#app .search-view.active {
  display: flex;
  flex-direction: column;
}

.search-view {
  overflow: hidden;
  background: var(--bg);
}

.solver-header {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: calc(20px + env(safe-area-inset-top)) 20px 14px;
  border-bottom: 1px solid transparent;
  background: rgba(255, 255, 255, 0.96);
  z-index: 2;
}

.solver-header > div:first-child { flex: 1 1 auto; min-width: 0; }

.solver-session-switch {
  max-width: min(72vw, 560px);
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: inherit;
  font-size: 27px;
  font-weight: 400;
  line-height: 1.2;
  text-align: left;
  cursor: pointer;
}

.solver-session-switch span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.solver-session-switch .lucide {
  flex: 0 0 auto;
  width: 21px;
  height: 21px;
  color: var(--muted);
}

.solver-session-switch .lucide:last-child { width: 18px; height: 18px; }

.solver-settings-button {
  position: relative;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
}

.solver-settings-dot {
  position: absolute;
  top: 7px;
  right: 7px;
  width: 7px;
  height: 7px;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: var(--red);
}

.solver-settings-dot.configured { display: none; }

.solver-workspace {
  overflow-anchor: none;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  scrollbar-width: none;
}

.solver-workspace::-webkit-scrollbar { display: none; }

.solver-welcome {
  width: 100%;
  max-width: 560px;
  margin: auto;
  padding: 42px 28px 54px;
  text-align: center;
  animation: solver-rise 340ms ease-out both;
}

.solver-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin: 0 auto 20px;
  color: var(--red);
}

.solver-mark .lucide {
  width: 38px;
  height: 38px;
  stroke-width: 1.6;
}

.solver-welcome h2 {
  max-width: 390px;
  margin: 0 auto;
  font-family: "Songti SC", "STSong", "SimSun", Georgia, serif;
  font-size: 34px;
  font-weight: 400;
  line-height: 1.28;
}

.solver-welcome p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.solver-messages {
  width: 100%;
  padding: 18px 20px 38px;
}

.solver-messages[hidden] { display: none; }

.solver-message {
  display: flex;
  flex-direction: column;
  margin-bottom: 24px;
  animation: solver-rise 220ms ease-out both;
}

.solver-message.user { align-items: flex-end; }
.solver-message.assistant { align-items: flex-start; }

.solver-message-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 120px));
  gap: 7px;
  justify-content: end;
  margin-bottom: 8px;
}

.solver-message-images img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.solver-user-copy {
  max-width: 88%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px 8px 2px 8px;
  background: var(--surface);
  font-size: 16px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.solver-assistant-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 9px;
  color: var(--red);
  font-size: 13px;
}

.solver-assistant-heading .lucide { width: 17px; height: 17px; }

.solver-assistant-copy {
  width: 100%;
  font-family: "Songti SC", "STSong", "SimSun", Georgia, serif;
  font-size: 17px;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.solver-markdown > :first-child { margin-top: 0; }
.solver-markdown > :last-child { margin-bottom: 0; }
.solver-markdown p { margin: 0 0 0.9em; }
.solver-markdown h1,
.solver-markdown h2,
.solver-markdown h3,
.solver-markdown h4 {
  margin: 1.25em 0 0.55em;
  font-family: inherit;
  font-weight: 600;
  line-height: 1.45;
}
.solver-markdown h1 { font-size: 22px; }
.solver-markdown h2 { font-size: 20px; }
.solver-markdown h3 { font-size: 18px; }
.solver-markdown h4 { font-size: 17px; }
.solver-markdown strong { font-weight: 600; }
.solver-markdown ul,
.solver-markdown ol { margin: 0 0 1em; padding-left: 1.45em; }
.solver-markdown li + li { margin-top: 0.35em; }
.solver-markdown blockquote {
  margin: 1em 0;
  padding: 2px 0 2px 13px;
  border-left: 3px solid var(--red);
  color: var(--muted);
}
.solver-markdown pre {
  margin: 1em 0;
  padding: 13px 14px;
  overflow-x: auto;
  border-radius: 5px;
  background: #151919;
  color: #f4f7f6;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  line-height: 1.65;
}
.solver-markdown code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  letter-spacing: 0;
}
.solver-markdown :not(pre) > code {
  padding: 2px 5px;
  border-radius: 3px;
  background: var(--surface);
  color: var(--red);
  font-size: 0.88em;
}
.solver-markdown a { color: var(--blue); text-underline-offset: 3px; }
.solver-markdown hr { margin: 1.2em 0; border: 0; border-top: 1px solid var(--line); }
.solver-markdown table {
  display: block;
  width: 100%;
  margin: 1em 0;
  overflow-x: auto;
  border-collapse: collapse;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.solver-markdown th,
.solver-markdown td { padding: 8px 10px; border: 1px solid var(--line); text-align: left; }
.solver-markdown th { background: var(--surface); font-weight: 600; }
.solver-markdown img { max-width: 100%; height: auto; }

