/* Workbench, controls and supporting dialogs. */
.workspace { display: grid; grid-template-columns: .85fr 1.15fr; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.workspace { background: color-mix(in srgb, var(--panel) 92%, var(--accent-soft)); box-shadow: 0 24px 60px rgba(11,29,29,.18), inset 0 1px rgba(255,255,255,.28); }
.workspace::before { display: none; }
.workspace { position: relative; }
.workbench-column { min-width: 0; padding: 30px; display: flex; flex-direction: column; gap: 34px; }
.workbench-column > .panel:first-child { margin-top: 0; }
.workbench-column + .workbench-column { border-left: 1px solid var(--line); }
.panel { min-width: 0; }
.panel + .panel { padding-top: 30px; border-top: 1px solid var(--line); }
.panel-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; margin-bottom: 22px; }
.panel-heading h2 { text-wrap: balance; }
.panel h2 { margin: 6px 0 0; font-size: 20px; font-weight: 600; line-height: 1.35; letter-spacing: -.04em; }
.panel h2::after { content: ""; display: block; width: 32px; height: 2px; margin-top: 9px; background: var(--accent); opacity: .65; }
.button, .icon-button, .text-button { border: 0; cursor: pointer; transition: background .2s, color .2s, border-color .2s, transform .2s; }
.button { min-height: 40px; padding: 11px 16px; border-radius: 8px; font-size: 11px; font-weight: 700; }
.button--primary { background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 72%, #15203f)); color: var(--on-accent); box-shadow: 0 5px 14px var(--lab-glow); }
.button--primary:hover:not(:disabled) { filter: brightness(1.08); transform: translateY(-1px); }
.button--ghost { background: color-mix(in srgb, var(--panel) 70%, transparent); border: 1px solid var(--line); }
.button--ghost:hover { background: var(--panel-2); border-color: var(--muted); }
.button--ghost { letter-spacing: .02em; }
.icon-button { display: inline-grid; place-items: center; width: 36px; height: 36px; background: transparent; border-radius: 50%; font-size: 18px; color: var(--muted); }
.icon-button svg { width: 18px; height: 18px; }
.icon-button:hover, .icon-button.is-active { background: var(--accent-soft); color: var(--accent); }
.text-button { padding: 6px 0; background: none; color: var(--accent); font-size: 11px; }
.text-button:hover:not(:disabled) { text-decoration: underline; text-underline-offset: 4px; }
.button:active:not(:disabled), .icon-button:active { transform: translateY(1px); }
button:disabled { cursor: not-allowed; }
.status-pill { padding: 6px 9px; border-radius: 5px; background: var(--panel-2); color: var(--muted); font: 9px var(--mono); letter-spacing: .08em; box-shadow: inset 0 0 0 1px rgba(255,255,255,.06); }
.status-pill.is-open { background: var(--accent-soft); color: var(--accent); }
.lock-stage { position: relative; height: 184px; overflow: hidden; border-radius: 10px; border: 1px solid var(--line); background: var(--panel-2); }
.lock-stage__grid { position: absolute; inset: 0; background-image: radial-gradient(var(--wire) .7px, transparent .7px); background-size: 16px 16px; opacity: .13; }
.coil { position: absolute; z-index: 2; left: 8%; top: 44px; width: 78px; height: 96px; border: 1px solid var(--wire); border-radius: 6px; background: repeating-linear-gradient(90deg, var(--panel) 0 5px, var(--metal) 5px 8px); display: grid; place-items: center; transition: border-color .25s; }
.coil span { padding: 5px 7px; background: var(--panel); color: var(--muted); font: 9px var(--mono); border-radius: 3px; }
.armature { position: absolute; z-index: 1; left: 24%; top: 74px; width: 66%; height: 34px; border: 1px solid var(--wire); border-radius: 3px; background: var(--metal); transition: left .55s cubic-bezier(.2,.8,.2,1); }
.armature span { position: absolute; right: -5px; top: 5px; height: 22px; width: 10px; background: var(--wire); border-radius: 2px; }
.receiver { position: absolute; right: 7%; top: 40px; width: 28px; height: 104px; border: 1px solid var(--wire); border-radius: 4px; background: var(--metal); }
.receiver::after { content: ""; position: absolute; inset: 31px 5px; background: var(--panel-2); border-radius: 2px; }
.beam { display: none; }
.lock-stage.is-open .armature { left: 9%; }
.lock-stage.is-open .coil { border-color: var(--accent); }
.lock-stage.is-open .coil span { color: var(--accent); background: var(--accent-soft); }
.readout { display: grid; align-items: center; grid-template-columns: auto 1fr 6px; gap: 8px; padding: 15px 0 0; color: var(--muted); font: 8px/1.6 var(--mono); }
