:root {
  color-scheme: dark;
  --bg: #050b14;
  --panel: rgba(11, 24, 41, 0.9);
  --panel-solid: #0c192a;
  --panel-raised: #12233a;
  --line: rgba(160, 194, 230, 0.15);
  --line-strong: rgba(132, 187, 237, 0.28);
  --text: #eef7ff;
  --muted: #91a7bc;
  --cyan: #4ee4c3;
  --blue: #5da9ff;
  --purple: #8a6cff;
  --danger: #ff7d8f;
  --user: linear-gradient(135deg, #1878f2, #7357e8);
  --ai: #13253a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Khmer", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 0%, rgba(21, 123, 219, 0.25), transparent 34rem),
    radial-gradient(circle at 94% 18%, rgba(46, 218, 178, 0.16), transparent 30rem),
    var(--bg);
}

body.overlay-open {
  overflow: hidden;
}

button,
textarea,
input {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
}

button:focus-visible,
textarea:focus-visible,
input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.app-shell {
  width: min(100%, 920px);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 18px calc(18px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-rows: auto auto minmax(500px, 1fr) auto;
  gap: 18px;
}

.topbar {
  min-height: 76px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.brand,
.sidebar-brand {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(115, 238, 214, 0.4);
  border-radius: 15px;
  background: linear-gradient(145deg, rgba(78, 228, 195, 0.22), rgba(70, 130, 255, 0.24));
  color: var(--cyan);
  font-weight: 800;
  letter-spacing: -0.04em;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.12);
}

.brand-mark.small {
  width: 38px;
  height: 38px;
  border-radius: 13px;
  font-size: 0.83rem;
}

.brand h1,
.brand p,
.sidebar-brand strong,
.sidebar-brand span {
  margin: 0;
}

.brand h1 {
  overflow: hidden;
  font-size: 1.03rem;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.76rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  display: inline-block;
  margin-right: 4px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 7px;
}

.icon-button,
.account-button {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.035);
}

.icon-button.compact {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

.icon-button svg,
.send-button svg,
.model-trigger svg,
.new-chat-button svg,
.chat-search svg,
.profile-card svg {
  width: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-button:active,
.account-button:active {
  transform: scale(0.96);
}

.account-button {
  overflow: hidden;
  padding: 0;
  border-color: rgba(78, 228, 195, 0.28);
}

.profile-avatar {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: #c7fff1;
  background: linear-gradient(145deg, rgba(78, 228, 195, 0.35), rgba(93, 169, 255, 0.28));
  font-size: 0.76rem;
  font-weight: 800;
}

.intro {
  padding: 16px 4px 4px;
}

.eyebrow,
.modal-kicker {
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.intro h2,
.intro p {
  margin: 0;
}

.intro h2 {
  max-width: 700px;
  font-size: clamp(1.55rem, 5vw, 2.65rem);
  line-height: 1.35;
  letter-spacing: -0.035em;
}

.intro p {
  max-width: 690px;
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

.chat-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(270px, 1fr) auto auto auto;
  overflow: visible;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.messages {
  min-height: 270px;
  overflow-y: auto;
  padding: 22px 18px 12px;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
}

.message {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  margin-bottom: 16px;
  animation: message-in 220ms ease-out both;
}

.message.user {
  flex-direction: row-reverse;
}

.avatar {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(78, 228, 195, 0.14);
  color: var(--cyan);
  font-size: 0.66rem;
  font-weight: 800;
}

.message.user .avatar {
  background: rgba(109, 126, 245, 0.18);
  color: #bdc7ff;
}

.bubble {
  max-width: min(82%, 640px);
  padding: 11px 14px 8px;
  border: 1px solid rgba(255, 255, 255, 0.055);
  border-radius: 18px 18px 18px 5px;
  background: var(--ai);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.message.user .bubble {
  border: 0;
  border-radius: 18px 18px 5px 18px;
  background: var(--user);
}

.bubble p {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.92rem;
  line-height: 1.7;
}

.bubble time {
  display: block;
  margin-top: 4px;
  color: rgba(231, 243, 255, 0.52);
  font-size: 0.63rem;
  text-align: right;
}

.typing .bubble p::after {
  content: "•••";
  color: var(--cyan);
  letter-spacing: 0.16em;
  animation: pulse 900ms infinite alternate;
}

