@use 'kit-deps' as *;

// ─── Breakpoints ───────────────────────────────────────────────────────────
$bp-mobile: 768px;
$bp-sidebar-drawer: 1280px;

// ─── App shell ─────────────────────────────────────────────────────────────
$sidebar-width: 380px;

html, body {
  height: 100%;
}

*::-webkit-scrollbar {
  width: 10px;
}

*::-webkit-scrollbar-track {
  width: 10px;
  background: #16161e;
  cursor: pointer;
}

*::-webkit-scrollbar-thumb {
  width: 10px;
  background: #414868;
  cursor: default;
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

*::-webkit-scrollbar-button {
  display: none;
}

// #app is the Vue mount point — full viewport flex container
#app {
  display: flex;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

// ─── Main content area (sibling of sidebar) ────────────────────────────────
.app-main {
  flex: 1 1 0;       // flex-basis:0 prevents content from dictating height
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: $surface-page;
}

// ─── Sidebar ───────────────────────────────────────────────────────────────
.app-sidebar {
  width: $sidebar-width;
  min-width: $sidebar-width;
  max-width: $sidebar-width;
  display: flex;
  flex-direction: column;
  background: $surface-panel;
  border-right: $border-width-base $border-style-base $border-color-muted;
  overflow: hidden;
  flex-shrink: 0;
  transition:
    width 0.22s ease,
    min-width 0.22s ease,
    max-width 0.22s ease,
    border-color 0.22s ease,
    transform 0.28s ease;

  &.is-hidden-by-artifacts {
    width: 0;
    min-width: 0;
    max-width: 0;
    border-right-color: transparent;
  }

  @media (max-width: $bp-sidebar-drawer) {
    position: fixed;
    inset: 0;
    z-index: 100;
    width: min(#{$sidebar-width}, 92vw) !important;
    min-width: min(#{$sidebar-width}, 92vw) !important;
    transform: translateX(-100%);
    transition: transform 0.28s ease;

    &.is-mobile-open {
      transform: translateX(0);
    }

    &.is-hidden-by-artifacts {
      width: min(#{$sidebar-width}, 92vw) !important;
      min-width: min(#{$sidebar-width}, 92vw) !important;
      max-width: min(#{$sidebar-width}, 92vw) !important;
      border-right-color: $border-color-muted;
    }
  }

  @media (max-width: 980px) {
    width: 100vw !important;
    min-width: 100vw !important;
    max-width: 100vw !important;

    &.is-hidden-by-artifacts {
      width: 100vw !important;
      min-width: 100vw !important;
      max-width: 100vw !important;
    }
  }
}

.sidebar-header {
  padding: $space-md;
  border-bottom: $border-width-base $border-style-base $border-color-muted;
  display: flex;
  flex-direction: column;
  gap: $space-sm;
}

.sidebar-controls-row {
  display: flex;
  align-items: center;
  gap: $space-sm;

  .sidebar-profile-select {
    flex: 1;
    min-width: 0;
  }
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: $space-sm;
  text-decoration: none;

  img {
    width: 28px;
    height: 28px;
  }

  span {
    font-size: 18px;
    font-weight: 700;
    color: $color-text-light;
    letter-spacing: -0.3px;
  }
}

.sidebar-sessions {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sessions-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: $space-sm $space-md;
  gap: $space-sm;
}

.sessions-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: $color-text-dark;
}

.sessions-refresh-btn {
  font-size: 14px;
  color: $color-text-dark;
  transition: color 0.15s, transform 0.15s;

  &:hover { color: $color-text-light; }
  &.is-spinning i { animation: spin 0.8s linear infinite; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

// ─── Sidebar profile selector ──────────────────────────────────────────────
// Standalone .input-style select (outside .form-group context)
.sidebar-profile-select {
  position: relative;

  select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    min-height: $control-height-md;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    padding: $space-xs $space-xl $space-xs $space-md;
    border: $border-width-base $border-style-base $border-color-muted;
    border-bottom-width: $border-width-accent;
    border-bottom-color: $color-text-light;
    color: $color-text-light;
    background-color: $surface-panel-muted;
    cursor: pointer;
    transition: border-color $motion-base $motion-ease, background-color $motion-base $motion-ease;
    outline: none;

