:root {
  --bg: #080706;
  --bg-soft: #0e0c0b;
  --panel: #151210;
  --panel-2: #1c1714;
  --panel-3: #241b16;
  --text: #f7efe3;
  --muted: #b8ab9c;
  --muted-2: #8f8174;
  --line: rgba(239, 223, 194, .11);
  --line-strong: rgba(239, 223, 194, .18);
  --accent: #f47a1f;
  --accent-2: #ff9b3d;
  --accent-deep: #a64311;
  --cream: #efe0b6;
  --wood: #8d5426;
  --wood-deep: #4f2d17;
  --green: #8cbf77;
  --danger: #e57962;
  --radius-xl: 28px;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 16px 44px rgba(0, 0, 0, .38);
  --glow: 0 18px 48px rgba(244, 122, 31, .13);
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(circle at 50% -8%, rgba(244,122,31,.17), transparent 28rem),
    radial-gradient(circle at 88% 36%, rgba(154,73,25,.08), transparent 20rem),
    linear-gradient(180deg, #0b0908 0%, #070606 52%, #050505 100%);
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image:
    repeating-linear-gradient(0deg, rgba(255,255,255,.012) 0, rgba(255,255,255,.012) 1px, transparent 1px, transparent 4px),
    radial-gradient(circle at 20% 10%, rgba(255,255,255,.03), transparent 22rem);
  mix-blend-mode: soft-light;
}
button, input, select, textarea { font: inherit; }
button { color: inherit; -webkit-tap-highlight-color: transparent; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.app-shell {
  width: min(780px, 100%);
  margin: 0 auto;
  padding: max(22px, env(safe-area-inset-top)) 18px max(104px, env(safe-area-inset-bottom));
  position: relative;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin: 10px 2px 24px;
}
h1,h2,h3,p { margin-top: 0; }
h1 {
  font-size: clamp(32px, 7vw, 48px);
  margin-bottom: 0;
  letter-spacing: -.055em;
  line-height: .94;
  font-weight: 780;
}
h2 {
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1;
  letter-spacing: -.045em;
  margin-bottom: 9px;
  font-weight: 760;
}
h3 { font-size: 20px; margin-bottom: 7px; letter-spacing: -.018em; }
.eyebrow {
  color: var(--accent-2);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .17em;
  margin-bottom: 9px;
  text-transform: uppercase;
}
.muted { color: var(--muted); line-height: 1.52; }

.icon-btn,.small-btn,.ghost-btn,.primary-btn,.tab {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.012));
  border-radius: 999px;
  min-height: 44px;
  cursor: pointer;
  transition: transform .16s ease, border-color .16s ease, background .16s ease, color .16s ease;
}
@media (hover:hover) and (pointer:fine) {
  .icon-btn:hover,.small-btn:hover,.ghost-btn:hover,.primary-btn:hover,.filter-btn:hover,.song-action:hover,.skill-card:hover {
    transform: translateY(-1px);
  }
}
.icon-btn {
  width: 48px;
  font-size: 20px;
  background: rgba(255,255,255,.025);
  border-color: var(--line-strong);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.035);
}

.tabs {
  position: sticky;
  top: max(8px, env(safe-area-inset-top));
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  padding: 6px;
  background: rgba(12,10,9,.84);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border: 1px solid var(--line);
  border-radius: 20px;
  margin-bottom: 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,.22);
}
.tab {
  min-width: 0;
  background: transparent;
  border: 0;
  padding: 0 8px;
  color: var(--muted);
  font-weight: 800;
}
.tab.active {
  color: #1b0c04;
  background: linear-gradient(180deg, #ff9b3d 0%, #f47a1f 100%);
  box-shadow: 0 8px 22px rgba(244,122,31,.22), inset 0 1px 0 rgba(255,255,255,.25);
}
.panel { display: none; }
.panel.active { display: block; }

