/* ══════════════════════════════════════════════════════
   Front Door Overlay — Digital Spec
   Additive only; no existing styles overridden.
══════════════════════════════════════════════════════ */

/* ── Overlay shell ── */
#fd-overlay {
  position: fixed;
  inset: 0;
  z-index: 1060;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  /* pointer-events blocked while collapsed */
}

#fd-overlay.fd-collapsed {
  pointer-events: none;
}

/* ── Backdrop ── */
#fd-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(1, 4, 9, 0.82);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  transition: opacity 0.25s ease;
}

#fd-overlay.fd-collapsed #fd-backdrop {
  opacity: 0;
  pointer-events: none;
}

/* ── Panel ── */
#fd-panel {
  position: relative;
  z-index: 1;
  background: #0d1117;
  border: 1px solid #30363d;
  border-radius: 12px;
  width: 100%;
  max-width: 600px;
  max-height: min(90vh, 720px);
  display: flex;
  flex-direction: column;
  box-shadow:
    0 0 0 1px rgba(110, 64, 201, 0.18),
    0 24px 64px rgba(0, 0, 0, 0.65);
  /* Transition drives both open and collapse */
  transition:
    opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Suppress transitions during the instant-collapse on page restore */
#fd-overlay.fd-no-transition #fd-panel,
#fd-overlay.fd-no-transition #fd-backdrop { transition: none; }

@media (prefers-reduced-motion: reduce) {
  #fd-panel,
  #fd-backdrop,
  #fd-tab { transition: none !important; }
}

/* ── Header ── */
#fd-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  background: #010409;
  border-bottom: 1px solid #30363d;
  border-radius: 12px 12px 0 0;
  flex-shrink: 0;
}

#fd-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

#fd-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6e40c9 0%, #b392f0 100%);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  user-select: none;
}

#fd-speaker-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: #e6edf3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Persistent header controls ── */
#fd-persistent {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.fd-persistent-btn {
  padding: 5px 11px;
  border-radius: 20px;
  font-size: 0.73rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.fd-skip-btn {
  background: transparent;
  border: 1px solid #30363d;
  color: #8b949e;
}

.fd-skip-btn:hover,
.fd-skip-btn:focus-visible {
  border-color: #6e40c9;
  color: #c9d1d9;
  outline: 2px solid #6e40c9;
  outline-offset: 2px;
}

.fd-contact-btn {
  background: #6e40c9;
  border: 1px solid #6e40c9;
  color: #fff;
}

.fd-contact-btn:hover,
.fd-contact-btn:focus-visible {
  background: #9b7fd4;
  border-color: #9b7fd4;
  outline: 2px solid #b392f0;
  outline-offset: 2px;
}

/* ── Minimise button ── */
.fd-minimize-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid #30363d;
  color: #8b949e;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
  padding: 0;
}

.fd-minimize-btn:hover,
.fd-minimize-btn:focus-visible {
  border-color: #6e40c9;
  color: #c9d1d9;
  background: #161b22;
  outline: 2px solid #6e40c9;
  outline-offset: 2px;
}

/* ── Scroll container ── */
#fd-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 18px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 0;
  scrollbar-width: thin;
  scrollbar-color: #30363d transparent;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  #fd-scroll { scroll-behavior: auto; }
}

/* ── Dialogue area ── */
#fd-dialogue {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.fd-bubble {
  max-width: 86%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.6;
  word-break: break-word;
}

.fd-bubble-spec {
  background: #161b22;
  border: 1px solid #30363d;
  color: #c9d1d9;
  align-self: flex-start;
  border-bottom-left-radius: 3px;
}

.fd-bubble-user {
  background: #21122e;
  border: 1px solid #6e40c9;
  color: #d2b3ff;
  align-self: flex-end;
  border-bottom-right-radius: 3px;
  font-style: italic;
}

/* ── Option buttons ── */
#fd-interaction {
  flex-shrink: 0;
}

.fd-options {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.fd-option {
  background: #161b22;
  border: 1px solid #30363d;
  color: #c9d1d9;
  padding: 10px 15px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  line-height: 1.45;
  transition: border-color 0.13s, background 0.13s, color 0.13s;
}

.fd-option:hover,
.fd-option:focus-visible {
  border-color: #6e40c9;
  background: #1a1330;
  color: #e6edf3;
  outline: none;
}

.fd-option:focus-visible {
  outline: 2px solid #6e40c9;
  outline-offset: 2px;
}

