/* ==========================================================================
   OzzyBootstrap v1.0 - TurboVision / Borland DOS TUI CSS Framework
   ========================================================================== */

:root {
  /* Standard 16-color CGA/EGA/VGA Palette */
  --dos-black: #000000;
  --dos-blue: #0000aa;
  --dos-green: #00aa00;
  --dos-cyan: #00aaaa;
  --dos-red: #aa0000;
  --dos-magenta: #aa00aa;
  --dos-brown: #aa5500;
  --dos-lightgray: #aaaaaa;
  --dos-darkgray: #555555;
  --dos-lightblue: #5555ff;
  --dos-lightgreen: #55ff55;
  --dos-lightcyan: #55ffff;
  --dos-lightred: #ff5555;
  --dos-lightmagenta: #ff55ff;
  --dos-yellow: #ffff55;
  --dos-white: #ffffff;

  /* Character cell metrics */
  --ch-w: 1ch;
  --ch-h: 1.25rem;
  --font-dos: "Consolas", "Lucida Console", "Courier New", monospace;
}

/* Base Reset & Desktop Background */
*, *::before, *::after {
  box-sizing: border-box;
  border-radius: 0 !important;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  font-family: var(--font-dos);
  font-size: 16px;
  line-height: var(--ch-h);
  color: var(--dos-black);
  /* Classic Borland TurboVision ░ speckled desktop pattern */
  background-color: var(--dos-blue);
  background-image: 
    radial-gradient(var(--dos-lightgray) 25%, transparent 25%),
    radial-gradient(var(--dos-lightgray) 25%, transparent 25%);
  background-size: 4px 4px;
  background-position: 0 0, 2px 2px;
  -webkit-font-smoothing: none;
  font-smooth: never;
}

/* ==========================================================================
   Layout & Grid System
   ========================================================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--ch-h) 2ch;
}

.container-fluid {
  width: 100%;
  padding: var(--ch-h) 2ch;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ch-h) 2ch;
  margin-bottom: var(--ch-h);
}

.col { flex: 1 1 0%; min-width: 0; }
.col-auto { flex: 0 0 auto; }
.col-1  { flex: 0 0 calc(8.333% - 2ch); }
.col-2  { flex: 0 0 calc(16.666% - 2ch); }
.col-3  { flex: 0 0 calc(25% - 2ch); }
.col-4  { flex: 0 0 calc(33.333% - 2ch); }
.col-5  { flex: 0 0 calc(41.666% - 2ch); }
.col-6  { flex: 0 0 calc(50% - 2ch); }
.col-7  { flex: 0 0 calc(58.333% - 2ch); }
.col-8  { flex: 0 0 calc(66.666% - 2ch); }
.col-9  { flex: 0 0 calc(75% - 2ch); }
.col-10 { flex: 0 0 calc(83.333% - 2ch); }
.col-11 { flex: 0 0 calc(91.666% - 2ch); }
.col-12 { flex: 0 0 100%; }

@media (max-width: 768px) {
  [class^="col-"] {
    flex: 0 0 100%;
  }
}

/* ==========================================================================
   Top Menu Bar & Bottom Status Line
   ========================================================================== */
.menubar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background-color: var(--dos-lightgray);
  color: var(--dos-black);
  padding: 0 1ch;
  user-select: none;
}

.menu-item {
  position: relative;
  display: inline-block;
  padding: 0 1.5ch;
  color: var(--dos-black);
  text-decoration: none;
  cursor: pointer;
}

.menu-item:hover,
.menu-item:focus-within,
.menu-item.active {
  background-color: var(--dos-green);
  color: var(--dos-black);
}

.hotkey {
  color: var(--dos-red);
  font-weight: normal;
}

.menu-item:hover .hotkey,
.menu-item.active .hotkey,
.btn:hover .hotkey,
.status-item .hotkey {
  color: var(--dos-red);
}

/* Pull-down Menu */
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 24ch;
  background-color: var(--dos-lightgray);
  border: 2px solid var(--dos-black);
  padding: 0.25rem 0.5ch;
  box-shadow: 2ch calc(var(--ch-h) * 0.5) 0 rgba(0, 0, 0, 0.75);
  z-index: 200;
}

