:root {
      --signal: #C59D39;
      --node: #151413;
      --warm-grey: #7E7570;
      --beige: #E3D6BB;
      --light-gold: #EFCB6D;
      --charcoal: #443F3A;
      --white: #FFFFFF;

      --bg: #F7F1E4;
      --card: #FFFFFF;
      --card-soft: #FBF7ED;
      --text: var(--node);
      --muted: var(--warm-grey);
      --accent: var(--signal);
      --accent-hover: #9f7f2d;
      --danger: #A33A2F;
      --grid: rgba(68, 63, 58, 0.22);
      --grid-soft: rgba(68, 63, 58, 0.11);
      --shadow: 0 24px 70px rgba(21, 20, 19, 0.13);
      --font: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      --headline-font: "Poppins", "Inter", system-ui, sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }

    body {
      font-family: var(--font);
      background:
        radial-gradient(circle at top left, rgba(197, 157, 57, 0.20), transparent 34rem),
        linear-gradient(135deg, var(--white) 0%, var(--bg) 58%, var(--beige) 100%);
      color: var(--text);
      line-height: 1.5;
      padding: 2rem 1rem;
      min-height: 100vh;
    }

    .container {
      width: 90vw;
      max-width: none;
      margin: 0 auto;
    }

    header {
      position: relative;
      margin-bottom: 1.5rem;
      background:
        linear-gradient(135deg, rgba(21, 20, 19, 0.96), rgba(68, 63, 58, 0.94)),
        var(--node);
      color: var(--white);
      border: 1px solid rgba(239, 203, 109, 0.20);
      border-radius: 18px;
      padding: clamp(1.25rem, 4vw, 2.25rem);
      overflow: hidden;
      box-shadow: 0 18px 50px rgba(21, 20, 19, 0.16);
    }

    header::before,
    header::after {
      content: "";
      position: absolute;
      pointer-events: none;
    }

    header::before {
      inset: 0;
      background:
        radial-gradient(circle at 85% 18%, rgba(239, 203, 109, 0.22), transparent 18rem),
        linear-gradient(90deg, rgba(197, 157, 57, 0.14), transparent 38%);
      opacity: 0.9;
    }

    header::after {
      width: calc(100% - 2.5rem);
      height: 1px;
      left: 1.25rem;
      bottom: 1.05rem;
      background: linear-gradient(90deg, transparent, rgba(239, 203, 109, 0.50), transparent);
      opacity: 0.75;
    }

    .brand-header-content {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(190px, 280px) minmax(0, 1fr);
      gap: clamp(1rem, 3vw, 2rem);
      align-items: center;
    }

    .brand-logo-card {
      min-height: 100px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 0;
    }

    .brand-logo {
      display: block;
      width: min(100%, 250px);
      height: auto;
    }

    .brand-kicker, .eyebrow {
      color: var(--signal);
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      margin-bottom: 0.55rem;
    }

    .brand-header-content h1 + .brand-kicker {
      margin-top: 0.85rem;
      font-size: clamp(0.88rem, 1.2vw, 1rem);
    }

    h1, h2, h3 {
      font-family: var(--headline-font);
      font-weight: 700;
    }

    h1 {
      font-size: clamp(2.1rem, 6vw, 4.6rem);
      margin-bottom: 0.35rem;
      line-height: 0.95;
      letter-spacing: -0.055em;
    }

    h2 {
      font-size: clamp(1.5rem, 2.4vw, 2.05rem);
      margin-bottom: 0.35rem;
      letter-spacing: -0.035em;
    }

    h3 {
      font-size: 1rem;
      margin-bottom: 0.6rem;
      color: var(--text);
    }

    .subtitle {
      color: rgba(255, 255, 255, 0.78);
      font-size: clamp(0.98rem, 1.7vw, 1.12rem);
      max-width: 58rem;
    }

    .section-subtitle {
      color: var(--muted);
      font-size: 0.95rem;
      max-width: 70rem;
    }

    .tool-section {
      position: relative;
      background: linear-gradient(180deg, var(--white), var(--card-soft));
      border: 1px solid rgba(68, 63, 58, 0.14);
      border-radius: 18px;
      padding: clamp(1rem, 3vw, 2rem);
      box-shadow: var(--shadow);
      margin-bottom: 1.5rem;
      overflow: hidden;
    }