.fd-option:disabled {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

/* ── Lane result cards ── */
.fd-cards {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.fd-card {
  background: #161b22;
  border: 1px solid #30363d;
  border-left: 3px solid #6e40c9;
  border-radius: 0 8px 8px 0;
  padding: 13px 15px;
  cursor: pointer;
  transition: border-color 0.13s, background 0.13s;
}

.fd-card:hover,
.fd-card:focus-visible {
  border-color: #9b7fd4;
  border-left-color: #b392f0;
  background: #1a1330;
  outline: none;
}

.fd-card:focus-visible {
  outline: 2px solid #6e40c9;
  outline-offset: 2px;
}

.fd-card-inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.fd-card-type {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #b392f0;
}

.fd-card-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: #e6edf3;
  margin: 0;
  line-height: 1.3;
}

.fd-card-summary {
  font-size: 0.79rem;
  color: #8b949e;
  margin: 0;
  line-height: 1.5;
}

.fd-card-lens {
  font-size: 0.77rem;
  color: #b392f0;
  font-style: italic;
  margin: 3px 0 0;
  line-height: 1.4;
}

/* ── Lane buckets ── */
.fd-bucket {
  margin-bottom: 18px;
}

.fd-bucket + .fd-bucket {
  border-top: 1px solid #21262d;
  padding-top: 14px;
}

.fd-bucket-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #6e40c9;
  margin: 0 0 3px;
}

.fd-bucket-frame {
  font-size: 0.75rem;
  color: #484f58;
  font-style: italic;
  margin: 0 0 10px;
  line-height: 1.4;
}

/* ── Restart ── */
.fd-restart {
  margin-top: 10px;
  text-align: center;
}

.fd-restart-btn {
  background: transparent;
  border: none;
  color: #484f58;
  font-size: 0.72rem;
  font-family: inherit;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.13s;
}

.fd-restart-btn:hover,
.fd-restart-btn:focus-visible {
  color: #8b949e;
  outline: 2px solid #30363d;
  outline-offset: 2px;
}

/* ── Lane footer controls ── */
.fd-lane-controls {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.fd-back-btn {
  background: transparent;
  border: 1px solid #30363d;
  color: #8b949e;
  padding: 6px 13px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.13s, color 0.13s;
}

.fd-back-btn:hover,
.fd-back-btn:focus-visible {
  border-color: #6e40c9;
  color: #c9d1d9;
  outline: 2px solid #6e40c9;
  outline-offset: 2px;
}

/* ── Docked tab (shown when overlay is collapsed) ── */
#fd-tab {
  position: fixed;
  right: 20px;
  bottom: 28px;
  z-index: 1059;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px 9px 10px;
  background: #010409;
  border: 1px solid #6e40c9;
  border-radius: 24px;
  box-shadow:
    0 0 0 1px rgba(110, 64, 201, 0.25),
    0 8px 24px rgba(0, 0, 0, 0.55);
  cursor: pointer;
  font-family: inherit;
  /* Hidden by default (overlay is open) */
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, border-color 0.15s, box-shadow 0.15s;
}

#fd-tab.fd-tab-visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

#fd-tab.fd-no-transition {
  transition: none;
}

#fd-tab:hover,
#fd-tab:focus-visible {
  border-color: #b392f0;
  box-shadow:
    0 0 0 1px rgba(179, 146, 240, 0.4),
    0 8px 28px rgba(0, 0, 0, 0.6);
  outline: none;
}

#fd-tab:focus-visible {
  outline: 2px solid #b392f0;
  outline-offset: 3px;
}

#fd-tab-avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6e40c9 0%, #b392f0 100%);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  user-select: none;
}

#fd-tab-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: #e6edf3;
  white-space: nowrap;
}

/* ── Mobile ── */
@media (max-width: 520px) {
  #fd-overlay {
    padding: 0;
    align-items: flex-end;
  }

  #fd-panel {
    max-width: 100%;
    max-height: 88vh;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
  }

  #fd-header {
    border-radius: 12px 12px 0 0;
  }

  .fd-persistent-btn {
    font-size: 0.68rem;
    padding: 4px 9px;
  }

  .fd-bubble {
    max-width: 92%;
    font-size: 0.84rem;
  }

  #fd-tab {
    right: 12px;
    bottom: 16px;
    padding: 8px 12px 8px 9px;
  }

  #fd-tab-label {
    font-size: 0.73rem;
  }
}