:root {
  --ink: #111522;
  --subtle-ink: #4e5c72;
  --muted: #6d7b8e;
  --blue: #213bfa;
  --blue-deep: #1734dc;
  --blue-light: #eff4ff;
  --line: #e3eaf5;
  --white: #fff;
  --container: 1160px;
  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: #fff; line-height: 1.55; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; }
a:focus-visible { outline: 3px solid #6499ff; outline-offset: 4px; border-radius: 4px; }
button:focus-visible { outline: 3px solid #6499ff; outline-offset: 4px; }
.container { width: min(var(--container), calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -100px; left: 16px; padding: 10px 16px; background: white; color: var(--ink); box-shadow: 0 4px 18px #202e5b30; }
.skip-link:focus { top: 12px; }
.site-header { z-index: 10; position: relative; border-bottom: 1px solid #edf1f7; background: #ffffffee; }
.header-inner { min-height: 90px; display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.site-brand { display: inline-flex; align-items: center; gap: 15px; text-decoration: none; }
.brand-mark { width: 12px; height: 40px; background: var(--blue); transform: skew(-8deg); flex: 0 0 auto; }
.brand-copy { display: grid; line-height: 1.26; }
.brand-copy strong { font-size: 16px; letter-spacing: -0.03em; }
.brand-copy small { font-size: 11.5px; color: var(--muted); font-weight: 600; margin-top: 3px; }
.site-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 650; }
.site-nav a { text-decoration: none; padding: 9px 0; color: #455268; transition: color .2s ease; }
.site-nav a:hover { color: var(--blue); }
.site-nav a[aria-current="page"] { color: var(--blue); border-bottom: 2px solid var(--blue); }

.hero { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); min-height: 610px; padding-top: 83px; padding-bottom: 75px; gap: 0; align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: .11em; display: flex; gap: 13px; align-items: center; margin: 0 0 26px; text-transform: uppercase; }
.blue-bar { display: inline-block; flex: 0 0 auto; height: 20px; width: 6px; transform: skew(-9deg); background: var(--blue); }
h1,h2,h3,p { overflow-wrap: break-word; }
.hero h1 { font-size: clamp(42px, 4.4vw, 65px); letter-spacing: -.063em; line-height: 1.12; margin: 0; max-width: 710px; font-weight: 800; }
.hero h1 span { color: var(--blue); }
.hero-lead { font-size: 18px; color: var(--subtle-ink); margin: 30px 0 0; max-width: 530px; line-height: 1.7; }
.hero-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 33px; }
.button { min-height: 49px; padding: 13px 21px; border-radius: 6px; font-size: 14px; font-weight: 750; text-decoration: none; display: inline-flex; align-items: center; gap: 22px; justify-content: center; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: #fff; box-shadow: 0 10px 30px rgba(36, 65, 252, .14); }
.button-primary:hover { background: var(--blue-deep); }
.button-quiet { background: #fff; color: var(--ink); border: 1px solid #dbe3ef; }
.button-quiet:hover { border-color: #8da3ee; }
.access-note { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 10px; margin: 24px 0 0; }
.access-dot { display: inline-block; width: 8px; height: 8px; border-radius: 100%; background: #30a5d6; }
.hero-art { align-self: stretch; display: flex; align-items: center; justify-content: center; position: relative; min-width: 0; }
.hero-art::after { content: ''; position: absolute; width: 140px; height: 90px; top: 22px; right: 4px; background-image: radial-gradient(#5777ff 1.15px, transparent 1.15px); background-size: 13px 13px; opacity: .35; mask-image: linear-gradient(to bottom, black, transparent); pointer-events: none; }