    .tool-section::before {
      content: "";
      position: absolute;
      inset: 0 0 auto 0;
      height: 5px;
      background: linear-gradient(90deg, var(--signal), var(--light-gold), var(--signal));
    }

    .section-header {
      margin-bottom: 1.2rem;
      padding-bottom: 1rem;
      border-bottom: 2px solid var(--node);
    }

    .controls, .placement-controls, .map-controls, .scale-controls {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
      gap: 1rem;
      margin-bottom: 1.25rem;
      padding: 1.25rem;
      background: rgba(227, 214, 187, 0.32);
      border-radius: 14px;
      border: 1px solid var(--grid);
    }

    .control-block-title {
      grid-column: 1 / -1;
      font-family: var(--headline-font);
      font-weight: 700;
      font-size: 1rem;
      letter-spacing: -0.02em;
      color: var(--charcoal);
      margin-bottom: -0.25rem;
    }

    .input-group {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
    }

    label {
      font-weight: 600;
      font-size: 0.86rem;
      color: var(--muted);
    }

    input, select {
      width: 100%;
      background: var(--white);
      border: 1px solid var(--grid);
      color: var(--text);
      padding: 0.62rem 0.75rem;
      border-radius: 9px;
      font-size: 1rem;
      transition: border 0.2s, box-shadow 0.2s;
    }

    input[type="range"] {
      padding: 0;
      accent-color: var(--signal);
    }

    input:focus, select:focus {
      border-color: var(--accent);
      outline: none;
      box-shadow: 0 0 0 3px rgba(197, 157, 57, 0.20);
    }

    button { font: inherit; }

    .toggle-btn, .action-btn, .mode-btn, .small-btn {
      background: var(--white);
      border: 1px solid var(--grid);
      color: var(--text);
      padding: 0.62rem 1rem;
      border-radius: 9px;
      cursor: pointer;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      transition: all 0.2s;
      min-height: 42px;
    }

    .toggle-btn:hover, .action-btn:hover, .mode-btn:hover, .small-btn:hover {
      border-color: var(--accent);
      background: rgba(197, 157, 57, 0.14);
    }

    .toggle-btn.active, .mode-btn.active, .small-btn.active, .action-btn.primary {
      background: var(--accent);
      border-color: var(--accent);
      color: var(--node);
    }

    .action-btn.primary:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
    }

    .action-btn.warning {
      border-color: rgba(197, 157, 57, 0.55);
    }

    .small-btn {
      min-height: 0;
      padding: 0.42rem 0.65rem;
      font-size: 0.82rem;
      border-radius: 7px;
    }

    .small-btn.danger {
      border-color: rgba(239, 68, 68, 0.7);
      color: #A33A2F;
    }


    button:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    button:disabled:hover {
      background: var(--white);
      border-color: var(--grid);
    }

    .recommend-btn {
      background: var(--node);
      border-color: var(--node);
      color: var(--white);
    }

    .recommend-btn:hover {
      background: var(--charcoal);
      border-color: var(--signal);
    }

    .recommend-btn.loading {
      cursor: progress;
      background: var(--charcoal);
      border-color: var(--signal);
    }

    .button-spinner {
      width: 0.95rem;
      height: 0.95rem;
      border: 2px solid rgba(255, 255, 255, 0.35);
      border-top-color: var(--light-gold);
      border-radius: 50%;
      display: none;
      flex: 0 0 auto;
      animation: recommendation-spin 0.72s linear infinite;
    }

    .recommend-btn.loading .button-spinner {
      display: inline-block;
    }

    @keyframes recommendation-spin {
      to { transform: rotate(360deg); }
    }

    .chart-container {
      position: relative;
      height: 450px;
      margin: 1.2rem 0;
      background: var(--white);
      border-radius: 14px;
      padding: 1rem;
      border: 1px solid var(--grid);
    }

    .legend-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 0.75rem;
      margin-top: 1rem;
    }

    .legend-item {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 0.9rem;
      padding: 0.55rem;
      background: rgba(227, 214, 187, 0.30);
      border: 1px solid rgba(68, 63, 58, 0.10);
      border-radius: 9px;
    }

    .dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      flex-shrink: 0;
    }

    .highlight {
      border: 1px solid var(--signal);
      background: rgba(239, 203, 109, 0.30);
    }

