/* Super Retro Time — RetroVision for the web.
   Turbo Vision chrome as RetroVision draws it (tv.ts drawFrame):
     [■] close box at the top-left (light red on blue windows, light green on gray dialogs)
     [↑] zoom box at the top-right — blue windows only, never dialogs
     centred title · double-line frame when active · 1-cell shadow right and below
   CGA colours only (no magenta). Font: PxPlus IBM VGA 9x16 (CC BY-SA 4.0, VileR / int10h.org). */

@font-face { font-family: "IBM VGA"; src: url("../assets/fonts/PxPlus_IBM_VGA_9x16.ttf"); font-display: swap; }

:root {
  --black: #000000; --blue: #0000AA; --green: #00AA00; --cyan: #00AAAA; --red: #AA0000;
  --brown: #AA5500; --lgray: #AAAAAA; --dgray: #555555; --lblue: #5555FF; --lgreen: #55FF55;
  --lcyan: #55FFFF; --lred: #FF5555; --yellow: #FFFF55; --white: #FFFFFF;
  --cell-w: 1ch; --cell-h: 1.5em;           /* one character cell */
  --font: "IBM VGA", "Consolas", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 3em; }
body {
  margin: 0; font: 24px/1.5 var(--font); color: var(--yellow);
  background: var(--blue) url("../assets/desktop-tile.png") 0 0 / 18px 32px;   /* the ░ desktop */
  image-rendering: pixelated;
}
img { max-width: 100%; }
.px { image-rendering: pixelated; }
a { color: var(--lcyan); }
a:hover { color: var(--white); }
::selection { background: var(--green); color: var(--black); }

/* ── menu bar & status line ──────────────────────────────────────────── */
.menubar, .statusbar {
  position: sticky; z-index: 10; display: flex; align-items: center; gap: 2ch;
  background: var(--lgray); color: var(--black); padding: 0 1ch; height: var(--cell-h);
  white-space: nowrap; overflow-x: auto;
}
.menubar { top: 0; }
.statusbar { bottom: 0; }
.menubar a, .statusbar a { color: var(--black); text-decoration: none; padding: 0 1ch; }
.menubar a::first-letter { color: var(--red); }
.menubar a:hover, .menubar a:focus { background: var(--green); outline: none; }
.statusbar b { color: var(--red); font-weight: 400; }
.menubar .clock { margin-left: auto; }

/* ── windows ─────────────────────────────────────────────────────────── */
.tv {
  position: relative; width: min(74ch, 94vw); margin: 2.4em auto;
  background: var(--blue); color: var(--yellow);
  padding: 1.5em 3ch 1.5em;
  box-shadow: var(--cell-w) var(--cell-h) 0 rgba(0, 0, 0, .62);   /* darkened cells right + below */
}
.tv.wide { width: min(100ch, 96vw); }
.tv::before {                                  /* double-line frame on the cell centre line */
  content: ""; position: absolute; inset: .75em calc(var(--cell-w) / 2);
  border: 6px double var(--white); pointer-events: none;
}
.tv > .bar {                                   /* the top border row: [■]  title  [↑] */
  position: absolute; top: 0; left: 1ch; right: 1ch; height: var(--cell-h);
  display: flex; justify-content: space-between; align-items: center; pointer-events: none;
}
.tv > .bar span { background: var(--blue); }
.tv .close { color: var(--lred); }
.tv .zoom { color: var(--lgreen); }
.tv .ttl { color: var(--white); padding: 0 1ch; }
.tv > .grip { position: absolute; bottom: 0; height: var(--cell-h); line-height: var(--cell-h); color: var(--lgreen); background: var(--blue); }
.tv > .grip.l { left: calc(var(--cell-w) / 2 - 1px); }
.tv > .grip.r { right: calc(var(--cell-w) / 2 - 1px); }

.tv.dlg { background: var(--lgray); color: var(--black); }
.tv.dlg > .bar span, .tv.dlg > .grip { background: var(--lgray); }
.tv.dlg .close { color: var(--lgreen); }
.tv.dlg .ttl { color: var(--white); }
.tv.dlg > .grip { color: var(--white); }
.tv.dlg a { color: var(--blue); }

h1, h2, h3 { font-weight: 400; margin: .3em 0 .6em; }
h2 { color: var(--white); font-size: 1em; }
h2::before { content: "► "; color: var(--lcyan); }
.tv.dlg h2 { color: var(--blue); }
h3 { color: var(--lcyan); font-size: 1em; margin-top: 1em; }
p { margin: .4em 0 .9em; }
.white { color: var(--white); }
.cyan { color: var(--lcyan); }

/* ── buttons: green face, yellow hotkey, half-block shadow ───────────── */
.btn, button {
  display: inline-block; font: inherit; color: var(--black); background: var(--green);
  border: 0; padding: 0 2ch; margin: 0 2ch .9em 0; cursor: pointer; text-decoration: none;
  box-shadow: 1ch .5em 0 var(--black); position: relative;
}
.btn::first-letter, button::first-letter { color: var(--yellow); }
.btn:hover, button:hover, .btn:focus, button:focus { color: var(--white); outline: none; }
.btn:active, button:active { transform: translate(1ch, .5em); box-shadow: none; }

