/* ───────────────────────── Classic Mode (DOS-style) ─────────────────────────
 * 80×25 character grid, deep blue background, monospace text.
 * Original retro-tui design — not a clone of any specific OS.
 */

.dos {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #0000aa; /* classic CGA blue */
  color: #ffffff;
  font-family: "Px437 IBM VGA 8x16", "VT323", "IBM Plex Mono", "Consolas", "Courier New", monospace;
  font-size: 16px;
  line-height: 1.25;
  letter-spacing: 0;
  overflow: hidden;
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: grayscale;
  image-rendering: pixelated;
  user-select: text;
}

/* CRT-ish scanline overlay (subtle) */
.dos::after {
  content: "";
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.12) 0,
      rgba(0, 0, 0, 0.12) 1px,
      transparent 1px,
      transparent 3px
    );
  pointer-events: none;
  mix-blend-mode: multiply;
  opacity: 0.55;
  z-index: 5;
}
/* Subtle vignette + chromatic glow */
.dos::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 50%,
    rgba(0, 0, 0, 0.45) 100%
  );
  pointer-events: none;
  z-index: 4;
}

.dos-screen {
  position: relative;
  height: 100%;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  z-index: 1;
}

.dos-screen-boot {
  display: block;
  padding: 24px 28px;
}

/* ───── Boot screen ───── */
.dos-boot {
  background: #000000;
}
.dos-boot-text {
  margin: 0;
  font-family: inherit;
  font-size: 16px;
  color: #c8c8c8;
  white-space: pre-wrap;
}
.dos-boot-text > div { min-height: 1.25em; }

.dos-cursor {
  display: inline-block;
  width: 0.6em;
  margin-left: 2px;
  color: #c8c8c8;
  animation: dos-blink 1s steps(2, start) infinite;
  transform: translateY(0.05em);
}

@keyframes dos-blink {
  to { visibility: hidden; }
}

.dos-blink {
  animation: dos-blink 1s steps(2, start) infinite;
  color: #ffff55;
}

/* ───── Title bar ───── */
.dos-title {
  background: #aaaaaa;
  color: #000000;
  padding: 2px 12px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.04em;
}

/* ───── Menu bar ───── */
.dos-menubar {
  background: #aaaaaa;
  color: #000000;
  padding: 2px 8px;
  display: flex;
  align-items: center;
  gap: 2px;
  border-bottom: 1px solid #555555;
  font-weight: bold;
}
.dos-menu-item {
  background: transparent;
  border: 0;
  padding: 2px 12px;
  font: inherit;
  color: #000000;
  cursor: pointer;
  display: inline-flex;
  gap: 6px;
  align-items: baseline;
}
.dos-menu-item:hover {
  background: #000000;
  color: #ffffff;
}
.dos-menu-item.active {
  background: #000000;
  color: #ffffff;
}
.dos-menu-key {
  color: #aa0000;
  font-weight: bold;
  text-decoration: underline;
}
.dos-menu-item.active .dos-menu-key,
.dos-menu-item:hover .dos-menu-key {
  color: #ffff55;
}
.dos-menu-spacer { flex: 1; }
.dos-menu-file {
  font-weight: normal;
  color: #555555;
  font-size: 14px;
}

/* ───── Body ───── */
.dos-body {
  position: relative;
  padding: 16px 24px 0;
  overflow: hidden;
}

/* Window with ASCII border feel */
.dos-window {
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr;
  background: #0000aa;
  border: 2px solid #ffffff;
  box-shadow:
    inset 0 0 0 1px #0000aa,
    inset 0 0 0 2px #ffffff,
    4px 4px 0 0 rgba(0, 0, 0, 0.5);
}
.dos-window-titlebar {
  background: #0000aa;
  color: #ffffff;
  padding: 0 8px;
  text-align: center;
  margin-top: -10px; /* sit on top border */
}
.dos-window-title {
  background: #0000aa;
  padding: 0 8px;
  display: inline-block;
  color: #ffff55;
  font-weight: bold;
}
.dos-window-body {
  padding: 16px 22px 22px;
  overflow: auto;
  scrollbar-color: #aaaaaa #0000aa;
}
.dos-window-body::-webkit-scrollbar { width: 16px; }
.dos-window-body::-webkit-scrollbar-track {
  background: repeating-linear-gradient(
    45deg,
    #0000aa 0, #0000aa 2px, #5555ff 2px, #5555ff 4px
  );
}
.dos-window-body::-webkit-scrollbar-thumb {
  background: #aaaaaa;
  border: 2px solid #555555;
}

