/* ============================================================
   IMPACT Conference Website – style.css
   Brand: Dark Navy + Light Blue + Gold
   ============================================================ */

/* ── Custom Properties ── */
:root {
  --navy:        #1b2d4f;
  --navy-dark:   #111e36;
  --blue:        #2b5cad;
  --blue-light:  #4e9fd4;
  --blue-pale:   #e8f3fb;
  --gold:        #c8a000;
  --gold-light:  #f0c300;
  --white:       #ffffff;
  --gray-50:     #f7f9fc;
  --gray-100:    #eef1f6;
  --gray-200:    #dde3ec;
  --gray-600:    #5a6a84;
  --gray-700:    #3d4f68;
  --gray-900:    #1a2840;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;

  --shadow-sm:   0 2px 8px rgba(27,45,79,.08);
  --shadow-md:   0 8px 24px rgba(27,45,79,.12);
  --shadow-lg:   0 20px 50px rgba(27,45,79,.18);

  --transition:  .25s ease;
  --font:        'Inter', sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Utility ── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}
.accent { color: var(--blue-light); }
.gold-bar {
  width: 60px; height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 2px;
  margin: 16px auto 0;
}
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.2;
}
.section-desc {
  margin-top: 16px;
  font-size: 1rem;
  color: var(--gray-600);
}
.hide-mobile { display: inline; }

/* ============================================================
   HEADER / NAV
   ============================================================ */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
#header.scrolled {
  border-bottom-color: var(--gray-200);
  box-shadow: var(--shadow-sm);
}
.nav-container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-wave {
  width: 68px;
  height: 20px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--navy);
}
.logo-a { color: var(--blue-light); }
.nav-logo-img {
  height: 38px;
  width: auto;
  display: block;
}
.footer-logo-img {
  height: 44px;
  width: auto;
  display: block;
  margin-bottom: 8px;
}

/* Nav Links */
.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-link {
  font-size: .875rem;
  font-weight: 500;
  color: var(--gray-700);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover,
.nav-link.active {
  color: var(--navy);
  background: var(--blue-pale);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, #1e3f72 100%);
  overflow: hidden;
  padding: 100px 24px 80px;
}

/* Subtle grid pattern */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(78,159,212,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78,159,212,.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  width: 100%;
}

/* Hero Logo Block */
.hero-logo-block {
  margin-bottom: 32px;
}
.hero-wave-svg {
  width: 280px;
  max-width: 100%;
  height: 70px;
  margin: 0 auto 20px;
}
.hero-title {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  letter-spacing: -.04em;
  color: var(--white);
  line-height: 1;
  margin-bottom: 16px;
}
.hero-a { color: var(--gold-light); }

.hero-subtitle-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .875rem;
  font-weight: 400;
  color: rgba(255,255,255,.65);
  letter-spacing: .03em;
}
.hero-dot { color: var(--gold); font-size: 1.2em; }

/* Hero description */
.hero-description {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255,255,255,.82);
  line-height: 1.6;
  margin-bottom: 40px;
}

/* Badges */
.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 48px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 100px;
  padding: 8px 24px;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.hero-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 20px;
}
.hero-badge strong {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.hero-badge span {
  font-size: .7rem;
  color: rgba(255,255,255,.55);
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-top: 2px;
}
.hero-badge-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,.2);
}

/* CTA Buttons */
.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: var(--white);
  font-weight: 600;
  font-size: .95rem;
  padding: 14px 32px;
  border-radius: 100px;
  box-shadow: 0 4px 20px rgba(43,92,173,.4);
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(43,92,173,.5);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  color: rgba(255,255,255,.8);
  font-weight: 500;
  font-size: .95rem;
  padding: 14px 28px;
  border-radius: 100px;
  border: 1px solid rgba(255,255,255,.25);
  transition: var(--transition);
  text-decoration: none;
}
.btn-ghost:hover {
  background: rgba(255,255,255,.1);
  color: var(--white);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.scroll-mouse {
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-dot {
  width: 4px; height: 8px;
  background: rgba(255,255,255,.5);
  border-radius: 2px;
  animation: scrollDot 2s ease-in-out infinite;
}
@keyframes scrollDot {
  0%   { transform: translateY(0); opacity: 1; }
  80%  { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ============================================================
   ABOUT
   ============================================================ */
#about {
  padding: 100px 0;
  background: var(--white);
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 64px;
}

