:root{color-scheme:light;--bg: #f4f5f7;--surface: #ffffff;--border: #d9dce1;--text: #1f2430;--text-muted: #616a76;--accent: #2f6fed;--accent-hover: #2559c4;--danger-bg: #fdecea;--danger-text: #9d2b1f;--success-bg: #e8f7ee;--success-text: #1e7a3f;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button{font-family:inherit;cursor:pointer;background:var(--accent);color:#fff;border:none;border-radius:6px;padding:.55rem 1.1rem;font-size:.95rem}button:hover:not(:disabled){background:var(--accent-hover)}button:disabled{opacity:.6;cursor:not-allowed}input,select{font-family:inherit;font-size:.95rem;padding:.5rem .6rem;border:1px solid var(--border);border-radius:6px;width:100%}label{display:flex;flex-direction:column;gap:.3rem;font-size:.9rem;color:var(--text-muted);margin-bottom:.9rem}h1{font-size:1.5rem;margin:0 0 1rem}h2{font-size:1.1rem;margin:0 0 .8rem}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;gap:1.5rem;padding:.8rem 1.5rem;background:var(--surface);border-bottom:1px solid var(--border)}.app-header .brand{font-weight:700;font-size:1.1rem;color:var(--accent)}.app-header nav{display:flex;gap:1.1rem;flex:1}.app-header nav a{color:var(--text-muted);text-decoration:none;font-size:.92rem;padding:.3rem 0;border-bottom:2px solid transparent}.app-header nav a.active{color:var(--text);border-bottom-color:var(--accent)}.user-info{display:flex;align-items:center;gap:.8rem;font-size:.9rem;color:var(--text-muted)}.user-info button{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.app-content{flex:1;padding:1.5rem}.page{max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:1.2rem}.centered-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:1.4rem;max-width:420px;width:100%}.page .card{max-width:none}.error-banner{background:var(--danger-bg);color:var(--danger-text);padding:.6rem .8rem;border-radius:6px;font-size:.9rem;margin-bottom:1rem}.success-banner{background:var(--success-bg);color:var(--success-text);padding:.6rem .8rem;border-radius:6px;font-size:.9rem;margin-bottom:1rem}.data-table{width:100%;border-collapse:collapse;font-size:.9rem}.data-table th,.data-table td{text-align:left;padding:.55rem .6rem;border-bottom:1px solid var(--border)}.data-table th{color:var(--text-muted);font-weight:600}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}.total-tile{display:flex;flex-direction:column;align-items:center;gap:.3rem;max-width:none}.total-number{font-size:2.4rem;font-weight:700;color:var(--accent)}