/* ============================================
   Nu Alpha Kappa, Omicron Chapter (nevadanak.com)
   Brand: Red #ac1a2f | Gold #c5b783 | White | Black
   Type: Cinzel (Trajan alternative) + Jost (Futura alternative)
   ============================================ */

:root {
  --red: #ac1a2f;
  --red-dark: #7d1322;
  --gold: #c5b783;
  --gold-light: #ddd3ac;
  --white: #ffffff;
  --black: #000000;
  --ink: #0d0c0e;
  --ink-2: #16141a;
  --gray: #a9a5ad;
  --serif: "Cinzel", "Trajan Pro", serif;
  --sans: "Jost", "Futura", "Century Gothic", sans-serif;
  --max: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--ink);
  color: var(--white);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Typography ---------- */
h1, h2, h3, .display {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.2rem, 5.5vw, 4.2rem); }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.5rem); }

.kicker {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gold);
  margin-bottom: 14px;
}

.lead { font-size: 1.15rem; color: #d8d5dc; }

.gold { color: var(--gold); }
.red { color: var(--red); }

.rule {
  width: 64px; height: 3px;
  background: var(--red);
  margin: 22px 0;
  position: relative;
}
.rule::after {
  content: ""; position: absolute; left: 72px; top: 0;
  width: 20px; height: 3px; background: var(--gold);
}
.center .rule { margin-left: auto; margin-right: auto; }
.center .rule::after { display: none; }
.center { text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 15px 34px;
  border: 1px solid var(--red);
  background: var(--red);
  color: var(--white);
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.btn:hover { background: var(--red-dark); border-color: var(--red-dark); color: var(--white); }

.btn.ghost {
  background: transparent;
  border-color: var(--gold);
  color: var(--gold);
}
.btn.ghost:hover { background: var(--gold); color: var(--black); }

/* ---------- Header ---------- */
header.site {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(6, 5, 8, 0.92);
  border-bottom: 1px solid rgba(197, 183, 131, 0.18);
}
/* Blur lives on a pseudo-element: backdrop-filter on the header itself would
   make it the containing block for the fixed mobile drawer, collapsing it. */
header.site::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.nav-bar {
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 74px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--white);
}
.brand img { height: 46px; width: auto; }
.brand .t {
  font-family: var(--serif); font-weight: 700;
  font-size: 1.02rem; letter-spacing: 0.06em; line-height: 1.2;
}
.brand .t small {
  display: block; font-family: var(--sans);
  font-size: 0.62rem; letter-spacing: 0.34em;
  text-transform: uppercase; color: var(--gold); font-weight: 500;
}
nav.main ul { display: flex; gap: 30px; list-style: none; }
nav.main a {
  color: var(--white);
  font-size: 0.82rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.16em;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
nav.main a:hover { color: var(--gold); }
nav.main a.active { color: var(--gold); border-bottom-color: var(--red); }
.nav-toggle {
  display: none;
  background: none; border: 0; cursor: pointer;
  width: 40px; height: 40px; position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 8px;
  width: 24px; height: 2px; background: var(--white);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle span { top: 19px; }
.nav-toggle span::before { left: 0; top: -8px; }
.nav-toggle span::after { left: 0; top: 8px; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero.short { min-height: 62vh; padding-top: 74px; }
.hero .bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.hero .bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6,5,8,0.55) 0%, rgba(6,5,8,0.35) 45%, var(--ink) 100%);
}
.hero .wrap { position: relative; z-index: 2; padding-top: 74px; }
.hero .kicker { color: var(--gold-light); }
.hero p.sub { max-width: 560px; margin: 20px 0 32px; font-size: 1.2rem; color: #e8e5ec; }
.hero .actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section.block { padding: 96px 0; }
section.block.tight { padding: 64px 0; }
section.alt { background: var(--ink-2); }
section.red-band { background: var(--red); }
section.gold-band { background: var(--gold); color: var(--black); }

.grid-2 {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 56px; align-items: center;
}
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

.framed { position: relative; }
.framed img { width: 100%; height: 100%; object-fit: cover; }
.framed::before {
  content: ""; position: absolute; inset: -14px 14px 14px -14px;
  border: 1px solid var(--gold);
  pointer-events: none;
}

/* ---------- Stats ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; text-align: center;
}
.stats .n {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--gold);
}
.stats .l {
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 0.78rem; color: #d8d5dc; margin-top: 6px;
}
.red-band .stats .n { color: var(--white); }
.red-band .stats .l { color: var(--gold-light); }

