:root {
  --bg: #fcfaf7;
  --panel: #fffefc;
  --panel-2: #fbf8f4;
  --line: #ece6ef;
  --text: #4c4857;
  --muted: #9891a7;
  --accent: #9e8fb5;
  --accent-2: #beb2cf;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1000px 520px at 6% -10%, #f1edf888, transparent 58%),
    radial-gradient(900px 520px at 95% 0%, #f6f0f888, transparent 60%),
    var(--bg);
  font-family: "Inter", "SF Pro Text", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  height: 100vh;
  overflow: hidden;
  animation: pageFadeIn 0.5s ease-out;
}

.app {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  height: 100vh;
  gap: 14px;
  padding: 14px;
}

.sidebar, .main {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border-radius: 10px;
  box-shadow: 0 5px 14px rgba(84, 79, 113, 0.06);
  animation: panelRiseIn 0.45s ease-out both;
}

.sidebar {
  padding: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 14px;
}

.brand h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.cat-icon {
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  margin-right: -2px;
  transition: transform 0.25s ease;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.cat-icon svg {
  width: 60px;
  height: 60px;
}

.cat-icon:hover {
  transform: scale(1.03) rotate(-2deg);
}

.cat-icon:hover .cat-bounce {
  animation: catHoverBop 1.2s ease-in-out infinite;
}

.cat-icon:hover .cat-eye {
  transform: scaleY(0.42) translateY(0.8px);
}

.cat-icon:hover .cat-mouth {
  opacity: 0;
  transform: translateY(0.4px) scaleX(0.94);
}

.cat-icon:hover .cat-mouth-smile {
  opacity: 0;
  transform: translateY(0.2px) scaleX(0.95);
}

.cat-icon:hover .cat-mouth-open,
.cat-icon:hover .cat-tongue {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.cat-icon:hover .cat-blush {
  transform: scale(1.12);
  opacity: 0.95;
}

.cat-icon::after {
  content: "喵~";
  position: absolute;
  top: -8px;
  right: -2px;
  padding: 2px 8px;
  font-size: 11px;
  color: #6f6290;
  background: #fff;
  border: 1px solid #d8cfee;
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(130, 110, 170, 0.16);
  opacity: 0;
  transform: translateY(4px) scale(0.92);
  pointer-events: none;
}

.cat-bg {
  display: none;
}

.cat-bounce {
  transform-origin: center bottom;
  animation: catBounce 4.2s ease-in-out infinite;
}

.cat-ear {
  fill: #fef9f3;
  stroke: #8f7ca6;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.cat-ear-left {
  transform-origin: 24px 22px;
  animation: earLeft 4.6s ease-in-out infinite;
}

.cat-ear-right {
  transform-origin: 40px 22px;
  animation: earRight 4.6s ease-in-out infinite;
}

.cat-head {
  fill: #fffdf9;
  stroke: #8f7ca6;
  stroke-width: 1.8;
}

.cat-eye {
  fill: #7f6d99;
  transform-origin: center;
  animation: catBlink 5.2s ease-in-out infinite;
  transition: transform 0.2s ease;
}

.cat-eye-highlight {
  fill: #fff;
}

.cat-nose {
  fill: #b788a8;
}

.cat-mouth {
  fill: none;
  stroke: #8f7ca6;
  stroke-width: 1.5;
  stroke-linecap: round;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.cat-mouth-smile {
  fill: none;
  stroke: #8f7ca6;
  stroke-width: 1.7;
  stroke-linecap: round;
  opacity: 0;
  transform-origin: center;
  transform: translateY(0.4px) scaleX(0.92);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.cat-mouth-open {
  fill: #8669a8;
  opacity: 0;
  transform-origin: center;
  transform: translateY(0.2px) scale(0.88);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.cat-tongue {
  fill: #f1b4cc;
  opacity: 0;
  transform-origin: center;
  transform: translateY(0.25px) scale(0.86);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.cat-blush {
  fill: #ecdff7;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.cat-icon.is-smiling .cat-bounce {
  animation: catSmileBounce 0.9s ease-out 1;
}

.cat-icon.is-smiling .cat-eye {
  transform: scaleY(0.42) translateY(0.8px);
}

.cat-icon.is-smiling .cat-mouth {
  opacity: 0;
  transform: translateY(0.4px) scaleX(0.94);
}

.cat-icon.is-smiling .cat-mouth-smile {
  opacity: 0;
  transform: translateY(0.2px) scaleX(0.95);
}

