/* Conference microsite design system */
:root {
  color-scheme: light;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #142039;
  --muted: #5e6a7d;
  --paper: #ffffff;
  --canvas: #f4f7fb;
  --line: #e1e7ef;
  --accent: #59d0ca;
  --accent-strong: #176f77;
  --accent-soft: #e4f7f5;
  --hero-image: none;
  --radius: 1.25rem;
  --shadow: 0 18px 50px rgba(19, 36, 66, .09);
  --nav-height: 5.25rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 1rem); }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 1rem; line-height: 1.7; }
img { max-width: 100%; height: auto; }
a { color: var(--accent-strong); text-underline-offset: .18em; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--accent-strong); outline-offset: 3px; }
.site-nav :focus-visible, .hero :focus-visible, .site-footer :focus-visible { outline-color: #fff; }
.skip-link { position: fixed; top: .5rem; left: .5rem; z-index: 2000; padding: .7rem 1rem; border-radius: .5rem; background: #fff; color: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-nav { position: fixed; inset: 0 0 auto; z-index: 1030; min-height: var(--nav-height); background: rgba(7, 14, 31, .82); border-bottom: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(16px); }
.site-nav .container { min-height: var(--nav-height); }
.navbar-brand { display: inline-flex; align-items: center; gap: .75rem; color: #fff !important; font-size: 1.08rem; font-weight: 750; letter-spacing: -.025em; }
.brand-mark { display: grid; width: 2.65rem; height: 2.65rem; place-items: center; border: 1px solid rgba(255,255,255,.38); border-radius: .85rem; background: rgba(255,255,255,.04); color: #fff; font-size: .83rem; font-weight: 800; letter-spacing: .02em; }
.brand-label small { display: block; margin-top: -.2rem; color: rgba(255,255,255,.65); font-size: .66rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.navbar-nav { gap: .15rem; }
.site-nav .nav-link { padding: .55rem .7rem !important; border-radius: .5rem; color: rgba(255,255,255,.78); font-size: .88rem; font-weight: 600; transition: background .2s ease, color .2s ease; }
.site-nav .nav-link:hover, .site-nav .nav-link:focus-visible { background: rgba(255,255,255,.12); color: #fff; }
.navbar-toggler { border-color: rgba(255,255,255,.4); }
.navbar-toggler:focus { box-shadow: 0 0 0 .2rem rgba(255,255,255,.22); }
.hero { position: relative; display: flex; min-height: min(900px, 100svh); align-items: center; overflow: hidden; padding: calc(var(--nav-height) + 3.5rem) 0 5.5rem; background-color: #0a1228; background-image: linear-gradient(90deg, rgba(6, 12, 28, .95) 0%, rgba(6, 12, 28, .82) 38%, rgba(6, 12, 28, .18) 100%), linear-gradient(0deg, rgba(6, 12, 28, .42), transparent 45%), var(--hero-image); background-position: center; background-size: cover; color: #fff; }
.hero__inner { position: relative; z-index: 1; }
.hero__content { max-width: 760px; }
.hero__eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem; margin: 0 0 1.25rem; color: rgba(255,255,255,.82); font-size: .9rem; font-weight: 650; letter-spacing: .045em; }
.hero__badge { display: inline-flex; align-items: center; gap: .45rem; padding: .38rem .72rem; border: 1px solid rgba(255,255,255,.27); border-radius: 999px; background: rgba(255,255,255,.1); color: #fff; font-size: .75rem; letter-spacing: .09em; text-transform: uppercase; }
.hero h1 { max-width: 12ch; margin: 0; color: #fff; font-size: clamp(3.6rem, 8vw, 7.2rem); font-weight: 800; letter-spacing: -.075em; line-height: .98; }
.hero__lead { max-width: 40rem; margin: 1.45rem 0 .6rem; color: rgba(255,255,255,.94); font-size: clamp(1.25rem, 2.5vw, 1.8rem); font-weight: 550; line-height: 1.35; }
.hero__place { margin: 0; color: rgba(255,255,255,.75); font-size: 1rem; }
.hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: .85rem; margin-top: 2rem; }
.hero__status { display: inline-flex; align-items: center; gap: .6rem; min-height: 3.15rem; padding: .75rem 1rem; border: 1px solid rgba(255,255,255,.28); border-radius: .75rem; background: rgba(255,255,255,.1); color: #fff; font-size: .92rem; font-weight: 700; }
.hero__status i { color: var(--accent); }
.portal-status { display: flex; align-items: flex-start; gap: .8rem; margin: 1rem 0 0; padding: 1rem; border: 1px dashed var(--line); border-radius: .8rem; background: var(--canvas); color: var(--ink); }
.portal-status i { margin-top: .32rem; color: var(--accent-strong); }
.portal-status span { color: var(--ink); }
.btn { border-radius: .75rem; padding: .85rem 1.2rem; font-weight: 700; }
.btn-primary { border-color: var(--accent-strong); background: var(--accent-strong); color: #fff; box-shadow: none; }
