/* Custom theme on top of shower-material.
   Palette and fonts follow rubensworks.net: sky blue header, dark grey bands, navy headings, Open Sans. */

.shower {
    --slide-ratio: calc(16 / 9);

    --rt-sky: #2ba7ff;
    --rt-blue: #0072c4;
    --rt-navy: #005591;
    --rt-dark: #424242;

    --rt-bg: #ffffff;
    --rt-ink: #111111;
    --rt-ink-soft: #2e2e2e;
    --rt-muted: #6f6f6f;
    --rt-link: #1d6ad6;
    --rt-line: #dfe5ec;
    --rt-code-bg: #f1f5f9;
    --rt-code-ink: #123b63;
    --rt-zebra: rgba(43, 167, 255, 0.07);

    --color-key: var(--rt-sky);
    --color-light: var(--rt-line);
    --color-back: #e9edf1;
    --progress-size: 6px;

    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* List-mode header and footer, mirroring the site header and footer */

.caption {
    border-top: 10px solid var(--rt-dark);
    background: var(--rt-sky);
    background-image: none;
    padding: 0;
}

.caption .title {
    padding: 0.5em 1em 0.3em;
}

.caption h1 {
    color: var(--rt-dark);
    font-family: 'Open Sans', sans-serif;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.captiondata {
    background: var(--rt-dark);
    border-top: 1px solid #0090f7;
    border-bottom: 1px solid #0090f7;
    padding: 0.5em 1em;
}

.caption .captiondata p {
    color: #e8e8e8;
}

header .author {
    font-size: 0.6em;
    padding-bottom: 0.3em;
    line-height: 1.1em;
}

header .venue {
    font-size: 0.5em;
    font-style: italic;
}

footer {
    box-sizing: border-box;
    width: 100%;
    padding: 30px;
    border-top: 2px solid var(--rt-blue);
    background: var(--rt-dark);
    color: #e8e8e8;
    font-size: 0.5em;
}

footer a {
    color: #e8e8e8;
}

/* Slide canvas */

.shower.list,
.slide {
    color: var(--rt-ink);
    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.slide {
    background: var(--rt-bg);
    padding: 48px 72px 0 72px;
    line-height: 1.5;
}

/* No slide numbers */
.slide::after {
    display: none;
}

.progress {
    background: var(--rt-sky);
}

/* Typography */

h1, h2, h3, h4, h5, h6, .subtitle {
    font-family: 'Open Sans', sans-serif;
    letter-spacing: -0.02em;
}

.slide h2 {
    margin: 0 0 28px -28px;
    padding-left: 20px;
    border-left: 8px solid var(--rt-sky);
    color: var(--rt-navy);
    font-size: 42px;
    font-weight: 700;
    line-height: 1.12;
}

.slide h2.big {
    margin-top: 0.6em;
    font-size: 52px;
}

.slide h2 strong {
    font-weight: 800;
}

.slide h3, .slide h4, .slide h5, .slide h6 {
    margin: 0 0 4px;
    color: var(--rt-navy);
    font-weight: 700;
    line-height: 1.25;
}

.slide h3 {
    font-size: 26px;
}

.slide h2 code,
.slide h3 code {
    font-size: 0.85em;
}

.slide p {
    margin: 0 0 0.8em;
}

.indent {
    margin-left: 1em;
    color: var(--rt-ink-soft);
}

.center {
    text-align: center;
}

.inline {
    display: inline;
}

.hide {
    visibility: hidden;
}

/* Links */

a,
.slide a {
    color: var(--rt-link);
    text-decoration: none;
    background-image: none !important;
    border-bottom: 2px solid rgba(29, 106, 214, 0.3);
    transition: 0.2s;
}

a:hover,
.slide a:hover {
    border-bottom-color: var(--rt-link);
}

.slide a.reference {
    border: none;
    color: var(--rt-muted);
    font-size: 0.8em;
    font-style: italic;
}

.badge a:hover {
    border-bottom: none;
}

/* Lists: no markers, nesting shows through indentation */

.slide ul,
.slide ol {
    margin-bottom: 0.8em;
}

.slide ul > li,
.slide ol > li {
    margin-left: 0.6em;
    margin-bottom: 0.7em;
    line-height: 1.35;
}

.slide li ul,
.slide li ol {
    margin: 0.4em 0 0 1.4em;
}

.slide li li {
    margin-bottom: 0.3em;
}

.slide ul > li::before {
    content: none;
}

.slide ul.inline > li {
    display: inline;
    margin: 0;
}

.slide ul.inline > li:after {
    content: ", ";
}

.slide ul.inline > li:last-child:after {
    content: "";
}

li.current {
    color: var(--rt-ink);
    font-weight: 700;
}

li.inactive {
    color: var(--rt-muted);
}

/* Title slide: site header stripe on top, site footer band at the bottom */

.slide.title {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 120px;
    background: linear-gradient(to top, var(--rt-dark) 130px, var(--rt-bg) 130px);
}

