*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--charcoal:#1c1c1e;--gold:#c9a84c;--gold-light:#e8d5a3;--off-white:#f5f5f0;--white:#fff;--amber:#f59e0b;--green:#10b981;--red:#ef4444;--text-muted:#6b7280;--border:#e5e4e0;--radius:12px;--shadow:0 2px 16px #00000014}body{background:var(--off-white);color:var(--charcoal);font-family:system-ui,-apple-system,sans-serif}.app-shell{max-width:860px;margin:0 auto;padding:24px}.app-header{border-bottom:2px solid var(--gold);align-items:center;gap:12px;margin-bottom:32px;padding-bottom:16px;display:flex}.amp-wordmark{letter-spacing:.2em;color:var(--gold);text-transform:uppercase;font-size:11px;font-weight:700}.app-header h1{color:var(--charcoal);font-size:18px;font-weight:500}.step-nav{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;gap:0;margin-bottom:40px;display:flex;overflow:hidden}.step-pip{border-right:1px solid var(--border);color:var(--text-muted);flex:1;align-items:center;gap:8px;padding:14px 16px;font-size:13px;transition:all .2s;display:flex}.step-pip.active{background:var(--charcoal);color:#fff}.step-pip.done{color:var(--gold)}.pip-num{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:11px;font-weight:700;display:flex}.step-pip.active .pip-num{background:var(--gold);color:var(--charcoal)}.step-pip.done .pip-num{background:var(--gold-light);color:var(--charcoal)}.step-pip:not(.active):not(.done) .pip-num{background:var(--border);color:var(--text-muted)}.step-body{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;padding:32px}.step-title{margin-bottom:6px;font-size:22px;font-weight:600}.step-subtitle{color:var(--text-muted);margin-bottom:28px;font-size:14px}.form-group{margin-bottom:20px}.form-group label{color:var(--charcoal);margin-bottom:6px;font-size:13px;font-weight:500;display:block}.hint{color:var(--text-muted);margin-top:4px;font-size:12px}select,input[type=number]{border:1px solid 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.amount{color:var(--charcoal);margin-top:4px;font-size:28px;font-weight:700}.slider-group{margin-bottom:24px}.slider-label-row{justify-content:space-between;margin-bottom:6px;font-size:13px;display:flex}input[type=range]{width:100%;accent-color:var(--gold);cursor:pointer}.tier-mix-group{background:var(--off-white);border-radius:8px;margin-bottom:20px;padding:16px}.tier-total{color:var(--text-muted);margin-top:8px;font-size:12px}.tier-total.error{color:var(--red)}.advanced-toggle{color:var(--gold);cursor:pointer;background:0 0;border:none;margin-bottom:16px;padding:0;font-size:12px}.advanced-toggle:hover{text-decoration:underline}.advanced-panel{background:var(--off-white);border-radius:8px;margin-bottom:20px;padding:16px}.scenarios-grid{grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px;display:grid}.scenario-card{border-radius:var(--radius);border:2px solid #0000;padding:20px}.scenario-card.neutral{border-color:var(--border);background:#fff}.scenario-card.warning{border-color:var(--amber);background:#fffbeb}.scenario-card.success{border-color:var(--green);background:#ecfdf5}.scenario-label{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-bottom:8px;font-size:11px;font-weight:700}.scenario-comp{color:var(--charcoal);margin-bottom:4px;font-size:30px;font-weight:700}.scenario-delta{font-size:14px;font-weight:600}.scenario-delta.pos{color:var(--green)}.scenario-delta.neg{color:var(--red)}.scenario-delta.zero{color:var(--text-muted)}.scenario-desc{color:var(--text-muted);margin-top:8px;font-size:12px;line-height:1.5}.insight-card{background:linear-gradient(135deg, var(--charcoal) 0%, #2d2d30 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12px}.cell-pos{color:#065f46;background:#ecfdf5;font-weight:600}.cell-neg{color:#991b1b;background:#fef2f2;font-weight:600}.cell-zero{color:var(--text-muted)}.practice-context{background:var(--off-white);border-radius:8px;margin-bottom:24px;padding:16px;font-size:13px}.pc-amount{color:var(--charcoal);font-size:22px;font-weight:700}.results-footer{color:var(--text-muted);text-align:center;margin-top:24px;font-size:11px}.confirm-gate{background:var(--off-white);border-radius:8px;align-items:center;gap:12px;margin:16px 0;padding:16px;display:flex}.tooltip-text{color:var(--text-muted);background:var(--off-white);border-left:3px solid var(--gold);border-radius:6px;margin-top:6px;padding:10px 12px;font-size:12px;line-height:1.5}.editable-row{border-bottom:1px solid var(--border);padding:16px 0}.er-header{justify-content:space-between;align-items:center;margin-bottom:4px;display:flex}.er-label{color:var(--charcoal);font-size:14px;font-weight:600}.er-value-group{align-items:center;gap:10px;display:flex}.er-value{color:var(--charcoal);font-size:20px;font-weight:700}.er-amp-badge{background:var(--gold-light);color:#7a5c1e;letter-spacing:.02em;border-radius:10px;margin-top:2px;padding:3px 9px;font-size:11px;font-weight:600;display:inline-block}.er-pencil{border:1px solid var(--border);cursor:pointer;color:var(--text-muted);background:0 0;border-radius:6px;padding:4px 8px;font-size:13px;line-height:1;transition:all .15s}.er-pencil:hover{border-color:var(--gold);color:var(--charcoal);background:var(--off-white)}.er-edit-input{align-items:center;gap:4px;display:flex}.er-edit-input input{border:2px solid var(--gold);text-align:right;width:72px;box-shadow:0 0 0 3px var(--gold-light);border-radius:6px;outline:none;padding:6px 8px;font-size:16px;font-weight:700}.er-suffix{color:var(--text-muted);font-size:16px;font-weight:600}.tier-edit-row{border-bottom:1px solid var(--border);align-items:center;gap:10px;padding:8px 0;display:flex}.tier-edit-label{flex:1;font-size:14px;font-weight:500}.tier-edit-avg{color:var(--text-muted);margin-right:auto;font-size:12px}.fixed-comp-notice{background:var(--off-white);border-left:4px solid var(--gold);color:var(--charcoal);border-radius:8px;margin-bottom:32px;padding:16px 20px;font-size:14px;line-height:1.6}@media (width<=640px){.scenarios-grid{grid-template-columns:1fr}.step-pip .pip-label{display:none}.app-shell{padding:16px}.step-body{padding:20px}}