*, *::before, *::after { box-sizing: border-box; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 64px;
    }
    html, body {
      margin: 0;
      padding: 0;
      background: #1a1a1a;
      color: #e8eaf0;
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      font-size: 16px;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; height: auto; }

    .btn {
      display: inline-block;
      background: #3b89b6;
      color: #ffffff;
      border: none;
      border-radius: 6px;
      font-family: inherit;
      font-size: 1rem;
      font-weight: 600;
      padding: 12px 24px;
      cursor: pointer;
      transition: background-color 160ms ease;
    }
    .btn:hover { background: #4a9bc9; }
    .hero .btn {
      font-size: 1.2rem;
      padding: 16px 36px;
    }

    /* Nav */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 80px;
      background: #1a1a1a;
      border-bottom: 1px solid #3a3a3a;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      margin: 0 auto;
      padding: 0 40px;
      height: 80px;
    }
    .nav-left {
      display: flex;
      align-items: center;
    }
    .nav-right {
      display: flex;
      justify-content: flex-end;
      align-items: center;
    }
    .nav-logo img {
      width: 200px;
      height: auto;
      filter: brightness(0) invert(1);
    }
    .nav-links {
      display: flex;
      gap: 40px;
      align-items: center;
      margin-left: 96px;
    }
    .nav-links a {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 400;
      letter-spacing: -0.01em;
      text-transform: none;
      text-decoration: none;
      transition: color 160ms ease;
    }
    .nav-links a:hover { color: #3b89b6; }

    /* Hero */
    .hero {
      position: relative;
      height: 100vh;
      display: flex;
      align-items: center;
      background: #1a1a1a;
      background-image: url('earth-night.jpg');
      background-size: cover;
      background-position: center center;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(10,13,20,0.55);
      z-index: 0;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      opacity: 0.10;
      z-index: 1;
      pointer-events: none;
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      max-width: 960px;
      width: 100%;
      margin: 0 auto;
      padding: 0 40px;
    }
    .hero-inner::before {
      content: '';
      position: absolute;
      inset: -80px -120px;
      background: radial-gradient(ellipse at center, rgba(10,13,20,0.75) 0%, rgba(10,13,20,0.5) 40%, transparent 75%);
      z-index: -1;
      pointer-events: none;
    }
    .hero-declaration {
      font-size: clamp(32px, 4vw, 56px);
      font-weight: 800;
      letter-spacing: 0.15em;
      color: #e8eaf0;
      text-transform: uppercase;
      margin-bottom: 24px;
      line-height: 1.1;
      text-shadow: 0 0 60px rgba(10,13,20,0.9), 0 0 120px rgba(10,13,20,0.7), 0 0 200px rgba(10,13,20,0.5);
    }
    .hero h1 {
      font-size: clamp(17px, 1.6vw, 22px);
      font-weight: 400;
      line-height: 1.75;
      letter-spacing: 0.01em;
      margin: 0 0 24px;
      color: #dde1e7;
      max-width: 640px;
      text-shadow: 0 0 60px rgba(10,13,20,0.9), 0 0 120px rgba(10,13,20,0.7), 0 0 200px rgba(10,13,20,0.5);
    }
    .hero p {
      font-size: clamp(17px, 1.8vw, 21px);
      line-height: 1.6;
      color: #e8eaf0;
      max-width: 680px;
      margin: 0 0 40px;
    }

    /* Shared section headings */
    .problem h2, .what h2, .who h2, .capture h2 {
      font-size: clamp(28px, 4vw, 56px);
      font-weight: 800;
      color: #e8eaf0;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      line-height: 1.1;
      margin: 0 0 40px;
    }

    /* Problem */
    .problem {
      padding: 96px 0 160px;
      background-image: linear-gradient(to right, rgba(15,18,26,0.7) 0%, rgba(15,18,26,0.3) 60%, rgba(15,18,26,0.0) 100%), url('getty-images-eA3YEvdIwg0-unsplash.jpg');
      background-size: cover;
      background-position: center center;
      position: relative;
    }
    .problem-inner {
      position: relative;
      z-index: 1;
      max-width: 740px;
      margin-left: calc(8% + 25px);
      margin-right: auto;
      padding: 0 40px 80px;
    }
    .problem p {
      color: #ffffff;
      font-size: clamp(17px, 1.6vw, 22px);
      font-weight: 400;
      line-height: 1.75;
      margin: 0 0 28px;
    }
    .problem p:last-child { margin-bottom: 0; }