.hero-art-glow { position: absolute; width: 94%; height: 74%; border-radius: 50%; top: 8%; right: 0%; background: radial-gradient(circle at 60% 40%, #eaf3ff 0%, #f8fbff 48%, transparent 72%); filter: blur(28px); pointer-events: none; }
.hero-art img { position: relative; max-width: 580px; width: 116%; min-width: 400px; height: auto; object-fit: contain; margin-right: -40px; mix-blend-mode: multiply; }

.feature-section { background: #f8faff; padding: 85px 0 91px; position: relative; overflow: hidden; }
.feature-section::before { content: ''; position: absolute; top: -170px; right: -150px; width: 450px; height: 450px; border-radius: 50%; background: radial-gradient(circle, #e8efff 0, transparent 70%); }
.feature-grid { display: grid; grid-template-columns: minmax(220px, .54fr) minmax(0, 1fr); gap: 70px; position: relative; align-items: center; }
.section-index { font-size: 12px; letter-spacing: .1em; color: var(--blue); font-weight: 800; margin: 0 0 15px; }
.feature-intro h2, .about-section h2 { font-size: clamp(38px, 3.6vw, 50px); letter-spacing: -.055em; line-height: 1.1; margin: 0 0 23px; font-weight: 800; }
.feature-intro h2 span { color: var(--blue); }
.feature-intro p:not(.section-index) { color: var(--subtle-ink); line-height: 1.75; max-width: 300px; }
.text-link { color: var(--blue); text-decoration: none; font-size: 14px; font-weight: 800; display: inline-flex; gap: 12px; padding: 9px 0; margin-top: 10px; }
.text-link:hover { text-decoration: underline; }
.featured-card { position: relative; background: #fff; border: 1px solid #e0e9f9; border-radius: 12px; padding: 33px 37px 32px; box-shadow: 0 16px 52px rgba(23, 53, 116, .055); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: 15px; flex-wrap: wrap; }
.card-kicker { display: flex; gap: 9px; align-items: center; font-weight: 800; letter-spacing: .08em; font-size: 11px; color: var(--blue); }
.card-kicker::before { content: ''; width: 8px; height: 8px; background: var(--blue); border-radius: 100%; }
.date-display { color: #58657b; font-size: 13px; font-weight: 670; }
.featured-card h3 { font-size: clamp(23px, 2.4vw, 30px); line-height: 1.25; letter-spacing: -.035em; margin: 24px 0 20px; }
.speaker-name { font-size: 16px; font-weight: 800; margin: 0 0 4px; }
.speaker-role { color: #667389; font-size: 13px; margin: 0; }
.detail-line { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 28px; padding-top: 19px; border-top: 1px solid var(--line); color: #495a73; font-size: 13px; font-weight: 650; }
.detail-line span { display: inline-flex; align-items: center; gap: 7px; }
.icon-inline { font-size: 17px; line-height: 1; color: var(--blue); }
.join-zone { margin-top: 24px; }
.join-button { display: inline-flex; background: var(--blue); color: white; text-decoration: none; font-size: 14px; font-weight: 800; min-height: 49px; border-radius: 6px; align-items: center; gap: 12px; padding: 13px 20px; }
.join-button:hover { background: var(--blue-deep); }
.join-button span { font-size: 18px; }
.join-unavailable { border-left: 3px solid #93a8ff; background: #f4f7ff; border-radius: 2px 6px 6px 2px; color: #495b79; padding: 14px 16px; font-size: 13px; line-height: 1.6; }
.no-upcoming h3 { margin-top: 0; }
.no-upcoming p { color: var(--subtle-ink); margin-bottom: 22px; }

.about-section { padding-top: 105px; padding-bottom: 110px; display: grid; gap: 105px; grid-template-columns: 1fr 1.22fr; }
.about-section h2 { max-width: 340px; }
.about-section h2 span { color: var(--blue); }
.about-copy p { margin: 0 0 18px; max-width: 610px; color: var(--subtle-ink); font-size: 16px; line-height: 1.8; }
