/* ------------------------------------------------------------------ *
 * A Unified Feature Model for Microservice Identification and
 * Refactoring — artifact appendix.
 * Self-contained: no external fonts, no CDN, no framework.
 * ------------------------------------------------------------------ */

:root {
  --bg:        #ffffff;
  --bg-soft:   #f6f8fa;
  --bg-sunk:   #eef1f4;
  --fg:        #1c2024;
  --fg-muted:  #5b6570;
  --border:    #d8dee4;
  --accent:    #0a5ea8;
  --accent-fg: #ffffff;
  --shadow:    0 1px 2px rgba(0, 0, 0, .06), 0 4px 12px rgba(0, 0, 0, .05);
  --radius:    8px;
  --measure:   68rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:       #14171a;
    --bg-soft:  #1c2024;
    --bg-sunk:  #23282d;
    --fg:       #e6e9ec;
    --fg-muted: #a2acb6;
    --border:   #333a41;
    --accent:   #6cb2f5;
    --accent-fg:#0d1013;
    --shadow:   0 1px 2px rgba(0, 0, 0, .4), 0 4px 12px rgba(0, 0, 0, .3);
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
}

.wrap {
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--accent);
  color: var(--accent-fg);
  padding: .6rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

/* ---------------------------------------------------------- header */

.site-header {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 1.75rem 0 1.5rem;
}

.eyebrow {
  margin: 0 0 .35rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.25;
  letter-spacing: -.01em;
}
.site-title a { color: inherit; text-decoration: none; }
.site-title a:hover { color: var(--accent); }

.byline {
  margin: .6rem 0 0;
  font-size: .9rem;
  color: var(--fg-muted);
}

/* ------------------------------------------------------------- nav */

.site-nav {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: .8rem .85rem;
  color: var(--fg-muted);
  font-size: .92rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--fg); }
.site-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 100%;
  padding: .7rem 0;
  background: none;
  border: 0;
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

@media (max-width: 44rem) {
  .nav-toggle { display: block; }
  .site-nav ul { display: none; padding-bottom: .5rem; }
  .site-nav ul.is-open { display: block; }
  .site-nav { position: static; }
}

/* The Evaluation sub-navigation: papers on the first row, that paper's tools
   on the second. Rendered per page rather than toggled in JS, so every tool
   keeps a citable URL. Both rows scroll sideways rather than wrapping, which
   keeps the two levels visually distinct on a narrow screen. */

.sub-nav {
  margin: -0.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
}

.sub-nav ul {
  display: flex;
  gap: .2rem;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: thin;
}

.sub-nav a {
  display: block;
  padding: .5rem .7rem;
  color: var(--fg-muted);
  font-size: .88rem;
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}
.sub-nav a:hover { color: var(--fg); }
.sub-nav a[aria-current="page"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* The papers row reads as the primary level. */
.sub-nav-papers a { font-weight: 500; }

/* The tools row is subordinate: indented, smaller, and set off by a rule. */
.sub-nav-tools {
  border-top: 1px solid var(--border);
  padding-left: .6rem;
}
.sub-nav-tools a { font-size: .84rem; padding: .45rem .6rem; }

/* ---------------------------------------------------------- content */

main { padding: 2.25rem 1.25rem 3.5rem; }

h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 2em 0 .6em;
}
main > h1:first-child { margin-top: 0; }

h1 { font-size: 1.9rem; }
h2 {
  font-size: 1.4rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
}
h3 { font-size: 1.13rem; }
h4 { font-size: 1rem; }
h5, h6 { font-size: .93rem; color: var(--fg-muted); }

p, ul, ol { margin: 0 0 1rem; }
li > ul, li > ol { margin-bottom: .25rem; }

hr { height: 1px; margin: 2.5rem 0; background: var(--border); border: 0; }

blockquote {
  margin: 1.25rem 0;
  padding: .1rem 1.1rem;
  border-left: 3px solid var(--border);
  color: var(--fg-muted);
}

code, kbd, samp, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
}

code {
  background: var(--bg-sunk);
  padding: .12em .38em;
  border-radius: 4px;
  font-size: .875em;
  overflow-wrap: break-word;
}

pre {
  background: var(--bg-sunk);
  padding: .9rem 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .84rem;
  line-height: 1.5;
}
pre code { background: none; padding: 0; font-size: inherit; }

img { max-width: 100%; height: auto; }

/* ---------------------------------------------------------- tables */

/* Every table is wrapped by the generator in .table-scroll so that wide
   tables (coverage matrix, 26-column meta-review) scroll inside their own
   box and never make the page scroll sideways. */
.table-scroll {
  overflow-x: auto;
  margin: 0 0 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table { border-collapse: collapse; width: 100%; font-size: .88rem; }

th, td {
  padding: .5rem .7rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}

thead th {
  background: var(--bg-soft);
  font-weight: 600;
  white-space: nowrap;
  position: sticky;
  top: 0;
}
thead tr:last-child th { border-bottom: 2px solid var(--border); }

tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--bg-soft); }

td code { font-size: .82em; white-space: nowrap; }

/* Row-header column in the coverage matrix / meta-review. */
th[scope="row"] {
  background: var(--bg-soft);
  font-weight: 500;
  white-space: nowrap;
}

/* --------------------------------------------------- colour chips */

/* The mapping colours carry meaning, so never encode by colour alone:
   every chip pairs its swatch with a text label. */
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  white-space: nowrap;
  font-size: .82em;
}

.chip::before {
  content: "";
  width: .72em;
  height: .72em;
  flex: none;
  border-radius: 2px;
  border: 1px solid rgba(0, 0, 0, .28);
}

