/* --- Built-in fonts (SIL OFL) ------------------------------------------ */
/* Variable fonts, latin subset. Served from the embedded assets FS; only
   downloaded by the browser when a theme actually references the family. */

@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-sans-3.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-sans-3-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-serif-4.woff2") format("woff2");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-serif-4-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Source Code Pro";
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-code-pro.woff2") format("woff2");
}
@font-face {
  font-family: "Source Code Pro";
  font-style: italic;
  font-weight: 200 900;
  font-display: swap;
  src: url("fonts/source-code-pro-italic.woff2") format("woff2");
}

:root {
  --sy-bg: #ffffff;
  --sy-fg: #1f2329;
  --sy-muted: #6b7280;
  --sy-border: #e5e7eb;
  --sy-accent: #7c3aed;
  /* Alias kept for widgets that reference --sy-primary; tracks --sy-accent
     so a custom accent (set via theme override) flows through everywhere. */
  --sy-primary: var(--sy-accent);
  --sy-primary-alpha: color-mix(in srgb, var(--sy-accent) 12%, transparent);
  --sy-radius: 12px;
  /* Basic color palette (theme-overridable). The base color is used for
     badges/accents, the -bg tint for alert surfaces, the -text shade for
     text sitting on the tinted surface. */
  --sy-color-red: #dc2626;
  --sy-color-orange: #d97706;
  --sy-color-yellow: #eab308;
  --sy-color-green: #16a34a;
  --sy-color-blue: #2563eb;
  --sy-color-violet: #8b5cf6;
  --sy-color-gray: #6b7280;
  --sy-color-red-bg: color-mix(in srgb, var(--sy-color-red) 10%, var(--sy-bg));
  --sy-color-orange-bg: color-mix(in srgb, var(--sy-color-orange) 10%, var(--sy-bg));
  --sy-color-yellow-bg: color-mix(in srgb, var(--sy-color-yellow) 10%, var(--sy-bg));
  --sy-color-green-bg: color-mix(in srgb, var(--sy-color-green) 10%, var(--sy-bg));
  --sy-color-blue-bg: color-mix(in srgb, var(--sy-color-blue) 10%, var(--sy-bg));
  --sy-color-violet-bg: color-mix(in srgb, var(--sy-color-violet) 10%, var(--sy-bg));
  --sy-color-gray-bg: color-mix(in srgb, var(--sy-color-gray) 10%, var(--sy-bg));
  --sy-color-red-text: var(--sy-color-red);
  --sy-color-orange-text: var(--sy-color-orange);
  --sy-color-yellow-text: var(--sy-color-yellow);
  --sy-color-green-text: var(--sy-color-green);
  --sy-color-blue-text: var(--sy-color-blue);
  --sy-color-violet-text: var(--sy-color-violet);
  --sy-color-gray-text: var(--sy-color-gray);
  /* Status colors track the palette so palette overrides flow through. */
  --sy-info: var(--sy-color-blue);
  --sy-success: var(--sy-color-green);
  --sy-warning: var(--sy-color-orange);
  --sy-error: var(--sy-color-red);
  --sy-link: var(--sy-accent);
  --sy-sidebar-bg: #f8f9fb;
  --sy-hover: rgba(0,0,0,.04);
  --sy-font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans TC", sans-serif;
  --sy-font-heading: var(--sy-font);
  --sy-font-code: ui-monospace, "Cascadia Code", "Consolas", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sy-bg: #0f1115;
    --sy-fg: #e6e8eb;
    --sy-muted: #9ca3af;
    --sy-border: #2a2f3a;
    --sy-sidebar-bg: #161920;
    --sy-hover: rgba(255,255,255,.06);
  }
}

html[data-theme="dark"] {
  --sy-bg: #0f1115;
  --sy-fg: #e6e8eb;
  --sy-muted: #9ca3af;
  --sy-border: #2a2f3a;
  --sy-sidebar-bg: #161920;
  --sy-hover: rgba(255,255,255,.06);
}
html[data-theme="light"] {
  --sy-bg: #ffffff;
  --sy-fg: #1f2329;
  --sy-muted: #6b7280;
  --sy-border: #e5e7eb;
  --sy-sidebar-bg: #f8f9fb;
  --sy-hover: rgba(0,0,0,.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--sy-bg);
  color: var(--sy-fg);
  font-family: var(--sy-font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* --- Scrollbars ------------------------------------------------------- */
/* Themed scrollbars that blend with the surface. Firefox uses the
   standard properties; Chromium/WebKit use the ::-webkit-scrollbar
   pseudo-elements. The thumb uses a transparent border + padding-box
   clip so it reads as a thin pill on any background (page or sidebar). */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--sy-border) transparent;
}

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--sy-border);
  border-radius: 8px;
  border: 3px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--sy-muted);
  background-clip: padding-box;
}
::-webkit-scrollbar-corner {
  background: transparent;
}

/* --- Layout ------------------------------------------------------------ */

#syralit-root {
  display: flex;
  min-height: 100vh;
}

#syralit-sidebar {
  display: none;
  /* Re-applied here (not just inherited from body) so sidebar-scoped
     --sy-font overrides take effect. */
  font-family: var(--sy-font);
}

#syralit-root.has-sidebar #syralit-sidebar {
  display: flex;
  flex-direction: column;
  width: 260px;
  min-width: 260px;
  background: var(--sy-sidebar-bg);
  border-right: 1px solid var(--sy-border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

#syralit-app {
  flex: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
  width: 100%;
}

#syralit-root.has-sidebar #syralit-app {
  max-width: 820px;
  padding: 2.5rem 2.5rem 4rem;
}

/* --- Sidebar ----------------------------------------------------------- */

.sy-sidebar-header {
  padding: 1.5rem 1.25rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sy-accent);
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--sy-border);
}

.sy-sidebar-pages {
  list-style: none;
  margin: 0;
  padding: .5rem;
  flex: 1;
}

.sy-sidebar-pages li {
  margin: 2px 0;
}

.sy-sidebar-pages a {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .5rem .75rem;
  border-radius: calc(var(--sy-radius) * 0.65);
  color: var(--sy-muted);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 500;
  transition: background .15s, color .15s;
  cursor: pointer;
  user-select: none;
}