    /* What Qubrium Is */
    .what {
      padding: 96px 0;
      border-top: 1px solid #3a3a3a;
      background-image: linear-gradient(to left, rgba(15,18,26,0.85) 0%, rgba(15,18,26,0.75) 40%, rgba(15,18,26,0.1) 100%), url('infrastructure_map.png');
      background-size: cover;
      background-position: center center;
      position: relative;
    }
    .what-inner {
      max-width: 740px;
      margin-left: auto;
      margin-right: calc(8% + 25px);
      padding: 0 40px 80px;
      padding-left: 56px;
      position: relative;
      z-index: 1;
      text-align: right;
    }
    .what-inner p {
      padding-left: 0;
      text-align: right;
    }
    .what p {
      color: #ffffff;
      font-size: clamp(17px, 1.6vw, 22px);
      font-weight: 400;
      line-height: 1.75;
      margin: 0 0 24px;
    }
    .what p:last-child { margin-bottom: 0; }

    /* Who It's For */
    .who {
      padding: 96px 0;
      border-top: 1px solid #3a3a3a;
      background-image: linear-gradient(to right, rgba(15,18,26,0.5) 0%, rgba(15,18,26,0.3) 50%, rgba(15,18,26,0.0) 100%), url('getty-images-62ihu7A90_0-unsplash.jpg');
      background-size: cover;
      background-position: center center;
      position: relative;
    }
    .who-inner {
      max-width: 1300px;
      margin-left: calc(8% + 25px);
      margin-right: auto;
      padding: 0 48px 96px;
      position: relative;
      z-index: 1;
      text-align: left;
    }
    .who h2 {
      text-align: left;
    }
    .tiles {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .tile {
      border: 1px solid rgba(255,255,255,0.2);
      padding: 32px;
      background: rgba(15,18,26,0.78);
      backdrop-filter: blur(4px);
      border-radius: 8px;
    }
    .tile-label {
      color: #3b89b6;
      font-size: 1.5rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 16px;
    }
    .tile-body {
      color: #ffffff;
      font-size: clamp(17px, 1.6vw, 22px);
      font-weight: 400;
      line-height: 1.75;
    }
    .who-inner .btn {
      font-size: 1.2rem;
      padding: 16px 36px;
    }

    /* Email capture */
    .capture {
      padding: 96px 0;
      text-align: center;
      border-top: 1px solid #3a3a3a;
    }
    .capture-inner {
      max-width: 600px;
      margin: 0 auto;
      padding: 0 40px;
    }
    .capture-inner > p {
      color: #ffffff;
      font-size: clamp(17px, 1.6vw, 22px);
      font-weight: 400;
      line-height: 1.75;
      margin: 0 0 40px;
    }
    .capture form {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .capture input[type="email"] {
      flex: 1;
      min-width: 240px;
      padding: 12px 16px;
      background: #111;
      border: 1px solid #3a3a3a;
      color: #e8eaf0;
      font-family: inherit;
      font-size: 1rem;
      border-radius: 6px;
      outline: none;
      transition: border-color 160ms ease;
    }
    .capture input[type="email"]::placeholder { color: #e8eaf0; }
    .capture input[type="email"]:focus { border-color: #3b89b6; }
    .capture .success {
      color: #3b89b6;
      font-weight: 600;
      margin: 0;
    }
    .capture .error {
      color: #e05a5a;
      margin: 16px 0 0;
    }

    .capture-social {
      display: flex;
      gap: 24px;
      justify-content: center;
      margin-top: 32px;
    }

    .social-link {
      color: #e8eaf0;
      font-size: 1.6rem;
      font-weight: 600;
      text-decoration: none;
      width: 54px;
      height: 54px;
      border: 1px solid #3a3a3a;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .social-link:hover {
      color: #3b89b6;
      border-color: #3b89b6;
    }

    /* Modal */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.75);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
    }

