:root {
  --bg: #dff4ff;
  --panel: rgba(255, 255, 255, 0.72);
  --ink: #111111;
  --muted: #4b5563;
  --blue: #2f8dff;
  --blue-dark: #0e5bd8;
  --magenta: #ff2fb2;
  --line: rgba(17, 17, 17, 0.12);
  --shadow: 0 24px 60px rgba(14, 91, 216, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.52), rgba(217, 242, 255, 0) 44%),
    var(--bg);
  color: var(--ink);
  font-family: SimHei, "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

button,
select,
input {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 20px;
  padding: 24px;
}

.control-panel,
.stage-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.control-panel {
  border-radius: 20px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.stage-panel {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  min-height: calc(100vh - 48px);
  display: flex;
  flex-direction: column;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #ffffff 0 20%, transparent 22%),
    linear-gradient(135deg, #0e5bd8, #36cbff 54%, #ff2fb2);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.72);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.1;
}

h2 {
  font-size: 20px;
  line-height: 1.2;
}

#statusText {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.field-label {
  font-size: 15px;
  color: var(--ink);
}

.select-control,
.upload-button,
.primary-button,
.secondary-button {
  width: 100%;
  min-height: 46px;
  border-radius: 16px;
  border: 1px solid rgba(17, 17, 17, 0.14);
  color: var(--ink);
}

.select-control {
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%) calc(100% - 22px) 52% / 7px 7px no-repeat,
    linear-gradient(135deg, #ffffff, #eefaff);
  padding: 0 42px 0 14px;
  cursor: pointer;
}

.upload-button,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.upload-button {
  background: #ffffff;
}

.secondary-button {
  min-height: 40px;
  background: rgba(255, 255, 255, 0.84);
}

.primary-button {
  background: linear-gradient(135deg, var(--blue), #55d7ff);
  border-color: rgba(14, 91, 216, 0.35);
  box-shadow: 0 12px 22px rgba(47, 141, 255, 0.24);
}

.upload-button:hover,
.primary-button:hover:not(:disabled),
.secondary-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  box-shadow: none;
}

#audioInput,
#scoreInput {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.score-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.file-list {
  display: grid;
  gap: 8px;
  min-height: 76px;
}

.file-pill {
  min-width: 0;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(17, 17, 17, 0.08);
}

.file-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 14px;
}

.file-meta {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.progress-wrap {
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: #2f8dff;
  overflow: hidden;
}

.progress-bar {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--magenta);
  transition: width 180ms ease;
}

#guitarCanvas,
#staffCanvas {
  display: block;
}

.guitar-viewport {
  position: relative;
  flex: 1 1 auto;
  min-height: 420px;
  overflow: hidden;
}

#guitarCanvas {
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
  user-select: none;
}

#guitarCanvas.is-dragging {
  cursor: grabbing;
}

.stage-tools {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 2;
  display: flex;
  gap: 8px;
  padding: 6px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 14px 30px rgba(17, 17, 17, 0.09);
  backdrop-filter: blur(12px);
}

.stage-tool {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 50%;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  line-height: 1;
  font-size: 19px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    transform 140ms ease,
    background 140ms ease;
}

.stage-tool:hover {
  transform: translateY(-1px);
  background: #eefaff;
}

.string-buttons {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

.string-tone-button {
  position: absolute;
  width: 42px;
  height: 28px;
  border: 1px solid rgba(17, 17, 17, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
  box-shadow: 0 10px 22px rgba(17, 17, 17, 0.12);
  cursor: pointer;
  pointer-events: auto;
  transform: translate(-50%, -50%);
  transition:
    background 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

.string-tone-button:hover,
.string-tone-button.is-selected {
  background: #dff4ff;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(47, 141, 255, 0.18), 0 12px 24px rgba(17, 17, 17, 0.14);
  transform: translate(-50%, -50%) scale(1.06);
}

.staff-panel {
  flex: 0 0 178px;
  border-top: 1px solid rgba(17, 17, 17, 0.1);
  background: rgba(247, 252, 255, 0.78);
  padding: 12px 18px 14px;
}

.staff-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 14px;
}

#staffMeta {
  color: var(--muted);
}

.score-slider {
  width: 100%;
  height: 20px;
  margin: 0 0 6px;
  accent-color: var(--blue);
  cursor: pointer;
}

.score-slider:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

#staffCanvas {
  width: 100%;
  height: 112px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.72);
}

.result-ribbon {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(142px, 1fr));
  gap: 10px;
  pointer-events: none;
}

.result-chip {
  border-radius: 16px;
  border: 1px solid rgba(17, 17, 17, 0.1);
  background: rgba(255, 255, 255, 0.74);
  padding: 10px 12px;
  box-shadow: 0 12px 26px rgba(17, 17, 17, 0.08);
  animation: chipRise 420ms ease both;
}

.result-chip strong {
  display: block;
  font-size: 14px;
}

.result-chip span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.result-dialog {
  width: min(620px, calc(100vw - 32px));
  border: 0;
  border-radius: 22px;
  padding: 20px;
  background: #f7fcff;
  color: var(--ink);
  box-shadow: 0 30px 90px rgba(17, 17, 17, 0.24);
}

.result-dialog::backdrop {
  background: rgba(4, 22, 42, 0.38);
}

.dialog-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.icon-button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(17, 17, 17, 0.12);
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
}

#resultText {
  margin: 0;
  max-height: min(60vh, 540px);
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: SimHei, "Microsoft YaHei", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

@keyframes chipRise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 14px;
    width: 100vw;
    max-width: 100vw;
    overflow: hidden;
  }

  .control-panel,
  .stage-panel {
    width: 100%;
    max-width: 100%;
  }

  .stage-panel {
    min-height: 56vh;
  }

  .guitar-viewport {
    min-height: 360px;
  }

  .staff-panel {
    flex-basis: 156px;
    padding: 10px 12px 12px;
  }

  #staffCanvas {
    height: 98px;
  }

  .stage-tools {
    top: 12px;
    right: auto;
    left: 12px;
    gap: 6px;
    padding: 5px;
  }

  .stage-tool {
    width: 34px;
    height: 34px;
    font-size: 17px;
  }

  .control-panel {
    border-radius: 18px;
  }

  .result-ribbon {
    left: 12px;
    right: 12px;
    bottom: 12px;
    grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  }
}