* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: Tahoma, "MS Sans Serif", Geneva, Verdana, sans-serif;
  font-size: 11px;
  background: #3a6ea5 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4'%3E%3Crect width='4' height='4' fill='%23327ac1'/%3E%3Crect width='2' height='2' fill='%233a86cc'/%3E%3Crect x='2' y='2' width='2' height='2' fill='%233a86cc'/%3E%3C/svg%3E");
  image-rendering: pixelated;
}

.desktop {
  position: relative;
  height: calc(100vh - 34px);
  overflow: auto;
}

/* ---------- window chrome ---------- */
.xp-window {
  position: absolute;
  width: 960px;
  max-width: calc(100vw - 16px);
  display: flex;
  flex-direction: column;
  background: #ece9d8;
  border: 1px solid #0831d9;
  border-radius: 8px 8px 3px 3px;
  box-shadow: 3px 3px 10px rgba(0,0,0,0.5);
  overflow: hidden;
}
.xp-window.minimized { display: none; }
.xp-window.maximized {
  top: 0 !important;
  left: 0 !important;
  width: 100% !important;
  height: 100% !important;
  max-width: 100%;
  border-radius: 0;
}

/* ---------- resize handles ---------- */
.resize-handle { position: absolute; z-index: 30; touch-action: none; }
.rh-n  { top: 0; left: 12px; right: 12px; height: 5px; cursor: n-resize; }
.rh-s  { bottom: 0; left: 12px; right: 12px; height: 5px; cursor: s-resize; }
.rh-e  { right: 0; top: 12px; bottom: 12px; width: 5px; cursor: e-resize; }
.rh-w  { left: 0; top: 12px; bottom: 12px; width: 5px; cursor: w-resize; }
.rh-nw { top: 0; left: 0; width: 12px; height: 12px; cursor: nw-resize; }
.rh-ne { top: 0; right: 0; width: 12px; height: 12px; cursor: ne-resize; }
.rh-sw { bottom: 0; left: 0; width: 12px; height: 12px; cursor: sw-resize; }
.rh-se { bottom: 0; right: 0; width: 12px; height: 12px; cursor: se-resize; }

/* ---------- snap preview overlay ---------- */
.snap-preview {
  position: absolute;
  display: none;
  background: rgba(120, 170, 255, 0.25);
  border: 2px solid rgba(80, 140, 240, 0.9);
  border-radius: 6px;
  pointer-events: none;
  z-index: 9000;
}

.titlebar {
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 3px 2px 6px;
  background: linear-gradient(180deg, #2f71e5 0%, #1958e0 4%, #0f45d4 8%, #1450d8 40%, #1c5bde 60%, #2361e0 88%, #1247c9 100%);
  border-bottom: 1px solid #0831d9;
  user-select: none;
  touch-action: none;
}
.xp-window:not(.focused) .titlebar {
  background: linear-gradient(180deg, #a2b4dc 0%, #8b9dcb 40%, #7e91c4 60%, #7285ba 100%);
  border-bottom: 1px solid #6a7ba8;
}

.titlebar-left {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #fff;
  font-weight: bold;
  font-size: 12px;
  text-shadow: 1px 1px 1px rgba(0,0,0,0.4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.titlebar-icon {
  background: #ffd23f;
  color: #7a4b00;
  border-radius: 2px;
  padding: 0 3px;
  font-size: 11px;
}

.titlebar-btns { display: flex; gap: 2px; }

.tb-btn {
  width: 21px;
  height: 20px;
  background: linear-gradient(180deg, #6fa8f5, #2a5fd8);
  border: 1px solid #1240b0;
  border-radius: 3px;
  color: #fff;
  font-weight: bold;
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
}
.tb-btn.tb-close { background: linear-gradient(180deg, #f5a08a, #d8412a); }
.xp-window:not(.focused) .tb-btn { filter: saturate(0.4) brightness(1.1); }

.menubar {
  position: relative;
  background: #ece9d8;
  border-bottom: 1px solid #b8b391;
  padding: 3px 6px;
  display: flex;
  gap: 14px;
  user-select: none;
}
.menu-item { color: #000; cursor: default; }
.menu-item:hover { background: #316ac5; color: #fff; padding: 0 2px; }

.menu-dropdown {
  position: absolute;
  top: 100%;
  left: 4px;
  min-width: 150px;
  background: #fff;
  border: 1px solid #7f9db9;
  box-shadow: 2px 2px 5px rgba(0,0,0,0.35);
  padding: 2px;
  z-index: 50;
}
.menu-option {
  padding: 4px 18px;
  cursor: default;
  white-space: nowrap;
}
.menu-option:hover { background: #316ac5; color: #fff; }

.hidden { display: none !important; }

.window-body {
  padding: 10px;
  background: #ece9d8;
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
}
.titlebar, .menubar, .statusbar { flex-shrink: 0; }

/* ---------- groupboxes ---------- */
.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.groupbox {
  border: 1px solid #8f8f8f;
  border-radius: 4px;
  background: #ece9d8;
  padding: 6px 8px 8px 8px;
}
.groupbox legend {
  padding: 0 4px;
  font-weight: bold;
  color: #003c74;
  font-size: 11px;
}

.radio-row { display: flex; flex-direction: column; gap: 3px; }
.radio-row label { display: flex; align-items: center; gap: 4px; white-space: nowrap; }

select {
  font-family: Tahoma, sans-serif;
  font-size: 11px;
  padding: 2px 3px;
  border: 1px solid #7f9db9;
  background: #fff;
  min-width: 130px;
}

