:root {
  --blue-start: #3e6fb0;
  --blue-end: #73b4d4;
  --violet-start: #3e00f9;
  --violet-end: #7400fa;
  --white: #fff;
  --background: #f6f8fc;
  --surface-soft: #eef4fa;
  --blue-soft: #eef6fb;
  --violet-soft: #f3efff;
  --gradient-blue-soft: linear-gradient(135deg, rgba(62,111,176,.12), rgba(115,180,212,.20));
  --gradient-violet-soft: linear-gradient(135deg, rgba(62,0,249,.08), rgba(116,0,250,.15));
  --text: #172033;
  --text-soft: #657085;
  --border: #dfe6f0;
  --gradient-blue: linear-gradient(135deg, var(--blue-start), var(--blue-end));
  --gradient-violet: linear-gradient(135deg, var(--violet-start), var(--violet-end));
  --shadow: 0 18px 45px rgba(34, 55, 91, .09);
  --shadow-hover: 0 22px 55px rgba(62, 0, 249, .12);
  --radius-sm: 14px;
  --radius: 24px;
  --radius-lg: 38px;
  --container: 1240px;
  --header-height: 148px;
  --font: "Manrope", "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body { margin: 0; overflow-x: hidden; color: var(--text); background: var(--white); font-family: var(--font); line-height: 1.65; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 3px solid rgba(62, 0, 249, .38); outline-offset: 4px; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 16px; border-radius: 10px; background: var(--text); color: #fff; transition: top .2s; }
.skip-link:focus { top: 14px; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.section { padding: clamp(72px, 9vw, 128px) 0; }
.section-soft { background: linear-gradient(145deg, var(--blue-soft) 0%, #f8f5ff 52%, var(--violet-soft) 100%); }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 14px; color: var(--violet-start); font-size: .74rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { width: 28px; height: 2px; content: ""; background: var(--gradient-violet); }
.section-title { max-width: 760px; margin: 0; font-size: clamp(2rem, 4vw, 3.7rem); line-height: 1.08; letter-spacing: -.045em; }
.section-lead { max-width: 710px; margin: 22px 0 0; color: var(--text-soft); font-size: clamp(1rem, 1.5vw, 1.14rem); }
.section-heading { margin-bottom: clamp(36px, 5vw, 64px); }
.gradient-text { color: var(--violet-start); background: var(--gradient-violet); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; height: var(--header-height); border-bottom: 1px solid transparent; background: rgba(255,255,255,.88); backdrop-filter: blur(18px); transition: box-shadow .25s, border-color .25s; }
.site-header.scrolled { border-color: rgba(223,230,240,.85); box-shadow: 0 8px 30px rgba(23,32,51,.07); }
.nav-wrap { display: flex; height: 100%; align-items: center; justify-content: space-between; gap: 28px; }
.brand { flex: 0 0 auto; }
.brand img { width: 150px; height: 127px; object-fit: contain; }
.nav-list { display: flex; align-items: center; gap: clamp(13px, 1.7vw, 28px); margin: 0; padding: 0; list-style: none; }
.nav-link { position: relative; color: #39445a; font-size: .79rem; font-weight: 700; white-space: nowrap; }
.nav-link:not(.nav-cta)::after { position: absolute; right: 0; bottom: -8px; left: 0; height: 2px; content: ""; transform: scaleX(0); background: var(--gradient-blue); transition: transform .2s; }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--violet-start); }
.nav-link.nav-cta.active { color: #fff; }
.nav-cta { padding: 11px 17px; border-radius: 999px; color: #fff; background: var(--gradient-violet); box-shadow: 0 8px 20px rgba(62,0,249,.2); }
.menu-toggle { display: none; width: 48px; height: 48px; align-items: center; justify-content: center; border: 0; border-radius: 14px; background: var(--background); cursor: pointer; }
.menu-icon, .menu-icon::before, .menu-icon::after { display: block; width: 22px; height: 2px; border-radius: 2px; background: var(--text); transition: transform .25s, opacity .25s; }
.menu-icon { position: relative; }
.menu-icon::before, .menu-icon::after { position: absolute; left: 0; content: ""; }
.menu-icon::before { top: -7px; }
.menu-icon::after { top: 7px; }
.menu-toggle[aria-expanded="true"] .menu-icon { background: transparent; }
.menu-toggle[aria-expanded="true"] .menu-icon::before { top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon::after { top: 0; transform: rotate(-45deg); }

/* Buttons */
.button-row { display: flex; flex-wrap: wrap; gap: 13px; }
.btn { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 10px; padding: 13px 23px; border: 1px solid transparent; border-radius: 999px; font-size: .82rem; font-weight: 800; letter-spacing: .035em; text-transform: uppercase; transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: var(--gradient-violet); box-shadow: 0 12px 28px rgba(62,0,249,.22); }