.cat-icon.is-smiling .cat-mouth-open,
.cat-icon.is-smiling .cat-tongue {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.cat-icon.is-smiling .cat-blush {
  transform: scale(1.12);
  opacity: 0.95;
}

.cat-icon.is-speaking::after {
  animation: meowPop 0.9s ease-out 1;
}

.cat-icon:hover::after {
  opacity: 1;
  transform: translateY(-4px) scale(1);
}

.session-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: calc(100vh - 170px);
  overflow: auto;
}

.session-item {
  border: 1px solid #e6e1eb;
  background: #fffefc;
  color: var(--text);
  border-radius: 8px;
  padding: 9px 10px;
  cursor: pointer;
  font-size: 13px;
  text-align: left;
  transition: border-color 0.15s ease, transform 0.15s ease, background-color 0.15s ease;
}

.session-item:hover {
  transform: translateY(-1px);
  border-color: #cdc6df;
}

.session-item.active {
  border-color: var(--accent);
  background: #f7f4fb;
}

.main {
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
  min-height: 0;
}

.hero {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 2;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  text-align: center;
}

.hero h2 {
  margin: 0;
  font-size: 23px;
  letter-spacing: 0.2px;
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.title-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  animation: titleBreath 4.8s ease-in-out infinite;
}

.title-with-cat {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.title-brand {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.title-sub {
  font-family: "Inter", "SF Pro Text", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
  line-height: 1.2;
  color: #9f95b0;
  font-weight: 600;
}

.title-cat {
  width: 64px;
  height: 48px;
  display: inline-grid;
  place-items: center;
  margin-right: 2px;
  cursor: pointer;
}

.title-cat svg {
  width: 100%;
  height: 100%;
  display: block;
}

.title-cat.is-running {
  animation: titleCatRunShift 0.3s ease-in-out 7;
}

.title-cat.is-running .title-body,
.title-cat.is-running .title-head-group,
.title-cat.is-running .title-head,
.title-cat.is-running .title-ear,
.title-cat.is-running .title-ear-inner,
.title-cat.is-running .title-eye,
.title-cat.is-running .title-eye-highlight,
.title-cat.is-running .title-nose,
.title-cat.is-running .title-mouth,
.title-cat.is-running .title-cheek,
.title-cat.is-running .title-belly {
  animation: titleCatRunBounce 0.24s ease-in-out 8;
}

.title-cat.is-running .title-tail {
  animation: titleTailRunWag 0.18s ease-in-out 12;
}

.title-cat.is-running .title-paw-left {
  animation: titlePawRunLeft 0.14s linear 15;
}

.title-cat.is-running .title-paw-right {
  animation: titlePawRunRight 0.14s linear 15;
}

.title-cat.is-running .title-dust-left {
  animation: titleDustKickLeft 0.2s ease-out 10;
}

.title-cat.is-running .title-dust-right {
  animation: titleDustKickRight 0.2s ease-out 10;
}

.title-tail {
  fill: none;
  stroke: #8a7d98;
  stroke-width: 3.9;
  stroke-linecap: round;
  transform-origin: left center;
  transform-box: fill-box;
}

.title-head-group {
  transform-origin: 32px 28px;
  transform-box: fill-box;
  transform: rotate(-12deg);
}

.title-cat:hover .title-tail {
  animation: titleTailWag 0.45s ease-in-out infinite;
}

.title-body {
  fill: #fffefb;
  stroke: #8a7d98;
  stroke-width: 1.55;
}

.title-head {
  fill: #fffefb;
  stroke: #8a7d98;
  stroke-width: 1.55;
}

.title-ear {
  fill: #fdf8f2;
  stroke: #8a7d98;
  stroke-width: 1.35;
  stroke-linejoin: round;
}

.title-ear-inner {
  fill: #e8d7ea;
}

.title-belly {
  fill: #f4eef7;
}

.title-eye {
  fill: #756884;
  transform-origin: center;
  animation: titleCatBlink 5.2s ease-in-out infinite;
}

.title-eye-highlight {
  fill: #fff;
}

.title-nose {
  fill: #b59db9;
}

.title-mouth {
  fill: none;
  stroke: #8a7d98;
  stroke-width: 1.05;
  stroke-linecap: round;
}

.title-cheek {
  fill: #ede4f1;
}

.title-paw {
  fill: #f7effa;
  stroke: #8b73a8;
  stroke-width: 1.1;
}

.title-paw-left {
  transform-origin: 45px 50px;
  transform-box: fill-box;
}

.title-paw-right {
  transform-origin: 55px 50px;
  transform-box: fill-box;
}

.title-dust {
  fill: none;
  stroke: #b8adca;
  stroke-width: 1.6;
  stroke-linecap: round;
  opacity: 0;
  transform-box: fill-box;
}

