* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: #99ccff;
  color: #0f172a;
}

.page-shell {
  min-height: 100vh;
  display: grid;
  justify-items: center;
  align-content: start;
  padding: 24px;
}

.page-stack {
  width: 100%;
  display: grid;
  gap: 40px;
  justify-items: center;
}

.panel {
  width: min(90vw, 1200px);
  min-height: 90vh;
  position: relative;
  display: grid;
  grid-template-rows: auto auto 1fr;
  align-items: start;
  padding: 32px;
  border-radius: 32px;
  background: #ffffff;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.16);
}

.login-button {
  position: absolute;
  top: 24px;
  right: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 15px;
  border-radius: 999px;
  background: #1d4ed8;
  color: #eff6ff;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 18px rgba(29, 78, 216, 0.22);
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: -20px;
}

.logo {
  width: clamp(90px, 10.5vw, 135px);
  height: auto;
  display: block;
  flex-shrink: 0;
}

h1,
h2 {
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

.tagline {
  margin: -2px 0 0 0;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.5;
  color: #334155;
}

.copy-grid {
  width: 100%;
  max-width: 820px;
  margin-top: 54px;
  display: grid;
  gap: 18px;
  text-align: left;
}

.copy-grid-lg {
  gap: 24px;
}

.copy-grid p {
  margin: 0;
  color: #334155;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.7;
}

.copy-grid-lg p {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.6;
}

@media (max-width: 720px) {
  .panel {
    min-height: auto;
    padding: 24px;
  }

  .panel-header {
    gap: 14px;
    padding-top: 36px;
  }

  .login-button {
    top: 18px;
    right: 18px;
  }

  .copy-grid,
  .copy-grid-lg {
    margin-top: 36px;
  }
}