.btn-secondary { color: #fff; background: var(--gradient-blue); box-shadow: 0 12px 28px rgba(62,111,176,.2); }
.btn-outline { border-color: rgba(62,0,249,.28); color: var(--violet-start); background: #fff; }

/* Home hero */
.hero { position: relative; isolation: isolate; overflow: hidden; padding: clamp(48px, 7vw, 92px) 0 78px; background: radial-gradient(circle at 14% 20%,rgba(115,180,212,.26),transparent 30%), radial-gradient(circle at 83% 60%,rgba(116,0,250,.15),transparent 34%), linear-gradient(160deg,#fff 0%,#f1f7fd 48%,#f6f1ff 100%); }
.hero::before, .hero::after { position: absolute; z-index: -1; border-radius: 50%; content: ""; filter: blur(4px); }
.hero::before { width: 390px; height: 390px; top: -190px; right: -100px; background: radial-gradient(circle,rgba(116,0,250,.12),transparent 70%); }
.hero::after { width: 430px; height: 430px; bottom: -250px; left: -130px; background: radial-gradient(circle,rgba(115,180,212,.2),transparent 70%); }
.identity-shape { position: absolute; width: clamp(280px,35vw,650px); height: auto; pointer-events: none; user-select: none; }
.hero-identity { z-index: -1; top: -105px; right: -155px; opacity: .22; transform: rotate(10deg); }
.hero-logo { width: min(95%, 1180px); height: auto; margin: 0 auto; object-fit: contain; }
.hero-meta { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; max-width: 930px; margin: clamp(35px,5vw,58px) auto 0; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--border); box-shadow: var(--shadow); }
.hero-meta-item { display: flex; min-height: 116px; align-items: flex-start; gap: 14px; padding: 24px; background: rgba(255,255,255,.96); }
.meta-icon, .card-icon { display: inline-flex; width: 42px; height: 42px; flex: 0 0 42px; align-items: center; justify-content: center; border-radius: 13px; color: var(--violet-start); background: linear-gradient(135deg,rgba(62,0,249,.09),rgba(115,180,212,.18)); font-weight: 800; }
.hero-meta strong, .info-card strong { display: block; margin-bottom: 4px; font-size: .77rem; letter-spacing: .09em; text-transform: uppercase; }
.hero-meta span { color: var(--text-soft); font-size: .92rem; }
.hero .button-row { justify-content: center; margin-top: 28px; }

/* Grids and cards */
.info-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.info-card, .person-card, .committee-card, .activity-card, .workshop-card, .authority-card { border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: 0 8px 28px rgba(34,55,91,.05); transition: transform .25s, box-shadow .25s, border-color .25s; }
.info-card:hover, .person-card:hover, .committee-card:hover, .activity-card:hover, .workshop-card:hover, .authority-card:hover { transform: translateY(-5px); border-color: rgba(62,0,249,.2); box-shadow: var(--shadow-hover); }
.info-card { padding: 26px; }
.info-card .card-icon { margin-bottom: 26px; }
.info-card p { margin: 7px 0 0; color: var(--text-soft); font-size: .92rem; }
.intro-grid { display: grid; grid-template-columns: .85fr 1.15fr; align-items: start; gap: clamp(42px,8vw,105px); }
.intro-copy { font-size: 1.07rem; color: var(--text-soft); }
.intro-copy p:first-child { margin-top: 0; }
.quote-panel { position: relative; padding: clamp(32px,5vw,60px); overflow: hidden; border-radius: var(--radius-lg); color: #fff; background: var(--gradient-violet); box-shadow: 0 25px 70px rgba(62,0,249,.2); }
.quote-panel::after { position: absolute; width: 220px; height: 220px; right: -80px; bottom: -105px; border: 1px solid rgba(255,255,255,.27); border-radius: 50%; content: ""; box-shadow: 0 0 0 28px rgba(255,255,255,.05), 0 0 0 60px rgba(255,255,255,.04); }
.quote-panel h2 { position: relative; z-index: 1; margin: 0; font-size: clamp(2.15rem,4vw,4.6rem); line-height: .98; letter-spacing: -.055em; }
.quote-panel p { position: relative; z-index: 1; margin: 22px 0 0; opacity: .86; font-size: 1.1rem; }
.speaker-featured { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; margin-bottom: 44px; }
.international-speakers .speaker-featured { margin-bottom: 0; }
.person-card { position: relative; padding: 32px; overflow: hidden; }
.person-card.featured { min-height: 220px; display: flex; flex-direction: column; justify-content: flex-end; }
.person-card.featured::before { position: absolute; width: 140px; height: 140px; top: -58px; right: -34px; border: 18px solid rgba(62,0,249,.07); border-radius: 50%; content: ""; }
.person-card h3, .person-card h4, .committee-card h3, .workshop-card h3, .authority-card h3 { margin: 0; font-size: 1.25rem; line-height: 1.3; }
