/* =============================================================
   TEDxDUTH 2025 — ARCHIVE MICROSITE
   Intentionally different palette, layout, and typography rhythm
   from the main site. Cream paper, editorial, numbered sections.
   ============================================================= */

/* Local theme tokens — override main site for this page only */
.archive-doc a{ color: inherit; text-decoration: none; }
.archive-doc h1, .archive-doc h2, .archive-doc h3, .archive-doc h4{ color: inherit; }
.archive-doc{
  --paper:        #efe7d8;
  --ink:          #0e0e0e;
  --ink-soft:     #2a2a2a;
  --muted:        #5a544a;
  --line:         rgba(14,14,14,.14);
  --red:          #e62b1e;
  --accent:       #1f3a5f;        /* a deep blue for contrast */
  --serif: 'Oswald', ui-sans-serif, system-ui;
  background: var(--paper);
  color: var(--ink);
}
.archive-doc.dark{
  --paper:        #14120e;
  --ink:          #f1ebdd;
  --ink-soft:     #e1dccd;
  --muted:        #a39b87;
  --line:         rgba(241,235,221,.16);
  --red:          #ff463a;
  --accent:       #88a9d1;
  background: var(--paper);
  color: var(--ink);
}

/* Hide the main site's chrome on this page */
.archive-doc .cursor-dot,
.archive-doc .cursor-outline,
.archive-doc #particle-field{ display:none !important; }
.archive-doc{ cursor: auto !important; }

/* Reset shared globals on this page */
.archive-doc body,
body.archive-doc{ background: var(--paper); color: var(--ink); }

/* Page layout: single column, no sidebar */
.arc-page{
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  padding-top: 60px; /* room for fixed top bar */
}

/* ===== Top bar (always visible) ===== */
.arc-top{
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(239,231,216,.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.archive-doc.dark .arc-top{ background: rgba(20,18,14,.92); }
.arc-top-inner{
  max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; gap: 24px;
  padding: 14px 28px;
}
.arc-mark{
  display:flex; align-items:center; gap: 12px;
  font-family: var(--serif); font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase;
  font-size: .9rem; color: inherit;
}
.arc-mark a{ color: inherit; display: inline-flex; align-items: center; transition: color .15s ease; }
.arc-mark a:hover{ color: var(--red); }
.arc-mark-logo{ flex-shrink: 0; }
.arc-logo{ height: 28px; width: auto; display:block; }
.arc-logo-light{ display:block; }
.arc-logo-dark{ display:none; }
.archive-doc.dark .arc-logo-light{ display:none; }
.archive-doc.dark .arc-logo-dark{ display:block; }
.arc-mark .slash{ color: var(--muted); }
.arc-mark-yr{ font-size: 1.05rem; }
.arc-back{
  display:inline-flex; align-items:center; gap: 6px;
  color: var(--muted); font-weight: 700; font-size: .82rem;
  text-transform: uppercase; letter-spacing: .08em;
  padding: 6px 10px; border-radius: 6px;
  transition: color .2s ease, background .2s ease;
}
.arc-back:hover{ color: var(--ink); background: rgba(0,0,0,.04); }
.dark .arc-back:hover{ background: rgba(255,255,255,.06); }
.arc-nav{
  display:flex; gap: 4px; margin-left: auto; align-items:center;
  flex-wrap: wrap;
}
.arc-nav a{
  font-size: .82rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--muted);
  padding: 8px 12px; border-radius: 6px;
  transition: color .2s ease, background .2s ease;
}
.arc-nav a:hover{ color: var(--ink); background: rgba(0,0,0,.04); }
.dark .arc-nav a:hover{ background: rgba(255,255,255,.06); }
.arc-nav a.active{ color: var(--ink); background: rgba(0,0,0,.06); }
.arc-nav a.active::after{
  content:""; position:absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px; background: var(--red);
}
.arc-nav a{ position: relative; }
.dark .arc-nav a.active{ background: rgba(255,255,255,.08); }
.arc-toggle{
  appearance:none; width: 38px; height: 22px; border:1px solid var(--line); border-radius: 99px;
  background: transparent; position:relative; cursor:pointer; margin-left: 8px;
  flex-shrink: 0;
}
.arc-toggle::after{
  content:""; position:absolute; top: 2px; left: 2px; width: 16px; height: 16px;
  background: var(--ink); border-radius: 50%; transition: transform .2s ease;
}
.arc-toggle:checked::after{ transform: translateX(16px); }