.sy-sidebar-pages a:hover {
  background: var(--sy-hover);
  color: var(--sy-fg);
}

.sy-sidebar-pages a.active {
  background: color-mix(in srgb, var(--sy-accent) 12%, transparent);
  color: var(--sy-accent);
  font-weight: 600;
}

.sy-sidebar-icon {
  font-size: 1.1rem;
  line-height: 1;
  width: 1.4rem;
  text-align: center;
  flex-shrink: 0;
}

.sy-sidebar-content {
  padding: .75rem 1rem;
  border-top: 1px solid var(--sy-border);
}

.sy-sidebar-footer {
  margin-top: auto;
  padding: .75rem 1rem;
  border-top: 1px solid var(--sy-border);
}

.sy-theme-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  font: inherit;
  font-size: 1.05rem;
  line-height: 1;
  padding: .5rem .75rem;
  background: var(--sy-bg);
  color: var(--sy-fg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.sy-theme-toggle:hover {
  background: var(--sy-hover);
  border-color: var(--sy-accent);
}

/* --- Segmented Control ------------------------------------------------- */

.sy-segmented-control {
  display: inline-flex;
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  overflow: hidden;
}

.sy-segmented-btn {
  background: transparent;
  color: var(--sy-fg);
  border: none;
  border-right: 1px solid var(--sy-border);
  padding: .4rem .9rem;
  cursor: pointer;
  font-size: .875rem;
  transition: background .15s;
}

.sy-segmented-btn:last-child { border-right: none; }

.sy-segmented-btn:hover { background: var(--sy-sidebar-bg); }

.sy-segmented-active {
  background: var(--sy-primary);
  color: #fff;
}

.sy-segmented-active:hover { background: var(--sy-primary); }

/* --- Pills ------------------------------------------------------------- */

.sy-pills {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.sy-pill {
  background: var(--sy-sidebar-bg);
  color: var(--sy-fg);
  border: 1px solid var(--sy-border);
  border-radius: 999px;
  padding: .3rem .8rem;
  cursor: pointer;
  font-size: .85rem;
  transition: background .15s, border-color .15s;
}

.sy-pill:hover {
  border-color: var(--sy-primary);
}

.sy-pill-active {
  background: var(--sy-primary);
  color: #fff;
  border-color: var(--sy-primary);
}

/* --- Page Link --------------------------------------------------------- */

.sy-page-link {
  color: var(--sy-primary);
  text-decoration: none;
  font-weight: 500;
  padding: 4px 0;
  display: inline-block;
  cursor: pointer;
}
.sy-page-link:hover {
  text-decoration: underline;
}
.sy-page-link.sy-disabled {
  color: var(--sy-muted);
  cursor: not-allowed;
}

/* --- Badge ------------------------------------------------------------- */

.sy-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 0.75em;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  vertical-align: middle;
}

/* --- Audio Input ------------------------------------------------------- */

.sy-audio-input {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* --- Feedback ---------------------------------------------------------- */

.sy-feedback {
  display: flex;
  gap: 8px;
  align-items: center;
}
.sy-feedback-btn {
  background: none;
  border: 1px solid var(--sy-border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 1.2em;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.15s, border-color 0.15s;
}
.sy-feedback-btn:hover:not(:disabled) {
  opacity: 1;
  border-color: var(--sy-primary);
}
.sy-feedback-active {
  opacity: 1;
  border-color: var(--sy-primary);
  background: var(--sy-primary-alpha, rgba(255,75,75,0.1));
}
.sy-feedback-btn:disabled {
  cursor: not-allowed;
  opacity: 0.3;
}
/* Star rating: borderless, gold when filled */
.sy-feedback-star {
  border: none;
  padding: 2px 3px;
  font-size: 1.4em;
  color: var(--sy-muted);
}
.sy-feedback-star.sy-feedback-active {
  color: #f5b301;
  opacity: 1;
}

/* --- Pagination -------------------------------------------------------- */

.sy-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: .5rem 0;
}

.sy-pagination-btn {
  background: var(--sy-primary);
  color: #fff;
  border: none;
  border-radius: var(--sy-radius);
  padding: .35rem .75rem;
  cursor: pointer;
  font-size: .9rem;
}

.sy-pagination-btn:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.sy-pagination-label {
  font-size: .9rem;
  color: var(--sy-fg);
  font-variant-numeric: tabular-nums;
}

/* --- Map --------------------------------------------------------------- */

.sy-map {
  width: 100%;
  border-radius: var(--sy-radius);
  border: 1px solid var(--sy-border);
  z-index: 0;
}

/* --- Camera Input ------------------------------------------------------ */

.sy-camera-video,
.sy-camera-preview {
  width: 100%;
  max-width: 480px;
  border-radius: var(--sy-radius);
  background: #000;
}

.sy-camera-buttons {
  display: flex;
  gap: .5rem;
  margin-top: .5rem;
}

.sy-button-secondary {
  background: var(--sy-sidebar-bg);
  color: var(--sy-fg);
  border: 1px solid var(--sy-border);
}

.sy-button-secondary:hover {
  background: var(--sy-border);
}

/* --- Searchable Select ------------------------------------------------- */

.sy-searchable-select {
  position: relative;
}

.sy-searchable-dropdown {
  position: absolute;
  z-index: 100;
  width: 100%;
  max-height: 200px;
  overflow-y: auto;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  box-shadow: 0 4px 12px rgba(0,0,0,.12);
  margin-top: 2px;
}

.sy-searchable-item {
  padding: .5rem .75rem;
  cursor: pointer;
  font-size: .875rem;
}

.sy-searchable-item:hover {
  background: var(--sy-sidebar-bg);
}

/* --- Loading State ----------------------------------------------------- */

.sy-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem;
  color: var(--sy-muted);
}

.sy-loading-spinner {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--sy-border);
  border-top-color: var(--sy-accent);
  border-radius: 50%;
  animation: sy-spin 1s linear infinite;
}

/* --- Data Editor ------------------------------------------------------- */

.sy-data-editor-input {
  width: 100%;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  padding: .25rem .4rem;
  box-sizing: border-box;
  outline: none;
}