.speakers-section { position: relative; background: radial-gradient(circle at 100% 24%,rgba(62,0,249,.09),transparent 28%),#fff; }
.international-speakers { position: relative; margin-bottom: clamp(58px,7vw,88px); padding: clamp(26px,4vw,48px); overflow: hidden; border: 1px solid rgba(116,0,250,.14); border-radius: var(--radius-lg); background: var(--gradient-violet-soft); box-shadow: 0 22px 60px rgba(62,0,249,.09); }
.international-speakers::after { position: absolute; width: 240px; height: 240px; right: -110px; top: -130px; border: 28px solid rgba(116,0,250,.07); border-radius: 50%; content: ""; }
.speaker-block-heading { position: relative; z-index: 1; margin-bottom: 25px; }
.speaker-block-heading h3 { margin: 10px 0 0; font-size: clamp(1.65rem,3vw,2.45rem); line-height: 1.1; letter-spacing: -.035em; }
.speaker-label { display: inline-flex; padding: 7px 12px; border-radius: 999px; color: #fff; background: var(--gradient-violet); font-size: .69rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.speaker-label-blue { background: var(--gradient-blue); }
.national-speakers { padding-top: clamp(12px,2vw,24px); border-top: 2px solid transparent; border-image: var(--gradient-blue) 1; }
.country-tag { align-self: flex-start; margin-bottom: 40px; padding: 6px 10px; border-radius: 999px; color: var(--violet-start); background: rgba(62,0,249,.08); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.national-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.national-grid .person-card { padding: 22px 24px; }
.national-grid h3, .national-grid h4 { font-size: 1rem; }
.societies-section { position: relative; overflow: hidden; }
.society-logo-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.society-logo-card { display: flex; min-height: 165px; align-items: center; justify-content: center; margin: 0; padding: 28px; border: 1px solid rgba(62,111,176,.15); border-radius: var(--radius); background: rgba(255,255,255,.92); box-shadow: 0 14px 38px rgba(34,55,91,.07); transition: transform .25s,box-shadow .25s,border-color .25s; }
.society-logo-card:hover { transform: translateY(-4px); border-color: rgba(62,0,249,.22); box-shadow: var(--shadow-hover); }
.society-logo-card img { width: auto; height: auto; max-width: min(100%,220px); max-height: 100px; object-fit: contain; }
.activities-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; }
.activity-main { display: flex; min-height: 440px; flex-direction: column; justify-content: flex-end; padding: clamp(34px,5vw,62px); border-radius: var(--radius-lg); color: #fff; background: linear-gradient(145deg,#316caa,#77bdd8); }
.activity-main h2 { max-width: 570px; margin: 0; font-size: clamp(2rem,4vw,3.8rem); line-height: 1.05; letter-spacing: -.045em; }
.activity-main p { max-width: 560px; margin: 20px 0 0; opacity: .88; }
.activity-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
.activity-card { display: flex; min-height: 150px; flex-direction: column; justify-content: space-between; padding: 24px; }
.activity-card span { color: var(--violet-start); font-size: 1.25rem; font-weight: 800; }
.activity-card strong { font-size: 1rem; }
.committee-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.committee-card { min-width: 0; padding: 28px; background: linear-gradient(145deg,#fff 35%,rgba(115,180,212,.11)); }
.committee-card h3 { overflow-wrap: anywhere; }
.committee-card .card-icon { margin-bottom: 42px; }
.committee-card p { margin: 8px 0 0; color: var(--text-soft); }
.workshop-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.workshop-card { position: relative; min-height: 265px; padding: 34px; overflow: hidden; }
.workshop-card::after { position: absolute; width: 145px; height: 145px; right: -55px; bottom: -55px; border: 24px solid rgba(115,180,212,.16); border-radius: 50%; content: ""; }
.workshop-number { display: block; margin-bottom: 70px; color: var(--blue-start); font-size: .75rem; font-weight: 800; letter-spacing: .15em; }
.workshop-card p { margin: 9px 0 0; color: var(--text-soft); }
.authority-summary { display: grid; grid-template-columns: 1.25fr .75fr; gap: 26px; padding: clamp(32px,5vw,58px); border: 1px solid var(--border); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.authority-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin: 0; }
.authority-list div:first-child { grid-column: 1 / -1; }
.authority-list dt { color: var(--violet-start); font-size: .72rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.authority-list dd { margin: 5px 0 0; font-weight: 700; }
