:root {
  color-scheme: dark;
  font-family: Inter, "Microsoft YaHei", system-ui, sans-serif;
  background: #080d12;
  color: #edf6f8;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 760px;
  min-height: 100vh;
  margin: 0;
  padding: 14px;
  background:
    radial-gradient(circle at 12% 0%, rgba(40, 150, 174, 0.18), transparent 34%),
    #080d12;
}

button {
  min-height: 32px;
  padding: 6px 11px;
  border: 1px solid rgba(122, 218, 235, 0.32);
  border-radius: 8px;
  color: #effcff;
  background: rgba(23, 91, 107, 0.72);
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: rgba(151, 235, 250, 0.75);
  background: rgba(27, 116, 136, 0.9);
}

button:disabled {
  cursor: default;
  opacity: 0.42;
}

button.is-secondary {
  background: rgba(52, 67, 75, 0.76);
}

button.is-danger {
  border-color: rgba(255, 130, 130, 0.34);
  background: rgba(114, 39, 42, 0.78);
}

.iphone-memory-warning {
  max-width: 850px;
  margin: 0 auto 12px;
  padding: 9px 12px;
  border: 1px solid rgba(255, 185, 92, 0.42);
  border-radius: 9px;
  color: #ffdca8;
  background: rgba(89, 51, 11, 0.72);
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
}

.iphone-memory-warning[hidden] {
  display: none;
}

.instance-manager-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 850px;
  margin: 0 auto 12px;
}

.instance-manager-header h1 {
  margin: 0;
  font-size: 22px;
}

.instance-manager-header p {
  margin: 4px 0 0;
  color: #91a8af;
  font-size: 13px;
}

.instance-manager-actions,
.instance-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.instance-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(250px, 420px));
  gap: 10px;
  max-width: 850px;
  margin: 0 auto;
  justify-content: center;
  align-items: start;
}

.instance-card {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-rows: auto auto;
  overflow: hidden;
  border: 1px solid rgba(142, 205, 218, 0.2);
  border-radius: 12px;
  background: #030608;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.26);
}

.instance-card-header {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
  padding: 8px 10px;
  background: linear-gradient(90deg, rgba(20, 56, 66, 0.94), rgba(15, 31, 38, 0.94));
}

.instance-card-header > div:first-child {
  display: grid;
  min-width: 0;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 2px;
  text-align: left;
}

.instance-card-actions button {
  flex: 1 1 52px;
  padding-right: 7px;
  padding-left: 7px;
}

.instance-card-header output {
  overflow: hidden;
  color: #9bb4ba;
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}

.instance-card-header output[data-state="ready"] {
  color: #7ce7b0;
}

.instance-card-header output[data-state="error"] {
  color: #ff9b9b;
}

.instance-frame-host {
  position: relative;
  aspect-ratio: 9 / 16;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: #000;
}

.instance-frame-viewport {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 720px;
  height: 1280px;
  transform: translate(-50%, -50%) scale(0.5);
  transform-origin: center;
}

.instance-frame-host iframe {
  display: block;
  width: 720px;
  height: 1280px;
  border: 0;
  background: #000;
}

.instance-placeholder {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 90%;
  margin: 0;
  transform: translate(-50%, -50%);
  color: #71858b;
  text-align: center;
}

.instance-card.is-focused {
  position: fixed;
  z-index: 100;
  inset: 8px;
  border-color: rgba(121, 226, 246, 0.65);
}

body.has-focused-instance {
  overflow: hidden;
}

@media (max-width: 1060px) {
  .instance-grid {
    justify-content: start;
  }
}