:root {
  --content-max: 960px;
  --avatar-size: 2.5rem;
  --sidebar-width: 304px;
  --rail-width: 360px;
  --shell-gap: 1.25rem;
  --shadow-soft: 0 18px 48px rgba(15, 23, 42, 0.09);
  --shadow-card: 0 10px 28px rgba(15, 23, 42, 0.07);
  --anim-fast: 0.16s ease;
  --anim-med: 0.24s cubic-bezier(0.22, 1, 0.36, 1);
  --brand-grad-start: #0f9d8d;
  --brand-grad-end: #0f6cbd;
  --surface-tint: color-mix(in srgb, var(--bs-body-bg) 88%, #d7efe9 12%);
  --surface-strong: color-mix(in srgb, var(--bs-body-bg) 92%, #b5d7ff 8%);
  --border-soft: color-mix(in srgb, var(--bs-border-color) 72%, transparent 28%);
}

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

body {
  font-family: Manrope, system-ui, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15, 108, 189, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 157, 141, 0.08), transparent 24%),
    linear-gradient(180deg, color-mix(in srgb, var(--bs-body-bg) 96%, #f3fbfa 4%), var(--bs-body-bg));
}

body.overlay-open {
  overflow: hidden;
}

strong,
.fw-semibold,
.fw-bold {
  font-weight: 700 !important;
}

.content-max {
  max-width: var(--content-max);
}

.workspace-eyebrow {
  letter-spacing: 0.08em;
  font-size: 0.7rem;
}

.brand-icon {
  width: var(--avatar-size);
  height: var(--avatar-size);
  background: linear-gradient(145deg, var(--brand-grad-start), var(--brand-grad-end)) !important;
  color: #fff;
  box-shadow: 0 12px 24px rgba(15, 108, 189, 0.22);
}

.app-layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

.sidebar-backdrop,
.drawer-backdrop,
.picker-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--anim-med);
}

.sidebar-backdrop {
  z-index: 1030;
}

.drawer-backdrop {
  z-index: 1040;
}

.picker-backdrop {
  z-index: 1060;
}

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

.sidebar {
  width: var(--sidebar-width);
  background: color-mix(in srgb, var(--bs-body-bg) 88%, #eef6f4 12%);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(20px);
}

.sidebar .sidebar-list {
  overflow: auto;
  padding: 0.25rem;
  flex: 1;
}

.sidebar-section {
  padding: 0.35rem 0.35rem 0.15rem;
}

.sidebar-section-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bs-secondary-color);
  padding: 0.4rem 0.35rem;
}

.sidebar-empty {
  padding: 0.5rem 0.7rem 0.75rem;
  color: var(--bs-secondary-color);
  font-size: 0.88rem;
}

.sidebar [data-copy='helper'] {
  max-height: 6.5rem;
  overflow: auto;
}

.sidebar [data-copy='helper'] p {
  margin: 0;
}

.chat-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 1rem;
  padding: 0.65rem 0.7rem;
  transition: background-color var(--anim-fast), transform var(--anim-fast), border-color var(--anim-fast);
  border: 1px solid transparent;
}

.chat-row:hover {
  background: color-mix(in srgb, var(--bs-body-bg) 60%, #ecf8f5 40%);
  transform: translateY(-1px);
}

.chat-row.active {
  background: color-mix(in srgb, var(--bs-body-bg) 45%, #e7f4ff 55%);
  border-color: color-mix(in srgb, var(--bs-primary) 24%, var(--bs-border-color) 76%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.chat-row .chat-title {
  text-align: left;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-row .chat-actions {
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity var(--anim-fast);
}

.chat-row:hover .chat-actions,
.chat-row.active .chat-actions {
  opacity: 1;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 1020;
  background: color-mix(in srgb, var(--bs-body-bg) 78%, transparent 22%);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-soft);
}

.workspace-title {
  font-size: 1.05rem;
}

.topbar-stats {
  flex-shrink: 0;
}

.workspace-pill {
  min-width: 5.6rem;
  display: grid;
  gap: 0.1rem;
  padding: 0.55rem 0.7rem;
  border-radius: 0.95rem;
  border: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bs-body-bg) 65%, #f4fbfa 35%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.workspace-pill strong,
.metric-tile strong,
.text-stat strong,
.tool-output,
#workspace-model,
#workspace-mode,
#workspace-tools,
#tool-calc-output,
#tool-timezone-output,
#tool-json-output {
  font-family: 'IBM Plex Mono', monospace;
}

.workspace-pill-label,
.metric-label,
.text-stat span {
  color: var(--bs-secondary-color);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

#model-picker-open {
  min-width: 0;
}

#active-model {
  max-width: 10rem;
}

.workspace-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, var(--rail-width));
  gap: var(--shell-gap);
  padding: 1.25rem;
  min-height: 0;
}

