/* =============================================================
   NUCLPART.PHYS.UOA.GR — Custom Stylesheet
   Red/maroon theme, typo3-inspired layout
   ============================================================= */

/* --------------------------------------------------
   CSS Variables (custom properties)
-------------------------------------------------- */
:root {
  --color-primary:   #8b0000;   /* dark red / maroon — headings, links, accents */
  --color-primary-dk:#6b0000;
  --color-primary-lt:#a30000;
  --color-nav-bg:    #0075cb;   /* typo3 blue for navbar */
  --color-nav-dk:    #005da8;   /* darker blue for navbar hover/active */
  --color-footer-bg: #000000;   /* entirely black */
  --color-copy-bg:   #000000;
  --font-heading: 'GFS Didot', 'Georgia', serif;
  --font-body:    'Roboto', 'Open Sans', sans-serif;
  --font-size-base: 16px;
}

/* --------------------------------------------------
   Base Typography
-------------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.75;
  color: #222;
  background-color: #fff;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
}

h1 { font-size: 2.1em; }
h2 { font-size: 1.8em; }
h3 { font-size: 1.5em; }
h4 { font-size: 1.2em; }

p { margin-bottom: 1.2em; }

a {
  color: var(--color-primary);
  transition: color 0.2s;
}
a:hover, a:focus {
  color: var(--color-primary-dk);
  text-decoration: underline;
}

/* --------------------------------------------------
   Under-construction banner + UoA top bar
-------------------------------------------------- */
.site-prelim-frame {
  display: none;
}

.site-prelim-bar {
  background: #fff;
  padding: 2px 0;
  text-align: center;
}

.site-prelim-text {
  margin: 0;
  color: #b00000;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.header__top {
  display: none;
}

/* --------------------------------------------------
   Institutional breadcrumb bar
-------------------------------------------------- */
.nuclpart-inst-bar {
  background-color: #222;
  border-top: 2px solid #3c3c3c;
  border-bottom: 2px solid #3c3c3c;
}
.nuclpart-inst-table {
  display: flex;
  justify-content: space-evenly;
  align-items: center;
  flex-wrap: nowrap;
  padding: 0 5%;
}
.nuclpart-inst-cell {
  flex: 1;
  text-align: center;
  padding: 0;
}
.nuclpart-inst-athena-link {
  display: inline-block;
  position: relative;
  height: 28px;
  width: 28px;
  vertical-align: middle;
  margin-right: 6px;
  flex-shrink: 0;
  padding: 0 !important;
  background: none !important;
}
.nuclpart-inst-athena {
  position: absolute;
  top: 0;
  left: 0;
  height: 28px;
  width: 28px;
  border-radius: 3px;
  transition: opacity 0.2s;
}
.nuclpart-inst-athena-hover {
  opacity: 0;
}
.nuclpart-inst-athena-link:hover .nuclpart-inst-athena-default {
  opacity: 0;
}
.nuclpart-inst-athena-link:hover .nuclpart-inst-athena-hover {
  opacity: 1;
}

.nuclpart-inst-cell a {
  display: inline-block;
  color: #ccc;
  font-size: 11px;
  font-family: "PT Sans", "Trebuchet MS", Tahoma, var(--font-body), sans-serif;
  font-weight: 400;
  letter-spacing: normal;
  text-decoration: none;
  white-space: nowrap;
  padding: 6px 8px;
  border-radius: 5px;
  transition: background-color 0.15s, color 0.15s;
}
.nuclpart-inst-cell a:hover,
.nuclpart-inst-cell a:focus {
  background-color: #000;
  color: #fff;
  text-decoration: none;
}
@media (max-width: 767px) {
  .nuclpart-inst-bar {
    display: none;
  }
}


/* --------------------------------------------------
   Navbar
-------------------------------------------------- */
.nuclpart-navbar {
  background-color: #fff;
  border: none;
  border-bottom: 2px solid #e0e0e0;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  margin-bottom: 0;
  min-height: 0;
  border-radius: 0;
}

@media (min-width: 768px) {
  .nuclpart-navbar .container-fluid {
    display: flex;
    align-items: center;
  }
  .nuclpart-navbar .navbar-header {
    float: none;
    flex-shrink: 0;
  }
  .nuclpart-navbar .navbar-collapse {
    display: flex !important;
    align-items: center;
    float: none;
    flex: 1;
    padding-top: 0;
    padding-bottom: 0;
  }
  .nuclpart-navbar .navbar-nav {
    display: flex !important;
    align-items: center;
    float: none !important;
    margin-top: 0 !important;
    margin-bottom: 0 !important;
  }
  .nuclpart-navbar .navbar-right {
    margin-left: auto;
  }

