:root {
  --color-brand-ink: #0F172A;
  --color-brand-blue: #2563EB;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8FAFC;
  --color-text-muted: #475569;
  --color-border: #E2E8F0;
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-system);
  background-color: var(--color-bg);
  color: var(--color-brand-ink);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  line-height: 1.5;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(37, 99, 235, 0.04) 0%, transparent 70%),
    radial-gradient(ellipse 90% 60% at 50% 100%, var(--color-bg-soft) 0%, transparent 80%);
  background-repeat: no-repeat;
  color: var(--color-brand-ink);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  padding: clamp(1rem, 2.5vh, 2rem) clamp(1.25rem, 4vw, 2.5rem);
  padding-top: max(clamp(1rem, 2.5vh, 2rem), env(safe-area-inset-top));
  padding-bottom: max(clamp(1rem, 2.5vh, 2rem), env(safe-area-inset-bottom));
  padding-left: max(clamp(1.25rem, 4vw, 2.5rem), env(safe-area-inset-left));
  padding-right: max(clamp(1.25rem, 4vw, 2.5rem), env(safe-area-inset-right));
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.site-header {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  margin-bottom: clamp(1.75rem, 3vw, 2.5rem);
  flex-shrink: 0;
}

.wordmark {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--color-brand-ink);
  text-transform: uppercase;
}

.hero-wordmark {
  font-size: clamp(2rem, 4.75vw, 3.375rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-brand-ink);
  line-height: 1.05;
  text-align: center;
}

.main-content {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: auto;
  text-align: center;
  flex-shrink: 0;
}

.hero-panel {
  max-width: 640px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: 9999px;
  background-color: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-brand-blue);
  text-transform: uppercase;
  margin-bottom: clamp(1rem, 2vh, 1.25rem);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-brand-blue);
  flex-shrink: 0;
}

.primary-heading {
  font-size: clamp(1.875rem, 4.5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-brand-ink);
  margin-bottom: clamp(0.75rem, 1.5vh, 1rem);
}

.supporting-message {
  font-size: clamp(1.0625rem, 2.2vw, 1.25rem);
  line-height: 1.5;
  color: var(--color-brand-ink);
  margin-bottom: 0.375rem;
}

.secondary-line {
  font-size: clamp(0.9375rem, 1.8vw, 1.0625rem);
  line-height: 1.5;
  color: var(--color-text-muted);
}

.site-footer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 1rem;
  padding-bottom: 0.25rem;
  flex-shrink: 0;
}

.copyright {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* 404 Specific Styling */
.error-wordmark {
  font-size: clamp(1.875rem, 1.66rem + 1.07vw, 2.625rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-brand-ink);
  line-height: 1.1;
  text-align: center;
}

.error-code {
  font-size: clamp(3.75rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-brand-blue);
  margin-bottom: clamp(0.75rem, 2vh, 1rem);
  user-select: none;
}

.error-heading {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-brand-ink);
  margin-bottom: clamp(0.75rem, 1.5vh, 1rem);
}

.error-message {
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.55;
  color: var(--color-text-muted);
  max-width: 26rem;
  margin-bottom: clamp(1.5rem, 3vh, 2rem);
}

.return-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0;
  padding: 0.75rem 1.625rem;
  min-height: 44px;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #FFFFFF;
  background-color: var(--color-brand-blue);
  border: 1px solid var(--color-brand-blue);
  border-radius: 6px;
  text-decoration: none;
  transition: none;
}

.return-link:hover {
  background-color: var(--color-brand-ink);
  border-color: var(--color-brand-ink);
  color: #FFFFFF;
}

.return-link:active {
  background-color: var(--color-brand-ink);
  border-color: var(--color-brand-blue);
  color: var(--color-bg-soft);
}

.return-link:focus-visible {
  outline: 2px solid var(--color-brand-blue);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}