/* Drumbug — offline lesson player */
:root {
  --bg: #0b0d12;
  --bg2: #11141c;
  --panel: #151924;
  --panel2: #1b2130;
  --border: #232b3d;
  --text: #e8ecf4;
  --muted: #7a8499;
  --accent: #ff4d6d;
  --accent2: #ffb347;
  --good: #4ade80;
  --ok: #fbbf24;
  --bad: #f87171;
  --lane-colors: #ff4d6d, #ffb347, #4ade80, #38bdf8, #a78bfa, #f472b6, #2dd4bf, #facc15, #fb923c, #60a5fa;
  --radius: 10px;
}

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

html, body {
  height: 100%;
  background: radial-gradient(1200px 600px at 70% -10%, #161b2a 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Segoe UI", "Inter", system-ui, -apple-system, sans-serif;
  overflow: hidden;
}

/* Classic chrome — the retired "advanced view" — must NEVER paint, not even
   for the frames between first paint and the game shell / landing opening
   (that pre-JS window was the flicker seen on refresh and on sign-in). Game
   mode is the app; the shell borrows whatever it needs via moveIn(). */
#app { display: none !important; }

/* ---------- header ---------- */
#topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 10px 18px;
  background: linear-gradient(180deg, var(--panel) 0%, var(--bg2) 100%);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 8px; }
.logo { color: var(--accent); font-size: 20px; text-shadow: 0 0 12px var(--accent); }
/* clickable brand — re-opens the landing page */
.brand.home-btn {
  cursor: pointer;
  border-radius: 8px;
  padding: 5px 9px;
  margin-left: -9px;
  user-select: none;
  transition: background .15s ease, box-shadow .15s ease;
}
.brand.home-btn:hover { background: var(--panel2); box-shadow: 0 0 0 1px var(--border); }
.brand.home-btn:active { transform: translateY(1px); }
.brand.home-btn:focus-visible { outline: none; box-shadow: 0 0 0 2px var(--accent); }
.brand-name { font-weight: 800; letter-spacing: 3px; font-size: 15px; }
.brand-sub { color: var(--muted); font-size: 11px; letter-spacing: 1px; }
.lesson-meta { display: flex; flex-direction: column; min-width: 0; }
.lesson-meta #lessonTitle { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-meta #lessonArtist { font-size: 12px; }
.top-controls { display: flex; align-items: center; gap: 12px; margin-left: auto; flex-wrap: wrap; }

.switch { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 12px; cursor: pointer; user-select: none; }
.switch input { accent-color: var(--accent); cursor: pointer; }

select, button.btn {
  background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 10px; font-size: 12.5px; cursor: pointer;
  transition: border-color .15s, transform .05s;
}
select:hover, button.btn:hover { border-color: var(--accent); }
button.btn:active { transform: translateY(1px); }
button.btn.primary {
  background: linear-gradient(135deg, var(--accent), #ff7a5c);
  border: none; color: #fff; font-weight: 700;
  box-shadow: 0 4px 18px -6px rgba(255, 77, 109, .6);
}
button.btn.primary:hover { filter: brightness(1.1); }
button.btn:disabled { opacity: .45; cursor: default; }

/* ---------- playbar ---------- */
#playbar {
  display: flex; align-items: center; gap: 14px;
  padding: 8px 18px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}
#playBtn { min-width: 86px; }
#restartBtn { min-width: 38px; }
.progress { position: relative; flex: 1; height: 6px; background: var(--panel2); border-radius: 4px; overflow: visible; cursor: pointer; }
.progress #progressFill { position: absolute; inset: 0 auto 0 0; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 4px; }
.progress #stepMarks { position: absolute; inset: -3px 0; pointer-events: none; }
.step-mark { position: absolute; top: 0; bottom: 0; width: 1px; background: rgba(255,255,255,.28); }
#timeLabel { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 12.5px; min-width: 92px; text-align: right; }

.score-box { display: flex; align-items: baseline; gap: 8px; min-width: 210px; justify-content: flex-end; }
.combo { font-size: 26px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; min-width: 44px; }
.score-box .muted { font-size: 11px; }
.acc { font-size: 15px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stars { letter-spacing: 2px; color: var(--accent2); font-size: 14px; }

/* ---------- stage ---------- */
#stage { flex: 1; display: flex; flex-direction: column; min-height: 0; }

/* overview strip spans the full width on top; game + side panel share the rest */
#overviewWrap { flex: none; position: relative; height: 64px; background: var(--bg2); border-bottom: 1px solid var(--border); }
#stageRow { flex: 1; display: flex; min-height: 0; }
.overview { position: absolute; inset: 8px 12px; }
/* overview children are absolutely positioned by inline styles (step marks use
   .ov-step, note ticks use .ov-note) — no strips/backgrounds */
.overview .ov-step, .overview .ov-note { position: absolute; }
#overviewPlayhead { position: absolute; top: 4px; bottom: 4px; width: 2px; background: #fff; box-shadow: 0 0 8px rgba(255,255,255,.8); }
/* the user's own strikes, overlaid on the note timeline as glowing white dots
   (x = when they hit, y = which drum lane) — distinct from the colored notes */
#hitMarks { position: absolute; inset: 8px 12px; pointer-events: none; }
.ov-hit {
  position: absolute; width: 6px; height: 6px; border-radius: 50%;
  background: #fff; box-shadow: 0 0 6px rgba(255,255,255,.9);
}

