/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1.5rem;
  z-index: 10000;
  background: #0f172a;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid #4285f4;
  outline-offset: 2px;
}

:root {
  color-scheme: light;
  --gdg-blue: #4285F4;
  --gdg-red: #EA4335;
  --gdg-yellow: #FBBC04;
  --gdg-green: #34A853;
  --bg-dark: #090d16;
  --bg-card: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #475569;
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Google Sans', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: #ffffff;
  color: #0f172a;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
}

    /* Background Video Container */
    .hero-video-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
      pointer-events: none;
      z-index: 0;
    }

    .hero-poster-picture,
    .hero-poster-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.90;
      filter: saturate(1.15) brightness(1.02);
      z-index: 0;
    }

    .hero-video {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.90;
      filter: saturate(1.15) brightness(1.02);
      z-index: 1;
      transition: opacity 0.5s ease;
    }

    .video-overlay-light-dark {
      position: absolute;
      inset: 0;
      background: rgba(9, 13, 22, 0.38);
      z-index: 2;
    }

    .video-overlay-gradient-h {
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 50% 50%, rgba(9, 13, 22, 0.45) 0%, rgba(9, 13, 22, 0.15) 65%, transparent 100%);
      z-index: 3;
    }

    .video-overlay-gradient-v {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(9, 13, 22, 0.25) 0%, transparent 40%, rgba(9, 13, 22, 0.45) 100%);
      z-index: 4;
    }

    /* Navigation Bar */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      width: 100%;
      border-bottom: 1px solid rgba(0, 0, 0, 0.08);
      backdrop-filter: blur(16px);
      background: rgba(255, 255, 255, 0.95);
      color: #1e1e1e;
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
    }

    .nav-container {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0.9rem 1.5rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: relative;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      text-decoration: none;
      z-index: 2;
      flex: 0 0 auto;
    }

    .nav-logo-svg {
      height: 36px;
      width: auto;
      display: block;
    }

    .nav-logo:hover .nav-logo-svg {
      transform: none;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      flex: 1 1 auto;
    }

    .nav-menu-link {
      color: #000000;
      text-decoration: none;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 0.55rem 1rem;
      border-radius: 100px;
      line-height: 1;
      display: inline-flex;
      align-items: center;
      transition: color 0.2s ease;
    }

    .nav-menu-link:hover {
      color: #ff7daf;
      background: transparent;
    }

    .nav-menu-link-disabled {
      position: relative;
      color: #525252;
      opacity: 0.85;
      cursor: not-allowed;
      user-select: none;
    }

    .nav-menu-link-disabled:hover {
      color: #525252 !important;
      text-decoration: none !important;
    }

    /* Custom "Coming Soon" Tooltip (Below text, inside header) */
    .nav-menu-link-disabled::after {
      content: "Coming Soon";
      position: absolute;
      top: calc(100% - 5px);
      left: 50%;
      transform: translateX(-50%) translateY(2px);
      background: #0f172a;
      color: #ffffff;
      font-size: 0.65rem;
      font-weight: 700;
      letter-spacing: 0.03em;
      padding: 0.2rem 0.5rem;
      border-radius: 5px;
      white-space: nowrap;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s ease, transform 0.2s ease;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      z-index: 1000;
      line-height: 1.2;
    }

    .nav-menu-link-disabled:hover::after {
      opacity: 1;
      transform: translateX(-50%) translateY(0);
    }

    .nav-right-actions {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0.75rem;
      z-index: 2;
      flex: 0 0 auto;
    }

    /* Mobile Hamburger Menu Toggle Button */
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 0.5rem;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      z-index: 1001;
    }

    .hamburger-line {
      display: block;
      width: 22px;
      height: 2px;
      background-color: #000000;
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    }

    /* Animated Hamburger Icon when Active (X shape) */
    .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
      opacity: 0;
    }

    .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .nav-link {
      padding: 0.55rem 1.25rem;
      border-radius: 100px;
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: #1e1e1e;
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
      backdrop-filter: blur(8px);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
    }

    .nav-link:hover {
      border-color: #000000;
      background: #f1f5f9;
      color: #000000;
    }