.readout strong { text-align: right; color: var(--text); font-size: 9px; font-weight: 400; }
.readout-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--line); }
.readout-dot.is-on { background: var(--accent); }
.event-log { margin-top: 18px; }
.event-log > span { color: var(--muted); font: 8px var(--mono); letter-spacing: .08em; }
.event-log p { color: var(--muted); margin: 5px 0 0; min-height: 34px; font-size: 11px; line-height: 1.6; }
.event-log { padding: 12px; border: 1px dashed var(--line); border-radius: 6px; background: color-mix(in srgb, var(--panel-2) 60%, transparent); }
.explanation { display: flex; gap: 14px; padding: 16px 0; border-block: 1px solid var(--line); }
.explanation__number { color: var(--accent); font: 20px/1.3 var(--mono); flex-shrink: 0; }
.explanation p { margin: 0; font-size: 11px; color: var(--muted); line-height: 1.7; }
.legend { display: flex; gap: 14px; margin-top: 15px; color: var(--muted); font-size: 9px; }
.legend-dot { display: inline-block; width: 5px; height: 5px; border-radius: 50%; margin-right: 5px; background: var(--wire); }
.legend-dot--active { background: var(--accent); }
.legend-dot--error { background: var(--danger); }
.code-display { display: grid; grid-template-columns: 40px 1fr 32px; align-items: center; margin-bottom: 14px; padding: 8px 0 16px; border-bottom: 1px solid var(--line); }
.code-display > span { color: var(--muted); font: 9px var(--mono); }
.code-display strong { color: var(--text); text-align: center; font: 24px var(--mono); letter-spacing: .18em; }
.code-display button { border: 0; cursor: pointer; background: transparent; color: var(--muted); font-size: 18px; }
.lamp { width: 8px; height: 8px; margin-top: 7px; background: var(--line); border-radius: 50%; transition: background .2s; }
.lamp.is-success { background: var(--accent); }
.lamp.is-error { background: var(--danger); }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.keypad button { height: 42px; border: 1px solid transparent; border-radius: 6px; background: var(--panel-2); color: var(--text); font: 14px var(--mono); cursor: pointer; transition: background .15s, border-color .15s, transform .15s; }
.keypad button:hover:not(:disabled) { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.keypad button:active:not(:disabled) { transform: scale(.96); }
.keypad .keypad__disabled { visibility: hidden; }
.keypad .keypad__reset { font-size: 9px; color: var(--muted); background: transparent; }
.keyboard-tip { color: var(--muted); font-size: 10px; margin: 14px 0 0; }
.field-label { display: flex; justify-content: space-between; gap: 10px; margin-bottom: 10px; color: var(--text); font-size: 12px; }
.field-label span { font-size: 10px; color: var(--muted); }
.code-input-wrap { display: flex; gap: 8px; }
.code-input-wrap input { width: 100%; min-width: 0; padding: 9px 13px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--text); font: 16px var(--mono); letter-spacing: .18em; }
.field-hint { margin: 10px 0 22px; color: var(--muted); font-size: 10px; line-height: 1.7; }
.control-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.save-note { font: 8px var(--mono); color: var(--muted); }
.modal { width: min(520px, calc(100% - 32px)); max-height: calc(100dvh - 32px); overflow-y: auto; border: 1px solid var(--line); border-radius: 16px; padding: 28px; color: var(--text); background: var(--panel); box-shadow: 0 18px 90px #0002; }
.modal[open] { animation: dialog-enter .2s ease-out; }
.modal::backdrop { background: #11171370; backdrop-filter: blur(5px); }
.modal__top { display: flex; justify-content: space-between; align-items: center; }
.modal-close { display: grid; place-items: center; min-width: 32px; height: 32px; border: 0; border-radius: 50%; background: var(--panel-2); color: var(--muted); font-size: 22px; cursor: pointer; transition: color .2s, transform .2s; }
.modal-close:hover { color: var(--text); transform: rotate(90deg); }
.modal h2 { margin: 16px 0; font-size: 28px; font-weight: 500; letter-spacing: -.04em; }
.modal p, .modal li { color: var(--muted); font-size: 13px; line-height: 1.8; }
.modal ol { padding-left: 20px; }
.modal__note { border-left: 2px solid var(--accent); padding: 12px; background: var(--accent-soft); font-size: 11px !important; }
.quiz-progress { color: var(--muted); font: 10px var(--mono); }
.quiz-options { display: grid; gap: 8px; }
