:root {
  --paper: #f8f8f8;
  --text: #444444;
  --heading: #535353;
  --blue: #2052bb;
  --yellow: #ebbc3f;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--text);
  font-family: "Courier New", Courier, monospace;
  font-size: 16px;
  line-height: 1.6;
}

.banner {
  background: var(--blue);
  color: var(--paper);
  border-bottom: 4px solid var(--heading);
}

.wrap {
  width: min(100% - 32px, 44rem);
  margin-inline: auto;
}

.banner .wrap {
  padding-block: 24px 22px;
}

.system-name {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  color: inherit;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.25;
  overflow-wrap: anywhere;
}

main { padding-block: 28px 40px; }

.intro {
  max-width: 65ch;
  margin: 0 0 28px;
}

.section-label {
  margin: 28px 0 8px;
  color: var(--heading);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prompt {
  margin: 0 0 12px;
  color: var(--heading);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.directory {
  border-top: 2px solid var(--heading);
  border-bottom: 2px solid var(--heading);
}

.directory a {
  display: block;
  min-height: 48px;
  padding: 12px 8px;
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.directory a + a { border-top: 1px dashed var(--heading); }

/* ---- Windows-file-manager-style directory entries ---- */
.dir-entry {
  display: block;
  padding: 12px 8px;
  color: var(--blue);
  font-weight: 700;
  text-decoration: none;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.dir-entry .sub {
  display: block;
  padding-left: 2ch;
  color: var(--heading);
  font-weight: 400;
  font-size: 13px;
}

.dir-loading, .dir-empty {
  margin: 0;
  padding: 12px 8px;
  color: var(--heading);
}

/* ---- original-source dropdown bank ---- */
.source-bank {
  border: 2px solid var(--heading);
  padding: 10px 8px;
}

.source-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 6px 0;
}

.source-row + .source-row { border-top: 1px dashed var(--heading); }

.source-label {
  flex: 0 0 auto;
  min-width: 21ch;
  color: var(--heading);
  font-weight: 700;
  font-size: 13px;
}

.source-select {
  flex: 1 1 220px;
  min-width: 0;
  font: inherit;
  font-size: 14px;
  padding: 6px 8px;
  border: 2px solid var(--heading);
  background: #fff;
  color: var(--text);
  max-width: 100%;
}

.source-count {
  flex: 0 0 auto;
  color: var(--heading);
  font-size: 12px;
  font-weight: 700;
}

/* ---- source file viewer (DOS dialog) ---- */
.viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(30, 30, 30, 0.55);
  display: grid;
  place-items: center;
  padding: 16px;
}

/* the [hidden] attribute must always win over display:grid above */
.viewer-overlay[hidden] {
  display: none;
}

.viewer-window {
  width: min(900px, 96vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 3px solid var(--heading);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.35);
}

.viewer-titlebar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--blue);
  color: var(--paper);
  font-weight: 700;
}

.viewer-filename {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 14px;
}

.viewer-close {
  flex: 0 0 auto;
  font: inherit;
  font-weight: 700;
  color: var(--heading);
  background: var(--paper);
  border: 2px solid var(--heading);
  padding: 4px 10px;
  cursor: pointer;
}

.viewer-close:hover { background: var(--yellow); }

.viewer-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px 10px;
  border-bottom: 2px solid var(--heading);
  background: #efefef;
}

.viewer-toolbar button {
  font: inherit;
  font-weight: 700;
  color: var(--blue);
  background: #fff;
  border: 2px solid var(--heading);
  padding: 4px 10px;
  cursor: pointer;
}

.viewer-toolbar button:hover { background: var(--blue); color: var(--paper); }

.viewer-pos { color: var(--heading); font-size: 13px; font-weight: 700; }

.viewer-toolbar-gap { flex: 1 1 auto; }

.viewer-dashlink {
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
  text-decoration: none;
  border: 2px dashed var(--blue);
  padding: 3px 8px;
}

.viewer-dashlink:hover { background: var(--blue); color: var(--paper); }

.viewer-body {
  flex: 1 1 auto;
  min-height: 200px;
  overflow: auto;
  background: #fff;
  border-bottom: 2px solid var(--heading);
}

.viewer-text {
  margin: 0;
  padding: 12px;
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.viewer-media {
  display: block;
  max-width: 100%;
  max-height: 60vh;
  margin: 0 auto;
  padding: 10px;
  object-fit: contain;
}

.viewer-audio { display: block; width: calc(100% - 24px); margin: 12px; }

.viewer-statusbar {
  padding: 6px 10px;
  color: var(--heading);
  font-size: 12px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.viewer-statusbar.status-err { color: #9c1c1c; }

body.viewer-open { overflow: hidden; }

a:hover,
a:active {
  background: var(--blue);
  color: var(--paper);
}

a:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 3px;
}

.file-count {
  margin: 8px 0 0;
  color: var(--heading);
  font-size: 13px;
}

.contact {
  margin: 0;
  padding-left: 18px;
}

.contact p { margin: 0; overflow-wrap: anywhere; }

.contact a,
.more-link,
.back-link {
  color: var(--blue);
  font-weight: 700;
  text-underline-offset: 3px;
}

.more-link,
.back-link {
  display: inline-block;
  min-height: 44px;
  padding-block: 8px;
}

.footer {
  margin-top: 32px;
  padding-top: 12px;
  border-top: 2px solid var(--heading);
  color: var(--heading);
  font-size: 13px;
}

@media (max-width: 420px) {
  .wrap { width: min(100% - 24px, 44rem); }
  .banner .wrap { padding-block: 20px; }
  main { padding-block: 24px 32px; }
}