*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 
    :root {
      --black: #000000;
      --white: #ffffff;
    }
 
    body {
      font-family: 'Barlow', sans-serif;
      min-height: 100vh;
    }
 
    nav {
      background: var(--black);
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      /* position: sticky;
      top: 0; */
      z-index: 1000;
      border-bottom: 1px solid #1a1a1a;
    }
 
    .nav-left {
      display: flex;
      align-items: center;
      gap: 12px;
      flex: 1;
    }
 
    .explore-btn {
      display: flex;
      align-items: center;
      gap: 10px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px 4px;
      position: relative;
    }
 
    .explore-btn .explore-label {
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 22px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 0.04em;
      text-transform: uppercase;
      transition: opacity 0.2s;
    }
 
    .explore-btn .explore-icon {
      width: 28px;
      height: 28px;
      border: 1px solid var(--white);
      border-radius: 50%;
      background: var(--black);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      transition: background 0.2s, color 0.2s;
    }
 
    .explore-btn .explore-icon svg {
      width: 12px;
      height: 12px;
      transition: transform 0.3s ease;
    }
 
    .explore-btn:hover .explore-icon {
      background: var(--white);
      color: var(--black);
    }
    .explore-btn:hover .explore-icon svg { transform: rotate(180deg); }
 
    .search-wrap {
      position: relative;
      display: flex;
      align-items: center;
    }
 
    .search-input {
      background: var(--black);
      border: 1px solid #565C65;
      color: var(--white);
      font-family: 'Barlow', sans-serif;
      font-size: 14px;
      padding: 7px 14px 7px 14px;
      width: 220px;
      outline: none;
      transition: border-color 0.2s, width 0.3s ease;
    }
 
    .search-input::placeholder { color: #565C65; }
    .search-input:focus {
      border-color: var(--white);
      width: 260px;
    }
 
    .nav-center {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .nasa-logo {
      height: 44px;
      width: auto;
      cursor: pointer;
    }
 
    .nav-right {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
      justify-content: flex-end;
    }
 
    .dropdown-wrapper {
      position: relative;
    }
 
    .dropdown-btn {
      display: flex;
      align-items: center;
      gap: 7px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px 12px;
      border-radius: 4px;
      transition: background 0.2s;
    }
 
    .dropdown-btn:hover { background: #111111; }
 
    .dropdown-btn .btn-label {
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 17px;
      font-weight: 600;
      color: var(--white);
      letter-spacing: 0.03em;
      text-transform: uppercase;
      white-space: nowrap;
    }
 
    .dropdown-btn .chevron {
      width: 14px;
      height: 14px;
      color: var(--white);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }
 
    .dropdown-wrapper:hover .chevron { transform: rotate(180deg); }
 
    .dropdown-menu {
      position: absolute;
      top: calc(100% + 8px);
      right: 0;
      background: #0a0a0a;
      border: 1px solid #222;
      border-radius: 6px;
      min-width: 200px;
      padding: 8px 0;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
      box-shadow: 0 12px 40px rgba(0,0,0,0.7);
      z-index: 1003;
    }
 
    .dropdown-wrapper:hover .dropdown-menu {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
 
    .dropdown-menu a {
      display: block;
      padding: 10px 18px;
      color: #cccccc;
      text-decoration: none;
      font-size: 14px;
      font-family: 'Barlow', sans-serif;
      transition: background 0.15s, color 0.15s;
      letter-spacing: 0.02em;
    }
 
    .dropdown-menu a:hover {
      background: #1a1a1a;
      color: var(--white);
    }
 
    .nasaplus-wrapper {
      position: relative;
      display: flex;
      align-items: center;
    }
 
    .nasaplus-btn {
      display: flex;
      align-items: center;
      gap: 7px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px 8px 8px 12px;
      border-radius: 4px;
      transition: background 0.2s;
    }
 
    .nasaplus-btn .btn-label {
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 17px;
      font-weight: 600;
      color: var(--white);
      letter-spacing: 0.03em;
      text-transform: uppercase;
    }
 
    .live-btn {
      display: flex;
      align-items: center;
      gap: 5px;
      background: var(--black);
      border: 1px solid #ff0000;
      border-radius: 3px;
      color: var(--white);
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      padding: 4px 9px;
      cursor: pointer;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }
 
