock-tag { font-size: .85em; opacity: .8; }
.locked-panel { margin: 28px 0; padding: 36px 24px; text-align: center; border-radius: 14px; background: var(--panel2); box-shadow: 0 0 0 1px var(--amber); }
.locked-panel .lock { font-size: 2.6rem; }
.locked-panel h2 { margin: 8px 0; }
.locked-panel p { max-width: 46ch; margin: 0 auto 18px; }
.lesson-list .s { font-size: .88rem; color: var(--muted); }
.lesson-list .done-mark { font-size: 1.3rem; color: var(--teal); }

.lesson-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 36px; align-items: start; }
@media (max-width: 1000px) { .lesson-layout { grid-template-columns: 1fr; } .lesson-side { display: none; } }
.lesson-side { position: sticky; top: 78px; max-height: calc(100vh - 100px); overflow: auto; font-size: .88rem; padding-right: 6px; }
.lesson-side h4 { font-family: var(--font-display); letter-spacing: .12em; color: var(--muted); font-weight: 400; font-size: 1rem; }
.lesson-side ol { list-style: none; padding: 0; margin: 0; }
.lesson-side li a { display: block; padding: 6px 10px; border-radius: 7px; color: var(--muted); text-decoration: none; border-left: 3px solid transparent; }
.lesson-side li a:hover { color: var(--cream); background: rgba(255,255,255,.04); }
.lesson-side li a.current { color: var(--cream); border-left-color: var(--amber); background: rgba(245,166,35,.08); }
.lesson-side li a.done::after { content: ' ✓'; color: var(--teal); }

.lesson { max-width: 860px; }
.lesson .kicker { font-family: var(--font-display); letter-spacing: .22em; color: var(--amber); }
.lesson h1 { font-size: clamp(2.4rem, 5.5vw, 3.8rem); margin: 4px 0 10px; }
.lesson .summary { font-size: 1.18rem; color: var(--cream); border-left: 4px solid var(--red); padding-left: 16px; margin: 0 0 22px; }
.lesson p, .lesson li { max-width: 72ch; }
.lesson-foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--line); }
.complete-btn[aria-pressed="true"] { background: linear-gradient(180deg, #5ae0c6, var(--teal) 55%, #1d8a76); color: #002018; }

.quote { font-family: var(--font-hand); font-size: 1.25rem; color: var(--amber); transform: rotate(-1deg); margin: 18px 0; }

/* ---------- Callouts ---------- */
.callout { border-radius: 12px; padding: 14px 18px; margin: 18px 0; background: var(--panel); border: 1px solid #000; border-left: 5px solid var(--amber); }
.callout-title { font-family: var(--font-display); letter-spacing: .12em; font-size: 1.1rem; color: var(--amber); margin-bottom: 2px; }
.callout.tip { border-left-color: var(--teal); } .callout.tip .callout-title { color: var(--teal); }
.callout.warn { border-left-color: var(--red); } .callout.warn .callout-title { color: #ff6b5e; }
.callout.rule { border-left-color: var(--blue); background: linear-gradient(90deg, rgba(63,169,245,.08), var(--panel) 40%); } .callout.rule .callout-title { color: var(--blue); }
.callout.fix { border-left-color: var(--purple); } .callout.fix .callout-title { color: var(--purple); }
.callout p:last-child { margin-bottom: 0; }

.mini-cards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); margin: 16px 0; }
.mini-card { background: var(--panel); border: 1px solid #000; border-radius: 12px; padding: 14px 16px; border-top: 3px solid var(--red); }
.mini-card p { margin: 0; font-size: .93rem; color: var(--muted); }
.w-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; margin: 16px 0; border-radius: 12px; border: 1px solid #000; }
table { border-collapse: collapse; width: 100%; font-size: .94rem; background: var(--panel); }
th { font-family: var(--font-display); letter-spacing: .1em; font-weight: 400; text-align: left; background: #0b0a09; color: var(--amber); padding: 9px 12px; font-size: 1rem; }
td { padding: 8px 12px; border-top: 1px solid #2b2621; vertical-align: top; }
tr:hover td { background: rgba(255,255,255,.02); }