.about-lead {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--navy);
  line-height: 1.7;
  margin-bottom: 20px;
}
.about-text p {
  color: var(--gray-700);
  margin-bottom: 16px;
  line-height: 1.75;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.stat-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.stat-box:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-sm);
}
.stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-lbl {
  font-size: .8rem;
  font-weight: 600;
  color: var(--gray-600);
  letter-spacing: .04em;
  text-transform: uppercase;
}

/* Topics */
.topics-section h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-700);
  text-align: center;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.topics-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.topic-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--blue-pale);
  color: var(--blue);
  font-size: .875rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid rgba(43,92,173,.12);
  transition: var(--transition);
}
.topic-chip:hover {
  background: var(--blue);
  color: var(--white);
}
.tc-icon { font-size: 1em; }

/* ============================================================
   CONFERENCES
   ============================================================ */
#conferences {
  padding: 100px 0;
  background: var(--gray-50);
}

.conf-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

/* Card */
.conf-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-100);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}
.conf-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.conf-card-featured {
  border-color: var(--gold);
  box-shadow: 0 0 0 2px rgba(200,160,0,.2), var(--shadow-md);
}
.conf-featured-ribbon {
  position: absolute;
  top: 20px; right: -30px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--navy-dark);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 36px;
  transform: rotate(35deg);
  transform-origin: center;
  z-index: 2;
  width: 120px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(200,160,0,.3);
}

/* Card Header */
.conf-card-header {
  padding: 28px 24px 20px;
  text-align: center;
}
.ch-2022 { background: linear-gradient(135deg, #1b3a6b, #2b5cad); }
.ch-2023 { background: linear-gradient(135deg, #1a3a5c, #2176ae); }
.ch-2024 { background: linear-gradient(135deg, #1e3560, #2b5cad); }
.ch-2025 { background: linear-gradient(135deg, #1b2d4f, #1e3f72); }

.conf-edition-badge {
  display: inline-block;
  background: rgba(255,255,255,.2);
  color: rgba(255,255,255,.9);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.conf-logo-text {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: 8px;
}
.conf-logo-text span {
  color: var(--gold-light);
}
.conf-date-label {
  font-size: .82rem;
  color: rgba(255,255,255,.7);
  font-weight: 500;
}

/* Card Body */
.conf-card-body {
  padding: 24px;
}
.conf-theme {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.4;
  margin-bottom: 16px;
  min-height: 56px;
}
.conf-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.ctag {
  font-size: .72rem;
  font-weight: 600;
  color: var(--blue);
  background: var(--blue-pale);
  padding: 3px 10px;
  border-radius: 100px;
  white-space: nowrap;
}
.conf-place {
  font-size: .8rem;
  color: var(--gray-600);
  margin-bottom: 12px;
}
.conf-aegida {
  font-size: .78rem;
  color: var(--gray-600);
  margin-bottom: 16px;
}

/* YouTube links */
.conf-yt {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.yt-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #ff0000;
  color: var(--white);
  font-size: .75rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 6px;
  transition: var(--transition);
  text-decoration: none;
}
.yt-link:hover { background: #cc0000; }
.yt-icon { width: 14px; height: 14px; flex-shrink: 0; }

/* Program Button */
.btn-program {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  justify-content: center;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  color: var(--navy);
  font-size: .875rem;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
}
.btn-program:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}
.btn-program-icon { font-size: 1em; }

