/* Finite State Machine Simulator - Quartex Pascal edition.
   Colours follow the Office 2003 (TBX) theme used by the Delphi original. */

:root {
  --bar-1: #e3effe; --bar-2: #9ebef5;
  --menu-1: #f6f9ff; --menu-2: #c4daf8;
  --panel: #dbe7fb; --panel-dark: #a8c3ef; --edge: #6f93cf; --edge-soft: #b9cdee;
  --hot-1: #fff4cf; --hot-2: #ffd88d; --hot-edge: #c28a30;
  --down-1: #fdd59a; --down-2: #f8a54a;
  --ink: #1b2a44; --muted: #4c5d7a; --accent: #1e5bc6; --danger: #b3261e;
  --canvas: #ffffff; --grid: #eef3fb;
  --font: "Segoe UI", Tahoma, Verdana, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--panel); color: var(--ink); font: 13px/1.35 var(--font); }

#fsm-app { position: fixed; inset: 0; display: flex; flex-direction: column; z-index: 10; background: var(--panel); }
#fsm-app button, #fsm-app input, #fsm-app select, #fsm-app textarea { font: inherit; color: inherit; }

/* ---------- menu bar ---------- */
.fsm-menubar { display: flex; align-items: stretch; gap: 1px; padding: 2px 4px; background: linear-gradient(var(--bar-1), var(--bar-2)); border-bottom: 1px solid var(--edge); user-select: none; position: relative; z-index: 30; }
.fsm-menubar .fsm-brand { display: flex; align-items: center; gap: 6px; margin-right: 10px; font-weight: 600; white-space: nowrap; }
.fsm-menubar .fsm-brand img { width: 20px; height: 20px; }
.fsm-menu { position: relative; }
.fsm-menu > button { border: 1px solid transparent; background: none; padding: 3px 9px; border-radius: 2px; cursor: default; }
.fsm-menu > button:hover, .fsm-menu.open > button { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.fsm-menu.open > button { background: linear-gradient(#fbfdff, var(--menu-2)); border-color: var(--edge); border-bottom-color: transparent; }
.fsm-dropdown { display: none; position: absolute; top: 100%; left: 0; min-width: 236px; padding: 2px; background: #fbfcff; border: 1px solid var(--edge); box-shadow: 3px 3px 6px rgba(20, 40, 90, .25); }
.fsm-menu.open .fsm-dropdown { display: block; }
.fsm-dropdown button { display: flex; width: 100%; align-items: center; gap: 8px; padding: 4px 8px 4px 4px; border: 1px solid transparent; background: none; text-align: left; cursor: default; }
.fsm-dropdown button .ico { width: 22px; height: 18px; display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(90deg, var(--menu-1), var(--menu-2)); margin: -4px 4px -4px -4px; padding: 0 2px; }
.fsm-dropdown button .ico img { width: 16px; height: 16px; }
.fsm-dropdown button .key { margin-left: auto; color: var(--muted); padding-left: 20px; font-size: 12px; }
.fsm-dropdown button:hover:not(:disabled) { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.fsm-dropdown button:disabled { color: #9aa6ba; }
.fsm-dropdown button:disabled img { opacity: .4; }
.fsm-dropdown button.checked .ico { background: linear-gradient(var(--down-1), var(--down-2)); outline: 1px solid var(--hot-edge); }
.fsm-dropdown hr { border: 0; border-top: 1px solid var(--edge-soft); margin: 2px 2px 2px 28px; }
.fsm-dropdown .fsm-sub { font-size: 11px; color: var(--muted); padding: 4px 8px 2px 30px; text-transform: uppercase; letter-spacing: .04em; }

