/* ==========================================================================
   eShield — Main Stylesheet
   Design system: Modern Tech / Cyber, restrained neon
   ========================================================================== */

:root {
  /* Color palette */
  --bg-void:       #05080d;
  --bg-base:       #0a0e14;
  --bg-surface:    #11161f;
  --bg-elevated:   #161c27;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-line:   rgba(0, 229, 255, 0.18);
  --border-strong: rgba(0, 229, 255, 0.45);

  --text-primary:  #e6edf3;
  --text-muted:    #8b949e;
  --text-dim:      #5a6373;

  --accent:        #00e5ff;
  --accent-soft:   rgba(0, 229, 255, 0.12);
  --accent-glow:   rgba(0, 229, 255, 0.55);
  --warn:          #ffb020;
  --danger:        #ff4d6d;

  /* Typography */
  --font-display:  "Chakra Petch", "Rajdhani", system-ui, sans-serif;
  --font-body:     "IBM Plex Sans", "Inter", system-ui, sans-serif;
  --font-mono:     "JetBrains Mono", "Fira Code", ui-monospace, monospace;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-24: 6rem;

  /* Layout */
  --container: 1240px;
  --gutter: 1.5rem;
  --header-h: 72px;

  /* Effects */
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 14px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 28px -6px var(--accent-glow);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

/* ---------- Scroll-scrubbed background image sequence ---------- */
.scene-frames {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -3;
  display: block;
  pointer-events: none;
  background: var(--bg-void);
}

/* Legacy decorative layers that competed visually with the scene background.
   Kept around as no-ops so any pre-existing markup stays harmless. */
.bg-points { display: none !important; }
.bg-points__dot {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  animation: bg-point-ping 6s linear infinite;
}
/* Same shape as the radar's pip-ping: sharp pop at 0%, settles by a few %,
   then fades out over the rest of the cycle. */
@keyframes bg-point-ping {
  0%   { opacity: 0.9;  transform: scale(2.2); box-shadow: 0 0 12px rgba(0, 229, 255, 0.85); }
  6%   { opacity: 0.8;  transform: scale(1);   box-shadow: 0 0 8px rgba(0, 229, 255, 0.55); }
  60%  { opacity: 0.25; transform: scale(1);   box-shadow: 0 0 4px rgba(0, 229, 255, 0.2);  }
  100% { opacity: 0;    transform: scale(1);   box-shadow: 0 0 2px rgba(0, 229, 255, 0);    }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-4);
  color: var(--text-primary);
}
h1 { font-size: clamp(2.4rem, 5.5vw, 4.5rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.8vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.75rem); }
h4 { font-size: 1.1rem; text-transform: uppercase; letter-spacing: 0.08em; }
p  { margin: 0 0 var(--sp-4); color: var(--text-muted); }

.mono { font-family: var(--font-mono); font-size: 0.85em; letter-spacing: 0.02em; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--sp-4);
}

.text-accent { color: var(--accent); }
.text-muted  { color: var(--text-muted); }
.text-dim    { color: var(--text-dim); }

/* ---------- Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section-pad {
  padding-block: clamp(var(--sp-16), 8vh, var(--sp-24));
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.85rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.btn--primary {
  background: var(--accent);
  color: var(--bg-void);
  box-shadow: 0 0 0 1px var(--accent), 0 0 24px -8px var(--accent-glow);
}
.btn--primary:hover {
  background: #5cf2ff;
  box-shadow: 0 0 0 1px #5cf2ff, 0 0 32px -4px var(--accent-glow);
  transform: translateY(-1px);
}
.btn--ghost {
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn--ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}
.btn .arrow {
  transition: transform var(--transition);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, rgba(5, 8, 13, 0.85), rgba(5, 8, 13, 0.4));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}
.logo__mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  color: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}
.logo__text { letter-spacing: 0.08em; }
.logo__text em {
  color: var(--accent);
  font-style: normal;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.main-nav a {
  display: inline-block;
  padding: var(--sp-2) var(--sp-4);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.main-nav a:hover,
.main-nav a.is-active {
  color: var(--accent);
  border-color: var(--border-line);
  background: var(--accent-soft);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.lang-switch button {
  padding: var(--sp-2) var(--sp-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  transition: var(--transition);
}
.lang-switch button.is-active {
  background: var(--accent-soft);
  color: var(--accent);
}
.lang-switch button:hover { color: var(--text-primary); }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: var(--sp-8) 0 var(--sp-6);
  background: var(--bg-void);
  font-size: 0.85rem;
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}
.footer__legal {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  max-width: 60ch;
}
.footer__nav {
  display: flex;
  gap: var(--sp-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.footer__nav a { color: var(--text-muted); transition: var(--transition); }
.footer__nav a:hover { color: var(--accent); }

/* ---------- HUD corner brackets (decorative) ---------- */
.hud {
  position: relative;
}
.hud::before, .hud::after,
.hud > .hud-c1, .hud > .hud-c2 {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--accent);
  opacity: 0.7;
  pointer-events: none;
}
.hud::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.hud::after  { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.hud > .hud-c1 { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.hud > .hud-c2 { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* ---------- Card ---------- */
.card {
  background: linear-gradient(180deg, var(--bg-surface), var(--bg-elevated));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: var(--sp-6);
  position: relative;
  transition: var(--transition);
}
.card:hover {
  border-color: var(--border-line);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* ---------- Spec readout / chip ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.2rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}
.chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.45; }
}

/* ---------- Utilities ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }

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