/* P.R.T.S. 0.1.53 stabilization layer */
html[data-dsh-prts] {
  --prts-hero-mark-base: clamp(300px, 38%, 520px);
  --prts-hero-mark-size: min(var(--prts-hero-mark-base), 32dvh);
}

/* The native Harness new-session and sidebar collapse controls remain authoritative. */
html[data-dsh-prts] [data-prts-region="sessions"] > * > [data-slot="sidebar"] > :first-child > button[aria-label*="new session" i] {
  min-height: 40px;
  display: grid !important;
  place-items: center;
  margin: 0 0 14px;
  border: 1px solid var(--prts-line) !important;
  border-radius: var(--prts-radius-card) !important;
  background: var(--prts-panel-raised) !important;
  color: var(--prts-ink) !important;
}

/* Rail controls: stable contrast in both schemes, labels never consume rail space. */
html[data-dsh-prts] [data-prts-rail-brand],
html[data-dsh-prts] [data-prts-nav-rail] > button,
html[data-dsh-prts] [data-prts-nav-bottom] > button {
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 48px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-bottom: 1px solid #242b2f;
  border-radius: 0;
  background: transparent;
  color: #aeb8bd !important;
  cursor: pointer;
  clip-path: none;
}

html[data-dsh-prts] [data-prts-rail-brand] {
  height: 64px;
  border-bottom-color: #30383d;
}

html[data-dsh-prts] [data-prts-rail-brand]:is(:hover, :focus-visible),
html[data-dsh-prts] [data-prts-rail-brand][aria-expanded="true"],
html[data-dsh-prts] [data-prts-nav-rail] > button:is(:hover, :focus-visible),
html[data-dsh-prts] [data-prts-nav-bottom] > button:is(:hover, :focus-visible) {
  background: #151a1d;
  color: #f3f6f7 !important;
}

html[data-dsh-prts] [data-prts-theme-disable]::after {
  content: "";
  position: absolute;
  inset: 8px auto 8px 0;
  width: 2px;
  background: var(--prts-yellow);
  transform: scaleY(0);
  transition: transform 160ms var(--prts-ease-snap);
}

html[data-dsh-prts] [data-prts-theme-disable]:is(:hover, :focus-visible) {
  color: var(--prts-yellow) !important;
}

html[data-dsh-prts] [data-prts-theme-disable]:is(:hover, :focus-visible)::after {
  transform: scaleY(1);
}

html[data-dsh-prts] [data-prts-theme-disable-icon] {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 120ms var(--prts-ease-snap), opacity 120ms ease;
}

html[data-dsh-prts] [data-prts-theme-disable]:active [data-prts-theme-disable-icon] {
  opacity: .72;
  transform: scale(.9);
}

html[data-dsh-prts] [data-prts-rail-brand][aria-expanded="true"]::after {
  content: "";
  position: absolute;
  inset: 7px auto 7px 0;
  width: 2px;
  background: var(--prts-yellow);
}

html[data-dsh-prts] [data-prts-nav-rail] small,
html[data-dsh-prts] [data-prts-connection-label] {
  position: absolute;
  z-index: 180;
  top: 50%;
  left: calc(100% + 9px);
  width: max-content;
  max-width: 180px;
  padding: 6px 8px;
  border: 1px solid #3d474d;
  border-radius: 3px;
  opacity: 0;
  background: #0e1215;
  color: #eef2f3;
  font: 700 9px/1.2 var(--prts-mono);
  letter-spacing: .04em;
  text-align: left;
  transform: translate3d(-5px, -50%, 0);
  transition: opacity 130ms ease, transform 160ms var(--prts-ease-snap);
  pointer-events: none;
  white-space: nowrap;
}

html[data-dsh-prts] [data-prts-nav-rail] button:is(:hover, :focus-visible) small,
html[data-dsh-prts] [data-prts-connection-indicator]:is(:hover, :focus-visible) [data-prts-connection-label] {
  opacity: 1;
  transform: translate3d(0, -50%, 0);
}

html[data-dsh-prts] [data-prts-connection-indicator] {
  position: relative;
  min-height: 38px;
  padding: 0;
  color: #9da8ad;
}

html[data-dsh-prts] [data-prts-nav-bottom] svg,
html[data-dsh-prts] [data-prts-nav-bottom] b {
  display: block;
  color: currentColor;
}


/* Complete structural outlines; decorative accents are separate edges. */
html[data-dsh-prts] [data-composer-card],
html[data-dsh-prts] [data-prts-composer-fallback],
html[data-dsh-prts] [data-composer-card] button:not([data-slot="conversation.input.attachments"] *):not([data-prts-glass-menu] *):not([data-prts-floating-glass] *):not([role="menu"] *):not([role="listbox"] *),
html[data-dsh-prts] [data-prts-conversation-control],
html[data-dsh-prts] [data-produced-files-row] > button[type="button"],
html[data-dsh-prts] [data-prts-to-bottom] {
  border-radius: 3px !important;
  clip-path: none !important;
}


html[data-dsh-prts] [data-prts-facility-face] {
  right: 0 !important;
  border: 0 !important;
  background: var(--prts-line-strong);
}

html[data-dsh-prts] [data-prts-facility-face]::after {
  content: "";
  position: absolute;
  inset: 1px;
  background: var(--prts-panel-raised);
  clip-path: polygon(
    3px 0, calc(50% - 25px) 0, calc(50% - 20px) 3.333px, calc(50% + 20px) 3.333px, calc(50% + 25px) 0,
    calc(100% - 3px) 0, 100% 3px, 100% calc(50% - 5px), calc(100% - 2px) calc(50% - 3px), calc(100% - 2px) calc(50% + 3px), 100% calc(50% + 5px),
    100% calc(100% - 3px), calc(100% - 3px) 100%, 3px 100%, 0 calc(100% - 3px),
    0 calc(50% + 5px), 2px calc(50% + 3px), 2px calc(50% - 3px), 0 calc(50% - 5px), 0 3px
  );
}

html[data-dsh-prts] [data-prts-workspace-actions] button,
html[data-dsh-prts] [data-prts-session-actions] button {
  border: 1px solid var(--prts-line-strong) !important;
  border-radius: 3px !important;
  clip-path: none !important;
}

/* Explicit two-row empty state: particle emblem above, composer below. */
html[data-dsh-prts] [data-prts-hero-active] {
  display: grid;
  grid-template-rows: minmax(220px, 1fr) auto;
  align-content: center;
  gap: clamp(28px, 5dvh, 54px);
  padding-top: 24px;
  padding-bottom: 34px;
}

html[data-dsh-prts] [data-prts-hero-active] [data-phase="hero"] {
  min-height: min(36dvh, 390px);
  align-self: end;
}

html[data-dsh-prts] [data-prts-hero-active] [data-composer-seat] {
  align-self: start;
  justify-self: center;
}