/* ---------- toolbars ---------- */
.fsm-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; padding: 3px 6px; background: linear-gradient(var(--bar-1), var(--bar-2)); border-bottom: 1px solid var(--edge); }
.fsm-toolbar .sep { width: 1px; align-self: stretch; margin: 2px 4px; background: var(--edge); box-shadow: 1px 0 #fff; }
.tb { display: inline-flex; align-items: center; gap: 4px; min-height: 26px; padding: 2px 6px; border: 1px solid transparent; border-radius: 2px; background: none; cursor: default; white-space: nowrap; }
.tb img { width: 16px; height: 16px; image-rendering: auto; }
.tb.big img { width: 20px; height: 20px; }
.tb:hover:not(:disabled) { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.tb.checked, .tb:active:not(:disabled) { background: linear-gradient(var(--down-1), var(--down-2)); border-color: var(--hot-edge); }
.tb:disabled { opacity: .45; }
.tb:focus-visible, .fsm-dropdown button:focus-visible, .fsm-menu > button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.fsm-simbar { display: none; align-items: center; gap: 6px; padding: 4px 8px; background: linear-gradient(#fff7dd, #ffe2a1); border-bottom: 1px solid var(--hot-edge); }
.fsm-simbar.show { display: flex; flex-wrap: wrap; }
.fsm-simbar .word { font: 600 17px/1.2 Consolas, "Courier New", monospace; background: #fff; border: 1px solid var(--hot-edge); padding: 3px 8px; min-width: 120px; letter-spacing: .08em; white-space: pre; }
.fsm-simbar .word .done { color: #d01818; }
.fsm-simbar .word .cur { background: #ffe066; outline: 1px solid #c79a00; }
.fsm-simbar .word .empty { color: var(--muted); font-weight: 400; letter-spacing: 0; font-family: var(--font); font-size: 13px; }
.fsm-simbar label { display: inline-flex; align-items: center; gap: 6px; }
.fsm-simbar .out { font-family: Consolas, monospace; }

/* ---------- main area ---------- */
.fsm-main { flex: 1; display: flex; min-height: 0; }
.fsm-toolbox { width: 112px; flex: none; padding: 6px 4px; background: linear-gradient(90deg, var(--menu-1), var(--panel)); border-right: 1px solid var(--edge); overflow: auto; }
.fsm-toolbox h3 { margin: 6px 4px 4px; font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.fsm-toolbox .tb { display: flex; width: 100%; padding: 4px 6px; gap: 6px; }
.fsm-toolbox .tb img { width: 22px; height: 22px; }
.fsm-toolbox .row { display: flex; gap: 2px; }
.fsm-toolbox .row .tb { width: auto; flex: 1; justify-content: center; padding: 4px 2px; }
.fsm-toolbox .row .tb img { width: 16px; height: 16px; }

.fsm-work { flex: 1 1 0; min-width: 0; min-height: 0; display: flex; flex-direction: column; background: #8aa9da; }
.fsm-tabs { display: flex; gap: 2px; padding: 4px 6px 0; background: linear-gradient(var(--panel-dark), #8aa9da); overflow-x: auto; flex: none; }
.fsm-tab { display: flex; align-items: center; gap: 6px; padding: 4px 6px 4px 10px; border: 1px solid var(--edge); border-bottom: 0; border-radius: 4px 4px 0 0; background: linear-gradient(#f2f7ff, #c9dbf6); white-space: nowrap; max-width: 260px; cursor: default; }
.fsm-tab.active { background: #fff; font-weight: 600; }
.fsm-tab .t { overflow: hidden; text-overflow: ellipsis; }
.fsm-tab .x { border: 0; background: none; padding: 0 4px; border-radius: 2px; line-height: 1; font-size: 15px; }
.fsm-tab .x:hover { background: #e9b9b5; color: var(--danger); }
.fsm-canvas { flex: 1; overflow: auto; background: #fff; position: relative; outline: none; }
.fsm-canvas.empty { background: #8aa9da; display: flex; align-items: center; justify-content: center; }
.fsm-welcome { max-width: 520px; background: #fff; border: 1px solid var(--edge); padding: 22px 26px; box-shadow: 0 4px 18px rgba(20, 40, 90, .25); }
.fsm-welcome h1 { margin: 0 0 6px; font-size: 20px; display: flex; align-items: center; gap: 10px; }
.fsm-welcome h1 img { width: 40px; height: 40px; }
.fsm-welcome p { margin: 6px 0; color: var(--muted); }
.fsm-welcome .actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.fsm-canvas svg { display: block; background: var(--canvas); touch-action: none; user-select: none; }
.fsm-canvas svg text { font-family: "Segoe UI", Tahoma, sans-serif; }
.fsm-canvas.tool-select [data-state], .fsm-canvas.tool-select [data-label] { cursor: move; }
.fsm-canvas.tool-select [data-trans] { cursor: pointer; }
.fsm-canvas.tool-select [data-handle] { cursor: grab; }
.fsm-canvas.tool-state svg { cursor: crosshair; }
.fsm-canvas.tool-transition [data-state] { cursor: alias; }
.fsm-canvas.tool-label svg { cursor: text; }
.fsm-canvas.tool-delete [data-state], .fsm-canvas.tool-delete [data-trans], .fsm-canvas.tool-delete [data-label] { cursor: not-allowed; }
.fsm-canvas.simulating svg { cursor: default; }