/* Hamburger for mobile */
.arc-burger{
  display:none; background:transparent; border:1px solid var(--line);
  border-radius: 6px; padding: 6px 10px; cursor:pointer;
  color: var(--ink); margin-left: auto;
}
.arc-burger svg{ width: 20px; height: 20px; display:block; }

/* Mobile drawer */
.arc-drawer{
  display: none;
  position: fixed; top: 60px; left: 0; right: 0; z-index: 99;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 20px 24px 28px;
  flex-direction: column;
  gap: 4px;
  max-height: calc(100dvh - 60px);
  overflow-y: auto;
}
.arc-drawer.open{ display: flex; }
.arc-drawer a{
  padding: 14px 4px; border-bottom: 1px solid var(--line);
  font-family: var(--serif); font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em; font-size: .95rem;
  color: var(--ink);
}
.arc-drawer a.active{ color: var(--red); }
.arc-drawer .drawer-foot{
  margin-top: 16px; display:flex; justify-content:space-between; align-items:center; gap: 12px;
  border-bottom: 0;
}
.arc-drawer .drawer-foot .arc-back{ padding: 0; border:0; }

@media (max-width: 980px){
  .arc-nav{ display:none; }
  .arc-back{ display:none; }
  .arc-burger{ display: inline-flex; }
  .arc-toggle{ display:none; }
}

/* ===== Container ===== */
.arc-wrap{
  max-width: 1400px; margin: 0 auto; width: 100%;
  padding: 0 28px;
}

/* ===== Marquee ribbon ===== */
.arc-ribbon{
  border-bottom: 1px solid var(--line);
  background: var(--ink); color: var(--paper);
  overflow: hidden; padding: 8px 0;
  font-family: var(--serif); font-weight: 700; text-transform: uppercase;
  letter-spacing: .12em; font-size: .82rem; white-space: nowrap;
}
.arc-ribbon .track{ display: inline-block; padding-left: 100%; animation: arc-slide 28s linear infinite; }
.arc-ribbon .track span{ margin: 0 28px; }
.arc-ribbon .track .dot{ color: var(--red); }
@keyframes arc-slide { from { transform: translateX(0); } to { transform: translateX(-100%); } }

/* ===== Sub-page hero (smaller than overview hero) ===== */
.arc-subhero{
  padding: 70px 0 50px;
  border-bottom: 1px solid var(--line);
}
.arc-subhero .arc-wrap{ display:grid; gap: 18px; }
.arc-subhero .crumb{
  display:flex; align-items:center; gap:10px;
  font-family: var(--serif); font-weight:700;
  text-transform:uppercase; letter-spacing:.12em; font-size:.78rem; color: var(--muted);
}
.arc-subhero .crumb a{ color: var(--muted); }
.arc-subhero .crumb a:hover{ color: var(--ink); }
.arc-subhero .crumb .sep{ opacity: .5; }
.arc-subhero h1{
  font-family: var(--serif);
  font-size: clamp(2.6rem, 6vw, 5rem); line-height: .95; letter-spacing: -.01em;
  margin: 0; font-weight: 700; text-transform: lowercase;
  color: var(--ink);
}
.arc-subhero h1 .accent{ color: var(--red); }
.arc-subhero .lede{
  font-family: var(--serif);
  font-size: clamp(1.15rem, 1.6vw, 1.4rem);
  font-weight: 500; line-height: 1.3; max-width: 50ch;
  color: var(--ink-soft); margin: 0;
}
@media (max-width: 700px){
  .arc-subhero{ padding: 36px 0 28px; }
  .arc-subhero h1{ font-size: 2.4rem; }
  .arc-subhero .lede{ font-size: 1.05rem; }
}

