/* First-version deep-space presentation. Layout follows the approved original-v2/b design.
   Theme colors are scoped to orbit; every existing palette remains selectable and effective. */
html { box-sizing: border-box; }
*, *::before, *::after { box-sizing: inherit; }
[data-theme="orbit"] {
  --bg: #0b121e; --bg2: #0b121e; --panel: #121f30; --panel2: #17273b;
  --line: #2a3b50; --text: #e1edf6; --muted: #91a7ba;
  --indigo: #93d9ee; --teal: #93d9ee; --orange: #f5b781;
  --on-primary: #0c2636; --on-accent: #241506;
  --pri-soft: #19384a; --sec-soft: #19384a;
  --dot-normal: #93d9ee; --on-dot-normal: #0c2636;
  --kb-white: #e1edf6; --kb-black: #121f30; --kb-edge: #51667c;
  --kb-on-w: #93d9ee; --kb-on-b: #288ba7;
  --kb-lh-w: #f5b781; --kb-lh-b: #bd7440; --kb-fg-lh: #975423;
  --kb-label: #53657a; --on-fg-lh: #ffffff;
  --gt-string: #91a7ba; --gt-fret: #40546c; --gt-nut: #e1edf6; --thumb-border: #e1edf6;
  color-scheme: dark;
}
[data-practice-ui] body {
  max-width: 1560px; width: 100%; height: auto; margin: 0 auto;
  padding: 0 28px 0 212px; background: var(--bg); color: var(--text);
}
[data-practice-ui] header { position: relative; padding: 28px 12px; gap: 16px; flex-wrap: wrap; }
[data-practice-ui] header h1 { font-size: 23px; letter-spacing: -.5px; font-weight: 600; }
[data-practice-ui] header h1 span { color: var(--text); }
[data-practice-ui] header::before { content: 'GAN / PRACTICE'; position: fixed; left: 24px; top: 34px; z-index: 11; font-size: 11px; letter-spacing: 2px; color: var(--indigo); }
[data-practice-ui] header::after { content: '甘老师制作'; position: fixed; left: 24px; top: 63px; z-index: 11; font-size: 13px; color: var(--muted); }
[data-practice-ui] .themebtn { border-radius: 10px; padding: 10px 13px; min-height: 44px; }
[data-practice-ui] .tabs {
  position: fixed; top: 0; left: 0; width: 184px; height: 100vh; height: 100dvh;
  display: flex; flex-direction: column; flex-wrap: nowrap; gap: 7px;
  padding: 120px 15px 20px; margin: 0; border-right: 1px solid var(--line);
  justify-content: flex-start; background: var(--bg2); z-index: 10; overflow-y: auto;
}
[data-practice-ui] .tab { border: 0; background: transparent; color: var(--muted); min-height: 44px; border-radius: 12px; padding: 12px 17px; font-size: 13px; text-align: left; width: 100%; flex-shrink: 0; }
[data-practice-ui] .tab.on { background: var(--pri-soft); color: var(--indigo); font-weight: 600; }
[data-practice-ui] .pane { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr); gap: 22px; align-items: start; padding: 0 0 24px; min-width: 0; }
[data-practice-ui] .pane[hidden] { display: none; }
[data-practice-ui] .pane > main { position: sticky; top: 22px; min-width: 0; min-height: 510px; padding: 36px 32px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); box-shadow: 0 20px 80px #0001; }
[data-practice-ui] .pane > main::before { content: attr(data-practice-title); font-size: 11px; letter-spacing: 3px; color: var(--muted); margin-bottom: 36px; align-self: flex-start; }
[data-practice-ui] #note { font-size: clamp(110px, 13vw, 200px); line-height: 1.3; font-weight: 400; letter-spacing: -3px; }
[data-practice-ui] #cSymbol, [data-practice-ui] #iSymbol, [data-practice-ui] #pChord, [data-practice-ui] #scName { font-weight: 400; letter-spacing: -2px; }
[data-practice-ui] main .hint { font-size: 13px; margin-top: 20px; }
[data-practice-ui] .controls { width: 100%; max-width: none; padding: 0; margin: 0; min-width: 0; }
[data-practice-ui] .card { padding: 24px; border-radius: 20px; gap: 19px; min-width: 0; }
[data-practice-ui] .label { font-size: 12px; }
[data-practice-ui] .seg { background: var(--panel2); border: 1px solid var(--line); border-radius: 10px; padding: 3px; max-width: 100%; flex-wrap: wrap; }
[data-practice-ui] .seg button { min-height: 38px; border-radius: 7px; font-size: 12px; }
[data-practice-ui] .chip, [data-practice-ui] .nchip { min-height: 38px; }
[data-practice-ui] .qbtn, [data-practice-ui] select, [data-practice-ui] input[type=number] { min-height: 40px; font-size: 12px; max-width: 100%; }