    .modal-box {
      background: #f0f2f5;
      border: 2px solid #3b89b6;
      border-radius: 8px;
      padding: 48px;
      max-width: 560px;
      width: 100%;
      position: relative;
    }

    .modal-box h2 {
      font-size: 1.8rem;
      font-weight: 800;
      color: #1a1a1a;
      margin: 0 0 12px;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .modal-box p {
      color: #444;
      margin: 0 0 32px;
      font-size: 1rem;
    }

    .modal-close {
      position: absolute;
      top: 16px;
      right: 20px;
      background: none;
      border: none;
      color: #444;
      font-size: 1.8rem;
      cursor: pointer;
      line-height: 1;
    }

    .modal-close:hover { color: #1a1a1a; }

    .modal-box input,
    .modal-box textarea {
      width: 100%;
      background: #ffffff;
      border: 1px solid #ccd0d8;
      color: #1a1a1a;
      font-size: 1rem;
      padding: 12px 16px;
      border-radius: 6px;
      margin-bottom: 16px;
      font-family: inherit;
      box-sizing: border-box;
    }

    .modal-box textarea {
      resize: vertical;
    }

    .modal-box input:focus,
    .modal-box textarea:focus {
      outline: none;
      border-color: #3b89b6;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-status {
      margin-top: 16px;
      font-size: 1rem;
      text-align: center;
    }

    /* Footer */
    footer {
      border-top: 1px solid #3a3a3a;
      padding: 32px 48px;
      background: #1a1a1a;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      width: 100%;
    }

    .footer-left {
      color: #e8eaf0;
      font-size: 1.3rem;
      font-weight: 400;
      letter-spacing: -0.01em;
    }

    .footer-left a {
      color: #e8eaf0;
      font-size: 1.3rem;
      font-weight: 400;
      letter-spacing: -0.01em;
      text-decoration: none;
      margin-left: 16px;
    }

    .footer-left a:hover {
      color: #3b89b6;
    }

    .footer-right {
      display: flex;
      align-items: center;
      gap: 20px;
      color: #e8eaf0;
      font-size: 1.3rem;
      font-weight: 400;
      letter-spacing: -0.01em;
    }

    .footer-right a {
      color: #e8eaf0;
      font-size: 1.3rem;
      font-weight: 400;
      letter-spacing: -0.01em;
      text-decoration: none;
    }

    .footer-right a:hover {
      color: #3b89b6;
    }

    /* Mobile */
    @media (max-width: 720px) {
      .nav-inner { padding: 0 20px; }
      .nav-logo img { width: 160px; }
      .hero-inner { padding: 0 20px; }
      .problem-inner,
      .what-inner,
      .who-inner,
      .capture-inner { padding-left: 20px; padding-right: 20px; }
      .nav-links { display: none; }
      .site-footer { padding-left: 20px; padding-right: 20px; }
      .tiles { grid-template-columns: 1fr; }
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      margin-left: auto;
    }
    .hamburger span {
      display: block;
      width: 28px;
      height: 2px;
      background: #e8eaf0;
    }
    #mobile-menu {
      display: none;
      position: fixed;
      inset: 0;
      background: #ffffff;
      z-index: 999;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
      gap: 32px;
      padding: 60px 40px;
    }
    #mobile-menu.open {
      display: flex;
    }
    #mobile-menu a {
      color: #1a1a1a;
      font-size: 2rem;
      font-weight: 700;
      text-decoration: none;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      display: block;
      width: 100%;
    }
    #mobile-menu a:hover { color: #3b89b6; }
    #mobile-menu .btn {
      background: #3b89b6;
      color: #ffffff;
      margin-top: 16px;
      width: 100%;
      text-align: center;
    }
    .mobile-menu-close {
      position: absolute;
      top: 24px;
      right: 28px;
      background: none;
      border: none;
      color: #1a1a1a;
      font-size: 2.5rem;
      cursor: pointer;
      line-height: 1;
    }

    @media (max-width: 768px) {
      .hamburger { display: flex; }
      .nav-links { display: none; }
      .nav-right { display: none; }

