:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --border: #d7dce5;
  --text: #1f2733;
  --muted: #6b7686;
  --accent: #2d7dd2;
  --accent-soft: #e7f0fb;
  --danger: #e5484d;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

body { display: flex; flex-direction: column; }

/* --- Horní lišta --- */
#toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  z-index: 10;
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: .2px; }
.project-bar { display: flex; align-items: center; gap: 5px; margin-left: 18px; padding-left: 18px; border-left: 1px solid var(--border); }
.project-label { font-size: 12px; color: var(--muted); }
#project-select {
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 8px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  max-width: 220px;
  cursor: pointer;
}
#project-select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.project-bar button {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 7px;
  width: 30px; height: 30px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text);
}
.project-bar button:hover { background: var(--accent-soft); border-color: var(--accent); }
#btn-project-delete:hover { background: #fdecec; border-color: var(--danger); color: var(--danger); }

.tools { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.tools button {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 7px;
  padding: 6px 10px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
  transition: background .12s, border-color .12s;
}
.tools button:hover { background: var(--accent-soft); border-color: var(--accent); }
.tools button:disabled { opacity: .4; cursor: default; background: #fff; border-color: var(--border); }
#btn-delete-sel:not(:disabled):hover { background: #fdecec; border-color: var(--danger); color: var(--danger); }
.tools .sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }
#zoom-label { font-size: 13px; color: var(--muted); min-width: 54px; text-align: center; }
.save-state { font-size: 12px; color: var(--muted); min-width: 70px; text-align: right; }
.save-state.dirty { color: var(--danger); }

/* --- Rozvržení pracovní plochy --- */
#workspace { flex: 1; display: flex; min-height: 0; position: relative; }
#drawer-backdrop { display: none; position: absolute; inset: 0; background: rgba(15, 23, 42, .42); z-index: 35; }
.mobile-only { display: none; }

/* --- Paleta --- */
#palette {
  width: 190px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 14px 12px;
  overflow-y: auto;
}
#palette h3 { margin: 0 0 2px; font-size: 14px; }
#palette .hint { margin: 0 0 12px; font-size: 11px; color: var(--muted); }
#palette-items { display: flex; flex-direction: column; gap: 7px; }
.palette-section { margin: 14px 0 2px; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; font-weight: 600; }
.palette-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 9px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  cursor: pointer;
  background: #fff;
  font-size: 13px;
  user-select: none;
  transition: transform .08s, box-shadow .12s;
}
.palette-item:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.palette-item .ico { font-size: 18px; width: 22px; text-align: center; }

.palette-help { margin-top: 18px; }
.palette-help h4 { margin: 0 0 6px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.palette-help ul { margin: 0; padding-left: 16px; }
.palette-help li { font-size: 11.5px; color: var(--muted); margin-bottom: 4px; }

/* --- Plátno --- */
#canvas-wrap { flex: 1; position: relative; min-width: 0; }
#canvas { width: 100%; height: 100%; display: block; cursor: default; touch-action: none; }
#canvas.panning { cursor: grabbing; }
#canvas.linking { cursor: crosshair; }

.device .body {
  fill: #fff;
  stroke: var(--border);
  stroke-width: 1.5;
  rx: 10;
}
.device .accent { rx: 10; }
.device .title {
  font-size: 13px;
  font-weight: 600;
  fill: var(--text);
  pointer-events: none;
}
.device .subtitle {
  font-size: 10.5px;
  fill: var(--muted);
  pointer-events: none;
}
.device .icon { font-size: 22px; pointer-events: none; }
.device.selected .body { stroke: var(--accent); stroke-width: 2.5; }
.device { cursor: grab; }
.device.dragging { cursor: grabbing; }

.device-handle { fill: #fff; stroke: var(--accent); stroke-width: 1.5; cursor: nwse-resize; }
.device-handle:hover { fill: var(--accent-soft); }
.port { fill: #fff; stroke: #90a0b5; stroke-width: 1.5; cursor: crosshair; }
.port:hover, .port.hot { fill: var(--accent); stroke: var(--accent); }
.port-hit { fill: transparent; stroke: none; }
.port-hit:hover { fill: rgba(45, 125, 210, .12); stroke: none; }
.port-hit.hot { fill: rgba(45, 125, 210, .22); stroke: var(--accent); stroke-width: 2; }
.port-label { font-size: 8.5px; fill: var(--muted); pointer-events: none; text-anchor: middle; }

