/* The Fretboard Atlas companion. Palette and type follow the book (atlas/style.py).
   One shared set of components (buttons, fields, segmented controls, cards, panels, notices) is used by every view. */
:root {
  --bg: #fbf6ee; --card: #ffffff; --ink: #24211d; --muted: #6a6257; --rule: #e1dbd1; --rule-strong: #c9c2b7;
  --rust: #a54921; --teal: #2f5d62; --gold: #c8963e; --hl: #f5ecdd; --fret-bg: #f6eedf;
  --on-accent: #ffffff; --good: #2f6b3f; --bad: #a54921; --good-bg: #e6f0e8; --bad-bg: #f8e6dc;
  --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%236a6257' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  --sans: Poppins, "Helvetica Neue", Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --mono: ui-monospace, "JetBrains Mono", Menlo, monospace;
  --radius: 10px; --radius-sm: 8px;
  --control: 44px; --control-sm: 40px;
  --gap: 12px;
  --dock-h: 0px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1e1b17; --card: #2a2620; --ink: #f4ecdd; --muted: #b9ae9c; --rule: #3a342c; --rule-strong: #5a5145;
    --rust: #e08048; --teal: #79abb0; --gold: #d9ab55; --hl: #352d24; --fret-bg: #2f2a23;
    --on-accent: #1e1b17; --good: #86c493; --bad: #ec9466; --good-bg: #26352a; --bad-bg: #3d2a20;
    --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23b9ae9c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1e1b17; --card: #2a2620; --ink: #f4ecdd; --muted: #b9ae9c; --rule: #3a342c; --rule-strong: #5a5145;
  --rust: #e08048; --teal: #79abb0; --gold: #d9ab55; --hl: #352d24; --fret-bg: #2f2a23;
  --on-accent: #1e1b17; --good: #86c493; --bad: #ec9466; --good-bg: #26352a; --bad-bg: #3d2a20;
  --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23b9ae9c' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  color-scheme: dark;
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--serif); overflow-x: hidden;
  padding-bottom: var(--dock-h); }
[hidden] { display: none !important; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.sr { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 8px; top: -60px; background: var(--rust); color: var(--on-accent); padding: 8px 12px; border-radius: 6px; z-index: 50; font-family: var(--sans); }
.skip:focus { top: 8px; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
a { color: var(--teal); text-underline-offset: 2px; }
p { margin: 0 0 12px; }

h1 { font: 500 30px/1.15 var(--sans); margin: 28px 0 8px; }
h2 { font: 500 19px/1.3 var(--sans); color: var(--rust); margin: 32px 0 10px; }
h2 span, h2 .sub { color: var(--muted); font-weight: 400; }
h3 { font: 500 16px/1.3 var(--sans); margin: 20px 0 6px; }
.lead { color: var(--muted); font-style: italic; margin: 0 0 18px; max-width: 46em; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.hint { font: 400 14px/1.5 var(--serif); color: var(--muted); margin: 10px 0; max-width: 46em; }
.stack > * + * { margin-top: var(--gap); }

/* ---------- header and tabs ---------- */
header.site { background: var(--bg); }
.head { display: flex; justify-content: space-between; align-items: center; padding-top: 14px; padding-bottom: 6px; gap: 12px; }
.kicker { font: 500 12px/1 var(--sans); letter-spacing: .08em; color: var(--rust); text-transform: uppercase; }
.brand { font: 500 20px/1.2 var(--sans); margin: 6px 0 0; }
.brand a { color: inherit; text-decoration: none; }
nav.tabs { position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--rule); }
.tabs-inner { display: flex; gap: 2px; white-space: nowrap; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.tabs-inner::-webkit-scrollbar { display: none; }
.tabs.fade-end .tabs-inner { -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 40px), transparent); mask-image: linear-gradient(to right, #000 calc(100% - 40px), transparent); }
.tabs.fade-start .tabs-inner { -webkit-mask-image: linear-gradient(to left, #000 calc(100% - 40px), transparent); mask-image: linear-gradient(to left, #000 calc(100% - 40px), transparent); }
.tabs.fade-start.fade-end .tabs-inner { -webkit-mask-image: linear-gradient(to right, transparent, #000 40px, #000 calc(100% - 40px), transparent); mask-image: linear-gradient(to right, transparent, #000 40px, #000 calc(100% - 40px), transparent); }
.tabs a { font: 500 14px/1 var(--sans); color: var(--muted); text-decoration: none; padding: 0 10px; border-bottom: 3px solid transparent;
  min-height: 46px; display: inline-flex; align-items: center; flex: none; }
.tabs a:first-child { margin-left: -10px; }
.tabs a:hover { color: var(--ink); }
.tabs a[aria-current="page"] { color: var(--rust); border-bottom-color: var(--rust); }

main { padding-top: 4px; padding-bottom: 40px; outline: none; min-height: 60vh; }