    .note {
      margin-top: 1.2rem;
      font-size: 0.86rem;
      color: var(--muted);
      padding: 0.85rem;
      background: rgba(227, 214, 187, 0.34);
      border-radius: 10px;
      border-left: 4px solid var(--accent);
    }

    .hint {
      color: var(--muted);
      font-size: 0.86rem;
      margin-top: 0.7rem;
    }

    .site-footer {
      margin: 0 0 1rem;
      padding: 1rem;
      color: var(--charcoal);
      font-size: 0.9rem;
      text-align: center;
    }

    .site-footer a {
      color: var(--node);
      font-weight: 800;
      text-decoration-color: var(--signal);
      text-underline-offset: 0.2em;
    }

    .site-footer a:hover {
      color: var(--accent-hover);
    }

    .error-msg {
      color: var(--danger);
      font-size: 0.84rem;
      margin-top: 0.2rem;
      display: none;
    }

    .placement-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      gap: 1rem;
      align-items: start;
    }

    .placement-workspace { min-width: 0; }

    .placement-canvas-wrap {
      position: relative;
      width: 100%;
      max-width: 100%;
      margin-inline: auto;
      background: var(--node);
      border: 1px solid var(--grid);
      border-radius: 14px;
      overflow: hidden;
      touch-action: none;
    }

    #placementCanvas {
      display: block;
      width: 100%;
      height: 560px;
      cursor: crosshair;
      background: var(--node);
    }

    .canvas-toolbar {
      position: sticky;
      top: 0.5rem;
      z-index: 20;
      display: flex;
      flex-wrap: wrap;
      align-items: stretch;
      gap: 0.45rem;
      margin-bottom: 0.75rem;
      padding: 0.45rem;
      background: rgba(247, 245, 239, 0.96);
      border: 1px solid rgba(68, 63, 58, 0.20);
      border-radius: 10px;
      backdrop-filter: blur(12px);
      box-shadow: 0 7px 20px rgba(21, 20, 19, 0.10);
    }

    .toolbar-brand {
      display: none;
      align-items: center;
      justify-content: center;
      align-self: stretch;
      width: 112px;
      min-height: 38px;
      padding: 0.2rem 0.55rem;
      border-right: 1px solid rgba(68, 63, 58, 0.18);
      text-decoration: none;
    }

    .toolbar-logo {
      display: block;
      width: 100%;
      max-height: 28px;
      margin-inline: auto;
      object-fit: contain;
    }

    .toolbar-group {
      display: flex;
      align-items: stretch;
      gap: 2px;
      padding: 0 0.42rem 0 0;
      margin-right: 0.1rem;
      border-right: 1px solid rgba(68, 63, 58, 0.18);
    }

    .toolbar-group:last-child {
      border-right: 0;
      padding-right: 0;
      margin-right: 0;
    }

    .canvas-toolbar .mode-btn,
    .canvas-toolbar .menu-btn,
    .canvas-toolbar .action-btn,
    .canvas-toolbar .small-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 38px;
      height: 38px;
      padding: 0.42rem 0.62rem;
      gap: 0.38rem;
      border-radius: 6px;
      border-color: transparent;
      background: transparent;
      color: var(--charcoal);
      font-size: 0.78rem;
      font-weight: 700;
      white-space: nowrap;
      box-shadow: none;
    }

    .canvas-toolbar .mode-btn:hover,
    .canvas-toolbar .menu-btn:hover,
    .canvas-toolbar .action-btn:hover,
    .canvas-toolbar .small-btn:hover {
      border-color: rgba(68, 63, 58, 0.15);
      background: rgba(197, 157, 57, 0.14);
    }

    .canvas-toolbar .mode-btn.active,
    .canvas-toolbar .menu-btn.active,
    .canvas-toolbar .action-btn.active {
      color: var(--node);
      border-color: rgba(197, 157, 57, 0.72);
      background: rgba(239, 203, 109, 0.78);
      box-shadow: inset 0 -2px 0 rgba(159, 127, 45, 0.45);
    }

    .canvas-toolbar .recommend-btn {
      padding-inline: 0.78rem;
      color: var(--white);
      background: var(--node);
      border-color: var(--node);
    }

    .canvas-toolbar .recommend-btn:hover {
      color: var(--white);
      background: var(--charcoal);
      border-color: var(--signal);
    }

