.etd{--etd-accent: #a9b4ff;--etd-bg: var(--card-bg, #1b1d22);--etd-bg-2: #17191e;--etd-border: var(--card-border, rgba(255, 255, 255, .1));--etd-text: var(--color-text, #e4e4e4);--etd-text-dim: rgba(228, 228, 228, .65);--etd-bad: #ff8a7e;width:100%;max-width:720px;margin:0 auto;color:var(--etd-text);background:var(--etd-bg);border:1px solid var(--etd-border);border-radius:16px;padding:1.5rem;box-sizing:border-box;font-variant-numeric:tabular-nums}.etd-header{display:flex;justify-content:space-between;align-items:baseline;gap:.75rem;flex-wrap:wrap;margin-bottom:1rem}.etd-title{font-size:1rem;font-weight:600;letter-spacing:.01em;margin:0;color:var(--etd-text)}.etd-presets{display:flex;gap:.4rem;flex-wrap:wrap}.etd-preset-btn{font-size:.75rem;padding:.35rem .6rem;border-radius:999px;border:1px solid var(--etd-border);background:var(--etd-bg-2);color:var(--etd-text-dim);cursor:pointer;transition:border-color .15s ease,color .15s ease}.etd-preset-btn:hover,.etd-preset-btn:focus-visible{border-color:var(--etd-accent);color:var(--etd-text)}.etd-explainer{font-size:.8rem;color:var(--etd-text-dim);line-height:1.5;margin:0 0 1rem}.etd-explainer code{background:var(--etd-bg-2);border:1px solid var(--etd-border);border-radius:4px;padding:.05rem .3rem;font-size:.75rem;color:var(--etd-text)}.etd-solve-toggle{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:1rem}.etd-solve-btn{font-size:.75rem;padding:.4rem .7rem;border-radius:999px;border:1px solid var(--etd-border);background:var(--etd-bg-2);color:var(--etd-text-dim);cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}.etd-solve-btn:hover,.etd-solve-btn:focus-visible{border-color:var(--etd-accent);color:var(--etd-text)}.etd-solve-btn.active{background:var(--etd-accent);color:#14151a;font-weight:600;border-color:var(--etd-accent)}.etd-fields{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1rem}.etd-field{display:flex;flex-direction:column;gap:.35rem}.etd-field label{font-size:.78rem;color:var(--etd-text-dim)}.etd-input-row{display:flex;gap:.5rem}.etd-input{flex:1;min-width:0;background:var(--etd-bg-2);border:1px solid var(--etd-border);border-radius:8px;color:var(--etd-text);font-size:1rem;padding:.5rem .65rem;outline:none;transition:border-color .15s ease}.etd-input:focus{border-color:var(--etd-accent)}.etd-unit-select{background:var(--etd-bg-2);border:1px solid var(--etd-border);border-radius:8px;color:var(--etd-text);font-size:.85rem;padding:.5rem;outline:none;cursor:pointer}.etd-headline-card{background:#a9b4ff14;border:1px solid var(--etd-accent);border-radius:12px;padding:.9rem 1rem;margin-bottom:1.1rem;text-align:center}.etd-headline{font-size:1.1rem;font-weight:700;color:var(--etd-text);margin-bottom:.4rem}.etd-depth-row{display:flex;justify-content:center;gap:1.1rem;flex-wrap:wrap;font-size:1.25rem;font-weight:700;color:var(--etd-text)}.etd-depth-row span:not(:first-child){font-size:.85rem;font-weight:600;color:var(--etd-text-dim);align-self:center}.etd-headline-sub{font-size:.8rem;color:var(--etd-text-dim);margin-top:.4rem}.etd-chart-wrap{background:var(--etd-bg-2);border:1px solid var(--etd-border);border-radius:12px;padding:.75rem .75rem .5rem;margin-bottom:1.1rem}.etd-disk-svg{width:100%;max-width:260px;height:auto;display:block;margin:0 auto;overflow:visible}.etd-curve-svg{width:100%;height:auto;display:block;overflow:visible}.etd-planet-disk{fill:#0a0a0d;stroke:#2a2a33;stroke-width:1}.etd-disk-note{fill:var(--etd-text-dim);font-size:9px;font-style:italic}.etd-chart-gridline{stroke:var(--etd-border);stroke-width:1}.etd-chart-axis-line{stroke:var(--etd-text-dim);stroke-width:1}.etd-chart-axis-label{fill:var(--etd-text-dim);font-size:10px}.etd-ylabel{writing-mode:vertical-rl}.etd-curve-line{fill:none;stroke:var(--etd-accent);stroke-width:2.5;stroke-linejoin:round}.etd-chart-caption{font-size:.72rem;color:var(--etd-text-dim);margin:.35rem 0 0;text-align:center;line-height:1.4}.etd-note{font-size:.78rem;color:var(--etd-text-dim);background:var(--etd-bg-2);border:1px solid var(--etd-border);border-left:3px solid var(--etd-accent);border-radius:8px;padding:.6rem .75rem;line-height:1.45;margin:0 0 1rem}.etd-note--warn{border-left-color:var(--etd-bad)}.etd-footer-row{display:flex;justify-content:flex-end}.etd-copy-btn{font-size:.78rem;padding:.4rem .75rem;border-radius:8px;border:1px solid var(--etd-border);background:var(--etd-bg-2);color:var(--etd-text-dim);cursor:pointer;transition:border-color .15s ease,color .15s ease}.etd-copy-btn:hover,.etd-copy-btn:focus-visible{border-color:var(--etd-accent);color:var(--etd-text)}