/* ============================================================
   BASE — vars, body, CRT overlays, background glitch layers
   glitch-level gating + reduced-motion safety
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

:root {
  --green: #39ff6e;
  --green-dim: #1a7a38;
  --green-faint: #0d2e18;
  --red: #ff2244;
  --amber: #ffaa00;
  --blue: #00aaff;
  --bg: #030a05;
  --scanline: rgba(0,0,0,0.18);
  --text: #b8ffcc;
  --text-dim: #4a8a5a;

  /* Classic Mac platinum palette */
  --plat: #dddddd;
  --plat-light: #f4f4f4;
  --plat-dark: #999999;
  --plat-darker: #555555;
  --mac-black: #111111;
  --titlebar-h: 24px;
  --menubar-h: 26px;

  --mac-font: 'Pixelify Sans', 'Share Tech Mono', monospace;
  --mono: 'Share Tech Mono', monospace;
}

html { height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.6;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  cursor: crosshair;
}

/* CRT scanlines overlay — always on, it's the calm floor */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    var(--scanline) 2px,
    var(--scanline) 4px
  );
  pointer-events: none;
  z-index: 99999;
}

/* Vignette */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,0.7) 100%);
  pointer-events: none;
  z-index: 99998;
}

::selection { background: var(--green); color: var(--bg); }

/* ============================================================
   BOOT SCREEN
   ============================================================ */
#boot {
  position: fixed;
  inset: 0;
  background: #0a0a0a;
  z-index: 50000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  cursor: pointer;
  transition: opacity 0.5s;
}
#boot.done { opacity: 0; pointer-events: none; }

.boot-mac {
  width: 120px;
  height: 150px;
  border: 3px solid var(--green);
  border-radius: 10px;
  position: relative;
  box-shadow: 0 0 30px rgba(57,255,110,0.4), inset 0 0 14px rgba(57,255,110,0.15);
  animation: bootMacGlitch 4s step-end infinite;
}
.boot-mac .screen {
  position: absolute;
  inset: 12px 12px 40px 12px;
  border: 2px solid var(--green);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'VT323', monospace;
  font-size: 44px;
  color: var(--green);
  text-shadow: 0 0 12px rgba(57,255,110,0.8);
  overflow: hidden;
}
.boot-mac .slot {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 4px;
  background: var(--green-dim);
}
@keyframes bootMacGlitch {
  0%, 90% { transform: none; filter: none; }
  91% { transform: translateX(-4px) skewX(-3deg); filter: hue-rotate(120deg); }
  92% { transform: translateX(3px); filter: none; }
  93%, 100% { transform: none; }
}

.boot-title {
  font-family: 'VT323', monospace;
  font-size: 34px;
  letter-spacing: 6px;
  color: #fff;
  text-shadow: 0 0 14px rgba(57,255,110,0.8);
}
.boot-title .v { color: var(--green-dim); font-size: 18px; letter-spacing: 3px; }

.boot-bar {
  width: min(360px, 76vw);
  height: 16px;
  border: 2px solid var(--green);
  padding: 2px;
  box-shadow: 0 0 14px rgba(57,255,110,0.3);
}
.boot-bar .fill {
  height: 100%;
  width: 0%;
  background: repeating-linear-gradient(90deg, var(--green) 0 8px, var(--green-dim) 8px 10px);
  transition: width 0.18s steps(4);
}

.boot-log {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 1px;
  height: 92px;
  width: min(360px, 76vw);
  overflow: hidden;
  text-align: left;
}
.boot-log .ok { color: var(--green); }
.boot-log .err { color: var(--red); }

.boot-skip {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  animation: blink 1.2s step-end infinite;
}

/* ============================================================
   BACKGROUND NOISE + GLITCH CANVAS
   ============================================================ */
.bg-noise {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.bg-noise span {
  position: absolute;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--green-dim);
  opacity: 0.32;
  user-select: none;
  animation: bgFlicker 4.5s step-end infinite;
}
@keyframes bgFlicker {
  0%, 90% { opacity: 0.3; color: var(--green-dim); }
  91%, 93% { opacity: 0.16; }
  94% { opacity: 0.42; color: var(--amber); }
  95%, 100% { opacity: 0.3; color: var(--green-dim); }
}

#glitch-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0.85;
  transition: opacity 0.6s;
}

/* VHS tracking sweep — smooth band drifting down screen */
#tracking {
  position: fixed;
  left: 0; right: 0; top: 0;
  height: 72px;
  transform: translateY(-90px);
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  mix-blend-mode: screen;
  background: linear-gradient(180deg,
    transparent,
    rgba(0,170,255,0.06) 44%,
    rgba(255,255,255,0.07) 50%,
    rgba(255,34,68,0.06) 56%,
    transparent);
  box-shadow: 0 0 18px rgba(57,255,110,0.05);
}
#tracking.run { animation: trackSweep 1.7s linear 1; }
@keyframes trackSweep {
  0%   { transform: translateY(-90px); opacity: 0; }
  8%   { opacity: 0.65; }
  50%  { opacity: 0.5; }
  92%  { opacity: 0.65; }
  100% { transform: translateY(100vh); opacity: 0; }
}

/* RGB chromatic split — brief, on headings */
@keyframes rgbSplit {
  0%   { text-shadow: none; transform: none; }
  25%  { text-shadow: -2px 0 var(--red), 2px 0 var(--blue); transform: translateX(1px); }
  50%  { text-shadow: 2px 0 var(--blue), -2px 0 var(--red); transform: translateX(-1px); }
  75%  { text-shadow: -1px 0 var(--red), 1px 0 var(--blue); transform: translateX(1px); }
  100% { text-shadow: none; transform: none; }
}
.rgb-hit { animation: rgbSplit 0.42s steps(4) 1; }

@keyframes blink { 50% { opacity: 0; } }

/* ============================================================
   GLITCH-LEVEL gating for CSS-driven effects
   data-glitch set by the engine (0..3). Lower = calmer.
   ============================================================ */
/* level 0 = "cleaned": ambient CRT only — slow, faint, no colour pops */
body[data-glitch="0"] .bg-noise span { animation-duration: 14s; opacity: 0.14; }
body[data-glitch="0"] #glitch-canvas { opacity: 0.25; }
body[data-glitch="0"] .menu-logo,
body[data-glitch="0"] .boot-mac { animation: none; }

body[data-glitch="1"] .bg-noise span { animation-duration: 9s; opacity: 0.2; }
body[data-glitch="1"] #glitch-canvas { opacity: 0.5; }

body[data-glitch="2"] .bg-noise span { animation-duration: 6s; }

/* ============================================================
   REDUCED MOTION — hard safety: kill all keyframe motion.
   Look is preserved (colour, scanlines, static noise); movement gone.
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .bg-noise span,
  .boot-mac,
  .menu-logo,
  #tracking,
  .rgb-hit,
  #slider-label,
  .status-blink,
  .mac-window.glitching,
  .form-jerk,
  .popup.shake { animation: none !important; }
  #glitch-canvas { opacity: 0.4; }
  html { scroll-behavior: auto; }
}