:root{--ink:#1a1a2e;--muted:#707085;--orange:var(--zk-accent,#2267e8);--border:#d6dae8;--bg:#f0f2f8}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;font-family:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink)}
.zb-main{max-width:1180px;margin:0 auto;padding:0 24px 80px}
.zb-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center;padding:48px 0 56px}
.zb-hero-visual{border-radius:8px;overflow:hidden;border:1px solid var(--border);aspect-ratio:1/1;background:var(--bg)}
.zb-hero-visual img{display:block;width:100%;height:100%;object-fit:cover}
.zb-eyebrow{font-size:11px;letter-spacing:1.4px;font-weight:700;color:var(--orange);text-transform:uppercase;margin-bottom:14px}
.zb-hero h1{margin:0 0 16px;font-size:36px;line-height:1.15;letter-spacing:0;white-space:pre-line}
.zb-hero-lead{color:var(--muted);font-size:15px;line-height:1.65;margin:0 0 24px;max-width:520px}
.zb-hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.zb-btn{border-radius:8px;padding:11px 20px;font-size:13px;font-weight:700;text-decoration:none}
.zb-btn.dark{background:var(--ink);color:#fff}
.zb-btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--border)}
.zb-section-head{margin-bottom:20px}
.zb-section-head .zb-eyebrow{display:block;margin-bottom:6px}
.zb-section-head h2{margin:0;font-size:24px;letter-spacing:0}
.zb-section-head p{margin:8px 0 0;color:var(--muted);font-size:13.5px;max-width:640px;line-height:1.6}
.zb-tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:56px}
.zb-tool-card{border:1px solid var(--border);border-radius:8px;padding:20px;text-decoration:none;color:var(--ink);background:var(--bg);display:block;position:relative;min-height:150px;box-sizing:border-box}
.zb-tool-card:hover,.zb-tool-card:focus-visible{border-color:var(--orange);outline:none}
.zb-tool-tag{font-size:10px;color:var(--orange);font-weight:700;text-transform:uppercase;letter-spacing:.4px;display:block;margin:0 24px 8px 0}
.zb-tool-card h3{margin:0 0 8px;font-size:15px;letter-spacing:0}
.zb-tool-card p{margin:0;font-size:12px;color:#5a5a70;line-height:1.55}
.zb-tool-go{position:absolute;top:18px;right:18px;color:var(--orange);font-size:16px}
.zb-cards-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:40px}
.zb-card{border:1px solid var(--border);border-radius:8px;padding:20px;background:#fff;box-sizing:border-box}
.zb-card h3{margin:0 0 8px;font-size:14.5px;letter-spacing:0}
.zb-card p{margin:0;font-size:12.5px;color:#5a5a70;line-height:1.6}
.zb-tool-page{max-width:900px;margin:0 auto;padding:48px 24px 88px}
.zb-tool-page .zb-back{display:inline-flex;color:var(--orange);font-size:12px;font-weight:700;text-decoration:none;margin-bottom:28px}
.zb-tool-page h1{font-size:36px;line-height:1.15;letter-spacing:0;margin:0 0 14px}
.zb-tool-page .zb-tool-intro{font-size:16px;line-height:1.7;color:var(--muted);max-width:680px;margin:0 0 32px}
.zb-workspace{border:1px solid var(--border);border-radius:8px;background:var(--bg);padding:28px}
.zb-workspace h2{font-size:20px;letter-spacing:0;margin:0 0 10px}
.zb-workspace p{font-size:13px;line-height:1.65;color:#5a5a70;margin:0}
.zb-workbench{margin-top:38px}
.zb-workbench-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.zb-workbench-head .zb-eyebrow{margin-bottom:6px}
.zb-workbench-head h2,.zb-history-head h2{font-size:20px;letter-spacing:0;margin:0}
.zb-output-actions,.zb-workbench-actions{display:flex;gap:8px;flex-wrap:wrap}
.zb-workbench-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr);gap:20px;padding:24px 0}
.zb-workbench-form{border:1px solid var(--border);border-radius:8px;padding:20px;background:#fff}
.zb-field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.zb-field{display:flex;flex-direction:column;gap:7px;min-width:0}
.zb-field.wide{grid-column:1/-1}
.zb-field>span{font-size:11px;font-weight:700;text-transform:uppercase;color:#5a5a70}
.zb-field input,.zb-field select,.zb-field textarea{width:100%;box-sizing:border-box;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--ink);font:inherit;font-size:13px;padding:10px 11px;min-height:42px}
.zb-field input[type="color"]{padding:4px;height:42px}
.zb-field textarea{min-height:110px;resize:vertical;line-height:1.5}