      .hero {
        background-position: 60% center;
      }
      .problem {
        background-position: center center;
      }
      .what {
        background-position: 80% center;
      }
      .who {
        background-position: 30% center;
      }

      footer {
        padding: 24px 20px;
      }
      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
      .footer-left {
        display: flex;
        flex-direction: column;
        gap: 8px;
        font-size: 0.8rem;
      }
      .footer-right {
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.8rem;
      }

      .problem-inner, .what-inner, .capture-inner {
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 0 24px 60px !important;
        max-width: 100% !important;
      }
      .who-inner {
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 0 16px 60px !important;
        max-width: 100% !important;
      }
      .what-inner {
        text-align: left !important;
      }
      .what-inner p {
        text-align: left !important;
      }
      .who h2 {
        text-align: left;
      }

      /* SpaceX-style mobile layout: photo on top, text below */
      .problem, .what, .who {
        background-attachment: scroll;
        display: flex;
        flex-direction: column;
      }

      .problem::before,
      .what::before,
      .who::before {
        content: '';
        display: block;
        width: 100%;
        height: 280px;
        background-size: cover;
        background-position: center center;
        flex-shrink: 0;
      }

      .problem::before {
        background-image: url('getty-images-eA3YEvdIwg0-unsplash.jpg');
        background-position: center 40%;
      }

      .what::before {
        background-image: url('infrastructure_map.png');
        background-position: center center;
      }

      .who::before {
        background-image: url('getty-images-62ihu7A90_0-unsplash.jpg');
        background-position: center 40%;
      }

      .problem,
      .what,
      .who {
        background-image: none !important;
      }

      .problem-inner,
      .what-inner,
      .who-inner {
        background: linear-gradient(to bottom, rgba(26,26,26,0) 0%, rgba(26,26,26,1) 60px);
        margin-top: -60px;
        position: relative;
        z-index: 1;
        padding-top: 40px !important;
      }

      .problem, .what, .who {
        padding-bottom: 0;
      }
      .problem-inner,
      .what-inner,
      .who-inner {
        padding-bottom: 40px !important;
      }

      section {
        padding-top: 0 !important;
        padding-bottom: 0 !important;
        margin-top: 0 !important;
        margin-bottom: 0 !important;
      }
      .capture {
        padding-top: 48px !important;
        padding-bottom: 48px !important;
      }

      footer {
        padding: 24px 20px;
      }
      .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .footer-left {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        font-size: 1rem;
      }
      .footer-left a {
        display: block;
        font-size: 1rem;
        margin-left: 0;
      }
      .footer-right {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        font-size: 1rem;
      }
      .footer-right a {
        font-size: 1rem;
      }
    }

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

    .careers {
      padding: 96px 0;
      border-top: 1px solid #3a3a3a;
      background: #1a1a1a;
      background-image: url('tasha-kostyuk-TtMKq3lJm-U-unsplash.jpg');
      background-size: cover;
      background-position: center top;
      background-attachment: scroll;
      position: relative;
    }

    .careers::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to right, rgba(15,18,26,0.92) 0%, rgba(15,18,26,0.85) 50%, rgba(15,18,26,0.6) 100%);
      z-index: 0;
    }

    .careers-inner {
      max-width: 800px;
      margin: 0 auto;
      padding: 0 48px 48px;
      position: relative;
      z-index: 1;
    }

    .careers h2 {
      font-size: clamp(28px, 4vw, 56px);
      font-weight: 800;
      color: #e8eaf0;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      line-height: 1.1;
      margin: 0 0 40px;
    }

    .careers h3 {
      font-size: 1.5rem;
      font-weight: 800;
      color: #3b89b6;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin: 40px 0 16px;
    }

    .careers p {
      color: #dde1e7;
      font-size: 1.1rem;
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .careers-tagline {
      color: #e8eaf0;
      font-size: 1.2rem;
      font-style: italic;
      font-weight: 400;
      margin: 40px 0 0;
      letter-spacing: 0.02em;
    }

    .careers .btn {
      margin-top: 32px;
      font-size: 1.2rem;
      padding: 16px 36px;
    }

    .file-upload-area {
      margin-bottom: 16px;
    }

    .file-upload-area label {
      display: block;
      color: #8892a4;
      font-size: 0.9rem;
      margin-bottom: 8px;
    }