.hero-card,.trainer-card,.editor-card,.backup-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,.018), transparent 34%),
    linear-gradient(180deg, rgba(25,20,17,.97), rgba(15,13,12,.98));
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}
.hero-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 168px;
  padding: 22px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 12%, rgba(255,157,65,.20), transparent 14rem),
    radial-gradient(circle at 28% 120%, rgba(164,67,17,.18), transparent 18rem),
    linear-gradient(145deg, #1a1512 0%, #120f0d 62%, #0d0c0b 100%);
  border-color: rgba(238,191,128,.16);
  box-shadow: var(--glow), var(--shadow);
}
.hero-card::after {
  content: "";
  position: absolute;
  left: -8%;
  right: 22%;
  bottom: -72px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(244,122,31,.16), transparent 66%);
  pointer-events: none;
}
.hero-copy { min-width: 0; position: relative; z-index: 1; }
.ring {
  --p: 0;
  width: 88px;
  height: 88px;
  flex: 0 0 auto;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--accent-2) calc(var(--p)*1%), rgba(239,224,182,.10) 0);
  position: relative;
  box-shadow: 0 8px 28px rgba(244,122,31,.15);
}
.ring::after {
  content:"";
  position:absolute;
  inset:8px;
  background: linear-gradient(180deg,#17120f,#0e0c0b);
  border-radius:50%;
  border: 1px solid rgba(239,224,182,.08);
}
.ring span { position:relative; z-index:1; font-weight:900; font-size:14px; color:var(--cream); }

.stack { display: grid; gap: 12px; margin-top: 14px; }
.practice-card,.song-card,.my-song-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,.018), transparent 42%),
    linear-gradient(180deg, #171411, #11100f);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 17px;
  box-shadow: 0 8px 28px rgba(0,0,0,.18);
}
.practice-top,.song-top,.my-song-top { display:flex; gap:12px; align-items:flex-start; justify-content:space-between; }
.practice-check {
  appearance:none;
  width:28px;
  height:28px;
  border-radius:9px;
  border:1px solid rgba(239,224,182,.22);
  background:#0b0a09;
  flex:0 0 auto;
  margin:0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.025);
}
.practice-check:checked {
  background: linear-gradient(180deg,var(--accent-2),var(--accent));
  border-color:var(--accent);
  position:relative;
  box-shadow: 0 5px 16px rgba(244,122,31,.22);
}
.practice-check:checked::after { content:"✓"; color:#1d0c03; font-weight:1000; display:grid; place-items:center; height:100%; }
.practice-main { display:flex; gap:13px; min-width:0; }
.practice-card h3,.song-card h3,.my-song-card h3 { margin-bottom:5px; }
.meta-row { display:flex; flex-wrap:wrap; gap:7px; margin-top:11px; }
.pill {
  padding:7px 10px;
  border-radius:999px;
  background: rgba(239,224,182,.055);
  color:var(--cream);
  font-size:12px;
  border:1px solid rgba(239,224,182,.10);
}

.section-head { display:flex; justify-content:space-between; gap:16px; align-items:end; margin-top:30px; }
.section-head.spaced { margin-top:38px; }
.discovery-card {
  border-radius:22px;
  padding:21px;
  background:
    radial-gradient(circle at 100% 0%, rgba(244,122,31,.12), transparent 15rem),
    linear-gradient(140deg,#201812,#14110f 60%, #100f0e);
  border:1px solid rgba(239,196,140,.14);
  box-shadow: 0 10px 32px rgba(0,0,0,.2);
}
.discovery-card strong { color: var(--accent-2); }
.discovery-card p:last-child { margin-bottom:0; }

.skill-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:12px; }
.skill-card {
  background: linear-gradient(160deg,#181411,#100f0e);
  border:1px solid var(--line);
  border-radius:20px;
  padding:17px;
  cursor:pointer;
  text-align:left;
  box-shadow: 0 8px 24px rgba(0,0,0,.16);
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}
.skill-card:hover { border-color: rgba(244,122,31,.22); }
.skill-card .bar {
  height:7px;
  background:rgba(239,224,182,.08);
  border-radius:999px;
  overflow:hidden;
  margin-top:15px;
}
.skill-card .bar > i {
  display:block;
  height:100%;
  background: linear-gradient(90deg,var(--accent-deep),var(--accent),var(--accent-2));
  border-radius:999px;
}

.trainer-card { padding:18px; overflow:hidden; }
.trainer-controls { display:grid; grid-template-columns:1fr 1fr; gap:10px; }
label { color:var(--muted); font-size:12px; font-weight:800; }
select,input,textarea {
  width:100%;
  margin-top:6px;
  color:var(--text);
  background: rgba(7,6,6,.78);
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  min-height:46px;
  outline:none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.02);
}
textarea { resize:vertical; }
select:focus,input:focus,textarea:focus { border-color:rgba(244,122,31,.65); }