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.7); }
    }
 
    .live-btn:hover {
      background: #ff0000;
      color: var(--white);
    }
    
    .nasaplus-wrapper:hover .nasaplus-dropdown {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
 
    .explore-dropdown {
      position: absolute;
      top: calc(100% + 8px);
      left: 0;
      background: #0a0a0a;
      border: 1px solid #222;
      border-radius: 6px;
      min-width: 200px;
      padding: 8px 0;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
      box-shadow: 0 12px 40px rgba(0,0,0,0.7);
      z-index: 1002;
    }
 
    .explore-wrapper:hover .explore-dropdown {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
 
    .explore-wrapper { position: relative; }
 
    .explore-dropdown a {
      display: block;
      padding: 10px 18px;
      color: #cccccc;
      text-decoration: none;
      font-size: 14px;
      font-family: 'Barlow', sans-serif;
      transition: background 0.15s, color 0.15s;
    }
 
    .explore-dropdown a:hover {
      background: #1a1a1a;
      color: var(--white);
    }
 
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      flex-shrink: 0;
    }
 
    .hamburger span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--white);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }
 
    .mobile-search-icon {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      color: var(--white);
      padding: 6px;
      flex-shrink: 0;
      align-items: center;
      justify-content: center;
    }
    .mobile-search-icon svg { width: 20px; height: 20px; }
 
    .mobile-search-bar {
      display: none;
      position: fixed;
      top: 64px;
      left: 0; right: 0;
      background: var(--black);
      border-bottom: 1px solid #222;
      padding: 12px 16px;
      z-index: 1001;
    }
    .mobile-search-bar.open { display: block; }
    .mobile-search-bar input {
      background: var(--black);
      border: 1px solid #565C65;
      border-radius: 4px;
      color: var(--white);
      font-family: 'Barlow', sans-serif;
      font-size: 15px;
      padding: 10px 14px;
      width: 100%;
      outline: none;
    }
    .mobile-search-bar input::placeholder { color: #565C65; }
    .mobile-search-bar input:focus { border-color: var(--white); }
 
    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0; right: 0;
      background: var(--black);
      border-top: 1px solid #222;
      padding: 0 0 24px;
      z-index: 999;
      flex-direction: column;
      max-height: calc(100vh - 64px);
      overflow-y: auto;
    }
    .mobile-menu.open { display: flex; }
 
    .mobile-explore-section { padding: 8px 0 4px; }
 
    .mobile-explore-section a {
      display: block;
      padding: 12px 20px;
      color: var(--white);
      text-decoration: none;
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 18px;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      transition: background 0.15s, padding-left 0.2s;
    }
    .mobile-explore-section a:hover { background: #111; padding-left: 26px; }
 
    .mobile-divider {
      height: 2px;
      background: #2a2a2a;
      margin: 6px 0;
      border: none;
      flex-shrink: 0;
    }
 
    .mobile-right-section { padding: 4px 0 8px; }
 
    .mobile-nav-group-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 13px 20px;
      color: var(--white);
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 18px;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      cursor: pointer;
      transition: background 0.15s;
      user-select: none;
    }
    .mobile-nav-group-title:hover { background: #111; }
    .mobile-nav-group-title .m-chevron {
      width: 14px; height: 14px;
      color: var(--white);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }
    .mobile-nav-group-title.expanded .m-chevron { transform: rotate(180deg); }

    .mobile-nasaplus-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 20px;
      cursor: pointer;
      transition: background 0.15s;
    }
    .mobile-nasaplus-row:hover { background: #111; }
    .mobile-nasaplus-row .np-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .mobile-nasaplus-row .np-label {
      font-family: 'Barlow Condensed', sans-serif;
      font-size: 18px;
      font-weight: 600;
      color: var(--white);
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    .mobile-nasaplus-row .m-chevron {
      width: 14px; height: 14px;
      color: var(--white);
      transition: transform 0.3s ease;
    }
    .mobile-nasaplus-row.expanded .m-chevron { transform: rotate(180deg); }


     @media (max-width: 1024px) {
      .search-input { width: 160px; }
      .search-input:focus { width: 200px; }
      .dropdown-btn .btn-label,
      .nasaplus-btn .btn-label { font-size: 15px; }
    }
 
    @media (max-width: 820px) {
      .nav-right .dropdown-wrapper,
      .nav-right .nasaplus-wrapper { display: none; }
      .search-wrap { display: none; }
      .nav-left .explore-wrapper { display: none; }
 