.solver-reasoning {
  width: 100%;
  margin: 0 0 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.solver-reasoning[hidden] { display: none; }

.solver-reasoning summary {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 11px;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  cursor: pointer;
  list-style: none;
}

.solver-reasoning summary::-webkit-details-marker { display: none; }
.solver-reasoning summary .lucide { width: 16px; height: 16px; color: var(--red); }
.solver-reasoning-title { color: var(--ink); }
.solver-reasoning-time { margin-left: auto; }
.solver-reasoning-chevron { transition: transform 160ms ease; }
.solver-reasoning[open] .solver-reasoning-chevron { transform: rotate(180deg); }
.solver-reasoning-copy {
  padding: 0 12px 13px;
  color: #5d6664;
  font-family: "Songti SC", "STSong", "SimSun", Georgia, serif;
  font-size: 14px;
  line-height: 1.75;
}

.solver-message.error .solver-assistant-copy { color: var(--red); }

.solver-stream-cursor::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 3px;
  vertical-align: -0.12em;
  background: currentColor;
  animation: solver-blink 850ms steps(1) infinite;
}

.solver-message-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  margin-top: 9px;
  color: var(--muted);
  font-size: 12px;
}

.solver-copy-button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.solver-copy-button .lucide { width: 17px; height: 17px; }

.solver-composer {
  flex: 0 0 auto;
  width: calc(100% - 40px);
  max-width: 720px;
  margin: 10px auto 2px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  box-shadow: 0 8px 24px rgba(20, 28, 28, 0.07);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.solver-composer:focus-within {
  border-color: #aeb7b5;
  box-shadow: 0 10px 28px rgba(20, 28, 28, 0.1);
}

.solver-composer textarea {
  display: block;
  width: 100%;
  min-height: 54px;
  max-height: 144px;
  resize: none;
  padding: 3px 5px 9px;
  overflow-y: auto;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  line-height: 1.6;
}

.solver-composer textarea::placeholder { color: #909796; }

.solver-question-type {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 10px;
  border-bottom: 1px solid #e4e8e7;
}
.solver-question-type label {
  flex: none;
  font-size: 16px;
  font-weight: 400;
  color: #58615e;
}
.solver-question-type select {
  flex: 1;
  min-width: 0;
  width: 100%;
  min-height: 44px;
  padding: 8px;
  border: 1px solid #dce2df;
  border-radius: 4px;
  background: #fff;
  color: #202622;
  font: inherit;
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0;
}
.solver-question-type select:focus-visible {
  outline: 2px solid #b92323;
  outline-offset: 2px;
}
.solver-question-type select:disabled { opacity: .6; }

.solver-image-preview {
  display: flex;
  gap: 9px;
  margin-bottom: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.solver-image-preview::-webkit-scrollbar { display: none; }
.solver-image-preview[hidden] { display: none; }