.title-dust-left {
  transform-origin: 39px 53px;
}

.title-dust-right {
  transform-origin: 59px 53px;
}

.paw {
  font-size: 18px;
  vertical-align: middle;
  color: #f0a4c3;
  filter: drop-shadow(0 1px 0 rgba(255, 255, 255, 0.6));
}

.chat {
  overflow: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
}

.message {
  max-width: 85%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #e3dfeb;
  line-height: 1.65;
  white-space: pre-wrap;
  font-size: 14px;
  animation: messageIn 0.22s ease-out;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.message:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(120, 98, 164, 0.08);
}

.message .content p {
  margin: 0 0 8px 0;
}

.message .content p:last-child {
  margin-bottom: 0;
}

.msg-gap {
  height: 8px;
}

.table-wrap {
  overflow-x: auto;
  margin: 6px 0;
}

.msg-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: #fff;
  border: 1px solid #e3deea;
  border-radius: 8px;
}

.msg-table th,
.msg-table td {
  border: 1px solid #e3deea;
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.msg-table thead th {
  background: #f6f2fb;
  color: #4f4865;
  font-weight: 700;
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(120deg, #e2ddec, #e0d6e8);
  border-color: #cec7df;
  color: #3f3b52;
}

.message.assistant {
  align-self: flex-start;
  background: #fffdfa;
}

.role {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 5px;
  font-weight: 600;
}

.composer {
  border-top: 1px solid var(--line);
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr 110px;
  gap: 10px;
}

.composer-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

textarea {
  background: #fffdfa;
  color: var(--text);
  border: 1px solid #e3deea;
  border-radius: 8px;
  min-height: 88px;
  padding: 12px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
  font-size: 14px;
}

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(143, 135, 189, 0.18);
}

textarea::placeholder {
  color: #a39db4;
}

textarea,
.message .content {
  caret-color: var(--accent);
}

.btn {
  border: 1px solid #d9cee8;
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(131, 110, 179, 0.12);
  transition: filter 0.15s ease, transform 0.15s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(120deg, #cfc3e7, #b4a5cf);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -120%;
  width: 70%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transition: left 0.45s ease;
}

.btn-ghost {
  background: linear-gradient(120deg, #fff7fb, #f9f2ff);
  color: var(--text);
  border-color: #e4d7ef;
}

.btn:hover {
  filter: brightness(1.02);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(120, 98, 164, 0.18);
}

.btn-primary:hover::before {
  left: 140%;
}

.btn:disabled {
  opacity: 1;
  color: #fff;
}

.btn:disabled::after {
  content: "▋";
  margin-left: 4px;
  animation: blink 0.9s steps(1, end) infinite;
}

.typing-message .content {
  display: inline-block;
}

.typing-message .content::after {
  content: "▋";
  margin-left: 2px;
  color: var(--accent);
  animation: blink 0.9s steps(1, end) infinite;
}

.chat::-webkit-scrollbar,
.session-list::-webkit-scrollbar {
  width: 9px;
}

.chat::-webkit-scrollbar-thumb,
.session-list::-webkit-scrollbar-thumb {
  background: #ded8ea;
  border-radius: 8px;
}

.chat::-webkit-scrollbar-track,
.session-list::-webkit-scrollbar-track {
  background: transparent;
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

@keyframes pageFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes titleBreath {
  0%, 100% { letter-spacing: 0.35px; }
  50% { letter-spacing: 0.5px; }
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes catBounce {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(-1.2px); }
  60% { transform: translateY(0.4px); }
}

@keyframes catBlink {
  0%, 86%, 100% { transform: scaleY(1); }
  88%, 90% { transform: scaleY(0.1); }
}

@keyframes earLeft {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-6deg); }
}

@keyframes earRight {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(6deg); }
}

@keyframes catSmileBounce {
  0% { transform: translateY(0) scale(1); }
  30% { transform: translateY(-1.5px) scale(1.03); }
  60% { transform: translateY(0.3px) scale(0.995); }
  100% { transform: translateY(0) scale(1); }
}

@keyframes catHoverBop {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-1px) scale(1.02); }
}

@keyframes meowPop {
  0% {
    opacity: 0;
    transform: translateY(4px) scale(0.92);
  }
  18% {
    opacity: 1;
    transform: translateY(-2px) scale(1);
  }
  72% {
    opacity: 1;
    transform: translateY(-4px) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
}

@keyframes titleTailWag {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(12deg); }
  50% { transform: rotate(-8deg); }
  75% { transform: rotate(12deg); }
}