.authority-summary .button-row { align-self: end; justify-content: flex-end; }

/* Interior pages */
.page-hero { position: relative; overflow: hidden; padding: clamp(70px,10vw,132px) 0 clamp(62px,8vw,105px); background: radial-gradient(circle at 82% 15%,rgba(116,0,250,.13),transparent 32%),linear-gradient(145deg,#eaf5fb 0%,#fff 58%,#f4efff 100%); }
.page-hero::after { position: absolute; width: 300px; height: 300px; top: -170px; right: 4%; border: 1px solid rgba(62,0,249,.12); border-radius: 50%; content: ""; box-shadow: 0 0 0 45px rgba(115,180,212,.06),0 0 0 90px rgba(62,0,249,.035); }
.page-hero h1 { max-width: 900px; margin: 0; font-size: clamp(2.65rem,6vw,5.6rem); line-height: .98; letter-spacing: -.06em; }
.page-hero p { max-width: 690px; margin: 24px 0 0; color: var(--text-soft); font-size: 1.08rem; }
.event-bar { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: -32px; padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.event-bar div { padding: 8px 18px; border-left: 2px solid var(--blue-end); }
.event-bar small { display: block; margin-bottom: 4px; color: var(--text-soft); font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.event-bar strong { font-size: .95rem; }
.placeholder-box { padding: clamp(40px,7vw,80px); border: 1px solid var(--border); border-radius: var(--radius-lg); text-align: center; background: linear-gradient(145deg,#fff,#f6f8fc); box-shadow: var(--shadow); }
.placeholder-mark { display: flex; width: 70px; height: 70px; align-items: center; justify-content: center; margin: 0 auto 24px; border-radius: 22px; color: #fff; background: var(--gradient-violet); font-size: 1.35rem; font-weight: 800; }
.placeholder-box h2 { margin: 0; font-size: clamp(1.6rem,3vw,2.5rem); }
.placeholder-box p { max-width: 620px; margin: 15px auto 0; color: var(--text-soft); }
.directors-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.authority-card { padding: 30px; }
.authority-card.president { grid-column: span 2; color: #fff; background: var(--gradient-violet); }
.authority-role { display: block; margin-bottom: 42px; color: var(--violet-start); font-size: .72rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.president .authority-role { color: rgba(255,255,255,.76); }
.authority-card p { margin: 6px 0 0; color: var(--text-soft); }
.program-tabs { display: flex; gap: 10px; margin-bottom: 24px; padding: 8px; overflow-x: auto; border-radius: 18px; background: var(--background); }
.tab-button { flex: 1 0 190px; padding: 14px 20px; border: 0; border-radius: 13px; color: var(--text-soft); background: transparent; cursor: pointer; font-weight: 800; }
.tab-button[aria-selected="true"] { color: #fff; background: var(--gradient-violet); box-shadow: 0 10px 22px rgba(62,0,249,.18); }
.tab-panel[hidden] { display: none; }
.day-panel { padding: clamp(34px,5vw,56px); border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.day-panel h2 { margin: 0; font-size: clamp(1.6rem,3vw,2.4rem); }
.day-panel p { margin: 13px 0 0; color: var(--text-soft); }
.venue-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; gap: 24px; }
.venue-card { padding: clamp(34px,5vw,60px); border-radius: var(--radius-lg); color: #fff; background: var(--gradient-blue); }
.venue-card h2 { margin: 0 0 24px; font-size: clamp(2rem,4vw,3.5rem); line-height: 1.05; }
.venue-card address { margin-bottom: 30px; font-style: normal; font-size: 1.08rem; }
.venue-details { display: grid; gap: 16px; padding: clamp(34px,5vw,60px); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.venue-detail { padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.venue-detail:last-child { padding-bottom: 0; border-bottom: 0; }
.venue-detail small { display: block; color: var(--text-soft); font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.venue-detail strong { display: block; margin-top: 4px; }
.venue-map { position: relative; width: 100%; margin-top: 32px; overflow: hidden; border: 1px solid rgba(62,111,176,.16); border-radius: 24px; background: var(--blue-soft); box-shadow: 0 20px 60px rgba(20,40,80,.12); }
.venue-map::before { position: absolute; inset: 0 0 auto; z-index: 1; height: 5px; content: ""; background: linear-gradient(90deg,var(--blue-start),var(--blue-end),var(--violet-start),var(--violet-end)); pointer-events: none; }
.venue-map iframe { display: block; width: 100%; height: 480px; border: 0; }

/* Registration */
.registration-section { background: linear-gradient(180deg,#fff,var(--blue-soft)); }
.registration-intro { max-width: 900px; margin: 0 auto 34px; text-align: center; }
