/* INESC TEC Research Prototypes
   Brand (Manual de Normas 2024):
     Pantone 313 #008bbe · Pantone 305 #64c7ea · Pantone Pinkoi Navy #00233d
   Type: Effra (primary, headings/body; local if installed, Rubik as web fallback)
         JetBrains Mono (secondary, research/data contexts: labels, codes, metrics) */

:root {
  --blue: #008bbe;
  --blue-light: #64c7ea;
  --navy: #00233d;
  --text: var(--navy);
  --text-dim: rgba(0, 35, 61, 0.70);
  --text-faint: rgba(0, 35, 61, 0.62);
  --line: rgba(0, 35, 61, 0.18);
  --line-soft: rgba(0, 35, 61, 0.10);
  --line-blue: rgba(0, 139, 190, 0.35);
  --tile-bg: #ffffff;
  --wash: rgba(100, 199, 234, 0.08);
  --sans: "Effra", "Rubik", -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --max-w: 1180px;
}

* { box-sizing: border-box; }

.tile, .chip, .site-nav a { -webkit-tap-highlight-color: transparent; }

/* visually hidden until keyboard-focused */
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 20;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  background: var(--blue);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; top: 0; }

.brand-logo { width: auto; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: #ffffff;
  min-height: 100vh;
}

/* faint circuit texture, brand "elemento gráfico" */
.circuit-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260' viewBox='0 0 260 260'%3E%3Cg fill='none' stroke='%23008bbe' stroke-width='1.4'%3E%3Cpath d='M20 40h60l24 24v52'/%3E%3Ccircle cx='20' cy='40' r='4'/%3E%3Ccircle cx='104' cy='116' r='4'/%3E%3Cpath d='M200 20v46l-30 30'/%3E%3Ccircle cx='200' cy='20' r='4'/%3E%3Ccircle cx='170' cy='96' r='4'/%3E%3Cpath d='M40 200h72m0 0 28-28h60'/%3E%3Ccircle cx='40' cy='200' r='4'/%3E%3Ccircle cx='240' cy='172' r='4'/%3E%3Cpath d='M232 232v-40'/%3E%3Ccircle cx='232' cy='232' r='4'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 260px 260px;
}

a { color: inherit; }

::selection { background: rgba(100, 199, 234, 0.4); }

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

.site-header {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }

.brand-logo { height: 34px; width: auto; display: block; }

.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--blue);
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

.site-nav {
  display: flex;
  gap: 26px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.site-nav a { text-decoration: none; color: var(--text-dim); padding-bottom: 3px; }
.site-nav a:hover, .site-nav a.active { color: var(--blue); border-bottom: 1px solid var(--blue); }

/* ---------- hero ---------- */

.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 56px 24px 40px;
}

.hero-eyebrow {
  margin: 0 0 20px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--blue);
}

.hero-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

/* optical alignment with the title's cap height */
.hero-side { padding-top: 0.55em; }

.hero-title {
  margin: 0;
  font-size: clamp(26px, 8vw, 68px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--navy);
}

.hero-title .dim { color: var(--blue); }

.hero-side p { margin: 0 0 14px; color: var(--text-dim); max-width: 46ch; }
.hero-side p.hero-stats { max-width: none; }

.hero-stats {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint) !important;
}

/* ---------- home: CTAs, video placeholder, stats ---------- */

.cta-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 8px;
  padding: 12px 20px;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.btn:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.btn-primary { background: var(--blue); color: #fff; font-weight: 700; border: 1px solid var(--blue); }
.btn-primary:hover { background: #00779f; border-color: #00779f; }

.btn-ghost { color: var(--blue); border: 1px solid var(--line); background: #fff; }
.btn-ghost:hover { border-color: var(--blue); }

.cta-line { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }

.socials { display: flex; align-items: center; gap: 6px; }

.socials a {
  display: grid;
  place-items: center;
  padding: 6px;
  color: var(--text-faint);
  border-radius: 6px;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.15s;
}
.socials a:hover { color: var(--blue); }
.socials a:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.socials svg { width: 18px; height: 18px; display: block; }

.home-video {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 24px 64px;
}

.home-video video, .home-video iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  border: 1px solid var(--line-blue);
  background: var(--wash);
  display: block;
}

/* ---------- solutions: page head ---------- */

.page-head {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 40px 24px 8px;
}
.page-head .section-title { margin: 0 0 10px; }
.page-head .hero-stats { margin: 0; }

