/* ================================================================
   SHARED STRUCTURAL
   ================================================================ */
.page {
    max-width: 960px;
    padding: 60px 32px 120px;
}

/* Hide nbconvert chrome */
.prompt { display: none; }
.anchor-link { display: none; }

/* Top navigation */
.nb-topnav {
    padding-bottom: 1.2em;
    margin-bottom: 2.5em;
}
.nb-topnav-home {
    display: inline-block;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.6em;
}
.nb-topnav-title {
    font-weight: 600;
    margin-bottom: 0.4em;
}
.nb-topnav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.nb-topnav-list li { margin: 0.2em 0; }
.nb-topnav-list li:not(.is-current)::before {
    content: '\203A';
    margin-right: 0.4em;
    opacity: 0.5;
}
.nb-topnav-list a { text-decoration: none; }
.nb-topnav-current { font-weight: 600; font-size: 28px; }

/* Notebook cells */
.cell { margin-bottom: 1.5em; }
.text_cell_render { padding: 0; }
.text_cell_render p { margin: 0.5em 0; line-height: 1.65; }

.text_cell_render h1 { margin: 1.5em 0 0.3em; line-height: 1.1; }
.text_cell_render h2 {
    margin: 2em 0 0.5em;
    padding: 0 0 0.3em;
    position: static;
    background: none;
    z-index: auto;
}
.text_cell_render h3 { margin: 1.5em 0 0.3em; }
.text_cell_render code {
    font-family: 'IBM Plex Mono', monospace;
    padding: 2px 6px;
    border-radius: 3px;
}

.input_area {
    border-left: none;
    padding: 1em;
    overflow-x: auto;
    margin: 0;
}
.input_area pre {
    margin: 0; padding: 0; background: none;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 15px;
    line-height: 1.6;
    white-space: pre;
}

.output_wrapper { margin: 0 0 0.5em 0; }
.output_area { padding: 0.6em 1em; overflow-x: auto; }
.output_area pre {
    background: none; border: none;
    padding: 0; margin: 0;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 15px;
}

.output_area img,
.output_png img {
    display: block;
    max-width: 80%;
    height: auto;
    margin: 0.8em auto;
}

.rendered_html table { border-collapse: collapse; margin: 0.5em 0; font-size: 15px; }
.rendered_html th,
.rendered_html td { padding: 0.4em 0.8em; text-align: left; }

/* Bottom navigation */
.nb-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3em;
    padding-top: 1.5em;
}
.nb-nav a { font-size: 1em; text-decoration: none; }

/* No italics on code comments */
.highlight .c, .highlight .ch, .highlight .cm,
.highlight .cpf, .highlight .c1, .highlight .cs,
.highlight .sd { font-style: normal !important; }

/* ================================================================

   DARK MODE (Noir)

   ================================================================ */
.theme-noir {
    background: #111;
    color: #aaa;
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 19px;
    line-height: 1.65;
}

.theme-noir .nb-topnav { border-bottom: 1px solid #222; font-family: 'Inter', sans-serif; }
.theme-noir .nb-topnav-home { color: #c0392b; font-size: 0.9em; }
.theme-noir .nb-topnav-home:hover { color: #e8e4dc; }
.theme-noir .nb-topnav-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2em, 5vw, 3em);
    font-weight: 400;
    font-style: italic;
    color: #f0ece4;
    line-height: 1.08;
    letter-spacing: -0.01em;
    margin-bottom: 0.5em;
}
.theme-noir .nb-topnav-list li::before { color: #444; }
.theme-noir .nb-topnav-list a { color: #666; font-size: 0.8em; font-family: 'Inter', sans-serif; }
.theme-noir .nb-topnav-list a:hover { color: #c0392b; }
.theme-noir .nb-topnav-current { color: #e8e4dc; font-family: 'Inter', sans-serif; }