.solver-preview-item {
  position: relative;
  flex: 0 0 74px;
  width: 74px;
  height: 74px;
}

.solver-preview-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.solver-preview-remove {
  position: absolute;
  top: -5px;
  right: -5px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
}

.solver-preview-remove .lucide { width: 14px; height: 14px; }
.solver-preview-crop {
  position: absolute; bottom: 0; left: 0; width: 36px; height: 36px;
  display: grid; place-items: center; border: 0; border-radius: 4px;
  background: #fff; color: #222; cursor: pointer;
}
.solver-preview-crop .lucide { width: 20px; height: 20px; }
.solver-crop-dialog {
  margin: auto; width: min(720px, calc(100% - 24px)); max-height: calc(100dvh - 24px);
  padding: 16px; border: 1px solid #ddd; border-radius: 8px; background: #fff; color: #222;
  font-family: inherit; overflow-y: auto;
}
.solver-crop-dialog::backdrop { background: #000b; }
.solver-crop-dialog header, .solver-crop-dialog footer, .solver-crop-tools { display: flex; align-items: center; gap: 12px; }
.solver-crop-dialog header { justify-content: space-between; margin-bottom: 12px; }
.solver-crop-dialog h2 { font-size: 22px; font-weight: 400; }
.solver-crop-dialog button { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; background: #fff; color: #222; font: inherit; font-size: 17px; cursor: pointer; }
.solver-crop-dialog button:disabled { opacity: .5; }
.solver-crop-dialog button:focus-visible { outline: 2px solid #bb2424; outline-offset: 2px; }
.solver-crop-stage { height: min(52dvh, 480px); min-height: 120px; background: #171717; overflow: hidden; }
.solver-crop-stage > img { display: block; max-width: 100%; }
.solver-crop-tools { justify-content: center; margin-top: 12px; }
.solver-crop-dialog footer { justify-content: flex-end; }
.solver-crop-dialog [data-action="confirm"] { background: #bb2424; border-color: #bb2424; color: #fff; }
.solver-crop-error { margin: 8px 0; color: #bb2424; font-size: 15px; }
.solver-crop-dialog .cropper-point { width: 12px; height: 12px; opacity: 1; }

.solver-composer-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
}

.solver-media-actions { display: flex; align-items: center; gap: 5px; }

.solver-icon-button,
.solver-send-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 5px;
  cursor: pointer;
}

.solver-icon-button {
  border: 0;
  background: transparent;
  color: var(--muted);
}

.solver-icon-button:hover { background: var(--surface); color: var(--ink); }

.solver-send-button {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
}

.solver-send-button:disabled { opacity: 0.38; cursor: default; }
.solver-send-button.stop { border-color: var(--red); background: var(--red); }

.solver-status {
  margin: 9px 4px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.solver-status.error { color: var(--red); }
.solver-status[hidden] { display: none; }

.solver-settings-modal[hidden] { display: none; }

.solver-settings-modal {
  position: absolute;
  inset: 0;
  z-index: 420;
  display: grid;
  align-items: end;
}

.solver-settings-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 20, 0.44);
}

.solver-settings-dialog {
  position: relative;
  z-index: 1;
  width: 100%;
  max-height: 92%;
  padding: 20px 20px calc(22px + env(safe-area-inset-bottom));
  overflow-y: auto;
  border-radius: 8px 8px 0 0;
  background: var(--bg);
}

.solver-settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.solver-settings-header h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 500;
}

.solver-settings-header .icon-button {
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
}

.solver-settings-dialog form {
  display: grid;
  gap: 15px;
  margin-top: 22px;
}

.solver-settings-field {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 14px;
}

.solver-settings-field[hidden] { display: none; }

.solver-settings-field input,
.solver-settings-field select {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}

.solver-secret-field {
  position: relative;
  display: block;
}

.solver-secret-field input { padding-right: 50px; }

.solver-secret-field button {
  position: absolute;
  top: 4px;
  right: 4px;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.solver-settings-note {
  margin: -7px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.solver-settings-note a { color: var(--blue); text-decoration: none; }
.solver-settings-note code { color: var(--ink); font-family: "SFMono-Regular", Consolas, monospace; font-size: 0.92em; }