/* --- Budovy / oblasti --- */
.zone { cursor: move; }
.zone .zone-body { rx: 14; stroke-width: 2; }
.zone.selected .zone-body { stroke-width: 3; stroke-dasharray: 8 5; }
.zone.nest-target .zone-body { stroke-width: 4; stroke-dasharray: 2 6; fill-opacity: 0.28; }
.zone .zone-titlebar { pointer-events: none; }
.zone .zone-title { font-size: 13px; font-weight: 700; pointer-events: none; }
.zone .zone-handle { fill: #fff; stroke-width: 2; cursor: nwse-resize; }
.zone .zone-handle:hover { fill: #eef4fc; }

.link { fill: none; stroke-width: 2.5; cursor: pointer; }
.link.hit { stroke: transparent; stroke-width: 14px; fill: none; cursor: pointer; }
.link.selected { stroke-dasharray: 6 4; }
.link-label {
  font-size: 10px;
  fill: var(--text);
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 3px;
  text-anchor: middle;
}
.link-end-label {
  font-size: 9px;
  fill: #35506b;
  paint-order: stroke;
  stroke: #fff;
  stroke-width: 3px;
  text-anchor: middle;
}
.tmp-link { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-dasharray: 5 4; pointer-events: none; }

/* --- Inspektor --- */
#inspector {
  width: 280px;
  background: var(--panel);
  border-left: 1px solid var(--border);
  padding: 14px;
  overflow-y: auto;
}
.inspector-empty { color: var(--muted); font-size: 13px; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 4px; }
.field input[type="text"], .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 8px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
}
.field textarea { resize: vertical; min-height: 56px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

.inspector-title { display: flex; align-items: center; gap: 8px; margin: 0 0 14px; font-size: 15px; }
.inspector-title .ico { font-size: 20px; }

.color-row { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.swatch { width: 24px; height: 24px; border-radius: 6px; border: 2px solid #fff; box-shadow: 0 0 0 1px var(--border); cursor: pointer; }
.swatch.active { box-shadow: 0 0 0 2px var(--accent); }
.color-row input[type="color"] { width: 34px; height: 28px; border: 1px solid var(--border); border-radius: 6px; padding: 0; background: #fff; cursor: pointer; }

.iface-list { display: flex; flex-direction: column; gap: 6px; }
.iface-row { display: flex; gap: 6px; align-items: center; }
.iface-row input { flex: 1; }
.iface-row .used { font-size: 10px; color: var(--accent); white-space: nowrap; }
.field-row { display: flex; gap: 6px; align-items: center; }
.field-row input { flex: 1; min-width: 0; }
.btn-icon {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  width: 28px; height: 30px;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
}
.btn-icon:hover { border-color: var(--danger); color: var(--danger); }
.btn-add {
  margin-top: 8px;
  border: 1px dashed var(--border);
  background: #fff;
  border-radius: 7px;
  padding: 6px;
  width: 100%;
  cursor: pointer;
  font-size: 12px;
  color: var(--muted);
}
.btn-add:hover { border-color: var(--accent); color: var(--accent); }
.btn-delete {
  margin-top: 16px;
  width: 100%;
  border: 1px solid var(--danger);
  color: var(--danger);
  background: #fff;
  border-radius: 7px;
  padding: 8px;
  cursor: pointer;
  font-size: 13px;
}
.btn-delete:hover { background: var(--danger); color: #fff; }
.endpoint-info { font-size: 12px; color: var(--muted); background: var(--bg); border-radius: 7px; padding: 8px; margin-bottom: 8px; }
.endpoint-info b { color: var(--text); }

/* --- Přihlašovací obrazovka --- */
#login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1f2733, #2d3f57);
}
.login-card {
  background: #fff;
  width: 320px;
  max-width: 90vw;
  padding: 28px 26px;
  border-radius: 14px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
  text-align: center;
}
.login-logo { font-size: 26px; font-weight: 700; margin-bottom: 4px; }
#login-subtitle { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.login-field { text-align: left; margin-bottom: 12px; }
.login-field label { display: block; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 4px; }
.login-field input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 15px;
  font-family: inherit;
}
.login-field input:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
#login-submit {
  width: 100%;
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 11px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
}
#login-submit:hover { background: #2569b3; }
.login-error { color: var(--danger); font-size: 12.5px; min-height: 18px; margin-bottom: 6px; text-align: left; }
.login-remember { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); margin-top: 12px; justify-content: center; cursor: pointer; }
.login-remember input { cursor: pointer; }
.shake { animation: shake .32s; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-7px); }
  75% { transform: translateX(7px); }
}

