/* =========================================================================
   ScioVirtual · Codebusters — design system
   Matched to sciovirtual.org: flat #3b53d9 blue, #44cab2 teal, #202525 ink,
   Poppins headings, Lato body, 25px pill buttons with 3px borders.
   ========================================================================= */

:root {
  /* Brand — exact values from sciovirtual.org */
  --indigo:      #3b53d9;
  --indigo-600:  #2e42b8;
  --indigo-700:  #27389c;
  --night:       #202525;   /* footer, matches sciovirtual.org footer */
  --night-2:     #303737;
  --teal:        #44cab2;
  --teal-text:   #1e9c86;   /* teal dark enough for text on white */
  --teal-soft:   #e2f7f3;
  --gold:        #f5b942;
  --gold-soft:   #fdf3dd;

  /* Ink & surfaces */
  --ink:         #202525;
  --ink-2:       #3c4343;
  --muted:       #626a6a;
  --faint:       #858585;
  --line:        #e6e6e6;
  --line-strong: #d5d7dd;
  --paper:       #ffffff;
  --mist:        #ffffff;
  --lavender:    #fafafa;
  --lavender-2:  #eef0fb;

  /* Effects — sciovirtual.org card shadow */
  --shadow-sm: 0 3px 6px -2px rgba(29, 1, 80, .1);
  --shadow:    0 10px 20px -3px rgba(29, 1, 80, .1);
  --shadow-lg: 0 18px 36px -6px rgba(29, 1, 80, .14);
  --ring:      0 0 0 4px rgba(59, 83, 217, .22);

  --radius:    20px;
  --radius-sm: 10px;
  --radius-lg: 30px;
  --radius-pill: 25px;

  /* Type */
  --font-display: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:    "Lato", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono:    "Space Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --wrap: 1100px;
  --wrap-narrow: 760px;
}

/* ---- reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, iframe { max-width: 100%; }
img { height: auto; display: block; }
a { color: var(--indigo); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0 0 1rem; }
:focus-visible { outline: 3px solid var(--indigo); outline-offset: 2px; border-radius: 4px; }

/* ---- layout primitives ---- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: clamp(1.1rem, 4vw, 2.2rem); }
.narrow { max-width: var(--wrap-narrow); }
.section { padding-block: clamp(3rem, 7vw, 5rem); }
.section-tight { padding-block: clamp(2rem, 4vw, 3rem); }
.stack > * + * { margin-top: 1rem; }

.eyebrow {
  font-family: var(--font-display);
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--indigo);
  font-weight: 600;
  display: block;
  margin: 0 0 .6rem;
}

/* utility kept for cipher/code content */
.mono { font-family: var(--font-mono); }

/* ---- skip link ---- */
.skip {
  position: absolute; left: -999px; top: .5rem; z-index: 200;
  background: var(--night); color: #fff; padding: .6rem 1rem; border-radius: 8px;
}
.skip:focus { left: .5rem; }

/* =========================================================================
   Header / navigation  (rendered by site.js) — blue bar like sciovirtual.org
   ========================================================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--indigo);
}
.site-header :focus-visible { outline-color: #fff; }
.nav {
  display: flex; align-items: center; gap: 1rem;
  min-height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: .65rem;
  margin-right: auto; text-decoration: none; color: #fff;
}
.brand:hover { text-decoration: none; }
.brand-logo { width: 36px; height: 36px; flex: none; display: block; }
.brand-text { display: flex; align-items: baseline; gap: .5rem; line-height: 1; }
.brand-text b { font-family: var(--font-display); font-weight: 600; font-size: 1.25rem; }
.brand-text span {
  font-family: var(--font-display); font-weight: 500; font-size: .82rem;
  color: rgba(255,255,255,.75);
}

.nav-links { display: flex; align-items: center; gap: .1rem; list-style: none; margin: 0; padding: 0; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .5rem 1rem; border-radius: var(--radius-pill);
  color: #fff; font-family: var(--font-display); font-weight: 600; font-size: .95rem;
  text-decoration: none; white-space: nowrap;
  transition: background .15s ease;
}
.nav-link:hover { background: rgba(255,255,255,.14); text-decoration: none; }
.nav-link[aria-current="page"], .nav-link.is-current { background: rgba(255,255,255,.18); }
.nav-link .caret { width: .5em; height: .5em; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg); margin-left: .1rem; transition: transform .2s ease; opacity: .8; }