    .nav-link-primary {
      background: #1e1e1e;
      color: #ffffff;
      border: none;
      border-radius: 100px;
      padding: 14px 32px;
      font-weight: 700;
      font-size: 15px;
      letter-spacing: -0.01em;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
      transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .nav-link-primary:hover {
      background: #ff7daf;
      color: #000000;
      transform: none;
      box-shadow: none;
    }

    /* Hero Section */
    .hero-section {
      position: relative;
      min-height: calc(100vh - 80px);
      display: flex;
      align-items: center;
      padding: 5rem 1.5rem;
      background-color: #090d16;
      color: #f8fafc;
    }

    .hero-container {
      position: relative;
      z-index: 20;
      max-width: 1140px;
      margin: 0 auto;
      width: 100%;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .hero-tagline-link {
      display: inline-block;
      font-size: 0.95rem;
      font-weight: 600;
      text-transform: none;
      letter-spacing: normal;
      color: var(--gdg-blue);
      text-decoration: none;
      margin-bottom: 1.25rem;
      transition: color 0.2s ease;
    }

    .hero-tagline-link:hover {
      color: #669df6;
      text-decoration: underline;
    }

    .hero-title {
      font-size: clamp(3rem, 8.5vw, 6rem);
      font-weight: 800;
      line-height: 0.95;
      letter-spacing: -0.03em;
      max-width: 950px;
      margin: 0 auto;
      color: #ffffff;
      text-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    }

    .title-dimmed {
      color: #f9ab00;
      opacity: 1;
      font-weight: 800;
    }

    .hero-desc {
      font-size: clamp(1.05rem, 2vw, 1.35rem);
      color: #ffffff;
      font-weight: 400;
      max-width: 850px;
      margin: 1.75rem auto 0;
      line-height: 1.6;
      text-shadow: 0 2px 10px rgba(0, 0, 0, 0.7);
    }

    .hero-teaser-link {
      position: absolute;
      bottom: 2rem;
      right: 2.5rem;
      z-index: 25;
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      color: #ffffff;
      font-size: 0.98rem;
      font-weight: 300;
      text-decoration: none;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
      transition: color 0.2s ease;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 0;
    }

    .hero-teaser-link:hover {
      color: #f9ab00;
      text-decoration: none;
    }

    .hero-teaser-link .teaser-icon-svg {
      width: 18px;
      height: 18px;
      fill: #ffffff;
      stroke: none;
      transition: fill 0.2s ease, transform 0.2s ease;
    }

    .hero-teaser-link:hover .teaser-icon-svg {
      fill: #f9ab00;
      transform: scale(1.15);
    }

    .event-details-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 1.5rem;
      margin: 2.25rem auto 0;
      font-size: 0.98rem;
      font-weight: 300;
      color: #ffffff;
      background: transparent;
      padding: 0;
      border-radius: 0;
      border: none;
      backdrop-filter: none;
    }

    .detail-item {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      color: #ffffff;
      font-weight: 300;
      text-decoration: none;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
    }

    .detail-item-link {
      transition: color 0.2s ease;
    }

    .detail-item-link:hover {
      color: #f9ab00;
      text-decoration: none;
    }

    .icon-svg {
      width: 18px;
      height: 18px;
      stroke: #ffffff;
      stroke-width: 1.75;
      fill: none;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: stroke 0.2s ease;
    }

    .detail-item-link:hover .icon-svg {
      stroke: #f9ab00;
    }

    .detail-divider {
      width: 1px;
      height: 1.25rem;
      background-color: rgba(255, 255, 255, 0.25);
    }

    /* Action Buttons */
    .cta-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 1.75rem;
      margin: 2.5rem auto 0;
    }

    /* ==========================================
       UNIFIED BUTTON DESIGN SYSTEM
       ========================================== */
    .btn,
    .nav-link-primary,
    .btn-solid,
    .btn-negative,
    .btn-outlined,
    .btn-sponsor {
      height: 48px;
      min-height: 48px;
      max-height: 48px;
      line-height: 44px;
      padding: 0 28px;
      border-radius: 9999px;
      font-size: 15px;
      font-weight: 700;
      letter-spacing: -0.01em;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      box-sizing: border-box;
      box-shadow: none !important;
      transform: none !important;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
      cursor: pointer;
    }

