* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #f4f6fb;
  color: #131722;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

#app {
  padding: 32px 16px;
}

.page {
  width: min(960px, 100%);
  margin: 0 auto;
}

.panel {
  border: 1px solid #d6dbe5;
  border-radius: 16px;
  background: #fff;
  padding: 26px 22px 22px;
  box-shadow: 0 12px 28px rgba(22, 31, 53, 0.08);
}

.hero {
  position: relative;
  margin-bottom: 18px;
}

h1 {
  margin: 0;
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.demo-toggle {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #495368;
  user-select: none;
}

.demo-toggle input {
  width: 14px;
  height: 14px;
  margin: 0;
}

.drop-area {
  width: min(360px, 100%);
  height: 186px;
  margin: 0 auto 22px;
  border: 1px dashed #9ca8bc;
  border-radius: 14px;
  background: #f8faff;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: 0.18s ease;
}

.drop-area.dragover {
  border-color: #4f7cff;
  background: #eef3ff;
}

.drop-area input {
  display: none;
}

#drop-label {
  max-width: calc(100% - 24px);
  font-size: 18px;
  color: #1f2839;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drop-tip {
  font-size: 12px;
  color: #6c7688;
}

.row {
  display: grid;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.login-row {
  grid-template-columns: auto minmax(170px, 1fr) auto minmax(170px, 1fr) auto;
}

.action-row {
  grid-template-columns: auto auto minmax(210px, 1fr) auto;
}

.k {
  font-size: 13px;
  font-weight: 600;
  color: #4f5a6d;
  white-space: nowrap;
}

input {
  width: 100%;
  height: 36px;
  border: 1px solid #cfd6e2;
  border-radius: 10px;
  padding: 0 11px;
  font-size: 14px;
  background: #fdfdff;
  color: #111827;
}

input:focus {
  outline: 2px solid #dce5ff;
  border-color: #7090f8;
  background: #fff;
}

button {
  height: 36px;
  border: 1px solid #111827;
  border-radius: 10px;
  background: #111827;
  color: #fff;
  padding: 0 13px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: 0.15s ease;
}

button:hover {
  background: #1f2a3d;
}

#pair-device-btn {
  border-color: #cfd6e2;
  background: #fff;
  color: #182033;
}

#pair-device-btn:hover {
  background: #f4f7ff;
}

button:disabled {
  opacity: 0.46;
  cursor: not-allowed;
}

.udid {
  display: block;
  min-height: 36px;
  line-height: 36px;
  border: 1px solid #cfd6e2;
  border-radius: 10px;
  padding: 0 10px;
  background: #f8faff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  color: #1f2a3d;
}

.status-line {
  margin-top: 10px;
  border: 1px solid #d8deea;
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 12px;
  background: #f9fbff;
  color: #495368;
  overflow-wrap: anywhere;
}

.progress-wrap {
  margin-top: 10px;
  border: 1px solid #d8deea;
  border-radius: 10px;
  background: #f9fbff;
  padding: 8px 10px 10px;
}

.progress-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: #495368;
  margin-bottom: 8px;
}

.progress-track {
  height: 10px;
  border-radius: 999px;
  background: #e8edf9;
  overflow: hidden;
}

.progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #7aa2ff 0%, #4f7cff 100%);
  transition: width 0.2s ease;
}

.log {
  margin: 12px 0 0;
  height: 240px;
  border: 1px solid #d7dce9;
  border-radius: 12px;
  background: #fbfcff;
  color: #1f2a3d;
  padding: 10px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

body.demo-mode .status-line,
body.demo-mode .progress-wrap,
body.demo-mode .log,
body.demo-mode .udid {
  background: #f2f4f9;
}

@media (max-width: 900px) {
  #app {
    padding: 18px 12px;
  }

  .panel {
    padding: 20px 14px 14px;
    border-radius: 12px;
  }

  .hero {
    display: grid;
    gap: 8px;
    justify-items: center;
  }

  .demo-toggle {
    position: static;
    transform: none;
  }

  .drop-area {
    width: 100%;
  }

  .login-row,
  .action-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}