/* ---------- sunken fretboard panel ---------- */
.sunken {
  border-top: 1px solid #808080;
  border-left: 1px solid #808080;
  border-right: 1px solid #fff;
  border-bottom: 1px solid #fff;
  box-shadow: inset 1px 1px 0 #404040, inset -1px -1px 0 #dfdfdf;
  background: #fdfdf5;
}

.fretboard-panel {
  padding: 10px 10px 0 10px; /* no bottom padding: scrollbar sits flush with the sunken edge */
  margin-bottom: 10px;
  overflow: hidden;
}

.fretboardScroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 10px; /* keep fret numbers clear of the horizontal scrollbar */
}

.fretboardSvg {
  display: block;
  shape-rendering: crispEdges;
}

/* ---------- triad panel ---------- */
.triad-groupbox { display: block; }

.triad-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.triad-enable { display: flex; align-items: center; gap: 4px; font-weight: bold; }
.string-set-label { color: #444; }
.triad-controls label { display: flex; align-items: center; gap: 3px; white-space: nowrap; }

.triad-legend {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  border-top: 1px dotted #b8b391;
  padding-top: 6px;
}
.legend-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  font-weight: bold;
  font-size: 10px;
  color: #fff;
  border: 1px solid rgba(0,0,0,0.4);
}
.role-R { background: #cc3333; }
.role-3 { background: #2e8b57; }
.role-5 { background: #3366cc; }
.legend-sep { color: #999; }
.triadReadout { font-style: italic; color: #333; }

/* ---------- statusbar ---------- */
.statusbar {
  display: flex;
  border-top: 1px solid #fff;
  background: #ece9d8;
}
.status-cell {
  flex: 1;
  padding: 3px 8px;
  border-top: 1px solid #808080;
  border-right: 1px solid #808080;
  margin: 2px 0 2px 2px;
  box-shadow: inset -1px -1px 0 #fff;
}
.status-cell:last-child { margin-right: 2px; }

/* ---------- taskbar ---------- */
.taskbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 34px;
  background: linear-gradient(180deg, #2f71e5 0%, #1958e0 10%, #174cc7 50%, #143fae 100%);
  border-top: 1px solid #4a90ff;
  display: flex;
  align-items: center;
  padding: 0 4px;
  gap: 8px;
  z-index: 100;
}
.start-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: linear-gradient(180deg, #3fae3f, #1f7a1f);
  color: #fff;
  font-weight: bold;
  font-style: italic;
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid #145214;
  height: 26px;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
}
.start-flag { color: #ffd23f; font-style: normal; }

.taskbar-apps {
  display: flex;
  gap: 4px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
}
.taskbar-app {
  background: #1f4fc7;
  border: 1px solid #0d2f8a;
  border-radius: 3px;
  color: #fff;
  padding: 3px 10px;
  height: 24px;
  display: flex;
  align-items: center;
  box-shadow: inset 1px 1px 0 rgba(255,255,255,0.2);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
  flex-shrink: 0;
}
.taskbar-app.active {
  background: #0d2f8a;
  box-shadow: inset 1px 1px 3px rgba(0,0,0,0.55);
}

.taskbar-clock {
  margin-left: auto;
  background: #1f4fc7;
  color: #fff;
  padding: 3px 10px;
  border-left: 1px solid #0d2f8a;
  height: 26px;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

/* ---------- start menu ---------- */
.start-menu {
  position: fixed;
  bottom: 36px;
  left: 2px;
  min-width: 190px;
  background: #fff;
  border: 1px solid #0831d9;
  border-radius: 4px 4px 0 0;
  box-shadow: 3px -2px 8px rgba(0,0,0,0.35);
  padding: 3px;
  z-index: 200;
}
.start-menu-item {
  padding: 7px 14px;
  cursor: default;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: bold;
}
.start-menu-item:hover { background: #316ac5; color: #fff; }
.start-menu-icon {
  background: #ffd23f;
  color: #7a4b00;
  border-radius: 2px;
  padding: 0 3px;
}

/* ---------- svg note styling ---------- */
.fret-line { stroke: #999; stroke-width: 1; }
.nut-line { stroke: #222; stroke-width: 6; }
.string-line { stroke: #7a6a4a; }
.fret-marker { fill: #d8d2b8; }
.string-label { fill: #333; font-size: 11px; font-family: Tahoma, sans-serif; }
.fret-number { fill: #444; font-size: 13px; font-weight: bold; font-family: Tahoma, sans-serif; }

.note-dot { cursor: default; }
.note-dot.scale { fill: #a9c6f5; stroke: #3a6ea5; stroke-width: 1; }
.note-dot.scale.root { fill: #ffd23f; stroke: #a3720b; }
.note-label { font-family: Tahoma, sans-serif; font-weight: bold; text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.note-label.scale-label { fill: #1b3a63; font-size: 10px; }
.note-label.scale-label.root-label { fill: #5a3d00; }
.note-label.triad-label { fill: #fff; font-size: 10px; }

.triad-shape-box {
  fill: rgba(80, 60, 20, 0.06);
  stroke: #8a7a4a;
  stroke-width: 1;
  stroke-dasharray: 3 2;
}
.triad-inv-tag {
  font-family: Tahoma, sans-serif;
  font-size: 9px;
  font-weight: bold;
  fill: #5a4a1a;
}