.slide.title::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 12px;
    border-top: 8px solid var(--rt-dark);
    background: var(--rt-sky);
}

.slide.title h2 {
    margin: 0 0 18px;
    padding: 0;
    border: none;
    font-size: 62px;
    font-weight: 800;
    line-height: 1.05;
}

.slide.title h3 {
    margin: 0;
    color: var(--rt-blue);
    font-size: 27px;
    font-weight: 500;
}

.slide.title .author {
    position: absolute;
    left: 72px;
    bottom: 64px;
    margin: 0;
    font-size: 22px;
    font-weight: 700;
}

.slide.title .author a {
    border: none;
    color: #fff;
}

.slide.title .affiliation {
    position: absolute;
    left: 72px;
    bottom: 34px;
    margin: 0;
    color: #c2c2c2;
    font-size: 18px;
    font-style: normal;
}

.slide.title .affiliation a {
    border: none;
    color: inherit;
}

/* Index slides: dark, sky-blue left edge, current section in white */

.slide.index {
    display: flex;
    align-items: center;
    border: none;
    background: var(--rt-dark);
}

.slide.index::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 16px;
    background: var(--rt-sky);
}

.slide.index ul {
    margin: 0;
}

.slide.index ul > li {
    margin: 0 0 0.35em;
    color: rgba(255, 255, 255, 0.6);
    font-size: 36px;
    font-weight: 400;
    line-height: 1.2;
}

.slide.index ul > li a {
    border: none;
    color: inherit;
}

.slide.index ul > li.current {
    color: #fff;
    font-size: 42px;
    font-weight: 800;
}

/* Overview index slide (no current section): all items in full white */

.slide.index:not(:has(li.current)) ul > li {
    color: #fff;
}

/* Code */

.slide code,
.slide kbd,
.slide samp {
    margin: 0;
    padding: 0.08em 0.35em;
    border-radius: 4px;
    background: var(--rt-code-bg);
    color: var(--rt-code-ink);
    font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
    font-size: 0.88em;
    line-height: 1.2;
}

.slide pre {
    display: block;
    margin: 0.2em 0 0.7em;
    padding: 0.5em 0.8em;
    border-left: 4px solid var(--rt-sky);
    border-radius: 6px;
    background: var(--rt-code-bg);
    color: var(--rt-code-ink);
    font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
    font-size: 0.85em;
    line-height: 1.25;
    white-space: pre;
}

.slide pre code {
    display: inline;
    width: auto;
    margin: 0;
    padding: 0;
    background: none;
    font-size: inherit;
    line-height: inherit;
}

/* Adjacent pre blocks merge into one card */
.slide pre:has(+ pre) {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.slide pre + pre {
    margin-top: 0;
    padding-top: 0;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

/* Tables */

.slide table {
    width: 100%;
    margin-left: 0;
    font-size: 0.9em;
}

.slide th,
.slide td {
    padding: 0.2em 0.7em;
}

.slide th:first-child,
.slide td:first-child {
    padding-left: 0.7em;
}

.slide th:last-child,
.slide td:last-child {
    padding-right: 0.7em;
}

.slide tr > * {
    background: none;
}

.slide thead td,
.slide th {
    border-bottom: 2px solid var(--rt-sky);
    color: var(--rt-navy);
    font-weight: 700;
}

.slide tbody tr {
    border-bottom: 1px solid var(--rt-line);
}

.slide tbody tr:nth-child(even) {
    background: var(--rt-zebra);
}

.slide th.title,
.slide td.title {
    border-right: 1px solid var(--rt-line);
    font-weight: 700;
}

/* Callouts */

.definition {
    padding: 0.6em 0.9em;
    border-left: 5px solid var(--rt-sky);
    border-radius: 6px;
    background: var(--rt-code-bg);
}

.definition::before {
    content: "Definition";
    display: block;
    color: var(--rt-blue);
    font-size: 0.7em;
    font-style: normal;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

iframe {
    border: none;
    width: 100%;
    height: 462px;
}

@media print {
    footer {
        display: none;
    }
}

/* Team slide: two-column grid of members, team lead centered at the bottom */

.slide.team h2 {
    margin-bottom: 20px;
}

.slide.team .members {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 36px;
    row-gap: 14px;
    margin: 0;
}

.slide.team .members > li,
.slide.team .lead {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 0;
    line-height: 1.25;
}

.slide.team img {
    flex: none;
    width: 78px;
    height: 78px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--rt-sky);
}

.slide.team h3 {
    margin: 0 0 2px;
    font-size: 20px;
}

.slide.team h3 em {
    color: var(--rt-muted);
    font-weight: 500;
    font-style: italic;
}

.slide.team span {
    display: block;
    color: var(--rt-ink-soft);
    font-size: 15px;
}

.slide.team .lead {
    margin: 20px auto 0;
    padding-top: 16px;
    max-width: 640px;
    border-top: 2px solid var(--rt-line);
}

.slide.team .lead img {
    width: 88px;
    height: 88px;
    border-color: var(--rt-navy);
}