/* ===== Hero ===== */
.arc-hero{
  position: relative;
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--line);
}
.arc-hero .grid{
  display: grid;
  grid-template-columns: 1fr .85fr;
  gap: 56px;
  align-items: stretch;
}
@media (max-width: 980px){ .arc-hero .grid{ grid-template-columns: 1fr; gap: 36px; } }

.arc-hero .meta{
  display:flex; flex-direction:column; gap: 20px;
}
.arc-hero .stamp{
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--serif); font-weight: 700; text-transform: uppercase;
  letter-spacing: .12em; font-size: .78rem; color: var(--muted);
}
.arc-hero .stamp::before{
  content: ""; width: 36px; height: 1px; background: var(--ink);
}
.arc-hero h1{
  font-family: var(--serif);
  font-size: clamp(3.5rem, 9vw, 8.5rem);
  line-height: .92; letter-spacing: -.02em;
  margin: 0; font-weight: 700; text-transform: lowercase;
  color: var(--ink);
  word-break: break-word;
  display: block;
}
.arc-hero h1 .accent{ color: var(--red); }
.arc-hero .lede{
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 500; line-height: 1.3; max-width: 22ch;
  color: var(--ink-soft);
}
.arc-hero .where-when{
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: 8px;
}
.arc-hero .where-when > div{
  padding: 18px 0;
  border-right: 1px solid var(--line);
}
.arc-hero .where-when > div:last-child{ border-right: 0; padding-left: 24px; }
.arc-hero .where-when .label{
  font-size: .72rem; font-weight: 800; letter-spacing: .14em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 6px;
}
.arc-hero .where-when .val{
  font-family: var(--serif); font-size: 1.2rem; font-weight: 700; line-height: 1.1;
}

.arc-hero .actions{ display:flex; gap: 12px; flex-wrap:wrap; }
.arc-btn{
  display:inline-flex; align-items:center; gap: 8px;
  padding: 14px 22px; border-radius: 4px; font-weight: 800;
  text-transform: uppercase; letter-spacing: .06em; font-size: .85rem;
  border: 2px solid var(--ink); background: var(--ink); color: var(--paper);
  transition: transform .15s ease, background .2s ease, color .2s ease;
}
.arc-btn:hover{ transform: translateY(-2px); }
.arc-btn.ghost{ background: transparent; color: var(--ink); }
.arc-btn.ghost:hover{ background: var(--ink); color: var(--paper); }
.arc-btn.red{ background: var(--red); border-color: var(--red); color: #fff; }

.arc-hero .photo{
  position: relative;
  border-radius: 4px; overflow: hidden;
  aspect-ratio: 4/5;
  background: var(--ink);
  box-shadow: 0 30px 60px rgba(0,0,0,.18);
}
.arc-hero .photo img{
  width: 100%; height: 100%; object-fit: cover;
  filter: contrast(1.05) saturate(.9);
}
.arc-hero .photo .corner{
  position: absolute; top: 16px; left: 16px;
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--serif); font-size: .7rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: #fff; background: rgba(0,0,0,.45); padding: 6px 10px;
  backdrop-filter: blur(4px);
}
.arc-hero .photo .corner .red{ color: var(--red); }
.arc-hero .photo .yr-stamp{
  position: absolute; right: -12px; bottom: -22px;
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(8rem, 14vw, 14rem); line-height: 1;
  color: var(--paper);
  -webkit-text-stroke: 2px var(--paper);
  mix-blend-mode: difference;
  pointer-events: none;
  opacity: .9;
}

