@font-face {
  font-family: "Rail Alphabet 3";
  src: url("/assets/fonts/RailAlphabet3Web-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Rail Alphabet 3";
  src: url("/assets/fonts/RailAlphabet3Web-Medium.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Rail Alphabet 3";
  src: url("/assets/fonts/RailAlphabet3Web-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --color-brand-dark-blue: #050f2e;
  --color-panel: rgb(0 8 31 / 0.6);
  --color-text-primary: #ffffff;
  --color-text-secondary: #e7e9f3;
  --color-button-top: #3458e6;
  --color-button-bottom: #2d46a9;
  --color-focus: #ffffff;

  --font-family: "Rail Alphabet 3", "Helvetica Neue", Arial, system-ui, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background-color: var(--color-brand-dark-blue);
  color: var(--color-text-primary);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
}

/* Full-bleed photo, dimmed to 40% over the brand dark blue */
.background {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  pointer-events: none;
  z-index: -1;
}

/* ---------- Masthead ---------- */

.masthead {
  display: flex;
  justify-content: center;
  padding-block: 16px;
  margin-top: 12px; /* logo sits 52px from the top on mobile: 24 body + 12 + 16 */
  margin-bottom: auto;
}

.masthead__logo {
  display: block;
}


/* ---------- Panel ---------- */

.panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: 809px;
  margin-bottom: auto;
  padding: 40px 24px;
  border-radius: 2px;
  background-color: var(--color-panel);
  -webkit-backdrop-filter: blur(2.5px);
  backdrop-filter: blur(2.5px);
  text-align: center;
}

.panel__heading {
  margin: 0;
  font-size: 29px;
  font-weight: 700;
  line-height: 1.23;
  letter-spacing: -0.02em;
}

.panel__body {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.panel__status {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

/* ---------- Button ---------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background-image: linear-gradient(to bottom, var(--color-button-top), var(--color-button-bottom));
  color: var(--color-text-primary);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: filter 150ms ease;
}

.button:hover {
  filter: brightness(1.12);
}

.button:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.button--large {
  padding: 12px 16px;
}

/* ---------- Desktop ---------- */

@media (min-width: 768px) {
  body {
    /* 168px / 120px at the 1440px design width, scaling down on smaller screens */
    padding: clamp(96px, 11.7vw, 168px) clamp(32px, 8.3vw, 120px);
  }

  .masthead {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 16px;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }

  .panel {
    margin-block: auto;
    padding: 52px 60px;
  }

  .panel__heading {
    font-size: 36px;
  }

  .panel__body {
    font-size: 18px;
  }

  .panel__status {
    font-size: 19px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}