/* ETCS DMI Symbol Catalogue — styled after the DMI colour palette (ERA_ERTMS_015560 §5.1) */

:root {
  --dmi-bg: rgb(3, 17, 34);        /* dark blue background */
  --dmi-panel: rgb(33, 49, 74);    /* PASP dark */
  --dmi-panel2: rgb(41, 74, 107);  /* PASP light */
  --dmi-grey: rgb(195, 195, 195);
  --dmi-medgrey: rgb(150, 150, 150);
  --dmi-darkgrey: rgb(85, 85, 85);
  --dmi-yellow: rgb(223, 223, 0);
  --dmi-orange: rgb(234, 145, 0);
  --dmi-red: rgb(191, 0, 2);
  --dmi-white: #fff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--dmi-bg);
  color: var(--dmi-grey);
  font-family: "Segoe UI", system-ui, sans-serif;
  line-height: 1.45;
}

header.app {
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(180deg, rgba(3,17,34,.97) 80%, rgba(3,17,34,.85));
  border-bottom: 1px solid var(--dmi-panel2);
  padding: 14px 22px 10px;
}

header.app h1 {
  margin: 0 0 2px;
  font-size: 1.35rem;
  color: var(--dmi-white);
  letter-spacing: .02em;
}
header.app h1 .v { color: var(--dmi-yellow); font-weight: 600; font-size: .9rem; margin-left: 8px; }
header.app .sub { margin: 0 0 10px; font-size: .82rem; color: var(--dmi-medgrey); }
header.app .sub a { color: var(--dmi-medgrey); }

.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

#search {
  background: var(--dmi-panel);
  color: var(--dmi-white);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 7px 12px;
  font-size: .92rem;
  width: 270px;
}
#search::placeholder { color: var(--dmi-medgrey); }
#search:focus { outline: 2px solid var(--dmi-panel2); }

#colorSel {
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 7px 8px;
  font-size: .88rem;
}

#count { margin-left: auto; font-size: .85rem; color: var(--dmi-medgrey); white-space: nowrap; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chip {
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 999px;
  padding: 4px 13px;
  font-size: .85rem;
  cursor: pointer;
}
.chip:hover { background: var(--dmi-panel2); }
.chip.active { background: var(--dmi-grey); color: var(--dmi-bg); border-color: var(--dmi-grey); font-weight: 600; }

main { padding: 18px 22px 40px; max-width: 1500px; margin: 0 auto; }

.cat-head { grid-column: 1 / -1; margin: 18px 0 2px; }
.cat-head h2 { margin: 0; color: var(--dmi-white); font-size: 1.12rem; border-bottom: 1px solid var(--dmi-panel2); padding-bottom: 4px; }
.cat-head p { margin: 6px 0 4px; font-size: .85rem; color: var(--dmi-medgrey); max-width: 1000px; }

#grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
  gap: 12px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  background: var(--dmi-bg);
  border: 1px solid var(--dmi-panel);
  border-radius: 8px;
  padding: 0;
  cursor: pointer;
  text-align: left;
  color: inherit;
  font: inherit;
  transition: border-color .12s, transform .12s;
  overflow: hidden;
}
.card:hover { border-color: var(--dmi-grey); transform: translateY(-2px); }

.card-img {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 96px;
  background: var(--dmi-bg);
  border-bottom: 1px solid var(--dmi-panel);
}
.card-img img { image-rendering: pixelated; }

.noimg { color: var(--dmi-darkgrey); font-size: .78rem; text-align: center; }
.noimg.big { font-size: .95rem; display: inline-block; padding: 30px 10px; }

.card-meta { padding: 8px 10px 10px; display: flex; flex-direction: column; gap: 2px; }
.sym-id { color: var(--dmi-yellow); font-weight: 700; font-size: .82rem; letter-spacing: .04em; }
.sym-name { color: var(--dmi-white); font-size: .88rem; }
.sym-area { color: var(--dmi-medgrey); font-size: .76rem; }

