:root {
  --accent:     #4a9eff;
  --muted:      #7a9bbf;
  --danger:     #ff7070;
  --warn-bg:    #2a2010;
  --warn-fg:    #ffb347;
  --err-bg:     #2a1212;
  --err-border: #6b2828;
  --secondary:  #2a4a6a;
  --bg-page:    #0d1b2a;
  --bg-card:    #132237;
  --bg-section: #172a43;
  --bg-input:   #0f2035;
  --border:     #1e3a5c;
  --text:       #d8e8f8;
}

* { box-sizing: border-box; font-family: Segoe UI, system-ui, Arial, sans-serif }

body   { margin: 18px; background: var(--bg-page); color: var(--text) }
main   { max-width: 1000px; margin: 0 auto; padding: 18px; background: var(--bg-card); border-radius: 8px; box-shadow: 0 6px 28px rgba(0,0,0,0.45) }
h1     { margin: 0 0 12px }
h3     { margin: 16px 0 6px; font-size: 15px }

/* Page header with help link */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 12px;
  flex-wrap: wrap;
  gap: 8px;
}
.page-header h1 { margin: 0 }
.logo-title {
  display: flex;
  align-items: center;
  gap: 12px;
}
.site-logo {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}
.help-btn {
  display: inline-block;
  background: #e67e22;
  color: #fff;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.help-btn:hover { filter: brightness(1.12) }

.logout-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.logout-btn:hover { color: var(--text); border-color: var(--accent); }

section { margin: 14px 0; padding: 12px; border-radius: 6px; background: var(--bg-section) }

label { display: inline-block; margin-right: 10px; margin-bottom: 6px }

input[type=number] {
  width: 68px;
  padding: 6px;
  margin-left: 6px;
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
}
input[type=number]:focus { outline: 2px solid var(--accent); border-color: var(--accent) }

table  { width: 100%; border-collapse: collapse; margin-top: 8px }
th     { background: #0f2035; color: #9ab8d8; padding: 6px; border-bottom: 1px solid var(--border); text-align: left }
td     { padding: 6px; border-bottom: 1px solid var(--border); text-align: left }
th.col-stackable, td.col-stackable { width: 68px; text-align: center }
th.col-class, td.col-class { width: 54px; text-align: center; color: #9ab8d8; font-size: 0.9em }

.controls { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center }
.enter-hint { font-size: 0.75rem; color: #6a8aaa; margin-left: 2px }

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
button:hover    { filter: brightness(1.12) }
button:active   { filter: brightness(0.88) }
button:disabled { opacity: .35; cursor: default }

button.btn-secondary { background: var(--secondary) }
#compute {
  background: #22c55e;
  color: #fff;
  font-weight: 700;
  padding: 8px 22px;
  font-size: 15px;
}
#compute:hover { filter: brightness(1.1) }
button.btn-danger    { background: #7a2020 }
button.active        { filter: brightness(0.7); outline: 2px solid rgba(255,255,255,0.4) }

/* Preset selector */
.preset-row { margin-bottom: 10px }
.preset-row select {
  padding: 6px 8px;
  margin-left: 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 14px;
  background: var(--bg-input);
  color: var(--text);
}

/* Dim rows */
.dim-row { margin-bottom: 8px }

/* Preset info panel */
.preset-info {
  background: #0f2540;
  border: 1px solid #1e4a7a;
  border-radius: 6px;
  padding: 10px 14px;
  margin: 8px 0;
  font-size: 13px;
}
.preset-info-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 8px;
}
.pi-group    { min-width: 160px }
.pi-label    { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em }
.pi-value    { font-weight: 600; font-size: 14px; color: #a8d4ff }
.pi-notes    { color: #a8c8e8; margin-bottom: 4px }
.pi-disclaimer { color: var(--muted); font-style: italic; font-size: 11px }

/* CDL / Non-CDL toggle inside preset info */
.cdl-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 8px 0;
  padding: 8px 10px;
  background: #0a1e38;
  border: 1px solid #2a5080;
  border-radius: 4px;
}
.cdl-options { display: flex; gap: 18px; flex-wrap: wrap }
.cdl-options label {
  display: flex;
  align-items: center;
  gap: 5px;
  margin: 0;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
}
.cdl-options input[type=radio] { cursor: pointer; accent-color: var(--accent) }

/* Validation errors */
.validation-errors {
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  border-radius: 6px;
  padding: 10px 14px;
  margin-top: 10px;
}
.error-item { color: var(--danger); font-size: 14px; margin: 2px 0 }

/* Warning banner */
.warning {
  color: var(--warn-fg);
  background: var(--warn-bg);
  padding: 6px 10px;
  border-radius: 4px;
  margin: 4px 0;
  font-size: 14px;
}