.zb-field input:focus,.zb-field select:focus,.zb-field textarea:focus{border-color:var(--orange);outline:2px solid color-mix(in srgb,var(--orange) 18%,transparent);outline-offset:1px}
.zb-workbench-actions{margin-top:20px}
.zb-workbench-actions button{border:0;cursor:pointer}
.zb-workbench-actions .ghost,.zb-output-actions .ghost,.zb-history-head .ghost{border:1px solid var(--border)}
.zb-local-choice{display:flex;align-items:flex-start;gap:9px;margin-top:16px;color:#5a5a70;font-size:12px;line-height:1.45}
.zb-local-choice input{margin-top:2px;accent-color:var(--orange)}
.zb-workbench-status{min-height:20px;margin:10px 0 0;color:var(--orange);font-size:12px;font-weight:700}
.zb-workbench-status[data-error="true"]{color:#a22d35}
.zb-output-panel{border:1px solid var(--border);border-radius:8px;padding:20px;background:var(--bg);min-height:280px;box-sizing:border-box}
.zb-output-label{font-size:10px;color:var(--orange);font-weight:700;text-transform:uppercase;letter-spacing:.4px;margin-bottom:18px}
.zb-output-panel h3{margin:0 0 9px;font-size:18px;letter-spacing:0}
.zb-output-panel p{margin:0 0 16px;color:#5a5a70;font-size:13px;line-height:1.6}
.zb-result-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:18px 0}
.zb-result-metrics>div{border:1px solid var(--border);background:#fff;border-radius:6px;padding:12px;min-width:0}
.zb-result-metrics strong,.zb-result-metrics span{display:block;overflow-wrap:anywhere}
.zb-result-metrics strong{font-size:16px;margin-bottom:4px}
.zb-result-metrics span{font-size:10px;color:var(--muted);text-transform:uppercase}
.zb-result-sections{display:grid;grid-template-columns:minmax(100px,.35fr) minmax(0,1fr);gap:0;margin:16px 0 0;border-top:1px solid var(--border)}
.zb-result-sections dt,.zb-result-sections dd{padding:10px 0;margin:0;border-bottom:1px solid var(--border);font-size:12px;line-height:1.5}
.zb-result-sections dt{font-weight:700;padding-right:14px}.zb-result-sections dd{white-space:pre-wrap;color:#4e4e64;overflow-wrap:anywhere}
.zb-result-list{margin:14px 0 0;padding-left:20px;font-size:13px;line-height:1.7}
.zb-palette{display:grid;grid-template-columns:repeat(5,1fr);height:120px;border-radius:7px;overflow:hidden;border:1px solid var(--border);margin-top:18px}
.zb-palette button{border:0;cursor:pointer;min-width:0}
.zb-pattern{height:240px;border-radius:7px;border:1px solid var(--border);margin-top:18px}
.zb-timer{font-size:48px;line-height:1;font-weight:700;margin:24px 0;letter-spacing:0}
.zb-local-note{display:flex;gap:8px;align-items:baseline;border:1px solid var(--border);border-radius:8px;padding:13px 15px;color:#5a5a70;font-size:12px;line-height:1.5}
.zb-local-note strong{color:var(--ink);white-space:nowrap}
.zb-history-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:32px 0 12px}
.zb-history{display:grid;gap:8px}
.zb-history-item{display:grid;grid-template-columns:1fr 38px;border:1px solid var(--border);border-radius:7px;overflow:hidden;background:#fff}
.zb-history-open,.zb-history-remove{border:0;background:#fff;color:var(--ink);cursor:pointer;text-align:left;padding:11px 13px;font:inherit;font-size:12px}
.zb-history-open:hover{color:var(--orange)}.zb-history-remove{font-size:18px;text-align:center;border-left:1px solid var(--border)}
.zb-empty{color:var(--muted);font-size:12px;margin:0}
@media (max-width:1000px){.zb-hero{grid-template-columns:1fr}.zb-tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.zb-cards-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:900px){.zb-workbench-grid{grid-template-columns:1fr}.zb-output-panel{min-height:220px}}
@media (max-width:640px){.zb-main{padding-inline:18px}.zb-hero{padding-top:32px}.zb-hero h1,.zb-tool-page h1{font-size:30px}.zb-tool-grid,.zb-cards-grid,.zb-field-grid{grid-template-columns:1fr}.zb-tool-card{min-height:0}.zb-field.wide{grid-column:auto}.zb-workbench-head{align-items:flex-start;flex-direction:column}.zb-output-actions{width:100%}.zb-output-actions .zb-btn{flex:1}.zb-result-metrics{grid-template-columns:1fr}.zb-local-note{align-items:flex-start;flex-direction:column}.zb-history-head{align-items:flex-start;flex-direction:column}.zb-timer{font-size:40px}}