.sy-data-editor-input:focus {
  background: var(--sy-sidebar-bg);
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px var(--sy-accent);
}

.sy-data-editor td {
  padding: 0;
}
.sy-data-editor-toolbar {
  display: flex;
  gap: 8px;
  padding: 8px 0;
}
.sy-data-editor-del {
  background: none;
  border: none;
  color: var(--sy-muted);
  cursor: pointer;
  font-size: 0.85em;
  padding: 2px 6px;
  border-radius: 4px;
}
.sy-data-editor-del:hover {
  color: #dc2626;
  background: rgba(220,38,38,0.1);
}

/* --- Status Container -------------------------------------------------- */

.sy-status-container {
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  margin: .75rem 0;
  overflow: hidden;
}

.sy-status-container-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1rem;
  background: var(--sy-sidebar-bg);
  font-weight: 600;
}

.sy-status-container-icon {
  display: flex;
  align-items: center;
  width: 1.2rem;
  height: 1.2rem;
  justify-content: center;
}

.sy-status-container-running .sy-status-container-icon { color: var(--sy-accent); }
.sy-status-container-complete .sy-status-container-icon { color: var(--sy-success); }
.sy-status-container-error .sy-status-container-icon { color: var(--sy-error); }

.sy-status-spinner {
  display: inline-block;
  width: .9rem;
  height: .9rem;
  border: 2px solid var(--sy-border);
  border-top-color: var(--sy-accent);
  border-radius: 50%;
  animation: sy-spin 1s linear infinite;
}

.sy-status-container-body {
  padding: .75rem 1rem;
}

/* --- Container --------------------------------------------------------- */

.sy-container-bordered {
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  padding: 1rem;
  margin: .75rem 0;
}

/* --- Artifact Canvas --------------------------------------------------- */

.sy-artifact-canvas {
  display: block;
  width: 100%;
  margin: .75rem 0;
  border: 1px solid color-mix(in srgb, var(--sy-border) 86%, transparent);
  border-radius: var(--sy-radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--sy-accent) 7%, transparent), transparent 34%),
    var(--sy-bg);
  overflow: hidden;
}

.sy-artifact-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  align-items: stretch;
}

.sy-artifact-item {
  min-width: 0;
  transform-origin: top left;
  will-change: opacity, transform;
}

.sy-artifact-ghost {
  position: absolute;
  z-index: 2;
  margin: 0;
  pointer-events: none;
  transform-origin: top left;
  will-change: opacity, transform;
}

@media (prefers-reduced-motion: reduce) {
  .sy-artifact-item,
  .sy-artifact-ghost {
    animation: none !important;
  }
}

/* --- Typography -------------------------------------------------------- */

.sy-title, .sy-header, .sy-subheader,
.sy-markdown h1, .sy-markdown h2, .sy-markdown h3,
.sy-markdown h4, .sy-markdown h5, .sy-markdown h6 {
  font-family: var(--sy-font-heading);
}

.sy-title {
  font-size: 1.85rem;
  font-weight: 700;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.sy-header {
  font-size: 1.35rem;
  font-weight: 650;
  margin: 1.5rem 0 .75rem;
  letter-spacing: -0.01em;
}
.sy-subheader {
  font-size: 1.08rem;
  font-weight: 600;
  margin: 1.25rem 0 .5rem;
}
.sy-text, .sy-markdown { margin: .5rem 0; }

.sy-markdown h1, .sy-markdown h2, .sy-markdown h3,
.sy-markdown h4, .sy-markdown h5, .sy-markdown h6 {
  margin: 1rem 0 .5rem;
}
.sy-markdown p { margin: .5rem 0; }
.sy-markdown ul, .sy-markdown ol { padding-left: 1.5rem; margin: .5rem 0; }
.sy-markdown blockquote {
  border-left: 3px solid var(--sy-border);
  margin: .5rem 0;
  padding: .25rem 1rem;
  color: var(--sy-muted);
}
.sy-markdown pre, .sy-markdown code {
  font-family: var(--sy-font-code);
}
.sy-markdown pre {
  background: var(--sy-sidebar-bg);
  padding: .75rem 1rem;
  border-radius: var(--sy-radius);
  overflow-x: auto;
  margin: .5rem 0;
}
.sy-markdown code {
  background: var(--sy-sidebar-bg);
  padding: .15rem .35rem;
  border-radius: 4px;
  font-size: .9em;
}
.sy-markdown pre code {
  background: none;
  padding: 0;
}
.sy-markdown a { color: var(--sy-link); text-decoration: none; }
.sy-markdown a:hover { text-decoration: underline; }
.sy-markdown img { max-width: 100%; border-radius: var(--sy-radius); }
.sy-markdown table {
  border-collapse: collapse;
  width: 100%;
  margin: .5rem 0;
}
.sy-markdown th, .sy-markdown td {
  border: 1px solid var(--sy-border);
  padding: .5rem .75rem;
  text-align: left;
}
.sy-markdown th { background: var(--sy-sidebar-bg); font-weight: 600; }
.sy-caption {
  color: var(--sy-muted);
  font-size: .85rem;
  margin: .25rem 0;
}

/* --- Status ------------------------------------------------------------ */

.sy-status {
  padding: .65rem .9rem;
  border-radius: var(--sy-radius);
  margin: .6rem 0;
  font-size: .88rem;
  font-weight: 500;
  border: 1px solid transparent;
}
.sy-status-info {
  background: var(--sy-color-blue-bg);
  border-color: color-mix(in srgb, var(--sy-info) 22%, transparent);
  color: var(--sy-color-blue-text);
}
.sy-status-success {
  background: var(--sy-color-green-bg);
  border-color: color-mix(in srgb, var(--sy-success) 22%, transparent);
  color: var(--sy-color-green-text);
}
.sy-status-warning {
  background: var(--sy-color-orange-bg);
  border-color: color-mix(in srgb, var(--sy-warning) 22%, transparent);
  color: var(--sy-color-orange-text);
}
.sy-status-error {
  background: var(--sy-color-red-bg);
  border-color: color-mix(in srgb, var(--sy-error) 22%, transparent);
  color: var(--sy-color-red-text);
}