/* ---------- buttons ---------- */
.btn { font: 500 15px/1.2 var(--sans); color: var(--ink); background: var(--card); border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm); padding: 0 16px; min-height: var(--control); cursor: pointer; display: inline-flex; align-items: center;
  justify-content: center; gap: 8px; text-decoration: none; white-space: nowrap; vertical-align: middle; -webkit-tap-highlight-color: transparent; }
.btn:hover { border-color: var(--muted); }
.btn.sm { min-height: var(--control-sm); padding: 0 12px; font-size: 14px; }
.btn.big { min-height: 48px; padding: 0 22px; font-size: 16px; }
.btn.ghost { background: transparent; }
.btn.link { background: none; border-color: transparent; color: var(--teal); text-decoration: underline; text-underline-offset: 3px; padding: 0 2px; }
.btn.link:hover { border-color: transparent; color: var(--ink); }
.btn.primary { background: var(--rust); border-color: var(--rust); color: var(--on-accent); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.primary[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); }
.btn.toggle[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); color: var(--on-accent); }
.btn.round { width: 48px; height: 48px; min-height: 48px; border-radius: 50%; font-size: 22px; padding: 0; }
.btn[disabled] { opacity: .5; cursor: default; }
.btn[disabled]:hover { border-color: var(--rule-strong); }
.btn:has(input:focus-visible) { outline: 3px solid var(--gold); outline-offset: 2px; }
.btn svg { flex: none; }

/* ---------- fields ---------- */
.controls { display: flex; flex-wrap: wrap; gap: 14px 16px; align-items: flex-end; margin: 14px 0; font: 400 14px var(--sans); }
.controls.tight { gap: 10px; }
.field { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font: 400 14px/1.2 var(--sans); min-width: 0; max-width: 100%; }
.field.grow { flex: 1 1 260px; }
.check { display: inline-flex; flex-direction: row; align-items: center; gap: 10px; color: var(--ink); min-height: var(--control); font: 400 15px var(--sans); cursor: pointer; }
.row-end { margin-left: auto; display: inline-flex; gap: 10px; flex-wrap: wrap; }
select, input[type=search], input[type=number] {
  font: 400 15px/1.2 var(--sans); color: var(--ink); background-color: var(--card); border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm); padding: 0 12px; min-height: var(--control); max-width: 100%; }
select { -webkit-appearance: none; appearance: none; padding-right: 36px; background-image: var(--chevron); background-repeat: no-repeat;
  background-position: right 12px center; cursor: pointer; text-overflow: ellipsis; }
select:hover, input[type=search]:hover { border-color: var(--muted); }
input[type=search] { width: 100%; }
input[type=search]::placeholder { color: var(--muted); opacity: 1; }
input[type=range] { accent-color: var(--rust); min-height: 32px; }
input[type=checkbox], input[type=radio] { accent-color: var(--rust); width: 18px; height: 18px; margin: 0; flex: none; }
fieldset.plain { border: 0; padding: 0; margin: 0; min-width: 0; }
fieldset.plain legend { padding: 0; }

/* segmented control: radio inputs hidden, the labels are the segments */
.seg { display: inline-flex; border: 1px solid var(--rule-strong); border-radius: var(--radius-sm); padding: 3px; margin: 0;
  background: var(--card); min-height: var(--control); gap: 2px; min-width: 0; }
.seg legend { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.seg label { position: relative; display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; min-width: 64px;
  border-radius: 6px; font: 500 14px/1 var(--sans); color: var(--ink); cursor: pointer; white-space: nowrap; flex: 1 1 auto; }
.seg label:hover { background: var(--hl); }
.seg input { position: absolute; opacity: 0; inset: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.seg label:has(input:checked) { background: var(--rust); color: var(--on-accent); }
.seg label:has(input:focus-visible) { outline: 3px solid var(--gold); outline-offset: 1px; }