.chip-dark_green::before  { background: #1a7f37; }
.chip-light_green::before { background: #7ee08a; }
.chip-yellow::before      { background: #f2d861; }
.chip-red::before         { background: #d1242f; }
.chip-orange::before      { background: #f08a24; }
.chip-magenta::before     { background: #d648c4; }
.chip-none::before        { background: transparent; border-style: dashed; }

.legend { display: grid; gap: .5rem; padding-left: 0; list-style: none; }
.legend li { display: flex; gap: .6rem; align-items: baseline; }
.legend .chip { flex: none; min-width: 9.5em; }

/* ---------------------------------------------------------- figures */

figure.fm-image {
  margin: 1.5rem 0;
  padding: .9rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

figure.fm-image figcaption {
  margin-bottom: .7rem;
  font-size: .88rem;
  color: var(--fg-muted);
}

.fm-shots { display: grid; gap: .9rem; }

/* The mapping exports are ~4917x288 (17:1). Shown at page width they are a
   few pixels tall and unreadable, so the thumbnail is a cropped, clickable
   teaser and the real viewing happens in the lightbox. */
.fm-shot {
  display: block;
  width: 100%;
  padding: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: zoom-in;
  overflow: hidden;
  text-align: left;
  font: inherit;
  color: inherit;
}
.fm-shot:hover { border-color: var(--accent); }

.fm-shot img {
  display: block;
  width: 100%;
  /* Keeps the strip legible-ish as a teaser instead of a 40px sliver. */
  min-height: 74px;
  max-height: 190px;
  object-fit: cover;
  object-position: left center;
}

.fm-shot .fm-shot-label {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: .45rem .65rem;
  border-top: 1px solid var(--border);
  font-size: .8rem;
  color: var(--fg-muted);
}
.fm-shot .fm-shot-label b { color: var(--fg); font-weight: 600; }

/* --------------------------------------------------------- lightbox */

.lb {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  /* Opaque: the page behind must not show through, or the strip and the
     toolbar become hard to read against light page content. */
  background: #0b0d0f;
}
.lb[hidden] { display: none; }

.lb-bar {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  padding: .55rem .8rem;
  background: rgba(0, 0, 0, .45);
  color: #f2f4f6;
  font-size: .85rem;
}

.lb-title { margin-right: auto; font-weight: 600; }

.lb-bar button {
  min-width: 2.3rem;
  padding: .35rem .65rem;
  background: rgba(255, 255, 255, .12);
  color: #f2f4f6;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 5px;
  font: inherit;
  cursor: pointer;
}
.lb-bar button:hover { background: rgba(255, 255, 255, .22); }
.lb-bar button[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); }

.lb-stage {
  flex: 1;
  overflow: auto;
  cursor: grab;
  overscroll-behavior: contain;
}
.lb-stage.is-panning { cursor: grabbing; }

.lb-stage img {
  display: block;
  max-width: none;      /* native size; the stage scrolls */
  transform-origin: 0 0;
  image-rendering: -webkit-optimize-contrast;
  /* Drag-to-pan guards. The native image drag would otherwise hijack the
     gesture and cancel the pan (see lightbox.js). -webkit-user-drag is
     non-standard, so the JS is what covers Firefox; touch-action keeps a
     touch drag panning the strip instead of scrolling the page. */
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.lb-hint {
  padding: .4rem .8rem;
  background: rgba(0, 0, 0, .45);
  color: #b9c1c9;
  font-size: .76rem;
  text-align: center;
}

@media (max-width: 34rem) {
  .lb-hint { display: none; }
}

/* ------------------------------------------------------------ cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 2rem;
  padding: 0;
  list-style: none;
}

.cards li {
  margin: 0;
  padding: 1.05rem 1.15rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cards h3 { margin: 0 0 .35rem; font-size: 1.02rem; }
.cards h3 a { text-decoration: none; }
.cards h3 a:hover { text-decoration: underline; }
.cards p { margin: 0; font-size: .88rem; color: var(--fg-muted); }
.cards .card-files {
  margin-top: .55rem;
  font-size: .78rem;
  color: var(--fg-muted);
}

/* ------------------------------------------------------------ notes */

.note {
  margin: 1.5rem 0;
  padding: .9rem 1.1rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  font-size: .92rem;
}
.note p:last-child { margin-bottom: 0; }
.note strong { color: var(--fg); }

/* Trailing per-page downloads block. */
.downloads td:first-child { white-space: nowrap; }
.downloads td:last-child  { white-space: nowrap; color: var(--fg-muted); }

.meta-line {
  margin: -.4rem 0 1.4rem;
  font-size: .87rem;
  color: var(--fg-muted);
}

/* The provenance key on the Evaluation index: what each kind of image on a
   tool page actually is. A description list, since that is what it is. */

.provenance { margin: 0 0 1.5rem; }
.provenance dt {
  font-weight: 600;
  color: var(--fg);
  margin-top: .8rem;
}
.provenance dd {
  margin: .2rem 0 0;
  color: var(--fg-muted);
  font-size: .93rem;
}

/* The skills pipeline diagram. Plain text in a <pre>, so it degrades to
   readable ASCII anywhere and needs no diagram library. */

.pipeline {
  font-size: .82rem;
  line-height: 1.5;
  overflow-x: auto;
}

/* ----------------------------------------------------------- footer */

.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0 2.5rem;
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  font-size: .85rem;
  color: var(--fg-muted);
}
.site-footer p { margin: 0 0 .4rem; }

/* ------------------------------------------------------------ print */

@media print {
  .site-nav, .sub-nav, .lb, .skip-link, .nav-toggle { display: none !important; }
  body { color: #000; background: #fff; }
  .table-scroll { overflow: visible; border: 0; }
  a { color: #000; }
}