/* ---------- Exercises ---------- */
.exercise { margin: 26px 0; background: repeating-linear-gradient(0deg, #1d1a17 0 31px, #24201c 31px 32px); border: 1px solid #000; border-radius: 12px; padding: 16px 20px 8px; position: relative; }
.exercise::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--red); border-radius: 12px 0 0 12px; }
.ex-head { font-weight: 600; color: var(--cream); }
.ex-tag { font-family: var(--font-hand); color: var(--red); font-size: 1.1rem; margin-right: 6px; }
.exercise ol { padding-left: 22px; }
.exercise li { margin: 6px 0; }
.exercise li label { cursor: pointer; display: inline-flex; gap: 8px; align-items: baseline; }
.exercise li input { accent-color: var(--teal); transform: scale(1.15); }
.exercise li.done span { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--teal); }

/* ---------- Fretboard ---------- */
.widget { margin: 18px 0; }
.fb-wrap { margin: 0; background: #0a0908; border: 1px solid #000; border-radius: 14px; padding: 12px 12px 10px; box-shadow: 0 0 0 1px #2b2621 inset; }
.fb-title { font-family: var(--font-display); letter-spacing: .12em; color: var(--cream); font-size: 1.1rem; margin: 0 4px 4px; }
.fb-scroll { overflow-x: auto; }
svg.fretboard { display: block; min-width: 100%; height: auto; max-height: 260px; }
.fb-wood { fill: url(#none); fill: #3b2417; stroke: #000; stroke-width: 2; }
.fb-inlay { fill: #e8dcc0; opacity: .55; }
.fb-fret { stroke: #b9b9b9; stroke-width: 3; }
.fb-nut { stroke: #f2ead6; stroke-width: 8; }
.fb-string { stroke: #d8c79a; opacity: .9; }
.fb-strname { fill: var(--muted); font: 600 12px var(--font-body); text-anchor: middle; }
.fb-fretnum { fill: #6f675b; font: 11px var(--font-body); text-anchor: middle; }
.fb-fretnum.strong { fill: var(--muted); font-weight: 700; }
.fb-arrow { stroke: var(--teal); stroke-width: 2.5; stroke-dasharray: 5 4; }
.fb-arrowhead { fill: var(--teal); }
.fb-arrowtext { fill: var(--teal); font: 700 12px var(--font-body); text-anchor: middle; paint-order: stroke; stroke: #0a0908; stroke-width: 4px; }
.fb-dot { cursor: pointer; }
.fb-dot circle, .fb-dot rect { stroke: #000; stroke-width: 2; transition: transform .12s; transform-box: fill-box; transform-origin: center; }
.fb-dot text { font: 700 11px var(--font-body); text-anchor: middle; pointer-events: none; }
.fb-dot text.small { font-size: 9px; }
.fb-dot:hover circle, .fb-dot:hover rect, .fb-dot:focus circle, .fb-dot:focus rect { stroke: #fff; }
.fb-dot.hit circle, .fb-dot.hit rect { transform: scale(1.35); stroke: #fff; }
.role-root circle, .role-root rect, .lg.role-root i { fill: var(--red); background: var(--red); }
.role-root text { fill: #fff; }
.role-scale circle, .lg.role-scale i { fill: var(--cream); background: var(--cream); }
.role-scale text { fill: #1b1206; }
.role-chord circle, .lg.role-chord i { fill: var(--amber); background: var(--amber); }
.role-chord text { fill: #1b1206; }
.role-blue circle, .lg.role-blue i { fill: var(--blue); background: var(--blue); }
.role-blue text { fill: #001427; }
.role-extra circle, .lg.role-extra i { fill: var(--purple); background: var(--purple); }
.role-extra text { fill: #1a0726; }
.role-ghost circle, .lg.role-ghost i { fill: #4a443c; background: #4a443c; }
.role-ghost text { fill: #cfc6b4; }
.role-mark circle, .lg.role-mark i { fill: var(--teal); background: var(--teal); }
.role-mark text { fill: #002018; }
.fb-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 8px; }
.fb-legend { display: flex; gap: 12px; flex-wrap: wrap; margin-left: auto; font-size: .78rem; color: var(--muted); }
.lg { display: inline-flex; align-items: center; gap: 5px; }
.lg i { width: 11px; height: 11px; border-radius: 50%; border: 1px solid #000; display: inline-block; }
.lg.role-root i { border-radius: 3px; }
figcaption { font-size: .86rem; color: var(--muted); margin-top: 8px; padding: 0 4px; }