  /* Equal-width nav cells */
  .nuclpart-main-menu {
    flex: 1 !important;
  }
  .nuclpart-main-menu > li {
    flex: 1;
    display: flex !important;
    align-items: stretch;
    position: relative;
  }
  .nuclpart-main-menu > li > a {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 100%;
    text-align: center;
  }
}

/* Brand / title text */
.nuclpart-navbar .navbar-brand {
  color: #fff !important;
  font-family: var(--font-heading);
  font-size: 0.92em;
  line-height: 1.15;
  padding: 6px 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}
.nuclpart-navbar .navbar-brand .brand-text {
  display: inline-block;
  vertical-align: middle;
}
.nuclpart-navbar .navbar-logo {
  max-height: 36px;
  width: auto;
}

/* Hamburger icon */
.nuclpart-navbar .navbar-toggle {
  border-color: #ccc;
  margin-top: 6px;
  margin-bottom: 6px;
}
.nuclpart-navbar .navbar-toggle .icon-bar {
  background-color: #444;
}
.nuclpart-navbar .navbar-toggle:hover,
.nuclpart-navbar .navbar-toggle:focus {
  background-color: #f5f5f5;
}

/* Kill the theme's top-border on all nav items (active, hover, focus) */
.navbar ul.nav > li > a,
.navbar ul.nav > li > a:hover,
.navbar ul.nav > li > a:focus,
.navbar.navbar-light ul.nav > li > a,
.navbar.navbar-light ul.nav > li > a:hover {
  border-top: none !important;
}

/* Main nav items */
.nuclpart-main-menu > li > a,
.nuclpart-main-menu .dropdown-menu > li > a {
  text-decoration: none !important;
}
/* Override the theme's forced uppercase on all nav links */
.nuclpart-navbar .navbar ul.nav > li > a,
.nuclpart-main-menu > li > a,
.nuclpart-main-menu .dropdown-menu > li > a {
  text-transform: none !important;
}
.nuclpart-main-menu > li > a {
  color: #222 !important;
  font-size: 0.88em;
  font-weight: 500;
  letter-spacing: 0.2px;
  padding: 18px 14px;
  border-top: none;
  background-color: #f2f2f2;
  transition: background-color 0.2s, color 0.2s;
}
.nuclpart-main-menu > li > a:hover,
.nuclpart-main-menu > li > a:focus {
  color: var(--color-primary) !important;
  background-color: #e4e4e4 !important;
  text-decoration: none !important;
  box-shadow: none !important;
}
.nuclpart-main-menu > li.active > a,
.nuclpart-main-menu > .open > a,
.nuclpart-main-menu > .open > a:hover,
.nuclpart-main-menu > .open > a:focus {
  color: var(--color-primary) !important;
  font-weight: 500 !important;
  background-color: #e4e4e4 !important;
}

/* Dropdown caret */
.nav-caret {
  font-size: 0.6em;
  opacity: 0.5;
  vertical-align: middle;
  margin-left: 1px;
  transition: opacity 0.2s;
}
.nuclpart-main-menu > li > a:hover .nav-caret,
.nuclpart-main-menu > .open > a .nav-caret {
  opacity: 1;
}

/* UoA logo — right side of navbar */
.nuclpart-nav-uoa-logo {
  display: flex;
  align-items: center;
}
.nuclpart-uoa-logo-link {
  display: flex !important;
  align-items: center;
  padding: 6px 12px !important;
  background: none !important;
}
.nuclpart-uoa-logo-img {
  height: 38px;
  width: auto;
  opacity: 0.82;
  transition: opacity 0.2s;
}
.nuclpart-uoa-logo-link:hover .nuclpart-uoa-logo-img {
  opacity: 1;
}
@media (max-width: 767px) {
  .nuclpart-nav-uoa-logo {
    display: none;
  }
}

/* Dropdowns */
.nuclpart-main-menu .dropdown-menu {
  background-color: #fff;
  border: none;
  border-top: 2px solid var(--color-primary);
  border-radius: 0 0 4px 4px;
  margin-top: 0;
  padding: 6px 0;
  width: max-content;
  min-width: 100%;
  max-width: 260px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.13);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  pointer-events: none;
  display: block !important;
}
.nuclpart-main-menu .dropdown:hover .dropdown-menu,
.nuclpart-main-menu .dropdown.open .dropdown-menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.nuclpart-main-menu .dropdown-menu > li > a {
  color: #000;
  font-size: 0.95em;
  font-weight: 400;
  letter-spacing: 0.1px;
  padding: 9px 20px;
  position: relative;
  left: 0;
  white-space: normal;
  line-height: 1.35;
  transition: background 0.15s, color 0.15s;
}
.nuclpart-main-menu .dropdown-menu > li > a:hover {
  background-color: #e4e4e4 !important;
  color: var(--color-primary) !important;
  text-decoration: none;
  left: 0 !important;
}