    &:hover {
      border-bottom-color: $color-text-dark;
    }

    &:focus {
      @include focus_ring;
      border-color: $color-electric-blue;
      background-color: transparent;
    }

    option {
      background: $surface-panel;
      color: $color-text-light;
    }
  }

  // Custom chevron arrow
  &::after {
    content: "";
    position: absolute;
    right: $space-md;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid $color-text-medium;
    pointer-events: none;
  }
}

// ─── Session item ──────────────────────────────────────────────────────────
.session-item {
  display: flex;
  align-items: flex-start;
  gap: $space-sm;
  padding: $space-sm $space-md;
  cursor: pointer;
  border-radius: 0;
  transition: background $motion-fast $motion-ease;
  position: relative;

  &:hover {
    background: $surface-panel-muted;

    .session-actions {
      opacity: 1;
    }
  }

  // Touch devices: always show actions
  @media (hover: none) {
    .session-actions {
      opacity: 1;
    }
  }

  &.is-active {
    background: $surface-panel-strong;
    border-left: $border-width-accent $border-style-base $color-secondary;
    padding-left: calc(#{$space-md} - #{$border-width-accent});
  }

  &.is-pinned {
    background: rgba($color-warning, 0.07);

    .session-pin-icon {
      opacity: 1;
      color: $color-warning;
    }

    .session-name {
      color: $color-warning;
    }
  }
}

.session-pin-icon {
  color: $color-text-dark;
  font-size: $icon-size-xs;
  opacity: 0;
  transition: opacity $motion-fast $motion-ease;
  flex-shrink: 0;
  margin-top: 2px;
}

.session-info {
  flex: 1;
  overflow: hidden;
}

.session-name {
  font-size: 13px;
  color: $color-text-medium;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

.session-time {
  font-size: 11px;
  color: $color-text-dark;
  line-height: 1.4;
  margin-top: 2px;
}

.session-preview {
  font-size: 12px;
  color: $color-text-light;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
  margin-top: 3px;
}

.session-actions {
  display: flex;
  gap: 2px;
  opacity: 0;
  transition: opacity $motion-fast $motion-ease;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 1px;

  .btn-icon {
    width: 26px;
    height: 26px;
    font-size: $icon-size-xs;
  }
}

// ─── Chat area (ChatArea.vue root) ─────────────────────────────────────────
.chat-area {
  flex: 1 1 0;
  min-height: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: $surface-page;
}

// ─── Chat header ───────────────────────────────────────────────────────────
.chat-header {
  display: flex;
  align-items: center;
  gap: $space-sm;
  padding: $space-sm $space-md;
  border-bottom: $border-width-base $border-style-base $border-color-muted;
  background: $surface-panel;
  flex-shrink: 0;
  min-height: 54px;
}

.chat-header-info {
  flex: 1;
  display: flex;
  align-items: center;
  gap: $space-sm;
  overflow: hidden;
  min-width: 0;

  @media (max-width: $bp-mobile) {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
}

.chat-header-title {
  font-size: 14px;
  font-weight: 600;
  color: $color-text-light;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex-shrink: 1;
  min-width: 0;
}

.btn-sidebar-toggle {
  display: none;
  @media (max-width: $bp-sidebar-drawer) {
    display: flex;
  }
}

// ─── Context bar (token indicator) ─────────────────────────────────────────
.context-bar {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  cursor: default;
}

// ─── Profile badge ─────────────────────────────────────────────────────────
.profile-badge {
  display: inline-flex;
  align-items: center;
  gap: $space-xs;
  padding: 2px $space-sm;
  background: $surface-panel-muted;
  border: $border-width-base $border-style-base $border-color-muted;
  font-size: 12px;
  color: $color-text-medium;
  white-space: nowrap;
}