.quiz-options button, .archive-file { padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); color: var(--text); text-align: left; cursor: pointer; transition: border-color .2s; }
.quiz-options button:hover, .archive-file:hover { border-color: var(--accent); }
.quiz-result { color: var(--accent) !important; font-size: 20px !important; }
.radio-panel { display: flex; flex-wrap: wrap; gap: 16px; padding: 18px; border: 1px solid var(--line); border-radius: 10px; }
.radio-panel__intro { display: flex; align-items: center; gap: 10px; }
.radio-panel__intro strong { display: block; margin-top: 4px; font-size: 13px; }
.radio-panel__signal { font-size: 10px; }
.radio-controls { display: flex; align-items: center; gap: 8px; min-width: 0; }

/* VM-16 inspired industrial keypad reconstruction. The surrounding PWA stays modern;
   this module is deliberately warmer and more tactile, like a replaced laboratory unit. */
.keypad-panel {
  position: relative;
  padding: 22px;
  border: 1px solid color-mix(in srgb, var(--wire) 42%, var(--line));
  border-radius: 9px;
  background:
    linear-gradient(135deg, rgba(255,255,255,.16), transparent 38%),
    linear-gradient(180deg, #d8d9d0 0%, #c3c7bd 100%);
  color: #20251f;
  box-shadow: inset 0 1px rgba(255,255,255,.55), inset 0 -2px rgba(44,52,45,.14), 0 10px 24px rgba(12,18,14,.12);
}
:root[data-theme="dark"] .keypad-panel {
  background: linear-gradient(135deg, rgba(255,255,255,.12), transparent 38%), linear-gradient(180deg, #777d72, #5e675e);
  color: #182019;
}
.keypad-panel::before, .keypad-panel::after { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: #6f776d; box-shadow: inset 0 1px 1px rgba(255,255,255,.55); }
.keypad-panel::before { top: 9px; left: 10px; }
.keypad-panel::after { top: 9px; right: 10px; }
.keypad-panel .panel-heading { align-items: center; margin-bottom: 15px; padding: 0 4px 13px; border-bottom: 1px solid rgba(44,52,45,.26); }
.keypad-panel .panel-kicker { color: #566156; }
.keypad-panel h2 { color: #202820; font: 700 17px/1.2 var(--mono); letter-spacing: -.04em; }
:root[data-theme="dark"] .keypad-panel h2 { color: #1b241d; }
.keypad-panel .lamp { position: relative; width: 19px; height: 19px; margin: 0 3px 0 0; border: 3px solid #596257; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #d9ded5 0 12%, #8f988b 35%, #646c62 72%); box-shadow: inset 0 1px 2px rgba(255,255,255,.55), 0 1px 1px rgba(0,0,0,.28); transition: box-shadow .18s, background .18s, border-color .18s; }
.keypad-panel .lamp::after { content: "HL1"; position: absolute; top: 24px; right: -2px; color: #566156; font: 7px var(--mono); }
.keypad-panel .lamp.is-success { border-color: #5d624d; background: radial-gradient(circle at 34% 28%, #fff7c5 0 10%, #e6bb54 34%, #9b6b1c 74%); box-shadow: 0 0 0 2px rgba(175,139,48,.18), 0 0 14px rgba(226,183,72,.7), inset 0 1px 2px #fff7c5; }
.keypad-panel .lamp.is-error { border-color: #67453e; background: radial-gradient(circle at 34% 28%, #ffd0bd 0 10%, #d96c4d 36%, #813a2d 74%); box-shadow: 0 0 0 2px rgba(190,70,46,.16), 0 0 11px rgba(211,86,60,.5); }
.keypad-panel .code-display { margin: 0 4px 16px; padding: 10px 11px; border: 1px solid rgba(49,57,49,.3); border-radius: 3px; background: rgba(46,57,47,.12); box-shadow: inset 0 2px 4px rgba(24,31,25,.12); }
.keypad-panel .code-display > span { color: #566156; font-size: 8px; }
.keypad-panel .code-display strong { color: #283129; font-size: 21px; letter-spacing: .2em; text-shadow: 0 1px rgba(255,255,255,.42); }
.keypad-panel .code-display button { color: #4f5c50; border: 1px solid rgba(49,57,49,.26); border-radius: 3px; background: rgba(255,255,255,.18); line-height: 1; }
.keypad-panel .code-display button:hover { color: #273128; background: rgba(255,255,255,.36); }
.keypad { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; padding: 12px; border: 1px solid rgba(49,57,49,.3); border-radius: 4px; background: #aab1a6; box-shadow: inset 0 2px 5px rgba(35,43,36,.2), 0 1px rgba(255,255,255,.45); }
.keypad button { position: relative; height: 48px; border: 1px solid #697267; border-radius: 4px; background: linear-gradient(180deg, #e5e6df 0%, #c8ccc3 65%, #b1b7ad 100%); color: #273128; font: 700 16px var(--mono); text-shadow: 0 1px rgba(255,255,255,.7); box-shadow: 0 3px 0 #727a70, 0 5px 7px rgba(38,46,39,.2), inset 0 1px rgba(255,255,255,.8); transition: transform .09s ease, box-shadow .09s ease, filter .15s ease, border-color .15s ease; }
.keypad button::after { content: ""; position: absolute; inset: 3px; border: 1px solid rgba(255,255,255,.28); border-radius: 2px; pointer-events: none; }