/* ---------- Chord diagrams ---------- */
.chord-row { display: flex; flex-wrap: wrap; gap: 14px; }
.chord-fig { margin: 0; background: #f1e8d4; color: #1b1206; border-radius: 12px; padding: 8px 8px 6px; width: 150px; cursor: pointer; border: 2px solid #000; box-shadow: 0 4px 0 #000; transition: transform .1s; text-align: center; }
.chord-fig:hover { transform: translateY(-2px); }
.chord-fig.hit, .chord-fig.playing { transform: translateY(-2px); box-shadow: 0 4px 0 #000, 0 0 0 4px var(--amber); }
.chord-name { font-family: var(--font-display); font-size: 1.6rem; letter-spacing: .04em; line-height: 1; }
.chord-fig figcaption { color: #5b4f3e; font-size: .74rem; margin-top: 0; }
svg.chordbox { width: 100%; height: auto; }
.cb-nut { fill: #1b1206; }
.cb-fret { stroke: #6b5f4d; stroke-width: 1.5; }
.cb-string { stroke: #2b2116; stroke-width: 1.3; }
.cb-base { font: 700 11px var(--font-body); fill: #1b1206; }
.cb-mute { font: 700 15px var(--font-body); text-anchor: middle; fill: #8a1712; }
.cb-open { fill: none; stroke: #1b1206; stroke-width: 2; }
.cb-open.root { stroke: var(--red); stroke-width: 3; }
.cb-dot circle { fill: #1b1206; }
.cb-dot.root circle { fill: var(--red); }
.cb-dot text { fill: #fff; font: 700 10px var(--font-body); text-anchor: middle; }
.cb-barre { fill: #1b1206; opacity: .85; }

/* ---------- Tab ---------- */
.tab-wrap { margin: 0; background: #0a0908; border: 1px solid #000; border-radius: 14px; padding: 12px 14px; }
.tab-title { font-family: var(--font-display); letter-spacing: .12em; color: var(--cream); font-size: 1.1rem; margin-bottom: 4px; }
.tab-scroll { overflow-x: auto; }
pre.tab { margin: 0; font-family: var(--font-mono); font-size: 15px; line-height: 1.5; color: #7d7466; }
.tab-row { white-space: pre; }
.tab-str { color: var(--muted); font-weight: 700; display: inline-block; width: 1.2ch; }
.tn { color: var(--cream); font-weight: 700; border-radius: 3px; transition: background .08s; }
.tn.on { background: var(--amber); color: #000; }
.tb { color: #4f483f; }
.tab-neck { margin-top: 10px; }