/* Downsize scope selector */
.downsize-row { margin-top: 10px }
.downsize-row select {
  padding: 6px 8px;
  margin-left: 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 14px;
  background: var(--bg-input);
  color: var(--text);
}

/* Smaller-container suggestion */
.suggestion-box {
  background: #0e2d1e;
  border: 1px solid #2a7a50;
  border-radius: 6px;
  padding: 8px 12px;
  margin: 6px 0 10px;
  font-size: 13px;
  color: #7ae8b0;
}

/* Weight bar */
.weight-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 10px;
  font-size: 13px;
  color: var(--muted);
}
.weight-bar-track {
  flex: 0 0 160px;
  height: 8px;
  background: #0a1825;
  border-radius: 4px;
  overflow: hidden;
}
.weight-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  min-width: 4px;
  transition: width 0.3s;
}

/* Results section */
.results #layers { margin-top: 10px }

/* Three-view diagram layout */
.views-wrap    { display: flex; flex-wrap: wrap; gap: 18px; margin: 12px 0 6px; align-items: flex-start }
.view-block    { display: flex; flex-direction: column }
.view-title    { font-size: 12px; font-weight: 700; color: #a8c8e8; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 2px }
.view-subtitle { font-size: 11px; color: var(--muted); margin-bottom: 5px; max-width: 560px }
.view-canvas   { border: 1px solid var(--border); border-radius: 3px; display: block }

/* Box legend */
.box-legend    { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; align-items: center }
.legend-title  { font-size: 12px; font-weight: 600; color: var(--muted); margin-right: 4px }
.legend-item   { display: flex; align-items: center; gap: 6px; font-size: 12px; background: #0f2035; padding: 4px 8px; border-radius: 4px; cursor: default }
.legend-swatch { width: 13px; height: 13px; border-radius: 3px; border: 1px solid rgba(255,255,255,0.18); flex-shrink: 0 }

/* Export controls */
.export-controls { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center }

/* Print link styled as a button */
a.btn {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  color: #fff;
}
a.btn:hover { filter: brightness(1.12) }
a.btn.btn-secondary { background: var(--secondary) }

.muted { color: var(--muted) }

/* Axle load display */
.axle-wrap       { margin: 4px 0 10px; font-size: 13px }
.axle-cog-label  { color: var(--muted); margin-bottom: 6px }
.axle-row        { display: flex; align-items: center; gap: 8px; margin: 4px 0 }
.axle-name       { width: 94px; flex-shrink: 0; color: var(--muted) }
.axle-bar-track  { flex: 0 0 120px; height: 8px; background: #0a1825; border-radius: 4px; overflow: hidden }
.axle-bar        { height: 100%; background: var(--accent); border-radius: 4px; min-width: 2px; transition: width 0.3s }
.axle-bar.axle-over { background: #ff6b6b }
.axle-nums       { font-size: 12px; color: var(--text) }
.axle-warn       { color: #ff6b6b; font-weight: 600 }

/* 3D preview — responsive base size */
#preview3d { width: 100%; height: 360px }

/* ── Site footer ─────────────────────────────────────────────── */
.site-footer {
  max-width: 1000px;
  margin: 20px auto 0;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.site-footer a           { color: var(--accent); text-decoration: none; white-space: nowrap }
.site-footer a:hover     { text-decoration: underline }
.footer-logo             { width: 16px; height: 16px; border-radius: 3px; flex-shrink: 0 }
.footer-brand            { font-weight: 600; color: var(--text); white-space: nowrap }
.footer-sep              { color: var(--border); user-select: none }

/* ── Mobile: cargo table → card layout ─────────────────────── */
@media (max-width: 640px) {
  body { margin: 10px }
  main { padding: 12px }

  h1 { font-size: 1.3rem }

  /* Container setup — stack labels and inputs vertically */
  .preset-row { display: flex; flex-direction: column; gap: 8px }
  .preset-row label { display: flex; justify-content: space-between; align-items: center; margin: 0 }
  .preset-row label select { flex: 1; max-width: 55%; margin-left: 8px }

  .dim-row { display: flex; flex-direction: column; gap: 8px }
  .dim-row label { display: flex; justify-content: space-between; align-items: center; margin: 0 }
  .dim-row label input[type=number],
  .dim-row label select { width: 48%; margin-left: 0 }

  .rotation-options { display: flex; flex-direction: column; gap: 8px }

  .downsize-row label { display: block }
  .downsize-row select { width: 100%; margin-left: 0; margin-top: 6px }

