/* ==========================================================================
   Collection of fast matrix multiplication algorithms — stylesheet
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-text: #1c1e21;
  --color-text-muted: #5a5f66;
  --color-border: #dfe2e6;
  --color-accent: #0b5fa5;
  --color-accent-hover: #084272;
  --color-row-hover: #eef4fb;
  --color-square-bg: #f2f7fd;
  --radius: 6px;
  --max-width: 1100px;
  --font-body: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
}

h1, h2, h3 { line-height: 1.25; }

a { color: var(--color-accent); text-decoration: none; }
a:hover, a:focus { color: var(--color-accent-hover); text-decoration: underline; }

/* Skip link */
.skip-nav-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-accent);
  color: #fff;
  padding: 0.6em 1em;
  z-index: 1000;
  border-radius: 0 0 var(--radius) 0;
}
.skip-nav-link:focus {
  left: 0;
  top: 0;
}

/* Header / nav */
.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(180%) blur(6px);
  z-index: 50;
}

.logo_univ_lille
{	/* it is too big, shrink it to the header size */
  height: 2.25rem;
  width: auto;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-weight: 600;
  color: var(--color-text);
}
.site-nav a:hover { color: var(--color-accent); }

/* Page layout */
.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

section { margin-bottom: 2.5rem; }

.bibtex-list {
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}
.bibtex-list li { margin-bottom: 0.5rem; }

.notice {
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  padding: 0.75rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  word-break: break-all;
}

/* Dataset controls */
.dataset-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.dataset-controls input[type="search"] {
  flex: 1 1 260px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}
.dataset-controls input[type="search"]:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.dataset-controls button {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
}
.dataset-controls button:hover { background: #e9edf1; }

.result-count {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Table */
.table-scroll {
  overflow: auto;
  max-height: 70vh;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 780px;
  font-size: 0.9rem;
}
.fmm-table th:nth-child(2),
.fmm-table th:nth-child(3),
.fmm-table td[data-col="fast_tensor_rank"] 
.fmm-table td[data-col="classical_tensor_rank"] 
{
  width: 200px;            /* Set your desired fixed width here */
  white-space: normal;     /* Allows "Tensor" and "rank" to wrap onto 2 lines */
  word-break: break-word; /* Handles wrapping if width is smaller than "Tensor" */
  text-align: center;     /* Optional: centers the content in the narrow column */
}
caption {
  caption-side: top;
  text-align: left;
  font-weight: 600;
  padding: 0.75rem 1rem;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}

thead th {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 2px solid var(--color-border);
  text-align: center ;
  padding: 0.6rem 0.75rem;
  white-space: nowrap;
  z-index: 2;
}

tbody td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

tbody tr.row:hover {
  background: var(--color-row-hover);
}

tbody tr[data-square="true"] {
  background: var(--color-square-bg);
}

tbody tr.row.is-hidden {
  display: none;
}

td[data-col="name"] { white-space: nowrap; font-family: var(--font-mono); }
td[data-col="ratio"],
td[data-col="complexity"] { font-family: var(--font-mono); white-space: nowrap; }

.toggle-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--color-accent);
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
}
.toggle-btn:hover { color: var(--color-accent-hover); }
.toggle-btn[aria-expanded="true"] { font-weight: 600; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  padding: 1.5rem 1.25rem;
}
.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: var(--max-width);
  margin-inline: auto;
}
.site-footer li { margin-bottom: 0.4rem; }

.smallcaps { font-variant: small-caps; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .site-header { padding: 0.6rem 0.9rem; }
  .page { padding: 1rem 0.9rem 3rem; }
  table { font-size: 0.82rem; }
}

@media print {
  .site-header, .dataset-controls, .skip-nav-link { display: none; }
  tbody tr.row.is-hidden { display: table-row; } /* show everything when printing */
}