:root {
  color-scheme: dark;
  --bar: #08090c;
  --line: rgba(255, 255, 255, 0.11);
  --text: #f7f7f8;
  --muted: #9b9da5;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bar);
  color: var(--text);
  font-family: "DM Sans", system-ui, sans-serif;
}

.tool-page {
  height: 100%;
  display: grid;
  grid-template-rows: 58px minmax(0, 1fr);
}

.tool-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 max(18px, env(safe-area-inset-right)) 0 max(18px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--line);
  background: rgba(8, 9, 12, 0.96);
}

.back,
.tool-name {
  display: inline-flex;
  align-items: center;
}

.back {
  gap: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

.back:hover,
.back:focus-visible { color: var(--text); }
.back:focus-visible { outline: 2px solid currentColor; outline-offset: 5px; border-radius: 2px; }
.back svg { width: 18px; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.tool-name {
  gap: 9px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.tool-name::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.frame-wrap {
  position: relative;
  min-height: 0;
  background: #0b0c10;
}

.loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.85rem;
}

iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
}

@media (max-width: 520px) {
  .tool-page { grid-template-rows: 52px minmax(0, 1fr); }
  .tool-header { padding-inline: 14px; }
  .back span { display: none; }
  .tool-name { font-size: 0.7rem; }
}