* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, sans-serif;
  background: #18181b;
  min-height: 100vh;
  display: flex;
  flex-direction: column;

  /* ── Protect content ── */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* ── Header ─────────────────────────────────────────── */
#header {
  background: #09090b;
  color: #fff;
  padding: .55rem 1.25rem;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  flex-wrap: wrap;
  border-bottom: 1px solid #27272a;
}

#doc-title {
  font-size: .92rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 55%;
  color: #f4f4f5;
}

/* ── Profile block ───────────────────────────────────── */
#profile {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
  text-decoration: none;
  flex-shrink: 0;
  padding: .2rem .45rem;
  border-radius: 7px;
  border: 1px solid transparent;
  transition: border-color .15s, background .15s;
}

#profile:hover {
  border-color: #3b82f6;
  background: rgba(59,130,246,.08);
}

#profile-name {
  font-size: .82rem;
  font-weight: 600;
  color: #e4e4e7;
  white-space: nowrap;
  letter-spacing: .01em;
}

#profile-tag {
  font-size: .7rem;
  color: #3b82f6;
  white-space: nowrap;
  letter-spacing: .02em;
}

/* ── Viewer wrap ─────────────────────────────────────── */
#viewer-wrap {
  flex: 1;
  display: none;
}

iframe {
  width: 100%;
  height: 100%;
  min-height: calc(100vh - 52px);
  border: none;
  display: block;
}

/* ── Loading screen ──────────────────────────────────── */
#loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 100vh;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid #3f3f46;
  border-top-color: #3b82f6;
  border-radius: 50%;
  animation: spin .75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

#load-text {
  color: #a1a1aa;
  font-size: .9rem;
}

/* ── Error screen ────────────────────────────────────── */
#error-screen {
  flex: 1;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  min-height: 100vh;
  text-align: center;
  padding: 2rem;
}

#error-screen h2 {
  color: #f4f4f5;
  font-size: 1.1rem;
}

#error-screen p {
  color: #71717a;
  font-size: .85rem;
  max-width: 320px;
  line-height: 1.6;
}

#error-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #27272a;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: .25rem;
}

/* ── Mobile ──────────────────────────────────────────── */
@media (max-width: 480px) {
  #doc-title   { font-size: .78rem; max-width: 48%; }
  #profile-name { font-size: .75rem; }
  #profile-tag  { font-size: .66rem; }
}