:root {
  color-scheme: dark;
  font-family: "Atkinson Hyperlegible Next", system-ui, sans-serif;
  --page: #101619;
  --panel: #161f22;
  --line: #354447;
  --ink: #f1f6f4;
  --muted: #a8b8b6;
  --accent: #a3ecd1;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
  margin: 0;
  color: var(--ink);
  background: var(--page);
}

button, input { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .68; }
button:focus-visible, input:focus-visible, a:focus-visible, img:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.topbar {
  min-height: 64px;
  padding: 12px clamp(16px, 3vw, 38px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.075rem;
  font-weight: 700;
  letter-spacing: -.04em;
}

.brand-symbol {
  width: 21px;
  height: 16px;
  border: 1.5px solid var(--accent);
  border-radius: 3px;
  position: relative;
}

.brand-symbol::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 6px;
  width: 7px;
  height: 7px;
  border: solid var(--accent);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(-45deg);
}

main { min-width: 0; min-height: 0; }
.entry {
  width: min(calc(100% - 32px), 440px);
  margin: clamp(34px, 14vh, 152px) auto 40px;
  padding: clamp(22px, 5vw, 42px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
}

.eyebrow {
  color: var(--accent);
  font-size: .78rem;
  font-weight: 650;
  letter-spacing: .09em;
  text-transform: uppercase;
  margin: 0 0 13px;
}

h1 {
  margin: 0;
  font-size: clamp(1.9rem, 5vw, 2.45rem);
  letter-spacing: -.055em;
  line-height: 1.07;
}

.entry-description, .status, .viewer-footer { color: var(--muted); }
.entry-description { margin: 14px 0 26px; line-height: 1.45; }

form { display: grid; gap: 10px; }
label { font-weight: 600; font-size: .875rem; }

input {
  color: var(--ink);
  background: var(--page);
  border: 1px solid var(--line);
  border-radius: 6px;
  min-width: 0;
  width: 100%;
  padding: 11px 13px;
}

.primary {
  margin-top: 6px;
  min-height: 44px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #142a23;
  font-weight: 700;
}

.primary:hover:not(:disabled) { background: #bdffea; }
.status { min-height: 2.5em; margin: 14px 0 0; font-size: .85rem; }
.status[data-error="true"] { color: #ffbead; }

.session-tools, .viewport-options {
  display: flex;
  align-items: center;
  gap: 5px;
}

.session-tools { gap: clamp(4px, 2vw, 18px); }
.viewport-options {
  background: var(--panel);
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
}

.mode, .quiet {
  color: var(--muted);
  border: 0;
  background: none;
  border-radius: 5px;
  padding: 7px clamp(5px, 1.7vw, 12px);
  font-size: .85rem;
  font-weight: 600;
}

.mode[aria-pressed="true"] { color: var(--ink); background: #2a3a3e; }
.mode:hover, .quiet:hover { color: var(--ink); }

.viewer {
  height: 100%;
  padding: clamp(7px, 2vw, 24px);
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 8px;
}

.stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
  background: #0b0f11;
  border: 1px solid var(--line);
  border-radius: 7px;
}

#frame {
  position: absolute;
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#frame:focus-visible { outline-offset: -2px; }
.placeholder { color: var(--muted); text-align: center; margin: 1rem; }
.viewer-footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 4px 14px; }
.viewer-footer p { margin: 0; font-size: .82rem; }
#viewer-status { color: var(--accent); }

@media (max-width: 400px) {
  .topbar { gap: 8px; padding-inline: 8px; }
  .brand { gap: 5px; font-size: 1rem; }
  .brand-symbol { transform: scale(.9); }
  .mode, .quiet { font-size: .78rem; }
}