:root {
  color-scheme: light;
  --bg: #f5f4f0;
  --panel: #ffffff;
  --border: #dddbd3;
  --border-soft: #e8e7e3;
  --text: #1a1a1a;
  --muted: #888;
  --soft-text: #666;
  --sidebar: #f9f8f5;
  --surface: #f5f4f0;
  --surface-2: #f0efe9;
  --dark: #1a1a1a;
  --green: #3b6d11;
  --green-bg: #c0dd97;
  --red: #b94b35;
}

* {
  box-sizing: border-box;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.25);
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.7), transparent 28%),
    var(--bg);
  color: var(--text);
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: none;
  transition: all 0.2s ease;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

:focus-visible {
  outline: 2px solid var(--dark);
  outline-offset: 2px;
}

.page-shell {
  padding: 4px;
}

.app {
  display: flex;
  height: calc(100vh - 8px);
  min-height: 680px;
  background: var(--panel);
  border-radius: 16px;
  border: 0.5px solid var(--border);
  overflow: hidden;
}

.sidebar {
  width: 240px;
  background: var(--sidebar);
  border-right: 0.5px solid #e0ded7;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 16px 14px 12px;
  border-bottom: 0.5px solid #e0ded7;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.logo-mark {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark);
  flex-shrink: 0;
}

.logo-mark svg {
  width: 30px;
  height: 30px;
  display: block;
}

.logo-text {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
  line-height: 1.2;
}

.new-chat-btn {
  width: 100%;
  padding: 7px 10px;
  background: var(--dark);
  color: #fff;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.new-chat-btn svg {
  width: 13px;
  height: 13px;
}

.sidebar-section {
  padding: 10px 14px 4px;
  font-size: 10px;
  font-weight: 500;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.chat-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
}

.chat-item {
  width: 100%;
  text-align: left;
  background: transparent;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 2px;
  transition: background 0.2s ease;
}

.chat-item:hover {
  background: #efefec;
}

.chat-item.active {
  background: #e8e7e3;
}

.chat-item-title {
  font-size: 12.5px;
  font-weight: 500;
  color: #2c2c2a;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-item-meta {
  font-size: 11px;
  color: #999;
  margin-top: 2px;
}

.sidebar-footer {
  padding: 12px 8px;
  border-top: 0.5px solid #e0ded7;
}

.user-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
}

.avatar,
.msg-avatar.user {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--green-bg);
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  flex-shrink: 0;
}

.user-info {
  min-width: 0;
}

.user-name {
  font-size: 12.5px;
  font-weight: 500;
  color: #2c2c2a;
}

.user-plan {
  font-size: 11px;
  color: #999;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-topbar {
  padding: 14px 20px;
  border-bottom: 0.5px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.chat-title-area {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.chat-title {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.model-badge {
  padding: 4px 10px;
  background: var(--surface-2);
  border: 0.5px solid var(--border);
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 500;
  color: #444;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  white-space: nowrap;
}

.model-dot,
.health-dot {
  width: 8px;
  height: 8px;
  background: #9b978c;
  border-radius: 50%;
  flex: 0 0 auto;
}

.model-dot.ok,
.health-dot.ok {
  background: #3b6d11;
}

.model-dot.error,
.health-dot.error {
  background: var(--red);
}

.topbar-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

.icon-btn,
.config-btn,
.secondary-btn,
.plain-icon-btn,
.field-action {
  cursor: pointer;
}

.icon-btn {
  width: 32px;
  height: 32px;
  border: 0.5px solid var(--border);
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover,
.config-btn:hover,
.secondary-btn:hover,
.clear-btn:hover,
.field-action:hover,
.plain-icon-btn:hover {
  background: var(--surface);
}

.icon-btn:disabled:hover,
.config-btn:disabled:hover,
.secondary-btn:disabled:hover,
.clear-btn:disabled:hover,
.field-action:disabled:hover,
.plain-icon-btn:disabled:hover {
  background: #fff;
}

