:root {
  --ink: #e8eef8;
  --muted: #8ea0bb;
  --panel: rgba(12, 16, 26, 0.68);
  --edge: rgba(150, 180, 230, 0.16);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #06070b;
  color: var(--ink);
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  overflow: hidden;
}

#viewport {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: grab;
}

#viewport:active { cursor: grabbing; }

.title-card {
  position: fixed;
  top: 22px;
  left: 26px;
  pointer-events: none;
}

.title-card h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(232, 238, 248, 0.88);
}

.panel {
  position: fixed;
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 14px;
  padding: 14px 16px;
  backdrop-filter: blur(9px);
  font-size: 12.5px;
}

#help {
  left: 26px;
  bottom: 26px;
  max-width: 310px;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

#help.collapsed {
  opacity: 0;
  transform: translateY(14px) scale(0.97);
  pointer-events: none;
}

#help h2 button {
  float: right;
  margin: -2px 8px 0 0;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--edge);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease;
}

#help h2 button:hover { background: rgba(120, 160, 230, 0.16); }

#help h2 button svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#help-open {
  position: fixed;
  left: 26px;
  bottom: 26px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border: 1px solid var(--edge);
  border-radius: 12px;
  background: var(--panel);
  backdrop-filter: blur(9px);
  color: var(--ink);
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(14px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease, background 0.16s ease;
}

#help-open.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

#help-open:hover { background: rgba(26, 34, 52, 0.82); }

#help-open svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: #b7d2ff;
  stroke-width: 1.6;
  stroke-linecap: round;
}

#help h2 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--muted);
}

#help .hint {
  float: right;
  border: 1px solid var(--edge);
  border-radius: 5px;
  padding: 0 6px;
  color: var(--ink);
}

#help ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 5px;
}

#help li {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 10px;
  align-items: baseline;
}

#help b { color: #b7d2ff; font-weight: 600; }
#help span { color: var(--muted); }

.status {
  right: 26px;
  bottom: 26px;
  display: grid;
  gap: 7px;
  min-width: 210px;
}

.status div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.status span {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
}

.status b { font-weight: 600; color: #cfe1ff; }

#toast {
  position: fixed;
  top: 26px;
  right: 26px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(16, 22, 34, 0.82);
  border: 1px solid var(--edge);
  font-size: 13px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

#toast.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 720px) {
  #help { display: none; }
  #help-open { left: 16px; bottom: 16px; }
  .status { right: 16px; bottom: 16px; }
}