/* ===== Stats ===== */
.arc-stats{
  display: grid; grid-template-columns: repeat(4, 1fr);
  max-width: 1400px; margin: 0 auto; width: 100%;
  padding: 0 28px;
}
@media (max-width: 700px){ .arc-stats{ grid-template-columns: repeat(2, 1fr); padding: 0; } }
.arc-stat{
  padding: 22px 24px;
  border-right: 1px solid var(--line);
  display: grid; gap: 4px;
}
.arc-stat:first-child{ padding-left: 0; }
.arc-stat:last-child{ border-right: 0; padding-right: 0; }
@media (max-width: 700px){
  .arc-stat{ padding: 18px 20px; }
  .arc-stat:nth-child(2n){ border-right: 0; }
  .arc-stat:nth-child(-n+2){ border-bottom: 1px solid var(--line); }
}
.arc-stat .num{
  font-family: var(--serif);
  font-size: clamp(2rem, 3.4vw, 2.6rem); line-height: 1;
  font-weight: 700; color: var(--ink);
  display: flex; align-items: baseline; gap: 4px;
}
.arc-stat .num small{
  font-size: .8rem; color: var(--red); font-weight: 800;
}
.arc-stat .label{
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted); font-weight: 800;
}

/* ===== Section template ===== */
.arc-section{
  padding: 90px 0;
  border-bottom: 1px solid var(--line);
  position: relative;
  scroll-margin-top: 80px;
}
html{ scroll-behavior: smooth; }
.arc-section .head{
  display: grid; grid-template-columns: auto 1fr auto; gap: 28px;
  align-items: end; margin-bottom: 56px;
}
@media (max-width: 700px){ .arc-section .head{ grid-template-columns: 1fr; gap: 14px; } }
.arc-num{
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(3rem, 6vw, 5rem); line-height: .85;
  color: var(--red);
}
.arc-num::before{ content: "/ "; color: var(--ink); opacity: .4; }
.arc-title{
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1; font-weight: 700;
  text-transform: lowercase; letter-spacing: -.01em; margin: 0;
  color: var(--ink);
}
.arc-title .accent{ color: var(--red); }
.arc-section .more{
  font-size: .82rem; font-weight: 800; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink);
  border-bottom: 2px solid var(--ink); padding-bottom: 2px;
  align-self: end;
}
.arc-section .more:hover{ color: var(--red); border-color: var(--red); }

/* ===== Talks (editorial: featured + list) ===== */
.arc-talks-feature{
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px;
  align-items: center; margin-bottom: 64px;
}
@media (max-width: 980px){ .arc-talks-feature{ grid-template-columns: 1fr; } }
.arc-thumb{
  position:relative; aspect-ratio: 4/3; overflow: hidden; border-radius: 4px;
  background:#000; cursor:pointer;
  border: 1px solid var(--line);
}
.arc-thumb img{ width:100%; height:100%; object-fit: cover; transition: transform .6s ease; }
.arc-thumb:hover img{ transform: scale(1.04); }
.arc-thumb .play{
  position:absolute; inset:0; display:grid; place-items:center;
  background: linear-gradient(to top, rgba(0,0,0,.4), rgba(0,0,0,0) 60%);
}
.arc-thumb .play span{
  width: 70px; height: 70px; border-radius: 50%;
  background: var(--red); display:grid; place-items:center;
  box-shadow: 0 12px 30px rgba(0,0,0,.4);
}

.arc-feat-meta .tag{
  font-family: var(--serif); font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  font-size: .78rem; color: var(--red); margin-bottom: 16px;
  display:inline-block;
}
.arc-feat-meta h3{
  font-family: var(--serif); font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.05; margin: 0 0 12px;
}
.arc-feat-meta .author{
  font-weight: 800; letter-spacing: .04em; text-transform: uppercase;
  font-size: .85rem; color: var(--muted); margin-bottom: 18px;
}
.arc-feat-meta p{ color: var(--ink-soft); font-size: 1.05rem; line-height: 1.55; }