    .toolbar-separator {
      align-self: stretch;
      width: 1px;
      min-height: 32px;
      margin: 0 0.25rem;
      background: rgba(68, 63, 58, 0.24);
    }

    .toolbar-select-field {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      height: 38px;
      padding: 0.25rem 0.45rem;
      border: 1px solid transparent;
      border-radius: 6px;
      color: var(--charcoal);
      background: transparent;
      white-space: nowrap;
    }

    .toolbar-select-field:hover {
      border-color: rgba(68, 63, 58, 0.15);
      background: rgba(197, 157, 57, 0.10);
    }

    .toolbar-select-label {
      font-size: 0.68rem;
      font-weight: 800;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: 0.06em;
    }

    .toolbar-select-field select {
      width: auto;
      min-width: 128px;
      height: 29px;
      padding: 0.25rem 1.6rem 0.25rem 0.45rem;
      border-radius: 5px;
      font-size: 0.74rem;
      font-weight: 700;
      background-color: rgba(255,255,255,0.88);
    }

    .toolbar-icon {
      width: 16px;
      height: 16px;
      flex: 0 0 16px;
      align-self: center;
      stroke: currentColor;
      fill: none;
      stroke-width: 1.8;
      stroke-linecap: round;
      stroke-linejoin: round;
      pointer-events: none;
    }

    .toolbar-button-text {
      line-height: 1;
      pointer-events: none;
    }

    .power-source-pill {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      padding: 0.16rem 0.42rem;
      border: 1px solid rgba(68, 63, 58, 0.18);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.75);
      color: var(--charcoal);
      font-size: 0.72rem;
      font-weight: 800;
    }

    .status-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 0.6rem;
      justify-content: space-between;
      align-items: center;
      font-size: 0.86rem;
      color: var(--muted);
      margin-top: 0.65rem;
      padding: 0.7rem 0.8rem;
      background: rgba(227, 214, 187, 0.30);
      border: 1px solid rgba(68, 63, 58, 0.14);
      border-radius: 10px;
    }

    .heat-legend {
      display: grid;
      grid-template-columns: repeat(8, 1fr);
      gap: 0.35rem;
      margin-top: 0.85rem;
      font-size: 0.78rem;
      font-weight: 800;
      color: var(--white);
      text-align: center;
    }

    .heat-legend span {
      padding: 0.45rem 0.25rem;
      border-radius: 7px;
      text-shadow: 0 1px 2px rgba(0,0,0,0.45);
    }

    .side-panel {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 1rem;
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid var(--grid);
      border-radius: 14px;
      padding: 1rem;
    }

    .panel-section + .panel-section {
      margin-top: 0;
      padding-top: 0;
      border-top: 0;
    }

    .selected-card {
      background: rgba(227, 214, 187, 0.28);
      border: 1px solid rgba(68, 63, 58, 0.16);
      border-radius: 11px;
      padding: 0.85rem;
      margin-bottom: 1rem;
    }

    .selected-card.empty {
      color: var(--muted);
      font-size: 0.9rem;
    }

    .selected-card .mini-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.65rem;
      margin-top: 0.65rem;
    }

    .object-list {
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }

    .object-row {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 0.5rem;
      align-items: center;
      padding: 0.65rem;
      background: rgba(227, 214, 187, 0.22);
      border: 1px solid transparent;
      border-radius: 9px;
    }

    .object-row.selected {
      border-color: var(--signal);
      background: rgba(239, 203, 109, 0.26);
    }

    .object-title {
      font-weight: 800;
      font-size: 0.91rem;
    }

    .object-meta {
      color: var(--muted);
      font-size: 0.79rem;
      margin-top: 0.15rem;
    }

    .map-file-row {
      grid-column: 1 / -1;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.75rem;
    }

    .file-input-label {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0.62rem 1rem;
      border: 1px solid var(--grid);
      border-radius: 9px;
      background: var(--white);
      font-weight: 800;
      color: var(--text);
      cursor: pointer;
    }

    .file-input-label:hover {
      border-color: var(--accent);
      background: rgba(197, 157, 57, 0.14);
    }

    input[type="file"] {
      position: absolute;
      width: 1px;
      height: 1px;
      opacity: 0;
      pointer-events: none;
    }

    .map-name {
      color: var(--muted);
      font-size: 0.9rem;
    }


    .share-url-output {
      min-width: 0;
      font-size: 0.82rem;
      color: var(--muted);
      background: rgba(255, 255, 255, 0.86);
    }