@keyframes titleCatBlink {
  0%, 86%, 100% { transform: scaleY(1); }
  88%, 90% { transform: scaleY(0.12); }
}

@keyframes titleCatRunShift {
  0% { transform: translateX(0) translateY(0) rotate(0deg); }
  20% { transform: translateX(5px) translateY(-1px) rotate(1deg); }
  50% { transform: translateX(-3px) translateY(0.6px) rotate(-1deg); }
  80% { transform: translateX(5px) translateY(-1px) rotate(1deg); }
  100% { transform: translateX(0) translateY(0) rotate(0deg); }
}

@keyframes titleCatRunBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-1.6px); }
}

@keyframes titleTailRunWag {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(20deg); }
  50% { transform: rotate(-14deg); }
  75% { transform: rotate(20deg); }
}

@keyframes titlePawRun {
  0%, 100% { transform: translateY(0) scaleX(1); }
  50% { transform: translateY(1.2px) scaleX(0.95); }
}

@keyframes titlePawRunLeft {
  0%, 100% { transform: translateY(0) translateX(0) rotate(0deg) scaleY(1); }
  35% { transform: translateY(2.2px) translateX(-0.8px) rotate(-16deg) scaleY(0.92); }
  65% { transform: translateY(-1.2px) translateX(0.8px) rotate(8deg) scaleY(1.03); }
}

@keyframes titlePawRunRight {
  0%, 100% { transform: translateY(0) translateX(0) rotate(0deg) scaleY(1); }
  35% { transform: translateY(-1.2px) translateX(0.8px) rotate(8deg) scaleY(1.03); }
  65% { transform: translateY(2.2px) translateX(-0.8px) rotate(-16deg) scaleY(0.92); }
}

@keyframes titleDustKickLeft {
  0% { opacity: 0; transform: translateX(0) translateY(0) scale(0.9); }
  30% { opacity: 0.85; transform: translateX(-1.4px) translateY(-0.5px) scale(1); }
  100% { opacity: 0; transform: translateX(-3.6px) translateY(-1.2px) scale(1.1); }
}

@keyframes titleDustKickRight {
  0% { opacity: 0; transform: translateX(0) translateY(0) scale(0.9); }
  30% { opacity: 0.85; transform: translateX(1.4px) translateY(-0.5px) scale(1); }
  100% { opacity: 0; transform: translateX(3.6px) translateY(-1.2px) scale(1.1); }
}

@media (max-width: 1280px) {
  .app { grid-template-columns: 220px 1fr; }
}

@media (max-width: 920px) {
  body {
    background:
      radial-gradient(620px 300px at 8% -10%, #e4d9f7aa, transparent 58%),
      radial-gradient(560px 300px at 95% -8%, #f6d8e7aa, transparent 62%),
      #f8f3fb;
  }
  .app {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px;
  }
  .sidebar {
    display: none;
  }
  .hero {
    padding: 12px 14px;
    background: linear-gradient(180deg, #fffdfd, #f6f0fb);
    border-bottom-color: #ddd1ea;
  }
  .hero h2 {
    font-size: 21px;
  }
  .title-sub {
    font-size: 12px;
    color: #84749f;
  }
  .main {
    border-color: #dfd2ec;
    box-shadow: 0 8px 18px rgba(121, 99, 168, 0.12);
  }
  .chat {
    padding: 14px 12px;
  }
  .message {
    border-color: #d8cbe8;
    box-shadow: 0 2px 8px rgba(121, 99, 168, 0.08);
  }
  .message.user {
    background: linear-gradient(120deg, #d5c7ec, #ccb9e7);
    border-color: #bca9da;
    color: #3c3250;
  }
  .message.assistant {
    background: linear-gradient(180deg, #fffefd, #fff7fc);
    border-color: #dbcde9;
  }
  .role {
    color: #7f7299;
  }
  .composer {
    padding: 10px;
    border-top-color: #ddd1ea;
    background: linear-gradient(180deg, #fffdfd, #faf5ff);
  }
  textarea {
    background: #ffffff;
    border-color: #cdbbe4;
  }
  textarea::placeholder {
    color: #9382ad;
  }
  .btn {
    border-color: #bda7dd;
    box-shadow: 0 4px 12px rgba(122, 95, 171, 0.2);
  }
  .btn-primary {
    background: linear-gradient(120deg, #bfa8e9, #9e82d6);
  }
  .btn-ghost {
    background: linear-gradient(120deg, #ffeef7, #f4e8ff);
    border-color: #d4b8e9;
  }
}