[data-practice-ui] #toggle, [data-practice-ui] .bigbtn { min-height: 52px; border-radius: 13px; font-size: 16px; font-weight: 500; }
[data-practice-ui] .practice-details { width: 100%; border-top: 1px solid var(--line); min-width: 0; }
[data-practice-ui] .practice-details summary { cursor: pointer; font-size: 13px; padding: 17px 0; color: var(--muted); min-height: 48px; }
[data-practice-ui] .practice-details summary::marker { color: var(--indigo); }
[data-practice-ui] .practice-details-body { display: flex; flex-direction: column; gap: 18px; padding: 0 0 18px; min-width: 0; }
[data-practice-ui] .practice-details-body > [hidden] { display: none; }
[data-practice-ui] .grid, [data-practice-ui] .row, [data-practice-ui] .lsn-opts { min-width: 0; max-width: 100%; }
[data-practice-ui] .diagram, [data-practice-ui] .diagram svg, [data-practice-ui] .progress, [data-practice-ui] .tuner, [data-practice-ui] .logwrap { max-width: 100%; }
/* Viewport-sized native diagram boxes must also respect the narrower stage column. */
[data-practice-ui] .dbox { max-width: 100%; min-width: 0; }
[data-practice-ui] .dtool { flex-wrap: wrap; height: auto; min-height: 32px; }
[data-practice-ui] .sitefoot { margin: 8px 0; padding: 24px 12px; color: var(--muted); }
[data-practice-ui] :focus-visible { outline: 2px solid var(--indigo); outline-offset: 4px; }
@media (max-width: 1100px) {
  [data-practice-ui] .pane { grid-template-columns: minmax(0, 1fr); }
  [data-practice-ui] .pane > main { position: relative; top: 0; min-height: 330px; }
}
@media (max-width: 650px) {
  [data-practice-ui] body { padding: 0 max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left)); }
  [data-practice-ui] header { padding: calc(20px + env(safe-area-inset-top)) 3px 20px; }
  [data-practice-ui] header h1 { font-size: 20px; }
  [data-practice-ui] header::before, [data-practice-ui] header::after { display: none; }
  [data-practice-ui] .hright { gap: 6px; width: 100%; max-width: 100%; flex-wrap: wrap; }
  [data-practice-ui] .themebtn { padding: 8px 10px; }
  [data-practice-ui] .tabs { position: relative; inset: auto; width: 100%; height: auto; flex-direction: row; flex-wrap: wrap; gap: 3px; padding: 0 0 18px; border: 0; background: transparent; overflow-y: visible; }
  [data-practice-ui] .tab { width: auto; padding: 9px 11px; font-size: 12px; }
  [data-practice-ui] .pane { grid-template-columns: minmax(0, 1fr); }
  [data-practice-ui] .pane > main { padding: 24px 18px; border-radius: 18px; min-height: 290px; }
  [data-practice-ui] .pane > main::before { margin-bottom: 22px; font-size: 10px; }
  [data-practice-ui] .card { padding: 18px; border-radius: 18px; }
  [data-practice-ui] .row { flex-wrap: wrap; }
  [data-practice-ui] .label { min-width: 100%; }
  [data-practice-ui] .grow { grid-template-columns: repeat(7, minmax(0, 1fr)); }
  [data-practice-ui] .grow .chip { grid-column: 1 / -1; }
  [data-practice-ui] .grid .chip { white-space: normal; }
  [data-practice-ui] .nchip { padding: 8px 0; }
  [data-practice-ui] .popover, [data-practice-ui] #themePop { min-width: 0; width: min(350px, calc(100vw - 28px)); max-width: calc(100vw - 28px); }
  [data-practice-ui] .topt { flex-wrap: wrap; white-space: normal; }
  [data-practice-ui] #scNotes, [data-practice-ui] #fbFeedback { white-space: normal; overflow-wrap: anywhere; max-width: 100%; min-width: 0; }
  [data-practice-ui] #scNotes { flex-wrap: wrap; height: auto; min-height: 72px; }
  [data-practice-ui] #fbFeedback { height: auto; min-height: 1.5em; overflow: visible; }
  [data-practice-ui] .sitefoot { font-size: 10px; }
}
/* A focus stage: native controls are reparented only at phone widths. */
.practice-mobile { display: none; }
@media (max-width: 650px) {
  [data-mobile-a] body { padding-bottom: calc(110px + env(safe-area-inset-bottom)); }
  [data-mobile-a] header { padding-bottom: 14px; gap: 8px; }
  [data-mobile-a] .hright { width: auto; margin-left: auto; gap: 6px; }
  [data-mobile-a] .practice-mobile { display: flex; }
  [data-mobile-a] .practice-module-open { width: 100%; min-height: 54px; margin: 0 0 14px; padding: 12px 16px; border-radius: 14px; border: 1px solid var(--line); background: var(--panel); color: var(--indigo); align-items: center; justify-content: space-between; text-align: left; font-size: 14px; }
