:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-2: #eef3fb;
  --text: #151922;
  --muted: #667089;
  --line: #d7deea;
  --accent: #2563eb;
  --accent-soft: rgba(37,99,235,.10);
  --shadow: 0 20px 50px rgba(17,24,39,.08);
  --ok: #10b981;
  --warn: #f59e0b;
  --bad: #ef4444;
}
* { box-sizing: border-box; }
body { margin-top: 70px; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans KR",sans-serif; }
button,select { font: inherit; cursor: pointer; }
h2,h3,p { margin-top: 0; }

.mus-app { max-width: 100%; padding: 24px 0 60px; }

/* Header */
.mus-header {
  background: var(--panel); border: 1px solid var(--line); border-radius: 22px;
  box-shadow: var(--shadow); padding: 28px;
  display: flex; justify-content: space-between; align-items: flex-start; gap: 20px;
}
.mus-title { margin: 0 0 8px; font-size: 34px; line-height: 1.15; }
.mus-sub { margin: 0; color: var(--muted); }
.mus-header-acts { display: flex; gap: 10px; flex-shrink: 0; justify-content: flex-end; padding: 8px 0 4px; }

/* Buttons */
.mus-btn {
  appearance: none; border-radius: 14px; padding: 12px 18px;
  font-weight: 700; font-size: 14px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); white-space: nowrap;
}
.mus-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.mus-ghost   { background: var(--panel-2); color: var(--text); }
.mus-btn:hover { opacity: .88; }
.mus-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Strip */
.mus-strip {
  display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 12px;
  margin-top: 16px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 22px; box-shadow: var(--shadow); padding: 16px;
}
.mus-metric { background: var(--panel-2); border: 1px solid var(--line); border-radius: 18px; padding: 14px; }
.mus-metric span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.mus-metric strong { font-size: 20px; }

/* Tabs */
.mus-tabs {
  display: flex; gap: 10px; flex-wrap: wrap; padding: 14px; margin-top: 16px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow);
}
.mus-tab {
  border: 1px solid var(--line); background: var(--panel-2); color: var(--text);
  padding: 12px 18px; border-radius: 14px; font-weight: 700;
}
.mus-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Main */
.mus-main { margin-top: 16px; display: grid; gap: 16px; }
.mus-panel { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); padding: 24px; }
.mus-hidden { display: none; }

/* Panel head */
.mus-panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 20px; }
.mus-panel-head h2 { margin: 0 0 6px; font-size: 22px; }
.mus-panel-head p { margin: 0; color: var(--muted); }
.mus-panel-acts { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; flex-shrink: 0; }
.mus-inline-stat { font-weight: 700; white-space: nowrap; }

/* Click area */
.mus-click-area {
  position: relative; min-height: 220px; border: 2px dashed var(--line);
  border-radius: 18px; display: flex; align-items: center; justify-content: center;
  cursor: crosshair; user-select: none; overflow: hidden; margin-bottom: 20px;
  background: var(--panel-2); transition: background .15s;
}
.mus-click-area:active { background: var(--accent-soft); }
.mus-click-inner { position: relative; text-align: center; pointer-events: none; }
.mus-click-hint { color: var(--muted); font-size: 16px; margin: 0; }
.mus-click-badge {
  position: absolute; top: 14px; right: 14px;
  background: var(--accent); color: #fff;
  padding: 6px 12px; border-radius: 999px; font-weight: 700; font-size: 14px;
  display: none;
}
.mus-click-ripples { position: absolute; inset: 0; pointer-events: none; }
.mus-ripple {
  position: absolute; transform: translate(-50%,-50%);
  border-radius: 50%; pointer-events: none; animation: musRipple .6s ease-out forwards;
}
@keyframes musRipple {
  from { width: 0; height: 0; opacity: .8; }
  to   { width: 80px; height: 80px; opacity: 0; }
}

