:root {
  --bg: #0e1116;
  --bg2: #161b22;
  --panel: #1c2330;
  --panel2: #242c3a;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --warn: #d29922;
  --danger: #f85149;
  --crt: #0a1a0a;
  --crt-glow: #33ff66;
  --mono: "IBM Plex Mono", "Noto Sans Mono", ui-monospace, monospace;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --radius: 12px;
  --shadow: 0 10px 40px rgba(0,0,0,.45);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--sans); }
body { min-height: 100dvh; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.app { max-width: 1400px; margin: 0 auto; padding: 16px 16px 48px; }
.header {
  display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: flex-start;
  justify-content: space-between; margin-bottom: 16px;
}
.brand h1 { margin: 0; font-size: 1.45rem; letter-spacing: .02em; }
.brand .subtitle { margin: 4px 0 0; color: var(--muted); font-size: .92rem; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.badge {
  font-size: .75rem; padding: 3px 8px; border-radius: 999px;
  background: var(--panel2); border: 1px solid var(--border); color: var(--muted);
}
.badge.ok { color: var(--accent2); border-color: #238636; }
.badge.warn { color: var(--warn); border-color: #9e6a03; }

.toolbar, .panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.toolbar {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 10px 12px; margin-bottom: 14px;
}
.btn {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; transition: .15s ease; white-space: nowrap;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: #1f6feb; border-color: #1f6feb; color: #fff; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-danger { background: #da3633; border-color: #da3633; }
.btn-sm { padding: 5px 9px; font-size: .85rem; }
.sep { width: 1px; height: 28px; background: var(--border); margin: 0 4px; }
.speed-wrap { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: .85rem; }
.speed-wrap input[type=range] { width: 120px; }

.layout {
  display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(300px, .9fr);
  gap: 14px; align-items: start;
}
@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
}

.screen-panel { padding: 12px; }
.screen-head {
  display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 10px;
}
.screen-head h2 { margin: 0; font-size: 1rem; }
.status-pill {
  font-family: var(--mono); font-size: .78rem; color: var(--muted);
  background: var(--bg2); padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border);
}
.crt-wrap {
  position: relative; background: radial-gradient(ellipse at center, #102010 0%, var(--crt) 70%);
  border-radius: 10px; border: 2px solid #1a2a1a; overflow: hidden;
  box-shadow: inset 0 0 40px rgba(0,0,0,.6), 0 0 24px rgba(51,255,102,.08);
}
#screen {
  display: block; width: 100%; height: auto; image-rendering: pixelated;
  background: #000; aspect-ratio: 4 / 3;
}
.crt-overlay {
  pointer-events: none; position: absolute; inset: 0;
  background: repeating-linear-gradient(to bottom, rgba(0,0,0,.12) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply; opacity: .55;
}
.drop-hint {
  margin-top: 10px; padding: 10px; border: 1px dashed var(--border); border-radius: 8px;
  color: var(--muted); font-size: .9rem; text-align: center;
}
.drop-hint.drag { border-color: var(--accent); color: var(--accent); background: rgba(88,166,255,.08); }

.side { display: flex; flex-direction: column; gap: 12px; }
.panel { padding: 12px; }
.panel h2, .panel h3 { margin: 0 0 10px; font-size: .98rem; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.tab {
  background: transparent; border: 1px solid transparent; color: var(--muted);
  border-radius: 8px; padding: 6px 10px;
}
.tab.is-active { background: var(--panel2); border-color: var(--border); color: var(--text); }

.regs {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 6px;
  font-family: var(--mono); font-size: .82rem;
}
.reg {
  display: flex; justify-content: space-between; gap: 8px;
  background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; padding: 5px 8px;
}
.reg .name { color: var(--muted); }
.flags { margin-top: 8px; font-family: var(--mono); font-size: .8rem; color: var(--muted); word-break: break-all; }
.flags b { color: var(--accent2); }

.disasm, .memview, .iolog {
  font-family: var(--mono); font-size: .78rem; background: var(--bg2);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px;
  max-height: 220px; overflow: auto; white-space: pre; line-height: 1.45;
}
.disasm .cur { background: rgba(88,166,255,.2); color: #fff; }

.form-grid { display: grid; gap: 8px; }
.form-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
label.field { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; color: var(--muted); flex: 1; min-width: 120px; }
label.field input, label.field select {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px; padding: 7px 9px; color: var(--text);
}

.softkbd {
  display: none; margin-top: 10px; gap: 4px; flex-direction: column;
}
.softkbd.show { display: flex; }
.softkbd .row { display: flex; flex-wrap: wrap; gap: 4px; justify-content: center; }
.softkbd button {
  min-width: 34px; min-height: 34px; padding: 6px 8px; font-family: var(--mono); font-size: .75rem;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 6px;
}
.softkbd button.wide { min-width: 72px; }
.softkbd button:active { background: var(--accent); color: #000; }

.help details { margin-top: 6px; }
.help summary { cursor: pointer; color: var(--accent); }
.help p, .help li { color: var(--muted); font-size: .9rem; line-height: 1.55; }
.footer {
  margin-top: 18px; color: var(--muted); font-size: .82rem; text-align: center;
}
.footer a { color: var(--accent); }