/* --- Form Controls ----------------------------------------------------- */

.sy-field { margin: .75rem 0; }
.sy-field-inline { display: flex; align-items: center; gap: .6rem; cursor: pointer; }
.sy-label {
  display: block;
  font-size: .82rem;
  color: var(--sy-muted);
  margin-bottom: .3rem;
  font-weight: 500;
}
.sy-field-inline .sy-label {
  display: inline;
  margin: 0;
  color: var(--sy-fg);
  font-size: .9rem;
}

.sy-help {
  font-size: .78rem;
  color: var(--sy-muted);
  margin-top: .25rem;
}

.sy-input, .sy-select {
  width: 100%;
  padding: .55rem .75rem;
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  background: var(--sy-bg);
  color: var(--sy-fg);
  font: inherit;
  font-size: .93rem;
  transition: border-color .2s, box-shadow .2s;
}
.sy-input:focus, .sy-select:focus {
  outline: none;
  border-color: var(--sy-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--sy-accent) 18%, transparent);
}
.sy-input::placeholder {
  color: var(--sy-muted);
  opacity: .55;
}
.sy-input:disabled, .sy-select:disabled {
  opacity: .55;
  cursor: not-allowed;
}

.sy-textarea {
  min-height: 100px;
  resize: vertical;
}

.sy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .55rem 1.15rem;
  border: none;
  border-radius: var(--sy-btn-radius, var(--sy-radius));
  background: var(--sy-accent);
  color: #fff;
  font: inherit;
  font-size: .93rem;
  font-weight: 600;
  cursor: pointer;
  /* Right margin so adjacent inline buttons keep a gap instead of touching;
     no left margin keeps wrapped buttons aligned to the container edge. */
  margin: .5rem .55rem .5rem 0;
  transition: filter .15s, transform .1s, box-shadow .15s;
  box-shadow: 0 1px 3px rgba(0,0,0,.12);
  text-decoration: none;
}
.sy-button:hover {
  filter: brightness(1.08);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--sy-accent) 28%, transparent);
}
.sy-button:active {
  transform: translateY(1px);
  box-shadow: none;
}
.sy-button:disabled {
  opacity: .5;
  cursor: not-allowed;
  filter: none;
  box-shadow: none;
}

/* Button variants (type / full width) */
.sy-button-block { width: 100%; }
.sy-button-outline {
  background: transparent;
  color: var(--sy-accent);
  border: 1px solid var(--sy-accent);
  box-shadow: none;
}
.sy-button-outline:hover {
  background: color-mix(in srgb, var(--sy-accent) 10%, transparent);
  filter: none;
  box-shadow: none;
}
.sy-button-tertiary {
  background: transparent;
  color: var(--sy-accent);
  box-shadow: none;
  padding-left: .5rem;
  padding-right: .5rem;
}
.sy-button-tertiary:hover {
  background: var(--sy-hover);
  filter: none;
  box-shadow: none;
}

/* Exception box (sy.Exception) */
.sy-exception {
  margin: .6rem 0;
  border: 1px solid color-mix(in srgb, var(--sy-error) 45%, var(--sy-border));
  border-left: 3px solid var(--sy-error);
  border-radius: var(--sy-radius);
  background: color-mix(in srgb, var(--sy-error) 8%, transparent);
  overflow: hidden;
}
.sy-exception-head {
  padding: .5rem .8rem;
  font-weight: 600;
  font-size: .9rem;
  color: var(--sy-error);
}
.sy-exception-body {
  margin: 0;
  padding: 0 .8rem .7rem;
  font-family: var(--sy-font-code);
  font-size: .85rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--sy-fg);
}

.sy-checkbox {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--sy-accent);
  cursor: pointer;
}

/* --- Number Input / Slider --------------------------------------------- */

.sy-slider-wrap {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.sy-slider {
  flex: 1;
  height: 6px;
  accent-color: var(--sy-accent);
  cursor: pointer;
}

.sy-slider-value {
  min-width: 3rem;
  text-align: right;
  font-size: .88rem;
  font-weight: 600;
  color: var(--sy-fg);
  font-variant-numeric: tabular-nums;
}

/* --- Range Slider (dual handle) ---------------------------------------- */

.sy-range-row {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.sy-range-slider {
  position: relative;
  flex: 1;
  height: 24px;
}

.sy-range-track {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 6px;
  transform: translateY(-50%);
  background: var(--sy-border);
  border-radius: 3px;
}

.sy-range-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--sy-accent);
  border-radius: 3px;
}

/* Two range inputs are stacked on top of the track; only their thumbs accept
   pointer events, so each handle is independently draggable. */
.sy-range-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 24px;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  pointer-events: none;
}
.sy-range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  pointer-events: auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--sy-accent);
  border: 2px solid var(--sy-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
  cursor: pointer;
}
.sy-range-input::-moz-range-thumb {
  pointer-events: auto;
  width: 18px;
  height: 18px;
  border: 2px solid var(--sy-bg);
  border-radius: 50%;
  background: var(--sy-accent);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
  cursor: pointer;
}
.sy-range-input::-moz-range-track {
  background: transparent;
}
.sy-range-input:disabled::-webkit-slider-thumb { cursor: not-allowed; opacity: .5; }

/* --- Date Range -------------------------------------------------------- */

.sy-date-range {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.sy-date-range .sy-input {
  flex: 1;
  width: auto;
}
.sy-date-range-sep {
  color: var(--sy-muted);
}

/* --- Radio ------------------------------------------------------------- */

.sy-radio-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.sy-radio-label {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  cursor: pointer;
  padding: .2rem 0;
}

.sy-radio {
  width: 1rem;
  height: 1rem;
  accent-color: var(--sy-accent);
  cursor: pointer;
}

/* --- MultiSelect ------------------------------------------------------- */

.sy-multi-select-wrap {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.sy-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
}

.sy-chip {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .25rem .6rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--sy-accent) 12%, transparent);
  color: var(--sy-accent);
  font-size: .82rem;
  font-weight: 500;
}