/* dropdown */
.nav-menu {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 230px;
  background: var(--paper); border: 1px solid var(--line);
  border-radius: 14px; box-shadow: var(--shadow); padding: .5rem;
  list-style: none; margin: 0;
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: opacity .16s ease, transform .16s ease, visibility .16s;
}
.nav-item.open > .nav-menu,
.nav-item:hover > .nav-menu,
.nav-item:focus-within > .nav-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-item.open > .nav-link .caret,
.nav-item:hover > .nav-link .caret { transform: rotate(-135deg); }
.nav-menu a {
  display: block; padding: .55rem .75rem; border-radius: 9px;
  color: var(--ink-2); font-family: var(--font-display); font-weight: 500; font-size: .92rem;
  text-decoration: none;
}
.nav-menu a:hover { background: var(--lavender-2); color: var(--indigo-700); }
.nav-menu a[aria-current="page"] { color: var(--indigo-700); background: var(--lavender-2); }
.nav-menu .group-label {
  font-family: var(--font-display); font-weight: 600; font-size: .72rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--faint); padding: .5rem .75rem .25rem;
}
/* collapsible sub-groups (days): closed by default so the menu stays short */
.nav-menu .sub-group summary {
  display: flex; align-items: center; gap: .45rem;
  padding: .55rem .75rem; border-radius: 9px; cursor: pointer;
  font-family: var(--font-display); font-weight: 600; font-size: .92rem;
  color: var(--ink-2); list-style: none;
}
.nav-menu .sub-group summary::-webkit-details-marker { display: none; }
.nav-menu .sub-group summary:hover { background: var(--lavender-2); color: var(--indigo-700); }
.nav-menu .sub-group summary a { display: inline; padding: 0; border-radius: 0; font-weight: 600; color: inherit; }
.nav-menu .sub-group summary a:hover { background: none; }
.nav-menu .sub-group summary .caret {
  width: .5em; height: .5em; margin-left: auto;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(45deg); transition: transform .2s ease; opacity: .7;
}
.nav-menu .sub-group details[open] > summary .caret { transform: rotate(-135deg); }
.nav-menu .sub-menu {
  list-style: none; margin: .1rem 0 .3rem .95rem; padding: 0 0 0 .25rem;
  border-left: 2px solid var(--line);
}
.nav-menu .sub-menu a { font-size: .88rem; }

/* header CTA — sciovirtual.org "Register" style: white 3px outline pill */
.nav-cta {
  margin-left: .5rem; white-space: nowrap;
  padding: .35rem 1.3rem; border-radius: var(--radius-pill);
  border: 3px solid #fff;
  background: transparent; color: #fff !important;
  font-family: var(--font-display); font-weight: 600; font-size: .95rem;
  transition: background .15s ease, color .15s ease;
}
.nav-cta:hover { text-decoration: none; background: #fff; color: var(--indigo) !important; }

.nav-toggle {
  display: none; margin-left: auto;
  width: 44px; height: 44px; border: 0; border-radius: 10px;
  background: transparent; cursor: pointer; padding: 0;
  align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; background: #fff; border-radius: 2px;
  position: relative; transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after  { position: absolute; top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after  { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1024px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: .1rem;
    background: var(--indigo);
    padding: .8rem clamp(1.1rem, 4vw, 2.2rem) 1.4rem;
    box-shadow: var(--shadow); max-height: calc(100vh - 64px); overflow-y: auto;
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-link { padding: .75rem .9rem; font-size: 1rem; border-radius: 12px; }
  .nav-link .caret { margin-left: auto; }
  .nav-menu {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; border-left: 2px solid rgba(255,255,255,.3);
    background: transparent;
    border-radius: 0; margin: 0 0 .4rem .9rem; padding: .2rem 0 .2rem .3rem;
    display: none;
  }
  .nav-menu a { color: rgba(255,255,255,.92); }
  .nav-menu a:hover, .nav-menu a[aria-current="page"] { background: rgba(255,255,255,.14); color: #fff; }
  .nav-menu .group-label { color: rgba(255,255,255,.6); }
  .nav-menu .sub-group summary { color: rgba(255,255,255,.92); }
  .nav-menu .sub-group summary:hover { background: rgba(255,255,255,.14); color: #fff; }
  .nav-menu .sub-menu { border-left-color: rgba(255,255,255,.3); }
  .nav-item.open > .nav-menu { display: block; }
  .nav-cta { margin: .6rem 0 0; text-align: center; }
}

/* =========================================================================
   Buttons — sciovirtual.org recipe: 25px pill, 3px border, Poppins 600
   ========================================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  padding: .55rem 1.6rem; border-radius: var(--radius-pill);
  border: 3px solid transparent;
  cursor: pointer; text-decoration: none;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--indigo); border-color: var(--indigo); color: #fff; }
.btn-primary:hover { background: var(--indigo-600); border-color: var(--indigo-600); }
.btn-teal { background: var(--teal); border-color: var(--teal); color: #fff; }
.btn-teal:hover { background: #2cac99; border-color: #2cac99; }
.btn-ghost { background: transparent; color: var(--indigo); border-color: var(--indigo); }
.btn-ghost:hover { background: var(--indigo); color: #fff; }
/* on blue/teal backgrounds — sciovirtual.org register button */
.btn-light { background: transparent; color: #fff; border-color: #fff; }
.btn-light:hover { background: #fff; color: var(--indigo); }
.btn .arrow { transition: transform .18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* =========================================================================
   Cards & badges
   ========================================================================= */
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.6rem; box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card-link { display: block; color: inherit; }
.card-link:hover { text-decoration: none; transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.badge {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: var(--font-display); font-size: .74rem; font-weight: 600;
  letter-spacing: .04em; text-transform: uppercase;
  padding: .28rem .75rem; border-radius: var(--radius-pill);
  background: var(--lavender-2); color: var(--indigo-700);
}
.badge.teal { background: var(--teal-soft); color: #147a68; }
.badge.gold { background: var(--gold-soft); color: #91620d; }
.badge.coral { background: #fdeae5; color: #b0492f; }