/* Talks list (rest) */
.arc-talks-list{ border-top: 1px solid var(--line); }
.arc-talk-row{
  display: grid; grid-template-columns: 80px 1.1fr 1fr 80px; gap: 28px;
  align-items: center; padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}
.arc-talk-row:hover{ background: rgba(0,0,0,.025); }
.dark .arc-talk-row:hover{ background: rgba(255,255,255,.04); }
.arc-talk-row .idx{
  font-family: var(--serif); font-weight: 700;
  color: var(--muted); font-size: 1.1rem; letter-spacing: .04em;
}
.arc-talk-row .ttl{
  font-family: var(--serif); font-size: 1.35rem; font-weight: 700; line-height: 1.15;
}
.arc-talk-row .by{
  color: var(--muted); font-weight: 700; font-size: .9rem;
  text-transform: uppercase; letter-spacing: .06em;
}
.arc-talk-row .play{
  justify-self: end;
  width: 44px; height: 44px; border-radius: 50%;
  border: 2px solid var(--ink); display:grid; place-items:center;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.arc-talk-row:hover .play{ background: var(--red); border-color: var(--red); color:#fff; }
.arc-talk-row .play svg{ width: 16px; height: 16px; }
@media (max-width: 700px){
  .arc-talk-row{ grid-template-columns: 40px 1fr 44px; }
  .arc-talk-row .by{ display:none; }
}

/* ===== Talks subpage grid ===== */
.talks-grid{
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 36px 28px;
}
@media (max-width: 700px){ .talks-grid{ grid-template-columns: 1fr; gap: 28px; } }
.talk-card{ display: grid; gap: 16px; color: inherit; }
.talk-card .talk-meta{ display:grid; gap: 6px; }
.talk-card .idx{
  font-family: var(--serif); font-weight: 700; color: var(--red);
  font-size: .9rem; letter-spacing: .12em;
}
.talk-card h3{
  font-family: var(--serif); font-size: 1.55rem; line-height: 1.15; margin: 0;
  color: var(--ink);
}
.talk-card .author{
  color: var(--muted); font-weight: 800; text-transform: uppercase;
  letter-spacing: .06em; font-size: .85rem;
}
.talk-card p{ color: var(--ink-soft); margin: 6px 0 0; line-height: 1.5; }
.talk-card:hover h3{ color: var(--red); }

/* ===== People (speakers / performers) ===== */
.arc-people{
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
@media (max-width: 980px){ .arc-people{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .arc-people{ grid-template-columns: 1fr; } }
.arc-person{
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid; gap: 14px;
}
@media (max-width: 980px){ .arc-person:nth-child(2n){ border-right: 0; } }
@media (max-width: 560px){ .arc-person{ border-right: 0; } }
.arc-portrait{
  aspect-ratio: 1/1; overflow: hidden; border-radius: 2px;
  background: var(--ink); position: relative;
}
.arc-portrait img{ width:100%; height:100%; object-fit: cover; filter: grayscale(.6) contrast(1.05); transition: filter .4s ease, transform .6s ease; }
.arc-person:hover .arc-portrait img{ filter: grayscale(0) contrast(1.05); transform: scale(1.03); }
.arc-portrait .badge{
  position: absolute; top: 10px; left: 10px;
  font-family: var(--serif); font-weight: 700; font-size: .68rem;
  letter-spacing: .14em; text-transform: uppercase;
  color: #fff; background: rgba(0,0,0,.55); padding: 4px 8px;
  backdrop-filter: blur(4px);
}
.arc-person h4{
  font-family: var(--serif); font-size: 1.4rem; line-height: 1.1; margin: 0;
}
.arc-person .role{
  color: var(--red); font-weight: 800; text-transform: uppercase;
  letter-spacing: .08em; font-size: .76rem;
}
.arc-person .bio{
  color: var(--ink-soft); font-size: .95rem; line-height: 1.5;
}

/* ===== Team grid ===== */
.team-grid{
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
@media (max-width: 980px){ .team-grid{ grid-template-columns: repeat(4, 1fr); gap: 18px; } }
@media (max-width: 700px){ .team-grid{ grid-template-columns: repeat(3, 1fr); gap: 14px; } }
@media (max-width: 460px){ .team-grid{ grid-template-columns: repeat(2, 1fr); } }
.team-member{ display: grid; gap: 8px; }
.team-portrait{
  aspect-ratio: 1/1; border-radius: 50%; overflow: hidden;
  background: #d9d2c2; position: relative;
  display: grid; place-items: center;
}
.dark .team-portrait{ background: #2a261d; }
.team-portrait img{
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(.4) contrast(1.05);
  transition: filter .35s ease, transform .5s ease;
}
.team-member:hover .team-portrait img{ filter: none; transform: scale(1.04); }
.team-portrait .initials{
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  color: var(--muted); letter-spacing: .02em;
}
.team-meta h4{
  font-family: var(--serif); font-size: 1rem; line-height: 1.2; margin: 4px 0 0;
  font-weight: 700;
}
.team-role{
  color: var(--muted); font-size: .78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em;
}