    .btn:hover,
    .nav-link-primary:hover,
    .btn-solid:hover,
    .btn-negative:hover,
    .btn-outlined:hover,
    .btn-sponsor:hover {
      box-shadow: none !important;
      transform: none !important; /* No Y-lift / bounce on hover */
    }

    /* 1) Solid Black Buttons (e.g. Header & Countdown Get Your Ticket) -> Pink (#ff7daf) on Hover */
    .btn-solid,
    .nav-link-primary {
      background-color: #000000;
      color: #ffffff;
      border: 2px solid #000000;
    }

    .btn-solid:hover,
    .nav-link-primary:hover {
      background-color: #ff7daf; /* Pink hover color */
      color: #000000; /* Black text on pink */
      border-color: #ff7daf;
      transform: none !important;
    }

    /* 2) Unique White Negative Hero Button ("Get Your Ticket" in DevFest Krakow 2026 section) */
    .btn-negative {
      background-color: #ffffff;
      color: #000000;
      border: 2px solid #ffffff;
    }

    .btn-negative:hover {
      background-color: #ff7daf; /* Pink hover color */
      color: #000000; /* Black text on pink */
      border-color: #ff7daf;
      transform: none !important;
    }

    /* 2) Transparent Outlined Buttons (Stroke-only, background stays transparent on hover, stroke and text turn Pink #ff7daf) */
    /* Light Section Variant (Black stroke & black text -> Pink stroke & pink text on hover) */
    .btn-outlined {
      background: transparent !important;
      color: #000000;
      border: 2px solid #000000;
      backdrop-filter: none;
    }

    .btn-outlined:hover {
      background: transparent !important;
      color: #ff7daf; /* Pink text */
      border-color: #ff7daf; /* Pink stroke */
      transform: none !important;
    }

    /* Dark/Hero Section Variant (White stroke & white text -> Pink stroke & pink text on hover) */
    .hero-section .btn-outlined,
    .btn-outlined-dark {
      background: transparent !important;
      color: #ffffff;
      border: 2px solid #ffffff;
    }

    .hero-section .btn-outlined:hover,
    .btn-outlined-dark:hover {
      background: transparent !important;
      color: #ff7daf; /* Pink text */
      border-color: #ff7daf; /* Pink stroke */
      transform: none !important;
    }

    .link-blue {
      color: #4285f4;
      font-weight: 600;
      font-size: 1.05rem;
      text-decoration: none;
      transition: color 0.2s ease, text-decoration 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      cursor: pointer;
    }

    .link-blue:hover {
      color: #ff7daf;
      text-decoration: none !important;
    }

    /* Section Styles (Light Theme for Content below Hero) */
    section:not(.hero-section) {
      position: relative;
      border-top: none;
      padding: 5rem 1.5rem;
      scroll-margin-top: 80px;
      background-color: #ffffff;
      color: #0f172a;
    }

    #gallery,
    #cfp,
    #countdown {
      background-color: #f0f0f0;
    }

    #about,
    #partners {
      background-color: #ffffff;
    }

    .coming-soon-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      background: #e2e8f0;
      color: #64748b;
      border: 1px solid #cbd5e1;
    }

    .section-container {
      max-width: 1140px;
      margin: 0 auto;
    }

    .section-tag {
      font-size: 0.9rem;
      font-weight: 600;
      text-transform: none;
      letter-spacing: normal;
      color: #64748b;
      margin-bottom: 0.5rem;
    }

    .section-heading {
      font-size: clamp(2.25rem, 5vw, 3.25rem);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.1;
      max-width: 750px;
      color: #0f172a;
    }

    .section-subtext {
      font-size: 1.1rem;
      color: #475569;
      margin-top: 1rem;
      max-width: 1050px;
      line-height: 1.6;
      text-align: center;
    }

    /* Countdown Section Layout (Centered & Compact) */
    .countdown-layout-grid,
    .countdown-layout-centered {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      margin: 0 auto;
    }

