:root{--bg: #0d1117;--surface: #161b22;--surface2: #21262d;--border: #30363d;--text: #e6edf3;--muted: #8b949e;--blue: #388bfd;--blue-bg: #1c2d50;--blue-light: #79c0ff;--red: #da3633;--red-bg: #3d1212;--red-light: #ff7b72;--green: #2ea043;--green-bg: #0d3321;--green-light: #3fb950;--amber: #d29922;--purple: #7c3aed}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:13px;height:100vh;overflow:hidden}#root{height:100vh;display:flex;flex-direction:column;overflow:hidden}.header{background:var(--surface);border-bottom:1px solid var(--border);padding:10px 20px;display:flex;align-items:center;gap:12px;flex-shrink:0}.logo{font-size:17px;font-weight:700}.logo em{color:var(--blue);font-style:normal}.header-sep{color:var(--border);font-size:18px}.header-sub{color:var(--muted);font-size:12px}.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}.header-stats{display:flex;gap:8px}.chip{padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;border:1px solid}.chip-gray{background:var(--surface2);color:var(--text);border-color:var(--border)}.chip-green{background:var(--green-bg);color:var(--green-light);border-color:var(--green)}.chip-blue{background:var(--blue-bg);color:var(--blue-light);border-color:var(--blue)}.chip-red{background:var(--red-bg);color:var(--red-light);border-color:var(--red)}.user-info{display:flex;flex-direction:column;align-items:flex-end;font-size:11px;gap:1px}.user-email{color:var(--text);font-weight:500}.user-role{color:var(--muted);font-size:10px;text-transform:uppercase;letter-spacing:.5px}.filters{background:var(--surface);border-bottom:1px solid var(--border);padding:7px 20px;display:flex;gap:6px;align-items:center;flex-shrink:0}.filter-label{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.5px;margin-right:2px}select,input[type=date]{background:var(--surface2);border:1px solid var(--border);color:var(--text);padding:4px 8px;border-radius:6px;font-size:12px;cursor:pointer}select:focus,input[type=date]:focus{outline:none;border-color:var(--blue)}.filter-sep{width:1px;height:18px;background:var(--border);margin:0 4px}.btn-today{margin-left:auto;padding:4px 14px;background:var(--surface2);border:1px solid var(--border);color:var(--muted);border-radius:6px;font-size:12px;cursor:pointer}.btn-today:hover{border-color:var(--blue);color:var(--blue)}.main-content{flex:1;display:grid;grid-template-columns:280px 1fr;overflow:hidden}.machine-tree{background:var(--surface);border-right:1px solid var(--border);overflow-y:auto;overflow-x:hidden}.tree-header{padding:10px 14px;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--surface);z-index:5}.tree-cluster{border-bottom:1px solid var(--border)}.tree-cluster-header{display:flex;align-items:center;gap:6px;padding:8px 12px;cursor:pointer;background:var(--surface2);-webkit-user-select:none;user-select:none;transition:background .1s}.tree-cluster-header:hover{background:#2d333b}.tree-chevron{color:var(--muted);font-size:9px;width:10px;flex-shrink:0;transition:transform .15s}.tree-chevron.open{transform:rotate(0)}.tree-chevron.closed{transform:rotate(-90deg)}.tree-cluster-name{font-weight:600;font-size:12px;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tree-badges{display:flex;gap:3px;flex-shrink:0}.badge{padding:1px 5px;border-radius:3px;font-size:10px;font-weight:700}.badge-nvlink,.badge-infiniband{background:#3b1d91;color:#c4b5fd}.badge-pcie{background:#1a2e1a;color:#6ee7b7}.badge-none{background:var(--surface2);color:var(--muted)}.badge-b200{background:#0c2a5e;color:#93c5fd}.badge-h200{background:#1e1b4b;color:#a5b4fc}.badge-h100{background:#0e3a2f;color:#6ee7b7}.badge-4090,.badge-a100{background:#2d1c00;color:#fbbf24}.badge-eu{background:#1e2a4a;color:#7dd3fc}.badge-us{background:#1a2a1e;color:#86efac}.tree-machine{display:flex;align-items:center;gap:8px;padding:6px 12px 6px 28px;cursor:pointer;transition:background 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var(--border);-webkit-user-select:none;user-select:none}.col-machine-head{position:sticky;left:0;z-index:25;background:var(--surface);width:200px;min-width:200px;padding:8px 12px;border-right:1px solid var(--border);border-bottom:2px solid var(--border);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.col-day{width:64px;min-width:64px;padding:6px 0 4px;text-align:center;border-right:1px solid var(--border)}.col-day.is-today{background:#388bfd14;color:var(--blue)}.col-day.is-weekend{opacity:.55}.day-num{display:block;font-size:15px;font-weight:600;line-height:1.2}.day-name{display:block;font-size:10px;text-transform:uppercase}.tl-cluster-row