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17,30,54,.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal-box {
  background: var(--white);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 780px;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: scale(.94) translateY(20px);
  transition: transform .3s ease;
}
.modal-overlay.open .modal-box {
  transform: scale(1) translateY(0);
}
.modal-close-btn {
  position: sticky;
  top: 16px;
  float: right;
  margin: 16px 16px 0 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gray-100);
  color: var(--gray-700);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: var(--transition);
  cursor: pointer;
}
.modal-close-btn:hover {
  background: var(--navy);
  color: var(--white);
}

/* Modal content styles */
#modal-content { padding: 0 32px 40px; clear: both; }
.modal-header {
  padding: 32px 0 24px;
  border-bottom: 2px solid var(--gray-100);
  margin-bottom: 28px;
}
.modal-edition { font-size: .8rem; font-weight: 700; color: var(--blue-light); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px; }
.modal-title { font-size: 1.8rem; font-weight: 900; color: var(--navy); }
.modal-title span { color: var(--gold); }
.modal-theme { font-size: 1.1rem; font-weight: 600; color: var(--blue); margin-top: 8px; }
.modal-date  { font-size: .9rem; color: var(--gray-600); margin-top: 6px; }

.modal-day-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  background: var(--gray-50);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  margin: 24px 0 16px;
  border-left: 4px solid var(--blue);
}

.session-block {
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--gray-100);
}
.session-block:last-child { border-bottom: none; }
.session-time {
  font-size: .75rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .04em;
  margin-bottom: 4px;
}
.session-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.session-type {
  display: inline-block;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}
.type-session   { background: rgba(43,92,173,.12); color: var(--blue); }
.type-panel     { background: rgba(200,160,0,.12);  color: #8a6d00; }
.type-opening   { background: rgba(27,45,79,.1);    color: var(--navy); }
.type-break     { background: var(--gray-100); color: var(--gray-600); }

.session-coordinator {
  font-size: .82rem;
  color: var(--gray-600);
  margin-bottom: 8px;
  font-style: italic;
}
.speaker-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.speaker-list li {
  font-size: .85rem;
  color: var(--gray-700);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.speaker-list li::before {
  content: '·';
  color: var(--blue-light);
  font-size: 1.2em;
  flex-shrink: 0;
}
.speaker-name  { font-weight: 600; color: var(--navy); }
.speaker-role  { color: var(--gray-600); font-size: .82rem; }

.modal-yt-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-100);
}
.modal-yt-row .yt-link { font-size: .85rem; padding: 8px 16px; }

/* ============================================================
   GALLERY
   ============================================================ */
#gallery {
  padding: 100px 0;
  background: var(--white);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.gallery-item {
  overflow: hidden;
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  cursor: pointer;
  background: var(--gray-100);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-hint {
  text-align: center;
  font-size: .82rem;
  color: var(--gray-600);
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--gray-200);
}
.gallery-hint code {
  background: var(--blue-pale);
  color: var(--blue);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: .85em;
}

/* Lightbox */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,10,20,.95);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}
.lightbox-overlay.open { opacity: 1; pointer-events: all; }
.lightbox-close {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 1.5rem;
  color: var(--white);
  cursor: pointer;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,.25); }
.lightbox-prev, .lightbox-next {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  font-size: 2.5rem;
  color: var(--white);
  cursor: pointer;
  padding: 16px 20px;
  background: rgba(255,255,255,.08);
  border-radius: var(--radius-sm);
  line-height: 1;
  transition: background var(--transition);
}
.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }
.lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,.18); }
.lightbox-img-wrap { max-width: 90vw; max-height: 85vh; }
.lightbox-img-wrap img { max-width: 100%; max-height: 85vh; object-fit: contain; border-radius: 8px; }

/* ============================================================
   ORGANIZERS
   ============================================================ */
#organizers {
  padding: 100px 0;
  background: var(--navy-dark);
}
#organizers .section-label { color: var(--blue-light); }
#organizers .section-header h2 { color: var(--white); }
#organizers .accent { color: var(--blue-light); }