/* ---------- Stacks, ruler ---------- */
.stacks { display: flex; gap: 26px; flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.stack-title { font-family: var(--font-display); letter-spacing: .1em; color: var(--cream); }
.tower { display: flex; flex-direction: column; align-items: center; }
.brick { width: 130px; padding: 8px; text-align: center; background: var(--cream); color: #1b1206; border: 2px solid #000; border-radius: 8px; box-shadow: 0 3px 0 #000; }
.brick b { font-size: 1.3rem; color: #1b1206; display: block; line-height: 1; }
.brick small { font-size: .72rem; color: #5b4f3e; }
.brick.root { background: var(--red); } .brick.root b, .brick.root small { color: #fff; }
.gap { font-size: .8rem; color: var(--amber); font-weight: 700; margin: 4px 0; }
.ruler { display: grid; grid-template-columns: repeat(13, minmax(52px, 1fr)); gap: 4px; overflow-x: auto; }
.ruler-cell { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 2px; background: var(--panel2); border: 1px solid #000; border-radius: 8px; color: var(--cream); cursor: pointer; font-family: var(--font-body); }
.ruler-cell:hover { background: #332d27; }
.ruler-cell.perfect { border-top: 3px solid var(--teal); }
.ruler-cell.third { border-top: 3px solid var(--amber); }
.ruler-cell.tritone { border-top: 3px solid var(--red); }
.rc-fret { font-size: .7rem; color: var(--muted); }
.rc-short { font-family: var(--font-display); font-size: 1.25rem; letter-spacing: .05em; }
.rc-note { font-size: .82rem; color: var(--amber); }

/* ---------- Circle of fifths ---------- */
.circle-wrap { display: grid; grid-template-columns: minmax(260px, 400px) 1fr; gap: 22px; align-items: center; }
@media (max-width: 760px) { .circle-wrap { grid-template-columns: 1fr; } }
svg.circle5 { width: 100%; height: auto; }
.c5-seg { cursor: pointer; }
.c5-major { fill: #2a2520; stroke: #000; stroke-width: 2; }
.c5-minor { fill: #1c1915; stroke: #000; stroke-width: 2; }
.c5-seg:hover .c5-major, .c5-seg:focus .c5-major { fill: #3a332b; }
.c5-seg.in-key .c5-major { fill: #4a3b1f; }
.c5-seg.in-key .c5-minor { fill: #2f2a3a; }
.c5-seg.is-I .c5-major { fill: var(--red); }
.c5-seg.is-V .c5-major, .c5-seg.is-IV .c5-major { fill: #8a5a12; }
.c5-t1 { fill: var(--cream); font: 400 22px var(--font-display); letter-spacing: .04em; text-anchor: middle; pointer-events: none; }
.c5-t2 { fill: var(--muted); font: 600 12px var(--font-body); text-anchor: middle; pointer-events: none; }
.c5-seg.in-key .c5-t2 { fill: var(--purple); }
.c5-t3 { fill: #6f675b; font: 600 10px var(--font-body); text-anchor: middle; pointer-events: none; }
.c5-hub { fill: #0a0908; stroke: var(--amber); stroke-width: 2; }
.c5-hub1 { fill: var(--amber); font: 400 30px var(--font-display); text-anchor: middle; }
.c5-hub2 { fill: var(--muted); font: 600 11px var(--font-body); text-anchor: middle; letter-spacing: .2em; }
.circle-panel h4 { font-family: var(--font-display); font-size: 1.6rem; letter-spacing: .05em; font-weight: 400; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.chip { display: inline-flex; flex-direction: column; align-items: center; min-width: 58px; background: var(--panel2); color: var(--cream); border: 1px solid #000; border-radius: 10px; padding: 5px 9px; cursor: pointer; font-weight: 700; font-family: var(--font-body); }
.chip small { font-weight: 600; color: var(--amber); font-size: .72rem; }
.chip:hover { background: #3a332b; }
.chip.on { background: var(--amber); color: #000; } .chip.on small { color: #000; }

