/* ============================================================
     PROMO — above-the-fold conference banner + schedule + keynotes
     ============================================================ */
  .promo{ position: relative; z-index: 3; padding: clamp(26px,3.6vw,48px) 0 clamp(6px,1.4vw,14px); }
  .promo-eyebrow{
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin: 0 0 clamp(16px,2.4vw,26px);
    font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em;
    text-transform: uppercase; color: var(--ink-soft);
  }
  .promo-eyebrow .dot{ width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 8px var(--signal); }
  .pixel{ margin: 0; font-family: 'Press Start 2P', var(--font-mono); line-height: 1.08; letter-spacing: 0; }
  .pixel .l1, .pixel .l2{ display: block; font-size: clamp(26px,7.4vw,76px); }
  .pixel .l1{ color: var(--ink); text-shadow: 3px 3px 0 rgba(239,234,224,.07); }
  .pixel .l2{ color: var(--signal); text-shadow: 3px 3px 0 rgba(200,53,31,.45), 0 0 28px rgba(255,89,69,.30); margin-top: .2em; }
  .promo-dates{
    display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin: clamp(18px,2.2vw,26px) 0 0;
    font-family: var(--font-mono); font-size: clamp(12px,1.3vw,15px);
    letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft);
    border: 1px solid rgba(255,89,69,.45); background: rgba(255,89,69,.07);
    padding: 10px 15px; border-radius: 6px;
  }
  .promo-dates b{ color: var(--signal); font-weight: 700; letter-spacing: .1em; }
  .promo-tag{ margin: clamp(18px,2.4vw,28px) 0 0; max-width: 56ch; color: var(--ink-soft); font-size: clamp(15px,1.15vw,18px); line-height: 1.55; }
  .promo-tag b{ color: var(--ink); font-weight: 600; }
  .promo-ctas{ display: flex; gap: 12px; flex-wrap: wrap; margin-top: clamp(22px,2.8vw,32px); }
  .promo-btn{
    display: inline-flex; align-items: center; gap: 10px;
    padding: 13px 20px; border-radius: 6px;
    font-family: var(--font-sans); font-weight: 600; font-size: 14px;
    cursor: pointer; text-decoration: none;
    transition: transform var(--dur-micro) var(--ease-out-soft),
                background var(--dur-base) var(--ease-out-soft),
                border-color var(--dur-base) var(--ease-out-soft);
  }
  .promo-btn .arrow{ color: var(--signal); }
  .promo-btn.primary{ background: var(--ink); color: var(--pitch); border: 1px solid var(--ink); }
  .promo-btn.primary:hover{ background: #fff; transform: translateY(-1px); }
  .promo-btn.ghost{ background: rgba(255,255,255,.03); color: var(--ink); border: 1px solid var(--line-strong); }
  .promo-btn.ghost:hover{ border-color: var(--ink-soft); transform: translateY(-1px); }

  /* schedule + keynotes shared section heads */
  .sched, .keynotes{ margin-top: clamp(34px,4vw,56px); border-top: 1px solid var(--line); padding-top: clamp(22px,2.8vw,34px); }
  .sec-head{ display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: clamp(16px,2vw,24px); }
  .sec-head h2{ margin: 0; font-size: clamp(22px,2.6vw,34px); font-weight: 600; letter-spacing: -.022em; color: var(--ink); }
  .sec-head .meta{ font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-soft); }

  .sched-grid{ display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
  .day{ border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.02); padding: clamp(16px,1.8vw,22px); display: flex; flex-direction: column; gap: 10px; }
  .day .num{ align-self: flex-start; font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em; color: var(--signal); border: 1px solid rgba(255,89,69,.35); background: rgba(255,89,69,.06); padding: 3px 8px; border-radius: 4px; }
  .day.tour .num{ color: var(--cool); border-color: rgba(90,155,255,.4); background: rgba(90,155,255,.07); }
  .day h3{ margin: 2px 0 0; font-size: clamp(17px,1.5vw,20px); font-weight: 600; color: var(--ink); letter-spacing: -.01em; }
  .day p{ margin: 0; color: var(--ink-soft); font-size: 14px; line-height: 1.5; }
  .day ul{ margin: 4px 0 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 7px; }
  .day li{ font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; color: var(--ink-soft); display: flex; gap: 8px; line-height: 1.4; }
  .day li::before{ content: "▸"; color: var(--ink-faint); }
  .day li.kbadge::before{ content: "★"; color: var(--signal); }
  .day li.kbadge{ color: var(--ink); }

