/* defaults match the Kanagawa Dragon theme in themes.js;
   applyTheme() overrides these via inline CSS vars on :root */
:root {
  --bg: #181616;
  --bgAlt: #282727;
  --fg: #c5c9c5;
  --muted: #a6a69c;
  --accent: #8ea4a2;
  --red: #c4746e;
  --orange: #b6927b;
  --yellow: #c4b28a;
  --green: #87a987;
  --blue: #658594;
  --purple: #a292a3;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family:
    "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1rem;
  line-height: 1.55;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--bg);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 4px 0;
}
.skip-link:focus {
  left: 0;
}

/* ---------- terminal view ---------- */
#terminal-view {
  min-height: 100vh;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

#output {
  flex: 1;
  white-space: pre-wrap;
  word-break: break-word;
}

#output .entry {
  margin-bottom: 0.15rem;
}
#output .entry:empty {
  height: 1em;
}

#output .prompt-echo {
  color: var(--green);
}
#output .cmd-echo {
  color: var(--fg);
}
#output .error {
  color: var(--red);
}
#output .warn {
  color: var(--yellow);
}
#output .ok {
  color: var(--green);
}

#output a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
#output a:hover,
#output a:focus {
  color: var(--yellow);
}

#output h3 {
  color: var(--yellow);
  margin: 0.5rem 0 0.1rem;
  font-size: 1em;
  font-weight: 700;
}

#output .banner {
  color: var(--accent);
  margin: 0.25rem 0;
  line-height: 1.15;
  max-width: 100%;
  overflow-x: auto;
}

/* ---------- neofetch / ASCII portrait ---------- */
#output .neofetch {
  color: var(--muted);
  margin: 0.25rem 0;
  line-height: 1.15;
  max-width: 100%;
  overflow-x: auto;
}
.art-y {
  color: var(--yellow);
}
.art-f {
  color: var(--fg);
}

#prompt-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  position: relative;
}

.prompt {
  color: var(--green);
  white-space: nowrap;
  flex-shrink: 0;
}

#cmd-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--fg);
  font: inherit;
  padding: 0;
  caret-color: transparent;
  min-width: 0;
}

/* ---------- block caret ---------- */
.block-caret {
  position: absolute;
  background: transparent;
  border: 1px solid var(--fg);
  opacity: 0.7;
  pointer-events: none;
  box-sizing: border-box;
}
#prompt-form:focus-within .block-caret {
  background: var(--fg);
  border: none;
  animation: caret-blink 1s infinite;
}
@keyframes caret-blink {
  0%,
  49% {
    opacity: 0.85;
  }
  50%,
  100% {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  #prompt-form:focus-within .block-caret {
    animation: none;
  }
}

/* ---------- boot sequence fade ---------- */
.boot-line {
  animation: fade-in 0.18s ease both;
}
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(1px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- CRT mode (toggled by the `crt` command) ---------- */
html.crt body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.18) 3px
  );
  animation: crt-flicker 6s infinite;
}
html.crt #terminal-view,
html.crt #standard-view {
  text-shadow: 0 0 4px color-mix(in srgb, currentColor 40%, transparent);
}
@keyframes crt-flicker {
  0%,
  91%,
  94%,
  100% {
    opacity: 1;
  }
  92%,
  93% {
    opacity: 0.8;
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .boot-line {
    animation: none;
  }
  html.crt body::after {
    animation: none;
  }
}

/* ---------- standard (accessible) view ---------- */
#standard-view {
  max-width: 48rem;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
#standard-view h1 {
  color: var(--accent);
  margin: 0.5rem 0 0.25rem;
  outline: none;
}
#standard-view .tagline {
  color: var(--muted);
  margin-top: 0;
}
#standard-view h2 {
  color: var(--yellow);
  border-bottom: 1px solid var(--bgAlt);
  padding-bottom: 0.25rem;
  margin-top: 2rem;
}
#standard-view p[data-about] {
  white-space: pre-wrap;
}
#standard-view a {
  color: var(--accent);
}
#standard-view ul,
#standard-view dl {
  padding-left: 1.25rem;
}
#standard-view dt {
  font-weight: 700;
  margin-top: 0.5rem;
  color: var(--fg);
}
#standard-view dd {
  margin-left: 0;
  color: var(--muted);
}

#back-to-terminal {
  background: var(--bgAlt);
  color: var(--fg);
  border: 1px solid var(--muted);
  padding: 0.4rem 0.8rem;
  font: inherit;
  cursor: pointer;
  border-radius: 4px;
}
#back-to-terminal:hover,
#back-to-terminal:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

/* ---------- deep-dive pages ---------- */
body.page {
  padding: 2rem 1rem;
  max-width: 44rem;
  margin: 0 auto;
  background: var(--bg);
  color: var(--fg);
}
body.page a.back {
  color: var(--muted);
  display: block;
  margin-bottom: 1.5rem;
  text-decoration: none;
}
body.page a.back:hover {
  color: var(--accent);
}
body.page h1 {
  color: var(--accent);
  font-size: 1.6rem;
}
body.page h2 {
  color: var(--yellow);
  font-size: 1.1rem;
  margin-top: 2rem;
}
body.page p,
body.page li {
  line-height: 1.6;
}
body.page pre.diagram {
  background: var(--bgAlt);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  border-radius: 4px;
}
body.page p.numbers {
  color: var(--accent);
  font-weight: bold;
}
body.page a {
  color: var(--accent);
  text-decoration: underline;
}
body.page footer {
  color: var(--muted);
  margin-top: 3rem;
  font-size: 0.85rem;
}

/* ---------- mobile ---------- */
@media (max-width: 600px) {
  html,
  body {
    font-size: 14px;
  }
  #terminal-view {
    padding: 1rem;
  }
  .prompt {
    font-size: 0.9em;
  }
}