.about-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.about-chips span { padding: 9px 13px; background: #f0f5ff; border: 1px solid #e2eaff; color: #36579a; font-weight: 700; font-size: 12px; border-radius: 5px; }
.public-link-section { margin-bottom: 105px; }
.link-panel { display: flex; gap: 30px; align-items: center; justify-content: space-between; padding: 32px 35px; border: 1px solid #dce7ff; border-radius: 10px; background: linear-gradient(125deg, #f4f8ff 0%, #fff 80%); }
.link-panel h2 { letter-spacing: -.04em; font-size: 23px; line-height: 1.25; margin: 0 0 10px; }
.link-panel p:not(.section-index) { font-size: 14px; color: #546278; margin: 0; max-width: 610px; }
.public-address { text-decoration: none; white-space: nowrap; display: inline-flex; padding: 13px 16px; gap: 10px; background: white; border: 1px solid #dce5f7; border-radius: 6px; color: #284bdc; font-weight: 800; font-size: 14px; }
.public-address:hover { border-color: #a0b5ff; }

.site-footer { background: #fff; border-top: 1px solid #e8edf5; }
.footer-inner { padding-block: 39px 48px; }
.footer-heading { color: var(--ink); font-size: 11px; letter-spacing: .13em; font-weight: 850; display: flex; gap: 12px; align-items: center; }
.footer-rule { width: 24px; height: 3px; background: var(--blue); }
.organizers { display: flex; gap: 30px; align-items: center; flex-wrap: wrap; margin-top: 27px; }
.organizers a { display: flex; align-items: center; max-width: min(42%, 360px); min-height: 54px; }
.organizers img { display: block; object-fit: contain; object-position: center left; max-width: 100%; max-height: 60px; height: auto; }
.organizers a:first-child img { width: 228px; }
.organizers a:last-child img { width: 310px; }
.organizer-divider { display: inline-block; width: 1px; height: 52px; background: #cfd8e8; }
.footer-note { color: #8591a2; font-size: 12px; margin: 23px 0 0; }
.footer-credit { color: #8591a2; font-size: 12px; margin: 23px 0 0;   display: ruby; justify-content: center;  align-items: center;}

.program-hero { position: relative; min-height: 355px; display: flex; align-items: center; justify-content: space-between; padding-top: 80px; padding-bottom: 68px; border-bottom: 1px solid var(--line); overflow: hidden; }
.program-hero > div:first-child { z-index: 1; }
.program-hero h1 { font-size: clamp(49px, 5vw, 68px); letter-spacing: -.06em; line-height: 1.09; font-weight: 830; margin: 0 0 22px; }
.program-hero h1 span { color: var(--blue); }
.program-hero p:not(.eyebrow) { color: var(--subtle-ink); max-width: 585px; margin: 0 0 17px; font-size: 16px; }
.program-hero-decoration { position: relative; width: 300px; height: 235px; flex: 0 0 300px; }
.program-orb { position: absolute; width: 195px; height: 195px; border-radius: 50%; top: 10px; right: 25px; background: radial-gradient(circle at 40% 35%, #c9d9ff, #e6efff 56%, transparent 75%); }
.orbit { position: absolute; width: 235px; height: 120px; border: 1px solid #95b2ff; opacity: .5; border-radius: 100%; top: 44px; right: 0; transform: rotate(-30deg); }
.orbit-two { transform: rotate(33deg); }
.orbit-dot { position: absolute; border: 8px solid #2452f0; border-radius: 100%; top: 28px; right: 170px; }
.program-content { padding-top: 65px; }
.program-section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.program-section-head h2 { font-size: 30px; font-weight: 790; letter-spacing: -.045em; margin: 0; }
.schedule-count { border: 1px solid #d9e3f8; border-radius: 5px; padding: 7px 11px; font-size: 12px; color: #607092; font-weight: 750; }
.talk-list { display: grid; gap: 16px; }
