/* ==========================================================================
   SIBACOM Responsive Stylesheet
   ========================================================================== */

/* Header and Navigation */
.sibacom-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--sibacom-border-neu);
  box-shadow: 0 4px 20px rgba(16, 46, 104, 0.08);
  z-index: 999;
  display: flex;
  align-items: center;
  transition: all 0.3s ease;
}

.sibacom-header.is-scrolled {
  background: #FFFFFF;
  box-shadow: 0 10px 30px rgba(16, 46, 104, 0.12);
}

.sibacom-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.sibacom-branding {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  text-decoration: none;
}

.sibacom-branding img.uni-logo {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.sibacom-branding img.society-logo {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.sibacom-branding-divider {
  width: 1.5px;
  height: 36px;
  background-color: var(--sibacom-border);
}

.sibacom-nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.sibacom-nav-link {
  font-family: var(--font-primary);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--sibacom-text-primary);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color 0.25s ease;
}

.sibacom-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--sibacom-primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.sibacom-nav-link:hover {
  color: var(--sibacom-primary);
}

.sibacom-nav-link:hover::after {
  width: 100%;
}

.sibacom-header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sibacom-mobile-toggle {
  display: none;
  background: var(--sibacom-white);
  border: 1px solid var(--sibacom-border-neu);
  box-shadow: var(--neu-flat);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  color: var(--sibacom-primary);
  font-size: 1.2rem;
}

.sibacom-mobile-menu {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  max-height: calc(100vh - var(--header-height));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--sibacom-white);
  box-shadow: 0 15px 35px rgba(16, 46, 104, 0.15);
  border-bottom: 2px solid var(--sibacom-primary);
  padding: 1.25rem 1.75rem 2.5rem 1.75rem;
  z-index: 998;
}

.sibacom-mobile-menu.active {
  display: block;
  animation: sibacomSlideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes sibacomSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.sibacom-mobile-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.sibacom-mobile-nav a {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--sibacom-text-primary);
  padding: 0.65rem 0.5rem;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.sibacom-mobile-nav a:hover,
.sibacom-mobile-nav a:focus {
  background: rgba(23, 63, 145, 0.05);
  color: var(--sibacom-primary);
  padding-left: 0.85rem;
}

/* Footer Styling */
.sibacom-footer {
  background: #0B1938;
  color: #E2E8F0;
  padding: 5rem 0 2rem 0;
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sibacom-footer-brand-wrap {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
  flex-wrap: nowrap;
}

.sibacom-footer-brand-wrap img.uni-logo-footer {
  height: 44px;
  max-height: 44px;
  width: auto;
  max-width: 140px;
  object-fit: contain;
  display: block;
}

.sibacom-footer-brand-divider {
  width: 1.5px;
  height: 32px;
  background: rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.sibacom-footer-brand-wrap img.society-logo,
.sibacom-footer-brand-wrap img.society-logo-white,
.sibacom-footer img.society-logo,
.sibacom-footer img.society-logo-white {
  height: 42px !important;
  max-height: 42px !important;
  width: auto !important;
  max-width: 160px !important;
  object-fit: contain !important;
  display: block !important;
  background: transparent !important;
}

/* Global society-logo constraint so it NEVER overflows anywhere */
img.society-logo {
  max-height: 50px;
  width: auto;
  object-fit: contain;
}

.sibacom-org-card .sibacom-org-logo-wrap img.society-logo,
.sibacom-org-logo-wrap img.org-card-society-logo {
  height: 68px !important;
  max-height: 70px !important;
  width: auto !important;
  max-width: 200px !important;
  object-fit: contain !important;
  display: block !important;
}

.sibacom-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.sibacom-footer h4 {
  color: var(--sibacom-white);
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
}

.sibacom-footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2.5px;
  background: var(--sibacom-techgreen);
  border-radius: 2px;
}

.sibacom-footer p {
  color: #94A3B8;
  font-size: 0.92rem;
}

.sibacom-footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sibacom-footer-links a {
  color: #94A3B8;
  font-size: 0.92rem;
  transition: color 0.25s ease;
}

.sibacom-footer-links a:hover {
  color: var(--sibacom-white);
  padding-left: 4px;
}

.sibacom-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #94A3B8;
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */

/* Laptop & Small Desktop scaling (1081px - 1280px) */
@media (min-width: 1081px) and (max-width: 1280px) {
  .sibacom-nav-desktop {
    gap: 0.85rem;
  }
  .sibacom-nav-link {
    font-size: 0.85rem;
    padding: 0.4rem 0.2rem;
  }
  .sibacom-branding {
    gap: 0.85rem;
  }
  .sibacom-branding img.uni-logo {
    height: 40px;
  }
  .sibacom-branding img.society-logo {
    height: 36px;
  }
  .sibacom-header-actions .sibacom-btn {
    padding: 0.5rem 0.9rem;
    font-size: 0.82rem;
  }
}

/* Tablet Landscape and below (<= 1080px) - Switches to Mobile Navigation */
@media (max-width: 1080px) {
  .sibacom-nav-desktop,
  .sibacom-header-actions .sibacom-btn {
    display: none;
  }
  .sibacom-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
  }
  .sibacom-branding img.uni-logo {
    height: 42px;
  }
  .sibacom-branding img.society-logo {
    height: 38px;
  }
  .sibacom-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  .sibacom-info-cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .sibacom-events-grid,
  .sibacom-events-grid.cols-3,
  .sibacom-events-grid.col-3,
  .sibacom-events-grid.cols-4,
  .sibacom-events-grid.col-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .sibacom-guests-grid,
  .sibacom-speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .sibacom-organizers-grid,
  .sibacom-joint-organizers-grid,
  .sibacom-academic-partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

/* Tablet Portrait and below (<= 868px) */
@media (max-width: 868px) {
  .sibacom-meta-bar {
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.25rem;
    border-radius: var(--radius-lg);
  }
  .sibacom-meta-divider {
    display: none;
  }
  .sibacom-countdown {
    gap: 0.6rem;
  }
  .sibacom-countdown-box {
    padding: 0.75rem 0.9rem;
    min-width: 72px;
  }
  .sibacom-countdown-number {
    font-size: 1.75rem;
  }

  /* Schedule Timeline for Tablet (Left-aligned with unified spine and nodes) */
  .sibacom-timeline {
    --timeline-spine-x: 18px;
    --timeline-padding-left: 3.25rem;
  }
  .sibacom-timeline,
  .sibacom-timeline.layout-alternating,
  .sibacom-timeline.layout-left {
    padding-left: var(--timeline-padding-left) !important;
  }
  .sibacom-timeline::before,
  .sibacom-timeline.layout-alternating::before,
  .sibacom-timeline.layout-left::before,
  .sibacom-timeline-line {
    left: var(--timeline-spine-x) !important;
    transform: translateX(-50%) !important;
  }
  .sibacom-timeline.layout-alternating .sibacom-timeline-item,
  .sibacom-timeline-item {
    width: 100% !important;
    left: 0 !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    margin-bottom: 2rem;
  }
  .sibacom-timeline.layout-alternating .sibacom-timeline-item.item-left .sibacom-timeline-node,
  .sibacom-timeline.layout-alternating .sibacom-timeline-item.item-right .sibacom-timeline-node,
  .sibacom-timeline-node {
    left: calc(var(--timeline-spine-x) - var(--timeline-padding-left)) !important;
    transform: translateX(-50%) !important;
    right: auto !important;
    top: 1.5rem !important;
    width: 36px !important;
    height: 36px !important;
    font-size: 0.88rem !important;
  }
  .sibacom-timeline-dot {
    left: calc(var(--timeline-spine-x) - var(--timeline-padding-left)) !important;
    transform: translateX(-50%) !important;
    right: auto !important;
    top: 1.75rem !important;
  }
  .sibacom-timeline-card {
    padding: 1.5rem 1.65rem;
  }
  .sibacom-footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .sibacom-footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
  .sibacom-section {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
  .sibacom-section-header {
    margin-bottom: 2.5rem;
  }
}