#gameWrap { position: relative; flex: 1; min-height: 0; }
#game { width: 100%; height: 100%; display: block; cursor: crosshair; }
/* ---------- real song audio backing (Songsterr-style) ---------- */
#audioBar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 6px 14px; background: var(--panel2); border-bottom: 1px solid var(--border);
  font-size: 12.5px;
}
#audioBar .audio-emoji { font-size: 14px; }
#audioBar .audio-name { font-weight: 700; color: var(--text); }
#audioBar .audio-sync { font-size: 11.5px; }
#audioBar .audio-nudge { display: inline-flex; gap: 6px; margin-left: auto; }
#audioBar .audio-switch { margin-left: 4px; }
button.btn.mini { padding: 2px 8px; font-size: 11px; }

/* vertical hit line — notes scroll right → left into it */
#hitline { position: absolute; top: 0; bottom: 0; width: 3px; background: linear-gradient(180deg, transparent, var(--accent2), transparent); box-shadow: 0 0 14px var(--accent2); pointer-events: none; }

#laneLabels {
  position: absolute; top: 0; bottom: 0; left: 0; right: 0;
  pointer-events: none; z-index: 2;  /* anchor to the top of the game area and sit above the canvas — with only left/right set, the container hangs at the flow bottom (height 0) and every label renders off-screen */
}
.lane-label { position: absolute; display: flex; align-items: center; text-align: left; font-size: 10.5px; color: var(--muted); letter-spacing: .5px; text-transform: uppercase; font-weight: 700; overflow: hidden; white-space: nowrap; }

#padButtons { position: absolute; left: 0; right: 0; bottom: 0; display: flex; gap: 10px; justify-content: center; padding: 10px; pointer-events: none; }
#padButtons button {
  pointer-events: auto; width: 54px; height: 54px; border-radius: 50%;
  border: 2px solid var(--border); background: var(--panel2); color: var(--text);
  font-size: 10px; font-weight: 800; letter-spacing: .5px; cursor: pointer;
  transition: transform .05s, background .1s, box-shadow .1s;
}
#padButtons button:hover { border-color: var(--accent); }
#padButtons button.active { background: var(--accent); box-shadow: 0 0 22px var(--accent); transform: scale(1.08); border-color: #fff; }

#centerMessage {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800; letter-spacing: 2px; pointer-events: none;
  text-shadow: 0 2px 24px rgba(0,0,0,.8);
  transition: opacity .3s;
}
#centerMessage.hidden { opacity: 0; }
#centerMessage.perfect { color: var(--good); }
#centerMessage.good { color: var(--ok); }
#centerMessage.miss { color: var(--bad); }

.perf-overlay {
  position: fixed;
  top: 108px;
  right: 14px;
  z-index: 85;
  min-width: 220px;
  max-width: 280px;
  background: rgba(11, 13, 18, 0.92);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  padding: 10px 12px;
  font: 12px/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
  pointer-events: none;
}
.perf-overlay .perf-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-weight: 700;
  letter-spacing: .4px;
}
.perf-overlay pre {
  margin: 0;
  white-space: pre-wrap;
}

/* ---------- side panel ---------- */
#sidepanel { width: 250px; background: var(--bg2); border-left: 1px solid var(--border); padding: 14px; overflow-y: auto; display: flex; flex-direction: column; gap: 18px; }
#sidepanel h3 { font-size: 11px; letter-spacing: 2px; color: var(--muted); text-transform: uppercase; margin-bottom: 8px; }
.stat { display: flex; justify-content: space-between; padding: 4px 0; font-size: 13px; }
.stat-label { color: var(--muted); }
.stat-value { font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-value.good { color: var(--good); }
.stat-value.ok { color: var(--ok); }
.stat-value.bad { color: var(--bad); }

.steps { list-style: none; }
.steps li {
  font-size: 12px; padding: 5px 8px; border-left: 3px solid var(--border);
  margin-bottom: 4px; color: var(--muted); border-radius: 0 6px 6px 0; cursor: pointer;
  transition: background .15s, border-color .15s;
}
.steps li:hover { background: var(--panel); }
.steps li.current { border-left-color: var(--accent); color: var(--text); background: var(--panel); }
/* progression gating: locked parts stay dimmed with a 🔒 until the previous
   part is completed (the full-lesson finale unlocks when every part is done) */
.steps li.locked { opacity: .55; cursor: not-allowed; }
.steps li.locked:hover { background: transparent; border-left-color: var(--border); }
.steps li.locked.current { border-left-color: var(--border); color: var(--muted); background: var(--panel); }
.step-lock { font-size: 11px; filter: grayscale(.2); }
.steps li .step-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.steps li .step-stars { color: var(--accent2); font-size: 11px; letter-spacing: 1px; white-space: nowrap; }
.steps li .step-meta { font-size: 10px; color: var(--muted); }