.empty { color: var(--dmi-medgrey); }

/* ---------- detail dialog ---------- */
dialog#detail {
  background: var(--dmi-bg);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 10px;
  padding: 0;
  width: min(960px, 94vw);
  max-height: 92vh;
}
dialog#detail::backdrop { background: rgba(0, 0, 0, .65); }

.detail-wrap { padding: 20px 24px 26px; overflow-y: auto; max-height: 92vh; }

#detailClose {
  position: sticky;
  top: 0;
  float: right;
  background: var(--dmi-panel);
  color: var(--dmi-white);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  font-size: 1rem;
  padding: 4px 12px;
  cursor: pointer;
}
#detailClose:hover { background: var(--dmi-panel2); }

.detail-top { display: flex; gap: 22px; align-items: flex-start; flex-wrap: wrap; }
.detail-imgs { display: flex; gap: 14px; align-items: flex-start; flex-wrap: wrap; }
.detail-img { image-rendering: pixelated; display: block; }
.detail-imgs figure.extra { margin: 0; text-align: center; }
.detail-imgs figcaption { font-size: .72rem; color: var(--dmi-medgrey); margin-top: 4px; }

.detail-id h2 { margin: 0; color: var(--dmi-yellow); font-size: 1.5rem; }
.detail-id h3 { margin: 2px 0 8px; color: var(--dmi-white); font-weight: 600; font-size: 1.08rem; }
.tags { margin: 0; }

.badge {
  display: inline-block;
  background: var(--dmi-panel);
  border: 1px solid var(--dmi-panel2);
  color: var(--dmi-grey);
  border-radius: 5px;
  font-size: .75rem;
  padding: 2px 8px;
  margin: 0 6px 4px 0;
  vertical-align: middle;
}
.badge.cat { color: var(--dmi-white); }
.badge.legacy { background: var(--dmi-red); color: var(--dmi-white); border-color: var(--dmi-red); }
.badge.c-yellow { color: var(--dmi-yellow); }
.badge.c-red { color: rgb(255, 96, 96); }
.badge.c-white { color: var(--dmi-white); }
.badge.c-darkgrey { color: var(--dmi-medgrey); }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 26px; margin-top: 14px; }
@media (max-width: 760px) { .detail-grid { grid-template-columns: 1fr; } }

.detail-grid h4 {
  margin: 12px 0 4px;
  color: var(--dmi-white);
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .07em;
}
.detail-grid p, .detail-grid ul { margin: 4px 0; font-size: .92rem; }
.detail-grid ul { padding-left: 20px; }
.detail-grid li { margin: 2px 0; }

.dmi-map { width: 100%; max-width: 420px; margin-top: 8px; border-radius: 4px; }
.map-bg { fill: rgb(2, 10, 20); }
.map-area { fill: var(--dmi-bg); stroke: var(--dmi-panel2); stroke-width: 1.5; }
.map-dial { fill: none; stroke: var(--dmi-panel2); stroke-width: 1.5; stroke-dasharray: 4 4; }
.map-label { fill: var(--dmi-darkgrey); font-size: 15px; font-family: inherit; }
.map-hl { fill: rgba(223, 223, 0, .35); stroke: var(--dmi-yellow); stroke-width: 2; }
.map-hl-label { fill: var(--dmi-yellow); font-size: 13px; text-anchor: middle; font-weight: 700; }
.map-note { font-size: .74rem; color: var(--dmi-medgrey); }

/* ---------- sounds ---------- */
#soundsSection { margin-top: 36px; border-top: 1px solid var(--dmi-panel2); padding-top: 14px; }
#soundsSection h2 { color: var(--dmi-white); font-size: 1.12rem; margin: 0 0 4px; }
#soundsSection > p { color: var(--dmi-medgrey); font-size: .85rem; margin-top: 0; }

