/* ==========================================================================
   Marcelo Rovai — Edge AI & TinyML  (UNIFEI identity)
   Palette: UNIFEI Blue #003A70 · UNIFEI Gray #A2AAAD · UNIFEI Red #DA291C
            Highlight Orange #F37035 (presentation style) · Calibri
   Light is the primary mode (matches the slides: white, dark-gray text,
   orange highlights); dark mode uses UNIFEI blue.
   Content is driven by README.md; this stylesheet dresses the rendered
   markdown (.prose) and the layout chrome (hero, nav, cards, footer).
   ========================================================================== */

:root {
  /* Brand palette */
  --navy:       #003A70;   /* UNIFEI blue */
  --amber:      #F37035;   /* highlight orange (kept name for token reuse) */
  --amber-deep: #D9591C;   /* orange for text on light bg (legibility) */
  --red:        #DA291C;   /* UNIFEI red (sparing) */
  --ugray:      #A2AAAD;   /* UNIFEI gray */

  /* Light theme roles (primary — like the presentations) */
  --bg:        #FBFCFD;
  --bg-2:      #EEF2F6;
  --surface:   #FFFFFF;
  --surface-2: #F3F6FA;
  --ink:       var(--navy);   /* headings = UNIFEI blue */
  --ink-soft:  #33383D;       /* body = dark gray, not black */
  --muted:     #6C7580;
  --slate:     #3F6A92;       /* secondary blue: eyebrows, pins, numbers */
  --steel:     #7FB2E0;
  --line:      rgba(0, 58, 112, 0.14);
  --line-soft: rgba(0, 58, 112, 0.07);
  --accent:    var(--amber);
  --accent-tx: var(--amber-deep);
  --link:      #0A5CA8;
  --link-hover:var(--navy);
  --glow:      rgba(243, 112, 53, 0.20);

  --logo-light: block;
  --logo-dark:  none;

  --font-display: Calibri, Carlito, "Segoe UI", -apple-system, system-ui, sans-serif;
  --font-body:    Calibri, Carlito, "Segoe UI", -apple-system, system-ui, sans-serif;

  --maxw: 1080px;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,58,112,.06), 0 12px 32px -18px rgba(0,58,112,.28);
  --shadow-lg: 0 2px 6px rgba(0,58,112,.10), 0 30px 60px -28px rgba(0,58,112,.34);
}

/* Dark tokens — UNIFEI blue. Applied when the system prefers dark (unless the
   viewer chose light via the toggle), or when explicitly toggled to dark. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #002B52;   /* deep UNIFEI blue */
    --bg-2:      var(--navy);
    --surface:   #0A487F;
    --surface-2: #073E71;
    --ink:       #FFFFFF;
    --ink-soft:  #CAD7E6;
    --muted:     #8AA0BC;
    --slate:     #8FB0D4;
    --line:      rgba(255, 255, 255, 0.15);
    --line-soft: rgba(255, 255, 255, 0.08);
    --accent:    var(--amber);
    --accent-tx: #F7935F;
    --link:      var(--steel);
    --link-hover:var(--amber);
    --glow:      rgba(243, 112, 53, 0.24);
    --logo-light: none;
    --logo-dark:  block;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 34px -18px rgba(0,0,0,.7);
    --shadow-lg: 0 2px 6px rgba(0,0,0,.5), 0 34px 64px -28px rgba(0,0,0,.75);
  }
}
:root[data-theme="dark"] {
  --bg:        #002B52;
  --bg-2:      var(--navy);
  --surface:   #0A487F;
  --surface-2: #073E71;
  --ink:       #FFFFFF;
  --ink-soft:  #CAD7E6;
  --muted:     #8AA0BC;
  --slate:     #8FB0D4;
  --line:      rgba(255, 255, 255, 0.15);
  --line-soft: rgba(255, 255, 255, 0.08);
  --accent:    var(--amber);
  --accent-tx: #F7935F;
  --link:      var(--steel);
  --link-hover:var(--amber);
  --glow:      rgba(243, 112, 53, 0.24);
  --logo-light: none;
  --logo-dark:  block;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 34px -18px rgba(0,0,0,.7);
  --shadow-lg: 0 2px 6px rgba(0,0,0,.5), 0 34px 64px -28px rgba(0,0,0,.75);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */
* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 620px at 84% -10%, var(--glow), transparent 62%),
    radial-gradient(var(--line-soft) 1px, transparent 1px);
  background-size: auto, 26px 26px;
  background-attachment: fixed, scroll;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(22px, 4.5vw, 56px); }

a { color: var(--link); text-decoration-color: var(--line); text-underline-offset: 3px; }
a:hover { color: var(--link-hover); }