    .countdown-grid {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 1.35rem;
      margin-top: 1.75rem;
      flex-wrap: nowrap;
    }

    .timer-box {
      background: #ffffff;
      border: 2px solid #000000;
      border-radius: 16px;
      padding: 1rem 0.65rem;
      width: 108px;
      text-align: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
      transition: transform 0.2s ease;
      box-sizing: border-box;
    }

    .timer-box:hover {
      transform: translateY(-2px);
    }

    @keyframes countPulse {

      0%,
      100% {
        transform: scale(1);
      }

      50% {
        transform: scale(1.03);
      }
    }

    .timer-num {
      font-size: clamp(24px, 4vw, 44px);
      font-weight: 800;
      letter-spacing: -0.03em;
      color: #0f172a;
      line-height: 1;
      animation: 1s ease-in-out countPulse;
    }

    .timer-lbl {
      font-size: 0.65rem;
      text-transform: uppercase;
      letter-spacing: 0.07em;
      color: #64748b;
      margin-top: 0.4rem;
      font-weight: 700;
    }

    /* Countdown Picture Card */
    .countdown-img-card {
      display: flex;
      justify-content: center;
      align-items: center;
      background: #ffffff;
      border: 2px solid #000000;
      border-radius: 28px;
      padding: 0.85rem;
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
      transition: all 0.3s ease;
    }

    .countdown-hero-img {
      width: 100%;
      height: auto;
      max-height: 420px;
      object-fit: contain;
      border-radius: 20px;
      transition: transform 0.3s ease;
    }

    .countdown-img-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 42px rgba(0, 0, 0, 0.18);
    }

    .countdown-hero-img:hover {
      transform: scale(1.02);
    }

    .dragon-inner-frame {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.85rem;
    }

    .dragon-icon-wrapper {
      font-size: 4.5rem;
      line-height: 1;
      filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.15));
      animation: floatDragon 3s ease-in-out infinite alternate;
    }

    @keyframes floatDragon {
      from {
        transform: translateY(0);
      }

      to {
        transform: translateY(-8px);
      }
    }

    .dragon-title {
      font-weight: 700;
      font-size: 1.25rem;
      color: #0f172a;
    }

    .dragon-sub {
      font-size: 0.88rem;
      color: #64748b;
      max-width: 250px;
      line-height: 1.5;
    }

    /* About Feature Cards Grid */
    .about-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
      margin-top: 2.5rem;
    }

    @media (max-width: 900px) {
      .about-cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 600px) {
      .about-cards-grid {
        grid-template-columns: 1fr;
      }
    }

    .about-feature-card {
      background: #ffffff;
      border: 2px solid #000000;
      border-radius: 20px;
      padding: 2.25rem 1.75rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      box-shadow: none;
      transition: none;
    }

    .about-feature-card:hover {
      transform: none;
      box-shadow: none;
      background: #ffffff;
      border: 2px solid #000000;
    }

    .about-card-icon {
      height: 60px;
      width: auto;
      display: block;
      margin: 0 auto 1.5rem auto;
      object-fit: contain;
    }

    .about-card-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: #1e1e1e;
      line-height: 1.25;
    }

    .about-card-desc {
      font-size: 0.95rem;
      color: #475569;
      margin-top: 0.75rem;
      line-height: 1.6;
    }

    .pillar-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
    }

    .pillar-desc {
      font-size: 0.95rem;
      color: #475569;
      margin-top: 0.5rem;
      line-height: 1.5;
    }

    /* Dual Cards Grid */
    .dual-cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 1.5rem;
      margin-top: 3rem;
    }

    .info-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 2.25rem 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 1.25rem;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    }

    .card-cfp {
      border: 1px solid rgba(251, 188, 4, 0.4);
    }

    .card-sponsor {
      border: 1px solid rgba(52, 168, 83, 0.4);
    }

    .card-badge-yellow {
      color: #b45309;
      font-weight: 700;
      font-size: 1.15rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .card-badge-green {
      color: #15803d;
      font-weight: 700;
      font-size: 1.15rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }

    .card-text {
      font-size: 1rem;
      color: #475569;
      line-height: 1.6;
    }