/* ---------- Tools common ---------- */
.tool-panel { background: linear-gradient(180deg, var(--panel2), var(--panel)); border: 1px solid #000; border-radius: 16px; padding: 18px; box-shadow: var(--shadow); margin: 16px 0; }
.controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; margin-bottom: 12px; }
.controls label { display: flex; flex-direction: column; gap: 4px; font-size: .78rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.big-readout { font-family: var(--font-display); font-size: 4rem; color: var(--cream); line-height: 1; }
.score { font-family: var(--font-display); font-size: 1.6rem; color: var(--amber); letter-spacing: .06em; }
.answer-grid { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.answer-grid button { min-width: 92px; }
.answer-grid button.right { background: var(--teal); color: #002018; }
.answer-grid button.wrong { background: #5a1410; color: #ffbcb4; }

/* Audio input picker */
.input-picker { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: end; padding: 12px 14px; margin: 10px 0; background: #0b0a09; border: 1px dashed var(--line); border-radius: 12px; }
.input-picker label { display: flex; flex-direction: column; gap: 4px; font-size: .74rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.input-picker .meter { align-self: center; }
.input-picker .ip-note { flex-basis: 100%; }
.ip-meters { display: flex; align-items: center; gap: 6px; }
.ip-meters .meter { width: 90px; }

/* Play-Along */
.pa-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 20px; align-items: start; }
@media (max-width: 1000px) { .pa-layout { grid-template-columns: 1fr; } }
.pa-side { position: sticky; top: 78px; }
.pa-side .tool-panel { margin-top: 0; }
.pa-sheet { height: 68vh; overflow-y: auto; background: #0a0908; border: 1px solid #000; border-radius: 14px; padding: 18px 20px 40vh; box-shadow: 0 0 0 1px #2b2621 inset; scroll-behavior: auto; }
.pa-sheet .widget { margin: 10px 0; }
.pa-sheet pre.tab { font-size: 1em; }
.pa-head { border-bottom: 1px solid var(--line); margin-bottom: 10px; padding-bottom: 6px; }
.pa-head h2 { margin: 0; }
.pa-line { margin: 0; font-family: var(--font-mono); font-size: 1em; line-height: 1.55; white-space: pre-wrap; color: var(--text); }
.pa-chords { color: var(--amber); }
.pa-chord { font: inherit; font-weight: 700; color: var(--amber); background: none; border: 0; padding: 0; cursor: pointer; border-bottom: 1px dotted var(--amber); }
.pa-chord:hover, .pa-chord:focus-visible { color: var(--cream); }
.pa-section { font-family: var(--font-display); letter-spacing: .14em; color: var(--red); font-size: 1.25em; margin: 18px 0 4px; }
.pa-gap { height: .8em; }
#pa-text { width: 100%; min-height: 260px; font-family: var(--font-mono); font-size: .9rem; background: #0b0a09; color: var(--cream); border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.sp-ctrls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 8px 0; }
.sp-now { display: flex; gap: 10px; align-items: center; min-height: 52px; }
.sp-now img, .sp-result img { width: 44px; height: 44px; border-radius: 6px; }
.sp-results { display: grid; gap: 6px; margin-top: 8px; max-height: 280px; overflow: auto; }
.sp-result { display: flex; gap: 10px; align-items: center; text-align: left; background: var(--panel2); border: 1px solid #000; border-radius: 10px; padding: 6px 8px; color: var(--cream); cursor: pointer; font: inherit; font-size: .88rem; }
.sp-result:hover { background: #3a332b; }

/* Tuner */
.tuner-meter { position: relative; height: 120px; max-width: 520px; margin: 10px auto; }
.tuner-scale { position: absolute; inset: auto 0 20px 0; height: 60px; background: repeating-linear-gradient(90deg, #4a443c 0 2px, transparent 2px 10%); border-bottom: 2px solid #4a443c; }
.tuner-center { position: absolute; left: 50%; bottom: 20px; width: 4px; height: 80px; margin-left: -2px; background: var(--teal); border-radius: 2px; }
.tuner-needle { position: absolute; left: 50%; bottom: 20px; width: 4px; height: 100px; margin-left: -2px; background: var(--red); border-radius: 2px; transform-origin: bottom center; transition: transform .1s; box-shadow: 0 0 10px var(--red); }
.tuner-needle.ok { background: var(--teal); box-shadow: 0 0 14px var(--teal); }

