.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 11, 24, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(246, 240, 221, 0.08);
}

.site-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  background: var(--grad-aurora);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-300);
}

.site-nav {
  display: flex;
  gap: 1.75rem;
  font-size: 0.9rem;
  font-family: var(--font-display);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--gold-400);
}

.hero {
  padding: 5.5rem 0 4rem;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 60%;
  background: var(--grad-aurora-soft);
  filter: blur(80px);
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  line-height: 1.12;
  margin: 0.9rem 0 1.1rem;
  font-weight: 700;
}

.hero-lede {
  color: var(--cream-200);
  font-size: 1.05rem;
  max-width: 46ch;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-emblem {
  position: relative;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.emblem-ring {
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  border: 1px dashed rgba(255, 202, 44, 0.35);
  animation: spin-slow 40s linear infinite;
}

.emblem-logo {
  width: 78%;
  border-radius: 28px;
  box-shadow: var(--shadow-soft);
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.programs {
  padding: 5rem 0;
  background: linear-gradient(180deg, transparent, rgba(23, 42, 82, 0.35) 40%, transparent);
}

.programs h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin: 0.6rem 0 2.6rem;
  max-width: 32ch;
}

.program-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.4rem;
}

.program-card {
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  border: 1px solid rgba(246, 240, 221, 0.08);
  border-radius: var(--radius-md);
  padding: 1.7rem 1.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.program-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 202, 44, 0.35);
}

.program-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 1rem;
}

.program-card h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  margin-bottom: 0.55rem;
}

.program-card p {
  font-size: 0.9rem;
  color: var(--cream-200);
}

.truth-table-preview {
  padding: 5rem 0;
}

.tt-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.tt-grid h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin: 0.6rem 0 1rem;
}

.tt-grid p {
  color: var(--cream-200);
  margin-bottom: 1.6rem;
  max-width: 48ch;
}

.tt-mini {
  padding: 1.6rem;
}

.mini-truth-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  text-align: center;
}

.mini-truth-table th {
  color: var(--gold-400);
  padding: 0.6rem;
  border-bottom: 1px solid rgba(246, 240, 221, 0.16);
  font-size: 0.85rem;
}

.mini-truth-table td {
  padding: 0.65rem;
  border-bottom: 1px solid rgba(246, 240, 221, 0.06);
  font-size: 0.92rem;
}

.auth-section {
  padding: 3rem 0 6rem;
}

.auth-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.auth-side h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  margin: 0.6rem 0 1rem;
}

.auth-side p {
  color: var(--cream-200);
  max-width: 40ch;
}

.auth-card {
  padding: 1.8rem;
}

.auth-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1.6rem;
  background: rgba(6, 11, 24, 0.5);
  border-radius: 999px;
  padding: 0.3rem;
}

.auth-tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--cream-200);
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
}

.auth-tab.is-active {
  background: var(--grad-aurora);
  color: var(--navy-950);
}

.auth-panel {
  display: none;
}

.auth-panel.is-active {
  display: block;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.auth-row {
  display: flex;
  justify-content: flex-end;
  margin: -0.5rem 0 1.2rem;
}

.link-btn {
  background: none;
  border: none;
  color: var(--blue-300);
  font-size: 0.82rem;
  cursor: pointer;
}

.link-btn:hover {
  color: var(--gold-400);
}

.site-footer {
  border-top: 1px solid rgba(246, 240, 221, 0.08);
  padding: 1.6rem 0;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--cream-200);
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-hint {
  font-family: var(--font-mono);
  color: rgba(246, 240, 221, 0.4);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(6, 11, 24, 0.72);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-backdrop.is-open {
  display: flex;
}

.modal {
  width: min(400px, 90vw);
  padding: 2rem;
  position: relative;
}

.modal h3 {
  font-family: var(--font-display);
  margin: 0.5rem 0 1.4rem;
  font-size: 1.3rem;
}

.modal-hint {
  font-size: 0.76rem;
  color: var(--cream-200);
  margin: -0.4rem 0 1.2rem;
  line-height: 1.4;
}

.modal-hint code {
  font-family: var(--font-mono);
  color: var(--gold-300);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--cream-200);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--gold-400);
}

@media (max-width: 900px) {
  .hero-grid, .auth-grid, .tt-grid {
    grid-template-columns: 1fr;
  }
  .program-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-emblem {
    max-width: 280px;
    margin: 0 auto;
  }
}

@media (max-width: 560px) {
  .program-grid {
    grid-template-columns: 1fr;
  }
  .field-row {
    grid-template-columns: 1fr;
  }
  .site-nav {
    display: none;
  }
}