:root {
  --bg: #05060836;
  --panel: rgba(11, 18, 32, 0.7);
  --panel-strong: rgba(13, 22, 38, 0.7);
  --line: rgba(180, 206, 255, 0.16);
  --line-strong: rgba(180, 206, 255, 0.28);
  --text: #f6f7f9;
  --muted: rgba(246, 247, 249, 0.76);
  --link: #ffffff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Public Sans", sans-serif;
  background-color: var(--bg);
  min-height: 100vh;
}

.background-stack,
.bg-slide,
.bg-overlay {
  position: fixed;
  inset: 0;
}

.background-stack {
  z-index: -2;
  overflow: hidden;
}

.bg-slide {
  background-size: cover;
  background-position: center;
  opacity: 0;
  will-change: opacity;
}

.bg-one {
  background-image: url("https://www.nasa.gov/wp-content/uploads/2023/06/afrc2016-0073-72jb.jpg");
  animation: fadeCycleOne 30s infinite;
}

.bg-two {
  background-image: url("https://www.nasa.gov/wp-content/uploads/2024/01/p23-171-160.jpg");
  animation: fadeCycleTwo 30s infinite;
}

.bg-three {
  background-image: url("https://upload.wikimedia.org/wikipedia/commons/9/99/NASA%27s_Shuttle_Carrier_Aircraft_905_%28front%29_and_911_%28rear%29.jpg");
  animation: fadeCycleThree 30s infinite;
}

@keyframes fadeCycleOne {
  0%, 30% { opacity: 1; }
  33%, 100% { opacity: 0; }
}

@keyframes fadeCycleTwo {
  0%, 30% { opacity: 0; }
  33%, 63% { opacity: 1; }
  66%, 100% { opacity: 0; }
}

@keyframes fadeCycleThree {
  0%, 63% { opacity: 0; }
  66%, 100% { opacity: 1; }
}

.bg-overlay {
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.22), rgba(0, 0, 0, 0.58)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: auto, 40px 40px, 40px 40px;
}

a {
  color: inherit;
}

.page-shell {
  width: calc(100% - 40px);
  max-width: 1720px;
  margin: 0 auto;
  padding: 20px 0 40px;
}

.site-header,
.site-footer,
.card,
.hero-panel,
.section-heading,
.notice,
.hero > div:first-child {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.site-header,
.site-footer,
.card,
.hero-panel,
.section-heading,
.notice,
input,
select,
textarea,
.metric,
.partner-card,
.nav-button,
.button {
  border-radius: 0;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 18px;
  margin-bottom: 24px;
}

.header-actions,
.logged-out-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}

.brand-mark {
  font: 700 1.7rem/1 "Barlow Condensed", sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-copy,
.lede,
.section-heading p,
.card p,
.site-footer p,
.timestamp,
th,
td,
label,
input,
select,
textarea {
  color: var(--muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.site-nav a,
.button,
.text-link,
.nav-button {
  transition: background-color 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

.site-nav a {
  padding: 11px 14px;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font: 600 0.8rem/1 "Public Sans", sans-serif;
  border: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
  color: var(--text);
}

.auth-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.application-button {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.14);
}

.notice {
  padding: 14px 16px;
  margin-bottom: 20px;
}

main {
  display: grid;
  gap: 20px;
}

.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 20px;
  align-items: stretch;
}

.hero > div:first-child,
.hero-panel {
  min-height: 420px;
}

.hero > div:first-child {
  padding: 34px 30px 30px;
}

.eyebrow {
  margin: 0 0 10px;
  color: rgba(255, 255, 255, 0.82);
  font: 700 0.82rem/1 "Public Sans", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

h1,
h2 {
  font-family: "Barlow Condensed", sans-serif;
  margin: 0 0 12px;
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(3rem, 6vw, 5.6rem);
  max-width: 11ch;
}

h2 {
  font-size: 2rem;
}

.lede,
.section-heading p {
  font-size: 1rem;
  line-height: 1.75;
  max-width: 62ch;
}

.centered-heading {
  text-align: center;
}

.centered-heading p {
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
button.button,
.nav-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  font: 700 0.82rem/1 "Public Sans", sans-serif;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.button:hover,
button.button:hover,
.nav-button:hover,
.text-link:hover {
  background: rgba(255, 255, 255, 0.12);
}

.button-secondary {
  background: transparent;
}

.table-button {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font: 700 0.74rem/1 "Public Sans", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.hero-panel {
  padding: 26px;
  display: grid;
  gap: 16px;
  align-content: center;
  background: var(--panel);
}

.metric {
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.metric-value {
  display: block;
  font: 700 clamp(2.5rem, 4vw, 4rem)/1 "Barlow Condensed", sans-serif;
  letter-spacing: 0.03em;
}

.metric-label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.76rem;
}

.grid.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.grid.three-up {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 22px;
}

.text-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--link);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.84rem;
  font-weight: 700;
}

.section-heading {
  padding: 18px 22px;
  margin-bottom: 18px;
}

.compact-heading {
  padding: 14px 18px;
  margin-bottom: 14px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 14px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

.pirep-form,
.application-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.login-card {
  max-width: 560px;
  margin: min(10vh, 80px) auto 0;
  width: 100%;
  background: var(--panel-strong);
}

.login-form {
  display: grid;
  gap: 16px;
}

.rating-card,
.session-card {
  display: grid;
  gap: 16px;
}

.training-columns {
  align-items: start;
}

.training-column {
  display: grid;
  gap: 18px;
  align-content: start;
}

.conclude-form {
  display: grid;
  gap: 14px;
}

.filter-form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: rgba(0, 0, 0, 0.48);
  padding: 14px 15px;
  font: 500 0.96rem/1.4 "Public Sans", sans-serif;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(0, 0, 0, 0.66);
}

textarea {
  resize: vertical;
}

.full-width,
.full-span {
  grid-column: 1 / -1;
}

.form-error {
  margin: 0 0 18px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.form-success {
  margin: 0 0 18px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.pirep-card,
.application-card {
  display: grid;
  gap: 18px;
}

.pirep-header,
.pirep-grid,
.application-header,
.application-grid {
  display: grid;
  gap: 14px;
}

.pirep-header,
.application-header {
  grid-template-columns: 1fr auto;
  align-items: start;
}

.pirep-grid,
.application-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.session-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: start;
}

.review-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.review-actions form {
  margin: 0;
}

.prose h2 {
  margin-top: 26px;
}

.prose h2:first-child {
  margin-top: 0;
}

.site-footer {
  margin-top: 24px;
  padding: 22px;
}

.partner-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 14px;
}

.partner-card {
  width: 270px;
  height: 96px;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.4);
  padding: 10px;
}

.partner-card img {
  max-width: 100%;
  max-height: 62px;
  object-fit: contain;
}

@media (max-width: 900px) {
  .hero,
  .grid.two-up,
  .grid.three-up,
  .training-columns,
  .pirep-form,
  .application-form,
  .pirep-grid,
  .application-grid,
  .pirep-header,
  .application-header,
  .session-header,
  .site-header {
    grid-template-columns: 1fr;
  }

  .site-header {
    display: grid;
  }

  .header-actions,
  .logged-out-actions {
    justify-content: stretch;
  }

  .auth-badge {
    justify-content: space-between;
  }

  h1 {
    max-width: none;
  }

  .partner-card {
    width: 100%;
  }

  .page-shell {
    width: calc(100% - 24px);
  }
}