.menu-item:hover .dropdown-menu,
.menu-item:focus-within .dropdown-menu,
.menu-item.open .dropdown-menu {
  display: block;
}

.dropdown-item {
  display: flex;
  justify-content: space-between;
  padding: 0 1ch;
  color: var(--dos-black);
  text-decoration: none;
  white-space: nowrap;
}

.dropdown-item:hover {
  background-color: var(--dos-green);
  color: var(--dos-black);
}

.dropdown-divider {
  border: 0;
  border-top: 1px solid var(--dos-black);
  margin: 0.25rem -0.5ch;
}

/* Status Line (Bottom Bar) */
.statusline {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background-color: var(--dos-lightgray);
  color: var(--dos-black);
  padding: 0 1ch;
  user-select: none;
}

.status-item {
  padding: 0 1.5ch;
  color: var(--dos-black);
  text-decoration: none;
  cursor: pointer;
}

.status-item:hover {
  background-color: var(--dos-green);
}

.status-divider {
  color: var(--dos-darkgray);
}

/* ==========================================================================
   TurboVision Windows & Dialog Boxes
   ========================================================================== */
.window {
  --win-bg: var(--dos-lightgray);
  --win-border: var(--dos-white);
  position: relative;
  background-color: var(--win-bg);
  color: var(--dos-black);
  padding: 0.65rem 2ch 1rem 2ch;
  margin-bottom: calc(var(--ch-h) * 1.25);
  /* Hard black DOS character-cell drop shadow */
  box-shadow: 2ch calc(var(--ch-h) * 0.5) 0 rgba(0, 0, 0, 0.7);
}

/* Inner double-line frame inset by half a character cell (like TurboVision) */
.window::before {
  content: "";
  position: absolute;
  top: 0.6rem;
  bottom: 0.5rem;
  left: 1ch;
  right: 1ch;
  border: 4px double var(--win-border);
  pointer-events: none;
  z-index: 1;
}

/* Window Theme Variants */
.window-blue {
  --win-bg: var(--dos-blue);
  --win-border: var(--dos-lightcyan);
  color: var(--dos-yellow);
}

.window-cyan {
  --win-bg: var(--dos-cyan);
  --win-border: var(--dos-white);
  color: var(--dos-white);
}

.window-red {
  --win-bg: var(--dos-red);
  --win-border: var(--dos-yellow);
  color: var(--dos-white);
}

.window-dark {
  --win-bg: var(--dos-black);
  --win-border: var(--dos-lightgray);
  color: var(--dos-lightgray);
}

/* Window Header / Title Bar */
.window-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: -0.55rem;
  margin-bottom: 0.5rem;
  padding: 0 1ch;
  line-height: var(--ch-h);
  user-select: none;
}

.window-controls {
  background-color: var(--win-bg);
  padding: 0 0.5ch;
  color: var(--dos-white);
  cursor: pointer;
}

.window-controls:empty {
  padding: 0;
}

.window-controls .close-box::before {
  content: "[■]";
  color: var(--dos-lightgreen);
}

.window-controls .zoom-box::before {
  content: "[↕]";
  color: var(--dos-lightgreen);
}

.window-title {
  background-color: var(--win-bg);
  padding: 0 1ch;
  font-weight: bold;
  color: var(--dos-white);
  text-align: center;
  white-space: nowrap;
}

.window-blue .window-title {
  color: var(--dos-white);
}

.window-body {
  position: relative;
  z-index: 2;
  padding: 0.25rem 0.5ch;
}

.window-footer {
  display: flex;
  justify-content: center;
  gap: 2ch;
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}

/* Fieldset / Group Box (Single line border with embedded title) */
fieldset, .group-box {
  border: 1px solid var(--dos-white);
  padding: 0.5rem 1.5ch 0.75rem 1.5ch;
  margin: 0 0 var(--ch-h) 0;
}

.window-blue fieldset, .window-blue .group-box {
  border-color: var(--dos-lightcyan);
}

legend, .group-title {
  padding: 0 1ch;
  color: var(--dos-yellow);
  font-weight: normal;
}

.window:not(.window-blue):not(.window-red):not(.window-cyan) legend {
  color: var(--dos-black);
}

