:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #15243a;
  --muted: #627187;
  --accent: #1578ff;
  --border: #d7e0ea;
  --shadow: 0 8px 20px rgba(0, 24, 64, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "SF Pro Text", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 10%, #e8f0ff 0%, var(--bg) 45%);
}

.app {
  max-width: 1024px;
  margin: 0 auto;
  padding: 18px;
  display: grid;
  gap: 14px;
}

.topbar,
.status-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 880px) {
  .topbar {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .status-row {
    grid-template-columns: 1fr 1fr;
  }
}

h1,
h2 {
  margin: 0 0 6px;
}

h1 {
  font-size: 1.4rem;
}

h2 {
  font-size: 1rem;
}

.hint,
.muted {
  color: var(--muted);
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

button,
select {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  padding: 8px 10px;
  font-size: 0.95rem;
}

button {
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

.layout-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  box-shadow: var(--shadow);
}

.card p {
  margin: 4px 0;
}

.controller {
  margin-top: 8px;
  border-radius: 18px;
  border: 1px solid #d9dee7;
  padding: 14px;
  background: #f3f4f6;
}

#padCanvas {
  display: block;
  width: 100%;
  height: 430px;
  border-radius: 14px;
  background: #d9d9d9;
}

.axes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
}

.rate-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.rate-controls label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.rate-controls input {
  width: 74px;
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 6px 8px;
}

.rate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
}

.vib-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
}

.vib-enable {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hid-raw {
  margin: 0;
  min-height: 90px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fbff;
  color: #243653;
  padding: 10px;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.floating-actions {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 20;
  display: grid;
  gap: 8px;
}

.floating-btn {
  background: #1578ff;
  color: #fff;
  border-color: #1578ff;
  box-shadow: 0 8px 20px rgba(21, 120, 255, 0.3);
}

.floating-btn.secondary {
  background: #0f9b8e;
  border-color: #0f9b8e;
  box-shadow: 0 8px 20px rgba(15, 155, 142, 0.24);
}

.floating-btn:hover {
  border-color: #0f62d5;
  background: #0f62d5;
}

.floating-btn.secondary:hover {
  border-color: #0a7c72;
  background: #0a7c72;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(16, 28, 47, 0.48);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 18px;
}

.hidden {
  display: none;
}

.modal-content {
  width: min(760px, 100%);
  max-height: 88vh;
  overflow: auto;
  background: #fff;
  border-radius: 14px;
  border: 1px solid #d6e0ed;
  box-shadow: 0 14px 30px rgba(13, 27, 52, 0.2);
  padding: 14px;
  display: grid;
  gap: 12px;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-head h3 {
  margin: 0;
  font-size: 1.02rem;
}

.ghost-btn {
  background: #f6f8fc;
}

.virtual-enable {
  display: flex;
  align-items: center;
  gap: 8px;
}

.virtual-section h4 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.virtual-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
}

.virtual-buttons label,
.virtual-axes label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}

.virtual-axes {
  display: grid;
  gap: 8px;
}

.virtual-axes input[type="range"] {
  flex: 1;
}

.trace-modal {
  width: min(980px, 100%);
}

.trace-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.trace-panel {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #f7fbff;
}

.trace-panel h4 {
  margin: 0 0 8px;
  font-size: 0.95rem;
}

.trace-value {
  margin: 8px 0 0;
  color: #30445f;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

.trace-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 300px;
  border-radius: 10px;
  border: 1px solid #cfdae8;
  background: linear-gradient(180deg, #fbfdff, #eef4fb);
}

.trace-actions {
  display: flex;
  justify-content: flex-end;
}

@media (min-width: 860px) {
  .trace-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  #padCanvas {
    height: 360px;
  }

  .floating-actions {
    right: 12px;
    bottom: 12px;
  }

  .trace-canvas {
    min-height: 240px;
  }
}