    .file-upload-area input[type="file"] {
      width: 100%;
      background: #111;
      border: 1px solid #3a3a3a;
      color: #e8eaf0;
      font-size: 0.9rem;
      padding: 10px 16px;
      border-radius: 6px;
      font-family: inherit;
      box-sizing: border-box;
    }

    .drop-target {
      border: 2px dashed #3b89b6;
      border-radius: 8px;
      padding: 24px 16px;
      text-align: center;
      cursor: pointer;
      transition: border-color 0.2s, background 0.2s;
      position: relative;
      background: #e8f4fb;
      margin-bottom: 16px;
    }
    .drop-target.drag-over {
      border-color: #3b89b6;
      background: rgba(59,137,182,0.08);
    }
    .drop-target.has-file {
      border-color: #3b89b6;
    }
    .drop-hint {
      color: #2d6a8a;
      font-size: 0.95rem;
      margin: 0 0 4px;
    }
    .drop-browse {
      color: #3b89b6;
      text-decoration: underline;
      cursor: pointer;
    }
    .drop-accepted {
      color: #4a7a94;
      font-size: 0.8rem;
      margin: 0;
    }
    .drop-filename {
      color: #3b89b6;
      font-size: 0.9rem;
      margin: 8px 0 0;
      font-weight: 600;
    }
    #ca-resume {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
      width: 100%;
      height: 100%;
    }

    @media (max-width: 768px) {
      .careers-inner {
        padding: 0 24px 48px;
      }
      .careers {
        background-image: none !important;
        padding-top: 0;
      }
      .careers::before {
        display: none;
      }
      .careers::after {
        content: '';
        display: block;
        width: 100%;
        height: 280px;
        background-image: url('tasha-kostyuk-TtMKq3lJm-U-unsplash.jpg');
        background-size: cover;
        background-position: center 30%;
        order: -1;
      }
      .careers {
        display: flex;
        flex-direction: column;
      }
      .careers-inner {
        background: linear-gradient(to bottom, rgba(26,26,26,0) 0%, rgba(26,26,26,1) 60px);
        margin-top: -60px;
        padding-top: 40px !important;
        z-index: 1;
      }
    }
  


/* ============================================================
   STANDALONE SUBPAGES (/privacy, /contact) — crawlable routes
   ============================================================ */
.subpage-wrap { max-width: 780px; margin: 0 auto; padding: 128px 24px 80px; }
.subpage-card { background: #f0f2f5; border: 2px solid #3b89b6; border-radius: 8px; padding: 48px; color: #1a1a1a; }
.subpage-card h1, .subpage-card > h2:first-of-type { font-size: 1.8rem; font-weight: 800; color: #1a1a1a; margin: 0 0 16px; letter-spacing: 0.05em; text-transform: uppercase; }
.subpage-card h2 { font-size: 1.4rem; font-weight: 800; color: #1a1a1a; margin: 8px 0 12px; }
.subpage-card p { line-height: 1.7; margin: 0 0 16px; color: #1a1a1a; }
.subpage-card a { color: #3b89b6; }
.subpage-card .entity-block { line-height: 1.8; margin: 8px 0 28px; }
.subpage-card .entity-block .org-name { font-weight: 700; }
.subpage-card form input, .subpage-card form textarea { width: 100%; padding: 12px 14px; margin-bottom: 14px; border: 1px solid #c3cad6; border-radius: 6px; font-family: inherit; font-size: 1rem; background: #fff; color: #1a1a1a; }
.subpage-card .form-row { display: flex; gap: 14px; }
.subpage-card .form-row > * { flex: 1; }
.subpage-card .form-status { margin-top: 14px; color: #1a4a66; font-weight: 600; }
@media (max-width: 640px) { .subpage-wrap { padding: 100px 16px 60px; } .subpage-card { padding: 28px; } .subpage-card .form-row { flex-direction: column; gap: 0; } }

/* Plain-HTML organizational attribution in footer */
.footer-org { text-align: center; color: #8892a4; font-size: 0.85rem; padding: 18px 24px 0; line-height: 1.6; }
.footer-org .org-name { font-weight: 700; color: #b8c0cc; }