    .calibration-readout {
      color: var(--charcoal);
      font-size: 0.84rem;
      font-weight: 700;
    }

    .checkbox-row {
      flex-direction: row;
      align-items: center;
      gap: 0.65rem;
      padding-top: 1.55rem;
    }

    .checkbox-row input[type="checkbox"] {
      width: 1.05rem;
      height: 1.05rem;
      accent-color: var(--signal);
      flex-shrink: 0;
    }

    .modal-backdrop {
      position: fixed;
      inset: 0;
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem;
      background: rgba(21, 20, 19, 0.58);
    }

    .modal-backdrop[hidden] { display: none; }

    .modal-card {
      width: min(420px, 100%);
      background: var(--white);
      border: 1px solid rgba(197, 157, 57, 0.48);
      border-radius: 16px;
      padding: 1.2rem;
      box-shadow: var(--shadow);
      touch-action: none;
    }

    .modal-card h3 {
      cursor: grab;
      user-select: none;
    }

    .modal-card.dragging h3 {
      cursor: grabbing;
    }

    .modal-copy {
      color: var(--muted);
      font-size: 0.92rem;
      margin-bottom: 1rem;
    }

    .modal-grid {
      display: grid;
      grid-template-columns: 1fr 130px;
      gap: 0.8rem;
    }

    .modal-choice-list {
      display: grid;
      gap: 0.55rem;
      margin: 0.9rem 0 1rem;
    }

    .modal-choice-card {
      display: grid;
      grid-template-columns: auto 1fr;
      gap: 0.65rem;
      align-items: flex-start;
      padding: 0.7rem;
      border: 1px solid rgba(68, 63, 58, 0.18);
      border-radius: 10px;
      background: rgba(227, 214, 187, 0.20);
      color: var(--text);
      cursor: pointer;
    }

    .modal-choice-card:has(input:checked) {
      border-color: rgba(197, 157, 57, 0.78);
      background: rgba(239, 203, 109, 0.24);
    }

    .modal-choice-card input {
      width: auto;
      margin-top: 0.2rem;
      accent-color: var(--signal);
    }

    .modal-choice-card strong,
    .modal-choice-card small {
      display: block;
    }

    .modal-choice-card small {
      color: var(--muted);
      font-size: 0.8rem;
      line-height: 1.35;
      margin-top: 0.12rem;
    }

    .modal-actions {
      display: flex;
      justify-content: flex-end;
      gap: 0.55rem;
      margin-top: 1rem;
    }


    .side-panel {
      display: none;
    }

    .object-popup {
      position: absolute;
      z-index: 30;
      width: min(310px, calc(100% - 24px));
      max-height: calc(100% - 24px);
      overflow: auto;
      background: rgba(255, 255, 255, 0.96);
      border: 1px solid rgba(197, 157, 57, 0.58);
      border-radius: 13px;
      padding: 0.78rem;
      box-shadow: 0 18px 46px rgba(21, 20, 19, 0.24);
      backdrop-filter: blur(8px);
    }

    .object-popup[hidden] {
      display: none;
    }

    .object-popup .popup-title {
      display: flex;
      align-items: start;
      justify-content: space-between;
      gap: 0.75rem;
      margin-bottom: 0.55rem;
      cursor: grab;
      user-select: none;
    }

    .object-popup.dragging .popup-title {
      cursor: grabbing;
    }

    .object-popup .popup-heading {
      font-weight: 900;
      letter-spacing: -0.025em;
      color: var(--node);
    }

    .object-popup .popup-meta {
      color: var(--muted);
      font-size: 0.76rem;
      font-weight: 700;
      margin-top: 0.1rem;
    }

    .object-popup .popup-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.55rem;
    }

    .object-popup .input-group {
      gap: 0.25rem;
    }

    .object-popup label {
      font-size: 0.74rem;
    }

    .object-popup input,
    .object-popup select {
      font-size: 0.86rem;
      padding: 0.48rem 0.55rem;
      border-radius: 7px;
    }

    .power-source-button-row {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 0.35rem;
    }

    .power-source-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 2.35rem;
      border: 1px solid rgba(68, 63, 58, 0.24);
      border-radius: 8px;
      background: var(--white);
      color: var(--charcoal);
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 900;
      line-height: 1;
      box-shadow: inset 0 -2px 0 rgba(68, 63, 58, 0.08);
    }