/* ---------- Cards ---------- */
.card {
  background: var(--ink-2);
  border: 1px solid rgba(197, 183, 131, 0.16);
  padding: 40px 32px;
  transition: transform 0.25s, border-color 0.25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--gold); }
.card h3 { color: var(--gold); margin-bottom: 12px; }
.card p { color: #cfccd4; font-size: 0.98rem; }
section.alt .card { background: var(--ink); }

/* ---------- Photo tile nav ---------- */
.tile-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.tile {
  position: relative; display: block;
  aspect-ratio: 4 / 3; overflow: hidden;
}
.tile img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s;
}
.tile:hover img { transform: scale(1.06); }
.tile::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.05) 30%, rgba(0,0,0,0.75) 100%);
}
.tile .label {
  position: absolute; left: 18px; bottom: 14px; z-index: 2;
  font-family: var(--serif); font-weight: 700;
  color: var(--white); font-size: 1.1rem; letter-spacing: 0.04em;
}
.tile .label::after {
  content: ""; display: block; width: 34px; height: 2px;
  background: var(--red); margin-top: 6px;
  transition: width 0.3s;
}
.tile:hover .label::after { width: 60px; background: var(--gold); }

/* ---------- Tabs (values) ---------- */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 44px; }
.tabs button {
  font-family: var(--sans);
  text-transform: uppercase; letter-spacing: 0.18em;
  font-size: 0.85rem; font-weight: 600;
  padding: 13px 30px;
  background: transparent;
  border: 1px solid rgba(197, 183, 131, 0.35);
  color: var(--gray);
  cursor: pointer;
  transition: all 0.25s;
}
.tabs button:hover { color: var(--gold); border-color: var(--gold); }
.tabs button.active {
  background: var(--red); border-color: var(--red); color: var(--white);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp 0.45s ease; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Gallery ---------- */
.masonry { columns: 3; column-gap: 14px; }
.masonry a { display: block; margin-bottom: 14px; overflow: hidden; }
.masonry img { transition: transform 0.35s, opacity 0.35s; }
.masonry a:hover img { transform: scale(1.04); opacity: 0.85; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(0, 0, 0, 0.93);
  display: none; align-items: center; justify-content: center;
  padding: 4vh 4vw;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: 92vw; max-height: 90vh; object-fit: contain; }
.lightbox .close {
  position: absolute; top: 20px; right: 28px;
  font-size: 2rem; color: var(--white); cursor: pointer;
  background: none; border: 0; font-family: var(--sans);
}

/* ---------- Chapters ---------- */
.chapter-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.chapter {
  background: var(--ink-2);
  border: 1px solid rgba(197, 183, 131, 0.14);
  padding: 28px 18px 22px;
  text-align: center;
  transition: border-color 0.25s, transform 0.25s;
}
.chapter:hover { border-color: var(--gold); transform: translateY(-3px); }
.chapter img { width: 110px; height: 110px; object-fit: contain; margin: 0 auto 14px; }
.chapter .name {
  font-family: var(--serif); font-weight: 700; font-size: 1rem;
  color: var(--white);
}
.chapter .uni {
  font-size: 0.8rem; color: var(--gray);
  text-transform: uppercase; letter-spacing: 0.1em; margin-top: 4px;
}
.chapter .date {
  font-size: 0.74rem; color: var(--gold);
  letter-spacing: 0.06em; margin-top: 8px;
}
.chapter.home { border-color: var(--red); background: rgba(172, 26, 47, 0.08); }

/* ---------- Video embed ---------- */
.video-frame {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  border: 1px solid rgba(197, 183, 131, 0.3);
}
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- Carousel ---------- */
.carousel { position: relative; overflow: hidden; }
.carousel .track { display: flex; transition: transform 0.5s ease; }
.carousel .track > * { flex: 0 0 100%; }
.carousel .track img { width: 100%; height: 480px; object-fit: cover; }
.carousel .ctrl {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 5; width: 46px; height: 46px;
  background: rgba(0, 0, 0, 0.55); color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 1.2rem; cursor: pointer;
  transition: background 0.2s;
}
.carousel .ctrl:hover { background: var(--red); }
.carousel .prev { left: 14px; }
.carousel .next { right: 14px; }

