:root{--color-bg: #f5f6f8;--color-surface: #ffffff;--color-border: #dde1e6;--color-text: #1d2229;--color-text-muted: #5b6472;--color-primary: #4f6df5;--color-danger: #d1453b;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-text)}h1{font-size:1.5rem;margin:0 0 1rem}h2{font-size:1.1rem;margin:2rem 0 .75rem;color:var(--color-text-muted)}code{font-family:SF Mono,Menlo,Consolas,monospace;font-size:.9em}.app-shell{min-height:100vh;display:flex;flex-direction:column}.top-nav{display:flex;align-items:center;gap:1.5rem;padding:.75rem 1.5rem;background:var(--color-surface);border-bottom:1px solid var(--color-border)}.top-nav__brand{font-weight:700}.top-nav__links{display:flex;gap:.5rem;flex:1}.top-nav__link{padding:.4rem .75rem;border-radius:6px;text-decoration:none;color:var(--color-text-muted);font-weight:500}.top-nav__link:hover{background:var(--color-bg)}.top-nav__link.is-active{background:var(--color-primary);color:#fff}.top-nav__user{display:flex;align-items:center;gap:.75rem;color:var(--color-text-muted);font-size:.9rem}.app-content{flex:1;padding:1.5rem;max-width:1100px;width:100%;margin:0 auto}.page-loading{padding:2rem;color:var(--color-text-muted)}.centered-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.5rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:2rem;max-width:420px;text-align:center}.btn{border:none;border-radius:6px;padding:.55rem 1.1rem;font-size:.95rem;cursor:pointer}.btn--primary{background:var(--color-primary);color:#fff}.btn--primary:disabled{opacity:.6;cursor:default}.btn--ghost{background:transparent;border:1px solid var(--color-border);color:var(--color-text-muted)}.error-text{color:var(--color-danger)}.caveat-text{color:var(--color-text-muted);font-size:.85rem;max-width:480px}.stat-row{display:flex;gap:1rem;flex-wrap:wrap}.stat-block{background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;padding:1.25rem 1.5rem;min-width:160px}.stat-block__value{font-size:2rem;font-weight:700}.stat-block__label{color:var(--color-text-muted);font-size:.85rem;text-transform:uppercase;letter-spacing:.04em}.chart-container{background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;padding:1rem}.page-header-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}.field-inline{display:flex;align-items:center;gap:.5rem;color:var(--color-text-muted);font-size:.9rem}.field-inline select{padding:.35rem .5rem;border-radius:6px;border:1px solid var(--color-border)}.data-table{width:100%;border-collapse:collapse;margin-top:1.5rem;background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;overflow:hidden}.data-table th,.data-table td{text-align:left;padding:.6rem 1rem;border-bottom:1px solid var(--color-border)}.data-table th{color:var(--color-text-muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}.data-table tr:last-child td{border-bottom:none}