/* ---------- cards, panels, notices ---------- */
.card { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 14px 16px; }
details.panel { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); margin: 12px 0 18px; }
details.panel > summary { font: 500 15px var(--sans); cursor: pointer; min-height: var(--control); display: flex; align-items: center; gap: 10px;
  padding: 0 16px; list-style: none; border-radius: var(--radius); }
details.panel > summary::-webkit-details-marker { display: none; }
details.panel > summary::before { content: ""; width: 12px; height: 8px; flex: none; background: var(--chevron) no-repeat center; transform: rotate(-90deg); transition: transform .15s; }
details.panel[open] > summary::before { transform: none; }
details.panel > summary .sub { color: var(--muted); font-weight: 400; }
details.panel > .panel-body { padding: 4px 16px 14px; border-top: 1px solid var(--rule); }
.notice { background: var(--hl); border-left: 3px solid var(--gold); padding: 12px 16px; border-radius: var(--radius-sm); font-size: 15px; margin: 12px 0; max-width: 46em; }
.notice.error { border-left-color: var(--bad); }
.empty { text-align: center; padding: 28px 18px; border: 1px dashed var(--rule-strong); border-radius: var(--radius); background: transparent; max-width: 640px; }
.empty p { margin: 0 0 14px; font: 400 16px/1.5 var(--serif); }
.empty .btn { margin-top: 2px; }
.badge { font: 600 11px/1 var(--sans); letter-spacing: .05em; text-transform: uppercase; color: var(--teal); border: 1px solid currentColor;
  border-radius: 999px; padding: 4px 8px; display: inline-block; }
.meter { height: 6px; background: var(--rule); border-radius: 3px; overflow: hidden; min-width: 60px; }
.meter i { display: block; height: 100%; background: var(--teal); }
.kbd { font: 500 11px var(--mono); border: 1px solid currentColor; border-radius: 4px; padding: 2px 5px; opacity: .8; }

/* ---------- home intro ---------- */
.intro { margin: 22px 0 0; padding: 16px 18px; background: var(--hl); border-radius: var(--radius); display: flex; flex-wrap: wrap;
  gap: 14px 20px; align-items: center; justify-content: space-between; }
.intro p { margin: 0; font-size: 16px; flex: 1 1 340px; }
.download { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; }
.download .meta-line { font: 400 12px var(--sans); color: var(--muted); }

/* ---------- tracks ---------- */
.chapter-bar { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; justify-content: space-between;
  border: 1px solid var(--rust); border-radius: var(--radius); padding: 8px 8px 8px 16px; margin: 14px 0; background: var(--card); }
.chapter-bar h2 { margin: 0; outline: none; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin: 14px 0; font: 400 14px var(--sans); }
.toolbar .grow { flex: 1 1 260px; }
.chapter > h2 { margin-top: 28px; }
.filtered .chapter > h2 { display: none; }
.track { display: grid; grid-template-columns: auto 1fr auto; gap: 6px 14px; align-items: center;
  background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 12px 14px; margin: 8px 0; scroll-margin: 80px 0 120px; }
.track.current { border-color: var(--rust); background: var(--hl); }
.play { width: 44px; height: 44px; border-radius: 50%; border: 0; background: var(--rust); color: var(--on-accent); cursor: pointer;
  display: grid; place-items: center; flex: none; padding: 0; }
.play svg { width: 16px; height: 16px; fill: currentColor; }
.play[aria-pressed=true] { background: var(--teal); }
.meta { min-width: 0; }
.num { font: 600 11px var(--sans); color: var(--rust); letter-spacing: .06em; text-transform: uppercase; }
.title { font: 500 15px/1.3 var(--sans); overflow-wrap: anywhere; }
.kind { color: var(--muted); font-size: 14px; }
.opts { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.bar { position: relative; grid-column: 1 / -1; height: 6px; background: var(--rule); border-radius: 3px; overflow: hidden; cursor: pointer; }
.bar i { display: block; height: 100%; width: 0; background: var(--rust); }
.bar .region { position: absolute; top: 0; bottom: 0; z-index: 1; pointer-events: none;
  background: color-mix(in srgb, var(--teal) 30%, transparent); box-shadow: inset 2px 0 0 var(--teal), inset -2px 0 0 var(--teal); }
.track .loop-note { grid-column: 1 / -1; color: var(--muted); font-size: 13px; margin: 0; }
.track .err { grid-column: 1 / -1; color: var(--bad); font-size: 14px; margin: 0; }

