:root {
  --bg: #0f1115;
  --panel: #181b22;
  --panel-2: #20242d;
  --line: #2c313c;
  --text: #e9ebf0;
  --muted: #8b92a3;
  --accent: #7c5cff;
  --ok: #2ecc71;
  --warn: #f5a623;
  --bad: #ff4d4f;
  --live: #ff3b3b;
  --gap: 10px;
  --radius: 14px;
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.35 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
}
[hidden] { display: none !important; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

/* ---------- login ---------- */
.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: min(360px, 100%); background: var(--panel); border: 1px solid var(--line);
  border-radius: 18px; padding: 24px; display: grid; gap: 14px;
}
.login-card h1 { margin: 0 0 6px; font-size: 22px; display: flex; gap: 10px; align-items: center; }
.logo { color: var(--accent); }
label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
input, select {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; color: var(--text); width: 100%; user-select: text; -webkit-user-select: text;
}
input[type="color"] { padding: 2px; height: 42px; }
.primary { background: var(--accent); border: 0; border-radius: 10px; padding: 12px; font-weight: 600; color: #fff; }
.error { color: var(--bad); min-height: 1.2em; margin: 0; font-size: 13px; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 8px;
  padding: calc(env(safe-area-inset-top) + 8px) calc(env(safe-area-inset-right) + 12px) 8px calc(env(safe-area-inset-left) + 12px);
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.tabs { display: flex; gap: 6px; overflow-x: auto; flex: 1; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab {
  border: 1px solid var(--line); background: var(--panel); border-radius: 999px;
  padding: 6px 14px; white-space: nowrap; color: var(--muted);
}
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.topbar-right { display: flex; align-items: center; gap: 6px; }
.ghost { background: transparent; border: 1px solid var(--line); border-radius: 10px; padding: 6px 12px; }
.ghost.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.status { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); white-space: nowrap; }
.status i { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); display: inline-block; }
.status.ok i { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.status.warn i { background: var(--warn); }
.status.bad i { background: var(--bad); }
@media (max-width: 420px) { .status span { display: none; } }
@media (max-height: 500px) {
  .topbar { padding-top: calc(env(safe-area-inset-top) + 4px); padding-bottom: 4px; }
  .tab { padding: 4px 12px; }
  .ghost { padding: 4px 10px; }
  .editbar { padding: 4px 12px; }
  .grid { padding-top: 8px; padding-bottom: calc(env(safe-area-inset-bottom) + 8px); }
}

.editbar {
  display: flex; gap: 6px; padding: 8px 12px; overflow-x: auto; background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.editbar button { background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 6px 12px; white-space: nowrap; }

/* ---------- grid ---------- */
.grid {
  --cols: 4;
  --rows: 3;
  --cell: 96px; /* row height, set by fitGrid() in app.js so the page fits the screen */
  --colw: 96px; /* column width, set by fitGrid() */
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--colw));
  grid-template-rows: repeat(var(--rows), var(--cell));
  grid-auto-rows: var(--cell);
  justify-content: center;
  position: relative;
  gap: var(--gap);
  padding: 12px calc(env(safe-area-inset-right) + 12px) calc(env(safe-area-inset-bottom) + 12px) calc(env(safe-area-inset-left) + 12px);
  max-width: 960px;
  margin: 0 auto;
}
.cell {
  position: relative; border-radius: var(--radius); overflow: hidden; min-width: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  padding: 8px; text-align: center; border: 1px solid transparent; touch-action: manipulation;
  transition: transform .08s ease, box-shadow .15s ease, filter .15s ease;
}
.btn { background: var(--c, #2d4a6b); color: #fff; box-shadow: inset 0 -3px 0 rgba(0,0,0,.25); }
.btn:active, .btn.pressed { transform: scale(.95); filter: brightness(1.2); }
.btn .icon { font-size: calc(var(--cell) * .32); line-height: 1; }
.btn .label { font-weight: 600; font-size: 13px; line-height: 1.15; overflow-wrap: anywhere; }
.btn .sub { font-size: 11px; opacity: .9; font-variant-numeric: tabular-nums; }
.btn.on { box-shadow: 0 0 0 3px #fff inset, 0 0 18px var(--c); }
.btn.on .sub { font-weight: 700; }
.btn.off { filter: saturate(.3) brightness(.7); }
.btn.armed { box-shadow: 0 0 0 3px var(--warn) inset; animation: pulse .6s infinite alternate; }
@keyframes pulse { to { filter: brightness(1.35); } }
.btn.fail { animation: shake .3s; box-shadow: 0 0 0 3px var(--bad) inset; }
.btn.unset { background: var(--panel-2); border: 1px dashed var(--line); color: var(--muted); }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