#sounds { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 12px; }
.sound {
  display: flex;
  gap: 12px;
  background: var(--dmi-bg);
  border: 1px solid var(--dmi-panel);
  border-radius: 8px;
  padding: 12px;
}
.sound .play {
  flex: 0 0 auto;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--dmi-panel);
  color: var(--dmi-yellow);
  border: 1px solid var(--dmi-panel2);
  font-size: 1rem;
  cursor: pointer;
}
.sound .play:hover { background: var(--dmi-panel2); }
.sound-meta b { color: var(--dmi-white); margin-right: 6px; }
.sound-meta p { margin: 4px 0 0; font-size: .85rem; color: var(--dmi-grey); }

footer {
  padding: 18px 22px 30px;
  font-size: .78rem;
  color: var(--dmi-medgrey);
  border-top: 1px solid var(--dmi-panel);
  text-align: center;
}
footer a { color: var(--dmi-grey); }

/* ---------- language switch ---------- */
.lang-switch { float: right; margin-top: 2px; }
.lang-btn {
  background: var(--dmi-panel);
  color: var(--dmi-medgrey);
  border: 1px solid var(--dmi-panel2);
  padding: 3px 10px;
  font-size: .8rem;
  cursor: pointer;
}
.lang-btn:first-child { border-radius: 6px 0 0 6px; }
.lang-btn:last-child { border-radius: 0 6px 6px 0; border-left: none; }
.lang-btn.active { background: var(--dmi-grey); color: var(--dmi-bg); font-weight: 700; }

/* ---------- related symbols ---------- */
.rel-group { margin: 6px 0 10px; }
.rel-label { display: block; font-size: .78rem; color: var(--dmi-medgrey); margin-bottom: 4px; }
.rel-row { display: flex; flex-wrap: wrap; gap: 6px; }
.rel-thumb {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  background: var(--dmi-bg);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
  min-width: 56px;
}
.rel-thumb:hover { border-color: var(--dmi-grey); }
.rel-thumb img { image-rendering: pixelated; max-width: 48px; max-height: 36px; }
.rel-thumb span { color: var(--dmi-yellow); font-size: .72rem; font-weight: 700; letter-spacing: .03em; }

/* ---------- quiz ---------- */
.quiz-launch {
  background: var(--dmi-panel);
  color: var(--dmi-yellow);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 7px 14px;
  font-size: .92rem;
  cursor: pointer;
  font-weight: 600;
}
.quiz-launch:hover { background: var(--dmi-panel2); }

dialog#quiz {
  background: var(--dmi-bg);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 10px;
  padding: 0;
  width: min(620px, 94vw);
}
dialog#quiz::backdrop { background: rgba(0, 0, 0, .65); }
.quiz-wrap { padding: 20px 24px 26px; }
#quizClose {
  float: right;
  background: var(--dmi-panel);
  color: var(--dmi-white);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
#quizClose:hover { background: var(--dmi-panel2); }

#quizBody h2 { margin: 0 0 12px; color: var(--dmi-white); font-size: 1.2rem; }
.quiz-setup { display: flex; flex-wrap: wrap; gap: 14px 20px; margin: 14px 0; }
.quiz-setup label { font-size: .85rem; color: var(--dmi-medgrey); }
.quiz-setup select {
  margin-top: 4px;
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: .9rem;
  min-width: 180px;
  max-width: 100%;
}
.quiz-note { font-size: .82rem; color: var(--dmi-medgrey); }
.quiz-actions { margin-top: 16px; display: flex; gap: 10px; }
.qbtn {
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 8px 18px;
  font-size: .95rem;
  cursor: pointer;
}
.qbtn:hover { background: var(--dmi-panel2); }
.qbtn.primary { background: var(--dmi-grey); color: var(--dmi-bg); font-weight: 700; border-color: var(--dmi-grey); }
.qbtn.primary:hover { background: var(--dmi-white); }