.grid { display: grid; gap: 1.4rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

/* day / section link lists (day hubs) */
.day-nav { display: grid; gap: 1.4rem; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.day-nav .card-link { display: flex; flex-direction: column; height: 100%; }
.day-nav .k {
  font-family: var(--font-display); font-weight: 600; font-size: .78rem;
  letter-spacing: .04em; color: var(--teal-text); text-transform: uppercase;
}
.day-nav h3 { margin: .5rem 0 .4rem; }
.day-nav p { color: var(--muted); margin: 0 0 1rem; }
.day-nav .go { margin-top: auto; font-family: var(--font-display); font-weight: 600; color: var(--indigo); }

/* =========================================================================
   Page shell (interior pages) — flat blue band like the sciovirtual.org hero
   ========================================================================= */
.page-head {
  background: var(--indigo);
  color: #fff;
  padding-block: clamp(2.4rem, 5vw, 3.6rem);
}
.page-head .crumbs {
  font-family: var(--font-display); font-weight: 500; font-size: .85rem;
  color: rgba(255,255,255,.8); margin-bottom: .7rem;
}
.page-head .crumbs a { color: #fff; }
.page-head h1 { margin-bottom: .35rem; color: #fff; }
.page-head .lead { font-size: 1.12rem; color: rgba(255,255,255,.88); max-width: 62ch; margin: 0; }

.prose { max-width: 70ch; }
.prose h2 { margin-top: 2.2rem; }
.prose h3 { margin-top: 1.6rem; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li { margin-bottom: .5rem; }
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
.prose code {
  font-family: var(--font-mono); font-size: .9em; background: var(--lavender-2);
  padding: .1em .4em; border-radius: 6px;
}

/* callout */
.callout {
  border: 1px solid var(--line); border-left: 4px solid var(--indigo);
  background: var(--paper); border-radius: 12px; padding: 1.1rem 1.3rem;
  box-shadow: var(--shadow-sm);
}
.callout.teal { border-left-color: var(--teal); }
.callout.gold { border-left-color: var(--gold); }
.callout p:last-child { margin-bottom: 0; }

/* resource list */
.res-list { list-style: none; padding: 0; margin: 1.4rem 0 0; display: grid; gap: .8rem; }
.res-list a.res {
  display: flex; align-items: center; gap: .9rem;
  padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: 14px;
  background: var(--paper); box-shadow: var(--shadow-sm); color: var(--ink);
  transition: box-shadow .15s ease, border-color .15s ease;
}
.res-list a.res:hover { text-decoration: none; border-color: var(--indigo); box-shadow: var(--shadow); }
.res-list .res .ic { font-family: var(--font-display); font-weight: 700; color: var(--indigo); flex: none; }
.res-list .res .meta { display: flex; flex-direction: column; }
.res-list .res .meta b { font-family: var(--font-display); font-weight: 600; }
.res-list .res .meta small { color: var(--faint); font-size: .82rem; }
.res-list .res .go { margin-left: auto; color: var(--faint); }

/* embeds */
.embed {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: var(--paper); box-shadow: var(--shadow);
}
.embed.doc { aspect-ratio: 8.5 / 11; }
.embed iframe { width: 100%; height: 100%; border: 0; display: block; }
.embed-video { position: relative; aspect-ratio: 16 / 9; }
.embed-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; }

/* "coming soon" placeholder */
.soon {
  text-align: center; padding: clamp(2.5rem, 6vw, 4.5rem) 1.5rem;
  border: 2px dashed var(--line-strong); border-radius: var(--radius);
  background: var(--lavender);
}
.soon .mono { font-family: var(--font-display); font-weight: 600; color: var(--muted); }
.soon h2 { margin: .5rem 0 .3rem; }
.soon p { color: var(--muted); margin: 0; }

/* =========================================================================
   Footer  (rendered by site.js) — #202525 like sciovirtual.org
   ========================================================================= */
.site-footer { background: var(--night); color: #c9cdcd; margin-top: 4rem; }
.site-footer a { color: #c9cdcd; }
.site-footer a:hover { color: #fff; }
.site-footer :focus-visible { outline-color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 2rem; padding-block: 3.2rem 2rem; }
.footer-brand .brand { color: #fff; }
.footer-brand p { color: #9aa1a1; max-width: 34ch; margin-top: 1rem; font-size: .95rem; }
.footer-col h4 { color: #fff; font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; font-family: var(--font-display); font-weight: 600; margin-bottom: 1rem; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.footer-col a { font-size: .95rem; text-decoration: none; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-block: 1.4rem; display: flex; flex-wrap: wrap; gap: .6rem 1.5rem; justify-content: space-between; color: #8d9494; font-size: .85rem; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}