.theme-noir .text_cell_render p { color: #aaa; font-size: 1em; }
.theme-noir .text_cell_render strong { color: #e8e4dc; }
.theme-noir .text_cell_render a { color: #c0392b; text-decoration: none; }
.theme-noir .text_cell_render a:hover { text-decoration: underline; }

.theme-noir .text_cell_render h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.4em;
    font-weight: 700;
    color: #e8e4dc;
    text-transform: none;
    letter-spacing: -0.01em;
}
.theme-noir .text_cell_render h2 {
    font-family: 'Inter', sans-serif;
    font-size: 1.1em;
    font-weight: 600;
    color: #e74c3c;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-bottom: 1px solid #222;
}
.theme-noir .text_cell_render h3 {
    font-family: 'Inter', sans-serif;
    font-size: 1.05em;
    font-weight: 600;
    color: #ccc;
}
.theme-noir .text_cell_render code {
    background: #1a1a1a;
    color: #c0392b;
    font-size: 0.92em;
}

.theme-noir .nb-nav { border-top: 1px solid #222; }
.theme-noir .nb-nav a { font-family: 'Inter', sans-serif; color: #c0392b; }
.theme-noir .nb-nav a:hover { color: #e8e4dc; }

.theme-noir .code_cell .input { border-left: 3px solid #333; }
.theme-noir .input_area {
    background: #0a0a0a;
    border: 1px solid #222;
    border-left: none;
    border-radius: 0 4px 4px 0;
}
.theme-noir .input_area pre { color: #c9d1d9; }

.theme-noir .output_wrapper { border-left: 3px solid #1a1a1a; }
.theme-noir .output_area { background: #0d0d0d; }
.theme-noir .output_area pre { color: #666; }
.theme-noir .output_stderr { background: #1a0a0a; }
.theme-noir .output_stderr pre { color: #c0392b; }
.theme-noir .output_area img { border: 1px solid #222; border-radius: 4px; }

.theme-noir .rendered_html th,
.theme-noir .rendered_html td { border: 1px solid #222; }
.theme-noir .rendered_html th { background: #1a1a1a; color: #ccc; }
.theme-noir .rendered_html td { color: #999; }

/* Dark syntax — One Dark inspired */
.theme-noir .highlight .c, .theme-noir .highlight .ch,
.theme-noir .highlight .cm, .theme-noir .highlight .cpf,
.theme-noir .highlight .c1, .theme-noir .highlight .cs { color: #666; }
.theme-noir .highlight .k, .theme-noir .highlight .kc,
.theme-noir .highlight .kd, .theme-noir .highlight .kn,
.theme-noir .highlight .kr { color: #e06c75; }
.theme-noir .highlight .kp { color: #e06c75; }
.theme-noir .highlight .s, .theme-noir .highlight .s1,
.theme-noir .highlight .s2, .theme-noir .highlight .sa,
.theme-noir .highlight .sb, .theme-noir .highlight .sc,
.theme-noir .highlight .dl, .theme-noir .highlight .sh { color: #98c379; }
.theme-noir .highlight .sd { color: #98c379; }
.theme-noir .highlight .si { color: #d19a66; }
.theme-noir .highlight .nb { color: #56b6c2; }
.theme-noir .highlight .nf, .theme-noir .highlight .fm { color: #61afef; }
.theme-noir .highlight .nc { color: #e5c07b; font-weight: bold; }
.theme-noir .highlight .nn { color: #61afef; }
.theme-noir .highlight .o { color: #888; }
.theme-noir .highlight .p { color: #abb2bf; }
.theme-noir .highlight .n { color: #c9d1d9; }
.theme-noir .highlight .m, .theme-noir .highlight .mi,
.theme-noir .highlight .mf, .theme-noir .highlight .mh,
.theme-noir .highlight .mo { color: #d19a66; }
.theme-noir .highlight .err { border: none; color: #c9d1d9; }
.theme-noir .highlight .bp { color: #56b6c2; }
.theme-noir .highlight .nd { color: #c678dd; }
.theme-noir .highlight .ow { color: #c678dd; }
.theme-noir .highlight .kt { color: #e5c07b; }
.theme-noir .highlight .w { color: #555; }