.sy-chip-x {
  cursor: pointer;
  font-size: .9rem;
  line-height: 1;
  opacity: .6;
  transition: opacity .15s;
}
.sy-chip-x:hover { opacity: 1; }

.sy-multi-add {
  width: auto;
  max-width: 200px;
}

/* --- Color Picker ------------------------------------------------------ */

.sy-color-wrap {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.sy-color-picker {
  width: 44px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--sy-border);
  border-radius: calc(var(--sy-radius) * 0.6);
  background: var(--sy-bg);
  cursor: pointer;
}

.sy-color-hex {
  font-family: var(--sy-font-code);
  font-size: .85rem;
  color: var(--sy-muted);
}

/* --- Toggle (Switch) --------------------------------------------------- */

.sy-toggle-wrap {
  flex-wrap: wrap;
}

.sy-toggle {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
}

.sy-toggle-input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.sy-toggle-knob {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--sy-border);
  border-radius: 999px;
  transition: background .2s;
}
.sy-toggle-knob::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform .2s;
  box-shadow: 0 1px 3px rgba(0,0,0,.15);
}

.sy-toggle-input:checked + .sy-toggle-knob {
  background: var(--sy-accent);
}
.sy-toggle-input:checked + .sy-toggle-knob::before {
  transform: translateX(18px);
}
.sy-toggle-input:disabled + .sy-toggle-knob {
  opacity: .5;
  cursor: not-allowed;
}

/* --- Layout: Columns --------------------------------------------------- */

.sy-columns {
  display: grid;
  gap: 1.25rem;
  margin: .75rem 0;
}

.sy-column {
  min-width: 0;
}
.sy-columns-bordered > .sy-column {
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  padding: 1rem;
}

/* --- Layout: Expander -------------------------------------------------- */

.sy-expander {
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  margin: .75rem 0;
  overflow: hidden;
}

.sy-expander-summary {
  padding: .65rem .9rem;
  font-weight: 600;
  font-size: .93rem;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: .5rem;
  transition: background .15s;
}
.sy-expander-summary:hover {
  background: var(--sy-hover);
}
.sy-expander-summary::before {
  content: "▸";
  font-size: .75rem;
  transition: transform .2s;
  color: var(--sy-muted);
}
.sy-expander[open] > .sy-expander-summary::before {
  transform: rotate(90deg);
}
.sy-expander-summary::-webkit-details-marker { display: none; }

.sy-expander-content {
  padding: .5rem .9rem .9rem;
  border-top: 1px solid var(--sy-border);
}

/* --- Layout: Tabs ------------------------------------------------------ */

.sy-tabs {
  margin: .75rem 0;
}

.sy-tabs-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--sy-border);
  overflow-x: auto;
  /* Only ever scroll horizontally. Without this, overflow-x:auto makes
     overflow-y compute to auto too, and the tabs' -2px bottom margin plus the
     reserved horizontal scrollbar height triggered a stray vertical scrollbar. */
  overflow-y: hidden;
}

.sy-tab-button {
  padding: .55rem 1rem;
  border: none;
  background: none;
  color: var(--sy-muted);
  font: inherit;
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.sy-tab-button:hover {
  color: var(--sy-fg);
}
.sy-tab-button.active {
  color: var(--sy-accent);
  border-bottom-color: var(--sy-accent);
  font-weight: 600;
}

.sy-tabs-panels {
  padding: .75rem 0;
}

.sy-tab-panel {
  animation: sy-fade-in .15s ease;
}

@keyframes sy-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* --- Layout: Form ------------------------------------------------------ */

.sy-form {
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  padding: 1rem;
  margin: .75rem 0;
}

.sy-form-submit {
  margin-top: .5rem;
}

/* --- Display: Table ---------------------------------------------------- */

.sy-table {
  width: 100%;
  border-collapse: collapse;
  margin: .75rem 0;
  font-size: .9rem;
}

.sy-table th, .sy-table td {
  padding: .5rem .75rem;
  text-align: left;
  border-bottom: 1px solid var(--sy-df-border, var(--sy-border));
}

.sy-table th {
  font-weight: 600;
  font-size: .82rem;
  color: var(--sy-muted);
  /* No text-transform: headers must show the column's true casing — data
     tooling (e.g. CCL formulas) matches names case-sensitively. */
  letter-spacing: .02em;
  background: var(--sy-df-header-bg, var(--sy-hover));
}

.sy-table tbody tr:hover {
  background: var(--sy-hover);
}

/* --- Display: Metric --------------------------------------------------- */

.sy-metric {
  padding: .75rem 0;
  margin: .5rem 0;
}
.sy-metric-bordered {
  padding: 1rem 1.1rem;
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
}

.sy-metric-label {
  font-size: .82rem;
  font-weight: 500;
  color: var(--sy-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  margin-bottom: .15rem;
}

.sy-metric-value {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.sy-metric-delta {
  font-size: .88rem;
  font-weight: 500;
  margin-top: .2rem;
  color: var(--sy-muted);
}
.sy-delta-positive { color: var(--sy-success); }
.sy-delta-negative { color: var(--sy-error); }

/* --- Display: Code ----------------------------------------------------- */

.sy-code-wrap {
  position: relative;
  margin: .75rem 0;
}

.sy-code {
  background: var(--sy-hover);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  padding: .85rem 1rem;
  margin: 0;
  overflow-x: auto;
  font-family: var(--sy-font-code);
  font-size: .85rem;
  line-height: 1.5;
}

.sy-code code {
  font: inherit;
}
.sy-code-wrapped {
  white-space: pre-wrap;
  word-break: break-word;
}
/* Line-number gutter (sy.LineNumbers) — line-height/padding mirror .sy-code */
.sy-code-row {
  display: flex;
  align-items: stretch;
}
.sy-code-row .sy-code {
  flex: 1;
  border-left: none;
  border-radius: 0 var(--sy-radius) var(--sy-radius) 0;
}
.sy-code-gutter {
  display: flex;
  flex-direction: column;
  padding: .85rem .6rem;
  background: var(--sy-hover);
  border: 1px solid var(--sy-border);
  border-right: none;
  border-radius: var(--sy-radius) 0 0 var(--sy-radius);
  font-family: var(--sy-font-code);
  font-size: .85rem;
  line-height: 1.5;
  color: var(--sy-muted);
  text-align: right;
  user-select: none;
}
.sy-chat-avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