.dock { position: fixed; left: 0; right: 0; bottom: 0; background: var(--card); border-top: 1px solid var(--rule); z-index: 30;
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom)); font: 400 14px var(--sans); box-shadow: 0 -4px 16px rgb(0 0 0 / .06); }
.dock-inner { display: flex; gap: 8px 14px; align-items: center; flex-wrap: wrap; min-height: 44px; }
.dock-meta { flex: 1 1 160px; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dock-meta .num { margin-right: 6px; }
.dock .speed { display: flex; gap: 10px; align-items: center; color: var(--muted); }
.dock .speed input { width: 140px; }
.dock output { min-width: 3.5em; color: var(--ink); font-variant-numeric: tabular-nums; }
.dock .rate-hint { flex: 1 1 100%; margin: 0; color: var(--muted); font-size: 13px; }

/* ---------- footer ---------- */
footer.site { border-top: 1px solid var(--rule); margin-top: 24px; }
footer.site .wrap { padding-top: 18px; padding-bottom: 24px; font: 400 13px/1.6 var(--sans); color: var(--muted); }
footer.site p { margin: 0 0 6px; max-width: 60em; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--ink); }
footer.site .links { display: flex; flex-wrap: wrap; gap: 4px 16px; }

/* ---------- fretboard ---------- */
.scroller { overflow-x: auto; -webkit-overflow-scrolling: touch; background: var(--fret-bg); border: 1px solid var(--rule); border-radius: var(--radius); padding: 10px 6px; }
.scroller svg { display: block; }
.view-head { display: flex; flex-wrap: wrap; gap: 2px 14px; align-items: baseline; margin: 26px 0 10px; }
.view-head h2 { margin: 0; }
.view-head p { margin: 0; }
.fb text { font-family: var(--sans); }
.fb-fret { stroke: var(--rule-strong); stroke-width: 2; }
.fb-nut { stroke: var(--ink); stroke-width: 6; }
.fb-string { stroke: var(--muted); }
.fb-inlay { fill: var(--rule-strong); }
.fb-num { fill: var(--muted); font-size: 11px; }
.fb-label { fill: var(--ink); font-size: 13px; font-weight: 500; }
.fb-label.muted { fill: var(--muted); }
.fb-dot circle { fill: var(--teal); stroke: var(--fret-bg); stroke-width: 2; }
.fb-dot text { fill: var(--on-accent); font-size: 11px; font-weight: 600; pointer-events: none; }
.fb-dot.root circle { fill: var(--rust); }
.fb-dot[role=button] { cursor: pointer; }
.fb-dot[role=button]:hover circle { stroke: var(--gold); }
.fb-dot.sounding circle { stroke: var(--gold); stroke-width: 4; }
.fb-dot:focus-visible { outline: none; }
.fb-dot:focus-visible circle { stroke: var(--gold); stroke-width: 4; }
.fb-cell { fill: transparent; cursor: pointer; }
.fb-cell:hover { fill: var(--hl); fill-opacity: .7; }
.fb-cell:focus-visible { outline: none; stroke: var(--gold); stroke-width: 3; }
.fb-dot.pick { pointer-events: none; }
.fb-dot.pick circle { fill: var(--ink); }
.fb-dot.pick.root circle { fill: var(--rust); }
.fb-dot.pick text { fill: var(--bg); }
.fb-dot.pick.root text { fill: var(--on-accent); }

/* ---------- sub-tabs (Chords, Ear trainer) ---------- */
.subtabs { display: flex; gap: 4px; border-bottom: 1px solid var(--rule); margin: 10px 0 16px; overflow-x: auto; scrollbar-width: none; }
.subtabs::-webkit-scrollbar { display: none; }
.subtabs button { font: 500 14px var(--sans); background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted);
  padding: 0 12px; min-height: var(--control); cursor: pointer; white-space: nowrap; flex: none; }
.subtabs button:first-child { margin-left: -12px; }
.subtabs button:hover { color: var(--ink); }
.subtabs button[aria-selected="true"] { color: var(--rust); border-bottom-color: var(--rust); }