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

.eyebrow {
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--slate);
}

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.4) blur(10px);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  border-bottom: 1px solid var(--line-soft);
}
.nav {
  display: flex; align-items: center; gap: 20px;
  height: 62px;
}
.brand { display: inline-flex; align-items: center; margin-right: auto; }
.brand img { height: 30px; width: auto; display: block; }
.brand .logo-light { display: var(--logo-light); }
.brand .logo-dark  { display: var(--logo-dark); }

.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  font-family: var(--font-display); font-weight: 500; font-size: .82rem;
  letter-spacing: .01em; color: var(--ink-soft); text-decoration: none;
  padding: 7px 11px; border-radius: 8px; transition: color .2s, background .2s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); background: var(--line-soft); }
.nav-gh {
  border: 1px solid var(--line) !important;
  color: var(--ink) !important;
}
.nav-gh:hover { border-color: var(--accent) !important; color: var(--ink) !important; background: var(--line-soft) !important; }
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-links.compact { display: flex; }
  .nav-links.compact a:not(.nav-gh) { display: none; }
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; flex: none;
  border: 1px solid var(--line); border-radius: 10px;
  background: transparent; color: var(--ink-soft); cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--accent); background: var(--line-soft); }
.theme-toggle svg { width: 18px; height: 18px; display: none; }
/* Show the icon for the theme you can switch TO. */
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun  { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-sun  { display: block; }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero { padding: 70px 0 20px; }
.hero-top {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
  gap: 48px; align-items: center;
}
.hero-copy { min-width: 0; }
.hero-mark { justify-self: end; width: clamp(210px, 27vw, 300px); }
.hero-mark img {
  display: block; width: 100%;
  filter: drop-shadow(0 18px 30px rgba(0, 58, 112, .16));
  animation: floaty 7s ease-in-out infinite;
}
.hero-mark .logo-light { display: var(--logo-light); }
.hero-mark .logo-dark  { display: var(--logo-dark); }
@media (prefers-reduced-motion: reduce) { .hero-mark img { animation: none; } }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@media (max-width: 860px) {
  .hero-top { grid-template-columns: 1fr; gap: 22px; }
  .hero-mark { order: -1; justify-self: start; width: clamp(170px, 44vw, 230px); }
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.03;
  letter-spacing: -.01em;
  margin: 14px 0 0;
  color: var(--ink);
}
/* Presentation-style orange highlighter on a headline word */
.hero h1 .hl {
  color: var(--ink);
  background: linear-gradient(180deg, transparent 60%, color-mix(in srgb, var(--accent) 46%, transparent) 60%);
  padding: 0 .05em; border-radius: 2px;
}
.hero h1 sup {
  font-family: var(--font-display);
  font-size: .2em; font-weight: 500; letter-spacing: .06em;
  color: var(--muted); vertical-align: super; margin-left: .4em;
  text-transform: uppercase;
}
.hero .lede {
  font-size: 1.22rem; line-height: 1.5; color: var(--ink-soft);
  max-width: 42ch; margin: 22px 0 0; font-weight: 400;
}
.hero .lede a { color: var(--ink); text-decoration-color: var(--accent); font-weight: 500; }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 500; font-size: .9rem; letter-spacing: .01em;
  padding: 12px 22px; border-radius: 999px; text-decoration: none;
  transition: transform .18s ease, box-shadow .2s, background .2s, border-color .2s, color .2s;
}
.btn-primary { background: var(--accent); color: var(--navy); box-shadow: var(--shadow); }
.btn-primary:hover { color: var(--navy); transform: translateY(-2px); box-shadow: var(--shadow-lg); filter: brightness(1.03); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--ink); transform: translateY(-2px); }

/* Stat chips */
.stats {
  display: flex; flex-wrap: wrap; gap: 12px 30px;
  margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line-soft);
}
.stat { display: flex; flex-direction: column; gap: 3px; }
.stat b {
  font-family: var(--font-display); font-size: 1.85rem; font-weight: 700;
  color: var(--ink); line-height: 1;
}
.stat span {
  font-family: var(--font-display); font-weight: 500; font-size: .68rem; letter-spacing: .11em;
  text-transform: uppercase; color: var(--muted);
}

