#js-tool-container-column-buckling-calculator .cbk-app { --cbk-accent: #565064; --cbk-accent-ink: #453f52; --cbk-accent-soft: rgba(86,80,100,.07); --cbk-lost: rgba(86,80,100,.16); display: flex; flex-direction: column; gap: 14px; }
html[data-theme="dark"] #js-tool-container-column-buckling-calculator .cbk-app { --cbk-accent: #9a94b8; --cbk-accent-ink: #aaa4c6; --cbk-accent-soft: rgba(154,148,184,.08); --cbk-lost: rgba(154,148,184,.18); }
#js-tool-container-column-buckling-calculator .tb-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; }
#js-tool-container-column-buckling-calculator .tb-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px 20px; }
#js-tool-container-column-buckling-calculator .cbk-outcome { display: flex; flex-direction: column; gap: 16px; }
#js-tool-container-column-buckling-calculator .cbk-preview, #js-tool-container-column-buckling-calculator .cbk-details { display: flex; flex-direction: column; gap: 10px; }
#js-tool-container-column-buckling-calculator .cbk-kicker { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-muted); }
#js-tool-container-column-buckling-calculator .cbk-limit { display: flex; flex-direction: column; gap: 16px; border: 1px solid var(--border-color); border-radius: var(--radius-sm); background: var(--cbk-accent-soft); padding: 18px 20px; min-height: 132px; }
#js-tool-container-column-buckling-calculator .cbk-limit-head { display: flex; flex-direction: column; gap: 8px; }
#js-tool-container-column-buckling-calculator .cbk-hero-row { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
#js-tool-container-column-buckling-calculator .cbk-hero-value { font-size: clamp(1.9rem, 5vw, 2.9rem); font-weight: 700; line-height: 1.05; font-variant-numeric: tabular-nums; color: var(--text-primary); }
#js-tool-container-column-buckling-calculator .cbk-unit { font-size: 1rem; color: var(--text-secondary); }
#js-tool-container-column-buckling-calculator .cbk-hero-note { margin: 0; font-size: 0.86rem; color: var(--text-secondary); line-height: 1.4; }
#js-tool-container-column-buckling-calculator .cbk-hero-chips { display: flex; gap: 8px; flex-wrap: wrap; }
#js-tool-container-column-buckling-calculator .cbk-hero-chips:empty { display: none; }
#js-tool-container-column-buckling-calculator .cbk-chip { font-size: 0.8rem; padding: 3px 10px; border: 1px solid var(--border-color); border-radius: 2px; background: var(--bg-secondary); color: var(--text-secondary); font-variant-numeric: tabular-nums; }
#js-tool-container-column-buckling-calculator .cbk-axis { display: flex; flex-direction: column; gap: 6px; }
#js-tool-container-column-buckling-calculator .cbk-axis-track { position: relative; height: 18px; border: 1px solid var(--text-muted); border-radius: 2px; background: var(--bg-secondary); overflow: hidden; }
#js-tool-container-column-buckling-calculator .cbk-axis-lost { position: absolute; top: 0; bottom: 0; right: 0; display: block; width: 0; background-image: repeating-linear-gradient(45deg, var(--cbk-lost) 0, var(--cbk-lost) 1px, transparent 1px, transparent 6px); }
#js-tool-container-column-buckling-calculator .cbk-axis-phi, #js-tool-container-column-buckling-calculator .cbk-axis-load, #js-tool-container-column-buckling-calculator .cbk-axis-strong { position: absolute; top: 0; bottom: 0; display: block; width: 2px; }
#js-tool-container-column-buckling-calculator .cbk-axis-phi { background: var(--cbk-accent-ink); left: 0; }
#js-tool-container-column-buckling-calculator .cbk-axis-load { background: var(--danger); left: 0; }
#js-tool-container-column-buckling-calculator .cbk-axis-strong { background: var(--text-muted); right: 0; }
#js-tool-container-column-buckling-calculator .cbk-axis-labels { position: relative; display: flex; justify-content: space-between; font-size: 0.74rem; font-family: var(--font-mono); color: var(--text-muted); }
#js-tool-container-column-buckling-calculator .cbk-axis-phil { position: absolute; left: 0; transform: translateX(-50%); color: var(--cbk-accent-ink); }
#js-tool-container-column-buckling-calculator .cbk-axis-legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.74rem; color: var(--text-muted); }
#js-tool-container-column-buckling-calculator .cbk-leg-item { display: inline-flex; align-items: center; gap: 5px; }
