/* ============================================================
   CINEMA V4 — "Systems" futuristic layer (additive)
   CRT scanlines · scanning sweep · mission-control telemetry
   ticker · decrypting text-scramble on headings.
   Kill switch: window.SYS_OFF = true before script loads.
   z-band 1184-1188: above content, below v2 HUD/controls (9400+).
   ============================================================ */

:root { --sys-green: #21e68a; }

/* ---- 1. CRT SCANLINES ------------------------------------- */
.sys-scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 108;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,0.22) 3px,
    rgba(0,0,0,0) 4px);
  opacity: 0.5;
  /* PERF: plain alpha (was multiply) — dark lines over content read the same. */
  /* PERF: static scanlines (painted once). The flicker animation forced a
     full-viewport re-composite every frame. */
}

/* ---- 2. SCANNING SWEEP ------------------------------------ */
.sys-sweep {
  position: fixed;
  left: 0; right: 0; top: 0;
  height: 200px;
  pointer-events: none;
  z-index: 1187;
  background: linear-gradient(
    to bottom,
    rgba(33,230,138,0) 0%,
    rgba(33,230,138,0.035) 55%,
    rgba(33,230,138,0.09) 90%,
    rgba(150,255,210,0.55) 99%,
    rgba(33,230,138,0) 100%);
  mix-blend-mode: screen;
  opacity: 0;
  will-change: transform, opacity;
  animation: sys-sweep 8s cubic-bezier(.4,0,.6,1) infinite;
  animation-delay: 2.5s;
}
@keyframes sys-sweep {
  0%   { transform: translateY(-220px); opacity: 0; }
  7%   { opacity: 1; }
  93%  { opacity: 1; }
  100% { transform: translateY(100vh); opacity: 0; }
}

/* ---- 3. MISSION-CONTROL TELEMETRY TICKER ------------------ */
.sys-ticker {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: 24px;
  pointer-events: none;
  z-index: 120;
  overflow: hidden;
  display: flex;
  align-items: center;
  background: linear-gradient(to top, rgba(2,6,10,0.82), rgba(2,6,10,0.28) 60%, rgba(2,6,10,0));
  border-top: 1px solid rgba(33,230,138,0.14);
}
.sys-ticker-track {
  white-space: nowrap;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(33,230,138,0.82);
  text-shadow: 0 0 10px rgba(33,230,138,0.35);
  animation: sys-ticker 42s linear infinite;
  will-change: transform;
}
.sys-ticker-track .sys-hot { color: rgba(170,255,220,1); }
.sys-ticker-track .sys-sep { color: rgba(33,230,138,0.4); margin: 0 14px; }
@keyframes sys-ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ---- 4. TEXT SCRAMBLE (heading mid-decrypt state) --------- */
.section-h2.sys-decrypting { color: rgba(33,230,138,0.92); }
.section-h2.sys-decrypting .green { color: rgba(150,255,210,0.95); }

/* ---- MOBILE / REDUCED MOTION ------------------------------ */
@media (max-width: 760px) {
  .sys-sweep { display: none; }
  .sys-scanlines { opacity: 0.4; animation: none; }
  .sys-ticker { height: 18px; }
  .sys-ticker-track { font-size: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  .sys-sweep { display: none; }
  .sys-scanlines { animation: none; opacity: 0.4; }
  .sys-ticker-track { animation-duration: 90s; }
}