#midiStatus { font-size: 12px; line-height: 1.5; }

/* ---------- library ---------- */
#libraryOverlay .dialog.wide { max-width: 720px; width: 94%; max-height: 86vh; display: flex; flex-direction: column; }
.dialog-head { display: flex; align-items: baseline; gap: 14px; justify-content: space-between; }
.library-toolbar { display: flex; gap: 10px; margin: 12px 0; flex-wrap: wrap; }
.library-toolbar input[type=text] {
  flex: 1; min-width: 200px; background: var(--panel2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px; font-size: 13px;
}
.library-toolbar input[type=text]:focus { outline: none; border-color: var(--accent); }
.library-toolbar select { font-size: 12px; }
.library-toolbar .btn { font-size: 12px; }
.library-toolbar .btn.on { border-color: var(--accent); color: var(--accent); }
.library-list { overflow-y: auto; flex: 1; min-height: 180px; display: flex; flex-direction: column; gap: 6px; }
.tab-upload-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0;
  flex-wrap: wrap;
}
.tab-upload-row .btn {
  font-size: 12px;
}
.lesson-item {
  display: flex; align-items: center; gap: 12px; padding: 9px 12px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 9px;
  cursor: pointer; transition: border-color .15s, transform .05s;
}
.lesson-item:hover { border-color: var(--accent); }
.lesson-item:active { transform: scale(.995); }
.lesson-item .thumb {
  position: relative;   /* the locked 🔒 / done ✓ badges are inset:0 absolute ::after layers — without this they anchor to the page and cover the whole library, blocking every click */
  width: 44px; height: 44px; border-radius: 6px; background: var(--panel);
  background-size: cover; background-position: center; flex: none;
  display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 20px;
}
.lesson-item .info { flex: 1; min-width: 0; }
.lesson-item .info .l-title { font-weight: 600; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-item .info .l-sub { font-size: 11.5px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-item .badges { display: flex; gap: 5px; align-items: center; flex: none; }
.grade-badge {
  min-width: 26px; text-align: center; padding: 2px 6px; border-radius: 5px;
  font-size: 11px; font-weight: 800; background: linear-gradient(135deg, var(--accent2), var(--accent)); color: #0b0d12;
}
.genre-chip { font-size: 10px; padding: 2px 7px; border-radius: 20px; border: 1px solid var(--border); color: var(--muted); }
.local-badge { font-size: 10px; padding: 2px 7px; border-radius: 20px; background: rgba(74,222,128,.15); color: var(--good); border: 1px solid rgba(74,222,128,.4); }
.lesson-item .load-hint { font-size: 10.5px; color: var(--muted); }

/* ---------- MIDI tabs overlay: search + grade sort toolbar ---------- */
.tab-toolbar { display: flex; gap: 8px; align-items: center; padding: 2px 0 10px; }
.tab-toolbar input[type=text] {
  flex: 1; min-width: 0;
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 7px; padding: 7px 11px; font-size: 12.5px;
  transition: border-color .15s;
}
.tab-toolbar input[type=text]:focus { outline: none; border-color: var(--accent); }
.tab-toolbar select {
  flex: none;
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 7px; padding: 7px 8px; font-size: 12.5px; cursor: pointer;
}
.tab-toolbar select:hover { border-color: var(--accent); }
.lesson-item .g-chip {
  font-size: 10.5px; font-weight: 700; letter-spacing: .3px;
  color: var(--accent); border: 1px solid var(--accent); border-radius: 6px;
  padding: 2px 7px; white-space: nowrap; flex: none;
}
.lesson-item .g-chip.lock { color: var(--muted); border-color: var(--border); font-weight: 600; }

/* ---------- overlay / dialog ---------- */
/* Every modal backdrop is a fixed, full-screen, centered layer. Keep this
   shared rule in sync with #overlay: if one of these ever loses its fixed
   positioning it renders in-flow at the bottom of the page and piles up on
   top of the others (open the profile/settings dialog, then the library —
   the profile's checkbox ends up covering the lesson list). */
#midiOverlay, #libraryOverlay, #tabOverlay, #profileOverlay, #coachOverlay, #introOverlay, #upgradeOverlay,
#overlay {
  position: fixed; inset: 0; background: rgba(5,7,12,.85); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
/* tall cards (a long coach take, a big tip) must scroll the OVERLAY, not clip
   at the top — margin:auto on the card centers it when it fits, and collapses
   to 0 when it is taller than the viewport so it scrolls from the top */
/* align-items:flex-start + margin:auto = centered when the card fits, but a
   card TALLER than the viewport collapses its auto margins to 0, aligns to
   the start and scrolls — without it, flex centering would clip the head */
#resultOverlay, #introOverlay { align-items: flex-start; overflow-y: auto; }
#resultOverlay .dialog, #introOverlay .dialog { margin: auto; }

/* ---------- lesson intro: first-time description of a lesson/part ---------- */
.dialog.intro { max-width: 460px; }

