/* ============================================================
   Xinhua × CHOP — Pediatric CEUS Course
   Design: "Clinical Clarity" — clean, restrained, professional.
   One card style · one shadow scale · one blue-violet accent.
   Type: Hanken Grotesk (Latin) + Noto Sans SC / PingFang (CJK)
   ============================================================ */

@font-face {
  font-family: "Hanken Grotesk";
  src: url("fonts/hanken-latin.woff2") format("woff2");
  font-weight: 400 800; font-style: normal; font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Hanken Grotesk";
  src: url("fonts/hanken-latin-ext.woff2") format("woff2");
  font-weight: 400 800; font-style: normal; font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --bg:       #ffffff;
  --bg-soft:  #f5f6fc;
  --ink:      #131a3c;
  --ink-2:    #4c5478;
  --muted:    #8990ab;
  --line:     #ececf4;
  --chip:     #eef0fb;

  --brand:    #3a46bd;   /* refined indigo */
  --brand-2:  #7458d6;   /* violet */
  --brand-ink:#1b2350;   /* title navy */
  --brand-soft:#eef0fc;

  --radius:    22px;
  --radius-sm: 14px;
  --radius-lg: 28px;
  --shadow:    0 34px 64px -40px rgba(19,26,60,.32), 0 10px 24px -18px rgba(19,26,60,.12);
  --shadow-sm: 0 20px 44px -32px rgba(19,26,60,.28), 0 4px 12px -8px rgba(19,26,60,.08);

  --sans: "Hanken Grotesk", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", ui-sans-serif, -apple-system, sans-serif;
  --shell: min(1200px, calc(100vw - 48px));
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-width: 320px;
  background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
body.modal-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3 { margin: 0; letter-spacing: -.02em; }
::selection { background: rgba(111,91,216,.2); }

.sr-only, .honeypot {
  position: absolute !important; width: 1px !important; height: 1px !important;
  padding: 0 !important; margin: -1px !important; overflow: hidden !important;
  clip: rect(0,0,0,0) !important; white-space: nowrap !important; border: 0 !important;
}
.skip-link { position: fixed; left: 18px; top: -80px; z-index: 2000; background: #fff; color: var(--brand); padding: 10px 16px; border-radius: 12px; box-shadow: var(--shadow-sm); font-weight: 700; }
.skip-link:focus { top: 18px; }
.shell { width: var(--shell); margin-inline: auto; }

/* buttons ---------------------------------------------------- */
.button {
  border: 0; border-radius: 999px; min-height: 50px; padding: 0 24px;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-weight: 700; font-size: 15px; letter-spacing: .01em;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button svg { width: 18px; height: 18px; }
:focus-visible { outline: 3px solid rgba(111,91,216,.35); outline-offset: 3px; }
.button-small { min-height: 42px; padding: 0 20px; font-size: 14px; }
.button-primary { color: #fff; background: linear-gradient(120deg, var(--brand), var(--brand-2)); box-shadow: 0 16px 30px -14px rgba(76,78,190,.7); }
.button-primary:hover { box-shadow: 0 20px 38px -14px rgba(111,91,216,.7); }
.button-secondary { color: var(--brand); background: #fff; box-shadow: inset 0 0 0 1.5px var(--line); }
.button-secondary:hover { box-shadow: inset 0 0 0 1.5px rgba(111,91,216,.4); }
.button-secondary.dark { color: #fff; background: rgba(255,255,255,.12); box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.34); }
.button-light { background: #fff; color: var(--brand); }
.button-ghost-light { color: #fff; background: rgba(255,255,255,.12); box-shadow: inset 0 0 0 1.5px rgba(255,255,255,.4); }

/* header ----------------------------------------------------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 1000;
  background: rgba(255,255,255,.82); backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid var(--line);
}
.header-inner { min-height: 78px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 13px; min-width: 190px; }
.brand-badge { width: 44px; height: 44px; object-fit: contain; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; color: #fff; border-radius: 50%; background: linear-gradient(140deg, var(--brand), var(--brand-2)); }
.brand-mark svg { width: 26px; height: 26px; }
.brand strong { display: block; font-size: 17px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.brand strong span { font-weight: 500; color: var(--muted); margin: 0 3px; }
.brand small { display: block; margin-top: 1px; color: var(--muted); font-size: 10px; letter-spacing: .05em; text-transform: uppercase; }