.registration-intro .eyebrow { justify-content: center; }
.registration-intro h2 { margin: 0; font-size: clamp(1.7rem,3.5vw,3rem); line-height: 1.12; letter-spacing: -.04em; }
.registration-intro p { margin: 18px auto 24px; color: var(--text-soft); }
.registration-form-wrapper { width: min(100%,900px); margin: 0 auto; overflow: hidden; border: 1px solid rgba(62,111,176,.14); border-radius: 24px; background: #fff; box-shadow: 0 20px 60px rgba(20,40,80,.10); }
.registration-form-iframe { display: block; width: 100%; height: 2930px; border: 0; }
.registration-steps { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 900px; margin: 0 auto 28px; }
.registration-step { display: flex; gap: 18px; align-items: flex-start; padding: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: 0 10px 30px rgba(34,55,91,.06); }
.registration-step-number { display: inline-flex; width: 44px; height: 44px; flex: 0 0 44px; align-items: center; justify-content: center; border-radius: 14px; color: #fff; background: var(--gradient-violet); font-weight: 800; }
.registration-step strong { display: block; margin-bottom: 5px; color: var(--violet-start); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.registration-step p { margin: 0; color: var(--text-soft); }
.registration-payment-cta { max-width: 900px; margin: 30px auto 0; padding: clamp(28px,5vw,48px); border-radius: var(--radius-lg); text-align: center; color: #fff; background: var(--gradient-violet); box-shadow: 0 22px 60px rgba(62,0,249,.2); }
.registration-payment-cta h2 { margin: 0 0 10px; font-size: clamp(1.55rem,3vw,2.4rem); }
.registration-payment-cta p { margin: 0 0 22px; opacity: .88; }
.registration-payment-cta .btn { color: var(--violet-start); background: #fff; box-shadow: none; }
.registration-process { display: grid; grid-template-columns: minmax(0,1fr) 64px minmax(0,1fr); max-width: 1100px; margin: 0 auto; align-items: stretch; }
.registration-process-card { position: relative; display: flex; min-width: 0; flex-direction: column; padding: clamp(30px,4vw,48px); overflow: hidden; border-radius: var(--radius-lg); box-shadow: 0 22px 60px rgba(20,40,80,.12); }
.registration-process-card h2 { margin: 10px 0 14px; font-size: clamp(2rem,4vw,3.25rem); line-height: 1; letter-spacing: -.045em; }
.registration-process-card > p:not(.registration-process-label):not(.registration-process-condition) { max-width: 460px; margin: 0 0 28px; font-size: 1.02rem; }
.registration-process-number { display: block; margin-bottom: 24px; font-size: clamp(3.8rem,7vw,6.5rem); font-weight: 800; line-height: .8; letter-spacing: -.08em; }
.registration-process-label { margin: 0; font-size: .75rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.registration-process-primary { color: #fff; background: var(--gradient-violet); box-shadow: 0 24px 65px rgba(62,0,249,.23); }
.registration-process-primary .registration-process-number { color: rgba(255,255,255,.34); }
.registration-process-primary .registration-process-label { color: rgba(255,255,255,.82); }
.registration-process-primary > p:not(.registration-process-label) { color: rgba(255,255,255,.9); }
.registration-process-primary .registration-process-button { color: var(--violet-start); background: #fff; box-shadow: none; }
.registration-process-payment { border: 1px solid rgba(62,111,176,.2); background: #fff; }
.registration-process-payment .registration-process-number { color: rgba(62,111,176,.2); }
.registration-process-payment .registration-process-label { color: var(--blue-start); }
.registration-process-condition { display: inline-block; margin: 0 0 18px; padding: 7px 12px; border-radius: 999px; color: var(--blue-start); background: var(--blue-soft); font-size: .72rem; font-weight: 800; letter-spacing: .07em; text-transform: uppercase; }
.registration-process-arrow { display: flex; align-items: center; justify-content: center; color: var(--violet-start); font-size: 2.25rem; font-weight: 800; }
.registration-process-button { margin-top: auto; }
.registration-scholarship { display: grid; grid-template-columns: auto 1fr; gap: 22px; max-width: 900px; margin: 34px auto 0; align-items: start; padding: clamp(26px,4vw,38px); border: 1px solid rgba(62,111,176,.18); border-radius: var(--radius-lg); background: linear-gradient(135deg,#fff,var(--blue-soft)); box-shadow: 0 16px 45px rgba(20,40,80,.08); }
.registration-scholarship-mark { display: inline-flex; width: 56px; height: 56px; align-items: center; justify-content: center; border-radius: 18px; color: #fff; background: var(--gradient-blue); font-size: 1.4rem; font-weight: 800; }