.quiz-head { display: flex; justify-content: space-between; font-size: .85rem; color: var(--dmi-medgrey); margin-bottom: 10px; }
.quiz-head b { color: var(--dmi-yellow); }
.quiz-symbol { display: flex; justify-content: center; align-items: center; min-height: 120px; border: 1px solid var(--dmi-panel); border-radius: 8px; }
.quiz-symbol img { image-rendering: pixelated; }
.quiz-q { color: var(--dmi-white); font-size: 1.02rem; margin: 12px 0 8px; }
.quiz-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
@media (max-width: 560px) { .quiz-opts { grid-template-columns: 1fr; } }
.qopt {
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: .9rem;
  text-align: left;
  cursor: pointer;
}
.qopt:hover:not(:disabled) { background: var(--dmi-panel2); color: var(--dmi-white); }
.qopt.correct { background: #14501e; border-color: #2d9e42; color: var(--dmi-white); }
.qopt.wrong { background: #58120f; border-color: var(--dmi-red); color: var(--dmi-white); }
.qopt:disabled { cursor: default; opacity: .9; }
.fb-ok { color: #4ed368; margin: 12px 0 4px; }
.fb-bad { color: #ff7a72; margin: 12px 0 4px; }
.fb-when { font-size: .84rem; color: var(--dmi-medgrey); margin: 4px 0 0; }
.quiz-result { font-size: 1.25rem; color: var(--dmi-yellow); font-weight: 700; }
.quiz-missed { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }

/* ---------- system status messages (chapter 15) ---------- */
#msgsSection { margin-top: 36px; border-top: 1px solid var(--dmi-panel2); padding-top: 14px; }
#msgsSection h2 { color: var(--dmi-white); font-size: 1.12rem; margin: 0 0 4px; }
#msgsSection > p { color: var(--dmi-medgrey); font-size: .85rem; margin-top: 0; max-width: 1000px; }
.msg-toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
#msgSearch {
  background: var(--dmi-panel);
  color: var(--dmi-white);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 7px 12px;
  width: min(380px, 100%);
  font-size: .9rem;
}
#msgSearch::placeholder { color: var(--dmi-medgrey); }
#msgSearch:focus { outline: 2px solid var(--dmi-panel2); }
#msgCount { margin-left: auto; font-size: .85rem; color: var(--dmi-medgrey); white-space: nowrap; }
#msgList { display: grid; grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); gap: 12px; align-items: start; }
@media (max-width: 480px) { #msgList { grid-template-columns: 1fr; } }
.msg {
  background: var(--dmi-bg);
  border: 1px solid var(--dmi-panel);
  border-radius: 8px;
  padding: 12px 14px;
}
.msg-head { display: flex; flex-wrap: wrap; gap: 6px 10px; align-items: baseline; }
.msg-text { color: var(--dmi-white); font-weight: 700; font-size: .98rem; }
.msg-orig { color: var(--dmi-medgrey); font-size: .8rem; font-style: italic; }
.badge.ack { color: var(--dmi-yellow); border-color: var(--dmi-yellow); }
.msg-meaning { margin: 8px 0 6px; font-size: .86rem; color: var(--dmi-grey); }
.msg details summary { cursor: pointer; font-size: .8rem; color: var(--dmi-medgrey); }
.msg-table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: .78rem; }
.msg-table th, .msg-table td {
  border: 1px solid var(--dmi-panel);
  padding: 4px 8px;
  text-align: left;
  vertical-align: top;
  color: var(--dmi-grey);
}
.msg-table th { background: var(--dmi-panel); color: var(--dmi-white); font-weight: 600; }

