/* ================= CSS VARIABLES ================= */
:root {
  --square-size:       60px;
  --gap:               8px;
  --v-gap:             40px;
  --warehouse-height:  200px;
  --region-height:     480px;
}

/* ================= GLOBAL & RESET ================= */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  box-sizing: border-box;
}
*, *::before, *::after {
  box-sizing: inherit;
}

/* ================= HEADER & NAV ================= */
.main-header {
  background-color: #232F3E;
  display: flex;
  align-items: center;
  padding: 0.5rem 2rem;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
}
.logo {
  height: 40px;
  margin-right: 1rem;
}
.header-title {
  color: #fff;
  font-size: 1.2rem;
  font-weight: bold;
  margin-right: auto;
}
.nav-btn {
  background-color: #FF9900;
  color: #111;
  border: none;
  border-radius: 5px;
  padding: 0.5rem 1rem;
  margin-left: 0.5rem;
  cursor: pointer;
  font-weight: bold;
}
.nav-btn:hover {
  background-color: #e48f00;
}

/* ================= PAGE & CONTAINERS ================= */
.page-container,
.heatmap-container {
  display: flex;
  flex-direction: column;
  margin-top: 70px; /* height of header */
}
.page-container {
  width: 95%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  background: #fff;
  border-radius: 6px;
}
.heatmap-container {
  height: calc(100vh - 70px);
}

/* ================= FORM STYLES ================= */
.form-input, .form-textarea {
  width: 80%;
  max-width: 400px;
  margin: 1rem auto;
  display: block;
  padding: 1rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}
.big-button {
  background-color: #28a745;
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  margin: 1rem auto;
  display: block;
}
.big-button:hover {
  background-color: #218838;
}
fieldset {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1.5rem;
}
legend {
  font-weight: bold;
}

/* ================= FLOOR SELECTOR ================= */
.floor-selector {
  text-align: center;
  padding: 0.5rem 0;
  background: #fafafa;
  border-bottom: 1px solid #ddd;
}
.floor-selector label {
  margin: 0 1rem;
  font-weight: bold;
  cursor: pointer;
}
.floor-selector input {
  margin-right: 0.25rem;
}

/* ================= HEATMAP SCROLL & ZOOM ================= */
.heatmap-scroll {
  flex: 1;
  overflow: auto;
  position: relative;
}

/* ================= DIAGRAM LAYOUT ================= */
.diagram-container {
  width: calc((var(--square-size) * 83) + (var(--gap) * 82));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--v-gap);
  padding: var(--v-gap);
  box-sizing: border-box;
}

/* Dock-door row */
.dock-row {
  display: flex;
  gap: var(--gap);
  flex-wrap: nowrap;
}
.dock-square {
  width: var(--square-size);
  height: var(--square-size);
  background: #ddd;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: #333;
  user-select: none;
}

/* ================= REGIONS ================= */
.regions-container {
  display: flex;
  width: 100%;
  gap: var(--gap);
}
.region {
  position: relative;
  flex: 1;
  height: var(--region-height);
  border: 2px solid #666;
  border-radius: 4px;
  overflow: hidden;
}
.region-amod    { background: #eef; }
.region-preslam { background: #efe; }
.region-bmod    { background: #fee; }

/* AFE override: line up station squares horizontally */
#region-preslam {
  display: flex !important;
  align-items: center;
  overflow-x: auto;
  overflow-y: hidden;
  flex-wrap: nowrap;
  padding: var(--gap) 0;
}
#region-preslam .station-square {
  position: static;
  flex: 0 0 auto;
  margin: calc(var(--gap)/2);
}

/* ================= CENTER LABEL ================= */
.region .ar-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  white-space: pre-line;
  text-align: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: rgba(0,0,0,0.6);
  pointer-events: none;
}

/* ================= STATION SQUARES ================= */
.region .station-square {
  position: absolute;
  width: var(--square-size);
  height: var(--square-size);
  line-height: var(--square-size);
  text-align: center;
  font-size: 0.75rem;
  color: #111;
  background: #ddd;
  border: 1px solid #aaa;
  border-radius: 4px;
  box-shadow: 1px 1px 3px rgba(0,0,0,0.2);
  cursor: pointer;
  user-select: none;
  transition: background 0.3s;
}

/* ================= WAREHOUSE RECTANGLE ================= */
.warehouse {
  width: calc((var(--square-size) * 83) + (var(--gap) * 82));
  height: var(--warehouse-height);
  background: #ccc;
  border-radius: 6px;
}

/* ================= TOOLTIP ================= */
.tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 8px;
  border-radius: 4px;
  font-size: 0.9rem;
  line-height: 1.2;
  display: none;
  z-index: 2000;
}

/* ================= UTILITY ================= */
.hidden {
  display: none !important;
}