/* Mobile landscape / small tablets (<= 768px) */
@media (max-width: 768px) {
  .sibacom-info-cards-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .sibacom-events-grid,
  .sibacom-events-grid.cols-2,
  .sibacom-events-grid.col-2,
  .sibacom-events-grid.cols-3,
  .sibacom-events-grid.col-3,
  .sibacom-events-grid.cols-4,
  .sibacom-events-grid.col-4 {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sibacom-guests-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sibacom-speakers-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sibacom-organizers-grid,
  .sibacom-joint-organizers-grid,
  .sibacom-academic-partners-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .sibacom-schedule-tabs,
  .sibacom-speaker-filters {
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  .sibacom-day-tab,
  .sibacom-speaker-pill {
    flex-grow: 1;
    min-height: 44px;
    font-size: 0.88rem !important;
  }
  .sibacom-speaker-social a {
    min-width: 44px;
    min-height: 44px;
  }
}

/* Small devices (<= 640px) */
@media (max-width: 640px) {
  .sibacom-footer-brand-wrap {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .sibacom-hero-title {
    font-size: clamp(2.2rem, 8vw, 3rem);
  }
  .sibacom-section-title {
    font-size: clamp(1.75rem, 6vw, 2.35rem);
  }
  .sibacom-day-tab {
    padding: 0.5rem 0.85rem;
    font-size: 0.82rem !important;
  }
}

/* Mobile Portrait (<= 480px) */
@media (max-width: 480px) {
  :root {
    --header-height: 72px;
  }
  .sibacom-hero-title {
    font-size: clamp(2rem, 8vw, 2.5rem);
  }
  .sibacom-hero-tagline {
    font-size: 1.05rem;
  }
  .sibacom-hero-description {
    font-size: 0.95rem;
    line-height: 1.55;
  }
  .sibacom-countdown {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    max-width: 260px;
  }
  .sibacom-branding-divider {
    display: none;
  }
  .sibacom-branding img.society-logo {
    display: none !important;
  }
  .sibacom-container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .neu-card {
    padding: 1.35rem 1.15rem;
  }
  .sibacom-highlight-card {
    padding: 1.5rem;
  }
  .sibacom-timeline {
    --timeline-spine-x: 14px;
    --timeline-padding-left: 2.75rem;
  }
  .sibacom-timeline,
  .sibacom-timeline.layout-alternating,
  .sibacom-timeline.layout-left {
    padding-left: var(--timeline-padding-left) !important;
  }
  .sibacom-timeline::before,
  .sibacom-timeline.layout-alternating::before,
  .sibacom-timeline.layout-left::before,
  .sibacom-timeline-line {
    left: var(--timeline-spine-x) !important;
    transform: translateX(-50%) !important;
  }
  .sibacom-timeline-node {
    left: calc(var(--timeline-spine-x) - var(--timeline-padding-left)) !important;
    transform: translateX(-50%) !important;
    width: 30px !important;
    height: 30px !important;
    font-size: 0.78rem !important;
    top: 1.25rem !important;
  }
  .sibacom-timeline-dot {
    left: calc(var(--timeline-spine-x) - var(--timeline-padding-left)) !important;
    transform: translateX(-50%) !important;
    width: 16px !important;
    height: 16px !important;
    top: 1.5rem !important;
  }
  .sibacom-timeline-card {
    padding: 1.25rem 1.15rem;
  }
  .sibacom-timeline-title {
    font-size: 1.15rem;
  }
  .sibacom-timeline-meta-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .sibacom-timeline-footer-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .sibacom-sponsor-card {
    min-width: 140px;
    padding: 1.25rem 1.5rem;
  }
  .sibacom-event-btn,
  .sibacom-btn {
    min-height: 44px;
    width: 100%;
    justify-content: center;
  }
  .sibacom-event-badges-bar,
  .sibacom-event-badges {
    flex-wrap: wrap;
    gap: 0.4rem;
  }
  .sibacom-footer-brand-wrap img.uni-logo-footer {
    height: 38px;
  }
  .sibacom-footer-brand-wrap img.society-logo,
  .sibacom-footer-brand-wrap img.society-logo-white {
    height: 36px !important;
  }
}

/* Extra small mobile (<= 360px) */
@media (max-width: 360px) {
  .sibacom-hero-title {
    font-size: 1.95rem;
  }
  .sibacom-hero-tagline {
    font-size: 0.95rem;
  }
  .sibacom-countdown-box {
    min-width: 58px;
    padding: 0.5rem 0.6rem;
  }
  .sibacom-countdown-number {
    font-size: 1.45rem;
  }
  .sibacom-event-badges-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
  .sibacom-footer-brand-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .sibacom-footer-brand-divider {
    display: none;
  }
}