html, body{ margin:0; padding:0; }
    body{
      background-color:#0ea5e9; /* matches your app background */
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
      Roboto, Helvetica, Arial, sans-serif;
      color:#e5e7eb;
    }

    /* ===== Navbar (same vibe as your app) ===== */
    .topbar{
      position: sticky;
      top: 0;
      z-index: 99999;
      padding: 14px 0;
      background: rgba(2, 6, 23, 0.28);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(148,163,184,0.14);
    }
    .topbar-inner{
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 22px;
      display: flex;
      align-items: center;
      justify-content: center; /* centered like your screenshot */
      gap: 14px;
    }
    .brand-logo {
    height: 28px;
    width: auto;
    border-radius: 6px;
    }
    .brand{
      display: inline-flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: #fff;
    }
    .brand-mark{
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      background: rgba(56,189,248,0.14);
      border: 1px solid rgba(56,189,248,0.22);
      box-shadow: 0 16px 34px rgba(56,189,248,0.10);
      font-weight: 900;
    }
    .brand-text{
      font-weight: 900;
      letter-spacing: 0.06em;
      font-size: 1.45rem;
      text-transform: uppercase;
    }

    .brand-text .tm{
    font-size: 0.55em;
    vertical-align: super;
    margin-left: 2px;
    font-weight: 600;
    opacity: 0.85;
    }

    /* ===== Hero ===== */
    .hero{
      position: relative;
      min-height: calc(100vh - 64px);
      overflow: hidden;
      display: grid;
      place-items: center;
    }

    .hero-inner{
      width: min(1200px, 92vw);
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      align-items: center;
      gap: 40px;
      padding: 70px 0;
      z-index: 9999;
    }

    .hero-copy h1{
      margin: 0 0 18px;
      font-size: 4.4rem;
      line-height: 0.95;
      font-weight: 1000;
      letter-spacing: -0.02em;
      color: #fff;
      text-shadow: 0 12px 40px rgba(0,0,0,0.18);
    }

    .hero-copy .cta{
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 14px 18px;
        border-radius: 14px;
        font-weight: 900;
        text-decoration: none;
        color: #020617;
        background: #fff;
        width: 200px;
        box-shadow: 0 10px 26px rgba(56,189,248,0.35);
        transition: transform .15s ease, box-shadow .15s ease, opacity .15s ease;
    }

    .hero-copy .cta:hover{
      transform: translateY(-2px);
      border-color: rgba(56,189,248,0.35);
      box-shadow: 0 26px 60px rgba(0,0,0,0.20);
    }

    /* Right-side contrail image */
    .hero-art{
      position: relative;
      min-height: 420px;
    }

    .contrail-img{
      position: absolute;
      right: -80px;
      top: -80px;
      width: min(820px, 70vw);
      max-width: 980px;
      transform: rotate(-12deg);
      opacity: 0.95;
      filter: drop-shadow(0 40px 80px rgba(0,0,0,0.20));
      pointer-events: none;
      user-select: none;
    }

    /* subtle dark vignette like your screenshot edges */
    .hero:after{
      content:"";
      position:absolute;
      inset:-60px;
      background:
        radial-gradient(1200px 700px at 20% 40%, rgba(0,0,0,0.0), rgba(0,0,0,0.18)),
        radial-gradient(900px 600px at 90% 30%, rgba(0,0,0,0.0), rgba(0,0,0,0.16));
      pointer-events:none;
    }

    /* ===== Spreaded Contrail ===== */
.contrail-spread {
  position: absolute;
  right: -120px;
  top: 20%;
  width: 900px;
  height: 120px;

  transform: rotate(-18deg);

  pointer-events: none;
  z-index: 0;
}

/* Core contrail body */
.contrail-spread::before {
  content: "";
  position: absolute;
  inset: 0;

  background: linear-gradient(
    to right,
    rgba(255,255,255,0.95),
    rgba(255,255,255,0.85),
    rgba(255,255,255,0.6),
    rgba(255,255,255,0.3),
    rgba(255,255,255,0.1)
  );

  border-radius: 80px;
  filter: blur(6px);
}

/* Spreaded diffusion */
.contrail-spread::after {
  content: "";
  position: absolute;
  inset: -30px;

  background: radial-gradient(
    ellipse at center,
    rgba(255,255,255,0.45),
    rgba(255,255,255,0.2),
    rgba(255,255,255,0.05),
    transparent 70%
  );

  border-radius: 100px;
  filter: blur(20px);
}
/* ===== Second Spreaded Contrail (Left Slanted) ===== */
.contrail-spread-left {
  position: absolute;
  left: -20%;
  top: 55%;
  width: 1200px;
  height: 120px;

  transform: rotate(16deg); /* opposite slant */
  pointer-events: none;
  z-index: 0;
}