    .power-source-button:hover,
    .power-source-button.active {
      border-color: rgba(197, 157, 57, 0.78);
      background: rgba(239, 203, 109, 0.24);
      color: var(--node);
    }

    .power-source-button.active {
      box-shadow: inset 0 -3px 0 rgba(197, 157, 57, 0.42);
    }

    .power-source-icon {
      width: 1.15rem;
      height: 1.15rem;
      stroke: currentColor;
      fill: currentColor;
      stroke-width: 1.6;
      stroke-linecap: round;
      stroke-linejoin: round;
      overflow: visible;
    }

    .power-source-unspecified {
      font-size: 1.2rem;
      line-height: 1;
    }

    .object-popup .popup-actions {
      display: flex;
      justify-content: space-between;
      gap: 0.45rem;
      margin-top: 0.65rem;
      flex-wrap: wrap;
    }

    .object-popup .popup-save-action {
      margin-left: auto;
      background: #2F8F4E;
      border-color: #2F8F4E;
      color: var(--white);
    }

    .object-popup .popup-save-action:hover {
      background: #267A41;
      border-color: #267A41;
      color: var(--white);
    }

    .popup-close {
      border: 0;
      background: transparent;
      color: var(--warm-grey);
      cursor: pointer;
      font-weight: 900;
      font-size: 1.1rem;
      line-height: 1;
      padding: 0.1rem;
    }

    .popup-close:hover {
      color: var(--node);
    }

    @media (max-width: 980px) {
      .container { width: min(96vw, 100%); }
      .brand-header-content { grid-template-columns: 1fr; }
      .placement-layout { grid-template-columns: 1fr; }
      .side-panel { order: 2; grid-template-columns: 1fr; }
    }

    @media (max-width: 620px) {
      body { padding: 1rem 0.75rem; }
      .tool-section { padding: 1rem; }
      .controls, .placement-controls, .map-controls, .scale-controls { padding: 0.85rem; }
      .chart-container { height: 350px; }
      #placementCanvas { height: 420px; }
      .heat-legend { grid-template-columns: repeat(4, 1fr); }
      .selected-card .mini-grid { grid-template-columns: 1fr; }
      .share-config-row { grid-template-columns: 1fr; }
      .canvas-toolbar { position: static; }
      .toolbar-group { flex: 1 1 auto; flex-wrap: wrap; }
      .canvas-toolbar .mode-btn,
      .canvas-toolbar .menu-btn,
      .canvas-toolbar .action-btn,
      .canvas-toolbar .small-btn { flex: 1 1 auto; }
    }

    .tool-menu {
      position: relative;
      display: inline-flex;
      align-items: stretch;
    }

    .tool-menu > summary {
      list-style: none;
    }

    .tool-menu > summary::-webkit-details-marker {
      display: none;
    }

    .tool-menu > summary::after {
      content: "▾";
      display: inline-flex;
      align-items: center;
      align-self: center;
      font-size: 0.68rem;
      line-height: 1;
      margin-left: 0.15rem;
    }

    .tool-menu[open] > summary,
    .reference-tool-menu.reference-mode > summary,
    .deterrent-tool-menu.deterrent-mode > summary {
      color: var(--node);
      border-color: rgba(197, 157, 57, 0.72);
      background: rgba(239, 203, 109, 0.78);
      box-shadow: inset 0 -2px 0 rgba(159, 127, 45, 0.45);
    }

    .tool-menu-panel {
      position: absolute;
      top: calc(100% + 0.45rem);
      left: 0;
      z-index: 50;
      min-width: min(88vw, 22rem);
      padding: 0.85rem;
      background: rgba(255, 255, 255, 0.98);
      border: 1px solid rgba(68, 63, 58, 0.20);
      border-radius: 12px;
      box-shadow: 0 18px 45px rgba(21, 20, 19, 0.18);
      display: grid;
      gap: 0.75rem;
      color: var(--text);
    }

    .map-menu-panel {
      min-width: min(92vw, 28rem);
    }

    .reference-menu-panel,
    .deterrent-menu-panel {
      min-width: min(88vw, 18rem);
    }