/* Language switcher — smaller text */
.nuclpart-lang-switcher {
  margin-left: 8px;
  border-left: 1px solid rgba(255,255,255,0.25);
}
.nuclpart-lang-switcher > li > a {
  color: rgba(255,255,255,0.8) !important;
  font-size: 0.65em !important;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 14px 8px;
}
.nuclpart-lang-switcher > li.active > a {
  color: #fff !important;
  background-color: var(--color-primary) !important;
}
.nuclpart-lang-switcher > li > a:hover {
  color: #fff !important;
  background-color: var(--color-primary) !important;
}

/* Mobile nav */
@media (max-width: 767px) {
  .nuclpart-main-menu > li > a {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
  }
  .nuclpart-main-menu .dropdown-menu {
    background-color: #fff;
    box-shadow: none;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    position: static;
    display: none !important;
  }
  .nuclpart-main-menu .dropdown.open .dropdown-menu {
    display: block !important;
  }
}

/* --------------------------------------------------
   Banner
-------------------------------------------------- */
.nuclpart-banner {
  position: relative;
  width: 100%;
  min-height: 260px;
  max-height: 450px;
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  display: flex;
  align-items: flex-end;
}
.banner-overlay {
  width: 100%;
  padding: 25px 0 20px;
  background: linear-gradient(transparent 0%, rgba(100, 0, 0, 0.72) 100%);
}
.banner-subtitle {
  font-family: var(--font-body);
  font-size: 0.95em;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.85);
  margin: 0 0 4px;
}
.banner-title {
  font-family: var(--font-heading);
  font-size: 1.55em;
  color: #fff;
  margin: 0;
  line-height: 1.2;
}
@media (max-width: 767px) {
  .nuclpart-banner { min-height: 160px; }
  .banner-title { font-size: 1.3em; }
}

/* --------------------------------------------------
   Main Content Area
-------------------------------------------------- */
.nuclpart-content {
  padding: 45px 0 30px;
}

/* Welcome section */
.nuclpart-welcome h2 {
  font-family: var(--font-heading);
  font-size: 1.9em;
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 8px;
  margin-top: 0;
  margin-bottom: 22px;
}
.nuclpart-welcome p {
  text-align: justify;
  hyphens: auto;
  font-size: 1.02em;
}

/* --------------------------------------------------
   Sidebar
-------------------------------------------------- */
.nuclpart-sidebar {
  padding-left: 28px;
  border-left: 3px solid var(--color-primary);
}
@media (max-width: 767px) {
  .nuclpart-sidebar {
    border-left: none;
    border-top: 3px solid var(--color-primary);
    padding-left: 0;
    padding-top: 25px;
    margin-top: 30px;
  }
}

.sidebar-section-title {
  font-family: var(--font-body);
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #fff;
  background-color: var(--color-primary);
  padding: 8px 12px;
  margin-top: 0;
  margin-bottom: 0;
}

/* News category links */
.news-categories {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  border: 1px solid #ddd;
  border-top: none;
}
.news-categories li {
  border-bottom: 1px solid #eee;
}
.news-categories li:last-child { border-bottom: none; }
.news-categories li a {
  display: block;
  padding: 9px 12px;
  color: #333;
  font-size: 0.85em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}
.news-categories li a:hover {
  background-color: var(--color-primary);
  color: #fff;
  text-decoration: none;
}

/* Recent news items in sidebar */
.sidebar-recent-news {
  margin-top: 6px;
}
.sidebar-news-item {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
  font-size: 0.88em;
  line-height: 1.4;
}
.sidebar-news-item:last-child { border-bottom: none; }
.sidebar-news-date {
  display: block;
  color: #999;
  font-size: 0.85em;
  margin-bottom: 2px;
}
.sidebar-news-item a {
  color: #333;
  font-weight: 500;
}
.sidebar-news-item a:hover { color: var(--color-primary); }

.sidebar-uoa-logo {
  margin-top: 22px;
  text-align: center;
}
.sidebar-uoa-logo img {
  max-width: 100%;
  max-height: 60px;
  width: auto;
  opacity: 0.8;
  transition: opacity 0.2s;
}
.sidebar-uoa-logo a:hover img {
  opacity: 1;
}

/* --------------------------------------------------
   Footer
-------------------------------------------------- */
#nuclpart-footer {
  background-color: var(--color-footer-bg);
  color: #bbb;
  padding: 0 0 30px;
  margin-top: 50px;
}