.keypad button:hover:not(:disabled) { border-color: #4d6a9b; filter: saturate(1.05) brightness(1.03); color: #233d78; background: linear-gradient(180deg, #eef0ea, #cbd2d0); }
.keypad button:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 0 0 #727a70, 0 1px 2px rgba(38,46,39,.25), inset 0 2px 4px rgba(38,46,39,.18); }
.keypad button:focus-visible { outline-color: #3659d9; outline-offset: 3px; }
.keypad .keypad__disabled { visibility: visible; opacity: .42; color: #657064; background: #b7bdb4; box-shadow: 0 2px 0 #858d82; cursor: default; }
.keypad .keypad__disabled::after { content: "·"; border: 0; inset: auto; }
.keypad .keypad__reset { color: #4e5b50; background: linear-gradient(180deg, #cfd3ca, #aeb5ab); font-size: 9px; letter-spacing: .04em; }
.keyboard-tip { margin: 13px 4px 0; color: #566156; font: 9px var(--mono); }
@media (max-width: 480px) {
  .keypad-panel { padding: 17px 14px; }
  .keypad { gap: 7px; padding: 9px; }
  .keypad button { height: 45px; }
}
.radio-controls select { min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--text); font-size: 11px; }
.radio-play { width: 40px; padding-inline: 0; }
.radio-volume { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.radio-volume input { width: 100%; min-width: 0; accent-color: var(--accent); }
.radio-volume output { font: 10px var(--mono); }
.radio-stations { display: flex; gap: 8px; order: 4; width: 100%; overflow-x: auto; padding: 3px; scrollbar-color: var(--wire) transparent; }
.radio-station-card { flex: 0 0 60px; padding: 4px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); cursor: pointer; }
.radio-station-card:hover, .radio-station-card.is-selected { border-color: var(--accent); }
.radio-station-card img { width: 50px; height: 50px; border-radius: 4px; object-fit: cover; }
.radio-station-card span { display: block; max-width: 50px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 8px; }
.radio-credit { color: var(--muted); font-size: 10px; }
.minesweeper-heading { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.minesweeper-status { display: flex; justify-content: space-between; gap: 10px; padding: 12px 0; color: var(--muted); font: 10px var(--mono); }
.minesweeper-board { display: grid; grid-template-columns: repeat(9, 1fr); gap: 3px; }
.mine-cell { aspect-ratio: 1; border: 1px solid var(--line); border-radius: 4px; background: var(--panel-2); color: var(--text); font: 12px var(--mono); cursor: pointer; }
.mine-cell:hover { border-color: var(--accent); }
.mine-cell.is-open { border-color: transparent; background: var(--panel); }
.mine-cell.is-mine { background: var(--danger-soft); color: var(--danger); }
.mine-cell.is-flagged, .mine-cell.number-1 { color: var(--accent); }
.mine-cell.number-2 { color: var(--supply); }
.mine-cell.number-3, .mine-cell.number-4 { color: var(--danger); }
.minesweeper-tip { font-size: 10px !important; margin: 14px 0 6px; }
.minesweeper-flag-toggle { display: block; }
.archive-files { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-block: 20px; }
.archive-file span, .archive-file small { display: block; font: 9px var(--mono); color: var(--muted); }
.archive-file strong { display: block; margin: 12px 0; font-size: 12px; }
.archive-file.is-open { border-color: var(--accent); }
.archive-reader { padding: 16px; background: var(--panel-2); border-radius: 8px; color: var(--muted); font-size: 12px; }
.archive-reader p { margin: 0; }
.archive-reader button { margin-top: 10px; }
.signal-test__top { display: flex; justify-content: space-between; gap: 10px; font: 9px var(--mono); margin-bottom: 12px; }
.signal-lamps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.signal-lamp { aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; background: var(--panel); cursor: pointer; }
.signal-lamp.is-target { background: var(--accent); border-color: var(--accent); }
@keyframes dialog-enter { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 1000px) { .workbench-column { padding: 24px; } }
@media (max-width: 800px) { .workspace { grid-template-columns: 1fr; } .workbench-column + .workbench-column { border-left: 0; border-top: 1px solid var(--line); } }
@media (max-width: 480px) { .workspace { border-radius: 12px; } .workbench-column { padding: 20px; gap: 26px; } .panel h2 { font-size: 18px; } .modal { padding: 20px; } .archive-files { grid-template-columns: 1fr; } .minesweeper-heading { flex-wrap: wrap; } }