/* ---------- coach persona + style picks (profile dialog) ---------- */
.coach-picker { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 8px; }
.coach-opt {
  display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 12px 8px;
  border-radius: 14px; cursor: pointer; font: inherit; color: var(--text);
  background: var(--panel2); border: 1.5px solid var(--border);
  transition: transform .12s ease, border-color .12s ease, box-shadow .12s ease;
}
.coach-opt:hover { transform: translateY(-2px); }
.coach-opt.sel {
  border-color: var(--cc, #f472b6);
  background: color-mix(in srgb, var(--cc, #f472b6) 16%, var(--panel2));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--cc, #f472b6) 32%, transparent);
}
.co-ava { font-size: 26px; line-height: 1.2; }
.co-name { font-weight: 800; font-size: 14px; }
.co-vibe { font-size: 10.5px; opacity: .6; text-align: center; }
.style-picker { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.style-chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 13px; border-radius: 999px;
  font: inherit; font-size: 12.5px; font-weight: 700; cursor: pointer;
  color: var(--text); background: var(--panel2); border: 1.5px solid var(--border);
  transition: border-color .12s ease, background .12s ease, transform .12s ease;
}
.style-chip:hover { transform: translateY(-1px); }
.style-chip.sel {
  border-color: var(--sc, #38bdf8);
  background: color-mix(in srgb, var(--sc, #38bdf8) 18%, var(--panel2));
  box-shadow: 0 0 10px -2px var(--sc, #38bdf8);
}
/* library: "my styles" filter chip */
.lib-my-styles {
  display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px;
  color: var(--muted); cursor: pointer; white-space: nowrap; padding: 6px 10px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
}
.lib-my-styles input { accent-color: var(--accent); cursor: pointer; }
.lib-my-styles:has(input:checked) { color: var(--text); border-color: var(--accent); }
/* result card: persona voice line (above the AI tip block) */
.result-coach-line {
  margin: 10px auto 2px; max-width: 420px; font-style: italic; font-size: 13.5px;
  color: #b39dff; text-align: center;
}
.result-coach-line:before { content: "— "; opacity: .6; }
.result-coach-line:after { content: " —"; opacity: .6; }
.intro-blurb { font-size: 13.5px; line-height: 1.65; color: var(--text); margin: 6px 0 16px; }
/* first-open lesson card: the sub-lesson you're about to play, shown under
   the lesson's own blurb with a divider so the two read as distinct bits */
.intro-firstpart { margin: 4px 0 16px; padding-top: 12px; border-top: 1px solid var(--border); }
.intro-firstpart h3 { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.intro-firstpart .intro-blurb { margin: 0; }
.intro-preview-hint { margin: -10px 0 14px; font-size: 12px; font-weight: 600; color: var(--accent); }
.intro-trains h3 { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.intro-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.intro-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600; padding: 5px 11px; border-radius: 999px;
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
}
.intro-chip::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--chip-color, var(--accent)); }
.intro-badge {
  font-size: 10.5px; font-weight: 700; letter-spacing: .6px; text-transform: uppercase;
  padding: 3px 9px; border-radius: 999px; background: var(--panel2);
  border: 1px solid var(--border); color: var(--accent); white-space: nowrap;
}
.intro-songs { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); }
.intro-songs h3 { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.intro-songs-list { display: grid; gap: 7px; }
.intro-song {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 10px;
  background: var(--panel2); border: 1px solid var(--border);
  color: var(--text);
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.intro-song:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(0,0,0,.25); }
.intro-song .intro-song-link {
  display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0;
  color: var(--text); text-decoration: none;
}
.intro-song .is-t { font-weight: 700; font-size: 13px; white-space: nowrap; }
.intro-song .is-a { font-size: 12px; color: var(--muted); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.intro-song .is-go { font-size: 11px; font-weight: 700; color: var(--accent); letter-spacing: .4px; }
.intro-song .is-play {
  border: 0; border-radius: 8px; padding: 7px 11px;
  font-size: 11px; font-weight: 700; cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff; white-space: nowrap; transition: filter .15s, transform .05s;
}
.intro-song .is-play:hover { filter: brightness(1.12); }
.intro-song .is-play:active { transform: translateY(1px); }
.intro-songs-note { margin-top: 7px; font-size: 11px; color: var(--muted); }
.intro-coach { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); }
.intro-coach h3 { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.intro-coach-text { font-size: 13px; line-height: 1.6; color: var(--text); font-style: italic; margin-bottom: 8px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.section-head h3 { margin: 0; }
.dialog {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px; max-width: 520px; width: 90%; max-height: 90vh; overflow-y: auto;
  box-shadow: 0 30px 80px rgba(0,0,0,.6);
}
.dialog h2 { margin-bottom: 8px; }
.dialog .muted { font-size: 12.5px; line-height: 1.55; margin-bottom: 14px; }
.dialog code { background: var(--panel2); padding: 2px 5px; border-radius: 4px; font-size: 11px; }
.dropzone {
  border: 2px dashed var(--border); border-radius: 10px; padding: 26px;
  text-align: center; color: var(--muted); cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: rgba(255,77,109,.06); }
.dialog-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
#loadStatus { margin-top: 12px; font-size: 12px; white-space: pre-wrap; }
.hidden { display: none !important; }

.upgrade-dialog { max-width: 540px; }
.upgrade-copy {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  margin: 6px 0 14px;
}
.upgrade-details {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}
.upgrade-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
}
.upgrade-pill.accent {
  color: var(--accent2);
  border-color: rgba(255, 179, 71, .45);
  background: rgba(255, 179, 71, .08);
}
.upgrade-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.membership-card {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 77, 109, .08), rgba(56, 189, 248, .05));
}
.membership-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.membership-title {
  font-size: 15px;
  font-weight: 800;
  margin-top: 4px;
}
.membership-copy {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}
.account-status {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 12px;
  line-height: 1.5;
}
.account-status.neutral {
  background: rgba(122, 132, 153, .12);
  color: #c6cedd;
}
.account-status.info {
  background: rgba(56, 189, 248, .12);
  border-color: rgba(56, 189, 248, .3);
  color: #cfeeff;
}