.fretboard {
  overflow-x:auto;
  margin:20px -5px 13px;
  padding:10px 5px 12px;
  scrollbar-color: rgba(239,224,182,.2) transparent;
}
.fret-grid {
  display:grid;
  grid-template-columns:46px repeat(12, 42px);
  gap:3px;
  min-width:max-content;
  padding: 10px 9px;
  border-radius: 14px;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.018) 0 1px, transparent 1px 42px),
    linear-gradient(180deg,#7a4723 0%, #4d2c18 48%, #3a2114 100%);
  border:1px solid rgba(222,178,126,.18);
  box-shadow: inset 0 8px 18px rgba(255,255,255,.025), inset 0 -10px 22px rgba(0,0,0,.22);
}
.fret-cell {
  height:34px;
  border-radius:8px;
  display:grid;
  place-items:center;
  font-size:11px;
  background:rgba(17,10,7,.44);
  color:rgba(246,235,218,.42);
  border:1px solid rgba(233,207,176,.10);
  backdrop-filter: blur(2px);
}
.fret-cell.note {
  background:rgba(239,224,182,.13);
  color:var(--cream);
  border-color:rgba(239,224,182,.22);
  font-weight:900;
}
.fret-cell.root {
  background: linear-gradient(180deg,var(--accent-2),var(--accent));
  color:#1a0902;
  border-color:var(--accent);
  box-shadow: 0 0 0 2px rgba(244,122,31,.12), 0 4px 14px rgba(244,122,31,.22);
}
.string-label { color:rgba(247,239,227,.58); background:transparent; border-color:transparent; justify-items:start; }
.trainer-copy { color:var(--muted); line-height:1.52; }

.filters { display:flex; gap:8px; overflow-x:auto; padding:4px 0 10px; scrollbar-width:none; }
.filters::-webkit-scrollbar { display:none; }
.filter-btn {
  white-space:nowrap;
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  color:var(--muted);
  border-radius:999px;
  padding:10px 14px;
  min-height:42px;
  transition: transform .16s ease, border-color .16s ease, background .16s ease, color .16s ease;
}
.filter-btn.active {
  color:#1a0b03;
  background:linear-gradient(180deg,var(--accent-2),var(--accent));
  border-color:var(--accent);
  font-weight:900;
  box-shadow: 0 6px 18px rgba(244,122,31,.18);
}
.song-action {
  border:0;
  background:transparent;
  color:var(--accent-2);
  font-weight:900;
  cursor:pointer;
  padding:4px;
}
.small-btn,.ghost-btn,.primary-btn { padding:0 15px; font-weight:900; }
.primary-btn {
  background:linear-gradient(180deg,var(--accent-2),var(--accent));
  color:#1a0a03;
  border-color:var(--accent);
  box-shadow:0 7px 20px rgba(244,122,31,.18);
}
.ghost-btn { background:transparent; }
.editor-card { display:grid; gap:10px; margin-top:14px; padding:17px; }
.hidden { display:none !important; }
.form-actions,.backup-actions { display:flex; justify-content:flex-end; gap:8px; }
.my-song-body {
  white-space:pre-wrap;
  color:#d6cabd;
  line-height:1.58;
  margin-top:11px;
  padding-top:11px;
  border-top:1px solid var(--line);
}
.my-song-actions { display:flex; gap:6px; }
.text-btn { background:transparent; border:0; color:var(--muted); cursor:pointer; padding:4px; }
.text-btn.danger { color:var(--danger); }
.backup-card { margin-top:30px; display:flex; justify-content:space-between; gap:14px; align-items:center; padding:18px; }
.backup-card p { margin-bottom:0; }
.file-btn { display:grid; place-items:center; }
.file-btn input { display:none; }
.empty {
  text-align:center;
  color:var(--muted);
  padding:32px 14px;
  border:1px dashed rgba(239,224,182,.14);
  border-radius:20px;
  background:rgba(239,224,182,.025);
}

@media (max-width: 480px) {
  .app-shell { padding-left:14px; padding-right:14px; }
  .topbar { margin-bottom:20px; }
  .tabs { gap:3px; }
  .tab { font-size:12px; }
  .hero-card { padding:19px; min-height:154px; }
  .ring { width:78px; height:78px; }
  .skill-grid { grid-template-columns:1fr; }
  .backup-card { align-items:flex-start; flex-direction:column; }
  .backup-actions { width:100%; justify-content:flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { scroll-behavior:auto !important; transition:none !important; }
}

/* --- Fretwork v2 lesson engine --- */
.intro-copy { margin: -2px 0 18px; max-width: 620px; }
.clickable-card { cursor: pointer; transition: transform .16s ease, border-color .16s ease, background .16s ease; }
@media (hover:hover) and (pointer:fine) { .clickable-card:hover { transform: translateY(-2px); border-color: rgba(244,122,31,.28); } }
.inline-start { margin-top: 10px; padding: 0; border: 0; background: transparent; color: var(--accent-2); font-weight: 900; cursor: pointer; }
.next-line { margin: 12px 0 0; color: var(--cream); font-size: 13px; font-weight: 800; }
.open-path { display:inline-block; margin-top:10px; color:var(--accent-2); font-size:12px; font-weight:900; letter-spacing:.02em; }