/* Button indicators */
.mus-btn-indicators { display: grid; grid-template-columns: repeat(6,1fr); gap: 10px; margin-bottom: 20px; }
.mus-btn-ind {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 16px;
  padding: 14px 10px; text-align: center; display: grid; gap: 6px;
}
.mus-btn-ind.is-active { border-color: var(--accent); background: var(--accent-soft); }
.mus-ind-dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); margin-bottom: 2px; }
.mus-btn-ind span { font-size: 12px; color: var(--muted); }
.mus-btn-ind strong { font-size: 20px; }

/* Click history */
.mus-click-history-wrap h3 { font-size: 16px; margin-bottom: 10px; }
.mus-click-log {
  max-height: 160px; overflow-y: auto; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 14px; padding: 12px;
  display: flex; flex-direction: column-reverse; gap: 4px;
}
.mus-log-entry { font-size: 13px; color: var(--muted); padding: 4px 0; border-bottom: 1px solid var(--line); }
.mus-log-entry:last-child { border: none; }
.mus-empty { color: var(--muted); font-size: 14px; margin: 0; }

/* Move stats */
.mus-move-stats { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 14px; font-size: 14px; }
.mus-move-stats strong { color: var(--accent); }

/* Canvas */
.mus-canvas-wrap {
  position: relative; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line); background: var(--panel-2); min-height: 360px; margin-bottom: 12px;
}
.mus-canvas-wrap canvas { display: block; width: 100%; height: 100%; }
.mus-canvas-msg {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  color: var(--muted); text-align: center; pointer-events: none; font-size: 15px; width: 80%;
}
.mus-canvas-legend { font-size: 13px; color: var(--muted); margin: 0; }

/* Scroll area */
.mus-scroll-area {
  position: relative; min-height: 200px; border: 2px dashed var(--line);
  border-radius: 18px; background: var(--panel-2); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px; cursor: default;
}
.mus-scroll-hint { color: var(--muted); font-size: 16px; pointer-events: none; margin: 0; }
.mus-scroll-indicator {
  position: absolute; bottom: 0; left: 0; height: 4px; width: 0;
  background: var(--accent); border-radius: 2px; transition: width .2s;
}

/* Scroll log */
.mus-scroll-log-wrap h3 { font-size: 16px; margin: 16px 0 10px; }
.mus-scroll-log {
  max-height: 140px; overflow-y: auto; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 14px; padding: 12px;
  display: flex; flex-direction: column-reverse; gap: 4px;
}

/* Stat row */
.mus-stat-row { display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 12px; }
.mus-stat-card { background: var(--panel-2); border: 1px solid var(--line); border-radius: 18px; padding: 16px; }
.mus-stat-card span { display: block; color: var(--muted); font-size: 12px; margin-bottom: 8px; }
.mus-stat-card strong { font-size: 22px; }

/* Accuracy config */
.mus-acc-config { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.mus-acc-config label { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.mus-acc-config select { border: 1px solid var(--line); background: var(--panel-2); color: var(--text); border-radius: 10px; padding: 8px 12px; }

/* Accuracy canvas */
.mus-acc-canvas-wrap {
  position: relative; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line); background: var(--panel-2); min-height: 380px; margin-bottom: 16px;
  cursor: crosshair;
}
.mus-acc-canvas-wrap canvas { display: block; width: 100%; height: 100%; }

/* Responsive */
@media (max-width: 1100px) {
  .mus-stat-row { grid-template-columns: repeat(3,1fr); }
  .mus-btn-indicators { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 980px) {
  .mus-strip { grid-template-columns: repeat(3,1fr); }
  .mus-stat-row { grid-template-columns: repeat(2,1fr); }
  .mus-btn-indicators { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 640px) {
  .mus-strip { grid-template-columns: repeat(2,1fr); }
  .mus-stat-row { grid-template-columns: 1fr; }
  .mus-btn-indicators { grid-template-columns: repeat(2,1fr); }
  .mus-panel-head { flex-direction: column; }
  .mus-title { font-size: 26px; }
}