/* ---------- chord boxes ---------- */
.boxes { display: grid; grid-template-columns: repeat(auto-fill, minmax(148px, 1fr)); gap: 12px; }
.boxbtn { position: relative; background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 30px 6px 12px; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 6px; color: var(--ink); font: 400 12px var(--sans); }
.boxbtn:hover { border-color: var(--rust); }
.boxbtn.standard { border-color: var(--rule-strong); }
.boxbtn .frets { font: 500 13px var(--mono); color: var(--muted); letter-spacing: .04em; }
.boxbtn .badge { position: absolute; top: 8px; left: 8px; }
.box text { font-family: var(--sans); }
.box-fret, .box-string { stroke: var(--muted); stroke-width: 1.2; }
.box-nut { stroke: var(--ink); stroke-width: 5; }
.box-dot { fill: var(--ink); }
.box-dot.root { fill: var(--rust); }
.box-open { fill: none; stroke: var(--ink); stroke-width: 1.6; }
.box-open.root { stroke: var(--rust); }
.box-mark, .box-start, .box-note { fill: var(--muted); font-size: 12px; }
.box-mark { font-size: 15px; }
.box-title { fill: var(--ink); font-size: 13px; font-weight: 600; }
.more-row { margin: 16px 0 0; }
.result { margin: 18px 0; }
.result .name { font: 500 34px/1.2 var(--sans); color: var(--rust); margin: 0 0 6px; }
.result .alt { font-size: 15px; }
.result .shape { font: 500 14px var(--mono); color: var(--muted); }

/* ---------- metronome ---------- */
.metro { max-width: 560px; }
.bpm-row { display: flex; align-items: center; gap: 18px; margin: 14px 0 4px; }
.bpm { font: 500 64px/1 var(--sans); min-width: 3ch; text-align: center; font-variant-numeric: tabular-nums; }
.bpm::after { content: " bpm"; font-size: 16px; color: var(--muted); }
.range-field { display: block; font: 400 14px var(--sans); color: var(--muted); margin: 14px 0; }
.range-field input { display: block; width: 100%; margin-top: 6px; }
.beats { display: flex; gap: 10px; margin: 22px 0; flex-wrap: wrap; min-height: 34px; align-items: center; }
.beats .beat { width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--rule-strong); transition: background .05s, transform .05s; }
.beats .beat.accent { border-color: var(--rust); }
.beats .beat.on { background: var(--teal); border-color: var(--teal); transform: scale(1.12); }
.beats .beat.accent.on { background: var(--rust); border-color: var(--rust); }
.beats .sub { width: 10px; height: 10px; border-radius: 50%; background: var(--rule-strong); }
.beats .sub.on { background: var(--gold); }
.status { font: 400 14px var(--sans); color: var(--muted); min-height: 1.5em; margin: 8px 0; }

/* ---------- tuner ---------- */
.tuner { max-width: 520px; }
#tu-gauge { width: 100%; max-width: 420px; display: block; margin: 8px auto 0; }
.gauge-arc { stroke: var(--rule-strong); stroke-width: 3; }
.tick { stroke: var(--muted); stroke-width: 1.5; }
.tick.mid { stroke: var(--teal); stroke-width: 3; }
.tick-label { fill: var(--muted); font: 400 10px var(--sans); }
.needle { stroke: var(--rust); stroke-width: 3; stroke-linecap: round; transform-origin: 150px 150px; transition: transform .12s ease-out; }
.needle.in-tune { stroke: var(--teal); }
.needle-hub { fill: var(--ink); }
.readout { text-align: center; }
.tu-note { font: 500 54px/1.1 var(--sans); min-height: 1.1em; }
.tu-note.idle { color: var(--rule-strong); }
.tu-cents { font: 500 16px var(--sans); color: var(--muted); }
.tu-cents.in-tune { color: var(--teal); }
.tu-freq { font: 400 13px var(--sans); color: var(--muted); min-height: 1.4em; }
.strings { display: flex; gap: 8px; justify-content: center; margin: 16px 0; flex-wrap: wrap; }
.strings span { font: 500 14px var(--sans); border: 1px solid var(--rule-strong); border-radius: var(--radius-sm); padding: 0 10px; min-width: 44px; min-height: 40px;
  display: inline-flex; align-items: center; justify-content: center; background: var(--card); }
.strings span.near { border-color: var(--rust); color: var(--rust); }
.strings span.near.in-tune { border-color: var(--teal); background: var(--teal); color: var(--on-accent); }