.fsm-status { display: flex; align-items: stretch; flex: none; background: linear-gradient(var(--bar-1), var(--bar-2)); border-top: 1px solid var(--edge); font-size: 12px; }
.fsm-status > * { padding: 3px 10px; border-right: 1px solid var(--edge-soft); white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.fsm-status button { border: 1px solid transparent; background: none; padding: 0 4px; cursor: pointer; }
.fsm-status button:hover { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.fsm-status .word { font-family: Consolas, monospace; }
.fsm-status .grow { flex: 1; color: var(--muted); overflow: hidden; text-overflow: ellipsis; }

/* ---------- side panel ---------- */
.fsm-side { width: 270px; flex: none; overflow: auto; background: linear-gradient(90deg, var(--panel), var(--menu-1)); border-left: 1px solid var(--edge); }
.fsm-side section { margin: 6px; background: #fff; border: 1px solid var(--edge-soft); border-radius: 3px; }
.fsm-side h2 { margin: 0; padding: 5px 8px; font-size: 12px; font-weight: 700; color: #fff; background: linear-gradient(#5c8bd9, #2f5fb3); border-radius: 2px 2px 0 0; display: flex; align-items: center; justify-content: space-between; }
.fsm-side .body { padding: 6px 8px 8px; }
.fsm-side .link { display: flex; align-items: center; gap: 6px; width: 100%; padding: 3px 4px; border: 1px solid transparent; background: none; text-align: left; cursor: pointer; color: var(--accent); }
.fsm-side .link img { width: 16px; height: 16px; flex: none; }
.fsm-side .link span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fsm-side .link:hover { text-decoration: underline; background: #eef4ff; }
.fsm-side .group { margin: 6px 0 2px; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.fsm-side .note { color: var(--muted); font-size: 12px; margin: 4px 0; }
.fsm-side .empty { color: var(--muted); font-style: italic; }
.fsm-props label { display: flex; align-items: center; gap: 6px; margin: 5px 0; }
.fsm-props label > span:first-child { width: 72px; flex: none; color: var(--muted); }
.fsm-props input[type=text], .fsm-props select { flex: 1; min-width: 0; padding: 3px 5px; border: 1px solid var(--edge-soft); border-radius: 2px; background: #fff; }
.fsm-props input.ch { width: 42px; flex: none; text-align: center; font-family: Consolas, monospace; }
.fsm-props input[type=range] { flex: 1; }
.fsm-props .fmt { display: flex; gap: 2px; }
.fsm-props .fmt .tb { min-height: 22px; padding: 1px 4px; border-color: var(--edge-soft); }
.fsm-props .actions { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.fsm-props .kv { display: grid; grid-template-columns: auto 1fr; gap: 2px 8px; }
.fsm-props .kv dt { color: var(--muted); }
.fsm-props .kv dd { margin: 0; }
.btn { padding: 4px 10px; border: 1px solid var(--edge); border-radius: 3px; background: linear-gradient(#fdfeff, #d6e4fa); cursor: pointer; }
.btn:hover:not(:disabled) { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.btn.primary { font-weight: 600; border-color: #2c58a6; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: .5; cursor: default; }
.fsm-trace { margin: 0; padding: 0 0 0 20px; max-height: 220px; overflow: auto; font-size: 12px; }
.fsm-trace li { margin: 1px 0; }
.fsm-trace li:last-child { font-weight: 600; }