/* ===== Discussions ===== */
.arc-discussions{
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border-top: 1px solid var(--line);
}
@media (max-width: 700px){ .arc-discussions{ grid-template-columns: 1fr; } }
.arc-discussion{
  padding: 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid; gap: 12px; align-content: start;
  position: relative;
}
@media (max-width: 700px){ .arc-discussion{ border-right: 0; } }
.arc-discussion .qmark{
  font-family: var(--serif); font-weight: 700;
  font-size: 4rem; line-height: 1; color: var(--red);
  margin-bottom: -8px;
}
.arc-discussion h4{
  font-family: var(--serif); font-size: 1.6rem; line-height: 1.15; margin: 0;
}
.arc-discussion .who{
  color: var(--muted); font-weight: 800; text-transform: uppercase;
  letter-spacing: .08em; font-size: .76rem;
}
.arc-discussion p{ color: var(--ink-soft); margin: 0; line-height: 1.55; }

/* ===== Photo strip (full-bleed within container) ===== */
.arc-photos{
  display: grid; grid-template-columns: 2fr 1fr 1fr; grid-template-rows: 1fr 1fr;
  gap: 8px; height: 560px;
}
@media (max-width: 700px){ .arc-photos{ grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr 1fr; height: 540px; } }
.arc-photo{ overflow: hidden; background: #ddd; position: relative; }
.arc-photo img{ width:100%; height:100%; object-fit: cover; transition: transform .6s ease; }
.arc-photo:hover img{ transform: scale(1.05); }
.arc-photo:nth-child(1){ grid-column: 1; grid-row: 1 / span 2; }
.arc-photo:nth-child(2){ grid-column: 2; grid-row: 1; }
.arc-photo:nth-child(3){ grid-column: 3; grid-row: 1; }
.arc-photo:nth-child(4){ grid-column: 2; grid-row: 2; }
.arc-photo:nth-child(5){ grid-column: 3; grid-row: 2; }
@media (max-width: 700px){
  .arc-photo:nth-child(1){ grid-column: 1 / -1; grid-row: 1; }
  .arc-photo:nth-child(2){ grid-column: 1; grid-row: 2; }
  .arc-photo:nth-child(3){ grid-column: 2; grid-row: 2; }
  .arc-photo:nth-child(4){ grid-column: 1; grid-row: 3; }
  .arc-photo:nth-child(5){ grid-column: 2; grid-row: 3; }
}

/* ===== Sponsors (paper grid) ===== */
.arc-tier{ margin-top: 36px; }
.arc-tier:first-child{ margin-top: 0; }
.arc-tier .tlabel{
  display: grid; grid-template-columns: auto 1fr auto; gap: 16px;
  align-items: center; margin-bottom: 18px;
  font-family: var(--serif); font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; font-size: .82rem;
  color: var(--muted);
}
.arc-tier .tlabel::after{ content:""; height: 1px; background: var(--line); }
.arc-tier .tlabel .count{ color: var(--ink); }
.arc-sponsor-row{
  display: grid; gap: 1px; background: var(--line);
  border: 1px solid var(--line);
}
.arc-sponsor-row.cols-2{ grid-template-columns: repeat(2, 1fr); }
.arc-sponsor-row.cols-3{ grid-template-columns: repeat(3, 1fr); }
.arc-sponsor-row.cols-4{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px){ .arc-sponsor-row{ grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px){ .arc-sponsor-row{ grid-template-columns: repeat(2, 1fr); } }
.arc-sponsor{
  background: #f4ede0;
  height: 140px; display:flex; align-items:center; justify-content:center;
  padding: 28px 36px; overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.arc-sponsor.large{ height: 180px; padding: 36px 48px; }
.arc-sponsor:hover{ transform: translateY(-2px); }
.arc-sponsor img{
  display:block; max-height: 100%; max-width: 100%;
  width:auto; height:auto; object-fit: contain;
  filter: grayscale(1) contrast(1.05); opacity: .85;
  transition: filter .25s ease, opacity .25s ease;
}
.arc-sponsor:hover img{ filter: none; opacity: 1; }
/* Dark mode keeps the logo cards on paper so logos stay readable */
.dark .arc-sponsor{ background: #f4ede0; }