// ─── Message list ──────────────────────────────────────────────────────────
.message-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: $space-lg $space-md;
  display: flex;
  flex-direction: column;
  gap: $space-md;
  min-height: 0;

  @media (max-width: $bp-mobile) {
    padding-left: 10px;
    padding-right: 10px;
  }

  // Virtual scroller overrides
  .vue-recycle-scroller {
    flex: 1;
  }
}

.message-list-inner {
  display: flex;
  flex-direction: column;
  gap: $space-xl;
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
  padding: $space-xl $space-lg;
  transition: opacity $motion-base $motion-ease;

  @media (max-width: $bp-mobile) {
    padding-left: 0;
    padding-right: 0;
  }

  &.is-hidden {
    opacity: 0;
    pointer-events: none;
  }
}

// ─── Messages ──────────────────────────────────────────────────────────────
.msg-user {
  display: flex;
  justify-content: flex-end;
  gap: $space-sm;
}

.msg-user-bubble {
  background: $color-secondary;
  color: $color-black;
  padding: $space-sm $space-md;
  font-size: 14px;
  line-height: 1.6;
  word-wrap: break-word;
  width: 100%;

  .msg-user-quote {
    margin: 0 0 $space-xs 0;
    padding: 2px 0 2px $space-sm;
    border-left: 3px solid rgba($color-black, 0.35);
    opacity: 0.7;
    font-size: 13px;
  }
}

.msg-user-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: $space-xs;
  margin-top: $space-xs;
}

.msg-user-image {
  width: 80px;
  height: 80px;
  object-fit: cover;
  cursor: pointer;
  transition: opacity 0.15s;

  &:hover {
    opacity: 0.75;
  }
}

.msg-user-file-pill {
  display: inline-flex;
  align-items: center;
  gap: $space-xs;
  padding: 2px $space-sm;
  background: rgba($color-black, 0.3);
  font-size: 12px;
}

.msg-time {
  font-size: 11px;
  color: $color-text-dark;
  line-height: 1;
  margin-top: 4px;
}

// Assistant message metadata row (elapsed · tools · tokens · time)
.msg-meta-row {
  display: flex;
  align-items: center;
  gap: $space-sm;
  margin-top: 2px;
  min-width: 0;
}

.msg-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: $color-text-dark;
  white-space: nowrap;

  i { font-size: 12px; opacity: 0.7; }
}

.msg-meta-time {
  // grouped with other meta items — no special positioning
}

.msg-user-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  max-width: 70%;

  @media (max-width: $bp-mobile) {
    max-width: 90%;
  }
}

.msg-time--user {
}

.msg-user-footer {
  display: flex;
  align-items: center;
  gap: $space-xs;
  align-self: flex-end;
}

.msg-copy-btn {
  width: 22px;
  height: 22px;
  min-width: 22px;
  padding: 0;
  font-size: 12px;
  opacity: 0.5;
  transition: opacity 0.15s;

  &:hover { opacity: 1; }
}

.msg-meta-row > .msg-copy-btn {
  margin-left: auto;
}

.msg-meta-row .msg-rate-btn {
  width: 22px;
  height: 22px;
  min-width: 22px;
  padding: 0;
  font-size: 13px;
}

.msg-assistant {
  display: flex;
  flex-direction: column;
  gap: $space-sm;
  max-width: 100%;
}

.planning-indicator {
  display: flex;
  align-items: center;
  gap: $space-sm;
  font-size: 13px;
  font-style: italic;
  color: $color-text-dark;
  padding: $space-xs 0;
}

.planning-indicator.is-executing {
  color: $color-text-medium;
  font-style: normal;
}

.planning-label {
  opacity: 0.75;
  transition: opacity 0.2s;
}

.msg-assistant-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
}

.msg-assistant-content {
  font-size: 14px;
  line-height: 1.7;
  color: $color-text-light;