/* --- JSON tree (sy.JSON) ---------------------------------------------- */
.sy-json {
  margin: .75rem 0;
  padding: .75rem 1rem;
  background: var(--sy-hover);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  font-family: var(--sy-font-code);
  font-size: .85rem;
  line-height: 1.55;
  overflow-x: auto;
}
.sy-json-children { padding-left: 1.25rem; }
.sy-json-head { cursor: pointer; user-select: none; white-space: nowrap; }
.sy-json-toggle { display: inline-block; width: 1em; color: var(--sy-muted); }
.sy-json-key { color: var(--sy-accent); }
.sy-json-str { color: var(--sy-success); }
.sy-json-num { color: var(--sy-info); }
.sy-json-bool { color: var(--sy-warning); }
.sy-json-null { color: var(--sy-muted); }
.sy-json-punct { color: var(--sy-muted); }
.sy-json-count { color: var(--sy-muted); font-style: italic; margin-left: .35rem; font-size: .8em; }
.sy-json-tail { padding-left: 0; }
.sy-json-row { white-space: nowrap; }

.sy-code-copy {
  position: absolute;
  top: .5rem;
  right: .5rem;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: 6px;
  padding: .2rem .6rem;
  font-size: .75rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s;
  color: var(--sy-fg);
}
.sy-code-wrap:hover .sy-code-copy { opacity: 1; }

/* --- Display: Image ---------------------------------------------------- */

.sy-image-wrap {
  margin: .75rem 0;
}

.sy-image {
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--sy-radius) * 0.6);
}

/* --- Display: Progress ------------------------------------------------- */

.sy-progress-wrap {
  margin: .75rem 0;
}

.sy-progress-text {
  font-size: .85rem;
  color: var(--sy-fg);
  margin-bottom: .35rem;
}
.sy-progress-bar {
  height: 8px;
  background: var(--sy-border);
  border-radius: 999px;
  overflow: hidden;
}

.sy-progress-fill {
  height: 100%;
  background: var(--sy-accent);
  border-radius: 999px;
  transition: width .3s ease;
}
/* progress bar rendered inside a table cell (DataFrame/DataEditor) */
.sy-progress-cell {
  min-width: 80px;
  display: inline-block;
  vertical-align: middle;
}
.sy-progress-label {
  margin-left: .5rem;
  font-size: .8rem;
  color: var(--sy-muted);
  font-variant-numeric: tabular-nums;
}
/* inline mini chart cells (bar_chart / line_chart column types) */
.sy-spark {
  display: block;
}

/* --- Display: Link ----------------------------------------------------- */

.sy-link {
  color: var(--sy-link);
  text-decoration: none;
  font-weight: 500;
}
.sy-link:hover {
  text-decoration: underline;
}

.sy-link-btn {
  display: inline-block;
  text-align: center;
  text-decoration: none !important;
}

/* --- Select Slider ----------------------------------------------------- */

.sy-select-slider {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.sy-select-slider .sy-slider-input {
  flex: 1;
}
.sy-select-slider-value {
  font-weight: 600;
  min-width: 3rem;
  text-align: right;
}

/* --- Display: Divider -------------------------------------------------- */

.sy-divider {
  border: none;
  border-top: 1px solid var(--sy-border);
  margin: 1.25rem 0;
}

/* --- Download Button --------------------------------------------------- */

.sy-download-button {
  text-decoration: none;
}

/* --- File Uploader ----------------------------------------------------- */

.sy-file-uploader-wrap {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.sy-file-input {
  font: inherit;
  font-size: .9rem;
  cursor: pointer;
}
.sy-file-input::file-selector-button {
  padding: .4rem .8rem;
  border: 1px solid var(--sy-border);
  border-radius: calc(var(--sy-radius) * 0.6);
  background: var(--sy-bg);
  color: var(--sy-fg);
  font: inherit;
  font-size: .85rem;
  cursor: pointer;
  margin-right: .6rem;
  transition: background .15s;
}
.sy-file-input::file-selector-button:hover {
  background: var(--sy-hover);
}

.sy-file-info {
  font-size: .88rem;
  color: var(--sy-fg);
  padding: .3rem .5rem;
  background: var(--sy-hover);
  border-radius: calc(var(--sy-radius) * 0.5);
}

/* --- Charts ------------------------------------------------------------ */

.sy-chart-wrap {
  margin: .75rem 0;
}

.sy-chart {
  display: block;
}

.sy-chart-empty {
  padding: 2rem;
  text-align: center;
  color: var(--sy-muted);
  font-size: .9rem;
}

.sy-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: .5rem;
  padding-left: .25rem;
}

.sy-legend-item {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .82rem;
  color: var(--sy-muted);
}

.sy-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* --- External charting libraries --------------------------------------- */

.sy-vega-chart,
.sy-plotly-chart,
.sy-bokeh-chart,
.sy-pyplot-chart,
.sy-pydeck-chart {
  margin: .75rem 0;
  min-height: 200px;
}
.sy-pydeck-chart {
  position: relative;
  border-radius: var(--sy-radius);
  overflow: hidden;
}
.sy-pyplot-chart img {
  max-width: 100%;
  height: auto;
}

/* --- Audio / Video ----------------------------------------------------- */

.sy-audio {
  width: 100%;
  margin: .5rem 0;
}

.sy-video-wrap {
  margin: .75rem 0;
}

.sy-video {
  max-width: 100%;
  height: auto;
  border-radius: calc(var(--sy-radius) * 0.6);
}

/* --- Toast Notifications ----------------------------------------------- */

.sy-toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9000;
  display: flex;
  flex-direction: column-reverse;
  gap: .5rem;
  pointer-events: none;
}

