:root{color-scheme:light dark;--bg: light-dark(#f5f5f5, #1e1e1e);--surface: light-dark(#ffffff, #2b2b2b);--surface-muted: light-dark(#f0f0f0, #333333);--chrome: light-dark(#eceff1, #2b2b2b);--chrome-text: light-dark(#222222, #e8e8e8);--text: light-dark(#222222, #e8e8e8);--text-muted: light-dark(#555555, #a0a0a0);--border: light-dark(#cccccc, #555555);--border-subtle: light-dark(#e0e0e0, #444444);--accent: light-dark(#2e7d32, #66bb6a);--accent-contrast: light-dark(#ffffff, #122016);--danger: light-dark(#c62828, #ef5350);--danger-contrast: #ffffff;--secondary: light-dark(#546e7a, #78909c);--secondary-contrast: #ffffff;--focus-ring: light-dark(#1565c0, #90caf9);--link: light-dark(#1565c0, #90caf9);--overlay: light-dark(rgba(0, 0, 0, .45), rgba(0, 0, 0, .65));--grid-header: light-dark(#e8e8e8, #3a3a3a);--grid-header-strong: light-dark(#d0d0d0, #454545);--grid-corner: light-dark(#cfcfcf, #4a4a4a);--grid-weekend: light-dark(#f0f4f7, #2f3538);--grid-weekend-header: light-dark(#cfd8dc, #3d474c);--grid-row-name: light-dark(#f5f5f5, #323232);--grid-group: light-dark(#37474f, #1a1a1a);--grid-group-text: light-dark(#ffffff, #e8e8e8);--selection: light-dark(#ffe082, #6d5a1a);--on-data: #111111;--radius: 6px;--space-1: 4px;--space-2: 8px;--space-3: 16px;--space-4: 24px;--name-width: 180px;--cell-width: 26px;--cell-height: 26px;--header-height: 22px;--font: "Segoe UI", system-ui, sans-serif}html[data-theme=light]{color-scheme:light}html[data-theme=dark]{color-scheme:dark}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text)}.hidden{display:none!important}.screen{min-height:100vh}:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-1);min-height:32px;padding:var(--space-1) var(--space-2);border:none;border-radius:var(--radius);font:inherit;font-size:13px;cursor:pointer;background:var(--secondary);color:var(--secondary-contrast)}.btn:hover{filter:brightness(1.08)}.btn:disabled{opacity:.5;cursor:not-allowed;filter:none}.btn-primary{background:var(--accent);color:var(--accent-contrast)}.btn-danger{background:var(--danger);color:var(--danger-contrast)}.btn-ghost{background:var(--surface-muted);color:var(--text)}.btn-sm{min-height:26px;padding:2px 8px;font-size:11px}.input,.field input,.field select,.admin-tab input,.admin-tab select,.login-box input,.row-name-input,.row-group-add input{width:100%;padding:8px;margin:0;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);font:inherit;font-size:13px}#login-screen{display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-box{background:var(--surface);color:var(--text);padding:var(--space-4);border-radius:var(--radius);width:min(320px,92vw);text-align:center;border:1px solid var(--border-subtle)}.login-box h1{margin:0 0 var(--space-3);font-size:1.35rem;font-weight:650}.login-box .field{text-align:left;margin-bottom:var(--space-2)}.login-box .btn{width:100%;margin-top:var(--space-2);min-height:40px}.error{color:var(--danger);font-size:13px;min-height:18px;margin:var(--space-2) 0 0}.login-hint{font-size:12px;color:var(--text-muted);margin:0 0 var(--space-2)}.login-theme-toggle{width:auto;margin-top:var(--space-3)}#toolbar{display:flex;align-items:center;justify-content:space-between;background:var(--chrome);color:var(--chrome-text);padding:var(--space-2) var(--space-3);gap:var(--space-3);flex-wrap:wrap;border-bottom:1px solid var(--border)}#toolbar .btn{background:var(--surface-muted);color:var(--text)}#toolbar .btn:hover{filter:brightness(1.05)}#year-label{font-weight:700;margin:0 var(--space-2);min-width:3ch;text-align:center}.toolbar-left,.toolbar-right{display:flex;align-items:center;gap:var(--space-2)}.toolbar-legend{display:flex;gap:6px;flex-wrap:wrap;font-size:11px;flex:1;justify-content:center}.legend-chip{padding:2px 6px;border-radius:3px;color:var(--on-data);white-space:nowrap;border:1px solid rgba(0,0,0,.2)}#grid-wrapper{background:var(--surface);overflow:hidden}#grid-scroll{position:relative;overflow:auto;height:calc(100vh - 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