  // Markdown styles
  p { margin: 0 0 $space-md; &:last-child { margin-bottom: 0; } }
  h1, h2, h3, h4 { margin: $space-lg 0 $space-sm; color: $color-text-light; }
  ul, ol { padding-left: $space-lg; margin-bottom: $space-md; }
  li { margin-bottom: $space-sm; }
  blockquote {
    margin: $space-sm 0;
    padding-left: $space-md;
    border-left: $border-width-accent $border-style-base $color-secondary;
    color: $color-text-medium;
  }
  a { color: $color-secondary; }
  strong { color: $color-text-light; }
  hr { border: none; border-top: 1px solid $border-color-muted; margin: $space-md 0; }

  // Markdown tables: scrollable wrapper for mobile
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: $space-md 0;
  }

  .table {
    margin: $space-md 0;
    thead {
      border-bottom: $border-width-base $border-style-base $color-primary;
    }
    tbody {
      tr {
        transition: background $motion-base $motion-ease;
        &:hover {
          background: rgba($color-secondary, 0.08);
          td:first-child { color: $color-secondary; }
        }
      }
    }
    tr th, tr td {
      padding: $space-sm $space-md;
      font-size: 13px;
      vertical-align: middle;
      border-bottom: $border-width-base $border-style-base rgba($color-text-light, 0.08);
    }
    tr th {
      color: $color-primary;
      background: rgba($color-text-light, 0.04);
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }
  }

  // Code inline
  :not(pre) > code {
    font-family: "IBM Plex Mono", monospace;
    font-size: 13px;
    background: $surface-panel-strong;
    padding: 1px 5px;
    color: $color-cyan;
  }

  // Code blocks — .code-block wraps header + pre
  .code-block {
    margin: $space-md 0;
    background: $surface-panel;
    border: $border-width-base $border-style-base $border-color-muted;
    overflow: hidden;

    .code-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: $space-xs $space-md;
      background: $surface-panel-strong;
      border-bottom: $border-width-base $border-style-base $border-color-muted;
      font-size: 12px;
      color: $color-text-dark;
      font-family: "IBM Plex Mono", monospace;
    }

    pre {
      margin: 0;
      background: $surface-panel !important;

      code {
        font-family: "IBM Plex Mono", monospace;
        font-size: 13px;
        display: block;
        padding: $space-md;
        overflow-x: auto;
      }
    }
  }
}

// ─── Thinking card ─────────────────────────────────────────────────────────
.thinking-card {
  margin-bottom: $space-sm;

  summary {
    list-style: none;
    display: flex;
    align-items: center;
    gap: $space-sm;
    padding: $space-sm $space-md;
    cursor: pointer;
    color: $color-text-dark;
    font-size: 13px;
    font-style: italic;
    background: $surface-panel-muted;
    border: $border-width-base $border-style-base $border-color-muted;
    transition: background $motion-fast $motion-ease;
    user-select: none;

    &::-webkit-details-marker { display: none; }
    &:hover { background: $surface-panel-strong; }
  }

  &[open] summary {
    border-bottom-color: transparent;
  }

  .thinking-chevron {
    margin-left: auto;
    font-size: $icon-size-sm;
    color: $color-text-dark;
    flex-shrink: 0;
    transition: transform $motion-fast $motion-ease;
  }

  &[open] .thinking-chevron {
    transform: rotate(180deg);
  }

  .thinking-body {
    padding: $space-md;
    font-size: 13px;
    font-style: italic;
    color: $color-text-medium;
    line-height: 1.6;
    background: $surface-panel-muted;
    border: $border-width-base $border-style-base $border-color-muted;
    border-top: none;
    white-space: pre-wrap;
  }
}