.chat-stage {
  min-width: 0;
  min-height: 0;
}

.chat-surface {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-soft);
  border-radius: 1.5rem;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bs-body-bg) 96%, #f7fbff 4%), var(--bs-body-bg)),
    var(--bs-body-bg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.chat-surface-header {
  padding: 1.25rem 1.25rem 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.chat-surface-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

#conversation {
  min-height: 0;
  scroll-behavior: smooth;
}

#conversation-inner {
  padding-inline: 1rem;
  padding-bottom: 0.5rem;
}

.composer-shell {
  padding: 0 1rem 1rem;
}

.composer-panel {
  display: grid;
  gap: 0.85rem;
  padding: 0.95rem;
  border: 1px solid var(--border-soft);
  border-radius: 1.25rem;
  background: color-mix(in srgb, var(--bs-body-bg) 72%, #eff8f5 28%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.composer-quickbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.quick-toggle {
  border: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bs-body-bg) 82%, #ffffff 18%);
  color: inherit;
  border-radius: 999px;
  padding: 0.42rem 0.78rem;
  font-size: 0.84rem;
  transition: background-color var(--anim-fast), border-color var(--anim-fast), transform var(--anim-fast);
}

.quick-toggle:hover {
  transform: translateY(-1px);
}

.quick-toggle.active {
  background: color-mix(in srgb, var(--bs-body-bg) 48%, #ddf2ff 52%);
  border-color: color-mix(in srgb, var(--bs-primary) 30%, var(--bs-border-color) 70%);
}

.composer-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
}

.workspace-rail {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.rail-card {
  border: 1px solid var(--border-soft);
  border-radius: 1.35rem;
  padding: 1rem;
  background: color-mix(in srgb, var(--bs-body-bg) 76%, #f4faf8 24%);
  box-shadow: var(--shadow-card);
}

.rail-card-primary {
  background:
    radial-gradient(circle at top right, rgba(15, 157, 141, 0.14), transparent 48%),
    linear-gradient(180deg, color-mix(in srgb, var(--bs-body-bg) 78%, #ebf6ff 22%), color-mix(in srgb, var(--bs-body-bg) 92%, #f8fbff 8%));
}

.rail-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.rail-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.rail-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-tile,
.text-stat {
  display: grid;
  gap: 0.2rem;
  padding: 0.8rem 0.85rem;
  border-radius: 1rem;
  border: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bs-body-bg) 58%, #ffffff 42%);
}

.prompt-chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.preset-stack {
  display: grid;
  gap: 0.75rem;
}

.preset-card {
  text-align: left;
  display: grid;
  gap: 0.25rem;
  border: 1px solid var(--border-soft);
  border-radius: 1rem;
  background: color-mix(in srgb, var(--bs-body-bg) 78%, #ffffff 22%);
  padding: 0.9rem 0.95rem;
  transition: transform var(--anim-fast), border-color var(--anim-fast), background-color var(--anim-fast);
}

.preset-card:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--bs-primary) 24%, var(--bs-border-color) 76%);
  background: color-mix(in srgb, var(--bs-body-bg) 64%, #edf8ff 36%);
}

.preset-card strong {
  font-size: 0.95rem;
}

.preset-card span {
  font-size: 0.86rem;
  color: var(--bs-secondary-color);
}

.prompt-chip {
  border: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bs-body-bg) 75%, #eef7ff 25%);
  color: inherit;
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 0.88rem;
  transition: transform var(--anim-fast), background-color var(--anim-fast), border-color var(--anim-fast);
}

.prompt-chip:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--bs-body-bg) 55%, #def1ff 45%);
  border-color: color-mix(in srgb, var(--bs-primary) 24%, var(--bs-border-color) 76%);
}

.tool-stack {
  display: grid;
  gap: 1rem;
}

.tool-widget {
  display: grid;
  gap: 0.55rem;
}

.tool-output {
  min-height: 2.75rem;
  display: block;
  padding: 0.75rem 0.85rem;
  border-radius: 0.95rem;
  border: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bs-body-bg) 62%, #ffffff 38%);
  font-size: 0.86rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.text-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(92vw, 440px);
  background: var(--bs-body-bg);
  border-left: 1px solid var(--bs-border-color);
  transform: translateX(100%);
  transition: transform var(--anim-med);
  box-shadow: var(--shadow-soft);
  overflow: auto;
  z-index: 1050;
}

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

.drawer .drawer-header,
.picker .picker-header {
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bs-body-bg) 88%, transparent 12%);
  backdrop-filter: blur(14px);
  z-index: 2;
}

.picker {
  position: fixed;
  inset: 12vh 0 auto 0;
  width: min(92vw, 760px);
  margin: 0 auto;
  background: var(--bs-body-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-soft);
  transform: translateY(8px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--anim-med), opacity var(--anim-med);
  z-index: 1070;
}