    .reference-option-btn,
    .deterrent-option-btn {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.8rem;
      width: 100%;
      border: 1px solid rgba(68, 63, 58, 0.18);
      border-radius: 8px;
      padding: 0.55rem 0.65rem;
      background: rgba(255, 255, 255, 0.86);
      color: var(--text);
      cursor: pointer;
      font-weight: 800;
    }

    .reference-option-btn span,
    .deterrent-option-btn span {
      color: var(--muted);
      font-size: 0.78rem;
      font-weight: 700;
      text-align: right;
    }

    .reference-option-btn:hover,
    .reference-option-btn.active,
    .deterrent-option-btn:hover,
    .deterrent-option-btn.active {
      border-color: rgba(197, 157, 57, 0.74);
      background: rgba(239, 203, 109, 0.24);
    }

    .crop-menu-panel {
      min-width: 13rem;
    }

    .map-file-row.compact {
      display: grid;
      grid-template-columns: 1fr;
      gap: 0.6rem;
      align-items: stretch;
    }

    .map-file-row.compact .map-name {
      max-width: 100%;
    }

    .crop-menu-panel .mode-btn,
    .crop-menu-panel .small-btn,
    .map-menu-panel .mode-btn,
    .map-menu-panel .small-btn,
    .reference-menu-panel .small-btn {
      width: 100%;
      justify-content: center;
    }

    @media (max-width: 720px) {
      .tool-menu {
        flex: 1 1 auto;
      }

      .tool-menu > summary {
        width: 100%;
      }

      .tool-menu-panel {
        position: fixed;
        left: 1rem;
        right: 1rem;
        top: auto;
        width: auto;
        min-width: 0;
      }
    }

    .placement-workspace:fullscreen {
      width: 100vw;
      height: 100vh;
      padding: 0.75rem;
      background: linear-gradient(135deg, var(--node), var(--charcoal));
      overflow: auto;
    }

    .placement-workspace:fullscreen .canvas-toolbar {
      top: 0;
      margin-bottom: 0.75rem;
    }

    .placement-workspace:fullscreen .toolbar-brand {
      display: inline-flex;
      width: 128px;
      flex: 0 0 128px;
    }

    .placement-workspace:fullscreen .placement-canvas-wrap {
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    }

    .placement-workspace:fullscreen .status-bar,
    .placement-workspace:fullscreen .note {
      max-width: min(100%, 1200px);
      margin-left: auto;
      margin-right: auto;
    }

    .help-container {
      max-width: 1440px;
    }

    .help-shell {
      display: grid;
      grid-template-columns: minmax(13rem, 18rem) minmax(0, 1fr) minmax(12rem, 16rem);
      gap: clamp(1rem, 2vw, 1.5rem);
      align-items: start;
    }

    .help-sidebar,
    .help-toc {
      position: sticky;
      top: 1rem;
      display: grid;
      gap: 0.45rem;
      padding: 1rem;
      background: rgba(227, 214, 187, 0.26);
      border: 1px solid rgba(68, 63, 58, 0.14);
      border-radius: 14px;
    }

    .help-sidebar nav,
    .help-toc {
      display: grid;
      gap: 0.45rem;
    }

    .help-doc-link,
    .help-toc a {
      color: var(--charcoal);
      text-decoration: none;
      border-radius: 9px;
      padding: 0.52rem 0.65rem;
      font-weight: 700;
      transition: background 0.2s, color 0.2s;
    }

    .help-doc-link:hover,
    .help-doc-link.active,
    .help-toc a:hover {
      color: var(--node);
      background: rgba(239, 203, 109, 0.38);
    }

    .help-article {
      min-width: 0;
      padding: clamp(1rem, 2vw, 1.65rem);
      background: rgba(255, 255, 255, 0.78);
      border: 1px solid rgba(68, 63, 58, 0.12);
      border-radius: 16px;
    }

    .help-article h1,
    .help-article h2,
    .help-article h3,
    .help-article h4,
    .help-article h5,
    .help-article h6 {
      scroll-margin-top: 1rem;
      margin: 1.15rem 0 0.55rem;
      color: var(--node);
    }

