/* ============================================================
   PROGRESS — evolving game shell
   The body carries a class era-1 … era-5; the page chrome
   modernizes alongside the game itself.
   ============================================================ */

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

:root {
  --fg: #33ff66;
  --fg-dim: #1d8c3d;
  --bg: #04080a;
  --screen-bg: #020604;
  --accent: #aaffcc;
  --frame-radius: 18px;
  --scanline-opacity: 0.22;
  --glow: 0 0 6px rgba(51,255,102,.55);
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: "Courier New", Courier, monospace;
  overflow: hidden;
  transition: background 1.2s ease;
}

#frame {
  position: absolute;
  left: 50%; top: 50%;
  width: 1000px;
  transform: translate(-50%, -50%) scale(var(--fit, 1));
  transform-origin: center center;
}

#hud {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 14px;
  font-size: 15px;
  letter-spacing: 2px;
  color: var(--fg-dim);
  text-shadow: var(--glow);
}
#hud-title { color: var(--fg); font-weight: bold; }
#hud-fragments { color: var(--accent); font-size: 17px; letter-spacing: 4px; }

#screen {
  position: relative;
  width: 1000px;
  height: 640px;
  background: var(--screen-bg);
  border: 2px solid var(--fg-dim);
  border-radius: var(--frame-radius);
  overflow: hidden;
  box-shadow: 0 0 32px rgba(0,0,0,.8), inset 0 0 70px rgba(0,0,0,.55), var(--glow);
  transition: border-color 1.2s ease, border-radius 1.2s ease, background 1.2s ease;
}

#canvas {
  position: absolute;
  left: 20px; top: 20px;
  width: 960px; height: 600px;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#hint {
  padding: 8px 14px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--fg-dim);
  text-align: center;
  min-height: 30px;
  text-shadow: var(--glow);
}

.hidden { display: none !important; }

/* ---------- terminal (era 1 + ending) ---------- */

#terminal {
  position: absolute;
  inset: 0;
  padding: 26px 34px 20px 34px;
  display: flex;
  flex-direction: column;
  font-size: 19px;
  line-height: 1.45;
  text-shadow: var(--glow);
}
#term-out {
  flex: 1;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  scrollbar-width: none;
}
#term-out::-webkit-scrollbar { display: none; }
#term-out .echo { color: var(--fg-dim); }
#term-out .voice { color: var(--accent); font-style: italic; }
#term-out .title-art { color: var(--accent); line-height: 1.15; }
#term-out p { margin: 0 0 10px 0; }
#term-line { display: flex; align-items: baseline; padding-top: 6px; }
#term-prompt { margin-right: 10px; color: var(--accent); }
#term-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg);
  font: inherit;
  text-shadow: inherit;
  caret-color: var(--accent);
}

/* ---------- CRT scanlines / vignette ---------- */

#scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: var(--frame-radius);
  background:
    repeating-linear-gradient(0deg,
      rgba(0,0,0,var(--scanline-opacity)) 0px,
      rgba(0,0,0,var(--scanline-opacity)) 1px,
      transparent 2px, transparent 4px),
    radial-gradient(ellipse at center, transparent 55%, rgba(0,0,0,.38) 100%);
  transition: opacity 1.2s ease;
}

/* ---------- transition overlay ---------- */

#overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #000;
  font-size: 22px;
  letter-spacing: 3px;
  text-align: center;
  text-shadow: var(--glow);
}
#overlay .ov-big {
  font-size: 44px;
  letter-spacing: 10px;
  color: var(--accent);
  margin-bottom: 26px;
}
#overlay .ov-line { color: var(--fg); margin: 4px 0; min-height: 28px; }
#overlay .ov-dim { color: var(--fg-dim); font-size: 15px; margin-top: 30px; }
#overlay.glitching { animation: ov-shake .09s infinite; }
@keyframes ov-shake {
  0%   { transform: translate(0,0); }
  25%  { transform: translate(-3px,2px); }
  50%  { transform: translate(2px,-2px); }
  75%  { transform: translate(-1px,-2px); }
  100% { transform: translate(2px,2px); }
}

/* ============================================================
   ERA SKINS
   ============================================================ */

/* era 1: green phosphor, deep CRT */
body.era-1 {
  --fg: #33ff66; --fg-dim: #1d8c3d; --accent: #aaffcc;
  --bg: #04080a; --screen-bg: #020604;
  --scanline-opacity: 0.22; --frame-radius: 18px;
  --glow: 0 0 6px rgba(51,255,102,.55);
}

/* era 2: amber terminal */
body.era-2 {
  --fg: #ffb000; --fg-dim: #8c5e00; --accent: #ffe08a;
  --bg: #0a0703; --screen-bg: #060402;
  --scanline-opacity: 0.16; --frame-radius: 14px;
  --glow: 0 0 6px rgba(255,176,0,.45);
}

/* era 3: 8-bit console, faint CRT */
body.era-3 {
  --fg: #e8e8e8; --fg-dim: #7a8ba8; --accent: #ffd25e;
  --bg: #10142a; --screen-bg: #0a0d1f;
  --scanline-opacity: 0.08; --frame-radius: 10px;
  --glow: none;
}

/* era 4: 16-bit, clean screen */
body.era-4 {
  --fg: #f4f4f4; --fg-dim: #8fa3b8; --accent: #7ee8a2;
  --bg: #131a22; --screen-bg: #0c1117;
  --scanline-opacity: 0.0; --frame-radius: 8px;
  --glow: none;
}

/* era 5: modern, sleek glow */
body.era-5 {
  --fg: #e8f4ff; --fg-dim: #5d7e9e; --accent: #66ccff;
  --bg: #05070d; --screen-bg: #04060b;
  --scanline-opacity: 0.0; --frame-radius: 4px;
  --glow: 0 0 10px rgba(102,204,255,.5);
}
body.era-5 #screen { box-shadow: 0 0 60px rgba(102,204,255,.18), inset 0 0 40px rgba(0,0,0,.5); }