/* Logos strip — full-width white band */
.footer-logos-band {
  background-color: #fff;
  border-top: 1px solid #ccc;
}
.footer-logos-row {
  padding: 18px 0 14px;
  margin: 0;
}
.footer-logos-row .footer-logo-cell {
  text-align: center;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-logos-row .footer-logo-cell a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.footer-logos-row .footer-logo-cell img {
  max-height: 52px;
  max-width: 100%;
  width: auto;
  transition: opacity 0.2s;
}
.footer-logos-row .footer-logo-cell a:hover img {
  opacity: 0.75;
}

.footer-cols-container {
  padding-top: 22px;
}

.footer-cols { }

.footer-col {
  margin-bottom: 25px;
}

#nuclpart-footer .footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.8em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: #fff;
  margin-top: 0;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
}

#nuclpart-footer .footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
#nuclpart-footer .footer-col ul li {
  margin-bottom: 7px;
}
#nuclpart-footer .footer-col ul li a {
  color: #aaa;
  font-size: 0.85em;
  text-decoration: none;
  transition: color 0.2s;
}
#nuclpart-footer .footer-col ul li a:hover {
  color: #fff;
  text-decoration: none;
}

.footer-contact p {
  font-size: 0.85em;
  line-height: 1.7;
  color: #aaa;
}
.footer-contact a {
  color: #aaa;
}
.footer-contact a:hover { color: #fff; }

/* Copyright strip — matches uoa.gr footer__bottom */
#nuclpart-copyright {
  background-color: #000;
  padding: 2px 0 25px;
}
.footer__copyright {
  border-top: 1px solid rgba(255,255,255,0.2);
  padding-top: 17px;
  display: flex;
  align-items: center;
}
.footer__logo a {
  display: inline-block;
}
.footer__copyright--text {
  padding-left: 13px;
  padding-bottom: 6px;
}
.footer__copyright--text p {
  font-size: 13px;
  font-family: var(--font-body);
  font-style: italic;
  margin-bottom: 0;
  color: rgba(255,255,255,0.5);
}
.footer-lang-switcher {
  margin-left: auto;
  margin-right: 24px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.footer-lang-switcher a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
}
.footer-lang-switcher a.lang-active {
  color: rgba(255,255,255,0.85);
}
.footer-lang-switcher a:hover {
  color: #fff;
}
.footer-lang-switcher .lang-sep {
  color: rgba(255,255,255,0.2);
  padding: 0 2px;
}

/* --------------------------------------------------
   Faculty page
-------------------------------------------------- */
.faculty-rank-heading {
  font-family: var(--font-body);
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #fff;
  background-color: var(--color-primary);
  padding: 8px 12px;
  margin-top: 30px;
  margin-bottom: 0;
}
.faculty-table {
  margin-bottom: 0;
  font-size: 0.9em;
  border: 1px solid #ddd;
}
.faculty-table thead th {
  background-color: #f5f5f5;
  color: #444;
  font-weight: 700;
  font-size: 0.8em;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid #ddd;
}
.faculty-table tbody tr:hover {
  background-color: #fdf5f5;
}
.faculty-table td {
  vertical-align: middle;
  border-color: #eee;
}
.faculty-role {
  display: block;
  font-size: 0.78em;
  color: #999;
  font-weight: 400;
  margin-top: 2px;
}

/* --------------------------------------------------
   Utility / Misc
-------------------------------------------------- */
.btn-template-main,
.btn-default {
  background-color: var(--color-primary);
  border-color: var(--color-primary-dk);
  color: #fff;
}
.btn-template-main:hover,
.btn-default:hover {
  background-color: var(--color-primary-dk);
  border-color: var(--color-primary-dk);
  color: #fff;
}

.text-muted { color: #777; }
blockquote {
  border-left-color: var(--color-primary);
}

/* --------------------------------------------------
   Homepage — Research Boxes
-------------------------------------------------- */
.nuclpart-research-boxes-inner {
  margin-top: 8px;
}

.research-box {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 140px;
  padding: 24px 16px;
  margin: 0 0 16px;
  border: 2px solid var(--color-primary);
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 2px 10px rgba(139,0,0,0.08);
  text-align: center;
  text-decoration: none;
  transition: box-shadow 0.2s, transform 0.2s, background 0.2s;
}

.research-box:hover,
.research-box:focus {
  background: #fff8f5;
  box-shadow: 0 6px 22px rgba(139,0,0,0.18);
  transform: translateY(-3px);
  text-decoration: none;
}

.research-box-title {
  font-family: 'GFS Didot', 'Palatino Linotype', 'Palatino', Georgia, serif;
  font-size: 1.6rem;
  font-style: italic;
  color: var(--color-primary);
  display: block;
  line-height: 1.5;
  letter-spacing: 0.01em;
}