.modal-open { overflow: hidden; }
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100; display: none; align-items: flex-end; justify-content: center;
  background: rgba(0,0,0,.72); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 18px 12px max(18px, env(safe-area-inset-bottom));
}
.modal-backdrop.open { display: flex; }
.lesson-modal {
  width: min(760px,100%); max-height: calc(100vh - 34px); overflow-y: auto; overscroll-behavior: contain;
  background: radial-gradient(circle at 84% 0%, rgba(244,122,31,.15), transparent 20rem), linear-gradient(180deg,#171310,#0c0b0a 72%);
  border: 1px solid rgba(239,196,140,.17); border-radius: 28px 28px 18px 18px; padding: 24px 18px 28px;
  box-shadow: 0 30px 80px rgba(0,0,0,.65); position: relative;
}
.modal-close { position: sticky; top: 0; float: right; z-index: 4; width: 44px; height: 44px; border-radius: 999px; border: 1px solid var(--line-strong); background: rgba(10,8,7,.92); color: var(--cream); font-size: 28px; line-height: 1; cursor: pointer; }
.modal-lead { color: var(--text-soft); line-height: 1.6; font-size: 16px; max-width: 620px; margin-bottom: 22px; }
.lesson-section { margin: 18px 0; padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.018); }
.lesson-section h3 { margin-bottom: 10px; }
.lesson-section p { color: var(--text-soft); line-height: 1.6; margin-bottom: 0; }
.practice-steps { margin: 0; padding-left: 22px; color: var(--text-soft); line-height: 1.6; }
.practice-steps li + li { margin-top: 8px; }
.section-line { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.tab-label { font-size: 10px; font-weight: 900; letter-spacing: .12em; color: var(--accent-2); border: 1px solid rgba(244,122,31,.22); border-radius: 999px; padding: 6px 8px; }
.tab-sheet {
  overflow-x: auto; margin: 12px 0 0; padding: 16px; border-radius: 14px; background: #080706; color: #f4e7d3;
  border: 1px solid rgba(239,224,182,.1); font-family: "SFMono-Regular",Consolas,"Liberation Mono",monospace; font-size: 12px; line-height: 1.48;
  white-space: pre; -webkit-overflow-scrolling: touch;
}
.challenge-box { margin: 18px 0; padding: 17px; border-radius: 18px; background: linear-gradient(145deg,rgba(244,122,31,.12),rgba(239,224,182,.03)); border: 1px solid rgba(244,122,31,.18); }
.challenge-box p:last-child { margin-bottom: 0; color: var(--text-soft); line-height: 1.55; }
.modal-complete { width: 100%; margin-top: 4px; }
.lesson-list { display: grid; gap: 9px; margin-top: 18px; }
.lesson-row { width: 100%; display: grid; grid-template-columns: 36px minmax(0,1fr) 34px; gap: 10px; align-items: center; text-align: left; border: 1px solid var(--line); background: rgba(255,255,255,.018); color: var(--text); border-radius: 16px; padding: 13px; cursor: pointer; }
.lesson-num { color: var(--muted); font-size: 12px; font-weight: 900; }
.lesson-row-main { min-width: 0; display: grid; gap: 4px; }
.lesson-row-main small { color: var(--muted); line-height: 1.35; }
.lesson-status { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; color: var(--accent-2); border: 1px solid var(--line); }
.lesson-status.done { background: var(--accent); color: #1a0902; border-color: var(--accent); }
.study-section { padding-bottom: 16px; }
.section-check { display: inline-flex; align-items: center; gap: 7px; color: var(--cream); cursor: pointer; }
.section-check input { width: 20px; height: 20px; min-height: 0; margin: 0; accent-color: var(--accent); }
.song-facts { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 18px; }
.song-facts span { padding: 7px 10px; border-radius: 999px; font-size: 12px; color: var(--cream); border: 1px solid var(--line); background: rgba(239,224,182,.04); }
.primary-link { min-height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 999px; padding: 0 18px; text-decoration: none; font-weight: 900; color: #1a0a03; background: linear-gradient(180deg,var(--accent-2),var(--accent)); box-shadow: 0 8px 22px rgba(244,122,31,.18); }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important; }

@media (min-width: 700px) {
  .modal-backdrop { align-items: center; }
  .lesson-modal { border-radius: 28px; padding: 28px; }
}