.talk-card { display: grid; grid-template-columns: 150px minmax(0, 1fr); border: 1px solid #e0e7f1; border-radius: 10px; overflow: hidden; background: #fff; }
.talk-card-date { background: #f4f7ff; padding: 24px; border-right: 1px solid #e1eaff; display: flex; flex-direction: column; justify-content: flex-start; }
.talk-card-date strong { font-size: 34px; line-height: 1.1; letter-spacing: -.06em; color: #233bea; }
.talk-card-date span { color: #607092; font-size: 13px; font-weight: 750; margin-top: 4px; }
.talk-card-main { padding: 26px 30px 28px; }
.talk-card-main h3 { font-size: 22px; line-height: 1.31; letter-spacing: -.035em; margin: 10px 0 18px; }
.talk-card-main .card-top { gap: 10px; }
.talk-card-main .speaker-role { max-width: 620px; }
.talk-card-main .detail-line { margin-top: 18px; }
.talk-card-main .join-zone { margin-top: 17px; }
.talk-card-main .join-unavailable { display: inline-block; }
.talk-card-description { margin-top: 14px; color: var(--subtle-ink); font-size: 14px; }
.archived-section { margin-top: 30px; padding-bottom: 30px; }
.archived-section .talk-card { opacity: .86; }
.empty-schedule { border: 1px dashed #c9d7ee; border-radius: 8px; padding: 35px; background: #f9fbff; }
.empty-schedule h3 { margin: 0 0 10px; font-size: 20px; }
.empty-schedule p { color: var(--subtle-ink); font-size: 14px; margin: 0; }
.participation-section { padding-block: 65px 105px; }
.participation-box { border-radius: 10px; background: #f5f8ff; border: 1px solid #e0e9fa; display: flex; gap: 25px; padding: 32px 34px; align-items: flex-start; }
.participation-icon { font-size: 22px; color: white; width: 51px; height: 51px; flex: 0 0 51px; display: flex; justify-content: center; align-items: center; background: var(--blue); clip-path: polygon(13% 0,100% 0,87% 100%,0 100%); }
.participation-box h2 { margin: 0 0 7px; font-size: 21px; }
.participation-box p { margin: 0; max-width: 780px; font-size: 14px; color: var(--subtle-ink); }
.content-loading { color: var(--muted); font-size: 14px; }
@media (max-width: 1050px) {
  .hero { grid-template-columns: 1.04fr .96fr; }
  .hero h1 { font-size: clamp(38px, 4.9vw, 58px); }
  .hero-art img { width: 120%; min-width: 350px; }
  .feature-grid { gap: 36px; }
}
@media (max-width: 800px) {
  .container { width: min(100% - 40px, var(--container)); }
  .header-inner { min-height: 76px; }
  .site-nav { gap: 18px; }
  .hero { grid-template-columns: 1fr; padding-top: 54px; padding-bottom: 20px; min-height: unset; }
  .hero-copy { order: 1; }
  .hero-art { order: 2; height: auto; max-height: none; justify-content: center; overflow: visible; }
  .hero-art img { flex: 0 1 auto; min-width: 0; width: min(480px, 100%); max-width: 100%; height: auto; margin: 0; align-self: center; }
  .hero h1 { font-size: clamp(40px, 7.4vw, 62px); }
  .feature-grid { grid-template-columns: 1fr; gap: 25px; }
  .feature-intro h2 br { display: none; }
  .feature-intro p:not(.section-index) { max-width: 620px; }
  .feature-section { padding: 65px 0; }
  .about-section { grid-template-columns: 1fr; gap: 18px; padding-block: 73px; }
  .about-section h2 br { display: none; }
  .link-panel { align-items: flex-start; flex-direction: column; }
  .program-hero-decoration { display: none; }
  .program-hero { min-height: 320px; padding-block: 65px 55px; }
}
@media (max-width: 560px) {
  .container { width: calc(100% - 34px); }
  .header-inner { min-height: 78px; gap: 8px; }
  .brand-mark { height: 33px; width: 9px; }
  .brand-copy strong { font-size: 13px; }
  .brand-copy small { font-size: 10px; max-width: 190px; }
  .site-nav { gap: 9px; font-size: 12px; }
  .site-nav a { white-space: nowrap; }
  .site-nav a:first-child { display: none; }