#js-tool-container-column-buckling-calculator .tb-swatch { display: inline-block; width: 9px; height: 2px; }
#js-tool-container-column-buckling-calculator .cbk-sw-phi { background: var(--cbk-accent-ink); }
#js-tool-container-column-buckling-calculator .cbk-sw-load { background: var(--danger); }
#js-tool-container-column-buckling-calculator .cbk-sw-lost { background-image: repeating-linear-gradient(45deg, var(--cbk-lost) 0, var(--cbk-lost) 1px, transparent 1px, transparent 4px); height: 9px; }
#js-tool-container-column-buckling-calculator .cbk-hidden { display: none; }
#js-tool-container-column-buckling-calculator .cbk-status { border: 1px solid var(--border-color); border-left: 3px solid var(--border-color); border-radius: 2px; padding: 10px 14px; font-size: 0.9rem; color: var(--text-secondary); }
#js-tool-container-column-buckling-calculator .cbk-status.cbk-ok { border-left-color: var(--success); color: var(--text-primary); }
#js-tool-container-column-buckling-calculator .cbk-status.cbk-warn { border-left-color: var(--warning); color: var(--text-primary); }
#js-tool-container-column-buckling-calculator .cbk-status.cbk-bad { border-left-color: var(--danger); color: var(--text-primary); }
#js-tool-container-column-buckling-calculator .cbk-rows { display: grid; grid-template-columns: 1fr 1fr; column-gap: 26px; }
#js-tool-container-column-buckling-calculator .cbk-row { display: flex; align-items: baseline; gap: 8px; padding: 7px 2px; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; }
#js-tool-container-column-buckling-calculator .cbk-key { flex: none; color: var(--text-secondary); }
#js-tool-container-column-buckling-calculator .cbk-leader { flex: 1 1 auto; display: block; border-bottom: 1px dotted var(--text-muted); transform: translateY(-3px); min-width: 16px; }
#js-tool-container-column-buckling-calculator .cbk-val { flex: none; font-variant-numeric: tabular-nums; font-weight: 600; color: var(--text-primary); }
#js-tool-container-column-buckling-calculator .cbk-canvas-wrap { position: relative; width: 100%; min-height: 240px; aspect-ratio: 16/9; border: 1px solid var(--border-color); border-radius: var(--radius-sm); overflow: hidden; contain: layout; background: var(--bg-secondary); }
#js-tool-container-column-buckling-calculator .cbk-canvas-wrap canvas { display: block; width: 100%; height: 100%; }
#js-tool-container-column-buckling-calculator .cbk-canvas-desc { margin: 0; font-size: 0.84rem; color: var(--text-muted); }
#js-tool-container-column-buckling-calculator .cbk-table-wrap { overflow-x: auto; border: 1px solid var(--border-color); border-radius: var(--radius-sm); }
#js-tool-container-column-buckling-calculator .cbk-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
#js-tool-container-column-buckling-calculator .cbk-table th, #js-tool-container-column-buckling-calculator .cbk-table td { padding: 7px 14px; text-align: right; border-top: 1px solid var(--border-color); font-variant-numeric: tabular-nums; }
#js-tool-container-column-buckling-calculator .cbk-table th:first-child, #js-tool-container-column-buckling-calculator .cbk-table td:first-child { text-align: left; }
#js-tool-container-column-buckling-calculator .cbk-table thead th { border-top: none; background: var(--bg-tertiary); color: var(--text-secondary); font-weight: 600; }
#js-tool-container-column-buckling-calculator .cbk-mu-bar { width: 90px; height: 6px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: 2px; overflow: hidden; margin-left: auto; }
#js-tool-container-column-buckling-calculator .cbk-mu-fill { display: block; height: 100%; background: var(--cbk-accent); opacity: .8; }
#js-tool-container-column-buckling-calculator .cbk-mu-cur td { outline: 2px solid var(--cbk-accent); outline-offset: -2px; background: var(--cbk-accent-soft); font-weight: 600; }
@media (max-width: 640px) {
  #js-tool-container-column-buckling-calculator .cbk-app { gap: 10px; }
  #js-tool-container-column-buckling-calculator .tb-grid-2, #js-tool-container-column-buckling-calculator .tb-grid-3 { grid-template-columns: 1fr; }
  #js-tool-container-column-buckling-calculator .cbk-rows { grid-template-columns: 1fr; }
  #js-tool-container-column-buckling-calculator .cbk-outcome { gap: 12px; }
  #js-tool-container-column-buckling-calculator .cbk-canvas-wrap { aspect-ratio: 4/3; }
}