.org-block { margin-bottom: 48px; }
.org-block:last-child { margin-bottom: 0; }
.org-group-title {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.org-row {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.org-item {
  flex: 1;
  min-width: 180px;
  max-width: 260px;
  text-align: center;
}
.org-logo-box {
  border-radius: var(--radius-md);
  padding: 24px 20px;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255,255,255,.1);
  transition: var(--transition);
}
.org-logo-box:hover { border-color: rgba(255,255,255,.25); }
.org-logo-icon { font-size: 2rem; }
.org-logo-box strong {
  font-size: .9rem;
  font-weight: 700;
  color: var(--white);
  text-align: center;
  line-height: 1.3;
}
.org-item > p {
  font-size: .8rem;
  color: rgba(255,255,255,.5);
  line-height: 1.4;
}
.itye       { background: rgba(78,159,212,.1); }
.gnomi      { background: rgba(255,255,255,.05); }
.stede      { background: rgba(200,160,0,.1); }
.perifereia { background: rgba(78,200,100,.08); }
.ypourgio   { background: rgba(255,255,255,.05); }

.supporters-note {
  margin-top: 48px;
  padding: 20px 24px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: .82rem;
  color: rgba(255,255,255,.45);
  line-height: 1.8;
}
.supporters-note strong { color: rgba(255,255,255,.7); }

/* ============================================================
   CONTACT
   ============================================================ */
#contact {
  padding: 100px 0;
  background: var(--gray-50);
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.contact-card:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-md);
}
.contact-icon-wrap { font-size: 2.4rem; margin-bottom: 16px; }
.contact-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.contact-card p {
  font-size: .9rem;
  color: var(--gray-700);
  line-height: 1.6;
}
.contact-card a {
  color: var(--blue);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.contact-card a:hover { color: var(--navy); }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--navy-dark);
  padding: 60px 0 32px;
}
.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 28px;
}
.footer-logo-text {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -.04em;
  line-height: 1;
  margin-bottom: 10px;
}
.footer-a { color: var(--gold-light); }
.footer-tagline {
  font-size: .78rem;
  color: rgba(255,255,255,.45);
  line-height: 1.6;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}
.footer-nav a {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--white); }
.footer-bottom {
  text-align: center;
  font-size: .78rem;
  color: rgba(255,255,255,.3);
}

/* ============================================================
   ABOUT GOALS
   ============================================================ */
.about-goals {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}
.about-goal {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: .9rem;
  color: var(--gray-700);
  line-height: 1.5;
}
.ag-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }

/* ============================================================
   ORG CARDS (with descriptions)
   ============================================================ */
.org-row-cards { align-items: stretch; }
.org-item-card {
  flex: 1;
  min-width: 220px;
  max-width: 340px;
  text-align: left;
  display: flex;
  flex-direction: column;
}
.org-item-card .org-logo-box {
  text-align: center;
  margin-bottom: 12px;
}
.org-short {
  font-size: .78rem;
  font-weight: 700;
  color: var(--gold-light);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin: 0 0 8px;
  line-height: 1.4;
}
.org-desc {
  font-size: .82rem;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}
/* Extra org logo colours */
.olpa { background: rgba(78,159,212,.12); border-color: rgba(78,159,212,.3); }
.psek { background: rgba(200,160,0,.10); border-color: rgba(200,160,0,.3); }

/* ============================================================
   MISSION / VISION / VALUES
   ============================================================ */
.mission-section {
  padding: 80px 0;
  background: var(--gray-50);
}
.mvv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.mvv-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.mvv-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.mvv-icon { font-size: 2rem; margin-bottom: 14px; }
.mvv-card h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.mvv-card p {
  font-size: .9rem;
  color: var(--gray-700);
  line-height: 1.7;
}
.mvv-values-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mvv-values-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .9rem;
  color: var(--gray-700);
  font-weight: 500;
}
.mvv-mission { border-top: 4px solid var(--blue); }
.mvv-vision  { border-top: 4px solid var(--navy); }
.mvv-values  { border-top: 4px solid var(--gold); }