.registration-scholarship h2 { margin: 0 0 12px; font-size: clamp(1.45rem,3vw,2.1rem); }
.registration-scholarship p { margin: 7px 0 0; color: var(--text-soft); }

/* Payments */
.payment-notice { display: grid; grid-template-columns: auto 1fr auto; gap: 24px; align-items: center; padding: clamp(28px,4vw,46px); border: 1px solid rgba(62,0,249,.16); border-radius: var(--radius-lg); background: var(--gradient-violet-soft); box-shadow: var(--shadow); }
.payment-notice-mark { display: inline-flex; width: 60px; height: 60px; align-items: center; justify-content: center; border-radius: 20px; color: #fff; background: var(--gradient-violet); font-size: 1.35rem; font-weight: 800; }
.payment-notice h2 { margin: 0 0 8px; font-size: clamp(1.45rem,3vw,2.25rem); }
.payment-notice p { margin: 0; color: var(--text-soft); }
.payment-section-heading { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-bottom: 36px; }
.payment-section-heading h2 { margin: 0; font-size: clamp(2rem,4vw,3.4rem); line-height: 1.08; letter-spacing: -.045em; }
.payment-section-heading p { max-width: 620px; margin: 12px 0 0; color: var(--text-soft); }
.payment-provider-logo { width: 190px; max-height: 110px; padding: 13px; object-fit: contain; border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
.payment-cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.payment-card { display: flex; min-width: 0; min-height: 330px; flex-direction: column; padding: clamp(26px,3vw,36px); border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.payment-card-label { color: var(--text-soft); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.payment-card h3 { margin: 18px 0 0; font-size: clamp(1.15rem,2vw,1.45rem); line-height: 1.25; }
.payment-price { margin: 22px 0 28px; color: var(--violet-start); font-size: clamp(2rem,4vw,3.25rem); font-weight: 800; line-height: 1; letter-spacing: -.05em; }
.payment-card .btn, .paypal-hosted-button { margin-top: auto; }
.payments-national { background: linear-gradient(180deg,#fff,var(--blue-soft)); }
.payments-international { background: linear-gradient(160deg,var(--violet-soft),#fff); }
.paypal-heading-mark { display: inline-flex; padding: 12px 18px; border-radius: 16px; color: #173b7a; background: #fff; box-shadow: var(--shadow); font-size: 1.3rem; font-weight: 800; font-style: italic; }
.paypal-hosted-button { min-height: 48px; }
.payment-final-cta { text-align: center; }
.payment-final-cta h2 { margin-top: 0; }

/* Free papers guide */
.works-hero .page-hero-kicker { max-width: 820px; color: var(--violet-start); font-size: clamp(1rem,2vw,1.25rem); font-weight: 800; letter-spacing: .02em; text-transform: uppercase; }
.works-hero h1 { max-width: 1040px; font-size: clamp(2.35rem,5vw,5rem); }
.works-critical { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: -34px; position: relative; z-index: 2; }
.works-critical-card { padding: 28px; border-radius: var(--radius); color: #fff; background: var(--gradient-violet); box-shadow: 0 18px 45px rgba(62,0,249,.18); }
.works-critical-card:nth-child(2) { background: var(--gradient-blue); }
.works-critical-card small { display: block; margin-bottom: 7px; opacity: .8; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.works-critical-card strong, .works-critical-card a { display: block; max-width: 100%; font-size: clamp(1.15rem,2.4vw,1.7rem); font-weight: 800; overflow-wrap: anywhere; word-break: break-word; }
.works-content a { overflow-wrap: anywhere; word-break: break-word; }
.works-toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; max-width: 900px; margin: 0 auto 34px; }
.works-toolbar p { max-width: 530px; margin: 0; color: var(--text-soft); }
.works-highlights { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; max-width: 900px; margin: 0 auto 42px; }
.works-highlight { padding: 20px; border: 1px solid rgba(62,111,176,.16); border-radius: 18px; background: var(--gradient-blue-soft); font-size: .92rem; font-weight: 700; }
.works-content { max-width: 900px; margin: 0 auto; }
.guide-section { margin-bottom: 24px; padding: clamp(28px,5vw,52px); border: 1px solid var(--border); border-radius: var(--radius); background: #fff; box-shadow: 0 12px 38px rgba(34,55,91,.06); }
.guide-section:nth-child(even) { background: linear-gradient(145deg,#fff,var(--blue-soft)); }
.guide-section h2 { margin: 0 0 22px; font-size: clamp(1.55rem,3vw,2.35rem); line-height: 1.15; letter-spacing: -.035em; }
.guide-section h3 { margin: 30px 0 12px; font-size: 1.2rem; }
.guide-section p { margin: 0 0 16px; }