.config-btn {
  padding: 6px 12px;
  background: #fff;
  border: 0.5px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: #444;
  display: flex;
  align-items: center;
  gap: 5px;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 24px 12px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.empty-state {
  max-width: 540px;
  padding: 12px 0;
  margin: auto;
  text-align: center;
}

.empty-state h1 {
  margin: 0 0 10px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.empty-state p {
  margin: 0;
  font-size: 14px;
  color: var(--soft-text);
  line-height: 1.7;
}

.msg {
  display: flex;
  gap: 12px;
  max-width: 100%;
}

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

.msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
}

.msg-avatar.ai {
  background: var(--dark);
  color: #fff;
}

.msg-content {
  max-width: 68%;
}

.msg.user .msg-content {
  align-items: flex-end;
  display: flex;
  flex-direction: column;
}

.bubble {
  padding: 11px 14px;
  border-radius: 14px;
  font-size: 13.5px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.bubble.ai {
  background: var(--surface);
  color: #2c2c2a;
  border-radius: 4px 14px 14px 14px;
}

.bubble.user {
  background: var(--dark);
  color: #f5f4f0;
  border-radius: 14px 4px 14px 14px;
}

.msg-time {
  font-size: 10.5px;
  color: #bbb;
  margin-top: 4px;
  padding: 0 4px;
}

.msg-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.msg-action {
  padding: 3px 8px;
  background: transparent;
  border: 0.5px solid #e0ded7;
  border-radius: 6px;
  font-size: 11px;
  color: #888;
  cursor: pointer;
}

.msg-action:hover {
  background: var(--surface);
  color: #444;
}

.typing-row {
  padding: 0 24px 12px;
}

.typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--surface);
  border-radius: 4px 14px 14px 14px;
  width: fit-content;
}

.dot {
  width: 6px;
  height: 6px;
  background: #bbb;
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}

.dot:nth-child(2) {
  animation-delay: 0.2s;
}

.dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  0%,
  60%,
  100% {
    transform: translateY(0);
  }

  30% {
    transform: translateY(-5px);
  }
}

.input-area {
  padding: 14px 20px 16px;
  border-top: 0.5px solid var(--border-soft);
}

.input-toolbar {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.tool-pill {
  padding: 4px 10px;
  border: 0.5px solid var(--border);
  border-radius: 20px;
  font-size: 11.5px;
  color: #666;
  background: #fff;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tool-pill.active {
  background: #e8e7e3;
  border-color: #c8c6be;
  color: #333;
}

.tool-pill.inactive {
  opacity: 0.9;
}

.status-pill {
  max-width: 100%;
}

.input-box {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--surface);
  border: 0.5px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  transition: all 0.2s ease;
}

.input-box:focus-within {
  border-color: #aaa;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.input-box textarea {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 13.5px;
  color: var(--text);
  resize: none;
  outline: none;
  font-family: inherit;
  line-height: 1.5;
  min-height: 22px;
  max-height: 120px;
}

.input-box textarea::placeholder {
  color: #bbb;
}

.send-btn {
  width: 32px;
  height: 32px;
  background: var(--dark);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.send-btn:not(:disabled):hover {
  background: #333;
}

.send-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.send-btn svg {
  width: 14px;
  height: 14px;
}

.input-hint {
  font-size: 11px;
  color: #999;
  margin-top: 6px;
  text-align: center;
  min-height: 1.2em;
}

.config-panel {
  width: 360px;
  background: #fff;
  border-left: 0.5px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.config-panel.hidden-panel {
  display: none;
}

.config-header {
  padding: 14px 16px 12px;
  border-bottom: 0.5px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.config-header-title {
  font-size: 13px;
  font-weight: 500;
}

.plain-icon-btn {
  width: 24px;
  height: 24px;
  background: transparent;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.config-scroll {
  flex: 1;
  overflow-y: auto;
}