/* ---------- ear trainer ---------- */
.optgrid { display: flex; flex-wrap: wrap; gap: 0 18px; margin: 6px 0; }
.optgrid label, .optrow label { display: inline-flex; align-items: center; gap: 8px; min-height: var(--control-sm); font: 400 14px var(--sans); cursor: pointer; }
.optrow { display: flex; flex-wrap: wrap; gap: 4px 18px; align-items: center; margin: 6px 0; font: 400 14px var(--sans); }
.optrow .label { color: var(--muted); }
.opt-legend { font: 500 13px var(--sans); color: var(--muted); margin: 12px 0 2px; }
.quiz .controls { margin-top: 0; }
.prompt { font: 500 17px/1.4 var(--sans); min-height: 1.5em; margin: 16px 0 12px; }
.answers { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 8px; max-width: 720px; }
.answers .btn { white-space: normal; text-align: center; min-height: 52px; line-height: 1.25; padding: 6px 10px; }
.answers .btn.right { background: var(--good); border-color: var(--good); color: var(--on-accent); opacity: 1; }
.answers .btn.wrong { background: var(--bad); border-color: var(--bad); color: var(--on-accent); opacity: 1; }
.answers .btn[disabled]:not(.right):not(.wrong) { opacity: .55; }
.answers.idle .btn[disabled] { opacity: .7; }
.feedback { font: 500 16px var(--sans); min-height: 1.6em; margin: 14px 0; }
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--bad); }
.scoreline { display: flex; gap: 8px 24px; flex-wrap: wrap; font: 400 14px var(--sans); color: var(--muted); padding: 10px 0; border-top: 1px solid var(--rule); }
.scoreline b { color: var(--ink); font-weight: 600; }
table.stats { border-collapse: collapse; width: 100%; font: 400 14px var(--sans); }
table.stats th, table.stats td { text-align: left; padding: 8px; border-bottom: 1px solid var(--rule); }
table.stats th { color: var(--muted); font-weight: 500; }
table.stats td:last-child { width: 40%; }

/* ---------- flashcards ---------- */
.fc-chapters { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0 16px; font: 400 14px var(--sans); margin: 4px 0; }
.fc-chapters label { display: flex; gap: 10px; align-items: center; min-height: var(--control-sm); cursor: pointer; }
.fc-summary { font: 400 15px var(--sans); margin: 4px 0 10px; }
.fc-boxes { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin: 8px 0 18px; max-width: 520px; }
.fc-box { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius-sm); padding: 8px 4px; text-align: center;
  display: flex; flex-direction: column; gap: 2px; font: 400 12px var(--sans); color: var(--muted); }
.fc-box b { font-size: 20px; font-weight: 500; color: var(--ink); line-height: 1.2; }
.fc-card { background: var(--card); border: 1px solid var(--rule); border-left: 4px solid var(--gold); border-radius: var(--radius); padding: 18px 20px;
  min-height: 180px; cursor: pointer; max-width: 640px; }
.fc-card .meta-line { font: 400 13px var(--sans); color: var(--muted); margin: 0 0 10px; }
.fc-front { font: 500 22px/1.35 var(--sans); }
.fc-back { font-size: 19px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--rule); }
.fc-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; max-width: 640px; }
.fc-knew { border-color: var(--good); color: var(--good); }
.fc-missed { border-color: var(--bad); color: var(--bad); }

/* ---------- year plan ---------- */
.plan-bar { display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center; margin: 14px 0 6px; }
.plan-bar .row-end .btn { min-width: 168px; }
.progress { margin: 10px 0; font: 400 14px var(--sans); }
.progress .meter { height: 8px; border-radius: 4px; margin-top: 6px; }
.progress .meter i { background: var(--rust); }
.quarter { margin: 30px 0; }
.quarter h2 { margin-bottom: 4px; }
.quarter .goal { color: var(--muted); font-size: 15px; margin: 0 0 8px; max-width: 46em; }
.quarter .progress .meter i { background: var(--teal); }
.week { display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 12px 16px; margin: 8px 0; }
.week.done { background: var(--hl); }
.week .wcheck { grid-row: 1 / span 2; display: flex; align-items: flex-start; }
.week .wcheck input { width: 24px; height: 24px; margin: 0; }
.week .wcheck label { display: grid; place-items: center; width: 40px; height: 40px; margin: -8px -8px 0; cursor: pointer; }
.week .wk { font: 500 15px/1.35 var(--sans); cursor: pointer; padding-top: 1px; }
.week .wk .num { margin-right: 6px; }
.week dl { margin: 4px 0 0; display: grid; grid-template-columns: max-content 1fr; gap: 2px 14px; font-size: 15px; }
.week dt { font: 500 12px/1.9 var(--sans); color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.week dd { margin: 0; }
.week.done .wk { text-decoration: line-through; text-decoration-color: var(--muted); }

