:root {
  --bg: #1F2452;
  --fg: #E0E0E0;
  --accent: #5FD7D7;
  --highlight: #FFD75F;
  --dim: #8888AA;
  --border: #5FD7D7;
  --danger: #FF5F5F;
  --select-bg: #5FD7D7;
  --select-fg: #000;
  --code-bg: rgba(95, 215, 215, 0.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.55 ui-monospace, "Cascadia Mono", "Cascadia Code", Consolas, "Liberation Mono", monospace;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  max-width: 96ch;
  margin: 0 auto;
  padding: 1ch;
  display: flex;
  flex-direction: column;
}

/* BIOS title bar */
.bios-title {
  border: 1px solid var(--border);
  padding: 0.4ch 1ch;
  text-align: center;
  color: var(--highlight);
  font-weight: bold;
  letter-spacing: 0.05em;
}

.bios-title .copy { color: var(--dim); font-weight: normal; font-size: 0.9em; display: block; }

/* BIOS tabs */
nav.bios-tabs {
  display: flex;
  border: 1px solid var(--border);
  border-top: none;
}

nav.bios-tabs a {
  flex: 1;
  text-align: center;
  padding: 0.5ch 0.5ch;
  color: var(--fg);
  text-decoration: none;
  border-right: 1px solid var(--border);
  white-space: nowrap;
}

nav.bios-tabs a:last-child { border-right: none; }

nav.bios-tabs a:hover,
nav.bios-tabs a:focus {
  background: var(--select-bg);
  color: var(--select-fg);
  outline: none;
}

nav.bios-tabs a[aria-current="page"] {
  background: var(--select-bg);
  color: var(--select-fg);
  font-weight: bold;
}

nav.bios-tabs button.exit {
  flex: 0 0 auto;
  background: var(--bg);
  border: none;
  border-left: 1px solid var(--border);
  color: var(--danger);
  cursor: pointer;
  font: inherit;
  padding: 0.5ch 1.5ch;
  letter-spacing: 0.05em;
}

nav.bios-tabs button.exit:hover,
nav.bios-tabs button.exit:focus {
  background: var(--danger);
  color: var(--select-fg);
  outline: none;
}

/* Main panel */
main {
  flex: 1;
  border: 1px solid var(--border);
  border-top: none;
  padding: 1.5ch 2ch 2ch;
  min-height: 55vh;
}

h1 {
  color: var(--highlight);
  font-size: 1.05em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5ch;
  margin-bottom: 1ch;
}

h1::before { content: "▸ "; color: var(--accent); }

h2 {
  color: var(--accent);
  font-size: 1em;
  margin-top: 2ch;
  margin-bottom: 0.6ch;
  letter-spacing: 0.03em;
}

h2::before { content: "[ "; color: var(--dim); }
h2::after  { content: " ]"; color: var(--dim); }

h3 {
  color: var(--fg);
  font-size: 1em;
  margin-top: 1.2ch;
  margin-bottom: 0.3ch;
}

p { margin: 0.6ch 0; }

ul {
  padding-left: 2.5ch;
  margin: 0.6ch 0;
  list-style: none;
}

ul li::before { content: "• "; color: var(--accent); margin-left: -1.5ch; }
li { margin: 0.25ch 0; }

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover,
a:focus {
  background: var(--accent);
  color: var(--select-fg);
  text-decoration: none;
  outline: none;
}

strong { color: var(--highlight); font-weight: bold; }
em { color: var(--dim); font-style: normal; }
code {
  background: var(--code-bg);
  color: var(--highlight);
  padding: 0 0.4ch;
  border-radius: 1px;
  font-family: inherit;
}

.lede {
  color: var(--dim);
  font-style: normal;
  margin: 0.4ch 0 1ch;
}

blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1.5ch;
  margin: 1ch 0;
  color: var(--dim);
}

/* Projects */
.project {
  border-left: 2px solid var(--accent);
  padding: 0.5ch 0 0.5ch 1.5ch;
  margin: 1.2ch 0;
}

.tag {
  display: inline-block;
  border: 1px solid var(--dim);
  padding: 0 0.5ch;
  font-size: 0.78em;
  margin-right: 0.3ch;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  vertical-align: middle;
}

/* Status bar */
footer.bios-status {
  border: 1px solid var(--border);
  border-top: none;
  padding: 0.4ch 1ch;
  font-size: 0.88em;
  color: var(--fg);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5ch;
  align-items: center;
}

footer.bios-status .keys {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5ch;
}

footer.bios-status kbd {
  color: var(--highlight);
  font-family: inherit;
  border: 1px solid var(--dim);
  padding: 0 0.4ch;
  margin-right: 0.3ch;
}

footer.bios-status .meta {
  margin-left: auto;
  color: var(--dim);
  font-size: 0.92em;
}

/* CMOS warning slot — hidden by default, JS may show */
.cmos {
  display: none;
  text-align: center;
  color: var(--danger);
  padding: 0.4ch 0;
  border: 1px solid var(--danger);
  border-top: none;
  font-size: 0.9em;
}

.cmos.show { display: block; animation: blink 2.4s infinite; }
@keyframes blink { 50% { opacity: 0.35; } }

/* Boot overlay */
.bios-boot {
  position: fixed;
  inset: 0;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  padding: 2ch 3ch;
  z-index: 9999;
  overflow: hidden;
  white-space: pre-wrap;
  cursor: pointer;
  transition: opacity 0.3s;
}

.bios-boot[hidden] { display: none; }
.bios-boot.fading { opacity: 0; pointer-events: none; }
.bios-boot .head { color: var(--highlight); }
.bios-boot .ok { color: #5FFF87; }
.bios-boot .info { color: var(--accent); }
.bios-boot .prompt { color: var(--highlight); }
.bios-boot .cursor { animation: caret 1s steps(1) infinite; }
@keyframes caret { 50% { opacity: 0; } }

/* Cookie consent banner */
.bios-consent {
  position: fixed;
  left: 1ch;
  right: 1ch;
  bottom: 1ch;
  max-width: 96ch;
  margin: 0 auto;
  border: 1px solid var(--highlight);
  background: var(--bg);
  color: var(--fg);
  padding: 0.6ch 1.2ch;
  z-index: 200;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8ch 1.2ch;
  align-items: center;
  font-size: 0.92em;
  box-shadow: 0 0 0 4px var(--bg);
}

.bios-consent .msg {
  flex: 1 1 24ch;
  color: var(--fg);
}

.bios-consent .msg::before { content: "▸ "; color: var(--highlight); }

.bios-consent button {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  padding: 0.1ch 1ch;
  cursor: pointer;
}

.bios-consent button:hover,
.bios-consent button:focus {
  background: var(--select-bg);
  color: var(--select-fg);
  outline: none;
}

.bios-consent a { color: var(--accent); margin-left: auto; }

/* Mobile */
@media (max-width: 640px) {
  html { font-size: 13px; }
  nav.bios-tabs { flex-wrap: wrap; }
  nav.bios-tabs a {
    flex: 1 0 33%;
    border-bottom: 1px solid var(--border);
  }
  nav.bios-tabs a:nth-last-child(-n+3) { border-bottom: none; }
  footer.bios-status .keys { gap: 0.8ch; }
  footer.bios-status .meta { width: 100%; margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cmos.show { animation: none; }
}