:root {
  --bg-deep: #0B0C0F;
  --bg-base: #0F1014;
  --bg-card: #13151B;
  --bg-card-hover: #191C24;
  --accent: #E11D48;
  --accent-bright: #FF2A5F;
  --accent-soft: rgba(225, 29, 72, 0.12);
  --border-default: #1F2233;
  --border-accent: #E11D48;
  --border-glow: rgba(225, 29, 72, 0.35);
  --text-main: #F0F0F5;
  --text-muted: #8A8D9E;
  --text-dim: #55596A;
  --status-green: #00D26A;
  --status-cyan: #38BDF8;
  --status-amber: #FFB800;
  --status-red: #ef4444;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Consolas", "Courier New", monospace;
  --max-w: 1200px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
}

body {
  background-color: var(--bg-deep);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ── Accessibility ── */
.skip-link {
  position: absolute;
  top: -40px;
  left: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 4px;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Ambient Background Grid ── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(31, 34, 51, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 34, 51, 0.2) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -2;
}

.glow-radial {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 480px;
  background: radial-gradient(ellipse at top, rgba(225, 29, 72, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* ── Header & Navigation ── */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 12, 15, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-default);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 800;
  letter-spacing: 0.05em;
  font-size: 1rem;
  flex-shrink: 0;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: block;
}

.badge-ver {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-bright);
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  padding: 0.12rem 0.45rem;
  border-radius: 3px;
  font-variant-numeric: tabular-nums;
}

nav.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color 0.15s;
}

nav.nav-links a:hover {
  color: var(--text-main);
}

nav.nav-links a.active {
  color: #fff;
  font-weight: 600;
}

nav.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -18px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--border-glow);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.58rem 1.15rem;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s, box-shadow 0.15s, border-color 0.15s, transform 0.12s;
  font-family: var(--font-sans);
  cursor: pointer;
  white-space: nowrap;
}

.btn svg {
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-bright);
  box-shadow: 0 0 16px var(--border-glow);
}

.btn-primary:hover {
  background: var(--accent-bright);
  box-shadow: 0 0 24px rgba(225, 29, 72, 0.55);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-default);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-dim);
}

.btn-outline-accent {
  background: transparent;
  color: var(--accent-bright);
  border-color: var(--border-accent);
}

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

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.78rem;
}

.btn-lg {
  padding: 0.78rem 1.5rem;
  font-size: 0.98rem;
}

/* ── HUD Cards & Reticles ── */
.hud-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: 4px;
  transition: border-color 0.15s, box-shadow 0.15s, background-color 0.15s;
}

.hud-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 20px rgba(225, 29, 72, 0.15);
}

.hud-card::before, .hud-card::after {
  content: '';
  position: absolute;
  width: 7px;
  height: 7px;
  pointer-events: none;
  transition: border-color 0.15s;
}

.hud-card::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--border-accent);
  border-left: 2px solid var(--border-accent);
}

.hud-card::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--border-accent);
  border-right: 2px solid var(--border-accent);
}

/* ── Section Headers ── */
.section-header {
  margin-bottom: 2.25rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-bright);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.25;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 0.5rem;
  max-width: 680px;
}

/* ── Typography & Tags ── */
.num-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  border: 1px solid var(--border-default);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
}

.tag-accent {
  background: var(--accent-soft);
  border-color: var(--border-accent);
  color: var(--accent-bright);
}

.tag-green {
  background: rgba(0, 210, 106, 0.12);
  border-color: rgba(0, 210, 106, 0.35);
  color: var(--status-green);
}

.tag-cyan {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.35);
  color: var(--status-cyan);
}

.tag-amber {
  background: rgba(255, 184, 0, 0.12);
  border-color: rgba(255, 184, 0, 0.35);
  color: var(--status-amber);
}

/* ── Toast Notification ── */
#toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 16px var(--border-glow);
  color: var(--text-main);
  padding: 0.75rem 1.25rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.2s, transform 0.2s;
}

#toast.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ── Footer ── */
footer.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-default);
  background: var(--bg-deep);
  padding: 3rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 0.82rem;
  margin-top: 0.6rem;
  max-width: 340px;
}

.footer-col h4 {
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col a:hover {
  color: var(--text-main);
}

.footer-bottom {
  border-top: 1px solid rgba(31, 34, 51, 0.6);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.footer-bottom a {
  color: var(--text-dim);
  text-decoration: none;
}
.footer-bottom a:hover {
  color: var(--text-muted);
}

/* ── Mobile Responsive ── */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 720px) {
  nav.nav-links {
    display: none;
  }
  .nav-mobile-btn {
    display: flex;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}