  .kgrid{ display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
  .kcard{ border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.02); padding: clamp(16px,1.6vw,20px); display: flex; flex-direction: column; gap: 12px; min-height: 168px; }
  .kcard .knum{ font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em; color: var(--ink-faint); }
  /* headshot: layered background — photo on top, Algorithmacy logo mark beneath.
     If the photo file is missing/404s (or no --photo is set), that layer silently
     doesn't paint and the logo shows through (no broken-image icon). Set --photo per card. */
  .kface{
    width: 48px; height: 48px; border-radius: 8px; border: 1px solid var(--line-strong);
    background-color: rgba(255,89,69,.07);
    background-image: var(--photo, none),
      url('/images/logo-mark.svg');
    background-size: cover, 60%;
    background-position: center, center;
    background-repeat: no-repeat, no-repeat;
  }
  .kcard-cta{ border-color: rgba(255,89,69,.4); background: rgba(255,89,69,.05); }
  .kmail{ margin-top: 4px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; color: var(--signal); text-decoration: none; }
  .kmail:hover{ text-decoration: underline; text-underline-offset: 3px; }
  .kcard .kname{ margin: auto 0 0; color: var(--ink); font-weight: 600; font-size: 16px; text-decoration: none; }
  a.kname:hover{ text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 3px; }
  .kcard .kaff{ font-family: var(--font-mono); font-size: 11px; color: var(--ink-soft); letter-spacing: .04em; line-height: 1.45; min-height: 2.9em; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; overflow: hidden; }
  .kcard .ktba{ align-self: flex-start; font-family: var(--font-mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; color: var(--signal); border: 1px dashed rgba(255,89,69,.4); padding: 3px 8px; border-radius: 4px; }
  .kcard .kds{ align-self: flex-start; font-family: var(--font-mono); font-size: 9px; letter-spacing: .14em; text-transform: uppercase; color: var(--signal); background: rgba(255,89,69,.08); border: 1px solid rgba(255,89,69,.3); padding: 4px 8px; border-radius: 4px; }

  /* clickable special-session card → submission page */
  a.kcard-session{ text-decoration: none; transition: border-color .15s ease, background .15s ease, transform .15s ease; }
  a.kcard-session:hover{ border-color: rgba(255,89,69,.5); background: rgba(255,89,69,.04); transform: translateY(-2px); }
  a.kcard-session .kname{ color: var(--ink); }

  /* partners — prominent feature card (opens the deck modal) */
  .partner-feature{
    display: grid;
    grid-template-columns: 64px 1fr auto;
    align-items: center;
    gap: 20px;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font: inherit;
    color: var(--ink);
    border: 1px solid rgba(255,89,69,.35);
    background: rgba(255,89,69,.05);
    border-radius: 12px;
    padding: clamp(18px,2vw,26px);
    transition: border-color .15s ease, background .15s ease, transform .15s ease;
  }
  .partner-feature:hover{ border-color: rgba(255,89,69,.6); background: rgba(255,89,69,.09); transform: translateY(-2px); }
  .partner-feature__mark{
    width: 64px; height: 64px; border-radius: 10px; border: 1px solid var(--line-strong);
    background-color: rgba(255,255,255,.04);
    background-image: var(--photo, none);
    background-size: cover; background-position: center; background-repeat: no-repeat;
  }
  .partner-feature__body{ display: flex; flex-direction: column; gap: 6px; min-width: 0; }
  .partner-feature__name{ font-size: 20px; font-weight: 600; letter-spacing: -0.01em; color: var(--ink); }
  .partner-feature__desc{ font-size: 13.5px; line-height: 1.55; color: var(--ink-soft); max-width: 62ch; }
  .partner-feature__cta{ font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--signal); white-space: nowrap; }
  @media (max-width: 620px){
    .partner-feature{ grid-template-columns: 52px 1fr; row-gap: 12px; }
    .partner-feature__mark{ width: 52px; height: 52px; }
    .partner-feature__cta{ grid-column: 1 / -1; }
  }

  /* accepted papers */
  .accepted-intro{ margin: 0 0 18px; max-width: 70ch; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
  .accepted-intro b{ color: var(--ink); font-weight: 600; }
  .accepted-empty{ font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-faint); }
  .accepted-empty a{ color: var(--signal); }
  .pgrid{ display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
  .pcard{
    display: flex; flex-direction: column; gap: 9px;
    border: 1px solid var(--line); border-radius: 8px;
    background: rgba(255,255,255,.02); padding: clamp(16px,1.6vw,20px);
    text-decoration: none; transition: border-color .15s ease, background .15s ease, transform .15s ease;
  }
  .pcard:hover{ border-color: rgba(255,89,69,.5); background: rgba(255,89,69,.04); transform: translateY(-2px); }
  .pcard-top{ display: flex; align-items: center; gap: 8px; }
  .pcard-track{ font-family: var(--font-mono); font-size: 10px; letter-spacing: .18em; color: var(--signal); border: 1px solid rgba(255,89,69,.3); background: rgba(255,89,69,.08); padding: 2px 7px; border-radius: 4px; }
  .pcard-type{ font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-faint); }
  .pcard-title{ margin: 0; font-size: 16px; font-weight: 600; line-height: 1.25; color: var(--ink); }
  .pcard-authors{ margin: 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: .03em; color: var(--ink-soft); }
  .pcard-teaser{ margin: 0; font-size: 13px; line-height: 1.5; color: var(--ink-soft); }
  .pcard-link{ margin-top: auto; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--signal); }

  @media (max-width: 760px){
    .sched-grid{ grid-template-columns: 1fr; }
    .kgrid{ grid-template-columns: 1fr 1fr; }
    .pgrid{ grid-template-columns: 1fr; }
    .promo-btn{ flex: 1 1 auto; justify-content: center; }
  }
  @media (max-width: 440px){
    .kgrid{ grid-template-columns: 1fr; }
  }