/* Rennes Tech custom styles (Bootstrap 5 base) */

/* 1. Base / Layout */
:root {
  --rt-accent: var(--bs-primary);
  --rt-ribbon-bg: #24292e;
  --rt-ribbon-text: #ffffff;
  --rt-focus-ring: 0 0 0 .25rem rgba(13,110,253,.5);
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: #f8f9fa;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #121417;
    color: #e2e6ea;
  }
  header,
  footer,
  .card {
    background-color: #1d2125;
    color: #e2e6ea;
  }
  .card {
    border-color: #2b3136;
  }
  a {
    color: #67b3ff;
  }
  a:hover {
    color: #8dcbff;
  }
}

/* 2. Skip Link */
.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(-110%);
  background: #0d6efd;
  color: #fff;
  padding: .5rem .75rem;
  z-index: 1000;
  text-decoration: none;
  border-radius: 0 0 .25rem .25rem;
}
.skip-link:focus {
  transform: translateY(0);
  outline: none;
  box-shadow: var(--rt-focus-ring);
}

/* 3. Header */
.site-header {
  border-bottom: 1px solid rgba(0,0,0,.08);
  background: linear-gradient(180deg,#ffffff,#f8f9fa);
  position: relative;
}
@media (prefers-color-scheme: dark) {
  .site-header {
    background: linear-gradient(180deg,#1d2125,#161a1d);
    border-color: #2b3136;
  }
}

.branding {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}
.branding img {
  height: 56px;
  width: auto;
}

.utility-links {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: .9rem;
}

.utility-links a {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  text-decoration: none;
  padding: .4rem .65rem;
  border-radius: .4rem;
  color: inherit;
  background: rgba(0,0,0,.03);
  transition: background-color .2s;
}
.utility-links a:hover,
.utility-links a:focus {
  background: rgba(0,0,0,.08);
  outline: none;
}
@media (prefers-color-scheme: dark) {
  .utility-links a {
    background: rgba(255,255,255,.05);
  }
  .utility-links a:hover,
  .utility-links a:focus {
    background: rgba(255,255,255,.12);
  }
}

/* 4. Group Logos Scroller */
.groups-bar {
  margin-top: .75rem;
  padding: .5rem .25rem;
  display: flex;
  gap: .75rem;
  overflow-x: auto;
  overflow-y: hidden; /* prevent vertical scrollbar caused by tall logos */
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}
.groups-bar::-webkit-scrollbar {
  height: 8px;
}
.groups-bar::-webkit-scrollbar-track {
  background: transparent;
}
.groups-bar::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,.25);
  border-radius: 4px;
}
@media (prefers-color-scheme: dark) {
  .groups-bar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.25);
  }
}
.group-logo {
  flex: 0 0 auto;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  scroll-snap-align: center;
  position: relative;
}
.group-logo img {
  height: 100%;          /* force height to fill the 72px container */
  width: auto;           /* keep aspect ratio */
  max-height: 100%;
  max-width: 100%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.15));
  transition: transform .2s;
}
.group-logo a:focus img,
.group-logo a:hover img {
  transform: scale(1.06);
}

/* 5. GitHub Ribbon removed (footer GitHub link retained) */

/* 6. Events */
.events-section {
  padding-top: 2rem;
  padding-bottom: 2.5rem;
}
.events-grid {
  --bs-gutter-y: 1.5rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: none;
  background: #ffffff;
  border-radius: .9rem;
  box-shadow: 0 1px 3px rgba(0,0,0,.08), 0 0 0 1px rgba(0,0,0,.04);
  transition: box-shadow .25s, transform .25s;
}
.article-card:hover,
.article-card:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0,0,0,.14), 0 0 0 1px rgba(0,0,0,.05);
}
@media (prefers-color-scheme: dark) {
  .article-card {
    background: #1d2125;
    box-shadow: 0 0 0 1px #2b3136;
  }
  .article-card:hover,
  .article-card:focus-within {
    box-shadow: 0 0 0 1px #3a4249, 0 4px 14px rgba(0,0,0,.5);
  }
}

/* Thumbnail aspect ratio */
.thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #dee2e6;
}
.thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
@supports not (aspect-ratio: 16 / 9) {
  .thumb-wrapper {
    padding-top: 56.25%;
  }
  .thumb-wrapper img {
    position: absolute;
    top: 0;
    left: 0;
  }
}

/* Card body */
.article-card .card-body {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  padding: 1rem 1rem 1.1rem;
}

.event-meta {
  font-size: .8rem;
  color: #616569;
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-wrap: wrap;
}
@media (prefers-color-scheme: dark) {
  .event-meta {
    color: #9aa0a6;
  }
}

/* Localisation de l'évènement */
.event-location {
  font-size: .75rem;
  color: #495057;
  line-height: 1.25;
  margin-top: .15rem;
  font-style: normal; /* remplace le style inline */
}
.event-location a { color: inherit; text-decoration: none; }
.event-location a:hover, .event-location a:focus { text-decoration: underline; }
.event-location i { color: var(--rt-accent); opacity: .85; }
@media (prefers-color-scheme: dark) {
  .event-location { color: #b4b9bd; }
  .event-location i { opacity: .9; }
}

.event-description {
  font-size: .85rem;
  line-height: 1.35;
  color: #42464a;
  position: relative;
  display: -webkit-box;
  -webkit-line-clamp: 6;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (prefers-color-scheme: dark) {
  .event-description {
    color: #c4c8cc;
  }
}

/* Group badge inside card */
.group-badge {
  position: absolute;
  top: .6rem;
  right: .6rem;
  width: 46px;
  height: 46px;
  border-radius: .5rem;
  background: rgba(255,255,255,.9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
  padding: .3rem;
}
@media (prefers-color-scheme: dark) {
  .group-badge {
    background: rgba(0,0,0,.45);
  }
}
.group-badge img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Buttons / Links */
.card-actions {
  margin-top: auto;
  display: flex;
  justify-content: flex-end;
  padding: 0 1rem 1rem;
}

.card-actions .btn {
  font-size: .75rem;
  text-transform: none;
  letter-spacing: .2px;
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(0,0,0,.08);
  background: #ffffff;
  padding-top: 2rem;
  padding-bottom: 2rem;
  font-size: .9rem;
}
.site-footer a {
  text-decoration: none;
}
.site-footer a:hover,
.site-footer a:focus {
  text-decoration: underline;
}
@media (prefers-color-scheme: dark) {
  .site-footer {
    background: #161a1d;
    border-color: #2b3136;
  }
}

/* Focus enhancements */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #0d6efd;
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* Utility */
.text-muted-strong {
  color: #5c636a;
}

/* Responsive overrides */
@media (max-width: 575.98px) {
  .branding {
    justify-content: space-between;
  }
  .branding h1 {
    font-size: 1.25rem;
    flex: 1 1 auto;
  }
  .utility-links {
    width: 100%;
    padding-top: .5rem;
  }
}

/* Dark mode specific adjustments to avoid over-bright images */
@media (prefers-color-scheme: dark) {
  .thumb-wrapper img {
    filter: brightness(.92);
  }
}

/* Print improvements */
@media print {
  .skip-link,
  .utility-links,
  .groups-bar {
    display: none !important;
  }
  .article-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}