.sy-toast {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1rem;
  border-radius: var(--sy-radius);
  font-size: .88rem;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
  transform: translateX(100%);
  opacity: 0;
  transition: transform .3s ease, opacity .3s ease;
  pointer-events: auto;
  max-width: 380px;
}
.sy-toast-icon { font-size: 1.1em; line-height: 1; }
.sy-toast-show {
  transform: translateX(0);
  opacity: 1;
}
.sy-toast-hide {
  transform: translateX(100%);
  opacity: 0;
}

.sy-toast-info {
  background: var(--sy-info);
  color: #fff;
}
.sy-toast-success {
  background: var(--sy-success);
  color: #fff;
}
.sy-toast-warning {
  background: var(--sy-warning);
  color: #fff;
}
.sy-toast-error {
  background: var(--sy-error);
  color: #fff;
}

/* --- Balloons & Snow --------------------------------------------------- */

.sy-balloon {
  position: fixed;
  bottom: -40px;
  border-radius: 50%;
  z-index: 9500;
  pointer-events: none;
  animation: sy-balloon-rise linear forwards;
}

@keyframes sy-balloon-rise {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(-110vh) rotate(360deg); opacity: 0; }
}

.sy-snowflake {
  position: fixed;
  top: -30px;
  z-index: 9500;
  pointer-events: none;
  animation: sy-snow-fall linear forwards;
}

@keyframes sy-snow-fall {
  0%   { transform: translateY(0) translateX(0); }
  100% { transform: translateY(110vh) translateX(30px); }
}

/* --- DataFrame (sortable) ---------------------------------------------- */

.sy-dataframe-wrap {
  margin: .75rem 0;
  border: 1px solid var(--sy-df-border, var(--sy-border));
  border-radius: var(--sy-radius);
  overflow: hidden;
}

.sy-dataframe {
  margin: 0;
  border: none;
}

.sy-df-header {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background .15s;
}
.sy-df-header:hover {
  background: color-mix(in srgb, var(--sy-accent) 8%, transparent);
}

/* Row selection */
.sy-df-select {
  width: 1px;
  text-align: center;
  cursor: pointer;
  padding-right: .5rem;
}
.sy-dataframe tbody tr.sy-df-row-selected {
  background: color-mix(in srgb, var(--sy-accent) 12%, transparent);
}
.sy-dataframe tbody tr:hover {
  background: color-mix(in srgb, var(--sy-accent) 6%, transparent);
}

/* --- Dialog (Modal) ---------------------------------------------------- */

.sy-dialog-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,.45);
  align-items: center;
  justify-content: center;
}
.sy-dialog-backdrop.sy-dialog-open {
  display: flex;
}

.sy-dialog {
  background: var(--sy-bg);
  border-radius: var(--sy-radius);
  box-shadow: 0 16px 48px rgba(0,0,0,.25);
  max-width: 560px;
  width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  animation: sy-fade-in .2s ease;
}

.sy-dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--sy-border);
}

.sy-dialog-title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 650;
}

.sy-dialog-close {
  border: none;
  background: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--sy-muted);
  line-height: 1;
  padding: .2rem .4rem;
  transition: color .15s;
}
.sy-dialog-close:hover { color: var(--sy-fg); }

.sy-dialog-body {
  padding: 1.25rem;
}

/* --- LaTeX ------------------------------------------------------------- */

.sy-latex {
  margin: .75rem 0;
  padding: .5rem 0;
  text-align: center;
  overflow-x: auto;
}

/* --- Sidebar Logo ------------------------------------------------------ */

.sy-sidebar-logo {
  display: block;
  max-width: 100%;
  height: auto;
  max-height: 50px;
  margin-bottom: .5rem;
}

/* --- Chat Interface ---------------------------------------------------- */

.sy-chat-message {
  display: flex;
  gap: .75rem;
  padding: .75rem 0;
}

.sy-chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  background: var(--sy-hover);
}

.sy-chat-content {
  flex: 1;
  min-width: 0;
}

.sy-chat-user .sy-chat-avatar { background: color-mix(in srgb, var(--sy-accent) 15%, transparent); }
.sy-chat-assistant .sy-chat-avatar { background: color-mix(in srgb, var(--sy-success) 15%, transparent); }

.sy-chat-input-wrap {
  display: flex;
  gap: .5rem;
  padding: .75rem 0;
  position: sticky;
  bottom: 0;
  background: var(--sy-bg);
  border-top: 1px solid var(--sy-border);
  margin-top: auto;
}

.sy-chat-input {
  flex: 1;
  padding: .6rem .85rem;
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  background: var(--sy-bg);
  color: var(--sy-fg);
  font: inherit;
  font-size: .93rem;
}
.sy-chat-input:focus {
  outline: none;
  border-color: var(--sy-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--sy-accent) 18%, transparent);
}

.sy-chat-send {
  padding: .55rem .85rem;
  border: none;
  border-radius: var(--sy-radius);
  background: var(--sy-accent);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  transition: filter .15s;
}
.sy-chat-send:hover { filter: brightness(1.1); }

/* --- Spinner ----------------------------------------------------------- */

.sy-spinner-wrap {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem 0;
  color: var(--sy-muted);
}

.sy-spinner {
  width: 20px;
  height: 20px;
  border: 3px solid var(--sy-border);
  border-top-color: var(--sy-accent);
  border-radius: 50%;
  animation: sy-spin .8s linear infinite;
  flex-shrink: 0;
}

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

.sy-spinner-text {
  font-size: .88rem;
}

/* --- Popover ----------------------------------------------------------- */

.sy-popover-wrap {
  position: relative;
  display: inline-block;
  margin: .5rem 0;
}

.sy-popover-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 500;
  min-width: 240px;
  max-width: 400px;
  padding: 1rem;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  box-shadow: 0 8px 30px rgba(0,0,0,.16);
  animation: sy-fade-in .15s ease;
}

/* --- Collapsed sidebar (initial_sidebar_state) -------------------------- */

#syralit-root.has-sidebar.sidebar-collapsed #syralit-sidebar {
  display: none;
}
#syralit-root.has-sidebar.sidebar-collapsed .sy-sidebar-toggle {
  display: flex;
}