.config-section {
  padding: 14px 16px;
  border-bottom: 0.5px solid #f0efe9;
}

.config-section.no-border {
  border-bottom: none;
}

.config-label {
  font-size: 11px;
  font-weight: 500;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.config-field {
  margin-bottom: 12px;
}

.config-field.compact-gap {
  margin-top: 12px;
  margin-bottom: 0;
}

.field-label {
  font-size: 12px;
  color: #555;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.field-val {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 5px;
}

.config-input,
.model-select,
.system-prompt-area {
  width: 100%;
  padding: 8px 10px;
  border: 0.5px solid var(--border);
  border-radius: 8px;
  font-size: 12.5px;
  background: #fff;
  color: var(--text);
  outline: none;
}

.config-input:focus,
.model-select:focus,
.system-prompt-area:focus {
  border-color: #aaa;
}

.system-prompt-area {
  resize: vertical;
  min-height: 94px;
  background: #fafaf8;
  line-height: 1.5;
}

.inline-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.secondary-btn,
.clear-btn,
.field-action {
  padding: 7px 10px;
  background: #fff;
  border: 0.5px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  color: #555;
}

.field-action {
  padding: 3px 8px;
  font-size: 11px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--dark);
  height: 4px;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.toggle-label {
  font-size: 12.5px;
  color: #333;
}

.toggle {
  width: 34px;
  height: 19px;
  background: var(--dark);
  border-radius: 10px;
  position: relative;
  cursor: pointer;
}

.toggle.off {
  background: var(--border);
}

.toggle-knob {
  width: 15px;
  height: 15px;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: 2px;
  right: 2px;
  transition: right 0.15s;
}

.toggle.off .toggle-knob {
  right: 17px;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 11.5px;
  margin-bottom: 10px;
}

.stat-card {
  background: var(--surface);
  padding: 8px 10px;
  border-radius: 8px;
}

.stat-label {
  color: #888;
  margin-bottom: 2px;
}

.stat-value {
  font-weight: 500;
  color: var(--text);
}

.hidden {
  display: none;
}

.markdown p,
.markdown ul,
.markdown ol,
.markdown pre,
.markdown blockquote,
.markdown h1,
.markdown h2,
.markdown h3 {
  margin: 0 0 1em;
}

.markdown > :last-child {
  margin-bottom: 0;
}

.markdown ul,
.markdown ol {
  padding-left: 1.35rem;
}

.markdown pre,
.markdown code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.markdown pre {
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 12px;
}

.bubble.user .markdown pre {
  background: rgba(255, 255, 255, 0.12);
}

.markdown code:not(pre code) {
  background: rgba(0, 0, 0, 0.06);
  border-radius: 5px;
  padding: 0.08rem 0.3rem;
}

.bubble.user .markdown code:not(pre code) {
  background: rgba(255, 255, 255, 0.12);
}

.markdown blockquote {
  padding-left: 12px;
  border-left: 3px solid rgba(0, 0, 0, 0.12);
  color: #5c5a54;
}

.markdown a {
  color: inherit;
}

@media (max-width: 1100px) {
  .config-panel {
    width: 300px;
  }
}

@media (max-width: 960px) {
  .sidebar {
    display: none;
  }

  .msg-content {
    max-width: 82%;
  }
}

@media (max-width: 760px) {
  .page-shell {
    padding: 0;
  }

  .app {
    height: 100vh;
    min-height: 100vh;
    border-radius: 0;
    border: none;
  }

  .config-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(360px, 92vw);
    box-shadow: -10px 0 28px rgba(0, 0, 0, 0.08);
    z-index: 20;
  }

  .chat-topbar {
    padding: 14px 14px;
  }

  .messages {
    padding: 18px 14px 10px;
  }

  .typing-row {
    padding: 0 14px 10px;
  }

  .input-area {
    padding: 12px 14px 14px;
  }

  .msg-content {
    max-width: 90%;
  }

  .inline-field {
    grid-template-columns: 1fr;
  }
}