:root {
  --bg: #090b0e;
  --bg-surface: #11141a;
  --bg-card: #151922;
  --border: #222735;
  --border-subtle: #1a1f2c;
  
  --text-main: #f3f5f8;
  --text-muted: #8d95a5;
  --text-faint: #565e6e;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #60a5fa;

  --success: #10b981;
  --radius-sm: 8px;
  --radius-md: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.ambient-glow {
  position: absolute;
  top: -180px;
  left: 50%;
  transform: translateX(-50%);
  width: 760px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, rgba(9, 11, 14, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(9, 11, 14, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.brand-symbol {
  color: var(--accent-light);
  font-size: 18px;
}

.header-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: 9999px;
  font-size: 13px;
  color: var(--text-muted);
}

.status-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* Main */
main {
  flex: 1;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

/* Hero */
.welcome-hero, .error-hero {
  padding: 24px 0;
}

.badge {
  display: inline-block;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent-light);
  border: 1px solid rgba(37, 99, 235, 0.25);
  font-size: 12.5px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 6px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}

.badge-subtle {
  background: var(--bg-surface);
  color: var(--text-muted);
  border-color: var(--border);
}

.hero-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 640px;
  margin-bottom: 32px;
}

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

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-size: 14.5px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.05s ease;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

/* Banner */
.world-banner {
  position: relative;
  margin-top: 48px;
  width: 100%;
  height: 260px;
  border-radius: var(--radius-md);
  background: radial-gradient(ellipse at bottom, #121827 0%, #090b0e 100%);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 11, 14, 0.2) 0%, rgba(9, 11, 14, 0.8) 100%);
  pointer-events: none;
  z-index: 2;
}

.banner-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.banner-badge {
  position: relative;
  z-index: 3;
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(17, 20, 26, 0.75);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 500;
}

.banner-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-light);
  box-shadow: 0 0 8px var(--accent-light);
  animation: pulse-glow 2s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.15); }
}

@media (max-width: 600px) {
  .world-banner {
    height: 190px;
    margin-top: 36px;
  }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 24px 0;
  font-size: 13px;
  color: var(--text-faint);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 600px) {
  main {
    padding: 48px 0;
  }
  
  .footer-inner {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}