    .card-highlight {
      color: #0f172a;
      font-weight: 700;
    }

    /* 4-Card Photo Gallery Grid Carousel */
    .gallery-grid-carousel {
      position: relative;
      margin-top: 2.5rem;
      display: flex;
      align-items: center;
      gap: 1.25rem;
    }

    .gallery-cards-grid {
      flex: 1;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.25rem;
      transition: opacity 0.25s ease;
    }

    @media (max-width: 900px) {
      .gallery-cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 600px) {
      .gallery-grid-carousel {
        gap: 0.5rem;
      }

      .gallery-cards-grid {
        grid-template-columns: 1fr;
      }

      .gallery-nav-btn {
        padding: 0.25rem;
      }

      .gallery-nav-btn svg {
        width: 28px;
        height: 28px;
      }
    }

    .gallery-photo-card {
      position: relative;
      border-radius: 18px;
      overflow: hidden;
      aspect-ratio: 4 / 3;
      background: #090d16;
      border: 2px solid #000000;
      box-shadow: none;
      cursor: pointer;
      transition: border-color 0.2s ease;
    }

    .gallery-photo-card:hover {
      transform: none;
      box-shadow: none;
      border-color: #ff7daf;
    }

    .gallery-photo-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .gallery-photo-card:hover img {
      transform: none;
    }

    .gallery-nav-btn {
      background: transparent;
      border: none;
      box-shadow: none;
      color: #0f172a;
      padding: 0.5rem;
      width: auto;
      height: auto;
      min-width: auto;
      border-radius: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      flex-shrink: 0;
      transition: color 0.2s ease, transform 0.2s ease;
      user-select: none;
    }

    .gallery-nav-btn:hover {
      background: transparent;
      border: none;
      color: #ff7daf;
      transform: scale(1.2);
      box-shadow: none;
    }

    /* Lightbox Modal (Full-Screen View Mode) */
    .lightbox-modal {
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: rgba(5, 7, 13, 0.96);
      backdrop-filter: blur(16px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .lightbox-modal.active {
      opacity: 1;
      pointer-events: auto;
    }

    .lightbox-header {
      position: absolute;
      top: 0;
      right: 0;
      padding: 1.5rem 2rem;
      display: flex;
      justify-content: flex-end;
      align-items: center;
      z-index: 10010;
    }

    .lightbox-close-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #ffffff;
      font-size: 1.5rem;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .lightbox-close-btn:hover {
      background: rgba(239, 68, 68, 0.8);
      border-color: #ef4444;
      transform: rotate(90deg);
    }

    .lightbox-stage {
      position: relative;
      width: 90vw;
      height: 80vh;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .lightbox-img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      border-radius: 12px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
      transition: opacity 0.25s ease, transform 0.25s ease;
    }

    .lightbox-nav-btn {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.25);
      color: #ffffff;
      font-size: 1.8rem;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      z-index: 10010;
      transition: all 0.2s ease;
    }

    .lightbox-nav-btn:hover {
      background: rgba(255, 255, 255, 0.25);
      border-color: rgba(255, 255, 255, 0.6);
      color: #ffffff;
      transform: translateY(-50%) scale(1.05);
    }

    .lightbox-nav-prev {
      left: 1.5rem;
    }

    .lightbox-nav-next {
      right: 1.5rem;
    }

    /* Full-Size Prominent Partner Logos Grid */
    .partners-full-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 1.25rem 3.5rem;
      margin-top: 2rem;
    }

    .partner-full-link {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0.5rem;
      text-decoration: none;
      transition: transform 0.25s ease;
      background: transparent;
      border: none;
      box-shadow: none;
    }

    .partner-full-link:hover {
      transform: translateY(-4px);
    }

    .partner-full-img {
      width: 220px;
      max-width: 100%;
      height: auto;
      object-fit: contain;
      filter: brightness(1);
    }

    .btn-sponsor {
      border: 2px solid #1e1e1e;
      background: #ffffff;
      color: #1e1e1e;
      font-weight: 700;
      transition: all 0.2s ease;
    }

    .btn-sponsor:hover {
      border-color: #ff7daf !important;
      color: #000000 !important;
      background: #ff7daf !important;
      transform: none !important;
      box-shadow: none !important;
    }

