:root {
  --rp-blue-950: #04215b;
  --rp-blue-800: #0b4fa8;
  --rp-blue-700: #0f6ec9;
  --rp-cyan-500: #18a9dc;
  --rp-lime-500: #b6e335;
  --rp-white: #f4f9ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--rp-white);
  background:
    radial-gradient(circle at 8% 16%, rgba(182, 227, 53, 0.16), transparent 34%),
    radial-gradient(circle at 90% 8%, rgba(24, 169, 220, 0.22), transparent 36%),
    linear-gradient(160deg, #011437 0%, #04215b 44%, #0b4fa8 100%);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
  padding: 0 18px;
  backdrop-filter: blur(10px);
  background: linear-gradient(90deg, rgba(4, 33, 91, 0.9), rgba(11, 79, 168, 0.68));
  border-bottom: 1px solid rgba(24, 169, 220, 0.35);
}

.brand {
  display: flex;
  align-items: center;
  min-width: 0;
}

.brand-logo {
  display: block;
  height: 44px;
  width: auto;
  max-width: min(58vw, 270px);
  object-fit: contain;
}

.login-btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #05255f;
  background: linear-gradient(120deg, var(--rp-lime-500), #e5f67d);
  box-shadow: 0 10px 26px rgba(182, 227, 53, 0.28);
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.login-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(182, 227, 53, 0.38);
}

.login-btn:active {
  transform: translateY(0);
}

.hero {
  min-height: 100vh;
}

@media (max-width: 640px) {
  .site-header {
    height: 76px;
    padding: 0 12px;
  }

  .brand-logo {
    height: 38px;
  }

  .login-btn {
    padding: 9px 15px;
    font-size: 0.9rem;
  }
}