/* --- App menu (ConfigMenuItems) ----------------------------------------- */

.sy-app-menu {
  position: fixed;
  top: .9rem;
  right: .9rem;
  z-index: 300;
}
.sy-app-menu-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--sy-border);
  border-radius: 50%;
  background: var(--sy-bg);
  color: var(--sy-muted);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}
.sy-app-menu-btn:hover { color: var(--sy-fg); }
.sy-app-menu-dropdown {
  display: none;
  position: absolute;
  right: 0;
  top: 40px;
  min-width: 160px;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  box-shadow: 0 6px 24px rgba(0,0,0,.14);
  padding: .35rem;
  flex-direction: column;
}
.sy-app-menu-dropdown.open { display: flex; }
.sy-app-menu-item {
  display: block;
  padding: .45rem .7rem;
  border: none;
  border-radius: calc(var(--sy-radius) - 4px);
  background: none;
  color: var(--sy-fg);
  font: inherit;
  font-size: .9rem;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
.sy-app-menu-item:hover { background: var(--sy-hover); }
.sy-app-about-overlay {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: rgba(0,0,0,.4);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sy-app-about-box {
  max-width: 480px;
  max-height: 70vh;
  overflow-y: auto;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  padding: 1.25rem 1.5rem;
  box-shadow: 0 12px 48px rgba(0,0,0,.25);
}

/* --- Bottom bar (sy.Bottom) ---------------------------------------------- */

.sy-bottom {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 150;
  background: var(--sy-bg);
  border-top: 1px solid var(--sy-border);
  padding: .75rem 2rem;
}
#syralit-root.has-sidebar .sy-bottom {
  left: 260px;
}
@media (max-width: 768px) {
  #syralit-root.has-sidebar .sy-bottom { left: 0; }
}
#syralit-root.has-sidebar.sidebar-collapsed .sy-bottom { left: 0; }
.sy-bottom > * { max-width: 760px; margin-left: auto; margin-right: auto; }

/* --- Menu button (sy.MenuButton) ----------------------------------------- */

.sy-menu-button-wrap {
  position: relative;
  display: inline-block;
}
.sy-menu-button-dropdown {
  display: none;
  position: absolute;
  left: 0;
  top: calc(100% + 4px);
  min-width: 160px;
  z-index: 250;
  background: var(--sy-bg);
  border: 1px solid var(--sy-border);
  border-radius: var(--sy-radius);
  box-shadow: 0 6px 24px rgba(0,0,0,.14);
  padding: .35rem;
  flex-direction: column;
}
.sy-menu-button-dropdown.open { display: flex; }

/* --- Monospace / formula inputs ------------------------------------------- */

.sy-input-mono {
  font-family: var(--sy-font-code);
  font-size: .88rem;
}

/* Formula-bar look (sy.Formula): fx marker + code surface, clearly distinct
   from ordinary text inputs. */
.sy-formula-input {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: 0 .75rem;
  border: 1px solid var(--sy-border);
  border-left: 3px solid var(--sy-accent);
  border-radius: var(--sy-radius);
  background: var(--sy-sidebar-bg);
  transition: border-color .2s, box-shadow .2s;
}
.sy-formula-input:focus-within {
  border-color: var(--sy-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--sy-accent) 18%, transparent);
}
.sy-formula-fx {
  color: var(--sy-accent);
  font-family: var(--sy-font-code);
  font-style: italic;
  font-weight: 700;
  font-size: .9rem;
  user-select: none;
}
.sy-formula-input .sy-formula-field {
  border: none;
  background: transparent;
  box-shadow: none;
  padding-left: 0;
  padding-right: 0;
}
.sy-formula-input .sy-formula-field:focus {
  border: none;
  box-shadow: none;
  outline: none;
}

/* --- Chart range selection ------------------------------------------------ */

.sy-chart-wrap { position: relative; }
.sy-chart-range-overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  background: color-mix(in srgb, var(--sy-accent) 15%, transparent);
  border-left: 1px solid var(--sy-accent);
  border-right: 1px solid var(--sy-accent);
  pointer-events: none;
}

/* --- Dataframe column selection ------------------------------------------ */

.sy-df-col-selected {
  background: color-mix(in srgb, var(--sy-accent) 10%, transparent) !important;
}
th.sy-df-col-selected {
  color: var(--sy-accent);
}

/* --- Multi-select free entry -------------------------------------------- */

.sy-multi-new {
  margin-top: .4rem;
}

/* --- Mobile Sidebar ---------------------------------------------------- */

.sy-sidebar-toggle {
  display: none;
  position: fixed;
  bottom: 1.2rem;
  left: 1.2rem;
  z-index: 200;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--sy-accent);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,0,0,.22);
  transition: transform .2s;
  align-items: center;
  justify-content: center;
}
.sy-sidebar-toggle:active { transform: scale(.92); }

.sy-sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.35);
  z-index: 99;
}
#syralit-root.has-sidebar.sidebar-open .sy-sidebar-backdrop {
  display: block;
}

@media (max-width: 768px) {
  #syralit-root.has-sidebar #syralit-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transform: translateX(-100%);
    transition: transform .25s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,.12);
  }
  #syralit-root.has-sidebar.sidebar-open #syralit-sidebar {
    transform: translateX(0);
  }
  #syralit-root.has-sidebar .sy-sidebar-toggle {
    display: flex;
  }
  #syralit-root.has-sidebar #syralit-app {
    padding: 2rem 1.25rem 5rem;
  }
  .sy-columns {
    grid-template-columns: 1fr !important;
  }
  .sy-artifact-grid {
    grid-template-columns: minmax(0, 1fr) !important;
  }
  .sy-artifact-item {
    grid-column: 1 / -1 !important;
  }
}

/* --- Dev hot reload UI ------------------------------------------------- */

.sy-dev-badge {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9998;
  padding: .4rem .8rem;
  border-radius: 999px;
  background: var(--sy-accent);
  color: #fff;
  font-size: .78rem;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.sy-dev-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(10, 12, 16, .93);
  color: #f5f5f5;
  padding: 2.5rem;
  overflow: auto;
  font-family: var(--sy-font-code);
}
.sy-dev-overlay-title {
  color: #ff6b6b;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.sy-dev-overlay-body {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: .85rem;
  line-height: 1.5;
  margin: 0;
}