.btn-primary:hover, .btn-primary:focus { border-color: var(--accent); background: var(--accent); color: #102036; }
.btn-outline-light { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-outline-light:hover { background: #fff; color: #132039; }
.btn-outline-primary { border-color: var(--accent-strong); color: var(--accent-strong); }
.btn-outline-primary:hover { border-color: var(--accent-strong); background: var(--accent-strong); color: #fff; }
.section { position: relative; padding: clamp(4.2rem, 8vw, 7.4rem) 0; scroll-margin-top: calc(var(--nav-height) + .8rem); }
.section--mist { background: var(--canvas); }
.section--deep { background: #101b33; color: #eaf0f8; }
.section-heading { max-width: 780px; margin-bottom: 2.4rem; }
.eyebrow { margin: 0 0 .55rem; color: var(--accent-strong); font-size: .76rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.section--deep .eyebrow { color: var(--accent); }
.section-heading h2 { margin: 0; color: var(--ink); font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 780; letter-spacing: -.055em; line-height: 1.12; }
.section--deep .section-heading h2 { color: #fff; }
.section-heading p:not(.eyebrow) { margin: 1rem 0 0; color: var(--muted); font-size: 1.08rem; }
.section--deep .section-heading p:not(.eyebrow) { color: rgba(234,240,248,.75); }
.intro-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); align-items: start; gap: clamp(2rem, 5vw, 5rem); }
.intro-copy { color: var(--muted); font-size: 1.12rem; }
.intro-copy p:first-child { margin-top: 0; }
.topic-panel, .content-card, .person-card, .date-card, .contact-card, .archive-card { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.topic-panel { padding: clamp(1.3rem, 3vw, 2rem); }
.topic-panel h3, .content-card h3, .contact-card h3 { margin: 0 0 1rem; font-size: 1.08rem; font-weight: 750; letter-spacing: -.02em; }
.topic-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem 1.2rem; margin: 0; padding: 0; list-style: none; }
.topic-list li { position: relative; padding-left: 1.1rem; color: #46546b; font-size: .92rem; line-height: 1.45; }
.topic-list li::before { position: absolute; top: .46em; left: 0; width: .45rem; height: .45rem; border-radius: 50%; background: var(--accent); content: ""; }
.content-card { height: 100%; padding: clamp(1.4rem, 3vw, 2.2rem); }
.content-card p { color: var(--muted); }
.content-card ul { padding-left: 1.2rem; color: var(--muted); }
.content-card li + li { margin-top: .35rem; }
.card-icon { display: grid; width: 3rem; height: 3rem; margin-bottom: 1.1rem; place-items: center; border-radius: .9rem; background: var(--accent-soft); color: var(--accent-strong); font-size: 1.15rem; }
.inline-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.35rem; }
.dates-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1rem; }
.date-card { min-height: 175px; padding: 1.25rem; }
.date-card__label { display: block; margin-bottom: 1.3rem; color: var(--muted); font-size: .78rem; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; }
.date-card time { display: block; color: var(--ink); font-size: clamp(1.05rem, 1.6vw, 1.3rem); font-weight: 760; line-height: 1.3; }
.date-card--event { border-color: color-mix(in srgb, var(--accent) 48%, var(--line)); background: linear-gradient(145deg, var(--accent-soft), #fff 80%); }
.date-card--event .date-card__label { color: var(--accent-strong); }
.committee-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 1.2rem; }
.person-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; }
.person-card { display: flex; min-height: 105px; align-items: center; gap: .85rem; padding: 1rem; box-shadow: none; }
.person-mark { display: grid; flex: 0 0 2.7rem; width: 2.7rem; height: 2.7rem; place-items: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent-strong); font-size: .75rem; font-weight: 800; }
.person-card strong { display: block; color: var(--ink); font-size: .96rem; line-height: 1.3; }
.person-card small { display: block; margin-top: .28rem; color: var(--muted); font-size: .78rem; line-height: 1.4; }
.announcement { display: flex; align-items: center; gap: 1rem; padding: 1.35rem; border: 1px dashed color-mix(in srgb, var(--accent-strong) 42%, var(--line)); border-radius: 1rem; background: var(--accent-soft); color: var(--ink); }
.announcement i { color: var(--accent-strong); font-size: 1.3rem; }
.announcement p { margin: 0; color: #43516a; }
.archive-banner { padding: .85rem 0; border-bottom: 1px solid var(--line); background: var(--accent-soft); color: var(--ink); }
