:root {
  --bg: #0a0a12;
  --panel: #14141f;
  --ink: #e7e3f5;
  --muted: #8a85a8;
  --accent: #b388ff;
  --accent-dim: #6c4fd6;
  --line: #262238;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1a1430 0%, var(--bg) 60%);
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

header { text-align: center; padding: 36px 16px 12px; }
header h1 { margin: 0; font-size: 34px; letter-spacing: 0.5px; }
header h1 span { color: var(--accent); }
.tagline { color: var(--muted); margin: 6px 0 0; }
.status { color: var(--accent-dim); font-size: 13px; margin-top: 10px; }
.status.ready { color: #5fd38a; }
.status.error { color: #ff7a7a; }

.tabs { display: flex; gap: 8px; justify-content: center; margin: 18px 0 0; }
.tabs button {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  padding: 8px 18px; border-radius: 999px; cursor: pointer; font-size: 14px;
}
.tabs button.active { color: var(--ink); border-color: var(--accent-dim); background: #1b1530; }

main { max-width: 920px; margin: 18px auto 60px; padding: 0 16px; }
.tab { display: none; }
.tab.active { display: block; }

textarea {
  width: 100%; height: 320px; resize: vertical;
  background: var(--panel); color: var(--ink); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px; font: 14px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
  tab-size: 4;
}

.controls { display: flex; align-items: center; gap: 12px; margin: 12px 0; flex-wrap: wrap; }
button {
  background: var(--accent-dim); color: white; border: 0; cursor: pointer;
  padding: 9px 20px; border-radius: 8px; font-size: 14px; font-weight: 600;
}
button:disabled { opacity: 0.45; cursor: default; }
button:not(:disabled):hover { background: var(--accent); }

#output {
  background: #07070d; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; min-height: 90px; white-space: pre-wrap;
  font: 13.5px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; color: #cfe9d4;
}

#screen {
  width: 100%; max-width: 640px; display: block; margin: 0 auto;
  image-rendering: pixelated; background: #07070d;
  border: 1px solid var(--line); border-radius: 10px;
}
select, label.file, .speed { color: var(--muted); font-size: 14px; }
select {
  background: var(--panel); color: var(--ink); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 10px;
}
label.file { border: 1px solid var(--line); padding: 8px 14px; border-radius: 8px; cursor: pointer; }
label.file input { display: none; }
.keys { color: var(--muted); text-align: center; font-size: 13px; }
code { color: var(--accent); background: #1b1530; padding: 1px 6px; border-radius: 5px; }

footer { text-align: center; color: var(--muted); font-size: 13px; padding: 20px; }
footer a { color: var(--accent); text-decoration: none; }