// ─── Plan card ─────────────────────────────────────────────────────────────
.plan-card {
  border: $border-width-base $border-style-base $color-info;
  border-left-width: $border-width-accent;
  border-left-color: $color-info;
  overflow: hidden;
  font-size: 13px;
  margin-bottom: $space-sm;

  summary {
    list-style: none;
    display: flex;
    align-items: center;
    gap: $space-sm;
    padding: $space-sm $space-md;
    cursor: pointer;
    background: rgba($color-info, 0.08);
    color: $color-info;
    font-size: 13px;
    user-select: none;

    &::-webkit-details-marker { display: none; }
    &:hover { background: rgba($color-info, 0.14); }

    .plan-chevron {
      margin-left: auto;
      font-size: $icon-size-sm;
      color: rgba($color-info, 0.6);
      transition: transform $motion-fast $motion-ease;
      flex-shrink: 0;
    }
  }

  &[open] .plan-chevron {
    transform: rotate(180deg);
  }

  .plan-body {
    padding: $space-md;
    font-size: 13px;
    color: $color-text-medium;
    line-height: 1.6;
    background: rgba($color-info, 0.04);
    border-top: $border-width-base $border-style-base rgba($color-info, 0.3);

    p { margin: 0 0 $space-sm; &:last-child { margin-bottom: 0; } }
    ul, ol { padding-left: $space-lg; margin-bottom: $space-sm; }
    li { margin-bottom: $space-xs; }
    strong { color: $color-text-light; }
  }
}

// ─── Tool card ─────────────────────────────────────────────────────────────
.tool-card {
  border: $border-width-base $border-style-base $border-color-muted;
  border-left-width: $border-width-accent;
  margin-bottom: $space-sm;
  border-left-color: $color-secondary;
  overflow: hidden;
  font-size: 13px;

  &.is-success { border-left-color: $color-success; }
  &.is-error   { border-left-color: $color-error; }

  summary {
    list-style: none;
    display: flex;
    align-items: center;
    gap: $space-sm;
    padding: $space-sm $space-md;
    cursor: pointer;
    background: $surface-panel-muted;
    color: $color-text-medium;
    user-select: none;

    &::-webkit-details-marker { display: none; }
    &:hover { background: $surface-panel-strong; }
  }

  .tool-name {
    flex: 1;
    font-family: "IBM Plex Mono", monospace;
    font-size: 12px;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .tool-running-time {
    font-family: "IBM Plex Mono", monospace;
    font-size: 11px;
    color: $color-text-dark;
    white-space: nowrap;
  }

  .tool-status-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: $icon-size-sm;
    height: $icon-size-sm;
    font-size: $icon-size-sm;
    flex-shrink: 0;
  }

  .tool-emoji {
    font-size: $icon-size-sm;
    line-height: 1;
    flex-shrink: 0;
  }

  .tool-chevron {
    font-size: $icon-size-sm;
    color: $color-text-dark;
    flex-shrink: 0;
    transition: transform $motion-fast $motion-ease;
  }

  &[open] .tool-chevron {
    transform: rotate(180deg);
  }
}

.tool-card-body {
  background: $surface-panel-muted;
  border-top: $border-width-base $border-style-base $border-color-muted;
}

.tool-running-banner {
  display: flex;
  align-items: center;
  gap: $space-sm;
  padding: $space-sm $space-md;
  color: $color-text-medium;
  background: rgba($color-secondary, 0.08);
  border-bottom: 1px solid $border-color-muted;
  font-size: 12px;
}

.tool-section {
  padding: $space-sm $space-md;

  & + & {
    border-top: 1px solid $border-color-muted;
  }
}

.tool-section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: $color-text-dark;
  margin-bottom: $space-xs;
}

.tool-code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  color: $color-text-medium;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 200px;
  overflow-y: auto;
}

// ─── Subagent steps ────────────────────────────────────────────────────────
.subagent-steps {
  display: flex;
  flex-direction: column;
  gap: $space-xs;
  padding: $space-xs $space-md $space-md;
  background: $surface-panel-muted;
}

.subagent-planning-indicator {
  display: flex;
  align-items: center;
  gap: $space-sm;
  padding: $space-xs $space-md;
  font-size: 12px;
  font-style: italic;
  color: $color-text-dark;
  background: $surface-panel-muted;
}

