:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:#1a1a1a;background:#f5f6f8}*{box-sizing:border-box}body{margin:0;min-height:100vh}button{cursor:pointer;border:1px solid #2d6cdf;background:#2d6cdf;color:#fff;border-radius:6px;padding:8px 16px;font-size:1rem}button:disabled{opacity:.6;cursor:default}input,select{display:block;width:100%;padding:8px;margin-top:4px;border:1px solid #ccc;border-radius:6px;font-size:1rem;background:#fff}label{display:block;margin-bottom:16px;font-weight:600}a{color:#2d6cdf}.auth{max-width:360px;margin:8vh auto;padding:24px;background:#fff;border-radius:10px;box-shadow:0 1px 4px #00000014}.dashboard{max-width:960px;margin:24px auto;padding:0 16px}.dashboard header{display:flex;align-items:center;justify-content:space-between}.enrollment code{display:inline-block;word-break:break-all;background:#f0f0f0;padding:4px 8px;border-radius:4px}.enrollment__qr{display:inline-block;background:#fff;padding:8px;border-radius:8px;margin:8px 0}.muted{color:#6b7280;font-size:.85rem}.error{color:#c0392b}pre{background:#fff;border:1px solid #e2e5ea;border-radius:6px;padding:16px;overflow:auto}.app-header{display:flex;align-items:center;gap:24px;padding:16px 24px;background:#fff;border-bottom:1px solid #e2e5ea}.app-header__title{margin:0;font-size:1.15rem}.app-nav{display:flex;gap:16px;flex:1}.app-nav__link{text-decoration:none;color:#6b7280;font-weight:600;padding:4px 0;border-bottom:2px solid transparent}.app-nav__link.is-active{color:#2d6cdf;border-bottom-color:#2d6cdf}.app-main{max-width:960px;margin:24px auto;padding:0 16px}.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:6px;padding:8px 16px;font-size:1rem;font-weight:600;cursor:pointer}.btn:disabled{opacity:.6;cursor:default}.btn--primary{background:#2d6cdf;border-color:#2d6cdf;color:#fff}.btn--danger{background:#c0392b;border-color:#c0392b;color:#fff}.btn--ghost{background:transparent;border-color:#e2e5ea;color:#1a1a1a}.spinner{display:inline-block;width:1em;height:1em;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spinner-rotate .6s linear infinite;vertical-align:-.15em}.loading{display:inline-flex;align-items:center;gap:8px;color:#6b7280}@keyframes spinner-rotate{to{transform:rotate(360deg)}}.alert{border:1px solid #e2e5ea;border-radius:8px;padding:8px 16px;margin:16px 0}.alert--error{border-color:#c0392b;background:#c0392b0f;color:#c0392b}.alert--success{border-color:#1e7e44;background:#1e7e440f;color:#1e7e44}.alert--info{border-color:#2d6cdf;background:#2d6cdf0f;color:#2357b8}.field{display:block;margin-bottom:16px}.field__label{display:block;font-weight:600;margin-bottom:4px}.field__error{margin-top:4px;color:#c0392b;font-size:.85rem}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.75rem;font-weight:600;line-height:1.6;background:#e2e5ea;color:#1a1a1a}.badge--primary{background:#2d6cdf1f;color:#2357b8}.badge--success{background:#1e7e441f;color:#1e7e44}.badge--danger{background:#c0392b1f;color:#c0392b}.badge--muted{background:#e2e5ea;color:#6b7280}.table{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e2e5ea;border-radius:8px;overflow:hidden}.table th,.table td{text-align:left;padding:8px 16px;border-bottom:1px solid #e2e5ea}.table th{background:#f5f6f8;font-weight:600}.table tbody tr:last-child td{border-bottom:none}.table__clickable tbody tr{cursor:pointer}.table__clickable tbody tr:hover{background:#2d6cdf0a}.table__empty{padding:24px;text-align:center;color:#6b7280}.card{background:#fff;border:1px solid #e2e5ea;border-radius:8px;padding:16px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}.stat-card__value{font-size:2rem;font-weight:700;line-height:1.1}.stat-card__label{margin-top:4px;color:#6b7280;font-size:.85rem}.page-section{margin-bottom:24px}.page-section__header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:8px}.page-section__header h2{margin:0;font-size:1.05rem}.dl{display:grid;grid-template-columns:max-content 1fr;gap:4px 16px;margin:0}.dl dt{color:#6b7280}.dl dd{margin:0}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.modal__backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;padding:16px;z-index:1000}.modal__dialog{background:#fff;border-radius:8px;width:100%;max-width:440px;box-shadow:0 8px 30px #0003}.modal__header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid #e2e5ea}.modal__header h2{margin:0;font-size:1.1rem}.modal__close{background:transparent;border:none;color:#6b7280;font-size:1.25rem;line-height:1;padding:4px}.modal__body{padding:16px}.modal__footer{display:flex;justify-content:flex-end;gap:8px;padding:16px;border-top:1px solid #e2e5ea}