    /* Footer */
    footer {
      border-top: none;
      padding: 2rem 1.5rem;
      background: #ffffff;
      color: #0f172a;
    }

    .footer-container {
      max-width: 1140px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1.25rem;
      text-align: center;
    }

    @media (min-width: 640px) {
      .footer-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        text-align: left;
      }

      .footer-left {
        flex: 0 0 auto;
      }

      .footer-right {
        flex: 0 0 auto;
      }
    }

    .footer-sub {
      color: #64748b;
      font-size: 0.92rem;
      margin-top: 0;
    }

    .footer-gdg-logo-link {
      display: inline-flex;
      align-items: center;
      transition: transform 0.25s ease;
    }

    .footer-gdg-logo-link:hover {
      transform: translateY(-4px);
    }

    .footer-org-link {
      color: var(--gdg-blue);
      text-decoration: none;
      font-weight: 600;
      transition: color 0.2s ease;
    }

    .footer-org-link:hover {
      color: #ff7daf;
      text-decoration: none !important;
    }

    .footer-social-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 9999px;
      background: #ffffff;
      border: 2px solid #000000;
      color: #0f172a;
      text-decoration: none;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
      box-shadow: none;
    }

    .footer-social-btn:hover {
      background: #ff7daf !important;
      border-color: #ff7daf !important;
      color: #000000 !important;
      transform: none !important;
      box-shadow: none !important;
    }

    /* Mini-Game Section */
    .game-section {
      background-color: #f0f0f0 !important;
      text-align: center;
    }

    .game-wrapper {
      max-width: 800px;
      margin: 2rem auto 0;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid rgba(0, 0, 0, 0.1);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
      aspect-ratio: 16 / 9;
    }

    .game-wrapper iframe {
      width: 100%;
      height: 100%;
      border: none;
      display: block;
    }

    .game-hint {
      margin-top: 1rem;
      font-size: 0.88rem;
      font-weight: 500;
      color: #475569;
    }

    /* Leaderboard & High Score Submit Form */
    .leaderboard-container {
      max-width: 800px;
      margin: 2rem auto 0;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .score-submit-card {
      background: linear-gradient(135deg, rgba(66, 133, 244, 0.08) 0%, rgba(52, 168, 83, 0.08) 100%);
      border: 1px solid rgba(66, 133, 244, 0.3);
      border-radius: 16px;
      padding: 1.5rem;
      text-align: center;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      animation: fadeIn 0.3s ease;
    }

    .score-submit-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
    }

    .score-submit-details {
      font-size: 0.95rem;
      color: #475569;
      margin: 0.35rem 0 1rem;
    }

    .score-submit-form {
      display: flex;
      justify-content: center;
      gap: 0.75rem;
      flex-wrap: wrap;
      max-width: 480px;
      margin: 0 auto;
    }

    .player-name-input {
      flex: 1;
      min-width: 220px;
      padding: 0.75rem 1.25rem;
      border-radius: 9999px;
      border: 1px solid rgba(0, 0, 0, 0.15);
      background: #ffffff;
      font-family: inherit;
      font-size: 0.95rem;
      color: #0f172a;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .player-name-input:focus {
      border-color: var(--gdg-blue);
      box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
    }

    .submit-score-btn {
      padding: 0.75rem 1.5rem;
      font-size: 0.95rem;
    }

    .score-submit-msg {
      font-size: 0.88rem;
      font-weight: 600;
      margin-top: 0.75rem;
      color: #16a34a;
    }

    .leaderboard-card {
      background: #ffffff;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 18px;
      padding: 1.75rem;
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.03);
      text-align: left;
    }

    .leaderboard-header {
      margin-bottom: 1.25rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .leaderboard-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
    }

    .leaderboard-subtitle {
      font-size: 0.85rem;
      color: #64748b;
    }

    .leaderboard-list {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
    }

    .leaderboard-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1.25rem;
      border-radius: 12px;
      background: #f8fafc;
      transition: transform 0.2s ease, background-color 0.2s ease;
    }

