/* Stylesheet for simple.html only. Self-contained: it does not load ycsun.css.
   Monospace, one narrow measure, dotted rules, no chrome. */

:root {
    color-scheme: light;

    --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Source Code Pro", Menlo,
        Consolas, "DejaVu Sans Mono", monospace;

    --text-xs: 0.72rem;
    --text-sm: 0.8rem;
    --text-base: 0.9rem;
    --text-lg: 1.2rem;
    --text-xl: 1.45rem;
    --text-2xl: 1.85rem;

    --leading-body: 1.8;
    --leading-snug: 1.45;
    --leading-tight: 1.25;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;

    --content-width: 70ch;
    --sidebar-width: 280px;
    --sidebar-media-max: 220px;
    --layout-gap: 72px;
    --page-pad: 20px;
    --layout-breakpoint: 760px;

    /* Paper and ink. Navy carries over from the full site as the link colour. */
    --paper: #faf8f3;
    --ink: #1d2740;
    --ink-body: #35312a;
    --ink-muted: #857e72;
    --link: #1a2a44;
    --rule: #35312a;
    --rule-faint: #ddd6c7;
    --selection: rgba(26, 42, 68, 0.14);
}

html[data-theme='dark'] {
    color-scheme: dark;
    --paper: #191817;
    --ink: #f1eee7;
    --ink-body: #d5d0c6;
    --ink-muted: #928b80;
    --link: #b8c9ee;
    --rule: #c3bbab;
    --rule-faint: #383430;
    --selection: rgba(184, 201, 238, 0.18);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

::selection {
    background: var(--selection);
}

html {
    -webkit-text-size-adjust: 100%;
    scrollbar-gutter: stable;
    background: var(--paper);
}

body {
    margin: 0 auto;
    padding: var(--page-pad);
    max-width: calc(var(--content-width) + var(--layout-gap) + var(--sidebar-width) + 2 * var(--page-pad));
    font-family: var(--font-mono);
    font-size: var(--text-base);
    line-height: var(--leading-body);
    color: var(--ink-body);
    background: var(--paper);
    text-align: left;
    overflow-wrap: break-word;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    column-gap: var(--space-5);
    row-gap: var(--space-1);
    margin-bottom: var(--space-10);
    padding-bottom: var(--space-5);
    border-bottom: 2px dotted var(--rule);
    line-height: var(--leading-snug);
}

.site-title {
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

header nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    column-gap: var(--space-5);
    row-gap: 0;
    text-transform: lowercase;
}

header nav a,
header nav button {
    padding: var(--space-1) 3px;
    margin-left: -3px;
    color: var(--ink);
    text-decoration: none;
}

header nav a:hover,
header nav a[data-active],
header nav button:hover {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 5px;
}

header nav a:focus-visible,
header nav button:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
}

.theme-toggle {
    display: inline-flex;
    align-items: baseline;
    gap: 0;
    border: 0;
    background: none;
    font: inherit;
    text-transform: lowercase;
    color: var(--ink-muted);
    cursor: pointer;
    white-space: nowrap;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Rendered as [day] / [night]: a state marker, not a decorated control.
   theme.js also writes a sun/moon glyph, which the monospace face renders badly. */
.theme-toggle-icon {
    display: none;
}

.theme-toggle::before {
    content: "[";
}

.theme-toggle::after {
    content: "]";
}

.theme-toggle:hover {
    color: var(--ink);
}

/* Views. Only one renders at a time once simple.js is running. */
.js .view,
.js .sidebar {
    display: none;
}

.js .view[data-active] {
    display: block;
}

.js .sidebar[data-active] {
    display: block;
}

/* Layout */
main.layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
}

main.layout > .content {
    min-width: 0;
}

main.layout > .sidebar {
    margin-top: var(--layout-gap);
}

main.layout > .content > :first-child,
main.layout > .sidebar > :first-child {
    margin-top: 0;
}

@media (min-width: 760px) {
    main.layout {
        grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
        column-gap: var(--layout-gap);
        align-items: start;
    }

    main.layout > h1 {
        grid-column: 1 / -1;
        grid-row: 1;
    }

    main.layout > .content {
        grid-column: 1;
        grid-row: 2;
    }

    main.layout > .sidebar {
        grid-column: 2;
        grid-row: 2;
        margin-top: 0;
    }
}

/* Text */
h1,
h2 {
    font-family: inherit;
    font-weight: 700;
    color: var(--ink);
    line-height: var(--leading-tight);
    letter-spacing: -0.01em;
}

h1 {
    font-size: var(--text-2xl);
    margin: 0 0 var(--space-6);
}

h2 {
    font-size: var(--text-xl);
    margin: var(--space-12) 0 var(--space-4);
}

p {
    margin: 0 0 var(--space-5);
}

a {
    color: var(--link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
    text-decoration-skip-ink: auto;
    transition: text-decoration-thickness 0.14s ease;
}

a:hover {
    text-decoration-thickness: 2px;
}

a:focus-visible {
    outline: 2px solid var(--link);
    outline-offset: 2px;
}

strong {
    color: var(--ink);
    font-weight: 700;
}

/* Lists */
ul {
    padding-left: var(--space-6);
    margin: 0 0 var(--space-5);
}

li {
    margin-bottom: var(--space-1);
}

.papers {
    list-style: none;
    padding-left: 0;
}

.papers li {
    margin-bottom: var(--space-5);
}

.venue {
    display: block;
    color: var(--ink-muted);
    font-size: var(--text-sm);
    line-height: var(--leading-snug);
}

/* Sidebar */
figure {
    margin: 0 0 var(--space-6);
}

figure img {
    display: block;
    width: 100%;
    height: auto;
    max-width: var(--sidebar-media-max);
}

@media (min-width: 760px) {
    figure img {
        max-width: 100%;
    }
}

.sidebar > :last-child {
    margin-bottom: 0;
}

/* Standing note to prospective collaborators, closing the readme view. */
.note {
    margin-top: var(--space-8);
    padding-top: var(--space-5);
    border-top: 2px dotted var(--rule-faint);
    color: var(--ink-muted);
}

/* Footer */
footer {
    margin-top: var(--space-10);
    padding: var(--space-6) 0;
    border-top: 2px dotted var(--rule);
    font-size: var(--text-sm);
    color: var(--ink-muted);
}

footer p {
    margin: 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-4);
    margin-bottom: var(--space-2);
    text-transform: lowercase;
}

footer a {
    color: var(--ink-muted);
    text-decoration-color: var(--rule-faint);
}

footer a:hover {
    color: var(--ink);
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }

    header nav {
        display: inline-flex;
        margin-left: 0;
    }
}