/* Map figure */
.map-figure { margin: 46px 0 0; }
.map-frame {
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.map-frame img { display: block; border-radius: 6px; width: 100%; }
.map-cap {
  display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between;
  margin-top: 14px; font-family: var(--font-display); font-weight: 500; font-size: .74rem;
  color: var(--muted); letter-spacing: .01em;
}
.map-cap .partners { color: var(--ink-soft); }
.map-cap .partners b { color: var(--slate); font-weight: 500; }

/* --------------------------------------------------------------------------
   Category grid (static nav into the README sections)
   -------------------------------------------------------------------------- */
.cats { padding: 60px 0 12px; }
.cats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}
.cat {
  position: relative;
  display: flex; flex-direction: column; gap: 6px;
  padding: 20px 18px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none; color: var(--ink);
  transition: transform .18s ease, box-shadow .2s, border-color .2s;
  overflow: hidden;
}
.cat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--accent); transform: scaleY(0); transform-origin: top;
  transition: transform .22s ease;
}
.cat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cat:hover::before { transform: scaleY(1); }
.cat .num {
  font-family: var(--font-display); font-weight: 500; font-size: .74rem; letter-spacing: .12em;
  color: var(--slate);
}
.cat h3 {
  font-family: var(--font-display); font-weight: 700; font-size: 1.22rem;
  margin: 2px 0 0; letter-spacing: -.01em; color: var(--ink);
}
.cat p { margin: 0; font-size: .9rem; color: var(--ink-soft); line-height: 1.45; }
.cat .go {
  margin-top: 8px; font-family: var(--font-display); font-weight: 500; font-size: .76rem;
  color: var(--muted); transition: color .2s;
}
.cat:hover .go { color: var(--slate); }

/* --------------------------------------------------------------------------
   Prose — the rendered README
   -------------------------------------------------------------------------- */
.prose { padding-top: 26px; padding-bottom: 20px; counter-reset: sect; }

/* Invisible in-content jump targets placed before each section heading. */
.prose a.anchor-target { display: block; height: 0; scroll-margin-top: 84px; }
.prose p:has(> a.anchor-target:only-child) { margin: 0; height: 0; }

/* Hide the README's own hero block (H1 + intro + map + first rule):
   the designed hero above already presents this content. The README stays
   fully self-contained for the GitHub repo page. */
.prose > h1:first-child,
.prose > h1:first-child + p,
.prose > hr:first-of-type,
.prose p:has(> img[src*="network"]),
.prose img[src*="network"] { display: none !important; }

/* Body paragraphs (e.g. the About Me bio) */
.prose p { margin: 0 0 16px; color: var(--ink-soft); max-width: 74ch; }
.prose p a { color: var(--link); font-weight: 500; }
.prose p a:hover { color: var(--link-hover); }
.prose p strong a { text-decoration-color: var(--accent); }

/* Profile photo — floats beside the About Me bio (removes itself if the file
   is missing, via onerror in the README). */
.prose img.profile-photo {
  float: right;
  width: clamp(150px, 30%, 240px);
  border-radius: 16px;
  margin: 4px 0 18px 30px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
@media (max-width: 600px) {
  .prose img.profile-photo { float: none; display: block; width: 70%; margin: 0 0 20px; }
}

/* Section headers (## in README) */
.prose h2 { scroll-margin-top: 84px; }
.prose h2 {
  counter-increment: sect;
  position: relative;
  font-family: var(--font-display);
  font-weight: 700; font-size: clamp(1.8rem, 3.6vw, 2.4rem);
  letter-spacing: -.02em; line-height: 1.06;
  margin: 68px 0 4px; padding-top: 26px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 78px;
  color: var(--ink);
}
.prose h2::before {
  content: counter(sect, decimal-leading-zero);
  position: absolute; top: 26px; right: 0;
  font-family: var(--font-display); font-size: .82rem; font-weight: 500;
  letter-spacing: .1em; color: var(--slate);
}
.prose h2 a.anchor, .prose h3 a.anchor { display: none; } /* kramdown auto-anchors */

/* Subsection labels within Workshops (### with NO link) */
.prose h3:not(:has(a)) {
  font-family: var(--font-display);
  font-size: .82rem; font-weight: 500; letter-spacing: .15em; text-transform: uppercase;
  color: var(--slate);
  margin: 34px 0 6px; padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