/* ---------- dialogs ---------- */
.fsm-overlay { position: fixed; inset: 0; background: rgba(20, 35, 70, .28); display: flex; align-items: center; justify-content: center; z-index: 100; padding: 16px; }
.fsm-dialog { min-width: 320px; max-width: min(640px, 100%); max-height: calc(100vh - 32px); display: flex; flex-direction: column; background: #f4f8ff; border: 1px solid #3c66b4; border-radius: 6px; box-shadow: 0 10px 34px rgba(10, 25, 60, .45); }
.fsm-dialog .title { padding: 7px 12px; font-weight: 600; color: #fff; background: linear-gradient(#5f90e0, #2b59ad); border-radius: 5px 5px 0 0; display: flex; align-items: center; gap: 8px; }
.fsm-dialog .title img { width: 16px; height: 16px; }
.fsm-dialog .content { padding: 14px 16px; overflow: auto; }
.fsm-dialog .content p { margin: 0 0 10px; }
.fsm-dialog .buttons { display: flex; justify-content: flex-end; gap: 6px; padding: 8px 12px 12px; }
.fsm-dialog .buttons .btn { min-width: 80px; }
.fsm-dialog .msg { display: flex; gap: 12px; align-items: flex-start; }
.fsm-dialog .msg .icon { flex: none; width: 32px; height: 32px; border-radius: 50%; color: #fff; display: flex; align-items: center; justify-content: center; font: 700 18px/1 var(--font); }
.fsm-dialog .msg .icon.error { background: #d13a2f; }
.fsm-dialog .msg .icon.info { background: #2e6bd3; }
.fsm-dialog .msg .icon.ok { background: #2e9c4a; }
.fsm-dialog .msg .icon.warn { background: #d99a17; }
.fsm-dialog fieldset { border: 1px solid var(--edge-soft); border-radius: 3px; margin: 0 0 10px; padding: 6px 10px 8px; }
.fsm-dialog legend { padding: 0 4px; color: var(--muted); }
.fsm-dialog label.opt { display: flex; align-items: center; gap: 6px; margin: 4px 0; }
.fsm-dialog label.opt.dis { color: #9aa6ba; }
.fsm-dialog .field { display: flex; align-items: center; gap: 8px; margin: 6px 0; }
.fsm-dialog .field > span:first-child { min-width: 110px; color: var(--muted); }
.fsm-dialog input[type=text], .fsm-dialog input[type=number], .fsm-dialog select, .fsm-dialog textarea { padding: 4px 6px; border: 1px solid var(--edge); border-radius: 2px; background: #fff; }
.fsm-dialog input.ch { width: 48px; text-align: center; font-family: Consolas, monospace; font-size: 15px; }
.fsm-dialog input.wide, .fsm-dialog textarea { width: 100%; }
.fsm-dialog .set { display: inline-flex; align-items: center; gap: 4px; font-family: Consolas, monospace; font-size: 15px; }
.fsm-dialog .err { color: var(--danger); min-height: 1.2em; margin: 6px 0 0; }
.fsm-dialog .hint { color: var(--muted); font-size: 12px; }
.fsm-dialog .tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--edge); margin-bottom: 10px; }
.fsm-dialog .tabs button { border: 1px solid var(--edge-soft); border-bottom: 0; background: #e5eefc; padding: 4px 10px; border-radius: 3px 3px 0 0; }
.fsm-dialog .tabs button.on { background: #fff; border-color: var(--edge); font-weight: 600; }
.fsm-dialog .page { display: none; }
.fsm-dialog .page.on { display: block; }
.fsm-dialog .colours { display: grid; grid-template-columns: auto auto auto; gap: 6px 12px; align-items: center; }
.fsm-dialog .colours input[type=color] { width: 46px; height: 26px; padding: 0 2px; border: 1px solid var(--edge); }
.fsm-dialog table.keys { border-collapse: collapse; }
.fsm-dialog table.keys td { padding: 3px 10px 3px 0; border-bottom: 1px solid #e1e8f5; }
.fsm-dialog kbd { font: 12px Consolas, monospace; padding: 1px 5px; border: 1px solid #a9b8d6; border-bottom-width: 2px; border-radius: 3px; background: #fff; }
.fsm-about { display: flex; gap: 14px; align-items: flex-start; }
.fsm-about img { width: 64px; height: 64px; }
.fsm-about h3 { margin: 0 0 4px; }