/* ---------- public-account auth dialog (sign-in / create / reset) ---------- */
/* A modal that can be summoned from the game shell too — the shell sits at
   z-index 9000 (game.css), so this must NOT join the z-50 shared overlay list
   above or it would render underneath the shell in game mode. */
#authOverlay {
  position: fixed; inset: 0; background: rgba(5, 7, 12, .88); backdrop-filter: blur(7px);
  display: flex; align-items: flex-start; justify-content: center; z-index: 10000;
  overflow-y: auto;
}
#authOverlay .dialog { margin: auto; max-width: 410px; width: 92%; }
#authOverlay .dialog-head h2 { font-size: 17px; }
.auth-mode-row { display: flex; gap: 5px; background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; padding: 4px; margin: 2px 0 12px; }
.auth-mode-btn {
  flex: 1; border: none; background: transparent; color: var(--muted);
  font: inherit; font-size: 12.5px; font-weight: 700; padding: 7px 8px;
  border-radius: 7px; cursor: pointer; transition: background .15s, color .15s;
}
.auth-mode-btn:hover { color: var(--text); }
.auth-mode-btn.sel { background: var(--panel2); color: var(--text); }
.auth-note { font-size: 12.5px; line-height: 1.55; margin-bottom: 10px; }
.auth-row { margin-bottom: 10px; }
.auth-label {
  display: block; font-size: 10.5px; font-weight: 800; letter-spacing: .7px;
  text-transform: uppercase; color: var(--muted); margin-bottom: 4px;
}
.auth-input {
  width: 100%; background: var(--bg2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 11px; font-size: 13.5px; font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.auth-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255, 77, 109, .15); }
.auth-error, .auth-info {
  font-size: 12px; line-height: 1.5; padding: 8px 10px;
  border-radius: 8px; margin: 2px 0 10px;
}
.auth-error { background: rgba(255, 77, 109, .12); border: 1px solid rgba(255, 77, 109, .35); color: #ffd6de; }
.auth-info { background: rgba(56, 189, 248, .12); border: 1px solid rgba(56, 189, 248, .35); color: #d4efff; }
.auth-submit { width: 100%; padding: 9px; font-size: 13.5px; margin-top: 2px; }
.auth-submit:disabled { opacity: .55; cursor: progress; }
.auth-alt { display: flex; justify-content: center; gap: 16px; margin-top: 10px; }
.auth-link {
  background: none; border: none; color: var(--muted); font: inherit;
  font-size: 12px; cursor: pointer; text-decoration: underline; text-underline-offset: 3px;
}
.auth-link:hover { color: var(--accent); }
.auth-foot { font-size: 11px; text-align: center; margin: 12px 0 0; }
.account-status.success {
  background: rgba(74, 222, 128, .12);
  border-color: rgba(74, 222, 128, .3);
  color: #d9ffe5;
}
.account-status.warn {
  background: rgba(245, 158, 11, .12);
  border-color: rgba(245, 158, 11, .3);
  color: #ffe6bf;
}
.account-status.error {
  background: rgba(255, 77, 109, .12);
  border-color: rgba(255, 77, 109, .32);
  color: #ffd5de;
}
.membership-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

/* ---------- header chips ---------- */
.grade-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 5px 10px; cursor: pointer; transition: border-color .15s;
  color: var(--text); font-family: inherit;  /* buttons default to black UA text — restore the theme color */
}
.grade-chip:hover { border-color: var(--accent); }
.grade-label { font-size: 12px; font-weight: 700; white-space: nowrap; }
.grade-bar { width: 64px; height: 6px; border-radius: 3px; background: var(--panel); overflow: hidden; }
#gradeFill { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .5s; }
.grade-count { font-size: 10.5px; color: var(--muted); white-space: nowrap; }

/* ---------- level chip (Drumbug XP progression) ---------- */
.level-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 5px 10px; cursor: pointer; transition: border-color .15s;
  color: var(--text); font-family: inherit;  /* buttons default to black UA text — restore the theme color */
}
.level-chip:hover { border-color: var(--accent2); }
.level-label { font-size: 12px; font-weight: 800; white-space: nowrap; }
.level-bar { width: 64px; height: 6px; border-radius: 3px; background: var(--panel); overflow: hidden; }
#levelFill { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent2), #facc15); transition: width .5s; }
.level-xp { font-size: 10.5px; color: var(--muted); white-space: nowrap; }

/* ---------- practice stats + drum controls (settings dialog) ---------- */
.practice-stats {
  display: flex; align-items: center; gap: 10px; margin-top: 14px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; flex-wrap: wrap;
}
.ps-level { font-size: 13px; font-weight: 800; white-space: nowrap; }
.ps-xp-bar { flex: 1; min-width: 90px; height: 8px; border-radius: 4px; background: var(--panel); overflow: hidden; }
#psXpFill { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent2), #facc15); transition: width .4s; }
.ps-xp { font-size: 12px; font-weight: 700; white-space: nowrap; }
.ps-time { font-size: 11px; color: var(--muted); white-space: nowrap; }
.ps-streak { font-size: 11.5px; font-weight: 800; color: var(--muted); white-space: nowrap; }
.ps-streak.on { color: #ff9f43; text-shadow: 0 0 10px rgba(255,159,67,.45); }
.ps-goal { font-size: 11.5px; font-weight: 800; color: var(--muted); white-space: nowrap; }
.ps-goal.on { color: var(--good); text-shadow: 0 0 10px rgba(70,200,120,.35); }
.settings-col { flex-direction: column; align-items: flex-start; gap: 8px; }
.settings-col .muted { margin-bottom: 0; }
.drum-controls { display: flex; flex-direction: column; gap: 6px; width: 100%; max-width: 460px; }
.drum-row { display: flex; align-items: center; gap: 8px; }
.dr-label { width: 96px; flex: none; font-size: 12px; font-weight: 600; }
.dr-pad { flex: 1; min-width: 0; font-size: 11.5px; color: var(--accent2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#drumLearnStatus { font-size: 11.5px; }
#drumLearnStatus.recording { color: var(--accent); font-weight: 700; }