    .leaderboard-row:hover {
      transform: translateX(4px);
    }

    .leaderboard-row.rank-1 {
      background: rgba(251, 188, 4, 0.15);
      border: 1px solid rgba(251, 188, 4, 0.4);
    }

    .leaderboard-row.rank-2 {
      background: rgba(226, 232, 240, 0.8);
      border: 1px solid rgba(203, 213, 225, 0.6);
    }

    .leaderboard-row.rank-3 {
      background: rgba(217, 119, 6, 0.1);
      border: 1px solid rgba(217, 119, 6, 0.3);
    }

    .leaderboard-player {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 600;
      color: #0f172a;
    }

    .leaderboard-rank {
      font-size: 1.1rem;
      min-width: 28px;
      text-align: center;
    }

    .leaderboard-stats {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      font-weight: 700;
    }

    .leaderboard-score {
      color: var(--gdg-blue);
      font-size: 1.05rem;
    }

    .leaderboard-bagels {
      color: #d97706;
      font-size: 0.92rem;
    }

    .leaderboard-empty {
      text-align: center;
      padding: 2rem 1rem;
      color: #94a3b8;
      font-size: 0.95rem;
    }

    @media (max-width: 640px) {
      .game-wrapper {
        max-width: 100%;
        aspect-ratio: 4 / 5;
        border-radius: 14px;
      }
    }

    /* Mini-Game Section */
    .game-section {
      background-color: #f0f0f0 !important;
      text-align: center;
    }

    .game-wrapper {
      max-width: 800px;
      margin: 2rem auto 0;
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid rgba(0, 0, 0, 0.1);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
      aspect-ratio: 16 / 9;
    }

    .game-wrapper iframe {
      width: 100%;
      height: 100%;
      border: none;
      display: block;
    }

    .game-hint {
      margin-top: 1rem;
      font-size: 0.88rem;
      font-weight: 500;
      color: #475569;
    }

    /* Leaderboard & High Score Submit Form */
    .leaderboard-container {
      max-width: 800px;
      margin: 2rem auto 0;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .score-submit-card {
      background: linear-gradient(135deg, rgba(66, 133, 244, 0.08) 0%, rgba(52, 168, 83, 0.08) 100%);
      border: 1px solid rgba(66, 133, 244, 0.3);
      border-radius: 16px;
      padding: 1.5rem;
      text-align: center;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
      animation: fadeIn 0.3s ease;
    }

    .score-submit-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
    }

    .score-submit-details {
      font-size: 0.95rem;
      color: #475569;
      margin: 0.35rem 0 1rem;
    }

    .score-submit-form {
      display: flex;
      justify-content: center;
      gap: 0.75rem;
      flex-wrap: wrap;
      max-width: 480px;
      margin: 0 auto;
    }

    .player-name-input {
      flex: 1;
      min-width: 220px;
      padding: 0.75rem 1.25rem;
      border-radius: 9999px;
      border: 1px solid rgba(0, 0, 0, 0.15);
      background: #ffffff;
      font-family: inherit;
      font-size: 0.95rem;
      color: #0f172a;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .player-name-input:focus {
      border-color: var(--gdg-blue);
      box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.2);
    }

    .submit-score-btn {
      padding: 0.75rem 1.5rem;
      font-size: 0.95rem;
    }

    .score-submit-msg {
      font-size: 0.88rem;
      font-weight: 600;
      margin-top: 0.75rem;
      color: #16a34a;
    }

    .leaderboard-card {
      background: #ffffff;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 18px;
      padding: 1.75rem;
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.03);
      text-align: left;
    }

    .leaderboard-header {
      margin-bottom: 1.25rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .leaderboard-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #0f172a;
    }

    .leaderboard-subtitle {
      font-size: 0.85rem;
      color: #64748b;
    }

    .leaderboard-list {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
    }

    .leaderboard-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1.25rem;
      border-radius: 12px;
      background: #f8fafc;
      transition: transform 0.2s ease, background-color 0.2s ease;
    }

    .leaderboard-row:hover {
      transform: translateX(4px);
    }

    .leaderboard-row.rank-1 {
      background: rgba(251, 188, 4, 0.15);
      border: 1px solid rgba(251, 188, 4, 0.4);
    }