.archive-banner .container { display: flex; flex-wrap: wrap; gap: .5rem 1rem; align-items: baseline; }
.archive-banner strong { color: var(--accent-strong); font-size: .78rem; letter-spacing: .09em; text-transform: uppercase; }
.archive-banner span { color: var(--muted); font-size: .9rem; }
.archive { margin-top: 1.4rem; border: 1px solid var(--line); border-radius: 1rem; background: #fff; }
.archive summary { padding: 1rem 1.2rem; color: var(--accent-strong); cursor: pointer; font-weight: 750; }
.archive__body { padding: 0 1.2rem 1.3rem; }
.archive__body p { color: var(--muted); }
.speaker-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.speaker-card { display: flex; align-items: center; gap: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--canvas); }
.speaker-card img { width: 5rem; height: 5rem; flex: 0 0 5rem; border-radius: .8rem; object-fit: cover; }
.speaker-card strong { display: block; color: var(--ink); }
.speaker-card small { display: block; margin-top: .3rem; color: var(--muted); font-size: .8rem; line-height: 1.4; }
.venue-panel { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1.5rem; padding: clamp(1.5rem, 3.5vw, 2.5rem); border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.venue-panel address { margin: .5rem 0 0; color: var(--muted); font-style: normal; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); gap: 1rem; }
.contact-card { padding: 1.3rem; box-shadow: none; }
.contact-card p { overflow-wrap: anywhere; margin: .35rem 0 0; color: var(--muted); font-size: .94rem; }
.contact-form { padding: clamp(1.3rem, 3vw, 2rem); border-radius: var(--radius); background: #fff; color: var(--ink); }
.contact-form label { display: block; margin: .8rem 0 .35rem; font-size: .88rem; font-weight: 700; }
.contact-form .form-control { min-height: 3rem; border-color: #d5deea; border-radius: .7rem; padding: .75rem .9rem; }
.contact-form textarea.form-control { min-height: 135px; }
.form-status { min-height: 1.5rem; margin: .8rem 0 0; color: var(--muted); font-size: .9rem; }
.form-status--error { color: #a32626; }
.form-status--success { color: #116a4b; }
.video-frame { position: relative; overflow: hidden; aspect-ratio: 16 / 9; border-radius: var(--radius); background: #07101d; box-shadow: var(--shadow); }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.history-list { display: flex; flex-wrap: wrap; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.history-list a { display: inline-flex; padding: .52rem .8rem; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: var(--ink); font-size: .88rem; font-weight: 650; text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
.history-list a:hover { border-color: var(--accent); transform: translateY(-2px); }
.site-footer { padding: 2rem 0; background: #081225; color: rgba(255,255,255,.7); font-size: .86rem; }
.site-footer a { color: #fff; }
.site-footer p { margin: 0; }
.site-footer .photo-credit { font-size: .75rem; }
@media (max-width: 1199.98px) {
  .dates-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .site-nav .navbar-collapse { max-height: calc(100svh - var(--nav-height)); max-height: calc(100dvh - var(--nav-height)); overflow-y: auto; overscroll-behavior: contain; margin: .2rem -1rem 0; padding: .7rem 1rem 1rem; border-top: 1px solid rgba(255,255,255,.13); background: rgba(7,14,31,.98); }
  .site-nav .nav-link { padding: .65rem .8rem !important; }
}
@media (max-width: 991.98px) {
  .intro-layout, .committee-grid { grid-template-columns: 1fr; }
  .hero { min-height: 760px; background-position: 58% center; }
}
@media (max-width: 767.98px) {
  :root { --nav-height: 4.6rem; }
  .hero { min-height: 720px; padding-bottom: 4rem; background-image: linear-gradient(90deg, rgba(6,12,28,.91), rgba(6,12,28,.65)), linear-gradient(0deg, rgba(6,12,28,.4), transparent), var(--hero-image); background-position: 60% center; }
  .hero h1 { font-size: clamp(3.2rem, 16vw, 5rem); }
  .hero__eyebrow { font-size: .78rem; }
  .hero__actions > * { width: 100%; justify-content: center; }
  .topic-list { grid-template-columns: 1fr; }
  .dates-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .date-card { min-height: 145px; }
  .person-list, .speaker-grid, .contact-grid { grid-template-columns: 1fr; }
  .venue-panel { grid-template-columns: 1fr; }
}
@media (max-width: 420px) { .dates-grid { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* AREdu 2026 theme */
:root { --hero-image: url("https://images.unsplash.com/photo-1710740355495-7c45561b0a6d?fit=crop&fm=webp&q=75&w=1920"); --accent: #b4a6d2; --accent-strong: #655781; --accent-soft: #f0edf5; }