/* ───── Content typography ───── */
.dos-doc { max-width: 78ch; }
.dos-h1 {
  margin: 0 0 4px;
  font-size: 18px;
  letter-spacing: 0.08em;
  color: #ffff55;
  font-weight: bold;
}
.dos-subtitle {
  color: #55ffff;
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.dos-rule {
  color: #5555ff;
  margin: 4px 0 14px;
  font-weight: bold;
  letter-spacing: -0.02em;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
}
.dos-p {
  margin: 0 0 1em;
  color: #ffffff;
  max-width: 72ch;
}
.dos-doc-footer {
  margin-top: 18px;
  color: #aaaaaa;
}
.dos-kbd {
  display: inline-block;
  font: inherit;
  padding: 0 5px;
  background: #aaaaaa;
  color: #000000;
  border: 1px solid #555555;
  font-weight: bold;
}

/* ───── Work / experience ───── */
.dos-job { margin-bottom: 18px; }
.dos-job-head { color: #ffffff; }
.dos-job-range { color: #ffff55; font-weight: bold; }
.dos-job-role { color: #55ff55; font-weight: bold; }
.dos-job-co { color: #55ffff; margin-bottom: 4px; }
.dos-job-acq { color: #aaaaaa; }
.dos-bullets {
  list-style: none;
  padding: 0;
  margin: 4px 0 0 14px;
}
.dos-bullets li {
  margin-bottom: 2px;
  color: #ffffff;
  max-width: 70ch;
}
.dos-bullet { color: #ffff55; margin-right: 4px; }

/* ───── Patents ───── */
.dos-patent { margin-bottom: 16px; }
.dos-patent-head { color: #ffffff; }
.dos-patent-title {
  color: #ffff55;
  margin: 2px 0 2px 4px;
  max-width: 72ch;
}
.dos-patent-cp { color: #55ffff; margin-left: 0; }
.dos-patent-inventors {
  color: #aaaaaa;
  margin-top: 4px;
  margin-left: 4px;
  font-size: 14px;
  max-width: 76ch;
}
.dos-me { color: #55ff55; font-weight: bold; }
.dos-dim { color: #aaaaaa; }

/* ───── Contact ───── */
.dos-ini {
  margin: 0 0 12px;
  font-family: inherit;
  font-size: 16px;
  color: #aaaaaa;
  white-space: pre-wrap;
}
.dos-contact-row {
  display: flex;
  gap: 8px;
  align-items: baseline;
  color: #ffffff;
  margin: 2px 0;
}
.dos-contact-key {
  color: #55ffff;
  white-space: pre;
}
.dos-contact-eq { color: #aaaaaa; }
.dos-link {
  color: #ffff55;
  text-decoration: underline;
  text-decoration-style: dotted;
}
.dos-link:hover {
  background: #ffff55;
  color: #0000aa;
  text-decoration: none;
}

/* ───── Status bar ───── */
.dos-status {
  background: #aaaaaa;
  color: #000000;
  padding: 2px 12px;
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 14px;
  border-top: 1px solid #555555;
}
.dos-status-key b {
  background: #000000;
  color: #aaaaaa;
  padding: 0 5px;
  margin-right: 4px;
  font-weight: bold;
}
.dos-status-spacer { flex: 1; }
.dos-status-clock {
  color: #000000;
  font-weight: bold;
  letter-spacing: 0.06em;
}
.dos-exit-btn {
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  color: #000000;
  cursor: pointer;
}
.dos-exit-btn:hover { text-decoration: underline; }
.dos-exit-btn:hover b { background: #aa0000; color: #ffff55; }

/* ───── Entry to classic mode (the launcher) ───── */
.classic-launcher {
  position: relative;
  display: inline-flex;
}
.classic-trigger {
  display: inline-flex;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: transparent;
  border: 0;
  padding: 2px 6px;
  cursor: pointer;
  opacity: 0.7;
  transition: color 160ms ease, background 160ms ease, opacity 160ms ease;
}
.classic-trigger:hover,
.classic-trigger[aria-expanded="true"] {
  color: #000;
  background: #fff;
  opacity: 1;
}

.classic-launcher-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  min-width: 140px;
  background: #0b0b10;
  border: 1px solid rgba(255,255,255,0.18);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  padding: 4px 0;
  z-index: 50;
}
.classic-launcher-item {
  background: transparent;
  border: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
  text-align: left;
  padding: 7px 14px;
  cursor: pointer;
  transition: color 120ms ease, background 120ms ease;
}
.classic-launcher-item:hover {
  color: #000;
  background: #fff;
}

.botbar-end {
  justify-self: end;
  display: flex;
  align-items: center;
}
@media (max-width: 720px), (hover: none) and (pointer: coarse) {
  .botbar-end { display: none; }
}

/* Mobile — shrink classic mode font and let it scroll */
@media (max-width: 720px) {
  .dos { font-size: 13px; }
  .dos-body { padding: 8px 10px 0; }
  .dos-window-body { padding: 12px 12px 18px; }
  .dos-status {
    flex-wrap: wrap;
    font-size: 11px;
    gap: 8px 14px;
    padding: 4px 10px;
  }
  .dos-menubar { flex-wrap: wrap; }
  .dos-menu-file { display: none; }
  .dos-rule { font-size: 12px; }
  .dos-h1 { font-size: 15px; }
}