  /* Diagrams — allow horizontal scroll if a canvas exceeds screen width */
  .view-block { max-width: 100%; overflow-x: auto }

  /* 3D preview — shorter on mobile */
  #preview3d { height: 240px }

  /* Prevent any horizontal overflow */
  .boxes { overflow: hidden }

  /* Hide the column headers — labels are shown via ::before */
  #boxes-table thead { display: none }

  #boxes-table,
  #boxes-table tbody { display: block; width: 100% }

  /* Each row becomes a 2-column card */
  #boxes-table tr {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 12px;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-card);
  }

  #boxes-table td {
    display: flex;
    flex-direction: column;
    gap: 4px;
    border: none;
    padding: 0;
  }

  /* Small uppercase label above each field */
  #boxes-table td::before {
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.04em;
  }

  /* Item # — full-width card header */
  #boxes-table td:nth-child(1) {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    font-weight: 700;
    font-size: 14px;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px;
  }
  #boxes-table td:nth-child(1)::before { content: 'Item\00a0' }

  #boxes-table td:nth-child(2)::before { content: 'Length' }
  #boxes-table td:nth-child(3)::before { content: 'Width' }
  #boxes-table td:nth-child(4)::before { content: 'Height' }
  #boxes-table td:nth-child(5)::before { content: 'Qty' }
  #boxes-table td:nth-child(6)::before { content: 'Weight' }
  /* Stackable — full-width row with inline label + checkbox */
  #boxes-table td:nth-child(7) {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }
  #boxes-table td:nth-child(7)::before { content: 'Stackable' }
  #boxes-table td.col-stackable { text-align: left }
  #boxes-table td:nth-child(8)::before { content: 'LTL Class' }

  /* Remove button — full width */
  #boxes-table td:nth-child(9) { grid-column: 1 / -1 }
  #boxes-table .remove-btn { width: 100% }

  /* Inputs fill their cell */
  #boxes-table td input[type=number] {
    width: 100%;
    margin-left: 0;
  }

  /* Select fills its cell */
  #boxes-table td select { width: 100% }
}

/* ── License gate modal ─────────────────────────────────────────── */
.license-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.license-modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 40px 36px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  box-shadow: 0 12px 48px rgba(0,0,0,0.6);
}

.license-logo {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
}

.license-modal h2 {
  margin: 0 0 8px;
  font-size: 20px;
  color: var(--text);
}

.license-subtitle {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 24px;
}

.license-modal input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  font-family: monospace;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.license-modal input:focus {
  outline: none;
  border-color: var(--accent);
}

.license-error {
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  color: var(--danger);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 12px;
  margin-bottom: 12px;
  text-align: left;
}

.license-modal button {
  width: 100%;
  padding: 11px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.04em;
}

.license-modal button:hover:not(:disabled) { filter: brightness(1.12) }
.license-modal button:disabled { opacity: 0.6; cursor: not-allowed }

.license-footer {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--muted);
}

.license-footer a { color: var(--accent) }

/* ── Cloud jobs modal ────────────────────────────────────────────── */
.jobs-modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 90%;
  max-width: 540px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 12px 48px rgba(0,0,0,0.6);
}
.jobs-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.jobs-modal-title { font-size: 15px; font-weight: 700; color: var(--text) }
.jobs-modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 20px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
.jobs-modal-close:hover { color: var(--text) }
.jobs-list {
  overflow-y: auto;
  flex: 1;
  padding: 12px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.jobs-loading { color: var(--muted); font-size: 13px; padding: 12px 0 }
.jobs-empty   { color: var(--muted); font-size: 13px; padding: 12px 0 }
.jobs-save-row {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}
.jobs-name-input {
  flex: 1;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
}
.jobs-name-input:focus { outline: none; border-color: var(--accent) }
.jobs-save-action {
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}
.jobs-save-action:hover { filter: brightness(1.12) }
.jobs-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.jobs-item-info { display: flex; flex-direction: column; gap: 2px; min-width: 0 }
.jobs-item-name { font-size: 13px; color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap }
.jobs-item-date { font-size: 11px; color: var(--muted) }
.jobs-item-actions { display: flex; gap: 6px; flex-shrink: 0 }
.jobs-action-load {
  padding: 5px 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}
.jobs-action-load:hover { filter: brightness(1.12) }
.jobs-action-delete {
  padding: 5px 10px;
  background: var(--err-bg);
  color: var(--danger);
  border: 1px solid var(--err-border);
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
}
.jobs-action-delete:hover { filter: brightness(1.15) }
.jobs-error {
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  color: var(--danger);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 12px;
  margin: 0 20px 12px;
  flex-shrink: 0;
}