/* ── input lines (TInputLine: blue field, white text, yellow when focused) ── */
label { display: block; color: var(--black); }
.tv:not(.dlg) label { color: var(--white); }
input[type=text], input[type=email], textarea {
  width: 100%; font: inherit; color: var(--white); background: var(--blue); border: 0;
  padding: 0 1ch; margin: 0 0 .75em; outline: none;
}
textarea { resize: vertical; min-height: 6em; }
input:focus, textarea:focus { color: var(--yellow); }

/* ── check boxes / radio clusters (cyan cluster, [X] and (•)) ─────────── */
.cluster { background: var(--cyan); color: var(--black); padding: .2em 1ch; display: grid; grid-template-columns: repeat(auto-fill, minmax(28ch, 1fr)); }
.cluster input { position: absolute; opacity: 0; }
.cluster label { color: var(--black); cursor: pointer; margin: 0; }
.cluster input[type=checkbox] + label::before { content: "[ ] "; }
.cluster input[type=checkbox]:checked + label::before { content: "[X] "; color: var(--white); }
.cluster input[type=radio] + label::before { content: "( ) "; }
.cluster input[type=radio]:checked + label::before { content: "(•) "; color: var(--white); }
.cluster input:focus + label { color: var(--white); }

/* ── content bits ────────────────────────────────────────────────────── */
.hero { text-align: center; }
.hero .wordmark { width: min(52ch, 86%); margin: .6em auto .4em; display: block; }
.srt-logo { width: min(40ch, 80%); display: block; margin: .4em auto; }
body.rv #srt > .tv-body { display: flex; align-items: center; justify-content: center; padding: .2em var(--cw); overflow: hidden; }
body.rv #srt .srt-logo { width: 100%; height: 100%; margin: 0; }      /* fills the small window, centred */
.srt-logo .face { animation: srt-cycle 3s steps(1) infinite; }       /* one colour per second */
@keyframes srt-cycle { 0% { stroke: var(--white); } 33.33% { stroke: var(--yellow); } 66.66% { stroke: var(--lcyan); } }
/* SRT.EXE opens like the GenOS boot logo: from the middle row outwards, a pair of tile rows every 4 frames
   (6 steps, 0.4 s), white until the ROM's 100 frames are up (1.67 s), then the colour cycle starts */
.srt-logo.boot { animation: srt-open .4s steps(6, jump-start) both; }
.srt-logo.boot .face { animation-delay: 1.667s; }
@keyframes srt-open { from { clip-path: inset(50% 0 50% 0); } to { clip-path: inset(0 0 0 0); } }
.srt-logo.wait { visibility: hidden; }
@media (prefers-reduced-motion: reduce) { .srt-logo .face, .srt-logo.boot { animation: none; } }
.row { display: flex; gap: 3ch; align-items: flex-end; flex-wrap: wrap; justify-content: center; }
.row figure { margin: 0; text-align: center; }
.row figcaption { color: var(--lcyan); }
.list { list-style: none; padding: 0; margin: 0 0 .9em; }
.list li::before { content: "■ "; color: var(--lcyan); }
.episodes { display: grid; gap: 1.5em 3ch; grid-template-columns: repeat(auto-fill, minmax(30ch, 1fr)); }
.episode { background: var(--cyan); color: var(--black); padding: .5em 2ch; box-shadow: 1ch .75em 0 rgba(0,0,0,.6); }
.episode b { color: var(--white); font-weight: 400; display: block; }
.episode .tag { background: var(--black); color: var(--lcyan); padding: 0 1ch; }
.screen { background: var(--black); color: var(--lgray); padding: .5em 2ch; white-space: pre-wrap; overflow-x: auto; }
.blink { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.note { color: var(--dgray); }

@media (max-width: 760px) {
  body { font-size: 18px; }
  .tv { padding: 1.5em 2ch; }
}

/* ═══════════════════════════════════════════════════════════════════════
   RetroVision Web — desktop mode (js/retrovision-web.js adds body.rv)
   Windows live on a character-cell grid; geometry is set in cells by JS.
═══════════════════════════════════════════════════════════════════════ */
body.rv { overflow: hidden; height: 100vh; }
body.rv .menubar, body.rv .statusbar { position: fixed; left: 0; right: 0; }
#desktop { position: fixed; left: 0; right: 0; top: var(--chh, 36px); bottom: var(--chh, 36px); overflow: hidden; }
body.rv .tv { position: absolute; margin: 0; padding: var(--chh) 0 calc(var(--chh) * .5); display: flex; flex-direction: column;
  box-shadow: var(--cw, 1ch) var(--chh, 1.5em) 0 rgba(0, 0, 0, .62); }
body.rv .tv > .tv-body { flex: 1; min-height: 0; overflow: auto; padding: 0 calc(var(--cw) * 2) .2em; }
body.rv .tv:not(.active)::before { border: 3px solid var(--lgray); inset: calc(var(--chh) / 2) calc(var(--cw) / 2); }
body.rv .tv.dlg:not(.active)::before { border-color: var(--black); }
body.rv .tv:not(.active) .close, body.rv .tv:not(.active) .zoom, body.rv .tv:not(.active) > .grip { visibility: hidden; }
body.rv .tv:not(.active) .ttl { color: var(--lgray); }
body.rv .tv.dragging::before { border: 3px solid var(--lgreen); }
body.rv .tv.dlg.dragging::before { border-color: var(--white); }
body.rv .tv.single::before { border-width: 3px; border-style: solid; }
body.rv .tv.maxed { box-shadow: none; }
body.rv .tv.maxed > .grip { display: none; }
body.rv .tv > .bar { pointer-events: auto; cursor: default; user-select: none; touch-action: none; }
body.rv .tv > .bar .close, body.rv .tv > .bar .zoom { cursor: pointer; }
body.rv .tv > .grip.r { cursor: nwse-resize; touch-action: none; pointer-events: auto; }
body.rv .tv[hidden] { display: none; }
body.rv.dragging-any, body.rv.dragging-any * { user-select: none !important; }