.suggestions {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 16px 12px;
  scrollbar-width: none;
}

.suggestions::-webkit-scrollbar {
  display: none;
}

.suggestions button {
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid rgba(106, 184, 255, 0.22);
  border-radius: 999px;
  color: #bcd8f3;
  background: rgba(55, 121, 181, 0.09);
  font-size: 0.75rem;
}

.suggestions button:active {
  color: white;
  background: rgba(55, 121, 181, 0.2);
}

.composer {
  position: relative;
  margin: 0 13px;
  padding: 7px 7px 7px 15px;
  display: flex;
  align-items: flex-end;
  gap: 8px;
  border: 1px solid rgba(125, 169, 208, 0.2);
  border-radius: 20px;
  background: rgba(4, 11, 20, 0.76);
  transition: border-color 160ms, box-shadow 160ms;
}

.composer:focus-within {
  border-color: rgba(78, 228, 195, 0.48);
  box-shadow: 0 0 0 3px rgba(78, 228, 195, 0.07);
}

textarea {
  width: 100%;
  min-width: 0;
  max-height: 130px;
  resize: none;
  overflow-y: auto;
  border: 0;
  outline: 0;
  color: var(--text);
  background: transparent;
  line-height: 1.55;
}

textarea::placeholder,
input::placeholder {
  color: #6d8297;
}

.send-button {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 14px;
  color: #04130f;
  background: linear-gradient(135deg, var(--cyan), #73b5ff);
  box-shadow: 0 8px 24px rgba(56, 216, 185, 0.2);
}

.send-button:disabled {
  opacity: 0.45;
}

.send-button:active:not(:disabled) {
  transform: translateY(1px) scale(0.97);
}

.model-picker {
  position: relative;
  flex: 0 0 auto;
}

.model-trigger {
  height: 42px;
  min-width: 90px;
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  color: #d9edff;
  background: rgba(26, 51, 78, 0.74);
}

.model-trigger > span {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  color: #06131e;
  background: var(--cyan);
  font-size: 0.68rem;
  font-weight: 900;
}

.model-trigger strong {
  font-size: 0.72rem;
}

.model-trigger svg {
  width: 14px;
  transition: transform 160ms;
}

.model-trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.model-menu {
  position: absolute;
  z-index: 40;
  right: -50px;
  bottom: calc(100% + 12px);
  width: min(330px, calc(100vw - 32px));
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 19px;
  background: rgba(11, 24, 41, 0.98);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(22px);
  animation: pop-in 150ms ease-out both;
}

.model-menu[hidden] {
  display: none;
}

.model-menu button {
  width: 100%;
  padding: 10px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 13px;
  color: var(--text);
  text-align: left;
  background: transparent;
}

.model-menu button:hover,
.model-menu button[aria-checked="true"] {
  background: rgba(93, 169, 255, 0.12);
}

.mode-number {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--cyan);
  background: rgba(78, 228, 195, 0.12);
  font-weight: 800;
}

.model-menu button > span:nth-child(2) {
  min-width: 0;
}

.model-menu strong,
.model-menu small {
  display: block;
}

.model-menu strong {
  font-size: 0.82rem;
}

.model-menu small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.67rem;
  line-height: 1.45;
}

.mode-check {
  color: var(--cyan);
  opacity: 0;
}

.model-menu button[aria-checked="true"] .mode-check {
  opacity: 1;
}

.model-menu > p {
  margin: 6px 8px 2px;
  color: #6f8499;
  font-size: 0.62rem;
  line-height: 1.45;
}

.hint {
  margin: 0;
  padding: 9px 16px 13px;
  color: #73879a;
  font-size: 0.68rem;
  text-align: center;
}

footer {
  display: flex;
  justify-content: center;
  gap: 7px;
  color: #5f7589;
  font-size: 0.68rem;
  text-align: center;
}

.drawer-backdrop,
.modal-backdrop {
  position: fixed;
  z-index: 80;
  inset: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
  background: rgba(1, 5, 12, 0.66);
  backdrop-filter: blur(4px);
  transition: opacity 190ms ease;
}