/* ---------- Chapter map ---------- */
.map-frame {
  border: 1px solid rgba(197, 183, 131, 0.3);
  background: var(--ink-2);
}
#chapterMap { height: 540px; width: 100%; }
.nak-pin .dot {
  display: block; width: 100%; height: 100%;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 2px var(--gold);
}
.nak-pin .dot.home {
  background: var(--red);
  box-shadow: 0 0 0 2px var(--red), 0 0 14px rgba(172, 26, 47, 0.9);
}
.leaflet-popup-content-wrapper, .leaflet-popup-tip {
  background: var(--ink-2);
  color: var(--white);
  border: 1px solid rgba(197, 183, 131, 0.4);
  border-radius: 0;
}
.leaflet-popup-content { margin: 14px 16px; }
.leaflet-popup-content .pop { text-align: center; font-family: var(--sans); }
.leaflet-popup-content .pop img { width: 64px; height: 64px; object-fit: contain; margin: 0 auto 8px; }
.leaflet-popup-content .pop strong {
  display: block; font-family: var(--serif);
  color: var(--gold); font-size: 0.95rem;
}
.leaflet-popup-content .pop span { display: block; font-size: 0.82rem; color: #d8d5dc; margin-top: 2px; }
.leaflet-popup-content .pop em { display: block; font-style: normal; font-size: 0.74rem; color: var(--gray); margin-top: 6px; letter-spacing: 0.04em; }
.leaflet-container a.leaflet-popup-close-button { color: var(--gray); }
.map-credit {
  text-align: right;
  font-size: 0.68rem;
  color: #55515b;
  margin-top: 8px;
  letter-spacing: 0.03em;
}
.map-credit a { color: #6d6875; }
.map-credit a:hover { color: var(--gray); }
@media (max-width: 560px) {
  #chapterMap { height: 400px; }
}

/* ---------- Instagram embed ---------- */
.ig-embed {
  max-width: 640px;
  margin: 0 auto;
  border: 1px solid rgba(197, 183, 131, 0.3);
  background: var(--ink-2);
}
.ig-embed iframe {
  display: block;
  width: 100%;
  height: 760px;
  border: 0;
}
@media (max-width: 560px) {
  .ig-embed iframe { height: 620px; }
}

/* ---------- CTA band ---------- */
.cta-band { text-align: center; padding: 90px 24px; }
.cta-band h2 { max-width: 760px; margin: 0 auto 18px; }
.cta-band p { max-width: 560px; margin: 0 auto 32px; color: #e9e6ee; }

/* ---------- Footer ---------- */
footer.site {
  background: var(--black);
  border-top: 3px solid var(--red);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px;
  padding-bottom: 54px;
}
footer.site h4 {
  font-family: var(--serif); color: var(--gold);
  font-size: 1rem; letter-spacing: 0.08em;
  margin-bottom: 18px; text-transform: uppercase;
}
footer.site ul { list-style: none; }
footer.site li { margin-bottom: 10px; font-size: 0.95rem; }
footer.site a { color: #cfccd4; }
footer.site a:hover { color: var(--gold); }
.footer-brand { display: flex; align-items: flex-start; gap: 16px; }
.footer-brand img { height: 84px; }
.footer-brand p { color: var(--gray); font-size: 0.92rem; margin-top: 8px; }
.footer-legal {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 0.8rem; color: #7e7a84;
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Notice / TODO chip (build phase only) ---------- */
.todo {
  display: inline-block;
  background: rgba(197, 183, 131, 0.12);
  border: 1px dashed rgba(197, 183, 131, 0.5);
  color: var(--gold-light);
  font-size: 0.8rem; letter-spacing: 0.06em;
  padding: 6px 14px; margin-top: 14px;
}

/* ---------- Responsive ---------- */
@media (max-width: 940px) {
  .grid-2 { grid-template-columns: 1fr; gap: 40px; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .tile-nav { grid-template-columns: repeat(2, 1fr); }
  .masonry { columns: 2; }
  .chapter-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }

  nav.main {
    position: fixed; top: 74px; right: 0;
    height: calc(100vh - 74px);
    height: calc(100dvh - 74px);
    width: min(320px, 84vw);
    background: var(--black);
    border-left: 1px solid rgba(197, 183, 131, 0.2);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    padding: 36px 30px;
    overflow-y: auto;
  }
  nav.main.open { transform: none; }
  nav.main ul { flex-direction: column; gap: 22px; }
  .nav-toggle { display: block; }
  body.nav-open .nav-toggle span { background: transparent; }
  body.nav-open .nav-toggle span::before { transform: translateY(8px) rotate(45deg); }
  body.nav-open .nav-toggle span::after { transform: translateY(-8px) rotate(-45deg); }
}

@media (max-width: 560px) {
  .masonry { columns: 1; }
  .tile-nav { grid-template-columns: 1fr; }
  .chapter-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .carousel .track img { height: 300px; }
}