:root {
  --brand: #4f46e5;
  --brand-dark: #4338ca;
  --ink: #0f172a;
  --muted: #64748b;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.font-display {
  font-family: "Georgia", "Times New Roman", serif;
  letter-spacing: -0.01em;
}

.prose-lesson {
  line-height: 1.75;
  color: #1e293b;
}

.prose-lesson h2,
.prose-lesson h3,
.prose-lesson h4 {
  color: var(--ink);
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.prose-lesson h2 {
  font-size: 1.25rem;
}

.prose-lesson h3 {
  font-size: 1.1rem;
}

.prose-lesson p {
  margin-bottom: 1rem;
}

.prose-lesson ul,
.prose-lesson ol {
  margin: 0 0 1rem 1.25rem;
}

.prose-lesson ul {
  list-style: disc;
}

.prose-lesson ol {
  list-style: decimal;
}

.prose-lesson li {
  margin-bottom: 0.35rem;
}

.prose-lesson a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose-lesson blockquote {
  border-left: 4px solid #c7d2fe;
  background: #eef2ff;
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  border-radius: 0 0.5rem 0.5rem 0;
  color: #3730a3;
}

.prose-lesson code {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 0.35rem;
  padding: 0.1rem 0.35rem;
  font-size: 0.85em;
}

.prose-lesson pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 1rem;
  border-radius: 0.75rem;
  overflow-x: auto;
  margin: 1rem 0;
  font-size: 0.85rem;
  line-height: 1.6;
}

.prose-lesson pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.prose-lesson table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.prose-lesson th,
.prose-lesson td {
  border: 1px solid #e2e8f0;
  padding: 0.5rem 0.75rem;
  text-align: left;
}

.prose-lesson th {
  background: #f8fafc;
  font-weight: 600;
}

.prose-lesson img {
  max-width: 100%;
  border-radius: 0.75rem;
  margin: 1rem 0;
}

.prose-lesson hr {
  border: 0;
  border-top: 1px solid #e2e8f0;
  margin: 1.5rem 0;
}

.lab-console {
  background: #0b1120;
  color: #e2e8f0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  border-radius: 0.75rem;
  padding: 0.9rem;
  min-height: 3rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.lab-console .lab-error {
  color: #fda4af;
}

.lab-outputs img {
  max-width: 100%;
  border-radius: 0.5rem;
  background: #fff;
  border: 1px solid #e2e8f0;
}

.lab-editor {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  tab-size: 4;
}

[x-cloak] {
  display: none !important;
}

.CodeMirror {
  height: auto;
  min-height: 11rem;
  border-radius: 0.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  padding: 0.35rem 0;
}

.CodeMirror-scroll {
  min-height: 11rem;
}

.CodeMirror-linenumber {
  color: #6b7280;
}

.CodeMirror-gutters {
  border-right: 1px solid #1f2937;
}

.CodeMirror-hints {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  max-height: 18rem;
  z-index: 50;
}

.CodeMirror-hint-active {
  background: #4f46e5;
  color: #fff;
}

.htmx-indicator {
  opacity: 0;
  transition: opacity 150ms ease-in;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  opacity: 1;
}

.activity-cell {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 0.2rem;
  background: #e2e8f0;
}