/* ---------- area map dialog (reverse lookup) ---------- */
dialog#areamap {
  background: var(--dmi-bg);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 10px;
  padding: 0;
  width: min(720px, 94vw);
}
dialog#areamap::backdrop { background: rgba(0, 0, 0, .65); }
.map-dlg-wrap { padding: 20px 24px 26px; max-height: 88vh; overflow-y: auto; }
.map-dlg-wrap h2 { color: var(--dmi-white); font-size: 1.12rem; margin: 0 0 4px; }
.map-hint { color: var(--dmi-medgrey); font-size: .84rem; margin-top: 0; }
#mapClose {
  float: right;
  background: var(--dmi-panel);
  color: var(--dmi-white);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
#areaMapHolder .dmi-map { max-width: 100%; }
.map-pick { fill: transparent; stroke: transparent; cursor: pointer; }
.map-pick:hover { fill: rgba(195, 195, 195, .25); stroke: var(--dmi-grey); stroke-width: 1.5; }
.map-pick.sel { fill: rgba(223, 223, 0, .35); stroke: var(--dmi-yellow); stroke-width: 2; }
.area-other { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 10px; }
#areaResult { margin-top: 14px; }
#areaResult h3 { color: var(--dmi-white); font-size: .98rem; margin: 0 0 8px; }
.map-pick-hint { color: var(--dmi-medgrey); font-size: .85rem; }
.area-row { flex-wrap: wrap; }

/* ---------- quiz map-click questions ---------- */
.quiz-map { margin-top: 6px; }
.quiz-map .dmi-map { max-width: 100%; }
.quiz-map .dmi-map.done .map-pick { pointer-events: none; }
.map-pick.ok { fill: rgba(40, 160, 60, .45); stroke: #3dbf57; stroke-width: 2; }
.map-pick.bad { fill: rgba(191, 0, 2, .5); stroke: var(--dmi-red); stroke-width: 2; }

/* ---------- phone layout: compact, collapsible header ---------- */
/* header.app is sticky, so at phone width its full-size layout (wrapped title,
   sub-heading, three toolbar rows and five rows of chips) covered over half the
   screen with no way to dismiss it. On a narrow screen — or a short one, which is
   the same phone held in landscape — it is compacted, and the filters collapse
   away behind #filtersToggle. Desktop layout is untouched. */

.filters-toggle {
  display: none;
  float: right;
  margin: 2px 8px 0 0;
  background: var(--dmi-panel);
  color: var(--dmi-grey);
  border: 1px solid var(--dmi-panel2);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: .8rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}
.filters-toggle:hover { background: var(--dmi-panel2); }

@media (max-width: 640px), (max-height: 480px) {
  header.app { padding: 8px 12px; }
  /* the floated controls hang out of the h1 and squeeze the toolbar's first row,
     so the title row becomes a flex row instead: title, controls pushed hard
     right, and the spec version wrapped onto a line of its own */
  header.app h1 {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 2px 8px;
    font-size: 1.02rem;
    line-height: 1.3;
  }
  header.app h1 .v { order: 3; flex: 1 1 100%; margin-left: 0; font-size: .72rem; font-weight: 500; }
  header.app .sub { display: none; }

  .filters-toggle { display: inline-block; float: none; order: 1; margin: 0 0 0 auto; }
  /* margin-left:auto on both keeps them flush right, stacked when they wrap */
  .lang-switch { float: none; order: 2; margin: 0 0 0 auto; }

  .toolbar { gap: 6px; margin-top: 8px; }
  /* the fixed 270px is what forced the toolbar onto three rows and clipped the
     placeholder; let search and the colour filter share the first row instead */
  #search { width: auto; flex: 1 1 150px; min-width: 0; }
  #colorSel { flex: 1 1 105px; min-width: 0; }
  /* 16px stops iOS Safari zooming the page in when a field takes focus */
  #search, #colorSel { font-size: 16px; }

  /* one horizontally scrolling row instead of five wrapped ones */
  .chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .chips::-webkit-scrollbar { display: none; }
  .chips .chip { flex: 0 0 auto; white-space: nowrap; }

  header.app.collapsed .toolbar,
  header.app.collapsed .chips { display: none; }
}