.guide-section ul, .guide-section ol { margin: 0 0 18px; padding-left: 1.4rem; }
.guide-section li { margin-bottom: 10px; }
.guide-section a { color: var(--violet-start); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.guide-alert { margin: 24px 0; padding: 22px; border-left: 5px solid var(--violet-start); border-radius: 0 16px 16px 0; background: var(--violet-soft); font-weight: 700; }
.guide-sublist { list-style: lower-alpha; }

/* Sponsors */
.sponsors-section { position: relative; overflow: hidden; background: radial-gradient(circle at 12% 12%,rgba(115,180,212,.18),transparent 28%),radial-gradient(circle at 88% 82%,rgba(116,0,250,.1),transparent 30%),#fff; }
.sponsors-heading { max-width: none; margin-bottom: 42px; text-align: center; }
.sponsors-heading .section-title { position: relative; display: inline-block; }
.sponsors-heading .section-title::after { display: block; width: 76px; height: 3px; margin: 16px auto 0; border-radius: 999px; content: ""; background: var(--gradient-violet); }
.sponsor-tier { display: grid; margin-inline: auto; align-items: stretch; justify-content: center; }
.sponsor-tier-primary { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 28px; max-width: 980px; }
.sponsor-tier-secondary { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; max-width: 920px; margin-top: 32px; }
.sponsor-card { display: flex; min-width: 0; align-items: center; justify-content: center; margin: 0; border: 1px solid rgba(62,111,176,.15); background: rgba(255,255,255,.94); box-shadow: 0 16px 42px rgba(34,55,91,.08); }
.sponsor-card-primary { min-height: 235px; padding: 36px; border-radius: var(--radius-lg); }
.sponsor-card-secondary { min-height: 158px; padding: 28px; border-radius: var(--radius); }
.sponsor-card img { display: block; width: auto; height: auto; object-fit: contain; }
.sponsor-cassara img { max-width: min(100%,320px); max-height: 160px; }
.sponsor-pintpharma img { max-width: min(100%,420px); max-height: 115px; }
.sponsor-qpharma img { max-width: min(100%,250px); max-height: 82px; }
.sponsor-panalab img { max-width: min(100%,280px); max-height: 76px; }
.sponsor-ag img { max-width: min(100%,230px); max-height: 96px; }

/* CTA and footer */
.cta { padding: clamp(75px,9vw,120px) 0; }
.cta-panel { position: relative; isolation: isolate; overflow: hidden; padding: clamp(42px,7vw,82px); border-radius: var(--radius-lg); color: #fff; background: var(--gradient-violet); box-shadow: 0 25px 70px rgba(62,0,249,.22); }
.cta-panel::after { position: absolute; z-index: -1; width: 330px; height: 330px; right: -90px; top: -140px; border: 1px solid rgba(255,255,255,.23); border-radius: 50%; content: ""; box-shadow: 0 0 0 45px rgba(255,255,255,.05),0 0 0 90px rgba(255,255,255,.04); }
.cta-identity { z-index: -1; right: -100px; bottom: -210px; opacity: .24; filter: brightness(1.4); transform: rotate(-12deg); }
.cta-panel h2 { max-width: 800px; margin: 0; font-size: clamp(2rem,4.5vw,4.2rem); line-height: 1.04; letter-spacing: -.05em; }
.cta-panel p { margin: 19px 0 28px; opacity: .84; }
.cta-panel .btn-primary { color: var(--violet-start); background: #fff; box-shadow: none; }
.cta-panel .btn-outline { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.site-footer { padding: 70px 0 25px; color: #cbd4e4; background: radial-gradient(circle at 82% 0,rgba(116,0,250,.28),transparent 32%),radial-gradient(circle at 10% 100%,rgba(115,180,212,.19),transparent 34%),#11192a; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 60px; }
.footer-branding { display: flex; align-items: center; gap: 18px; }
.footer-aaiba { width: 64px; }
.footer-congress { width: min(100%, 350px); padding: 10px; border-radius: 10px; background: #fff; }
.footer-copy { max-width: 520px; margin: 24px 0 0; color: #98a5ba; }
.footer-title { margin: 0 0 18px; color: #fff; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; }
.footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.footer-links a:hover { color: #fff; }
.footer-meta p { margin: 0 0 13px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 52px; padding-top: 23px; border-top: 1px solid rgba(255,255,255,.1); color: #7f8ca3; font-size: .82rem; }
.back-to-top { position: fixed; z-index: 80; right: 22px; bottom: 22px; display: flex; width: 48px; height: 48px; align-items: center; justify-content: center; border: 0; border-radius: 50%; color: #fff; background: var(--gradient-violet); box-shadow: 0 12px 30px rgba(62,0,249,.25); cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s, transform .2s; }
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 1050px) {