.user-chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 20px;
  padding: 4px 12px 4px 5px; cursor: pointer; transition: border-color .15s;
  color: var(--text); font-family: inherit;  /* buttons default to black UA text — restore the theme color */
}
.user-chip:hover { border-color: var(--accent); }
.user-avatar {
  width: 24px; height: 24px; border-radius: 50%; flex: none;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; color: #0b0d12;
}
.user-name { font-size: 12.5px; font-weight: 600; max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.caret { font-size: 10px; color: var(--muted); }

/* ---------- result / completion popup ---------- */
#resultOverlay { position: fixed; inset: 0; background: rgba(5,7,12,.82); backdrop-filter: blur(5px); display: flex; align-items: center; justify-content: center; z-index: 70; }
.result-card {
  position: relative; background: var(--panel); border: 1px solid var(--border); border-radius: 18px;
  padding: 30px 38px 26px; width: 420px; max-width: 92vw; text-align: center;
  box-shadow: 0 30px 80px rgba(0,0,0,.65); animation: cardIn .35s ease-out;
}
@keyframes cardIn { from { transform: translateY(26px) scale(.95); opacity: 0; } to { transform: none; opacity: 1; } }
.result-confetti { position: absolute; inset: 0; pointer-events: none; overflow: hidden; border-radius: 18px; }
.confetto { position: absolute; top: -14px; width: 8px; height: 13px; border-radius: 2px; opacity: 0; }
.confetto.fly { animation-name: confettoFall; animation-timing-function: cubic-bezier(.3, .1, .8, .4); animation-fill-mode: forwards; }
@keyframes confettoFall { to { transform: translateY(380px) rotate(560deg); opacity: .95; } }
.result-title { font-size: 15px; letter-spacing: 3px; font-weight: 800; color: var(--accent); text-transform: uppercase; }
.result-sub { font-size: 13px; color: var(--muted); margin-top: 4px; min-height: 18px; }
.result-stars { display: flex; justify-content: center; gap: 14px; margin: 18px 0 6px; }
.rstar { font-size: 48px; line-height: 1; color: #2a2f3d; opacity: 0; }
.rstar.on { opacity: 1; color: var(--accent2); text-shadow: 0 0 26px var(--accent2); animation: starPop .55s cubic-bezier(.2, 1.7, .4, 1) forwards; }
.rstar:nth-child(1).on { animation-delay: .2s; }
.rstar:nth-child(2).on { animation-delay: .5s; }
.rstar:nth-child(3).on { animation-delay: .8s; }
@keyframes starPop { 0% { transform: scale(0) rotate(-50deg); } 60% { transform: scale(1.35) rotate(10deg); } 100% { transform: scale(1) rotate(0); } }
.result-score { font-size: 46px; font-weight: 800; font-variant-numeric: tabular-nums; margin: 8px 0 2px; }
.result-score .result-total { font-size: 16px; color: var(--muted); font-weight: 600; }
.result-card.platinum .result-score { color: #e5f3ff; text-shadow: 0 0 30px rgba(120, 200, 255, .8); }
.result-best { min-height: 20px; font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--good); text-transform: uppercase; }
/* result card: XP earned this run + practice streak */
.result-xp { margin: 10px 0 2px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: rgba(255,255,255,.03); }
.rxp-line { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; }
.rxp-total { color: var(--accent); font-size: 15px; white-space: nowrap; }
.rxp-prog { display: flex; align-items: center; gap: 8px; margin-top: 8px; font-size: 11.5px; color: var(--muted); }
.rxp-bar { flex: 1; height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; min-width: 40px; }
.rxp-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--good)); border-radius: 3px; }
.rxp-up { margin-top: 7px; font-size: 12px; font-weight: 800; color: var(--good); animation: starPop .4s ease; }
.rxp-streak { margin-top: 6px; font-size: 12px; color: #ff9f43; font-weight: 700; }
.result-stats { display: flex; justify-content: space-between; gap: 6px; margin: 16px 0 4px; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.rstat { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 52px; }
.rstat span:first-child { font-size: 17px; font-weight: 800; font-variant-numeric: tabular-nums; }
.rstat .rstat-label { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.rstat .good { color: var(--good); } .rstat .ok { color: var(--ok); } .rstat .bad { color: var(--bad); }
.result-actions { display: flex; justify-content: center; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.result-actions .btn { padding: 8px 16px; }
/* the button a Kick press will click — gold ring like the pickers' focused items */
.result-actions .btn.focused {
  border-color: #facc15;
  box-shadow: 0 0 0 2px rgba(250, 204, 21, .55), 0 0 16px rgba(250, 204, 21, .4);
  transform: translateY(-1px);
}
.result-nav-hint { margin-top: 12px; font-size: 11px; color: var(--muted); letter-spacing: .3px; }

/* ---------- users / profile ---------- */
.user-list { display: flex; flex-direction: column; gap: 6px; margin: 10px 0; }
.user-row {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 9px; cursor: pointer;
  transition: border-color .15s;
}
.user-row:hover { border-color: var(--accent); }
.user-row.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.user-row .user-avatar { width: 30px; height: 30px; font-size: 14px; }
.user-row .u-name { flex: 1; font-weight: 600; font-size: 13px; }
.user-row .u-meta { font-size: 10.5px; color: var(--muted); }
.user-row .u-del { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 15px; padding: 2px 6px; border-radius: 6px; }
.user-row .u-del:hover { color: var(--bad); background: rgba(248,113,113,.12); }
.add-user-row { display: flex; gap: 8px; margin: 8px 0 4px; }
.add-user-row input {
  flex: 1; background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 10px; font-size: 13px;
}
.add-user-row input:focus { outline: none; border-color: var(--accent); }
.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.settings-row select#sf2Picker { max-width: 280px; }
#sf2Status { font-size: 11px; opacity: .75; }
#sf2Quick { max-width: 180px; }
@media (max-width: 900px) { #sf2Quick { max-width: 130px; } }