/* Entry rows: ### that contain a link, and #### list items */
.prose h3:has(a),
.prose li > h4 {
  font-family: var(--font-body);
  font-weight: 500; font-size: 1.06rem; line-height: 1.4;
  letter-spacing: 0;
  margin: 0;
  padding: 13px 14px 13px 30px;
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  transition: background .18s, padding-left .18s;
}
.prose h3:has(a) { padding-left: 30px; }
.prose h3:has(a)::before,
.prose li > h4::before {
  content: ""; position: absolute; left: 12px; top: 1.35em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--slate);
  box-shadow: 0 0 0 0 var(--glow);
  transition: box-shadow .25s, background .2s;
}
.prose h3:has(a):hover,
.prose li > h4:hover {
  background: var(--surface-2);
  padding-left: 34px;
}
.prose h3:has(a):hover::before,
.prose li > h4:hover::before {
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--glow);
}

/* Links inside entry rows */
.prose h3 a, .prose li > h4 a { text-decoration: none; }
.prose h3 > a:first-child, .prose li > h4 > a:first-child {
  color: var(--ink); background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 2px; background-repeat: no-repeat; background-position: 0 100%;
  transition: background-size .25s ease, color .2s;
}
.prose h3:hover > a:first-child, .prose li > h4:hover > a:first-child {
  color: var(--link-hover); background-size: 100% 2px;
}
/* Secondary links: [[Slides]] [[Video]] [[Material]] */
.prose h3 a:not(:first-child), .prose li > h4 a:not(:first-child) {
  font-family: var(--font-display); font-weight: 500; font-size: .74rem; color: var(--slate);
  padding: 1px 6px; border-radius: 5px; background: var(--line-soft);
  margin-left: 4px; white-space: nowrap;
}
.prose h3 a:not(:first-child):hover, .prose li > h4 a:not(:first-child):hover {
  background: color-mix(in srgb, var(--accent) 30%, transparent); color: var(--ink);
}

/* Lists (workshop sub-groups) */
.prose ul { list-style: none; margin: 0; padding: 0; }
.prose li { margin: 0; }

/* Divider + closing note */
.prose hr {
  border: none; border-top: 1px solid var(--line); margin: 56px 0 0;
}
.prose > p:last-of-type {
  max-width: none;
  margin-top: 34px; padding: 22px 24px;
  background: var(--surface); border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  font-size: 1rem; color: var(--ink-soft); line-height: 1.6;
}
.prose > p:last-of-type a { color: var(--link); font-weight: 500; }

/* Licence note under the closing card — a <div>, not a <p>, so the card above
   keeps its :last-of-type styling. */
.prose .repo-licence {
  margin-top: 22px;
  font-size: .86rem; line-height: 1.55; color: var(--muted);
}
.prose .repo-licence a { color: var(--link); font-weight: 500; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: 72px; border-top: 1px solid var(--line);
  background: var(--surface-2);
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 30px;
  padding-top: 48px; padding-bottom: 24px;
}
.footer-grid .foot-logo { height: 30px; width: auto; margin-bottom: 12px; }
.footer-grid .foot-logo.logo-light { display: var(--logo-light); }
.footer-grid .foot-logo.logo-dark  { display: var(--logo-dark); }
.footer-grid p { margin: 0; color: var(--ink-soft); font-size: .95rem; max-width: 48ch; }
.footer-grid p a { color: var(--link); font-weight: 500; }
.foot-links { display: flex; flex-direction: column; gap: 8px; }
.foot-links a {
  font-family: var(--font-display); font-weight: 500; font-size: .84rem; color: var(--ink-soft);
  text-decoration: none;
}
.foot-links a:hover { color: var(--link-hover); }
.foot-bottom {
  display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between;
  padding-top: 18px; padding-bottom: 40px; border-top: 1px solid var(--line-soft);
  font-family: var(--font-display); font-weight: 500; font-size: .74rem; color: var(--muted);
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Entrance animations (progressive; respects reduced motion)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(14px); }
  .reveal.in { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s cubic-bezier(.2,.7,.2,1); }
  .hero .eyebrow { animation: rise .7s .02s both; }
  .hero h1 { animation: rise .7s .08s both; }
  .hero .lede { animation: rise .7s .16s both; }
  .hero .cta-row { animation: rise .7s .24s both; }
  .hero .stats { animation: rise .7s .32s both; }
  .map-figure { animation: rise .8s .4s both; }
  @keyframes rise { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
}