@font-face {
  font-family: "PC-9900";
  src: url("./fonts/pc-9900-v2.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

.dos-overlay {
  background: var(--terminal-black);
  color: var(--terminal-white);
  border: 0;
  font-family: var(--terminal-body);
  overflow: auto;
  padding: 20px;
}
.dos-overlay::backdrop { background: var(--terminal-black); }
.dos-terminal__body { max-width: 900px; margin: 0 auto; }
.dos-terminal__header { display: flex; align-items: center; justify-content: flex-end; gap: 16px; }
.dos-terminal__viewport { max-width: 100%; overflow: auto; margin: 16px 0; padding: 6px; }
.dos-terminal__frame {
  position: relative;
  font: 16px / 2.4ch var(--terminal-body);
  width: 80ch;
  height: 60ch;
  margin: 0 auto;
  animation: terminal-flicker var(--terminal-flicker-duration) linear infinite;
}
.dos-overlay::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  background: repeating-linear-gradient(to bottom, var(--terminal-scanline-light) 0 1px, transparent 1px 3px, var(--terminal-black) 3px 4px);
  opacity: var(--terminal-scanline-opacity);
  pointer-events: none;
}
.dos-terminal__screen {
  text-shadow: var(--terminal-glow);
  background: var(--terminal-black);
  color: var(--terminal-white);
  font-family: var(--terminal-body);
  font-size: 16px;
  font-weight: 400;
  font-variant-ligatures: none;
  letter-spacing: 0;
  line-height: 2.4ch;
  width: 80ch;
  height: 60ch;
  margin: 0;
  padding: 0;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
}
.dos-terminal__glyph { display: inline-block; width: 1ch; vertical-align: top; }
.dos-terminal__glyph--wide { font-size: 2ch; width: 1em; }
.dos-terminal__form { position: absolute; inset: 0; pointer-events: none; }
.dos-terminal__input {
  position: absolute;
  left: min(calc(var(--cursor-column, 4) * 1ch), calc(100% - 44px));
  top: min(calc(var(--cursor-row, 0) * 2.4ch), calc(100% - 44px));
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  opacity: 0;
  font-family: var(--terminal-body);
  font-size: 16px;
  pointer-events: auto;
}
.dos-terminal__cursor {
  position: absolute;
  left: calc(var(--cursor-column, 4) * 1ch);
  top: calc(var(--cursor-row, 0) * 2.4ch + 1.9ch);
  width: 1ch;
  height: .16ch;
  background: var(--terminal-white);
  pointer-events: none;
  visibility: hidden;
  animation: terminal-cursor var(--terminal-blink) step-end infinite;
}
.dos-terminal__frame:focus-within .dos-terminal__cursor { visibility: visible; }
.dos-overlay[data-phase="boot"] .dos-terminal__cursor { visibility: hidden; }
@keyframes terminal-cursor { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.dos-terminal__close {
  background: transparent;
  border: 1px solid transparent;
  opacity: .5;
  border-radius: var(--terminal-radius);
  color: var(--terminal-white);
  cursor: pointer;
  font: inherit;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 14px;
}
.dos-terminal__close:hover, .dos-terminal__close:focus-visible { opacity: 1; }
.dos-overlay :focus-visible { outline: 2px solid var(--terminal-white); outline-offset: 3px; }
@media (max-width: 600px) { .dos-overlay { padding: 12px; } }
@keyframes terminal-flicker {
  0%, 100% { opacity: 1; }
  19%, 64% { opacity: .97; }
  37%, 81% { opacity: .99; }
  48% { opacity: .95; }
}
@media (prefers-reduced-motion: reduce) {
  .dos-terminal__cursor, .dos-terminal__frame { animation: none; }
}