.side-dt {
  --side-dt-ink: #1b2d55;
  --side-dt-muted: #68799b;
  --side-dt-line: rgba(94, 120, 170, 0.22);
  --side-dt-blue: #486ad5;
  --side-dt-blue-dark: #2f4fad;
  --side-dt-panel: rgba(255, 255, 255, 0.94);
  font-family: "Aptos", "Segoe UI", sans-serif;
  position: fixed;
  inset: 0;
  z-index: 1100;
  color: var(--side-dt-ink);
  pointer-events: none;
  touch-action: none;
}

.side-dt-fab {
  position: fixed;
  left: var(--side-dt-fab-left, calc(100vw - 108px));
  top: var(--side-dt-fab-top, calc(100vh - 108px));
  display: grid;
  place-items: center;
  width: 84px;
  height: 84px;
  border: 0;
  border-radius: 50%;
  padding: 0;
  background: linear-gradient(135deg, #3d63d8, #5d7ce0);
  box-shadow: 0 22px 46px rgba(48, 74, 150, 0.32);
  color: #fff;
  cursor: pointer;
  pointer-events: auto;
  font-weight: 900;
  letter-spacing: 0.04em;
  isolation: isolate;
  user-select: none;
  touch-action: none;
  transition: opacity 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.side-dt.is-moving .side-dt-fab {
  box-shadow: 0 28px 58px rgba(48, 74, 150, 0.42);
  transform: scale(1.04);
}

.side-dt-fab::before {
  content: "";
  position: absolute;
  inset: 15px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.42);
}

.side-dt-fab-icon {
  display: grid;
  place-items: center;
  width: 43px;
  height: 43px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.95rem;
  line-height: 1;
}

.side-dt.is-open .side-dt-fab {
  left: var(--side-dt-fab-left, 24px);
  top: var(--side-dt-fab-top, 24px);
  z-index: 5;
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.side-dt-drawer {
  display: flex;
  flex-direction: column;
  position: fixed;
  left: var(--side-dt-drawer-left, calc(100vw - 464px));
  top: var(--side-dt-drawer-top, 24px);
  width: min(440px, calc(100vw - 32px));
  height: calc(100vh - 48px);
  max-height: calc(100vh - 48px);
  border: 1px solid var(--side-dt-line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 14% 0%, rgba(91, 126, 220, 0.16), transparent 34%),
    var(--side-dt-panel);
  box-shadow: 0 24px 70px rgba(23, 39, 77, 0.22);
  backdrop-filter: blur(18px);
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: none;
  transition: opacity 0.18s ease;
}

.side-dt.is-open .side-dt-drawer {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.side-dt-drag {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 66px;
  height: 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: move;
  transform: translateX(-50%);
  z-index: 3;
  touch-action: none;
}

.side-dt-drag::before {
  content: "";
  display: block;
  width: 56px;
  height: 5px;
  margin: 4px auto;
  border-radius: 999px;
  background: rgba(96, 122, 176, 0.32);
}

.side-dt.is-dragging .side-dt-drawer,
.side-dt.is-resizing .side-dt-drawer {
  transition: none;
  user-select: none;
}

.side-dt-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 28px 22px 16px;
  border-bottom: 1px solid var(--side-dt-line);
  background: transparent;
}

.side-dt-resize {
  position: absolute;
  z-index: 4;
  border: 0;
  background: transparent;
  padding: 0;
  touch-action: none;
}

.side-dt-resize-w,
.side-dt-resize-e {
  top: 22px;
  bottom: 22px;
  width: 14px;
  cursor: ew-resize;
}

.side-dt-resize-w {
  left: 0;
}

.side-dt-resize-e {
  right: 0;
}

.side-dt-resize-s {
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 14px;
  cursor: ns-resize;
}

.side-dt-resize-nw,
.side-dt-resize-ne,
.side-dt-resize-sw,
.side-dt-resize-se {
  width: 22px;
  height: 22px;
}

.side-dt-resize-nw {
  top: 0;
  left: 0;
  cursor: nwse-resize;
}

.side-dt-resize-ne {
  top: 0;
  right: 0;
  cursor: nesw-resize;
}

.side-dt-resize-sw {
  bottom: 0;
  left: 0;
  cursor: nesw-resize;
}

.side-dt-resize-se {
  right: 0;
  bottom: 0;
  cursor: nwse-resize;
}

.side-dt-head h2 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.1;
  color: var(--side-dt-ink);
}

.side-dt-head p {
  margin: 8px 0 0;
  color: var(--side-dt-muted);
  font-size: 0.96rem;
  font-weight: 700;
}

