:root {
  --case: #d8cdb0;
  --case-dark: #b7a988;
  --ink: #2b2418;
  --accent: #c8551b;
  --accent2: #4a7c2f;
  --panel: #efe8d4;
  --phosphor: #7CFC5A;
  --key: #26221a;
  --key-face: #3a352b;
  --key-top: #4a4436;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'IBM Plex Mono', monospace;
  background:
    radial-gradient(circle at 20% 10%, #3a3224 0%, transparent 50%),
    radial-gradient(circle at 80% 90%, #2b2618 0%, transparent 50%),
    #1c1810;
  color: var(--ink);
  min-height: 100vh;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px;
}

header { text-align: center; margin-bottom: 20px; }
header h1 {
  font-family: 'VT323', monospace;
  color: var(--phosphor);
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0;
  letter-spacing: 2px;
  text-shadow: 0 0 12px rgba(124,252,90,0.5);
}
.subtitle { color: #b7a988; font-size: 0.85rem; margin: 6px 0 0; }

section {
  background: var(--case);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 18px;
  box-shadow: 0 6px 0 var(--case-dark), 0 8px 20px rgba(0,0,0,0.4);
  border: 2px solid var(--case-dark);
}

h2 {
  font-family: 'VT323', monospace;
  font-size: 1.5rem;
  margin: 0 0 10px;
  color: var(--accent);
  letter-spacing: 1px;
}
h2 small { color: var(--ink); font-size: 0.9rem; opacity: 0.6; }
.hint { font-size: 0.78rem; color: #6b6250; margin: 6px 0; }

/* ROM loader */
.rom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}
.rom-drop {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "status name" "status addr" "status info";
  gap: 2px 12px;
  align-items: center;
  padding: 14px;
  background: var(--panel);
  border: 2px dashed var(--case-dark);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.rom-drop:hover { border-color: var(--accent); }
.rom-drop.drag { border-color: var(--accent2); background: #e6efd4; }
.rom-status { grid-area: status; font-size: 1.8rem; }
.rom-name { grid-area: name; font-weight: 600; }
.rom-addr { grid-area: addr; color: var(--accent); font-size: 0.85rem; }
.rom-info { grid-area: info; font-size: 0.72rem; color: #6b6250; }

/* Control bar */
.control-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.control-bar button, .control-bar select {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 600;
  padding: 9px 14px;
  border: none;
  border-radius: 6px;
  background: var(--key-top);
  color: #e8e0cc;
  cursor: pointer;
  box-shadow: 0 3px 0 var(--key);
  transition: transform .08s;
}
.control-bar button:hover:not(:disabled) { transform: translateY(-1px); }
.control-bar button:active:not(:disabled) { transform: translateY(2px); box-shadow: 0 1px 0 var(--key); }
.control-bar button:disabled { opacity: 0.4; cursor: not-allowed; }
.control-bar select { background: var(--panel); color: var(--ink); box-shadow: 0 3px 0 var(--case-dark); }

/* Stage */
.stage {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 18px;
  align-items: start;
}
@media (max-width: 780px) {
  .stage { grid-template-columns: 1fr; }
}

/* CRT */
.crt { }
.crt-bezel {
  position: relative;
  background: #14140f;
  border-radius: 16px;
  padding: 22px;
  box-shadow: inset 0 0 40px rgba(0,0,0,0.9), 0 0 0 6px #2a271f, 0 0 0 10px #3a352b;
  overflow: hidden;
}
#screen {
  width: 100%;
  height: auto;
  display: block;
  image-rendering: pixelated;
  border-radius: 6px;
  background: #0a1a0a;
  box-shadow: 0 0 30px rgba(124,252,90,0.25);
}
.scanlines {
  position: absolute;
  inset: 22px;
  border-radius: 6px;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom, rgba(0,0,0,0) 0px, rgba(0,0,0,0) 2px, rgba(0,0,0,0.18) 3px);
}
.crt-brand {
  text-align: right;
  font-family: 'VT323', monospace;
  font-size: 1.3rem;
  color: var(--accent);
  letter-spacing: 3px;
  margin-top: 8px;
  padding-right: 8px;
}

/* Side panels */
.side-panels { display: flex; flex-direction: column; gap: 12px; }
.panel {
  background: var(--panel);
  border: 2px solid var(--case-dark);
  border-radius: 8px;
  overflow: hidden;
}
.panel summary {
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 600;
  background: var(--case-dark);
  color: var(--ink);
  user-select: none;
}
.panel pre {
  margin: 0;
  padding: 12px;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--accent2);
  white-space: pre-wrap;
}
.memmap { padding: 6px; overflow-x: auto; }
.memmap table { width: 100%; border-collapse: collapse; font-size: 0.68rem; }
.memmap th, .memmap td {
  text-align: left; padding: 4px 6px; border-bottom: 1px solid var(--case-dark);
}
.memmap th { color: var(--accent); }
.memmap td:first-child { font-weight: 600; white-space: nowrap; }

/* Keyboard */
.kbd-row { display: flex; gap: 5px; justify-content: center; margin-bottom: 5px; flex-wrap: wrap; }
.key {
  min-width: 34px;
  height: 40px;
  padding: 0 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  font-weight: 600;
  color: #e8e0cc;
  background: linear-gradient(#4a4436, #2f2b22);
  border: none;
  border-radius: 5px;
  box-shadow: 0 3px 0 #17140e;
  cursor: pointer;
  user-select: none;
  transition: transform .05s, box-shadow .05s;
}
.key-wide { min-width: 160px; }
.key-mid { min-width: 60px; }
.key:active, .key.active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 #17140e;
  background: linear-gradient(var(--accent), #9c3f12);
  color: #fff;
}

/* Footer */
footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 4px;
  font-size: 0.8rem;
  color: #8a7f68;
}
footer a { color: var(--phosphor); text-decoration: none; font-weight: 600; }
footer a:hover { text-decoration: underline; }