/* official organiser logo lockup (from the poster) */
.org-lockup { display: flex; align-items: center; gap: 22px; margin-bottom: 26px; }
.org-lockup img { height: 38px; width: auto; }
.org-div { width: 1px; height: 32px; background: var(--line); }
.primary-nav { display: flex; justify-content: center; align-items: center; gap: 30px; }
.primary-nav a { position: relative; color: var(--ink-2); font-size: 14.5px; font-weight: 600; transition: color .2s ease; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--brand), var(--brand-2)); transition: right .25s ease; }
.primary-nav a:hover { color: var(--ink); }
.primary-nav a:hover::after { right: 0; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.language-toggle { border: 0; background: transparent; color: var(--brand); font-weight: 700; padding: 8px 6px; font-size: 14px; }
.menu-toggle { display: none; }

/* hero ------------------------------------------------------- */
.hero {
  position: relative; overflow: hidden; padding: 150px 0 0; isolation: isolate;
  background:
    radial-gradient(88% 120% at 85% 15%, rgba(253,238,215,.92) 0%, rgba(246,218,201,.5) 34%, transparent 62%),
    radial-gradient(82% 100% at 3% 24%, rgba(231,230,241,.95) 0%, rgba(240,225,234,.45) 48%, transparent 66%),
    radial-gradient(80% 82% at 44% 112%, rgba(236,204,213,.62) 0%, transparent 58%),
    linear-gradient(165deg, #eae7f3 0%, #f4edf1 40%, #faf3ee 68%, #fdf7f0 100%);
}
.hero-photo {
  position: absolute; top: 0; right: 0; bottom: 0; z-index: -1; width: min(62%, 1120px);
  background-image: url("hero.jpg");
  background-image: image-set(url("hero.webp") type("image/webp"), url("hero.jpg") type("image/jpeg"));
  background-repeat: no-repeat; background-position: right center; background-size: cover;
  -webkit-mask-image: linear-gradient(100deg, transparent 0%, #000 30%, #000 100%);
  mask-image: linear-gradient(100deg, transparent 0%, #000 30%, #000 100%);
}
/* child reaching for a heart — the poster's emotional signature, blended into the dawn */
.hero-child {
  position: absolute; left: -14px; bottom: 150px; z-index: -1; pointer-events: none;
  width: min(24%, 340px); aspect-ratio: 470 / 641;
  background: url("hero-child.webp") left bottom / contain no-repeat;
  opacity: .9;
}
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(100deg, rgba(250,245,245,.5) 32%, rgba(250,245,245,0) 60%); }
.hero-orbit, .hero-visual { display: none !important; }
.hero-grid { position: relative; display: block; }
.hero-copy { max-width: 700px; padding-bottom: 40px; }

.eyebrow-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.status-badge, .location-chip { display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; padding: 8px 14px; font-size: 12px; font-weight: 700; }
.status-badge { color: var(--brand-2); background: var(--brand-soft); }
.status-badge > span:first-child { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-2); }
.location-chip { color: var(--ink-2); background: var(--bg-soft); }
/* the hero uses only the kicker as an eyebrow; hide legacy badges cleanly */
.hero .eyebrow-row { display: none; }
.hero-kicker { margin: 0 0 20px; display: inline-block; color: var(--brand-2); font-weight: 700; letter-spacing: .02em; font-size: 14px; padding: 7px 15px; border-radius: 999px; background: var(--brand-soft); }

.hero h1 { font-weight: 800; font-size: clamp(36px, 4.2vw, 58px); line-height: 1.12; letter-spacing: -.035em; color: var(--brand-ink); }
.hero h1 > span { display: block; }
.gradient-text { color: transparent; -webkit-background-clip: text; background-clip: text; background-image: linear-gradient(100deg, var(--brand), var(--brand-2)); }
.hero-lead { max-width: 520px; margin: 22px 0 0; color: var(--ink-2); font-size: 17px; line-height: 1.75; }