.drawer-backdrop.open,
.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.sidebar {
  position: fixed;
  z-index: 90;
  inset: 0 auto 0 0;
  width: min(88vw, 360px);
  padding: calc(16px + env(safe-area-inset-top)) 14px calc(14px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr) auto;
  gap: 13px;
  transform: translateX(-105%);
  border-right: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 0 0, rgba(30, 124, 211, 0.24), transparent 23rem),
    #081321;
  box-shadow: 28px 0 80px rgba(0, 0, 0, 0.46);
  transition: transform 220ms cubic-bezier(.2,.8,.2,1);
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-head {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sidebar-brand {
  min-width: 0;
}

.sidebar-brand > div {
  min-width: 0;
}

.sidebar-brand strong,
.sidebar-brand span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-brand strong {
  font-size: 0.86rem;
}

.sidebar-brand span {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.65rem;
}

.new-chat-button {
  width: 100%;
  min-height: 48px;
  padding: 0 13px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(78, 228, 195, 0.32);
  border-radius: 15px;
  color: var(--text);
  text-align: left;
  background: linear-gradient(135deg, rgba(78, 228, 195, 0.13), rgba(93, 169, 255, 0.1));
}

.new-chat-button svg {
  color: var(--cyan);
}

.new-chat-button span {
  font-weight: 700;
}

.new-chat-button kbd {
  min-width: 25px;
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.67rem;
  text-align: center;
}

.chat-search {
  height: 42px;
  padding: 0 11px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.035);
}

.chat-search svg {
  width: 18px;
  color: var(--muted);
}

.chat-search input {
  width: 100%;
  border: 0;
  outline: 0;
  color: var(--text);
  background: transparent;
  font-size: 0.78rem;
}

.conversation-nav {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.conversation-section + .conversation-section {
  margin-top: 18px;
}

.section-title {
  padding: 0 7px 7px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #7f94a9;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-title span:last-child {
  min-width: 22px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.6rem;
  text-align: center;
}

.conversation-list {
  display: grid;
  gap: 4px;
}

.conversation-empty {
  margin: 0;
  padding: 11px;
  color: #60778d;
  font-size: 0.7rem;
  text-align: center;
}

.conversation-item {
  width: 100%;
  padding: 9px 8px 9px 11px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 5px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: #cfe0ef;
  background: transparent;
}

.conversation-item:hover,
.conversation-item.active {
  border-color: var(--line);
  background: rgba(93, 169, 255, 0.09);
}

.conversation-main {
  min-width: 0;
  border: 0;
  color: inherit;
  text-align: left;
  background: transparent;
}

.conversation-main strong,
.conversation-main time {
  display: block;
}

.conversation-main strong {
  overflow: hidden;
  font-size: 0.75rem;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.conversation-main time {
  margin-top: 3px;
  color: #688096;
  font-size: 0.61rem;
}

.pin-button {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  color: #6e869c;
  background: transparent;
}

.pin-button:hover,
.pin-button.pinned {
  color: var(--cyan);
  background: rgba(78, 228, 195, 0.09);
}

.pin-button svg {
  width: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.profile-card {
  width: 100%;
  min-height: 58px;
  padding: 8px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 15px;
  color: var(--text);
  text-align: left;
  background: rgba(255, 255, 255, 0.035);
}

.profile-copy {
  min-width: 0;
}

.profile-copy strong,
.profile-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-copy strong {
  font-size: 0.76rem;
}

.profile-copy small {
  margin-top: 3px;
  color: #6f879e;
  font-size: 0.58rem;
}

.profile-card svg {
  width: 16px;
  color: var(--muted);
}

.account-modal {
  position: fixed;
  z-index: 100;
  top: 50%;
  left: 50%;
  width: min(calc(100% - 28px), 520px);
  max-height: min(86vh, 760px);
  max-height: min(86dvh, 760px);
  overflow-y: auto;
  padding: 20px;
  transform: translate(-50%, -46%) scale(0.98);
  opacity: 0;
  border: 1px solid var(--line-strong);
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0, rgba(75, 222, 192, 0.12), transparent 20rem),
    #0a1727;
  box-shadow: var(--shadow);
  transition: opacity 180ms, transform 180ms;
}

.account-modal[hidden],
.modal-backdrop[hidden] {
  display: none;
}

.account-modal.open {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.modal-head h2 {
  margin: 0;
  font-size: 1.2rem;
}