.tile { background: var(--panel); border-color: var(--line); align-items: flex-start; justify-content: space-between; text-align: left; }
.tile .tlabel { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.tile .tvalue { font-size: clamp(16px, calc(var(--cell) * .2), 30px); font-weight: 700; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; line-height: 1.1; }
.tile .tsub { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; min-height: 1em; }
.tile.live .tvalue { color: var(--live); }
.tile.good .tvalue { color: var(--ok); }
.tile.warn .tvalue { color: var(--warn); }
.tile.bad .tvalue { color: var(--bad); }

.editing .cell { outline: 2px dashed rgba(255,255,255,.35); outline-offset: -4px; }
.editing .cell::after { content: "✎"; position: absolute; top: 6px; right: 8px; font-size: 12px; opacity: .8; }
.editing .cell { cursor: grab; -webkit-touch-callout: none; }
.slot {
  border: 1px dashed var(--line); background: transparent; border-radius: var(--radius);
  color: var(--muted); font-size: 22px; opacity: .6; transition: opacity .15s, border-color .15s;
}
.slot:hover { opacity: 1; border-color: var(--accent); color: var(--accent); }
.cell.dragging { opacity: .25; }
.ghost-drag {
  position: fixed; z-index: 50; pointer-events: none; margin: 0; opacity: .92;
  transform: scale(1.05); box-shadow: 0 12px 30px rgba(0,0,0,.5); cursor: grabbing;
}
.ghost-drag::after { display: none; }
.drop-target {
  border: 2px solid var(--accent); background: rgba(124,92,255,.15); border-radius: var(--radius);
  pointer-events: none; z-index: 1;
}
.drop-target.bad { border-color: var(--bad); background: rgba(255,77,79,.12); }
/* Dragging past an edge: glow on that side to show a new column/row will be added there. */
.grid[data-extend~="left"] { box-shadow: inset 5px 0 0 var(--accent); }
.grid[data-extend~="right"] { box-shadow: inset -5px 0 0 var(--accent); }
.grid[data-extend~="top"] { box-shadow: inset 0 5px 0 var(--accent); }
.grid[data-extend~="bottom"] { box-shadow: inset 0 -5px 0 var(--accent); }
.grid[data-extend~="left"][data-extend~="top"] { box-shadow: inset 5px 5px 0 var(--accent); }
.grid[data-extend~="right"][data-extend~="bottom"] { box-shadow: inset -5px -5px 0 var(--accent); }
.grid[data-extend~="left"][data-extend~="bottom"] { box-shadow: inset 5px -5px 0 var(--accent); }
.grid[data-extend~="right"][data-extend~="top"] { box-shadow: inset -5px 5px 0 var(--accent); }
.grid.extend-bad { --accent: var(--bad); }
.empty { grid-column: 1 / -1; color: var(--muted); text-align: center; padding: 32px 12px; border: 1px dashed var(--line); border-radius: var(--radius); }

/* ---------- dialogs ---------- */
dialog {
  background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: 18px;
  padding: 0; width: min(480px, calc(100vw - 24px)); max-height: calc(100vh - 32px);
}
dialog::backdrop { background: rgba(0,0,0,.6); }
dialog form { padding: 18px; display: grid; gap: 12px; }
dialog h2 { margin: 0; font-size: 18px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.actions-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.actions-row button, .menu button, .step button {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 9px 14px;
}
.actions-row .primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.danger { color: var(--bad) !important; }
.spacer { flex: 1; }
.fieldset { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; }
.step { display: grid; gap: 8px; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); }
.step-head { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 12px; }
.step-tools { display: flex; gap: 4px; }
.step-tools button { padding: 4px 10px; }
.inline { display: flex; gap: 8px; align-items: center; }
.inline select { flex: 1; }
.btn.running { box-shadow: 0 0 0 3px var(--warn) inset; }
.btn.running .sub { font-weight: 700; }
.icons { display: flex; flex-wrap: wrap; gap: 4px; }
.icons button { background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; width: 38px; height: 38px; font-size: 18px; padding: 0; }
.hint { color: var(--muted); font-size: 12px; margin: 0; }
.paircode {
  font: 700 34px/1.2 ui-monospace, "Cascadia Mono", Consolas, monospace; letter-spacing: .08em; text-align: center;
  padding: 14px; border: 1px dashed var(--accent); border-radius: 12px; user-select: text; -webkit-user-select: text;
}
.menu p { margin: 0 0 4px; color: var(--muted); }

.toast {
  position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom) + 20px); transform: translateX(-50%) translateY(20px);
  background: #000c; border: 1px solid var(--line); padding: 10px 16px; border-radius: 12px; opacity: 0;
  transition: .2s; pointer-events: none; max-width: calc(100vw - 32px); z-index: 20;
}
.toast.show { opacity: 1; transform: translateX(-50%); }
.toast.bad { border-color: var(--bad); }