.event-meta { display: flex; flex-wrap: wrap; gap: 12px 26px; margin: 26px 0 0; }
.meta-item { display: flex; align-items: center; gap: 11px; }
.meta-icon { flex: 0 0 40px; width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; color: var(--brand); background: var(--brand-soft); }
.meta-icon svg { width: 20px; height: 20px; }
.meta-item strong { display: block; font-size: 15px; color: var(--ink); }
.meta-item small { display: none; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }
.micro-note { display: none; }

/* feature cards (overlap hero bottom) ------------------------ */
.credibility-strip { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 36px; }
.feat-card { display: flex; align-items: flex-start; gap: 16px; padding: 26px; border-radius: var(--radius); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); transition: transform .25s ease, box-shadow .25s ease; }
.feat-card:hover { transform: translateY(-5px); box-shadow: 0 34px 60px -34px rgba(76,78,190,.4); }
.feat-ico { flex: 0 0 54px; width: 54px; height: 54px; display: grid; place-items: center; border-radius: 16px; color: var(--brand); background: var(--brand-soft); }
.feat-ico svg { width: 26px; height: 26px; }
.feat-card strong { display: block; font-size: 17px; font-weight: 700; color: var(--ink); }
.feat-card small { display: block; margin-top: 6px; color: var(--muted); font-size: 13.5px; line-height: 1.6; }

/* generic section ------------------------------------------- */
.section { padding: 96px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head .eyebrow { display: inline-flex; align-items: center; margin: 0 0 14px; color: var(--brand-2); font-weight: 700; font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase; }
.section-head .eyebrow::before, .venue-strip .eyebrow::before { content: ""; display: inline-block; width: 26px; height: 2px; margin-right: 11px; border-radius: 2px; background: linear-gradient(90deg, var(--brand), var(--brand-2)); }
.venue-strip .eyebrow { display: inline-flex; align-items: center; }
.section-head h2 { font-size: clamp(28px, 3.2vw, 42px); font-weight: 800; color: var(--ink); line-height: 1.16; }
.section-head p { margin: 14px 0 0; color: var(--ink-2); font-size: 16px; }

/* three-column board: speakers · highlights · schedule ------- */
.board { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 24px; }
.board-col { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow-sm); }
.col-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding-bottom: 20px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.col-head h3 { font-size: 20px; font-weight: 800; color: var(--ink); }
.col-head h3 span { font-weight: 500; color: var(--muted); font-size: 14px; margin-left: 4px; }
.col-link { color: var(--brand); font-size: 13px; font-weight: 700; display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; transition: gap .2s ease; }
.col-link:hover { gap: 9px; }

/* speakers */
.speaker { display: grid; grid-template-columns: 52px 1fr auto; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.speaker:last-child { border-bottom: 0; padding-bottom: 0; }
.speaker-avatar { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; background: linear-gradient(140deg, var(--brand-soft), #e6e3fb); display: grid; place-items: center; color: var(--brand); font-weight: 800; font-size: 16px; overflow: hidden; }
.speaker-avatar img { width: 100%; height: 100%; object-fit: cover; }
.speaker-avatar.muted { color: var(--muted); background: linear-gradient(140deg, #f1f2f7, #ece9f4); font-weight: 700; }
.speaker-name { font-size: 15px; font-weight: 700; color: var(--ink); }
.speaker-org { margin-top: 2px; font-size: 12px; color: var(--muted); line-height: 1.4; }
.speaker-tag { align-self: center; font-size: 11px; font-weight: 700; color: var(--brand-2); background: var(--brand-soft); padding: 5px 10px; border-radius: 999px; white-space: nowrap; }

/* highlights */
.hl-list { display: grid; gap: 20px; }
.hl-item { display: grid; grid-template-columns: 26px 1fr; gap: 12px; align-items: start; }
.hl-item .tick { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; color: var(--brand); background: var(--brand-soft); margin-top: 1px; }
.hl-item .tick svg { width: 15px; height: 15px; }
.hl-item p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.6; }