.modal-kicker {
  display: block;
  margin-bottom: 5px;
  font-size: 0.62rem;
}

.modal-description,
.auth-note {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.65;
}

.profile-list {
  margin: 16px 0;
  display: grid;
  gap: 7px;
}

.profile-row {
  padding: 8px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.028);
}

.profile-row.active {
  border-color: rgba(78, 228, 195, 0.42);
  background: rgba(78, 228, 195, 0.07);
}

.profile-row-copy {
  min-width: 0;
}

.profile-row-copy strong,
.profile-row-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-row-copy strong {
  font-size: 0.77rem;
}

.profile-row-copy small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.61rem;
}

.switch-profile {
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: #d9edff;
  background: rgba(93, 169, 255, 0.1);
  font-size: 0.67rem;
}

.profile-row.active .switch-profile {
  color: #06201a;
  background: var(--cyan);
}

.profile-form {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.025);
}

.profile-form label {
  display: block;
  margin-bottom: 8px;
  color: #cfe0ef;
  font-size: 0.72rem;
  font-weight: 700;
}

.profile-form > div {
  display: flex;
  gap: 7px;
}

.profile-form input {
  min-width: 0;
  flex: 1;
  padding: 10px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  outline: 0;
  color: var(--text);
  background: rgba(4, 11, 20, 0.68);
}

.profile-form button {
  padding: 0 13px;
  border: 0;
  border-radius: 10px;
  color: #062019;
  background: var(--cyan);
  font-size: 0.7rem;
  font-weight: 800;
}

.auth-divider {
  margin: 19px 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #6f859b;
  font-size: 0.65rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.provider-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.provider-buttons button {
  min-height: 62px;
  padding: 9px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  color: var(--text);
  text-align: left;
  background: rgba(255, 255, 255, 0.035);
}

.provider-logo {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #f4f7fb;
  font-weight: 900;
}

.provider-logo.google {
  color: #4285f4;
}

.provider-logo.apple {
  color: #0b1018;
}

.provider-buttons strong,
.provider-buttons small {
  display: block;
}

.provider-buttons strong {
  font-size: 0.69rem;
}

.provider-buttons small {
  margin-top: 3px;
  color: #7d93a8;
  font-size: 0.57rem;
  line-height: 1.35;
}

.auth-note {
  margin: 12px 0 0;
  color: #71879c;
  font-size: 0.64rem;
}

.toast {
  position: fixed;
  z-index: 120;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  width: max-content;
  max-width: min(calc(100% - 28px), 520px);
  padding: 11px 14px;
  transform: translateX(-50%);
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  color: #ddedfb;
  background: rgba(12, 25, 42, 0.97);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  font-size: 0.72rem;
  line-height: 1.5;
  text-align: center;
  animation: toast-in 180ms ease-out both;
}

.toast[hidden] {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

@keyframes pop-in {
  from { opacity: 0; transform: translateY(5px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes pulse {
  to { opacity: 0.35; }
}

@media (min-width: 720px) {
  .app-shell {
    padding-inline: 28px;
  }

  .chat-panel {
    min-height: 580px;
  }

  .messages {
    padding: 28px 26px 14px;
  }

  .composer {
    margin-inline: 20px;
  }

  .model-menu {
    right: -6px;
  }
}

@media (max-width: 520px) {
  .app-shell {
    padding-inline: 10px;
    gap: 12px;
  }

  .topbar {
    gap: 8px;
  }

  .brand {
    gap: 8px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 13px;
    font-size: 0.85rem;
  }

  .brand h1 {
    font-size: 0.93rem;
  }

  .brand p {
    font-size: 0.67rem;
  }

  .icon-button,
  .account-button {
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }

  .topbar-actions {
    gap: 5px;
  }

  .intro {
    padding-inline: 7px;
  }

  .chat-panel {
    border-radius: 21px;
  }

  .composer {
    padding-left: 12px;
    gap: 5px;
  }

  .model-trigger {
    min-width: 48px;
    padding-inline: 7px;
  }

  .model-trigger strong,
  .model-trigger svg {
    display: none;
  }

  .model-menu {
    right: -48px;
  }

  .provider-buttons {
    grid-template-columns: 1fr;
  }

  footer {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}