/* ---------- filters ---------- */

.catalogue {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 72px;
  scroll-margin-top: 24px;
}

.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }

.chip {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 16px;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.chip:hover { border-color: var(--blue); color: var(--blue); }

.chip.on { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 700; }

.chip:focus-visible, .tile:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- grid tiles ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 16px;
}

.tile {
  display: flex;
  text-decoration: none;
  flex-direction: column;
  text-align: left;
  font-family: var(--sans);
  font-size: inherit;
  color: var(--text);
  background: var(--tile-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  padding: 0;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.tile:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 35, 61, 0.10);
}

.tile-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--text-faint);
}

.tile-top span:last-child { text-align: right; }

.oss-chip {
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--blue);
  border: 1px solid var(--blue);
  border-radius: 999px;
  padding: 1px 8px;
  white-space: nowrap;
}

.tile-diagram {
  height: 128px;
  padding: 10px 18px;
  color: var(--blue);
  background: var(--wash);
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.15s;
}

.tile:hover .tile-diagram { background: rgba(100, 199, 234, 0.16); }

.tile-diagram svg, .tile-diagram img { width: 100%; height: 100%; }

.tile-body { padding: 12px 14px 10px; flex: 1; }

.tile-area {
  margin: 0 0 4px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--blue);
}

.tile-name {
  display: block;
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--navy);
}

.tile-summary { display: block; margin: 0; font-size: 13px; color: var(--text-dim); }

.tile-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
}

.tile-open { color: var(--text-faint); text-transform: uppercase; }
.tile:hover .tile-open { color: var(--blue); }

/* TRL dot meter */
.trl { display: inline-flex; gap: 4px; }
.trl i {
  width: 6px; height: 6px; border-radius: 50%;
  background: rgba(0, 139, 190, 0.20);
}
.trl i.f { background: var(--blue); }

/* ---------- solution page (bento) ---------- */

.solution {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 28px 24px 72px;
}

.back-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
  text-decoration: none;
  margin-bottom: 26px;
  -webkit-tap-highlight-color: transparent;
}
.back-link:hover { text-decoration: underline; }
.back-link:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.solution-head { margin-bottom: 24px; }

.solution-head h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--navy);
}

.detail-eyebrow {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--blue);
}

/* bento grid */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.cell {
  border: 1px solid var(--line-soft);
  background: #fff;
  border-radius: 10px;
  padding: 18px;
  min-width: 0;
}

.cell-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--blue);
}

.cell p { margin: 0 0 10px; font-size: 14px; color: var(--text-dim); }
.cell p:last-child { margin-bottom: 0; }
.cell p.cell-label { margin-bottom: 10px; }

.cell-desc { grid-column: span 4; }
.cell-diagram { grid-column: span 2; display: flex; flex-direction: column; background: var(--wash); border-color: var(--line-blue); }
.cell-diagram .diagram-holder { flex: 1; color: var(--blue); min-height: 150px; }
.cell-diagram svg, .cell-diagram img { width: 100%; height: 100%; max-height: 280px; }
.cell-trl { grid-column: span 2; }
.cell-highlights { grid-column: span 4; }
.cell-papers { grid-column: span 4; }
.cell-contact { grid-column: span 2; }
.cell-links { grid-column: span 3; }
.cell-funding { grid-column: span 3; }

.cell-trl .trl { margin: 6px 0 10px; }
.cell-trl .trl i { width: 9px; height: 9px; }
.trl-big { font-family: var(--mono); font-size: 30px; font-weight: 800; color: var(--navy); }
.trl-scale { font-family: var(--mono); font-size: 11px; color: var(--text-faint); }

.cell ul { margin: 0; padding: 0; list-style: none; }

.cell-highlights li, .cell-links li {
  padding: 4px 0;
  font-size: 14px;
  color: var(--text-dim);
}

.cell-highlights li {
  position: relative;
  padding-left: 16px;
}
.cell-highlights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue);
}

.paper { padding: 6px 0; }
.paper a { color: var(--navy); text-decoration: none; font-weight: 700; font-size: 14px; }
.paper a:hover { color: var(--blue); text-decoration: underline; }
.paper .meta { display: block; font-family: var(--mono); font-size: 11px; color: var(--text-faint); margin-top: 3px; }

.cell-links a { color: var(--blue); text-decoration: none; }
.cell-links a:hover { text-decoration: underline; }
.cell-links a::after { content: " ↗"; }