/* =====================================================================
   MOBILNÍ / DOTYKOVÝ REŽIM
   ===================================================================== */
#btn-palette-toggle {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 7px;
  padding: 6px 10px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text);
}
#btn-palette-toggle:hover { background: var(--accent-soft); border-color: var(--accent); }
#inspector-close {
  width: 100%;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 7px;
  padding: 8px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
}
#inspector-close:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 820px) {
  .mobile-only { display: inline-flex !important; align-items: center; justify-content: center; }

  /* Horní lišta se zalamuje a zhušťuje */
  #toolbar { flex-wrap: wrap; gap: 6px; padding: 8px 10px; }
  .brand { font-size: 16px; }
  #zoom-label, .save-state, .tools .sep { display: none; }
  .tools { gap: 4px; flex-wrap: wrap; }
  .tools button { padding: 6px 8px; font-size: 12px; }
  .project-bar { order: 6; width: 100%; margin-left: 0; padding-left: 0; border-left: none; }
  #project-select { flex: 1; max-width: none; }

  /* Postranní panely jako vysouvací zásuvky */
  #palette, #inspector {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 40;
    transition: transform .25s ease;
    box-shadow: 0 10px 45px rgba(15, 23, 42, .35);
    width: 82vw;
  }
  #palette { left: 0; max-width: 300px; transform: translateX(-102%); }
  #inspector { right: 0; max-width: 340px; transform: translateX(102%); }
  #palette.open, #inspector.open { transform: translateX(0); }

  #drawer-backdrop.show { display: block; }

  /* Větší dotykové terče */
  .palette-item { padding: 11px 10px; font-size: 14px; }
  .tools button, #btn-palette-toggle { min-height: 34px; }
}

/* Velmi úzké displeje */
@media (max-width: 420px) {
  .brand { font-size: 15px; }
  #palette { width: 88vw; }
  #inspector { width: 90vw; }
}

/* =====================================================================
   VLASTNÍ TYPY – tlačítka v paletě + modální formulář
   ===================================================================== */
.palette-item-label { flex: 1; }
.palette-del {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 4px;
  border-radius: 5px;
  line-height: 1;
}
.palette-del:hover { background: #fdecec; color: var(--danger); }

.palette-add {
  margin-top: 6px;
  border: 1px dashed var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 8px;
  width: 100%;
  cursor: pointer;
  font-size: 12.5px;
  color: var(--muted);
}
.palette-add:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, .45);
  padding: 16px;
}
.modal-card {
  background: #fff;
  width: 340px;
  max-width: 92vw;
  max-height: 90vh;
  overflow-y: auto;
  border-radius: 14px;
  padding: 20px 22px;
  box-shadow: 0 20px 55px rgba(0, 0, 0, .35);
}
.modal-card h2 { margin: 0 0 16px; font-size: 17px; }
.icon-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.icon-row input { border: 1px solid var(--border); border-radius: 7px; padding: 4px; }
.icon-pick {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 7px;
  width: 32px; height: 32px;
  font-size: 17px;
  cursor: pointer;
  line-height: 1;
}
.icon-pick:hover { border-color: var(--accent); background: var(--accent-soft); }
.modal-actions { display: flex; gap: 8px; margin-top: 18px; }
.modal-actions button { flex: 1; border-radius: 8px; padding: 10px; font-size: 14px; cursor: pointer; }
.btn-cancel { border: 1px solid var(--border); background: #fff; color: var(--text); }
.btn-cancel:hover { background: var(--bg); }
.btn-primary { border: none; background: var(--accent); color: #fff; font-weight: 600; }
.btn-primary:hover { background: #2569b3; }

/* Ovladač velikosti zařízení v panelu */
.size-row { display: flex; align-items: center; gap: 10px; }
.size-row input[type="range"] { flex: 1; }
.size-pct { font-size: 12px; color: var(--muted); min-width: 42px; text-align: right; }