// ─── Summary / compression notice ──────────────────────────────────────────
.summary-card {
  border: $border-width-base $border-style-base $color-info;
  overflow: hidden;
  font-size: 13px;

  summary {
    list-style: none;
    display: flex;
    align-items: center;
    gap: $space-sm;
    padding: $space-sm $space-md;
    cursor: pointer;
    background: rgba($color-info, 0.08);
    color: $color-info;
    user-select: none;
    &::-webkit-details-marker { display: none; }
  }
}

.compression-notice {
  font-size: 12px;

  summary {
    list-style: none;
    text-align: center;
    padding: $space-sm;
    color: $color-text-dark;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: $space-sm;
    cursor: pointer;
    user-select: none;
    &::-webkit-details-marker { display: none; }

    &::before, &::after {
      content: '';
      flex: 1;
      height: 1px;
      background: $border-color-muted;
    }
  }

  .compression-counts {
    opacity: 0.7;
  }

  .compression-chevron {
    font-size: $icon-size-sm;
    transition: transform $motion-fast $motion-ease;
  }

  &[open] .compression-chevron {
    transform: rotate(180deg);
  }

  .compression-body {
    padding: $space-md;
    font-size: 13px;
    color: $color-text-medium;
    line-height: 1.6;
    background: $surface-panel-muted;
    border: $border-width-base $border-style-base $border-color-muted;
  }
}

// ─── Input bar ─────────────────────────────────────────────────────────────
.input-bar {
  flex-shrink: 0;
  padding: $space-sm $space-md $space-md;
  background: $surface-page;
  border-top: $border-width-base $border-style-base $border-color-muted;
}

.input-dropzone {
  position: relative;

  &.is-dragging::after {
    content: 'Drop files here';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba($color-secondary, 0.12);
    border: 2px dashed $color-secondary;
    font-size: 14px;
    color: $color-secondary;
    pointer-events: none;
    z-index: 10;
  }
}

.file-preview-strip {
  display: flex;
  flex-wrap: wrap;
  gap: $space-xs;
  margin-bottom: $space-xs;
}

.file-preview-image {
  position: relative;
  width: 60px;
  height: 60px;

  img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: $border-width-base $border-style-base $border-color-muted;
  }
}

.file-preview-pill {
  display: inline-flex;
  align-items: center;
  gap: $space-xs;
  padding: $space-xs $space-sm;
  background: $surface-panel-muted;
  border: $border-width-base $border-style-base $border-color-muted;
  font-size: 12px;
  color: $color-text-medium;
  max-width: 180px;

  span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

.file-preview-remove {
  background: none;
  border: none;
  cursor: pointer;
  color: $color-text-dark;
  padding: 0;
  display: flex;
  align-items: center;
  font-size: $icon-size-xs;
  transition: color $motion-fast $motion-ease;
  flex-shrink: 0;

  &:hover { color: $color-error; }
}

.upload-progress {
  height: 2px;
  background: $surface-panel-strong;
  margin-bottom: $space-xs;
  overflow: hidden;
}

.upload-progress-fill {
  height: 100%;
  background: $color-secondary;
  transition: width $motion-base $motion-ease;
}

.input-row {
  display: flex;
  align-items: center;
  gap: $space-sm;
  background: $surface-panel;
  border: $border-width-base $border-style-base $border-color-muted;
  padding: $space-sm;
  transition: border-color $motion-fast $motion-ease;
  max-width: 920px;
  margin: 0 auto;

  &:focus-within {
    border-color: $color-secondary;
  }
}

.input-textarea {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  resize: none;
  color: $color-text-light;
  font-size: 14px;
  line-height: 1.5;
  font-family: inherit;
  min-height: 24px;
  max-height: 144px;
  overflow-y: auto;
  padding: 2px 0;