.side-dt-close {
  border: 1px solid rgba(76, 103, 168, 0.22);
  border-radius: 12px;
  background: #fff;
  color: var(--side-dt-blue-dark);
  cursor: pointer;
  font-weight: 800;
}

.side-dt-close {
  padding: 8px 12px;
}

.side-dt-minimize {
  display: grid;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--side-dt-blue-dark);
  place-items: center;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  z-index: 5;
}

.side-dt-minimize:hover {
  color: var(--side-dt-blue);
}

.side-dt-minimize:focus-visible {
  outline: 2px solid var(--side-dt-blue);
  outline-offset: 2px;
}

.side-dt-messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px;
  scroll-behavior: smooth;
}

.side-dt-message {
  max-width: 92%;
  margin: 0 0 14px;
  border-radius: 18px;
  padding: 13px 15px;
  font-size: 1.04rem;
  line-height: 1.56;
}

.side-dt-message-user {
  margin-left: auto;
  background: linear-gradient(135deg, #4266d8, #5e7ee5);
  color: #fff;
  border-bottom-right-radius: 8px;
}

.side-dt-message-answer {
  background: #fff;
  border: 1px solid var(--side-dt-line);
  color: #263657;
  box-shadow: 0 10px 24px rgba(53, 75, 119, 0.08);
}

.side-dt-message-error {
  background: #fff5f5;
  border: 1px solid rgba(220, 38, 38, 0.22);
  color: #9f1d1d;
}

.side-dt-message-answer :first-child {
  margin-top: 0;
}

.side-dt-message-answer :last-child {
  margin-bottom: 0;
}

.side-dt-message-answer a {
  color: var(--side-dt-blue-dark);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.side-dt-message-answer ul,
.side-dt-message-answer ol {
  margin: 0.45rem 0 0.45rem 1.05rem;
  padding-left: 0.8rem;
}

.side-dt-message-answer li {
  padding-left: 0.1rem;
  margin: 0.24rem 0;
}

.side-dt-inline-citation {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.28em;
  height: 1.28em;
  border-radius: 999px;
  background: rgba(72, 106, 213, 0.14);
  color: var(--side-dt-blue-dark);
  font-size: 0.76em;
  font-weight: 900;
  text-decoration: none;
}

.side-dt-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 16px;
  border-top: 1px solid var(--side-dt-line);
  background: rgba(248, 251, 255, 0.92);
}

.side-dt-form textarea {
  min-height: 86px;
  max-height: 180px;
  resize: vertical;
  border: 1px solid rgba(94, 120, 170, 0.24);
  border-radius: 16px;
  padding: 12px 14px;
  color: var(--side-dt-ink);
  font: inherit;
  background: #fff;
}

.side-dt-form textarea:focus {
  outline: none;
  border-color: rgba(72, 106, 213, 0.6);
  box-shadow: 0 0 0 4px rgba(72, 106, 213, 0.12);
}

.side-dt-form button {
  align-self: end;
  border: 0;
  border-radius: 15px;
  padding: 0 18px;
  min-height: 54px;
  background: linear-gradient(135deg, #3d63d8, #5d7ce0);
  color: #fff;
  cursor: pointer;
  font-weight: 900;
}

.side-dt.is-busy .side-dt-form button {
  cursor: wait;
  opacity: 0.72;
}

.deepthink-progress {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
  padding: 9px;
  border: 1px solid rgba(94, 120, 170, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
}

.deepthink-progress[hidden] {
  display: none;
}

.deepthink-progress-stage {
  display: grid;
  justify-items: center;
  gap: 4px;
  min-width: 0;
  color: #71809b;
  font-size: 0.68rem;
  text-align: center;
}

.deepthink-progress-number {
  position: relative;
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid rgba(94, 120, 170, 0.26);
  border-radius: 50%;
  background: #fff;
  font-weight: 800;
}

.deepthink-progress-stage.is-done,
.deepthink-progress-stage.is-active {
  color: #3154bd;
}

.deepthink-progress-stage.is-active .deepthink-progress-number {
  border-color: #486ad5;
  background: #fff;
  color: #3154bd;
}

.deepthink-progress-stage.is-active .deepthink-progress-number::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 2px solid transparent;
  border-top-color: #5b74d8;
  border-right-color: rgba(91, 116, 216, 0.35);
  border-radius: 50%;
  animation: deepthinkStageSpin 1s linear infinite;
}

.deepthink-progress-stage.is-failed {
  color: #b83d55;
}

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

@media (max-width: 640px) {
  .side-dt {
    inset: 0;
  }

  .side-dt.is-positioned {
    right: auto;
    bottom: auto;
  }

  .side-dt-drawer {
    width: min(100%, calc(100vw - 24px));
    height: calc(100vh - 24px);
    border-radius: 20px;
  }
}