.solver-settings-status {
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.solver-settings-status.error { color: var(--red); }
.solver-settings-status.success { color: var(--green); }

.solver-settings-actions {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 10px;
}

.solver-settings-actions button {
  min-height: 48px;
  border-radius: 5px;
  font-size: 15px;
  cursor: pointer;
}

.solver-test-button { border: 1px solid var(--line); background: var(--surface); }
.solver-save-button { border: 1px solid var(--ink); background: var(--ink); color: #fff; }

.solver-clear-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--red);
  font-size: 14px;
  cursor: pointer;
}

.solver-clear-button .lucide { width: 17px; height: 17px; }

.solver-sessions-modal[hidden] { display: none; }

.solver-sessions-modal {
  position: absolute;
  inset: 0;
  z-index: 415;
  display: grid;
  align-items: end;
}

.solver-sessions-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 20, 0.44);
}

.solver-sessions-dialog {
  position: relative;
  z-index: 1;
  width: 100%;
  max-height: 82%;
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
  overflow-y: auto;
  border-radius: 8px 8px 0 0;
  background: var(--bg);
}

.solver-sessions-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.solver-sessions-header h2 { margin: 0; font-size: 24px; font-weight: 500; }
.solver-sessions-header .icon-button { width: 42px; height: 42px; border: 0; background: transparent; }

.solver-new-session {
  width: 100%;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 20px 0 10px;
  border: 1px solid var(--ink);
  border-radius: 5px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}

.solver-new-session .lucide { width: 18px; height: 18px; }
.solver-session-list { display: grid; }

.solver-session-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 70px;
  border-bottom: 1px solid var(--line);
}

.solver-session-row.current { box-shadow: inset 3px 0 0 var(--red); }

.solver-session-main {
  min-width: 0;
  display: grid;
  gap: 5px;
  padding: 12px 10px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.solver-session-title {
  overflow: hidden;
  color: var(--ink);
  font-size: 15px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.solver-session-meta { color: var(--muted); font-size: 12px; }
.solver-session-actions { display: flex; align-items: center; }
.solver-session-action {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.solver-session-action.delete { color: var(--red); }
.solver-session-action .lucide { width: 16px; height: 16px; }

.solver-session-rename-form {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 40px 40px;
  align-items: center;
  gap: 4px;
  padding: 10px;
}

.solver-session-rename-form input {
  width: 100%;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 15px;
}

.solver-session-rename-form button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.solver-session-rename-form button[type="submit"] { color: var(--green); }
.solver-session-rename-form .lucide { width: 17px; height: 17px; }

@keyframes solver-rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes solver-blink {
  0%, 48% { opacity: 1; }
  49%, 100% { opacity: 0; }
}

@media (max-width: 360px) {
  .solver-header { padding-left: 16px; padding-right: 16px; }
  .solver-welcome { padding-left: 20px; padding-right: 20px; }
  .solver-welcome h2 { font-size: 30px; }
  .solver-messages { padding-left: 16px; padding-right: 16px; }
  .solver-composer { width: calc(100% - 24px); padding: 12px; }
}

@media (min-width: 600px) {
  .solver-header { padding-left: 28px; padding-right: 28px; }
  .solver-messages { padding-left: 28px; padding-right: 28px; }
  .solver-composer { width: calc(100% - 56px); }
  .solver-settings-dialog {
    max-width: 560px;
    margin: 0 auto 22px;
    padding: 24px 28px 26px;
    border-radius: 8px;
  }
  .solver-sessions-dialog {
    max-width: 560px;
    margin: 0 auto 22px;
    padding: 24px 28px 26px;
    border-radius: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .solver-welcome,
  .solver-message,
  .solver-stream-cursor::after { animation: none; }
}