/* ===== Venue ===== */
.arc-venue{
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 0;
  border: 1px solid var(--line);
}
@media (max-width: 980px){ .arc-venue{ grid-template-columns: 1fr; } }
.arc-venue .info{
  padding: 40px;
  border-right: 1px solid var(--line);
  display: grid; gap: 14px; align-content: center;
}
@media (max-width: 980px){ .arc-venue .info{ border-right: 0; border-bottom: 1px solid var(--line); } }
.arc-venue h3{ font-family: var(--serif); font-size: clamp(1.5rem, 2.5vw, 2rem); line-height: 1.1; margin: 0; }
.arc-venue .addr{ color: var(--muted); }
.arc-venue .map{ aspect-ratio: 16/10; }
.arc-venue iframe{ width:100%; height:100%; border:0; display:block; filter: grayscale(.4) contrast(1.05); }
.dark .arc-venue iframe{ filter: invert(.92) hue-rotate(180deg) grayscale(.3); }

/* ===== Archive index (year cards) ===== */
.year-tier-label{
  font-family: var(--serif); font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; font-size: .8rem; color: var(--muted);
  padding-bottom: 12px; border-bottom: 1px solid var(--line); margin-bottom: 20px;
}
.year-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.year-grid-featured{ grid-template-columns: 1fr; }
.year-grid-featured .year-card{ aspect-ratio: 21/9; }
@media (max-width: 980px){ .year-grid{ grid-template-columns: repeat(2, 1fr); } .year-grid-featured .year-card{ aspect-ratio: 16/10; } }
@media (max-width: 560px){ .year-grid{ grid-template-columns: 1fr; } .year-grid-featured .year-card{ aspect-ratio: 4/5; } }

.year-card{
  position: relative; display:block;
  aspect-ratio: 4/5; border-radius: 6px; overflow: hidden;
  color: #fff; isolation: isolate;
  transition: transform .25s ease, box-shadow .25s ease;
}
.year-card:hover{ transform: translateY(-4px); box-shadow: 0 24px 50px rgba(0,0,0,.18); }
.year-card-bg{
  position:absolute; inset:0; z-index:-2;
  background-size: cover; background-position: center;
  transform: scale(1.02); transition: transform .6s ease;
}
.year-card:hover .year-card-bg{ transform: scale(1.06); }
.year-card::after{
  content:""; position:absolute; inset:0; z-index:-1;
  background: linear-gradient(180deg, rgba(0,0,0,.05) 0%, rgba(0,0,0,.55) 60%, rgba(0,0,0,.85) 100%);
}
.year-card-content{
  position: absolute; inset: 0;
  display:flex; flex-direction:column; justify-content:flex-end;
  padding: 26px 28px; gap: 4px;
}
.year-card-meta{
  display:flex; gap: 12px; align-items:center; margin-bottom: 4px;
  font-family: var(--serif); font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; font-size: .72rem; color: rgba(255,255,255,.85);
}
.year-card-tag{
  background: var(--red); color: #fff; padding: 4px 10px; border-radius: 2px;
  letter-spacing: .14em;
}
.year-card-year{
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 5rem); line-height: .9;
}
.year-card-theme{
  font-family: var(--serif); font-weight: 500;
  font-size: clamp(1.2rem, 2vw, 1.7rem); line-height: 1.1;
  text-transform: lowercase; opacity: .92;
}
.year-card-cta{
  margin-top: 10px;
  font-family: var(--serif); font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; font-size: .78rem;
  color: #fff;
}
.year-card-cta.muted{ color: rgba(255,255,255,.55); }
.year-card-disabled{ pointer-events: none; opacity: .7; }