/* schedule */
.sched { display: grid; gap: 4px; }
.sched-row { display: grid; grid-template-columns: 74px 1fr; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.sched-row:last-child { border-bottom: 0; padding-bottom: 0; }
.sched-day { color: var(--brand); }
.sched-day strong { display: block; font-size: 15px; font-weight: 800; }
.sched-day small { display: block; margin-top: 2px; font-size: 12px; color: var(--muted); font-weight: 600; }
.sched-body strong { display: block; font-size: 15px; font-weight: 700; color: var(--ink); }
.sched-body small { display: block; margin-top: 3px; font-size: 12.5px; color: var(--muted); }

/* faculty ---------------------------------------------------- */
.faculty-head { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.faculty-head > div:first-child { max-width: 620px; }
.fac-tabs { display: flex; gap: 8px; padding: 5px; border-radius: 999px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.fac-tab {
  display: inline-flex; align-items: center; gap: 7px; border: 0; border-radius: 999px;
  padding: 10px 17px; background: transparent; color: var(--ink-2);
  font-size: 13.5px; font-weight: 700; white-space: nowrap;
  transition: background .2s ease, color .2s ease;
}
.fac-tab small { font-size: 11px; font-weight: 700; opacity: .55; font-variant-numeric: tabular-nums; }
.fac-tab:hover { color: var(--ink); background: var(--bg-soft); }
.fac-tab.active { color: #fff; background: linear-gradient(120deg, var(--brand), var(--brand-2)); box-shadow: 0 10px 20px -10px rgba(76,78,190,.6); }
.fac-tab.active small { opacity: .8; }

.faculty-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.fac-card {
  display: block; text-align: left; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; padding: 14px; box-shadow: var(--shadow-sm); cursor: pointer;
  transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s ease, border-color .25s ease;
}
.fac-card:hover { transform: translateY(-6px); border-color: rgba(111,91,216,.34); box-shadow: 0 32px 58px -34px rgba(76,78,190,.45); }
.fac-photo { display: block; position: relative; border-radius: 15px; overflow: hidden; background: var(--bg-soft); aspect-ratio: 1; }
.fac-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s cubic-bezier(.2,.8,.2,1); }
.fac-card:hover .fac-photo img { transform: scale(1.045); }
.fac-body { display: block; padding: 15px 4px 4px; }
.fac-name { display: block; font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: -.01em; }
.fac-cred { display: block; margin-top: 3px; font-size: 11.5px; font-weight: 700; color: var(--brand-2); }
.fac-role { display: block; margin-top: 8px; font-size: 12.5px; color: var(--ink-2); line-height: 1.5; }
.fac-org  { display: block; margin-top: 3px; font-size: 11.5px; color: var(--muted); line-height: 1.5; }

/* 两位主任独立一排 — 大卡，显著大于下方网格 */
.fac-chairs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; margin-bottom: 30px; }
.fac-chairs.single { grid-template-columns: minmax(0, 620px); }
.fac-card-chair {
  display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 24px; align-items: center;
  padding: 22px; border-radius: var(--radius-lg); border-color: rgba(111,91,216,.28);
  background: linear-gradient(120deg, #fff 58%, var(--brand-soft));
  box-shadow: 0 34px 64px -36px rgba(76,78,190,.45);
}
.fac-card-chair:hover { transform: translateY(-6px); box-shadow: 0 42px 74px -34px rgba(76,78,190,.55); }
.fac-card-chair .fac-photo { border-radius: 20px; }
.fac-card-chair .fac-body { padding: 0; }
.fac-card-chair .fac-name { font-size: clamp(21px, 1.85vw, 27px); line-height: 1.2; letter-spacing: -.025em; white-space: nowrap; }
.fac-card-chair .fac-cred { margin-top: 8px; font-size: 14px; }
.fac-card-chair .fac-role { margin-top: 18px; font-size: 16px; font-weight: 700; color: var(--ink); }
.fac-card-chair .fac-org { margin-top: 5px; font-size: 13px; }