.activity-cell[data-level="1"] { background: #c7d2fe; }
.activity-cell[data-level="2"] { background: #a5b4fc; }
.activity-cell[data-level="3"] { background: #818cf8; }
.activity-cell[data-level="4"] { background: #4f46e5; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}
pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #49483e }
.highlight .c { color: #959077 } /* Comment */
.highlight .err { color: #ED007E; background-color: #1E0010 } /* Error */
.highlight .esc { color: #F8F8F2 } /* Escape */
.highlight .g { color: #F8F8F2 } /* Generic */
.highlight .k { color: #66D9EF } /* Keyword */
.highlight .l { color: #AE81FF } /* Literal */
.highlight .n { color: #F8F8F2 } /* Name */
.highlight .o { color: #FF4689 } /* Operator */
.highlight .x { color: #F8F8F2 } /* Other */
.highlight .p { color: #F8F8F2 } /* Punctuation */
.highlight .ch { color: #959077 } /* Comment.Hashbang */
.highlight .cm { color: #959077 } /* Comment.Multiline */
.highlight .cp { color: #959077 } /* Comment.Preproc */
.highlight .cpf { color: #959077 } /* Comment.PreprocFile */
.highlight .c1 { color: #959077 } /* Comment.Single */
.highlight .cs { color: #959077 } /* Comment.Special */
.highlight .gd { color: #FF4689 } /* Generic.Deleted */
.highlight .ge { color: #F8F8F2; font-style: italic } /* Generic.Emph */
.highlight .ges { color: #F8F8F2; font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #FF4689 } /* Generic.Error */
.highlight .gh { color: #F8F8F2 } /* Generic.Heading */
.highlight .gi { color: #A6E22E } /* Generic.Inserted */
.highlight .go { color: #66D9EF } /* Generic.Output */
.highlight .gp { color: #FF4689; font-weight: bold } /* Generic.Prompt */
.highlight .gs { color: #F8F8F2; font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #959077 } /* Generic.Subheading */
.highlight .gt { color: #66D9EF } /* Generic.Traceback */
.highlight .kc { color: #66D9EF } /* Keyword.Constant */
.highlight .kd { color: #66D9EF } /* Keyword.Declaration */
.highlight .kn { color: #FF4689 } /* Keyword.Namespace */
.highlight .kp { color: #66D9EF } /* Keyword.Pseudo */
.highlight .kr { color: #66D9EF } /* Keyword.Reserved */
.highlight .kt { color: #66D9EF } /* Keyword.Type */
.highlight .ld { color: #E6DB74 } /* Literal.Date */
.highlight .m { color: #AE81FF } /* Literal.Number */
.highlight .s { color: #E6DB74 } /* Literal.String */
.highlight .na { color: #A6E22E } /* Name.Attribute */
.highlight .nb { color: #A6E22E } /* Name.Builtin */
.highlight .nc { color: #A6E22E } /* Name.Class */
.highlight .no { color: #66D9EF } /* Name.Constant */
.highlight .nd { color: #A6E22E } /* Name.Decorator */
.highlight .ni { color: #F8F8F2 } /* Name.Entity */
.highlight .ne { color: #A6E22E } /* Name.Exception */
.highlight .nf { color: #A6E22E } /* Name.Function */
.highlight .nl { color: #F8F8F2 } /* Name.Label */
.highlight .nn { color: #F8F8F2 } /* Name.Namespace */
.highlight .nx { color: #A6E22E } /* Name.Other */
.highlight .py { color: #F8F8F2 } /* Name.Property */
.highlight .nt { color: #FF4689 } /* Name.Tag */
.highlight .nv { color: #F8F8F2 } /* Name.Variable */
.highlight .ow { color: #FF4689 } /* Operator.Word */
.highlight .pm { color: #F8F8F2 } /* Punctuation.Marker */
.highlight .w { color: #F8F8F2 } /* Text.Whitespace */
.highlight .mb { color: #AE81FF } /* Literal.Number.Bin */
.highlight .mf { color: #AE81FF } /* Literal.Number.Float */
.highlight .mh { color: #AE81FF } /* Literal.Number.Hex */
.highlight .mi { color: #AE81FF } /* Literal.Number.Integer */
.highlight .mo { color: #AE81FF } /* Literal.Number.Oct */
.highlight .sa { color: #E6DB74 } /* Literal.String.Affix */
.highlight .sb { color: #E6DB74 } /* Literal.String.Backtick */
.highlight .sc { color: #E6DB74 } /* Literal.String.Char */
.highlight .dl { color: #E6DB74 } /* Literal.String.Delimiter */
.highlight .sd { color: #E6DB74 } /* Literal.String.Doc */
.highlight .s2 { color: #E6DB74 } /* Literal.String.Double */
.highlight .se { color: #AE81FF } /* Literal.String.Escape */
.highlight .sh { color: #E6DB74 } /* Literal.String.Heredoc */
.highlight .si { color: #E6DB74 } /* Literal.String.Interpol */
.highlight .sx { color: #E6DB74 } /* Literal.String.Other */
.highlight .sr { color: #E6DB74 } /* Literal.String.Regex */
.highlight .s1 { color: #E6DB74 } /* Literal.String.Single */
.highlight .ss { color: #E6DB74 } /* Literal.String.Symbol */
.highlight .bp { color: #A6E22E } /* Name.Builtin.Pseudo */
.highlight .fm { color: #A6E22E } /* Name.Function.Magic */
.highlight .vc { color: #F8F8F2 } /* Name.Variable.Class */
.highlight .vg { color: #F8F8F2 } /* Name.Variable.Global */
.highlight .vi { color: #F8F8F2 } /* Name.Variable.Instance */
.highlight .vm { color: #F8F8F2 } /* Name.Variable.Magic */
.highlight .il { color: #AE81FF } /* Literal.Number.Integer.Long */