/* Turbo Vision scroll bars inside windows: cyan ▒ track, blue thumb */
body.rv .tv-body::-webkit-scrollbar { width: var(--cw); height: calc(var(--chh) / 1.5); }
body.rv .tv-body::-webkit-scrollbar-track { background: var(--cyan) url("../assets/desktop-tile.png") 0 0 / 18px 32px; }
body.rv .tv-body::-webkit-scrollbar-thumb { background: var(--blue); }
body.rv .tv-body { scrollbar-color: var(--blue) var(--cyan); }

/* drop-down menus (gray box, single black frame, green selection, red hotkeys) */
.rv-menu { position: fixed; z-index: 1000; background: var(--lgray); color: var(--black); padding: .25em 0;
  outline: 3px solid var(--black); outline-offset: -.6em; box-shadow: var(--cw) var(--chh) 0 rgba(0,0,0,.62); min-width: 22ch; }
.rv-menu .mi { display: flex; justify-content: space-between; gap: 3ch; padding: 0 2ch; white-space: nowrap; cursor: default; }
.rv-menu .mi .hk { color: var(--red); }
.rv-menu .mi .sh { color: var(--dgray); }
.rv-menu .mi.sel { background: var(--green); }
.rv-menu .mi.sel .sh { color: var(--lgray); }
.rv-menu .sep { border-top: 3px solid var(--black); margin: .6em 1ch; }
.menubar .mb { cursor: default; padding: 0 1ch; }
.menubar .mb .hk { color: var(--red); }
.menubar .mb.open { background: var(--green); }

/* app widgets */
.rv-row { display: flex; gap: 2ch; align-items: center; flex-wrap: wrap; }
.rv-display { background: var(--blue); color: var(--yellow); text-align: right; padding: 0 1ch; margin: .4em 0 .9em; white-space: pre; overflow: hidden; }
.rv-keys { display: grid; grid-template-columns: repeat(4, 5ch); gap: .5em 1ch; justify-content: center; }
.rv-keys .btn { margin: 0 0 .5em; padding: 0; width: 5ch; text-align: center; }
.rv-pad { width: 100%; height: 100%; resize: none; background: var(--yellow); color: var(--blue); border: 0; font: inherit; padding: 0 1ch; outline: none; margin: 0; }
.rv-note { width: 100%; height: calc(100% - 1.5em); resize: none; background: var(--blue); color: var(--yellow); border: 0; font: inherit; padding: 0; outline: none; margin: 0; }
.rv-status { color: var(--dgray); white-space: nowrap; overflow: hidden; }
.rv-list { background: var(--cyan); color: var(--black); list-style: none; margin: .3em 0 .8em; padding: 0; min-height: 5em; max-height: 14em; overflow: auto; }
.rv-list li { padding: 0 1ch; cursor: default; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rv-list li.sel { background: var(--green); color: var(--white); }
.rv-list li.done { color: var(--dgray); }
.rv-list li.sel.done { color: var(--lgray); }
.rv-canvas { display: block; image-rendering: pixelated; width: 100%; height: auto; background: var(--black); }
.rv-clock { color: var(--lcyan); text-align: center; white-space: pre; line-height: 1.05; margin: .2em 0; }
.rv-puzzle { display: grid; grid-template-columns: repeat(4, 6ch); gap: .4em 1ch; justify-content: center; margin: .3em 0 .9em; }
.rv-puzzle .btn { margin: 0 0 .4em; padding: 0; width: 6ch; text-align: center; }
.rv-puzzle .gap { visibility: hidden; }
.rv-art { white-space: pre; line-height: 1; text-align: center; margin: .2em 0 .6em; }
body.rv .hero .wordmark { width: auto; max-width: 80%; max-height: calc(var(--chh) * 11); }
body.rv .hero p { margin: .2em 0 .5em; }
/* review fixes */
.rv-pad, .rv-pad:focus { color: var(--blue); }                       /* Quick Pad: blue on yellow, as in RetroVision */
body.rv .tv > .bar .ttl { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
body.rv .tv > .bar { overflow: hidden; }
.rv-menu { padding: .75em 0; }