/* faculty bio modal */
.fac-panel { width: min(680px, 100%); }
.fac-modal-head { display: grid; grid-template-columns: 132px 1fr; gap: 24px; align-items: center; padding-right: 44px; margin-bottom: 24px; }
.fac-modal-photo { width: 132px; height: 132px; border-radius: 20px; object-fit: cover; background: var(--bg-soft); }
.fac-modal-head h2 { margin: 9px 0 6px; font-size: 27px; font-weight: 800; color: var(--ink); letter-spacing: -.02em; }
.fac-modal-head p { margin: 0; color: var(--ink-2); font-size: 13.5px; line-height: 1.55; }
.fac-bio { list-style: none; padding: 22px 0 0; margin: 0; display: grid; gap: 13px; border-top: 1px solid var(--line); }
.fac-bio li { position: relative; padding-left: 22px; font-size: 14px; color: var(--ink-2); line-height: 1.68; }
.fac-bio li::before { content: ""; position: absolute; left: 2px; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: linear-gradient(120deg, var(--brand), var(--brand-2)); }

/* speaker preview rows (board column) */
.speaker {
  width: 100%; display: grid; grid-template-columns: 52px 1fr auto; align-items: center; gap: 14px;
  padding: 14px 0; text-align: left; background: none; border: 0; border-bottom: 1px solid var(--line); cursor: pointer;
}
.speaker:last-child { border-bottom: 0; padding-bottom: 0; }
.speaker:hover .speaker-name { color: var(--brand); }
.speaker-main { display: block; min-width: 0; }
.speaker-name { display: block; font-size: 15px; font-weight: 700; color: var(--ink); transition: color .2s ease; }
.speaker-org { display: block; margin-top: 2px; font-size: 12px; color: var(--muted); line-height: 1.45; }
.speaker-avatar { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; background: var(--bg-soft); padding: 0; }

/* participate ------------------------------------------------ */
.participation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.participation-card { position: relative; overflow: hidden; padding: 40px; border-radius: var(--radius-lg); }
.registration-card { background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-sm); color: var(--ink); }
.abstract-card { color: #fff; background: linear-gradient(140deg, var(--brand), var(--brand-2)); box-shadow: 0 30px 60px -34px rgba(76,78,190,.7); }
.card-label { display: inline-flex; padding: 7px 13px; border-radius: 999px; font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--brand); background: var(--brand-soft); }
.abstract-card .card-label { color: #fff; background: rgba(255,255,255,.16); }
.participation-card h3 { margin: 26px 0 12px; font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.participation-card > p { margin: 0; max-width: 460px; color: var(--ink-2); }
.abstract-card > p { color: rgba(255,255,255,.82); }
.participation-card ul { list-style: none; padding: 0; margin: 26px 0 34px; display: grid; gap: 12px; }
.participation-card li { position: relative; padding-left: 28px; font-size: 14px; }
.participation-card li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 12px; height: 7px; border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand); transform: rotate(-45deg); }
.abstract-card li::before { border-color: #fff; }
.privacy-callout { margin-top: 24px; display: flex; gap: 14px; align-items: flex-start; padding: 18px 20px; border-radius: var(--radius-sm); background: var(--bg-soft); border: 1px solid var(--line); }
.privacy-callout > span { flex: 0 0 26px; width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--brand); font-size: 14px; font-weight: 800; }
.privacy-callout p { margin: 0; color: var(--ink-2); font-size: 13px; }

/* venue strip ------------------------------------------------ */
.venue-strip { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.venue-strip h2 { font-size: clamp(26px, 3vw, 38px); font-weight: 800; color: var(--ink); }
.venue-strip .eyebrow { display: inline-block; margin-bottom: 12px; color: var(--brand-2); font-weight: 700; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.venue-strip > div:first-child > p { color: var(--ink-2); margin: 12px 0 0; }
.venue-details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.venue-details div { padding: 18px; border-radius: var(--radius-sm); background: #fff; border: 1px solid var(--line); }
.venue-details small { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .06em; }
.venue-details strong { display: block; margin-top: 6px; font-size: 14px; color: var(--ink); }

