:root{
  --max: 1100px;
  --pad: 1rem;
  --radius: 14px;
  --border: #cfe3db;
  --text: #111;
  --muted: #555;
  --bg: #E6F4EF;
  --bg-alt: #F6FFFB;
  --focus: 2px solid #111;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

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

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* Accessibility */
.skip-link{
  position: absolute; left: -999px; top: auto;
  width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus{
  left: 1rem; top: 1rem;
  width: auto; height: auto;
  padding: .5rem .75rem;
  background: #fff;
  outline: var(--focus);
  border-radius: 10px;
  z-index: 9999;
}

/* =========================
   Public Header / Nav
   (scoped so it won’t override member repo nav)
   ========================= */
.site-header{
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .75rem 0;
}

.brand{
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  color: inherit;
}
.brand-logo{ width: 64px; height: 64px; }
.brand-name{ font-weight: 700; }

.hero-logo{
  width: 140px;
  height: auto;
  margin-bottom: .75rem;
}

/* Keep nav positioning predictable */
.site-header nav{ position: relative; }

.site-header .nav-toggle{
  display: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .5rem .75rem;
  background: #fff;
}
.site-header .nav-toggle:focus-visible{ outline: var(--focus); }

.site-header .nav-menu{
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header .nav-menu a{
  color: inherit;
  text-decoration: none;
  padding: .4rem .5rem;
  border-radius: 10px;
}
.site-header .nav-menu a:focus-visible{ outline: var(--focus); }
.site-header .nav-menu a:hover{ background: var(--bg-alt); }

.site-header .nav-menu a[aria-current="page"]{
  background: var(--bg-alt);
  border: 1px solid var(--border);
}

/* Member button/link style on public site */
.member-link{
  border: 1px solid var(--border);
}

/* =================
   Hero
   ================= */
.hero{
  padding: 2.5rem 0;
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 1.25rem;
  align-items: center;
}
.hero-copy h1{
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.1;
  margin: 0 0 .75rem;
}

.lead{ color: var(--muted); font-size: 1.05rem; margin: 0 0 1rem; }

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

.hero-media img{
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

/* =================
   Sections / Layout
   ================= */
.section{
  padding: 2.25rem 0;
}
.section-alt{
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Cards */
.cards{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: #fff;
}

.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Lists */
.bullets{ padding-left: 1.1rem; }
.bullets li{ margin: .4rem 0; }

/* Buttons */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .6rem .9rem;
  border-radius: 14px;
  border: 1px solid #111;
  background: #111;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}
.btn:focus-visible{ outline: var(--focus); outline-offset: 2px; }
.btn-secondary{
  background: #fff; color: #111;
}
.btn-ghost{
  background: transparent; color: #111; border: 1px solid var(--border);
}

/* Footer */
.site-footer{
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
}

/* =================
   Responsive (Public)
   ================= */
@media (max-width: 820px){
  .hero-grid{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: 1fr; }
  .two-col{ grid-template-columns: 1fr; }

  .site-header .nav-toggle{ display: inline-flex; }

  .site-header .nav-menu{
    display: none;
    position: absolute;
    right: 1rem;
    top: 64px;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .5rem;
    min-width: 200px;
    z-index: 100;
    gap: .25rem; /* compact vertical spacing in dropdown */
  }
  .site-header .nav-menu.open{ display: flex; }
}

/* Screen-reader only helper (used in captions) */
.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);
  white-space:nowrap;border:0;
}

/* =================
   Carousel
   ================= */
.carousel-track{
  display:flex;
  gap: 1rem;
  overflow-x:auto;
  scroll-snap-type: x mandatory;
  padding-bottom: .5rem;
}
.carousel-item{
  flex: 0 0 80%;
  scroll-snap-align: start;
  margin: 0;
}
.carousel-item img{
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.carousel-controls{
  display:flex;
  gap:.5rem;
  margin-top:.75rem;
}
@media (min-width: 820px){
  .carousel-item{ flex-basis: 40%; }
}