.picker.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.picker .model-row {
  text-align: left;
}

.picker .model-row:hover {
  background: var(--bs-tertiary-bg);
}

.markdown-body {
  background: transparent !important;
  color: inherit;
}

.markdown-body pre {
  background-color: var(--bs-tertiary-bg) !important;
  border: 1px solid var(--bs-border-color);
  border-radius: 0.75rem;
  padding: 0.9rem;
  position: relative;
}

.markdown-body code {
  background-color: var(--bs-tertiary-bg);
  color: inherit;
}

.markdown-body code[class*='language-'],
.markdown-body pre[class*='language-'] {
  background: transparent !important;
  color: inherit;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 1;
  opacity: 0.85;
  transition: opacity 0.15s ease-in-out;
}

pre:hover .copy-btn {
  opacity: 1;
}

.empty-state {
  padding-top: 2rem !important;
}

.empty-state .markdown-body {
  padding: 1.5rem;
  border: 1px dashed var(--border-soft);
  border-radius: 1.25rem;
  background: color-mix(in srgb, var(--bs-body-bg) 74%, #f6fafb 26%);
}

.message {
  max-width: var(--content-max);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--anim-fast), transform var(--anim-fast);
}

.message.appear {
  opacity: 1;
  transform: none;
}

.message .avatar {
  width: var(--avatar-size);
  height: var(--avatar-size);
}

.message .card {
  border-radius: 1.25rem;
  box-shadow: var(--shadow-card) !important;
  background: color-mix(in srgb, var(--bs-body-bg) 82%, #fafefe 18%);
}

.message[data-role='user'] .card {
  background: color-mix(in srgb, var(--bs-body-bg) 58%, #e7f7f3 42%);
}

.message[data-role='assistant'] .card {
  background: color-mix(in srgb, var(--bs-body-bg) 72%, #eef5ff 28%);
}

.message .message-actions {
  opacity: 0;
  transition: opacity var(--anim-fast);
}

.message:hover .message-actions {
  opacity: 1;
}

#user-input {
  min-height: 52px;
  border-radius: 1rem;
  padding: 0.85rem 1rem;
  border-color: color-mix(in srgb, var(--bs-border-color) 78%, transparent 22%);
  background: color-mix(in srgb, var(--bs-body-bg) 80%, #ffffff 20%);
}

textarea.form-control {
  resize: vertical;
}

#scroll-bottom {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 1015;
  box-shadow: var(--shadow-card);
  border-radius: 999px;
}

.toast-container {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.5rem;
  max-width: min(92vw, 360px);
  z-index: 1080;
}

.app-toast {
  background: var(--bs-body-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: 0.95rem;
  box-shadow: var(--shadow-card);
  padding: 0.75rem;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--anim-fast), transform var(--anim-fast);
  cursor: pointer;
}

.app-toast.show {
  opacity: 1;
  transform: none;
}

.app-toast-title {
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.app-toast-neutral {
  border-color: var(--bs-border-color);
}

.app-toast-success {
  border-color: rgba(25, 135, 84, 0.35);
}

.app-toast-warning {
  border-color: rgba(255, 193, 7, 0.45);
}

.app-toast-danger {
  border-color: rgba(220, 53, 69, 0.35);
}

.app-dialog {
  border: 1px solid var(--bs-border-color);
  border-radius: 1rem;
  padding: 0;
  width: min(92vw, 520px);
  box-shadow: var(--shadow-soft);
  background: var(--bs-body-bg);
}

.app-dialog::backdrop {
  background: rgba(15, 23, 42, 0.35);
}

@media (max-width: 1399.98px) {
  .workspace-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .workspace-rail {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 991.98px) {
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    transform: translateX(-100%);
    transition: transform var(--anim-med);
    box-shadow: var(--shadow-soft);
    z-index: 1040;
  }

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

  .sidebar:not(.open) #sidebar-close {
    display: none !important;
  }

  .workspace-shell {
    padding: 0.9rem;
  }

  .workspace-rail {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 767.98px) {
  .chat-surface-header,
  .composer-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .composer-quickbar {
    gap: 0.45rem;
  }

  .chat-surface-actions,
  .rail-actions {
    grid-template-columns: minmax(0, 1fr);
  }

  .text-stat-grid,
  .rail-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 575.98px) {
  #active-model {
    max-width: 7rem;
  }

  .workspace-shell {
    padding: 0.75rem;
  }

  .chat-surface-header {
    padding: 1rem 1rem 0.35rem;
  }

  #conversation-inner,
  .composer-shell {
    padding-inline: 0.75rem;
  }

  .text-stat-grid,
  .rail-metrics {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 992px) {
  .sidebar-backdrop {
    display: none !important;
  }
}