/* footer ----------------------------------------------------- */
.site-footer { padding: 70px 0 26px; color: #fff; background: linear-gradient(160deg, #232a63, #1a2350); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .7fr .9fr; gap: 56px; padding-bottom: 44px; }
.footer-brand .brand-mark { background: rgba(255,255,255,.12); }
.footer-brand .brand strong { color: #fff; }
.footer-brand .brand strong span { color: rgba(255,255,255,.6); }
.footer-brand .brand small { color: rgba(255,255,255,.55); }
.footer-brand > p { max-width: 380px; margin: 20px 0 0; color: rgba(255,255,255,.6); font-size: 13px; }
.footer-links, .footer-contact { display: grid; align-content: start; gap: 10px; }
.footer-links > strong, .footer-contact > strong { margin-bottom: 6px; color: rgba(255,255,255,.9); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.footer-links a, .footer-links button, .footer-contact p, .admin-link { color: rgba(255,255,255,.62); font-size: 13px; transition: color .2s ease; }
.footer-links a:hover, .footer-links button:hover, .admin-link:hover { color: #fff; }
.footer-links button { padding: 0; border: 0; background: transparent; text-align: left; }
.footer-contact p { margin: 0; }
.admin-link { margin-top: 8px; text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.46); font-size: 11px; }
.footer-bottom p { margin: 0; }

/* modals & forms -------------------------------------------- */
.modal { position: fixed; inset: 0; z-index: 1500; display: none; padding: 20px; overflow-y: auto; }
.modal.open { display: grid; place-items: start center; }
.modal-backdrop { position: fixed; inset: 0; background: rgba(26,35,80,.55); backdrop-filter: blur(8px); }
.modal-panel { position: relative; width: min(760px, 100%); margin: 24px auto; padding: 38px; border-radius: var(--radius-lg); background: #fff; box-shadow: 0 50px 110px -30px rgba(26,35,80,.5); animation: modalIn .28s cubic-bezier(.2,.8,.2,1) both; }
.modal-large { width: min(980px, 100%); }
@keyframes modalIn { from { opacity: 0; transform: translateY(20px) scale(.98); } to { opacity: 1; transform: none; } }
.modal-close { position: absolute; right: 20px; top: 18px; width: 40px; height: 40px; border: 0; border-radius: 50%; background: var(--bg-soft); color: var(--ink); font-size: 24px; line-height: 1; transition: background .2s ease, transform .2s ease; }
.modal-close:hover { background: var(--chip); transform: rotate(90deg); }
.modal-header { padding-right: 44px; margin-bottom: 28px; }
.modal-step { color: var(--brand-2); font-size: 10px; text-transform: uppercase; letter-spacing: .14em; font-weight: 700; }
.modal-header h2 { margin: 10px 0 8px; font-size: 30px; font-weight: 800; color: var(--ink); }
.modal-header p { margin: 0; color: var(--muted); font-size: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 17px; }
.field { display: grid; gap: 7px; align-content: start; }
.field-wide { grid-column: 1 / -1; }
.field > span { color: var(--ink-2); font-size: 13px; font-weight: 600; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-soft); color: var(--ink); padding: 13px 14px; transition: border-color .2s ease, box-shadow .2s ease, background .2s ease; }
.field input, .field select { min-height: 48px; }
.field textarea { resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--brand-2); background: #fff; box-shadow: 0 0 0 4px rgba(111,91,216,.12); outline: none; }
.field input[type="file"] { padding: 10px; }
.field-help { color: var(--muted); font-size: 11px; }
.consent { display: flex; align-items: flex-start; gap: 11px; margin: 22px 0; color: var(--ink-2); font-size: 12px; }
.consent input { margin-top: 3px; accent-color: var(--brand); }
.form-status { min-height: 22px; margin-bottom: 10px; font-size: 13px; }
.form-status.error { color: #c0435a; }
.form-status.info { color: var(--brand); }
.form-submit { min-width: 200px; }
.form-submit[disabled] { opacity: .7; cursor: progress; transform: none; }
.button-loader { display: none; width: 16px; height: 16px; border: 2px solid rgba(255,255,255,.45); border-top-color: #fff; border-radius: 50%; animation: spin .8s linear infinite; }
.form-submit[disabled] .button-loader { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
.success-panel { text-align: center; padding: 40px 10px 22px; }
.success-icon { width: 72px; height: 72px; display: grid; place-items: center; margin: 0 auto 20px; border-radius: 50%; color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-2)); font-size: 32px; font-weight: 900; }
.success-panel h3 { margin: 0 0 8px; font-size: 28px; font-weight: 800; }
.success-panel p { margin: 0; color: var(--muted); }
.success-id { display: block; margin: 18px auto 24px; color: var(--brand); font-size: 24px; font-weight: 800; letter-spacing: .06em; }