/* ---------- MIDI monitor + pad remap ---------- */
.midi-monitor {
  display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px;
  max-height: 64px; overflow: hidden;
}
.midi-monitor .hit-chip {
  font-size: 10.5px; padding: 2px 6px; border-radius: 6px;
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  animation: chipIn .15s ease-out;
}
.midi-monitor .hit-chip.unmapped { border-color: var(--bad); color: var(--bad); }

/* MIDI status line becomes a clickable retry target when access was refused */
#midiStatus.midi-retry { cursor: pointer; color: var(--accent); text-decoration: underline dotted; }
#midiStatus.midi-retry:hover { color: var(--accent2); }
@keyframes chipIn { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.midi-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 12px 0; }
@media (max-width: 900px) { .midi-cols { grid-template-columns: 1fr; } }
.midi-col h3 { font-size: 13px; margin-bottom: 8px; color: var(--text); }
.midi-log {
  background: var(--panel); border: 1px solid var(--border); border-radius: 9px;
  min-height: 180px; max-height: 260px; overflow-y: auto; padding: 8px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 12px;
}
.midi-log .ml-row { display: flex; gap: 8px; padding: 2px 4px; border-radius: 5px; }
.midi-log .ml-row:hover { background: var(--panel2); }
.midi-log .ml-note { color: var(--accent); font-weight: 700; min-width: 34px; }
.midi-log .ml-name { color: var(--text); flex: 1; }
.midi-log .ml-vel { color: var(--muted); min-width: 44px; text-align: right; }
.midi-log .ml-unmapped { color: var(--bad); }

.remap-list { display: flex; flex-direction: column; gap: 6px; max-height: 300px; overflow-y: auto; }
.remap-row {
  display: flex; align-items: center; gap: 10px; padding: 7px 10px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; transition: border-color .15s, box-shadow .15s;
}
.remap-row:hover { border-color: var(--accent); }
.remap-row.learning { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 0 14px rgba(255,77,109,.25); }
.remap-row .rp-lane { flex: 1; font-weight: 600; font-size: 13px; }
.remap-row .rp-pad {
  font-size: 11px; color: var(--muted);
  background: var(--panel); border: 1px dashed var(--border); border-radius: 6px; padding: 2px 8px;
}
.remap-row .rp-pad.mapped { color: var(--good); border-style: solid; border-color: var(--good); }
.remap-row .rp-status { font-size: 10.5px; color: var(--muted); }

/* ---------- AI Coach overlay ---------- */
#coachOverlay .dialog.wide { max-width: 760px; width: 94%; max-height: 88vh; display: flex; flex-direction: column; }
.coach-level { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; }
.coach-badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 7px 14px;
  background: linear-gradient(135deg, rgba(255,77,109,.16), rgba(255,179,71,.12));
  border: 1px solid rgba(255,77,109,.35); border-radius: 12px;
  box-shadow: 0 0 18px rgba(255,77,109,.15);
}
.coach-badge .cb-lvl {
  font-size: 17px; font-weight: 800; color: var(--accent);
  background: var(--panel2); padding: 3px 9px; border-radius: 8px;
}
.coach-badge .cb-name { font-weight: 700; font-size: 14px; }
.coach-sub { margin: 0; }
.coach-commentary {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 9px;
  padding: 10px 12px; margin-bottom: 12px; font-size: 12.5px; line-height: 1.6;
}
.coach-commentary p { margin: 0 0 4px; }
.coach-commentary p:last-child { margin: 0; }
.coach-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 8px 0 12px; }
@media (max-width: 900px) { .coach-cols { grid-template-columns: 1fr; } }
.coach-col h3 { font-size: 13px; margin-bottom: 8px; color: var(--text); }
.radar-wrap { display: flex; justify-content: center; margin-bottom: 6px; }
#coachRadar { max-width: 100%; height: auto; }
.trend-wrap { margin-top: 12px; }
.trend-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.trend-head h3 { font-size: 13px; margin: 0; color: var(--text); }
.trend-head select {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; font-size: 11px; padding: 2px 6px; max-width: 150px;
}
.trend-head select:hover { border-color: var(--accent); }
#coachTrend {
  display: block; width: 100%; height: 110px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 9px;
}
#coachTrendHint { font-size: 11px; margin-top: 4px; }
#coachAiStatus { font-size: 11.5px; }
.result-coach {
  display: flex; align-items: center; gap: 10px; margin: 12px 0 4px;
  background: rgba(255,77,109,.08); border: 1px solid rgba(255,77,109,.25);
  border-radius: 9px; padding: 8px 12px; font-size: 12.5px;
  max-height: 120px; overflow-y: auto;   /* a long LLM tip must never blow up the card */
}
.result-coach .rc-tip { flex: 1; line-height: 1.45; }
.skill-bars { display: flex; flex-direction: column; gap: 5px; max-height: 300px; overflow-y: auto; }
.skill-row {
  display: grid; grid-template-columns: 96px 1fr 38px 58px; align-items: center; gap: 8px;
  padding: 3px 6px; border-radius: 6px; font-size: 12px;
}
.skill-row:hover { background: var(--panel2); }
.sk-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sk-name::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--sk, var(--accent)); margin-right: 6px; }
.sk-track { background: var(--panel); border-radius: 5px; height: 7px; overflow: hidden; }
.sk-fill { display: block; height: 100%; border-radius: 5px; min-width: 2px; transition: width .5s ease; }
.sk-val { text-align: right; font-variant-numeric: tabular-nums; }
.sk-conf { font-size: 10.5px; white-space: nowrap; }
.weak-list, .rec-list { display: flex; flex-direction: column; gap: 5px; max-height: 220px; overflow-y: auto; }
.weak-row, .rec-row, .drill-row {
  display: flex; align-items: center; gap: 9px; padding: 6px 9px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  font-size: 12.5px; transition: border-color .15s;
}
.weak-row:hover, .rec-row:hover, .drill-row:hover { border-color: var(--accent); }
.w-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.w-name { font-weight: 600; flex: 1; }
.w-pct { font-variant-numeric: tabular-nums; }
.rec-title { font-weight: 600; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rec-meta { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.drill-gen { display: flex; align-items: center; gap: 10px; margin: 8px 0; flex-wrap: wrap; }
.coach-recommend { margin: 4px 0 2px; }
.coach-recommend-card {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; margin-bottom: 8px; flex-wrap: wrap;
  background: linear-gradient(135deg, rgba(255,77,109,.14), rgba(255,179,71,.08));
  border: 1px solid rgba(255,77,109,.4); border-radius: 10px;
  transition: border-color .15s, transform .05s;
}
.coach-recommend-card:hover { border-color: var(--accent); }
.coach-recommend-card:active { transform: scale(.995); }
.coach-recommend-card .cr-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.coach-recommend-card .cr-label { font-size: 10px; letter-spacing: 1.5px; color: var(--accent); font-weight: 800; text-transform: uppercase; }
.coach-recommend-card .cr-skill { font-size: 13.5px; font-weight: 700; }
.coach-recommend-card .btn { flex: none; }
/* inline "generating" state on the skill-row buttons: spinner + label, disabled */
button.btn.gen-loading, button.gen-btn.gen-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.spinner {
  display: inline-block;
  width: 13px;
  height: 13px;
  flex: none;
  border: 2px solid rgba(255, 255, 255, .35);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.drill-list { display: flex; flex-direction: column; gap: 5px; max-height: 200px; overflow-y: auto; }
.d-title { font-weight: 600; flex: 1; }
.d-meta { flex: 1; }
.drills-empty { color: var(--muted); font-size: 12.5px; }
.ai-advanced { gap: 8px; }
.ai-advanced input { flex: 1; min-width: 120px; }
.settings-row input[type=password], .settings-row input[type=text] {
  background: var(--panel); border: 1px solid var(--border); border-radius: 7px;
  color: var(--text); padding: 6px 9px; font-size: 12px; flex: 1; min-width: 140px;
}