      .hamburger { display: flex; }
      .mobile-search-icon { display: flex; }
 
      nav {
        display: grid;
        grid-template-columns: 48px 1fr 48px;
        align-items: center;
        padding: 0 12px;
        gap: 0;
      }
 
      .nav-left {
        flex: unset;
        display: flex;
        justify-content: flex-start;
        align-items: center;
      }
 
      .nav-center {
        display: flex;
        justify-content: center;
        align-items: center;
      }
 
      .nav-right {
        flex: unset;
        display: flex;
        justify-content: flex-end;
        align-items: center;
      }
    }
 
    @media (max-width: 480px) {
      .nasa-logo { height: 36px; }
    }

    .hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 500px;
    overflow: hidden;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background-image: url(./img/hero.jpg);
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    transform: scale(1.03);
    transition: transform 8s ease-out;
  }
  .hero:hover .hero-bg { transform: scale(1); }

  .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
      to right,
      rgba(0,0,0,0.82) 0%,
      rgba(0,0,0,0.55) 40%,
      rgba(0,0,0,0.10) 70%,
      rgba(0,0,0,0.0) 100%
    );
  }

  .hero-bottom-fade {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 220px;
    background: linear-gradient(to top, rgba(0,0,0,0.92) 0%, transparent 100%);
    pointer-events: none;
  }

  .hero-content {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 50%;
    padding: 0 48px;
    z-index: 2;
  }

  .hero-heading {
    font-family: "inter",sans-serif;
    font-size: 4.4rem;
    font-weight: 700;
    color: var(--white);
    line-height: 1.05em;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    opacity: 0;
    animation: fadeUp 0.7s ease forwards 0.35s;
  }

  .hero-para {
    font-family: "Public Sans Web", sans-serif;
    font-size: 1rem;
    font-weight: 200;
    color: var(--white);
    line-height: 1.65em;
    margin-bottom: 32px;
    opacity: 0;
    animation: fadeUp 0.7s ease forwards 0.5s;
  }

  .hero-btn {
    display: inline-block;
    background: #D83933;
    color: var(--white);
    font-family: "inter",sans-serif;
    font-size: 1.38rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 14px 28px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    opacity: 0;
    animation: fadeUp 0.7s ease forwards 0.65s;
  }
  .hero-btn:hover {
    background: #B50909;
    transform: translateY(-2px);
  }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  .hero-bottom {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    z-index: 3;
    display: flex;
    align-items: flex-end;
    padding: 0 0 28px 0;
  }

  .cards-row {
    display: flex;
    flex: 1;
    align-items: stretch;
    min-width: 0;
  }

  .card {
    flex: 1;
    padding: 20px 24px 18px 0px;
    margin-left: 50px;
    border-top: 1px solid rgba(255,255,255,0.25);
    position: relative;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
  }
  .card::after {
    content: '';
    position: absolute;
    top: -1px; left: 0;
    width: 0;
    height: 2px;
    background: #D83933;
    transition: width 0.35s ease;
  }
  .card:hover::after { width: 100%; }

  .card-para {
    font-family: "dm-mono", sans-serif;
    font-size: .7rem;
    font-weight: 500;
    color: var(--white);
    line-height: 2em;
    text-transform: uppercase;
    letter-spacing: 3.5px;
  }

  .card-title {
    display: flex;
    font-family: "inter", sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    line-height: 1.5em;
    letter-spacing: 0.02em;
    gap: 8px;
  }
  
  .card-label-icon {
    width: 20px; height: 20px;
    border-radius: 50%;
    background: #D83933;
    display: flex; 
    align-items: center; 
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
  }
  .card:hover .card-label-icon { background: #B50909; }
  .card-label-icon svg {
    width: 10px; height: 10px;
    color: var(--white);
  }

  .hero-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 28px 0 24px;
    flex-shrink: 0;
  }

  .ctrl-thumb {
    width: 52px; height: 52px;
    border-radius: 50%;
    border: 2px solid var(--white);
    overflow: hidden;
    cursor: pointer;
    flex-shrink: 0;
    transition: border-color 0.2s, transform 0.2s;
  }
  .ctrl-thumb:hover { transform: scale(1.08); }
  .ctrl-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
  }