    .leaderboard-row.rank-2 {
      background: rgba(226, 232, 240, 0.8);
      border: 1px solid rgba(203, 213, 225, 0.6);
    }

    .leaderboard-row.rank-3 {
      background: rgba(217, 119, 6, 0.1);
      border: 1px solid rgba(217, 119, 6, 0.3);
    }

    .leaderboard-player {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 600;
      color: #0f172a;
    }

    .leaderboard-rank {
      font-size: 1.1rem;
      min-width: 28px;
      text-align: center;
    }

    .leaderboard-stats {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      font-weight: 700;
    }

    .leaderboard-score {
      color: var(--gdg-blue);
      font-size: 1.05rem;
    }

    .leaderboard-bagels {
      color: #d97706;
      font-size: 0.92rem;
    }

    .leaderboard-empty {
      text-align: center;
      padding: 2rem 1rem;
      color: #94a3b8;
      font-size: 0.95rem;
    }

    @media (max-width: 640px) {
      .game-wrapper {
        max-width: 100%;
        aspect-ratio: 4 / 5;
        border-radius: 14px;
      }
    }

    /* Mobile Responsive Polish & Hamburger Menu Dropdown */
    @media (max-width: 900px) {
      .countdown-layout-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }

      .mobile-menu-toggle {
        display: flex;
      }

      .nav-menu {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 1.5rem 2rem;
        gap: 1.25rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.25s ease, opacity 0.25s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
      }

      .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }

      .nav-menu-link {
        font-size: 1.1rem;
        padding: 0.5rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 0;
        color: #ffffff;
      }

      .nav-menu-link:last-child {
        border-bottom: none;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 3.5rem 1.25rem;
      }

      .partners-full-grid {
        gap: 2.5rem 2rem;
      }

      .partner-full-img {
        width: 180px;
        max-width: 100%;
        height: auto;
      }

      .countdown-grid {
        flex-wrap: wrap;
        justify-content: center;
      }

      @media (max-width: 480px) {
        .countdown-grid {
          display: grid;
          grid-template-columns: repeat(2, 1fr);
          gap: 0.75rem;
          width: 100%;
          max-width: 240px;
        }

        .timer-box {
          width: 100%;
        }
      }

      .gallery-overlay {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
        padding: 1.5rem;
      }

      .event-details-row {
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
      }

      .detail-divider {
        display: none;
      }
    }

    @media (max-width: 640px) {
      .nav-container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
      }

      .nav-right-actions {
        width: auto;
        justify-content: flex-end;
        gap: 0.5rem;
      }

      .nav-link-primary {
        padding: 0 16px;
        height: 40px;
        min-height: 40px;
        max-height: 40px;
        line-height: 36px;
        font-size: 13px;
      }

      .nav-link {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
      }

      .hero-section {
        padding: 3rem 1.25rem;
      }

      .hero-teaser-link {
        bottom: 1.25rem;
        right: 1.25rem;
        font-size: 0.9rem;
      }

      .cta-row {
        flex-direction: column;
        width: 100%;
      }

      .btn {
        width: 100%;
      }

      .info-card {
        padding: 1.5rem 1.25rem;
      }
    }

    /* Teaser Video Lightbox Modal */
    .teaser-modal-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(9, 13, 22, 0.94);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 99999;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
      padding: 1.5rem;
      box-sizing: border-box;
    }

    .teaser-modal-overlay.active {
      opacity: 1;
      pointer-events: auto;
    }

    .teaser-modal-content {
      position: relative;
      width: 100%;
      max-width: 960px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .teaser-video-player {
      width: 100%;
      max-height: 80vh;
      border-radius: 16px;
      background: #000000;
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.1);
      outline: none;
    }

    .teaser-close-btn {
      position: absolute;
      top: -46px;
      right: 0;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: #ffffff;
      width: 36px;
      height: 36px;
      border-radius: 9999px;
      font-size: 1.4rem;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.2s ease;
      line-height: 1;
    }

    .teaser-close-btn:hover {
      background: #ff7daf;
      border-color: #ff7daf;
      color: #000000;
    }