/* ==========================================================================
   Buttons (3D DOS Block Shadow Style)
   ========================================================================== */
.btn {
  display: inline-block;
  font-family: var(--font-dos);
  font-size: 1rem;
  line-height: var(--ch-h);
  background-color: var(--dos-green);
  color: var(--dos-black);
  border: none;
  padding: 0 2ch;
  margin: 0 1ch 0.5rem 0;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  /* Classic TurboVision half-block drop shadow (▄ / █) */
  box-shadow: 1ch 0.35rem 0 var(--dos-black);
  transition: none;
}

.btn::before {
  content: "< ";
  color: var(--dos-white);
}

.btn::after {
  content: " >";
  color: var(--dos-white);
}

.btn-default {
  background-color: var(--dos-lightgreen);
  color: var(--dos-black);
}

.btn-primary {
  background-color: var(--dos-cyan);
  color: var(--dos-white);
}

.btn-warning {
  background-color: var(--dos-yellow);
  color: var(--dos-black);
}

.btn-warning::before, .btn-warning::after {
  color: var(--dos-brown);
}

.btn-danger {
  background-color: var(--dos-red);
  color: var(--dos-white);
}

.btn-secondary {
  background-color: var(--dos-darkgray);
  color: var(--dos-white);
}

.btn:hover, .btn:focus {
  background-color: var(--dos-lightgreen);
  color: var(--dos-black);
  outline: none;
}

.btn:active {
  transform: translate(1ch, 0.35rem);
  box-shadow: none;
}

/* ==========================================================================
   Forms & Inputs (TurboVision Input Line & Brackets)
   ========================================================================== */
.form-group {
  margin-bottom: 0.75rem;
}

.form-label {
  display: block;
  margin-bottom: 0.15rem;
  color: inherit;
}

.form-control,
input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="search"],
select,
textarea {
  width: 100%;
  font-family: var(--font-dos);
  font-size: 1rem;
  line-height: var(--ch-h);
  background-color: var(--dos-blue);
  color: var(--dos-white);
  border: none;
  padding: 0 1ch;
  caret-color: var(--dos-yellow);
}

.window-blue .form-control,
.window-blue input[type="text"],
.window-blue input[type="password"],
.window-blue select,
.window-blue textarea {
  background-color: var(--dos-cyan);
  color: var(--dos-black);
}

.form-control:focus,
input:focus,
select:focus,
textarea:focus {
  background-color: var(--dos-cyan);
  color: var(--dos-white);
  outline: 1px dashed var(--dos-yellow);
}

/* Authentic [X] Checkboxes & (•) Radio Buttons */
.dos-check, .dos-radio {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  margin-right: 2ch;
  padding: 0 0.5ch;
  background-color: var(--dos-cyan);
  color: var(--dos-black);
}

.window-cyan .dos-check, .window-cyan .dos-radio {
  background-color: var(--dos-blue);
  color: var(--dos-white);
}

.dos-check input, .dos-radio input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.dos-check span::before {
  content: "[ ] ";
  font-weight: bold;
}

.dos-check input:checked + span::before {
  content: "[X] ";
}

.dos-radio span::before {
  content: "( ) ";
  font-weight: bold;
}

.dos-radio input:checked + span::before {
  content: "(•) ";
}

.dos-check:focus-within, .dos-radio:focus-within {
  background-color: var(--dos-green);
  color: var(--dos-white);
}

/* ==========================================================================
   Tables & List Viewers (Norton Commander / TV ListViewer style)
   ========================================================================== */
.table-dos {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--dos-cyan);
  color: var(--dos-black);
  border: 2px solid var(--dos-white);
  margin-bottom: var(--ch-h);
}

.window-blue .table-dos {
  background-color: var(--dos-blue);
  color: var(--dos-lightcyan);
  border-color: var(--dos-lightcyan);
}

.table-dos th {
  background-color: var(--dos-blue);
  color: var(--dos-yellow);
  text-align: left;
  padding: 0 1ch;
  border-bottom: 1px solid var(--dos-white);
  border-right: 1px solid var(--dos-white);
}

.window-blue .table-dos th {
  background-color: var(--dos-cyan);
  color: var(--dos-black);
}