/* ---------- small screens ---------- */
@media (max-width: 600px) {
  body { font-size: 16px; }
  h1 { font-size: 26px; margin-top: 22px; }
  .head { padding-top: 12px; }
  .brand { font-size: 18px; }
  .track { grid-template-columns: auto 1fr; padding: 12px; }
  .opts { grid-column: 1 / -1; }
  .week dl { grid-template-columns: 1fr; }
  .week dt { line-height: 1.4; margin-top: 6px; }
  .bpm { font-size: 52px; }
  .dock .speed { flex: 1 1 100%; }
  .dock .speed input { flex: 1; width: auto; }
  .controls > .field:not(.grow) { flex: 1 1 140px; }
  .controls > .field select { width: 100%; }
  .controls > .field.wide { flex-basis: 100%; }
  .plan-bar .seg { flex: 1 1 100%; }
  .plan-bar .row-end { margin-left: 0; flex: 1 1 100%; display: grid; grid-template-columns: 1fr 1fr; }
  .plan-bar .row-end .btn { min-width: 0; padding: 0 10px; }
  .boxes { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .answers { grid-template-columns: repeat(2, 1fr); }
  .fc-actions .btn { flex: 1 1 0; }
  .fc-card { padding: 16px; }
  .fc-front { font-size: 20px; }
  .result .name { font-size: 30px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
.boxbtn svg { max-width: 100%; height: auto; }
footer.site .links a { display: inline-flex; align-items: center; min-height: 40px; }
.brand a { display: inline-flex; align-items: center; min-height: 40px; margin: -8px 0; }
input[type=range] { min-height: 40px; }
.fc-summary:empty, .status:empty { display: none; }