.contact-name { font-weight: 700; color: var(--navy); margin-bottom: 2px; }
.contact-role { font-size: 12px; color: var(--text-faint); }
.contact-mail { display: inline-block; margin-top: 8px; font-family: var(--mono); font-size: 12px; color: var(--blue); text-decoration: none; }
.contact-mail:hover { text-decoration: underline; }

/* ---------- directory (phone layout) ---------- */

.directory { display: none; }

.dir-group { border-bottom: 1px solid var(--line-soft); }

.dir-head {
  margin: 0;
  padding: 16px 2px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--blue);
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
}
.dir-head::-webkit-details-marker { display: none; }
.dir-head:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.dir-line { flex: 1; height: 1px; background: var(--line-soft); }

.dir-count {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 8px;
}

.dir-toggle { width: 12px; text-align: center; color: var(--blue); font-size: 14px; }
.dir-toggle::before { content: "+"; }
.dir-group[open] .dir-toggle::before { content: "−"; }

.dir-group .dir-row:last-child { border-bottom: 0; }
.dir-group[open] { padding-bottom: 6px; }

.dir-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 2px;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.dir-row:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.dir-text { min-width: 0; }

.dir-name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}

.dir-tag {
  font-style: normal;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-left: 6px;
  white-space: nowrap;
}

.dir-sum {
  display: block;
  font-size: 12.5px;
  line-height: 1.45;
  color: var(--text-dim);
}

.dir-arrow {
  margin-left: auto;
  flex: none;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--blue);
}

/* phones browse the directory; tablets and up keep chips + tiles */
@media (max-width: 600px) {
  .filters, .grid { display: none; }
  .directory { display: block; }
}

.grid-error {
  grid-column: 1 / -1;
  margin: 0;
  padding: 32px 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
}

/* ---------- about & contact sections ---------- */

.page-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px 72px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 24px;
}

main > .page-section:first-child { border-top: 0; padding-top: 28px; }

.section-head { margin-bottom: 20px; }

.section-title {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.cell-facts { grid-column: span 2; }
.cell-list { grid-column: span 3; }
.cell-channels { grid-column: span 3; }

.facts { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 10px; }

.fact-value {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--navy);
}

.fact-label {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.cell-list li {
  position: relative;
  padding: 4px 0 4px 16px;
  font-size: 14px;
  color: var(--text-dim);
}
.cell-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--blue);
}

#contact-bento .cell-contact p { margin: 0 0 2px; font-size: 13px; }

.channels { display: grid; gap: 12px; }
.channels > div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 20px;
  align-items: baseline;
}
.channels .contact-mail { margin-top: 0; }
.contact-mail { overflow-wrap: anywhere; }
.channels .contact-mail { margin-top: 2px; }

.trl-status {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy);
}

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

.site-footer {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 26px 24px 34px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.site-footer a { color: var(--blue); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero-cols { grid-template-columns: 1fr; gap: 24px; }
  .cell-desc, .cell-diagram, .cell-trl, .cell-highlights,
  .cell-papers, .cell-contact, .cell-links, .cell-funding,
  .cell-facts, .cell-list, .cell-channels { grid-column: span 6; }
}

/* phones: chips become one swipeable row that bleeds to the screen edge;
   the clipped chip at the edge is the scroll affordance */
@media (max-width: 700px) {
  .filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    margin: -6px -24px 20px;
    padding: 6px 24px;
    scrollbar-width: none;
  }
  .filters::-webkit-scrollbar { display: none; }
  .chip { white-space: nowrap; flex: 0 0 auto; }
}

@media (max-width: 560px) {
  .site-header { flex-wrap: wrap; padding: 18px 20px 14px; }
  .brand { flex-direction: column; align-items: flex-start; gap: 5px; }
  .brand-logo { height: 28px; }
  .brand-sub { border-left: 0; padding-left: 2px; }
  .home-video { display: none; }
  .site-nav { gap: 18px; font-size: 11px; }
  .site-nav a { padding: 6px 0 3px; }
  .hero { padding-top: 36px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .page-section { padding-top: 36px; }
  .page-head { padding-top: 28px; }
  .channels > div { grid-template-columns: 1fr; gap: 2px; }
  .btn { padding: 11px 16px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tile, .chip, .tile-diagram { transition: none; }
}

/* Shown only when JavaScript is disabled (see the <noscript> block). */
.noscript-msg {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
  font-family: var(--mono, monospace);
}