/* ============================================================
   PRESIDENT MESSAGE
   ============================================================ */
.president-section {
  padding: 80px 0;
  background: var(--navy);
}
.president-card {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  padding: 0 24px;
}
.president-quote-mark {
  font-size: 8rem;
  line-height: .6;
  color: var(--gold);
  opacity: .3;
  font-family: Georgia, serif;
  position: absolute;
  top: -10px;
  left: 16px;
  pointer-events: none;
}
.president-quote {
  font-size: 1.05rem;
  color: rgba(255,255,255,.85);
  line-height: 1.8;
  font-style: italic;
  border: none;
  padding: 0;
  margin: 0 0 32px;
  padding-left: 40px;
}
.president-info {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-left: 40px;
}
.president-avatar {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gold);
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: .95rem;
  flex-shrink: 0;
}
.president-name {
  font-size: .95rem;
  font-weight: 700;
  color: var(--white);
}
.president-title {
  font-size: .78rem;
  color: rgba(255,255,255,.55);
  margin-top: 2px;
}

/* ============================================================
   SPONSORSHIP
   ============================================================ */
.sponsorship-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #0f1e38 0%, var(--navy) 50%, #1e3a7a 100%);
}
.sponsorship-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.sponsorship-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
}
.sponsorship-text p {
  font-size: .92rem;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
  margin-bottom: 14px;
}
.sponsorship-tagline {
  color: rgba(255,255,255,.5) !important;
  font-size: .82rem !important;
  border-left: 3px solid var(--gold);
  padding-left: 14px;
  margin: 20px 0 !important;
}
.btn-sponsor {
  display: inline-block;
  margin-top: 8px;
  padding: 13px 28px;
  background: var(--gold);
  color: var(--navy);
  font-weight: 800;
  font-size: .9rem;
  border-radius: 50px;
  text-decoration: none;
  letter-spacing: .3px;
  transition: background var(--transition), transform var(--transition);
}
.btn-sponsor:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
}
.sponsorship-points {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sp-point {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 16px 18px;
}
.sp-point-icon { font-size: 1.4rem; flex-shrink: 0; }
.sp-point div { font-size: .88rem; color: rgba(255,255,255,.75); line-height: 1.5; }
.sp-point strong { color: var(--white); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  /* New sections responsive */
  .mvv-grid { grid-template-columns: 1fr; }
  .sponsorship-inner { grid-template-columns: 1fr; gap: 40px; }
  .org-item-card { min-width: 100%; max-width: 100%; }
  .president-quote { font-size: .92rem; padding-left: 20px; }
  .president-quote-mark { font-size: 5rem; }
  .president-info { padding-left: 20px; }

  /* Nav mobile */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--gray-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-110%);
    transition: transform .3s ease, visibility 0s .3s;
    z-index: 999;
    /* κλειστό: δεν δέχεται touches */
    visibility: hidden;
    pointer-events: none;
    -webkit-overflow-scrolling: touch;
  }
  .nav-links.open {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform .3s ease, visibility 0s 0s;
  }
  .nav-link { padding: 12px 16px; border-radius: var(--radius-sm); }

  /* Hero */
  .hide-mobile { display: none; }
  .hero-badges {
    flex-direction: column;
    border-radius: var(--radius-md);
    padding: 12px 20px;
    gap: 8px;
  }
  .hero-badge-divider { width: 40px; height: 1px; }

  /* About */
  .about-stats { grid-template-columns: 1fr 1fr; gap: 12px; }

  /* Conferences */
  .conf-timeline { grid-template-columns: 1fr; }

  /* Gallery */
  .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }

  /* Modal */
  #modal-content { padding: 0 20px 32px; }
  .modal-title { font-size: 1.4rem; }

  /* Footer */
  .footer-inner { flex-direction: column; gap: 24px; }

  /* Lightbox */
  .lightbox-prev, .lightbox-next { padding: 10px 14px; font-size: 2rem; }

  /* Org */
  .org-item { min-width: 140px; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: center; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .conf-theme { min-height: auto; }
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }