/* ── Subsystem ── */
.subsystem-screen {
  display: grid;
  gap: 11px;
}

.subsystem-topbar {
  display: grid;
  gap: 14px;
  padding: 16px 18px;
}

.pdf-topbar {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.pdf-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.pdf-brand .aca-logo-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  flex-shrink: 0;
}

.pdf-brand .aca-logo-badge img {
  width: 24px;
  height: 24px;
}

.pdf-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.pdf-top-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.auth-screen {
  display: grid;
  place-items: center;
  min-height: calc(100vh - 160px);
  padding: 16px;
}

.auth-card {
  width: min(720px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 300px);
  gap: 24px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.auth-copy {
  display: grid;
  gap: 10px;
}

.auth-card h2 {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.auth-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.auth-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 12px;
  color: var(--text-muted);
  background: #f2f6fc;
  border: 1px solid var(--line);
}

.auth-form {
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
}

.auth-field {
  display: grid;
  gap: 6px;
}

.auth-field span,
.auth-checkbox span,
.auth-hint,
.auth-error {
  font-size: 13px;
  line-height: 1.5;
}

.auth-field span,
.auth-checkbox span,
.auth-hint {
  color: var(--text-muted);
}

.auth-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.auth-checkbox input {
  margin-top: 2px;
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.auth-error {
  color: var(--danger);
  font-weight: 500;
}

.state-card {
  padding: 24px;
  display: grid;
  gap: 14px;
}

.state-card h2 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.state-card p,
.state-hint,
.card-meta,
.inline-notice {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 14px;
}

.state-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
}

.subsystem-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.subsystem-toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.subsystem-title-wrap {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.subsystem-title-row {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.subsystem-title {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.2;
  font-weight: 680;
}

.subsystem-subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.subsystem-toolbar-actions {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.subsystem-topbar