@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap");

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: var(--lh);
  color: var(--text);
  background:
    radial-gradient(1050px 360px at 0% -20%, color-mix(in srgb, var(--accent-soft), transparent 20%), transparent 72%),
    radial-gradient(850px 320px at 100% 0%, color-mix(in srgb, #f59e0b, transparent 88%), transparent 68%),
    var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border);
  background: var(--topbar-bg);
  backdrop-filter: blur(10px);
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand {
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: var(--space-2);
}

.nav-link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--muted);
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-2);
  text-decoration: none;
}

.page-shell {
  max-width: 1500px;
  margin: 0 auto;
  padding: var(--space-5);
}

.stack {
  display: grid;
  gap: var(--space-3);
}

.stack-lg {
  display: grid;
  gap: var(--space-5);
}

.auth-wrap {
  min-height: calc(100vh - 130px);
  display: grid;
  place-items: center;
}

.auth-card {
  width: min(100%, 430px);
}

.auth-title {
  margin: 0 0 var(--space-2);
}

.auth-subtitle {
  margin: 0 0 var(--space-4);
  color: var(--muted);
}

@media (max-width: 900px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-left,
  .topbar-right {
    justify-content: space-between;
  }

  .page-shell {
    padding: var(--space-4);
  }
}