  [data-mobile-a] .pane > main { min-height: 430px; padding: 22px; border-radius: 22px; }
  [data-mobile-a] .pane[data-pane="notes"] > main { min-height: 470px; }
  [data-mobile-a] .pane > main::before { align-self: flex-start; margin-bottom: auto; font-size: 12px; letter-spacing: 1px; }
  [data-mobile-a] #note { font-size: clamp(120px, 41vw, 160px); line-height: 1.1; height: auto; margin: 42px 0 12px; }
  [data-mobile-a] #hint { font-size: 14px; margin-top: 14px; }
  [data-mobile-a] #count { margin-top: 10px; }
  [data-mobile-a] #progress { margin-top: auto; }
  [data-mobile-a] .practice-dock { position: fixed; z-index: 20; inset: auto 0 0; gap: 12px; align-items: center; background: var(--bg2); border-top: 1px solid var(--line); padding: 16px max(20px, env(safe-area-inset-right)) calc(20px + env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left)); }
  [data-mobile-a] .practice-dock > #toggle, [data-mobile-a] .practice-dock > .bigbtn { flex: 1; width: auto; min-width: 0; min-height: 54px; margin: 0; }
  [data-mobile-a] .practice-dock small { display: none; }
  [data-mobile-a] .practice-settings-open { min-height: 54px; min-width: 84px; font-size: 14px; }
  [data-mobile-a] .practice-drawer { color: var(--text); background: var(--panel); border: 1px solid var(--line); border-bottom: 0; border-radius: 24px 24px 0 0; padding: 0; margin: auto auto 0; width: 100%; max-width: 650px; max-height: 85vh; max-height: 85dvh; overflow-y: auto; overscroll-behavior: contain; padding-bottom: calc(20px + env(safe-area-inset-bottom)); padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
  [data-mobile-a] .practice-drawer::backdrop { background: #030914b8; backdrop-filter: blur(6px); }
  [data-mobile-a] .practice-drawer-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 16px 20px; position: sticky; top: 0; z-index: 2; background: var(--panel); border-bottom: 1px solid var(--line); }
  [data-mobile-a] .practice-drawer-head h2 { font-size: 18px; margin: 0; }
  [data-mobile-a] .practice-drawer .tabs { position: static; inset: auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); height: auto; width: 100%; padding: 16px 20px; gap: 8px; border: 0; background: transparent; }
  [data-mobile-a] .practice-drawer .tab { width: 100%; min-height: 52px; border: 1px solid var(--line); border-radius: 12px; padding: 12px; font-size: 15px; }
  [data-mobile-a] .practice-drawer .controls { display: flex; flex-direction: column; gap: 16px; padding: 16px 20px 0; }
  [data-mobile-a] .practice-drawer .card { padding: 0; border: 0; box-shadow: none; border-radius: 0; background: transparent; }
  [data-mobile-a] button, [data-mobile-a] summary, [data-mobile-a] input:not([type=checkbox]):not([type=radio]), [data-mobile-a] select, [data-mobile-a] .chip { min-height: 44px; }
  [data-mobile-a] button { min-width: 44px; touch-action: manipulation; }
  [data-mobile-a] .nchip { min-height: 44px; }
  [data-mobile-a] .seg button { min-height: 44px; font-size: 14px; }
  [data-mobile-a] .qbtn { min-height: 44px; font-size: 14px; }
  [data-mobile-a] .themebtn { min-height: 44px; }
  [data-mobile-a] input[type=number], [data-mobile-a] select, [data-mobile-a] .chip { min-height: 44px; }
  [data-mobile-a] .practice-details summary { font-size: 15px; }
  [data-mobile-a] .practice-details-body { padding-bottom: 12px; }
  [data-mobile-a] .label { font-size: 14px; }
  [data-mobile-a] .grow, [data-mobile-a] #cTypeGrid .grow { grid-template-columns: repeat(4, minmax(44px, 1fr)); }
  [data-mobile-a] .grow > .chip { grid-column: 1 / -1; }
  [data-mobile-a] .practice-drawer input, [data-mobile-a] .practice-drawer select { max-width: 100%; }
  [data-mobile-a] .practice-drawer input[type=text], [data-mobile-a] .practice-drawer input[type=date], [data-mobile-a] .practice-drawer select { min-width: 0; }
  [data-mobile-a] .sitefoot { padding: 20px 4px; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  [data-practice-ui] .tab, [data-practice-ui] .nchip { transition: none; }
}