/* Newsletter footer — dark */
.theme-noir .site-footer { margin-top: 4em; }
.theme-noir .newsletter-signup { background: #111; text-align: center; }
.theme-noir .newsletter-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.5em;
    font-style: italic;
    color: #e8e4dc;
    margin-bottom: 0.2em;
}
.theme-noir .newsletter-desc {
    font-size: 0.8em;
    color: #666;
    margin-bottom: 0.5em;
}
.theme-noir .newsletter-embed {
    width: 100%;
    max-width: 480px;
    height: 100px;
}

/* ================================================================

   LIGHT MODE (Broadsheet)

   ================================================================ */
.theme-broadsheet {
    background: #f0ece4;
    color: #3a3530;
    font-family: 'IBM Plex Sans', -apple-system, sans-serif;
    font-size: 17px;
    line-height: 1.65;
}

.theme-broadsheet .nb-topnav { border-bottom: 2px solid #1a1a1a; font-family: 'IBM Plex Sans', sans-serif; }
.theme-broadsheet .nb-topnav-home { color: #c0392b; font-size: 0.95em; }
.theme-broadsheet .nb-topnav-home:hover { color: #1a1a1a; }
.theme-broadsheet .nb-topnav-title {
    font-family: 'Archivo Black', Impact, sans-serif;
    font-size: clamp(1.8em, 5vw, 2.8em);
    font-weight: 800;
    color: #1a1a1a;
    line-height: 0.92;
    text-transform: uppercase;
    letter-spacing: 0.01em;
    margin-bottom: 0.5em;
}
.theme-broadsheet .nb-topnav-list li::before { color: #999; }
.theme-broadsheet .nb-topnav-list a { color: #8b5e3c; font-size: 0.9em; font-family: 'IBM Plex Sans', sans-serif; }
.theme-broadsheet .nb-topnav-list a:hover { color: #c0392b; }
.theme-broadsheet .nb-topnav-current { color: #1a1a1a; font-family: 'IBM Plex Sans', sans-serif; }

.theme-broadsheet .text_cell_render p { color: #3a3530; font-size: 1em; }
.theme-broadsheet .text_cell_render strong { color: #1a1a1a; }
.theme-broadsheet .text_cell_render em { color: #555; }
.theme-broadsheet .text_cell_render a { color: #8b5e3c; }
.theme-broadsheet .text_cell_render a:hover { color: #c0392b; }

.theme-broadsheet .text_cell_render h1 {
    font-family: 'Archivo Black', sans-serif;
    font-size: 2em;
    font-weight: 400;
    color: #1a1a1a;
    text-transform: uppercase;
    letter-spacing: 0.01em;
}
.theme-broadsheet .text_cell_render h2 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1.1em;
    font-weight: 600;
    color: #1a1a1a;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 2px solid #ccc5b8;
}
.theme-broadsheet .text_cell_render h3 {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1.05em;
    font-weight: 600;
    color: #3a3530;
}
.theme-broadsheet .text_cell_render code {
    background: #e5e0d6;
    color: #1a1a1a;
    font-size: 0.92em;
}

.theme-broadsheet .nb-nav { border-top: 2px solid #1a1a1a; }
.theme-broadsheet .nb-nav a { font-family: 'IBM Plex Sans', sans-serif; color: #8b5e3c; font-weight: 500; }
.theme-broadsheet .nb-nav a:hover { color: #c0392b; }

.theme-broadsheet .code_cell .input { border-left: 3px solid #1a1a1a; }
.theme-broadsheet .input_area {
    background: #faf7f2;
    border: 1px solid #d8d2c8;
    border-left: none;
    border-radius: 0;
}
.theme-broadsheet .input_area pre { color: #3a3530; }