/* ---------- weather companion ---------- */
:root { --sea: #e9f0ef; --land: #f2e9d8; --coast: #b3a68f; --cold: #2f5f9a; --warm: #b23b2a; --occl: #6c3f80; --iso: #24211d; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --sea: #1f2b2c; --land: #3a342b; --coast: #6d6352; --cold: #7ea6d8; --warm: #e5826f; --occl: #b58fc9; --iso: #e9e2d6; } }
:root[data-theme="dark"] { --sea: #1f2b2c; --land: #3a342b; --coast: #6d6352; --cold: #7ea6d8; --warm: #e5826f; --occl: #b58fc9; --iso: #e9e2d6; }
.chart-wrap { border: 1px solid var(--rule); border-radius: var(--radius-sm); overflow: hidden; background: var(--sea); }
.wx-chart { display: block; width: 100%; height: auto; cursor: crosshair; touch-action: manipulation; }
.wx-sea { fill: var(--sea); }
.wx-land { fill: var(--land); stroke: var(--coast); stroke-width: .6; }
.wx-iso { fill: none; stroke: var(--iso); stroke-width: .9; opacity: .85; }
.wx-iso.major { stroke-width: 1.5; }
.wx-iso-label { font: 500 11px var(--sans); fill: var(--iso); text-anchor: middle; paint-order: stroke; stroke: var(--sea); stroke-width: 4px; }
.wx-front { fill: none; stroke-width: 2.6; stroke-linecap: round; }
.fr-cold { stroke: var(--cold); fill: var(--cold); }
.fr-warm { stroke: var(--warm); fill: var(--warm); }
.fr-occl { stroke: var(--occl); fill: var(--occl); }
.fr-stat { stroke: var(--warm); }
.fr-trough { stroke: var(--iso); stroke-dasharray: 7 4; }
path.wx-front.fr-cold, path.wx-front.fr-warm, path.wx-front.fr-occl, path.wx-front.fr-stat, path.wx-front.fr-trough { fill: none; }
.wx-sym { stroke: none; }
.wx-barb { fill: var(--iso); stroke: var(--iso); stroke-width: 1.1; fill-opacity: 0; }
path.wx-barb { fill-opacity: 1; }
.wx-barb-dot { fill: var(--iso); }
.wx-centre { font: 700 30px var(--sans); text-anchor: middle; dominant-baseline: middle; }
.wx-centre.low, .wx-centre-p.low { fill: var(--rust); }
.wx-centre.high, .wx-centre-p.high { fill: var(--teal); }
.wx-centre-p { font: 600 13px var(--sans); text-anchor: middle; }
.wx-pick { fill: none; stroke: var(--gold); stroke-width: 3; }
.readout-card { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius-sm); padding: 12px 16px; margin: 12px 0; }
.readout-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px 18px; }
.readout-grid .lbl { display: block; font: 500 12px var(--sans); color: var(--muted); }
.readout-grid b { font: 600 20px/1.3 var(--sans); }
.subtabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 14px; }
.subtabs [role=tab] { font: 500 14px var(--sans); border: 1px solid var(--rule-strong); background: var(--card); color: var(--ink); border-radius: 999px; padding: 8px 14px; min-height: var(--control-sm); cursor: pointer; }
.subtabs [role=tab][aria-selected=true] { background: var(--teal); border-color: var(--teal); color: var(--on-accent); }
.controls input[type=number], .controls input[type=datetime-local] { font: 400 16px var(--sans); color: var(--ink); background: var(--card); border: 1px solid var(--rule-strong); border-radius: var(--radius-sm); min-height: var(--control); padding: 0 10px; width: 10em; }
.table-wrap { overflow-x: auto; }
table.data { border-collapse: collapse; width: 100%; font: 400 14px/1.4 var(--serif); }
table.data th { font: 500 13px var(--sans); text-align: left; background: var(--ink); color: var(--bg); padding: 6px 8px; }
table.data td { border-bottom: 1px solid var(--rule); padding: 6px 8px; vertical-align: top; }
table.data tr.current td { background: var(--hl); font-weight: 600; }
.ap-wrap { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-start; }
.wx-vec { width: 300px; max-width: 100%; background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius-sm); }
.ap-hull { fill: var(--ink); }
.wx-vec line { stroke-width: 3; }
.ap-true { stroke: var(--teal); } .ap-boat { stroke: var(--muted); } .ap-app { stroke: var(--rust); }
.ap-l { font: 500 12px var(--sans); } .ap-l.true { fill: var(--teal); } .ap-l.boat { fill: var(--muted); } .ap-l.app { fill: var(--rust); }
.wx-trace { display: block; width: 100%; height: auto; margin: 10px 0; background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius-sm); }
.tr-title { font: 500 12px var(--sans); fill: var(--ink); }
.tr-grid { stroke: var(--rule); stroke-width: 1; }
.tr-tick { font: 400 11px var(--sans); fill: var(--muted); }
.tr-now { stroke: var(--gold); stroke-width: 2; stroke-dasharray: 4 3; }
.tr-line { fill: none; stroke-width: 2; stroke: var(--ink); }
.tr-line.wind { stroke: var(--rust); } .tr-line.gust { stroke: var(--gold); stroke-dasharray: 3 3; }
.tr-line.wave { stroke: var(--teal); } .tr-line.swell { stroke: var(--muted); stroke-dasharray: 4 3; }
.cloud-fig { margin: 0 0 12px; }
.cloud-fig img { width: 100%; max-width: 600px; height: auto; border-radius: var(--radius-sm); border: 1px solid var(--rule); display: block; }
.answers { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.answers .btn.good { background: var(--good-bg); border-color: var(--good); color: var(--good); }
.answers .btn.bad { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
.feedback { min-height: 1.5em; font-size: 16px; }
.scoreline { font: 500 14px var(--sans); color: var(--muted); }
.cloud-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.cloud-card { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius); padding: 10px 12px; }
.cloud-card img { width: 100%; height: auto; border-radius: var(--radius-sm); display: block; }
.cloud-card h3 { margin: 10px 0 2px; }
.rya-list { list-style: none; padding: 0; margin: 0; }
.rya-list li { background: var(--card); border: 1px solid var(--rule); border-radius: var(--radius-sm); padding: 10px 14px; margin: 8px 0; }
.rya-list .check { align-items: flex-start; color: var(--ink); font: 400 16px/1.45 var(--serif); }