  .ctrl-play {
    width: 52px; height: 52px;
    border-radius: 50%;
    background: #4E4E4E;
    border: none;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s, transform 0.2s;
    color: var(--white);
  }
  .ctrl-play svg { width: 18px; height: 18px; }

  @media (max-width: 900px) {
    .hero-content { width: 60%; padding: 0 32px; }
    .hero-controls { padding: 0 18px 0 16px; }
  }

  @media (max-width: 640px) {
    .hero-content { width: 100%; padding: 0 20px; top: 30%; }
    .hero-overlay {
      background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0.75) 60%,
        rgba(0,0,0,0.92) 100%
      );
    }
    .hero-btn { display: block; width: 100%; text-align: center; padding: 15px 20px; }
    .hero-bottom { flex-direction: column; align-items: stretch; padding-bottom: 16px; gap: 0; }
    .cards-row { flex-direction: column; }
    .card { border-left: none !important; border-top: 1px solid rgba(255,255,255,0.18); padding: 14px 20px 12px; }
    .hero-controls { padding: 12px 20px; justify-content: flex-end; order: -1; }
  }

  @media (max-width: 380px) {
    .hero-content { padding: 0 16px; }
    .card { padding: 12px 16px 10px; }
    .hero-controls { padding: 10px 16px;}
  }

  .feature-news {
  padding: 2rem 0; 
  margin: 50px;
}

.fn {
  display: flex;
  align-items: center;
  justify-content: space-between;
    margin-bottom: 50px;
}

.fn-heading {
  font-size: 3rem;
  font-weight: bold;
  font-family: "inter", sans-serif;
  line-height: .95em;
  margin: 0;
}

.rb {
  font-size: 1.4rem;
  font-weight: 700;
  font-family: "inter", sans-serif;
  cursor: pointer;
  line-height: 1em;
  margin-right: .4rem;
  color: black;
  display: flex;
  align-items: center;
  gap: 6px;
}

.rb-label-icon {
    width: 20px; height: 20px;
    border-radius: 50%;
    background: #D83933;
    display: flex; 
    align-items: center; 
    justify-content: center;
    flex-shrink: 0;
    transition: background 0.2s;
  }

.rb:hover .rb-label-icon { background: #B50909; }
  .rb-label-icon svg {
    width: 10px; height: 10px;
    color: var(--white);
  }

@media (max-width: 480px) {
  .fn {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .fn-heading { font-size: 1.6rem; }
  .rb { font-size: 0.9rem; padding: 4px 10px; }
}

.my-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 160px);
  gap: 20px;
  width: 100%;
  box-sizing: border-box;
}

.cell {
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: #fff;
  box-sizing: border-box;
  overflow: hidden;
  }

.cell-a { background-image: url(./img/grid-1.png); background-size: cover; grid-column: 1 / 3; grid-row: 1 / 3; }
.cell-b { background-image: url(./img/grid-2.jpg); background-size: cover; grid-column: 3 / 4; grid-row: 1 / 3; }
.cell-c { background-image: url(./img/grid-3.jpg); background-size: cover; grid-column: 4 / 5; grid-row: 1 / 2; }
.cell-d { background-image: url(./img/grid-4.jpeg); background-size: cover; grid-column: 4 / 5; grid-row: 2 / 3; }

.cell-top {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cell-icon {
  width: 18px;
  height: 18px;
  color: white;
  fill: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 500;
  flex-shrink: 0;
}
.cell-top-text {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2rem;
  opacity: 0.85;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: uppercase;
}

.cell-bottom { display: flex; flex-direction: column; gap: 3px; }
.cell-label {
  font-size: 11px;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.cell-value {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
}

@media (max-width: 1024px) {
  .my-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(4, 120px);
  }
  .cell-a { grid-column: 1 / 3; grid-row: 1 / 3; }
  .cell-b { grid-column: 1 / 2; grid-row: 3 / 5; }
  .cell-c { grid-column: 2 / 3; grid-row: 3 / 4; }
  .cell-d { grid-column: 2 / 3; grid-row: 4 / 5; }
}

@media (max-width: 640px) {
  .my-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(6, 100px);
  }
  .cell-a { grid-column: 1 / 2; grid-row: 1 / 3; }
  .cell-b { grid-column: 1 / 2; grid-row: 3 / 5; }
  .cell-c { grid-column: 1 / 2; grid-row: 5 / 6; }
  .cell-d { grid-column: 1 / 2; grid-row: 6 / 7; }
}