  :root { --header-height: 108px; }
  .brand img { width: 95px; height: auto; }
  .menu-toggle { display: flex; }
  .site-nav { position: fixed; inset: var(--header-height) 0 auto; max-height: 0; overflow: hidden; visibility: hidden; background: #fff; box-shadow: 0 22px 45px rgba(23,32,51,.12); transition: max-height .3s, visibility .3s; }
  .site-nav.open { max-height: calc(100vh - var(--header-height)); visibility: visible; overflow-y: auto; }
  .nav-list { display: grid; gap: 0; width: min(calc(100% - 40px),var(--container)); margin: 0 auto; padding: 18px 0 28px; }
  .nav-link { display: block; padding: 14px 6px; font-size: .9rem; }
  .nav-link:not(.nav-cta)::after { display: none; }
  .nav-cta { margin-top: 8px; padding-inline: 20px; text-align: center; }
  .info-grid, .committee-grid { grid-template-columns: repeat(2,1fr); }
  .activities-layout { grid-template-columns: 1fr; }
  .activity-main { min-height: 360px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; }
  .payment-cards { grid-template-columns: 1fr 1fr; }
  .works-highlights { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  :root { --header-height: 108px; }
  .container { width: min(calc(100% - 28px), var(--container)); }
  .brand img { width: 95px; height: auto; }
  .hero { padding-top: 38px; }
  .hero-logo { width: 100%; }
  .hero-meta { grid-template-columns: 1fr; }
  .hero-meta-item { min-height: auto; }
  .intro-grid, .authority-summary, .venue-grid { grid-template-columns: 1fr; }
  .quote-panel { min-height: 350px; display: flex; flex-direction: column; justify-content: flex-end; }
  .speaker-featured, .workshop-grid { grid-template-columns: 1fr; }
  .national-grid { grid-template-columns: repeat(2,1fr); }
  .committee-grid { grid-template-columns: 1fr; }
  .authority-summary .button-row { justify-content: flex-start; }
  .event-bar { grid-template-columns: 1fr; }
  .directors-grid { grid-template-columns: 1fr; }
  .authority-card.president { grid-column: auto; }
  .footer-grid { grid-template-columns: 1fr; gap: 38px; }
  .footer-grid > div:first-child { grid-column: auto; }
  .footer-branding { align-items: flex-start; flex-direction: column; }
  .footer-bottom { flex-direction: column; }
  .venue-map iframe { height: 380px; }
  .registration-steps, .payment-cards, .works-critical { grid-template-columns: 1fr; }
  .registration-process { grid-template-columns: 1fr; gap: 16px; }
  .registration-process-arrow { min-height: 34px; transform: rotate(90deg); }
  .payment-notice { grid-template-columns: auto 1fr; }
  .payment-notice .btn { grid-column: 1 / -1; }
  .payment-section-heading { align-items: flex-start; flex-direction: column; }
  .works-highlights { grid-template-columns: 1fr; }
  .sponsors-heading { margin-bottom: 32px; }
  .sponsor-tier-primary { grid-template-columns: 1fr; max-width: 520px; }
  .sponsor-tier-secondary { grid-template-columns: repeat(2,minmax(0,1fr)); max-width: 620px; }
  .sponsor-ag { grid-column: 1 / -1; width: calc(50% - 11px); justify-self: center; }
  .sponsor-card-primary { min-height: 205px; }
  .sponsor-card-secondary { min-height: 145px; padding: 22px; }
}

@media (max-width: 480px) {
  :root { --header-height: 90px; }
  .brand img { width: 74px; }
  .section { padding-block: 66px; }
  .button-row .btn { width: 100%; }
  .info-grid, .national-grid, .activity-grid { grid-template-columns: 1fr; }
  .society-logo-grid { grid-template-columns: 1fr; }
  .society-logo-card { min-height: 140px; }
  .person-card.featured { min-height: 195px; }
  .activity-main { min-height: 390px; }
  .authority-list { grid-template-columns: 1fr; }
  .authority-list div:first-child { grid-column: auto; }
  .footer-congress { width: 100%; }
  .registration-step { padding: 20px; }
  .registration-process-card { padding: 30px 24px; }
  .registration-process-button { width: 100%; }
  .registration-scholarship { grid-template-columns: 1fr; }
  .payment-notice { grid-template-columns: 1fr; }
  .payment-notice-mark { width: 50px; height: 50px; }
  .payment-card { min-height: 0; }
  .works-toolbar .btn { width: 100%; }
  .works-critical-card { padding: 22px; }
}

@media (max-width: 480px) {
  .sponsor-tier-secondary { grid-template-columns: 1fr; }
  .sponsor-ag { grid-column: auto; width: auto; justify-self: stretch; }
  .sponsor-card-primary { min-height: 185px; padding: 22px; }
  .sponsor-card-secondary { min-height: 138px; }
}

@media (min-width: 481px) and (max-width: 760px) {
  .society-logo-grid { grid-template-columns: repeat(2,1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}