.table-dos td {
  padding: 0 1ch;
  border-right: 1px solid var(--dos-white);
}

.table-dos tbody tr:hover,
.table-dos tbody tr.selected {
  background-color: var(--dos-green);
  color: var(--dos-black);
  cursor: pointer;
}

/* List Group with ASCII Scrollbar */
.list-dos {
  list-style: none;
  margin: 0 0 var(--ch-h) 0;
  padding: 0;
  background-color: var(--dos-cyan);
  color: var(--dos-black);
  border: 1px solid var(--dos-white);
}

.list-dos li {
  padding: 0 1ch;
  display: flex;
  justify-content: space-between;
  cursor: pointer;
}

.list-dos li:hover,
.list-dos li.active {
  background-color: var(--dos-green);
  color: var(--dos-white);
}

/* ==========================================================================
   Progress Bars & Alerts
   ========================================================================== */
.progress-dos {
  width: 100%;
  height: var(--ch-h);
  background-color: var(--dos-darkgray);
  position: relative;
  overflow: hidden;
  margin-bottom: 0.75rem;
  /* Text-mode ░ background track */
  background-image: repeating-linear-gradient(
    90deg,
    var(--dos-darkgray) 0px,
    var(--dos-darkgray) 2px,
    var(--dos-black) 2px,
    var(--dos-black) 4px
  );
}

.progress-bar {
  height: 100%;
  background-color: var(--dos-yellow);
  color: var(--dos-black);
  text-align: center;
  font-weight: bold;
  white-space: nowrap;
}

.alert {
  padding: 0.5rem 1.5ch;
  margin-bottom: var(--ch-h);
  border: 2px double var(--dos-white);
  box-shadow: 1.5ch 0.4rem 0 rgba(0, 0, 0, 0.7);
}

.alert-info    { background-color: var(--dos-cyan); color: var(--dos-black); }
.alert-success { background-color: var(--dos-green); color: var(--dos-white); }
.alert-warning { background-color: var(--dos-brown); color: var(--dos-yellow); }
.alert-danger  { background-color: var(--dos-red); color: var(--dos-yellow); }

/* Badges */
.badge {
  display: inline-block;
  padding: 0 1ch;
  background-color: var(--dos-blue);
  color: var(--dos-yellow);
}
.badge-success { background-color: var(--dos-green); color: var(--dos-white); }
.badge-danger  { background-color: var(--dos-red); color: var(--dos-white); }
.badge-warning { background-color: var(--dos-yellow); color: var(--dos-black); }

/* ==========================================================================
   Typography, Blinking Cursor & Utilities
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin: 0 0 0.75rem 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--dos-white);
  margin: 0.75rem 0;
}

code, pre {
  font-family: var(--font-dos);
  background-color: var(--dos-black);
  color: var(--dos-lightgreen);
}

pre {
  padding: 0.5rem 1ch;
  border: 1px solid var(--dos-darkgray);
  overflow-x: auto;
  margin: 0 0 var(--ch-h) 0;
}

.cursor-blink::after {
  content: "█";
  animation: dos-blink 1s steps(2, start) infinite;
}

@keyframes dos-blink {
  to { visibility: hidden; }
}

/* Color & Spacing Utilities */
.text-white       { color: var(--dos-white) !important; }
.text-yellow      { color: var(--dos-yellow) !important; }
.text-cyan        { color: var(--dos-lightcyan) !important; }
.text-green       { color: var(--dos-lightgreen) !important; }
.text-red         { color: var(--dos-lightred) !important; }
.text-muted       { color: var(--dos-darkgray) !important; }

.bg-black         { background-color: var(--dos-black) !important; }
.bg-blue          { background-color: var(--dos-blue) !important; }
.bg-cyan          { background-color: var(--dos-cyan) !important; }
.bg-lightgray     { background-color: var(--dos-lightgray) !important; }
.bg-red           { background-color: var(--dos-red) !important; }

.text-center      { text-align: center !important; }
.text-right       { text-align: right !important; }
.d-flex           { display: flex !important; }
.justify-between  { justify-content: space-between !important; }
.align-center     { align-items: center !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1.25rem !important; }
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1.25rem !important; }