:root {
  --bg0: #07090d;
  --bg1: #0b1020;
  --fg0: rgba(245, 247, 255, 0.94);
  --fg1: rgba(245, 247, 255, 0.74);
  --line: rgba(255, 255, 255, 0.1);
  --accent: #52e3ff;
  --warn: #ff7a9a;
  --ok: #53e790;
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  color: var(--fg0);
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(
      1200px 700px at 20% 0%,
      rgba(82, 227, 255, 0.12),
      transparent 60%
    ),
    radial-gradient(
      900px 600px at 80% 100%,
      rgba(255, 224, 122, 0.08),
      transparent 60%
    ),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(9, 14, 25, 0.82);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}
.brand small {
  display: block;
  color: var(--fg1);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.brand b {
  display: block;
  font-size: 16px;
}

.mark {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: linear-gradient(
    135deg,
    rgba(82, 227, 255, 0.95),
    rgba(255, 224, 122, 0.9)
  );
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.nav a {
  color: var(--fg1);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 13px;
}
.nav a:hover {
  color: #fff;
  border-color: rgba(82, 227, 255, 0.4);
}

.wrap {
  padding: 14px;
  display: grid;
  gap: 12px;
  height: calc(100vh - 64px);
}
.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(8, 14, 24, 0.62);
}

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
}

.left {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg1);
}
.left code {
  color: var(--fg0);
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 3px rgba(255, 122, 154, 0.15);
}
.dot.ok {
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(83, 231, 144, 0.15);
}
.dot.bad {
  background: var(--warn);
}

.actions {
  display: inline-flex;
  gap: 8px;
}
button,
.btn {
  border: 1px solid var(--line);
  background: rgba(12, 18, 30, 0.8);
  color: var(--fg0);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  text-decoration: none;
}
button:hover,
.btn:hover {
  border-color: rgba(82, 227, 255, 0.4);
}

.frame-wrap {
  overflow: hidden;
  min-height: 0;
  flex: 1;
  height: 100%;
}

iframe {
  width: 100%;
  height: 100%;
  min-height: 540px;
  border: 0;
  background: #000;
}

@media (max-width: 900px) {
  .controls {
    flex-direction: column;
    align-items: flex-start;
  }
  .wrap {
    height: auto;
  }
  iframe {
    min-height: 70vh;
  }
}