/* ===== Outro ===== */
.arc-outro{
  background: #0a0a0a; color: #efe7d8;
  padding: 90px 28px;
  text-align: center;
  display: grid; gap: 16px; place-items:center;
}
.arc-outro .stamp{
  font-family: var(--serif); font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  font-size: .78rem; color: var(--red);
}
.arc-outro h3{
  font-family: var(--serif);
  font-size: clamp(2rem, 4.5vw, 3.4rem); line-height: 1; margin: 0;
  color: #efe7d8;
}
.arc-outro p{ max-width: 60ch; color: rgba(239,231,216,.82); margin: 0 auto; }
.arc-outro .actions{ display:flex; gap: 12px; flex-wrap:wrap; justify-content:center; margin-top: 8px; }
.arc-outro .arc-btn{ background: var(--red); border-color: var(--red); color: #fff; }
.arc-outro .arc-btn.ghost{ background: transparent; color: #efe7d8; border-color: #efe7d8; }
.arc-outro .arc-btn.ghost:hover{ background: #efe7d8; color: #0a0a0a; }

/* ===== Footer (minimal, this microsite's own) ===== */
.arc-foot{
  padding: 28px;
  border-top: 1px solid var(--line);
  display:flex; justify-content:space-between; align-items:center; gap: 16px;
  font-size: .82rem; color: var(--muted);
  flex-wrap: wrap;
}
.arc-foot a{ color: var(--muted); }
.arc-foot a:hover{ color: var(--ink); }

/* Reveal */
.arc-reveal{ opacity: 0; transform: translateY(12px); transition: opacity .7s ease, transform .7s ease; }
.arc-reveal.on{ opacity: 1; transform: none; }

/* ===== Mobile fine-tuning ===== */
@media (max-width: 700px){
  .arc-top-inner{ padding: 12px 16px; gap: 12px; }
  .arc-mark{ font-size: .78rem; gap: 8px; }
  .arc-mark-yr{ font-size: .88rem; }
  .arc-logo{ height: 22px; }
  /* On small screens drop the middle "Archive" link and one slash to keep the bar tight */
  .arc-mark > .slash:first-of-type{ display: none; }
  .arc-mark .arc-mark-link:not(.arc-mark-yr){ display: none; }
  .arc-wrap{ padding: 0 18px; }
  .arc-ribbon{ font-size: .72rem; }
  .arc-hero{ padding: 40px 0 30px; }
  .arc-hero .grid{ gap: 24px; }
  .arc-hero h1{ font-size: clamp(3rem, 14vw, 5rem); }
  .arc-hero .lede{ font-size: 1.1rem; }
  .arc-hero .photo{ aspect-ratio: 4/3; }
  .arc-hero .yr-stamp{ font-size: 6rem; right: -6px; bottom: -10px; }
  .arc-section{ padding: 56px 0; }
  .arc-section .head{ margin-bottom: 32px; }
  .arc-num{ font-size: 2.4rem; }
  .arc-title{ font-size: 1.8rem; }
  .arc-talks-feature{ gap: 24px; margin-bottom: 36px; }
  .arc-feat-meta h3{ font-size: 1.4rem; }
  .arc-stat .num{ font-size: 1.6rem; }
  .arc-discussion{ padding: 22px; }
  .arc-discussion .qmark{ font-size: 3rem; }
  .arc-venue .info{ padding: 24px; }
  .arc-tier .tlabel{ font-size: .72rem; }
  .arc-sponsor{ height: 110px; padding: 20px; }
  .arc-sponsor.large{ height: 130px; padding: 24px; }
  .arc-foot{ flex-direction: column; align-items: flex-start; padding: 22px 18px; }
  .arc-outro{ padding: 56px 18px; }
  .arc-page{ padding-top: 56px; }
  .arc-drawer{ top: 56px; }
}
@media (prefers-reduced-motion: reduce){
  .arc-reveal{ transition: none; }
  .arc-ribbon .track{ animation: none; }
}