/* reveal ----------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.visible { opacity: 1; transform: none; }

/* responsive ------------------------------------------------- */
@media (max-width: 1080px) {
  .header-inner { grid-template-columns: auto auto 1fr; }
  .primary-nav { position: fixed; top: 79px; left: 24px; right: 24px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 12px; border-radius: 18px; background: rgba(255,255,255,.98); backdrop-filter: blur(18px); box-shadow: var(--shadow); }
  .primary-nav.open { display: flex; }
  .primary-nav a { padding: 13px; }
  .primary-nav a::after { display: none; }
  .menu-toggle { display: inline-grid; place-items: center; gap: 4px; width: 42px; height: 42px; border: 0; border-radius: 12px; background: var(--bg-soft); }
  .menu-toggle span:not(.sr-only) { width: 18px; height: 2px; background: var(--ink); border-radius: 3px; }
  .header-actions { justify-self: end; }
  .hero-child { display: none; }
  .hero-photo { width: 100%; opacity: .5; -webkit-mask-image: linear-gradient(180deg, #000, rgba(0,0,0,.4) 55%, transparent 86%); mask-image: linear-gradient(180deg, #000, rgba(0,0,0,.4) 55%, transparent 86%); }
  .hero::after { background: linear-gradient(180deg, rgba(255,255,255,.35), rgba(255,255,255,.8) 58%, #fff); }
  .hero-copy { max-width: none; text-align: center; margin-inline: auto; }
  .hero-kicker { margin-inline: auto; }
  .hero h1 { margin-inline: auto; }
  .hero-lead { margin-inline: auto; }
  .event-meta, .hero-actions { justify-content: center; }
  .board { grid-template-columns: 1fr; }
  .faculty-grid { grid-template-columns: repeat(3, 1fr); }
  .faculty-head { align-items: flex-start; }
  .fac-chairs { grid-template-columns: 1fr; }
  .board-col { max-width: 640px; margin-inline: auto; width: 100%; }
}
@media (max-width: 760px) {
  :root { --shell: min(100% - 32px, 1200px); }
  .site-header { position: absolute; background: rgba(255,255,255,.95); }
  .header-inner { min-height: 70px; gap: 10px; }
  .brand small { display: none; }
  .header-actions .button { display: none; }
  .hero { padding-top: 116px; }
  .hero h1 { font-size: clamp(29px, 8vw, 46px); }
  .hero-lead { font-size: 15.5px; }
  .credibility-strip { grid-template-columns: 1fr; gap: 16px; }
  .faculty-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .fac-chairs { grid-template-columns: 1fr; gap: 14px; margin-bottom: 14px; }
  .fac-card-chair { grid-template-columns: 1fr; gap: 16px; padding: 16px; }
  .fac-card-chair .fac-name { font-size: 22px; }
  .fac-card-chair .fac-cred { font-size: 13px; }
  .fac-card-chair .fac-role { margin-top: 12px; font-size: 14.5px; }
  .fac-card-chair .fac-org { font-size: 12.5px; }
  .fac-card { padding: 10px; }
  .fac-name { font-size: 14.5px; }
  .fac-role, .fac-org { font-size: 11.5px; }
  .fac-tabs { width: 100%; overflow-x: auto; }
  .fac-modal-head { grid-template-columns: 96px 1fr; gap: 16px; }
  .fac-modal-photo { width: 96px; height: 96px; }
  .fac-modal-head h2 { font-size: 22px; }
  .section { padding: 68px 0; }
  .participation-grid { grid-template-columns: 1fr; }
  .participation-card { padding: 30px; }
  .venue-strip { grid-template-columns: 1fr; gap: 26px; }
  .venue-details { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { display: block; }
  .footer-bottom p + p { margin-top: 6px; }
  .modal { padding: 8px; }
  .modal-panel { margin: 8px auto; padding: 26px 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}