    .help-article h1 { margin-top: 0; font-size: clamp(2rem, 4vw, 3.4rem); }
    .help-article p, .help-article ul, .help-article pre { margin-bottom: 1rem; }
    .help-article ul { padding-left: 1.25rem; }
    .help-article a { color: var(--accent-hover); font-weight: 800; }
    .help-article code { padding: 0.12rem 0.28rem; border-radius: 5px; background: rgba(68, 63, 58, 0.10); }
    .help-article pre { overflow-x: auto; padding: 1rem; border-radius: 12px; background: var(--node); color: var(--white); }
    .help-article pre code { padding: 0; background: transparent; color: inherit; }
    .help-article img { display: block; max-width: 100%; height: auto; margin: 1rem 0; border-radius: 14px; box-shadow: 0 14px 38px rgba(21, 20, 19, 0.14); }

    .help-toc .toc-level-1 { font-size: 0.96rem; }
    .help-toc .toc-level-2 { padding-left: 1rem; }
    .help-toc .toc-level-3,
    .help-toc .toc-level-4,
    .help-toc .toc-level-5,
    .help-toc .toc-level-6 { padding-left: 1.8rem; font-size: 0.9rem; color: var(--muted); }

    @media (max-width: 1050px) {
      .help-shell { grid-template-columns: 1fr; }
      .help-sidebar,
      .help-toc { position: static; }
    }

    .section-help-link {
      display: inline-flex;
      align-items: center;
      width: fit-content;
      margin-top: 0.9rem;
      padding: 0.62rem 0.95rem;
      border: 1px solid rgba(197, 157, 57, 0.55);
      border-radius: 999px;
      color: var(--node);
      background: rgba(239, 203, 109, 0.28);
      font-weight: 800;
      text-decoration: none;
      transition: background 0.2s, border-color 0.2s, transform 0.2s;
    }

    .section-help-link:hover {
      background: rgba(239, 203, 109, 0.44);
      border-color: rgba(197, 157, 57, 0.85);
      transform: translateY(-1px);
    }

    .section-header .section-subtitle {
      max-width: none;
    }

    .quick-start-panel {
      width: 100%;
      margin-top: 0.9rem;
      border: 1px solid rgba(68, 63, 58, 0.18);
      border-radius: 14px;
      background: rgba(255, 255, 255, 0.78);
      box-shadow: 0 12px 28px rgba(21, 20, 19, 0.08);
      overflow: hidden;
    }

    .quick-start-panel > summary {
      cursor: pointer;
      padding: 0.85rem 1rem;
      font-family: var(--headline-font);
      font-weight: 700;
      color: var(--node);
      list-style-position: inside;
    }

    .quick-start-panel[open] > summary {
      border-bottom: 1px solid rgba(68, 63, 58, 0.14);
      background: rgba(239, 203, 109, 0.18);
    }

    .quick-start-content {
      display: grid;
      gap: 0.75rem;
      max-height: min(62vh, 42rem);
      overflow: auto;
      padding: 1rem;
    }

    .quick-start-content h2,
    .quick-start-content h3,
    .quick-start-content h4 {
      margin-top: 0.35rem;
      color: var(--node);
    }

    .quick-start-content p,
    .quick-start-content ul {
      margin: 0;
    }

    .quick-start-content ul {
      padding-left: 1.2rem;
    }

    .quick-start-content a {
      color: var(--accent-hover);
      font-weight: 800;
    }

    .quick-start-image-placeholder {
      display: block;
      padding: 0.7rem 0.8rem;
      border: 1px dashed rgba(197, 157, 57, 0.72);
      border-radius: 10px;
      background: rgba(239, 203, 109, 0.16);
      color: var(--charcoal);
      font-weight: 700;
      font-size: 0.9rem;
    }

    .help-image-figure {
      display: flex;
      justify-content: center;
      margin: 1rem 0;
      text-align: center;
    }

    .help-image-figure img {
      display: block;
      width: auto;
      max-width: 100%;
      max-height: min(72vh, 44rem);
      margin-inline: auto;
      object-fit: contain;
    }

    .quick-start-content .help-image-figure {
      margin: 0.35rem 0;
    }

    .quick-start-content .help-image-figure img {
      max-width: min(100%, 32rem);
      max-height: clamp(8rem, 28vh, 18rem);
    }

    .help-image-missing {
      display: block;
      margin-top: 0.5rem;
      padding: 0.7rem 0.8rem;
      border: 1px dashed rgba(197, 157, 57, 0.72);
      border-radius: 10px;
      background: rgba(239, 203, 109, 0.16);
      color: var(--charcoal);
      font-weight: 700;
      font-size: 0.9rem;
    }