/* Jam room */
.jam-chords { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }
.jam-chord { font-family: var(--font-display); font-size: 2rem; letter-spacing: .04em; padding: 10px 18px; border-radius: 12px; background: var(--panel2); border: 2px solid #000; min-width: 92px; text-align: center; color: var(--cream); }
.jam-chord small { display: block; font-size: .9rem; color: var(--amber); letter-spacing: .1em; }
.jam-chord.now { background: var(--red); color: #fff; box-shadow: 0 0 22px rgba(224,49,42,.6); }
.jam-chord.now small { color: #fff; }
.beat-dots { display: flex; gap: 8px; }
.beat-dots i { width: 16px; height: 16px; border-radius: 50%; background: #2b2621; border: 1px solid #000; }
.beat-dots i.on { background: var(--amber); box-shadow: 0 0 10px var(--amber); }

/* ---------- Tone Lab (pedalboard) ---------- */
.rig-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.rig-card { cursor: pointer; text-align: left; font: inherit; color: inherit; }
.rig-card .genre { font-size: .78rem; letter-spacing: .14em; color: var(--amber); font-family: var(--font-display); }
.rig-card.active { box-shadow: 0 0 0 2px var(--amber), var(--shadow); }
.rig-swatch { display: flex; gap: 4px; margin: 6px 0 10px; }
.rig-swatch i { flex: 1; height: 8px; border-radius: 3px; border: 1px solid #000; }
.board {
  background: linear-gradient(180deg, #2b2b2b, #151515);
  border: 3px solid #000; border-radius: 16px; padding: 20px 16px 26px;
  box-shadow: 0 0 0 2px #444 inset, var(--shadow);
  overflow-x: auto;
}
.board-chain { display: flex; gap: 14px; align-items: stretch; min-width: min-content; }
.cable { align-self: center; width: 22px; height: 6px; background: #000; border-radius: 3px; flex: none; box-shadow: 0 1px 0 #444; }
.pedal {
  flex: none; width: 168px; border-radius: 14px; padding: 12px 10px 12px;
  background: var(--pc, #c33);
  border: 2px solid #000; box-shadow: 0 2px 0 rgba(255,255,255,.35) inset, 0 -3px 0 rgba(0,0,0,.25) inset, 0 6px 0 #000;
  display: flex; flex-direction: column; align-items: center; gap: 8px; color: #111;
  position: relative;
}
.pedal.off { filter: saturate(.25) brightness(.6); }
.pedal .p-name { font-family: var(--font-display); font-size: 1.25rem; letter-spacing: .08em; color: rgba(0,0,0,.85); text-shadow: 0 1px 0 rgba(255,255,255,.35); line-height: 1; text-align: center; }
.pedal .p-sub { font-size: .66rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: rgba(0,0,0,.6); margin-top: -6px; text-align: center; }
.pedal .knobs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 10px; }
.pedal .knobs.k3 { grid-template-columns: repeat(3, 1fr); }
.pedal .led { width: 10px; height: 10px; border-radius: 50%; background: #300; border: 1px solid #000; }
.pedal:not(.off) .led { background: #ff3b2f; box-shadow: 0 0 10px #ff3b2f; }
.footswitch { width: 42px; height: 42px; border-radius: 50%; background: var(--chrome); border: 2px solid #000; cursor: pointer; box-shadow: 0 3px 0 #000; }
.footswitch:active { transform: translateY(2px); box-shadow: 0 1px 0 #000; }
.pedal.amp { width: 300px; background: linear-gradient(180deg, #e9dcc0, #cbb88f); }
.pedal.amp::before { content: ''; position: absolute; left: 10px; right: 10px; bottom: 64px; height: 6px; background: repeating-linear-gradient(90deg, #6b5a3a 0 3px, transparent 3px 6px); opacity: .5; }
.pedal.amp .knobs { grid-template-columns: repeat(5, 1fr); }
.pedal.split { width: auto; min-width: 360px; background: #2f2f2f; color: var(--cream); }
.pedal.split > .p-name, .pedal.split > .p-sub { color: var(--cream); text-shadow: none; }