/* ---------- context menu ---------- */
.fsm-context { position: fixed; display: none; z-index: 90; min-width: 200px; padding: 2px; background: #fbfcff; border: 1px solid var(--edge); box-shadow: 3px 3px 6px rgba(20, 40, 90, .25); }
.fsm-context.show { display: block; }
.fsm-context button { display: flex; width: 100%; gap: 8px; align-items: center; padding: 4px 10px 4px 4px; border: 1px solid transparent; background: none; text-align: left; }
.fsm-context button .ico { width: 22px; display: inline-flex; justify-content: center; }
.fsm-context button .ico img { width: 16px; height: 16px; }
.fsm-context button.checked .ico { background: linear-gradient(var(--down-1), var(--down-2)); outline: 1px solid var(--hot-edge); }
.fsm-context button:hover:not(:disabled) { background: linear-gradient(var(--hot-1), var(--hot-2)); border-color: var(--hot-edge); }
.fsm-context button:disabled { color: #9aa6ba; }
.fsm-context hr { border: 0; border-top: 1px solid var(--edge-soft); margin: 2px; }

/* ---------- print ---------- */
.fsm-print { display: none; }
@media print {
  @page { margin: 12mm; }
  html, body { background: #fff; height: auto; }
  #fsm-app { position: static; display: block; background: #fff; }
  #fsm-app > *:not(.fsm-print) { display: none !important; }
  .fsm-print { display: block; }
  .fsm-print .hf { display: grid; grid-template-columns: 1fr 1fr 1fr; font-size: 11px; color: #333; }
  .fsm-print .hf span:nth-child(2) { text-align: center; }
  .fsm-print .hf span:nth-child(3) { text-align: right; }
  .fsm-print .hf.head { border-bottom: 1px solid #999; padding-bottom: 3px; margin-bottom: 8px; }
  .fsm-print .hf.foot { border-top: 1px solid #999; padding-top: 3px; margin-top: 8px; }
  .fsm-print svg { width: 100%; height: auto; max-height: 240mm; }
}

/* ---------- narrow screens ---------- */
@media (max-width: 980px) {
  .fsm-side { width: 220px; }
}
@media (max-width: 760px) {
  .fsm-main { flex-direction: column; }
  .fsm-toolbox { width: auto; display: flex; flex-wrap: wrap; gap: 2px; border-right: 0; border-bottom: 1px solid var(--edge); padding: 3px; }
  .fsm-toolbox h3 { display: none; }
  .fsm-toolbox .tb { width: auto; }
  .fsm-toolbox .tb span { display: none; }
  .fsm-side { width: auto; max-height: 34vh; border-left: 0; border-top: 1px solid var(--edge); }
  .fsm-menubar { flex-wrap: wrap; }
  .fsm-dropdown { max-width: calc(100vw - 16px); }
  .fsm-menubar .fsm-brand span { display: none; }
  .fsm-toolbar .tb span { display: none; }
  .fsm-status .grow { display: none; }
}