  .hero { padding-top: 43px; }
  .eyebrow { font-size: 10px; letter-spacing: .08em; margin-bottom: 18px; }
  .hero h1 { font-size: clamp(37px, 9vw, 50px); }
  .hero-lead { font-size: 15.5px; margin-top: 22px; }
  .hero-actions { margin-top: 24px; }
  .button { width: 100%; }
  .hero-art img { width: min(340px, 100%); }
  .featured-card { padding: 23px 21px; }
  .featured-card h3 { font-size: 23px; }
  .date-display { font-size: 12px; }
  .about-section { padding-block: 55px; }
  .public-link-section { margin-bottom: 60px; }
  .link-panel { padding: 25px 22px; }
  .public-address { white-space: normal; }
  .organizers { gap: 16px; }
  .organizer-divider { display: none; }
  .organizers a { max-width: min(100%, 290px); min-height: 0; }
  .organizers a:first-child img { width: 205px; }
  .organizers a:last-child img { width: 270px; }
  .program-hero h1 { font-size: 48px; }
  .talk-card { grid-template-columns: 1fr; }
  .talk-card-date { flex-direction: row; align-items: baseline; gap: 10px; padding: 13px 20px; border-right: 0; border-bottom: 1px solid #e1eaff; }
  .talk-card-date strong { font-size: 27px; }
  .talk-card-main { padding: 23px 20px; }
  .talk-card-main h3 { font-size: 20px; }
  .participation-box { padding: 23px 19px; gap: 14px; }
  .participation-icon { height: 40px; width: 40px; flex-basis: 40px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .button, .site-nav a { transition: none; } }

/* Ομιλητές που έρχονται / teaser cards — χωρίς ημερομηνία ή τίτλο όταν δεν υπάρχουν. */
.teaser-home { padding-block: 72px 75px; }
.teaser-heading { display: flex; align-items: end; justify-content: space-between; gap: 22px; }
.teaser-heading > div { max-width: 690px; }
.teaser-heading h2 { font-size: clamp(30px, 3.6vw, 43px); line-height: 1.15; letter-spacing: -.05em; margin: 0 0 13px; }
.teaser-heading h2 span { color: var(--blue); }
.teaser-heading p:not(.section-index), .teaser-section-intro { font-size: 14px; color: var(--subtle-ink); line-height: 1.75; margin: 0; max-width: 680px; }
.teaser-heading .text-link { flex: 0 0 auto; }
.teaser-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 25px; }
.teaser-card { background: #fafcff; border: 1px solid #dfe8f8; border-radius: 10px; padding: 24px 25px 23px; position: relative; min-width: 0; }
.teaser-card::before { content: ''; display: block; width: 33px; height: 4px; background: var(--blue); transform: skew(-14deg); margin-bottom: 20px; }
.teaser-card-label { color: var(--blue); font-size: 10px; letter-spacing: .11em; font-weight: 800; margin: 0 0 12px; }
.teaser-card-name { font-size: 21px; letter-spacing: -.025em; line-height: 1.28; margin: 0 0 7px; }
.teaser-card-affiliation { color: #53667d; font-size: 13px; line-height: 1.55; margin: 0; }
.teaser-topic { color: var(--ink); font-size: 14px; margin: 16px 0 0; font-weight: 690; line-height: 1.45; }
.teaser-partial-date { color: var(--subtle-ink); font-size: 12px; margin: 9px 0 0; }
.teaser-note { font-size: 12px; line-height: 1.55; color: #657795; margin: 22px 0 0; padding-top: 12px; border-top: 1px solid #e0e8fa; }
.teaser-program-section { padding-bottom: 15px; }
.teaser-program-section .program-section-head { align-items: start; }
@media (max-width: 1000px) { .teaser-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 700px) {
  .teaser-heading { flex-direction: column; align-items: start; gap: 7px; }
  .teaser-home { padding-block: 55px; }
  .teaser-grid { grid-template-columns: 1fr; gap: 12px; }
  .teaser-card { padding: 22px; }
}
@media (max-width: 560px) { .teaser-program-section .program-section-head { align-items: start; flex-wrap: wrap; } }