.theme-broadsheet .output_wrapper { border-left: 3px solid #d8d2c8; }
.theme-broadsheet .output_area { background: #e8e3da; }
.theme-broadsheet .output_area pre { color: #888; }
.theme-broadsheet .output_stderr { background: #f5e0e0; }
.theme-broadsheet .output_stderr pre { color: #993333; }
.theme-broadsheet .output_area img { border: 1px solid #ccc5b8; }

.theme-broadsheet .rendered_html th,
.theme-broadsheet .rendered_html td { border: 1px solid #ccc5b8; }
.theme-broadsheet .rendered_html th { background: #e5e0d6; color: #1a1a1a; font-weight: 600; }

/* Light syntax — warm earth tones */
.theme-broadsheet .highlight .c, .theme-broadsheet .highlight .ch,
.theme-broadsheet .highlight .cm, .theme-broadsheet .highlight .cpf,
.theme-broadsheet .highlight .c1, .theme-broadsheet .highlight .cs { color: #8a8078; }
.theme-broadsheet .highlight .k, .theme-broadsheet .highlight .kc,
.theme-broadsheet .highlight .kd, .theme-broadsheet .highlight .kn,
.theme-broadsheet .highlight .kr { color: #8b5e3c; font-weight: bold; }
.theme-broadsheet .highlight .kp { color: #8b5e3c; }
.theme-broadsheet .highlight .s, .theme-broadsheet .highlight .s1,
.theme-broadsheet .highlight .s2, .theme-broadsheet .highlight .sa,
.theme-broadsheet .highlight .sb, .theme-broadsheet .highlight .sc,
.theme-broadsheet .highlight .dl, .theme-broadsheet .highlight .sh { color: #4a7a4a; }
.theme-broadsheet .highlight .sd { color: #4a7a4a; }
.theme-broadsheet .highlight .si { color: #b07030; }
.theme-broadsheet .highlight .nb { color: #2a6a6a; }
.theme-broadsheet .highlight .nf, .theme-broadsheet .highlight .fm { color: #1a5a9a; }
.theme-broadsheet .highlight .nc { color: #8a5a2a; font-weight: bold; }
.theme-broadsheet .highlight .nn { color: #1a5a9a; }
.theme-broadsheet .highlight .o { color: #666; }
.theme-broadsheet .highlight .p { color: #3a3530; }
.theme-broadsheet .highlight .n { color: #3a3530; }
.theme-broadsheet .highlight .m, .theme-broadsheet .highlight .mi,
.theme-broadsheet .highlight .mf, .theme-broadsheet .highlight .mh,
.theme-broadsheet .highlight .mo { color: #b07030; }
.theme-broadsheet .highlight .err { border: none; }
.theme-broadsheet .highlight .bp { color: #2a6a6a; }
.theme-broadsheet .highlight .nd { color: #7a4a8a; }
.theme-broadsheet .highlight .ow { color: #8b5e3c; font-weight: bold; }
.theme-broadsheet .highlight .kt { color: #8a5a2a; }
.theme-broadsheet .highlight .w { color: #bbb; }

/* Newsletter footer — light */
.theme-broadsheet .site-footer { margin-top: 4em; }
.theme-broadsheet .newsletter-signup { background: #f0ece4; text-align: center; }
.theme-broadsheet .newsletter-title {
    font-family: 'Archivo Black', sans-serif;
    font-size: 1.6em;
    text-transform: uppercase;
    color: #1a1a1a;
    margin-bottom: 0.2em;
}
.theme-broadsheet .newsletter-desc {
    font-size: 0.85em;
    color: #888;
    margin-bottom: 0.5em;
}
.theme-broadsheet .newsletter-embed {
    width: 100%;
    max-width: 480px;
    height: 100px;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 640px) {
    .page { padding: 40px 16px 100px; }
}