/* ---------- library: grade path ---------- */
.next-up {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(255,77,109,.16), rgba(255,179,71,.1));
  border: 1px solid rgba(255,77,109,.45); border-radius: 11px; cursor: pointer;
  transition: border-color .15s, transform .05s;
}
.next-up:hover { border-color: var(--accent); }
.next-up:active { transform: scale(.995); }
.next-up .nu-label { font-size: 10px; letter-spacing: 1.5px; color: var(--accent); font-weight: 800; text-transform: uppercase; }
.next-up .nu-title { font-size: 13.5px; font-weight: 700; }
.next-up .nu-grade { font-size: 11px; color: var(--muted); }
.grade-group { margin-bottom: 16px; }
.grade-group-head { display: flex; align-items: center; gap: 10px; padding: 6px 4px; }
.grade-group-title { font-size: 11.5px; font-weight: 800; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; white-space: nowrap; }
.grade-group-head.current .grade-group-title { color: var(--accent); }
.grade-group-head.current .grade-group-title::after { content: " · your level"; font-weight: 600; color: var(--muted); letter-spacing: .5px; }
.grade-group-head.done .grade-group-title::after { content: " ✓"; color: var(--good); }
.grade-progress { flex: 1; max-width: 170px; height: 5px; background: var(--panel2); border-radius: 3px; overflow: hidden; }
.grade-progress .gp-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .4s; }
.grade-group-count { font-size: 10.5px; color: var(--muted); white-space: nowrap; }
.lesson-item.locked { opacity: .5; cursor: not-allowed; }
.lesson-item.locked:hover { border-color: var(--border); transform: none; }
.lesson-item.locked .thumb { filter: grayscale(1); }
.lesson-item.locked .thumb::after { content: "🔒"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 18px; background: rgba(5,7,12,.35); border-radius: 6px; pointer-events: none; }
.lesson-item.done .thumb::after { content: "✓"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 900; color: var(--good); text-shadow: 0 0 10px rgba(74,222,128,.8); background: rgba(5,7,12,.45); border-radius: 6px; pointer-events: none; }
.lesson-item .best-stars { font-size: 11px; color: var(--accent2); letter-spacing: 1px; white-space: nowrap; }

/* ---------- toast ---------- */
#toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 18px; border-radius: 8px; font-size: 13px; z-index: 60;
  box-shadow: 0 10px 30px rgba(0,0,0,.5);
}

/* ---- admin badge (header user chip; membership panel uses its own badge) ---- */
.admin-badge {
  margin-left: 6px;
  padding: 1px 7px 2px;
  border-radius: 9px;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.09em;
  line-height: 1.4;
  color: #140f05;
  background: linear-gradient(135deg, #ffd166 0%, #f4a92c 100%);
  border: 1px solid rgba(20, 15, 5, 0.4);
  vertical-align: middle;
  white-space: nowrap;
  user-select: none;
}