:root{--bg: #0f172a;--panel: #ffffff;--ink: #1e293b;--muted: #64748b;--line: #e2e8f0;--brand: #2563eb;--ok-bg: #ecfdf5;--ok-ink: #065f46;--warn-bg: #fffbeb;--warn-ink: #92400e;--err-bg: #fef2f2;--err-ink: #991b1b}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:#f1f5f9}.app{max-width:1000px;margin:0 auto;padding:24px 16px 48px}.header h1{margin:0;font-size:26px}.header p{margin:4px 0 20px;color:var(--muted)}.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media (max-width: 760px){.cols{grid-template-columns:1fr}}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px}.card h2{margin:0 0 12px;font-size:16px}.card h3{margin:20px 0 8px;font-size:14px;color:var(--muted)}.tree{list-style:none;margin:0;padding-left:14px}.tree .tree{border-left:1px dashed var(--line)}.node{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px;padding:5px 8px;border-radius:8px;margin:2px 0}.node__code{font-family:ui-monospace,monospace;font-size:12px;color:var(--muted);min-width:96px}.node__name{font-weight:600;font-size:14px}.node__meta{font-size:12px;color:var(--brand)}.node--building>.node__name,.node--building{font-weight:700}.node--clickable{cursor:pointer}.node--clickable:hover{background:#f8fafc}.node--selected{background:#eff6ff;outline:1px solid var(--brand)}.hint{font-size:13px;color:var(--muted);margin:0 0 12px}.form{display:flex;flex-direction:column;gap:10px}.form label{display:flex;flex-direction:column;gap:4px;font-size:13px;font-weight:600}.form input,.form select{padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-weight:400}.row{display:flex;gap:10px}.row label{flex:1}.actions{display:flex;gap:10px;margin-top:6px}.btn{padding:9px 14px;border-radius:8px;border:1px solid var(--line);cursor:pointer;font-size:14px;font-weight:600}.btn--primary{background:var(--brand);color:#fff;border-color:var(--brand)}.btn--ghost{background:#fff;color:var(--ink)}.btn:disabled{opacity:.6;cursor:default}.result{margin-top:12px;padding:10px 12px;border-radius:8px;font-size:13px}.result--ok{background:var(--ok-bg);color:var(--ok-ink)}.result--warn{background:var(--warn-bg);color:var(--warn-ink)}.result--err{background:var(--err-bg);color:var(--err-ink)}.banner{padding:10px 14px;border-radius:8px;margin-bottom:16px;font-size:14px}.banner--err{background:var(--err-bg);color:var(--err-ink)}.muted{color:var(--muted);font-size:13px}.bookings{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.bookings li{font-size:13px;padding:6px 0;border-bottom:1px solid var(--line)}.tag{font-size:11px;font-weight:700;padding:2px 6px;border-radius:5px}.tag--confirmed{background:var(--ok-bg);color:var(--ok-ink)}.tag--cancelled{background:var(--err-bg);color:var(--err-ink)}