.split-lanes { display: flex; flex-direction: column; gap: 10px; width: 100%; }
.split-lane { display: flex; gap: 10px; align-items: center; background: rgba(0,0,0,.25); border-radius: 10px; padding: 8px; }
.split-lane .lane-tag { font-family: var(--font-display); color: var(--amber); writing-mode: vertical-rl; transform: rotate(180deg); letter-spacing: .1em; }
.knob { display: flex; flex-direction: column; align-items: center; gap: 2px; user-select: none; touch-action: none; }
.knob .dial {
  width: 40px; height: 40px; border-radius: 50%; cursor: ns-resize; position: relative;
  background: radial-gradient(circle at 40% 35%, #555, #111 70%); border: 2px solid #000;
  box-shadow: 0 3px 0 rgba(0,0,0,.6), 0 0 0 3px rgba(0,0,0,.15);
}
.pedal.amp .knob .dial { background: radial-gradient(circle at 40% 35%, #fff, #bbb 50%, #777); }
.knob .dial::after { content: ''; position: absolute; left: 50%; top: 4px; width: 3px; height: 13px; margin-left: -1.5px; background: #fff; border-radius: 2px; }
.pedal.amp .knob .dial::after { background: #111; }
.knob .dial:focus-visible { outline: 3px solid var(--amber); }
.knob span { font-size: .62rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: rgba(0,0,0,.75); }
.pedal.split > .knobs .knob span { color: var(--cream); }
.knob output { font-family: var(--font-mono); font-size: .62rem; color: rgba(0,0,0,.65); }
.pedal.split > .knobs .knob output { color: var(--muted); }
.src-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 12px 0; }
.meter { width: 160px; height: 10px; background: #000; border-radius: 6px; overflow: hidden; border: 1px solid #333; }
.meter i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--amber) 70%, var(--red)); transition: width .05s; }
.recipe { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.recipe > li { counter-increment: step; background: var(--panel); border: 1px solid #000; border-radius: 12px; padding: 12px 14px 12px 56px; position: relative; }
.recipe > li::before { content: counter(step); position: absolute; left: 14px; top: 12px; width: 30px; height: 30px; border-radius: 50%; background: var(--red); color: #fff; font-family: var(--font-display); font-size: 1.2rem; display: grid; place-items: center; }
.recipe .plug { font-weight: 700; color: var(--cream); }
.recipe .where { font-size: .78rem; color: var(--amber); letter-spacing: .06em; }
.recipe .settings { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.recipe .settings span { font-family: var(--font-mono); font-size: .78rem; background: #0b0a09; border: 1px solid var(--line); padding: 2px 7px; border-radius: 6px; color: var(--cream); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

.pathbox { font-family: var(--font-mono); font-size: .85rem; background: #000; border: 1px dashed var(--amber); border-radius: 8px; padding: 10px 12px; color: var(--cream); word-break: break-all; }
.signal-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 14px 0; }
.signal-flow span { background: var(--panel2); border: 1px solid #000; border-radius: 8px; padding: 6px 10px; font-weight: 600; font-size: .88rem; }
.signal-flow em { color: var(--amber); font-style: normal; }

.toast { position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%); background: var(--amber); color: #000; font-weight: 700; padding: 10px 18px; border-radius: 10px; box-shadow: var(--shadow); z-index: 200; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .page { padding: 18px 14px 60px; }
  .topbar { padding: 8px 14px; }
  .hero h1 { font-size: 3rem; }
}