:root {
  --bg: #dcdcdc;
  --panel: #c0c0c0;
  --border-dark: #404040;
  --blue: #000080;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: #111;
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}
.window {
  width: min(880px, 100%);
  background: var(--panel);
  border: 2px solid var(--border-dark);
  box-shadow: inset 2px 2px #fff, inset -2px -2px var(--border-dark);
}
.titlebar {
  background: var(--blue);
  color: #fff;
  padding: 8px 12px;
  font-weight: bold;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.content {
  padding: 20px;
  border-top: 2px solid #808080;
  border-bottom: 2px solid #808080;
  background: var(--panel);
}
.card {
  background: #f2f2f2;
  border: 2px solid var(--border-dark);
  box-shadow: inset 2px 2px #fff, inset -2px -2px var(--border-dark);
  padding: 18px;
}
h1 { font-size: 20px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 0 0 8px; }
p { margin: 6px 0; }
.footer {
  padding: 10px 12px;
  font-size: 12px;
  color: #333;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  appearance: none;
  border: 2px solid var(--border-dark);
  background: #e6e6e6;
  padding: 8px 14px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: inset 2px 2px #fff, inset -2px -2px var(--border-dark);
}
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}
.progress {
  height: 8px;
  background: #e0e0e0;
  border: 2px solid var(--border-dark);
  box-shadow: inset 2px 2px #fff, inset -2px -2px var(--border-dark);
  position: relative;
}
.progress > div {
  height: 100%;
  background: var(--blue);
  width: 0%;
  transition: width 200ms ease;
}
.expired {
  text-align: center;
  padding: 24px;
}
code.kv { background: #fff; padding: 2px 6px; border: 1px solid #bbb; }