  &::placeholder { color: $color-text-dark; }
}

// ─── Welcome screen ────────────────────────────────────────────────────────
.welcome-screen {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: $space-xl;
  gap: $space-xl;
  text-align: center;

  @media (max-width: 768px) {
    padding: 15px;
    gap: $space-md;
    justify-content: flex-start;
    padding-top: 52px;
  }
}

.welcome-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $space-sm;

  img { width: 64px; height: 64px; }

  h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: $color-text-light;
    margin: 0;
  }

  p {
    font-size: 15px;
    color: $color-text-medium;
    margin: 0;
  }

  @media (max-width: 768px) {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: $space-sm;

    img { width: 36px; height: 36px; }

    h1 { font-size: 22px; }

    p {
      font-size: 13px;
      flex-basis: 100%;
    }
  }
}

.welcome-profiles {
  display: flex;
  gap: $space-md;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 600px;

  @media (max-width: 768px) {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    width: 100%;
    max-width: 100%;
  }
}

.welcome-profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $space-sm;
  padding: $space-md;
  background: $surface-panel-muted;
  border: $border-width-base $border-style-base $border-color-muted;
  cursor: pointer;
  transition: border-color $motion-fast $motion-ease, background $motion-fast $motion-ease;
  width: 160px;
  text-align: center;

  &:hover, &.is-selected {
    border-color: $color-secondary;
    background: $surface-panel-strong;
  }

  &.is-selected {
    border-color: $color-secondary;
  }

  .profile-icon {
    font-size: $icon-size-xl;
    color: $color-secondary;
  }

  .profile-name {
    font-size: 14px;
    font-weight: 600;
    color: $color-text-light;
  }

  .profile-desc {
    font-size: 12px;
    color: $color-text-dark;
    line-height: 1.4;
  }

  @media (max-width: 768px) {
    width: auto;
    padding: 10px;
    gap: 6px;

    .profile-icon { font-size: 22px; }
    .profile-name { font-size: 13px; }
    .profile-desc {
      font-size: 11px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
  }
}

// ─── Empty state ───────────────────────────────────────────────────────────
.empty-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: $space-md;
  color: $color-text-dark;
  padding: $space-xl;

  .empty-icon {
    font-size: $icon-size-display;
    opacity: 0.4;
  }

  p {
    font-size: 15px;
    margin: 0;
  }
}

// ─── Spinner ───────────────────────────────────────────────────────────────
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid $border-color-muted;
  border-top-color: $color-secondary;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

// ─── Animations ────────────────────────────────────────────────────────────
.fade-enter-active,
.fade-leave-active {
  transition: opacity $motion-fast $motion-ease;
}
.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

.msg-enter {
  animation: msgEnter $motion-base $motion-ease both;
}

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

.slide-left-enter-active,
.slide-left-leave-active {
  transition: transform $motion-slow $motion-ease, opacity $motion-slow $motion-ease;
}
.slide-left-enter-from {
  transform: translateX(-100%);
  opacity: 0;
}
.slide-left-leave-to {
  transform: translateX(-100%);
  opacity: 0;
}

// ─── Confirm dialog transition ─────────────────────────────────────────────
.modal-enter-active,
.modal-leave-active {
  transition: opacity $motion-slow $motion-ease;

  .modal-panel {
    transition: opacity $motion-slow $motion-ease, margin-top $motion-slow $motion-ease;
  }
}

.modal-enter-from,
.modal-leave-to {
  opacity: 0;

  .modal-panel {
    opacity: 0;
    margin-top: 200px;
  }
}

// ─── UI kit overrides ──────────────────────────────────────────────────────

// Disable btn-icon icon rotation on hover — too distracting for utility buttons.
// Use .with-rotate class to opt back in where rotation makes sense.
.btn-icon:not(.with-rotate) .ph {
  transform: none !important;
  transition: none !important;
}

// Tool card chevron should still rotate (opt-in)
.tool-card[open] .tool-chevron,
.thinking-card[open] .tool-chevron {
  transform: rotate(180deg) !important;
}