/* Core contrail body */
.contrail-spread-left::before {
  content: "";
  position: absolute;
  inset: 0;

  background: linear-gradient(
    to right,
    rgba(255,255,255,0.95),
    rgba(255,255,255,0.85),
    rgba(255,255,255,0.6),
    rgba(255,255,255,0.3),
    rgba(255,255,255,0.1)
  );

  border-radius: 80px;
  filter: blur(6px);
}

/* Spreaded diffusion */
.contrail-spread-left::after {
  content: "";
  position: absolute;
  inset: -30px;

  background: radial-gradient(
    ellipse at center,
    rgba(255,255,255,0.45),
    rgba(255,255,255,0.2),
    rgba(255,255,255,0.05),
    transparent 70%
  );

  border-radius: 100px;
  filter: blur(20px);
}

/* ===== Learn Explainer Section ===== */

.learn-explainer {
  padding: 100px 40px;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.15),
    rgba(0,0,0,0.25)
  );
}

.learn-container {
  max-width: 1100px;
  margin: 0 auto;
}

.learn-explainer h2 {
  font-size: 42px;
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.learn-subtext {
  font-size: 18px;
  opacity: 0.85;
  max-width: 750px;
  line-height: 1.6;
  margin-bottom: 60px;
  color: #000;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.learn-card {
  background: #000;
  backdrop-filter: blur(12px);
  padding: 30px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.3s ease;
}

.learn-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,255,255,0.18);
}

.learn-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.learn-card p {
  font-size: 15px;
  opacity: 0.8;
  line-height: 1.6;
}


/* ===== About Section ===== */
.about-section{
  padding: 100px 40px;
  background: #fff;
}

.about-section h2{
  font-size: 42px;
  margin-bottom: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #000;
}




    /* Mobile */
    @media (max-width: 900px){
      .hero-inner{
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 56px 0 90px;
      }
      .hero-art{ min-height: 320px; }
      .contrail-img{
        right: -40px;
        top: -40px;
        width: min(880px, 95vw);
        transform: rotate(-10deg);
      }
      .topbar-inner{ justify-content: flex-start; }
    }



/* ===== Footer (old layout + no overflow) ===== */
.site-footer{
  width: 100%;
  max-width: 100vw;
  box-sizing: border-box;
  overflow-x: hidden;

  /* keep it consistent with your site */
  background: #070F22;
  border-top: 1px solid rgba(148, 163, 184, 0.14);
  padding: 18px 0;
}

.footer-inner{
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
  box-sizing: border-box;

  /* ✅ restores the old layout */
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap; /* ✅ prevents overflow */
}

.footer-left{
  color: rgba(226,232,240,0.65);
  font-size: 13px;
}

.footer-links{
  display: flex;         /* ✅ required */
  gap: 18px;
  flex-wrap: wrap;       /* ✅ prevents overflow */
  row-gap: 10px;
}

.footer-links a{
  font-size: 13px;
  color: rgba(226,232,240,0.75);
  text-decoration: none;
  white-space: nowrap;   /* keeps each link on one line */
  max-width: 100%;
  transition: color 0.2s ease;
}

.footer-links a:hover{
  color: #38bdf8;
}

/* Mobile: stack cleanly */
@media (max-width: 640px){
  .site-footer{ padding-left: 14px; padding-right: 14px; }

  .footer-inner{
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .footer-links{
    justify-content: center;
  }

  /* Avoid the fixed version label colliding with the footer on small screens */
  .bottom-nav{
    position: static !important;
    margin: 10px 0 0 !important;
    justify-content: center !important;
  }
}
@media (min-width: 920px){
    .site-footer{
        background: transparent;
    }
    .footer-links a:hover {
        color: #000;
    }
}