td{background:var(--surface2);border-bottom:1px solid var(--border)}.tl-cluster-row:hover td{background:#2d333b}.tl-cluster-label{position:sticky;left:0;z-index:10;background:var(--surface2);cursor:pointer;padding:7px 12px;border-right:1px solid var(--border);display:flex;align-items:center;gap:6px}.tl-cluster-row:hover .tl-cluster-label{background:#2d333b}.tl-cluster-name{font-weight:600;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.book-cluster-btn{padding:2px 9px;background:transparent;border:1px solid var(--blue);color:var(--blue);border-radius:4px;font-size:10px;cursor:pointer;flex-shrink:0;margin-left:auto}.book-cluster-btn:hover{background:var(--blue-bg)}.tl-machine-row td{border-bottom:1px solid rgba(48,54,61,.4)}.tl-machine-row.selected td{background:#388bfd0f}.tl-machine-label{position:sticky;left:0;z-index:10;background:var(--bg);padding:6px 12px;border-right:1px solid var(--border);cursor:pointer}.tl-machine-row:hover .tl-machine-label{background:#141a22}.tl-machine-row.selected .tl-machine-label{background:#388bfd14}.tl-machine-id{font-size:11px;font-weight:500;font-family:SF Mono,Consolas,monospace}.tl-machine-ip{font-size:10px;color:var(--muted);font-family:SF 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.block-available{opacity:1}.book-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:24px;height:24px;border-radius:50%;background:var(--surface2);border:1px solid var(--border);color:var(--muted);display:none;align-items:center;justify-content:center;cursor:pointer;font-size:17px;line-height:1;z-index:5}.tl-machine-row:hover .book-btn{display:flex}.book-btn:hover{background:var(--blue);border-color:var(--blue);color:#fff}.tooltip{position:fixed;display:none;background:#2d333b;border:1px solid var(--border);border-radius:8px;padding:10px 14px;font-size:12px;pointer-events:none;z-index:999;max-width:280px;box-shadow:0 4px 24px #00000080}.tooltip.show{display:block}.tt-title{font-weight:600;color:var(--text);margin-bottom:5px}.tt-row{display:flex;gap:6px;margin:2px 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var(--border);display:flex;gap:8px;justify-content:flex-end}.btn{padding:8px 16px;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;border:1px solid transparent;font-family:inherit}.btn-cancel{background:transparent;border-color:var(--border);color:var(--muted)}.btn-cancel:hover{color:var(--text);border-color:var(--muted)}.btn-submit{background:var(--blue);color:#fff}.btn-submit:hover{background:#4d9fff}.btn-submit:disabled{background:var(--surface2);color:var(--muted);border-color:var(--border);cursor:not-allowed}.btn-copy{background:var(--green-bg);color:var(--green-light);border-color:var(--green)}.btn-copy:hover{background:#0e4429}.success-box{background:var(--green-bg);border:1px solid var(--green);border-radius:8px;padding:14px;margin-bottom:14px;text-align:center}.success-title{color:var(--green-light);font-weight:600;margin-bottom:8px}.ssh-cmd{background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:10px;font-family:monospace;font-size:11px;color:var(--muted);word-break:break-all;margin:6px 0}.cluster-book-check{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-size:12px;color:var(--muted)}.cluster-book-check input[type=checkbox]{accent-color:var(--blue)}.admin-toggle{position:fixed;bottom:16px;right:16px;z-index:50;padding:8px 16px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--amber);font-size:12px;font-weight:600;cursor:pointer}.admin-toggle:hover{border-color:var(--amber)}.admin-panel{position:fixed;right:0;top:0;bottom:0;width:420px;background:var(--surface);border-left:1px solid var(--border);z-index:90;overflow-y:auto;box-shadow:-8px 0 30px #0006;transform:translate(100%);transition:transform .2s ease}.admin-panel.open{transform:translate(0)}.admin-panel-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.admin-panel-title{font-size:15px;font-weight:600;color:var(--amber)}.admin-close-btn{background:none;border:none;color:var(--muted);font-size:18px;cursor:pointer}.admin-close-btn:hover{color:var(--text)}.admin-section{padding:16px 20px;border-bottom:1px solid var(--border)}.admin-section-title{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin-bottom:12px}.admin-machine-list{display:flex;flex-direction:column;gap:4px}.admin-machine-entry{display:flex;gap:6px;align-items:center}.admin-machine-entry input{flex:1;min-width:0}.admin-add-machine-btn{margin-top:8px;padding:4px 10px;background:var(--surface2);border:1px dashed 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