:root{--bg:#f5f7fb;--surface:#ffffff;--border:#dee4ee;--text:#16213a;--text-muted:#5b6478;--text-faint:#8a93a6;--primary:#2f6fed;--primary-hover:#2557c4;--primary-soft:#e7f0fe;--primary-contrast:#ffffff;--danger:#dc2626;--danger-soft:#fce8e8;--info:#0891b2;--shadow-md:0 4px 16px rgba(22,33,58,0.08)}*{box-sizing:border-box}body,html{padding:0;margin:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:inherit}.pantalla{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:24px 16px 60px}.marca{font-weight:800;font-size:20px;margin:12px 0 28px;text-align:center}.marca em{color:var(--primary);font-style:normal}.tarjeta{border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:var(--shadow-md)}.tarjeta,.tarjeta-parcial{width:100%;max-width:420px;background:var(--surface)}.tarjeta-parcial{border:1px solid var(--border);border-radius:14px;padding:18px;margin-top:14px}.titulo{font-size:22px;font-weight:800;margin:0 0 4px;text-align:center}.subtitulo{color:var(--text-muted);font-size:14px;text-align:center;margin:0 0 20px}.campo-codigo{width:100%;padding:16px;font-size:22px;letter-spacing:4px;text-align:center;text-transform:uppercase;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--text);margin-bottom:14px}.campo-codigo:focus{outline:2px solid var(--primary);outline-offset:1px}.boton-primario{width:100%;padding:14px;border-radius:999px;border:none;background:var(--primary);color:var(--primary-contrast);font-weight:800;font-size:15px;cursor:pointer}.boton-primario:disabled{opacity:.6;cursor:default}.boton-primario:hover:not(:disabled){background:var(--primary-hover)}.boton-secundario{display:inline-block;margin-top:16px;padding:10px 18px;border-radius:999px;border:1px solid var(--border);background:none;color:var(--text-muted);font-size:13px;font-weight:700;cursor:pointer;text-decoration:none;text-align:center}.error{color:var(--danger);background:var(--danger-soft);border-radius:10px;padding:10px 14px;font-size:13.5px;margin-bottom:14px;text-align:center}.explicacion{color:var(--text-muted);font-size:13px;text-align:center;margin-top:16px;line-height:1.5}.nombre-alumno{font-size:24px;font-weight:800;text-align:center;margin:0 0 2px}.grupo-alumno{color:var(--text-muted);font-size:14px;text-align:center;margin:0 0 24px}.calificacion-grande{font-size:48px;font-weight:800;color:var(--primary);text-align:center;line-height:1}.parcial-encabezado{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.parcial-nombre{font-weight:800;font-size:16px}.parcial-calificacion{font-size:24px;font-weight:800;color:var(--primary)}.categoria{margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}.categoria-encabezado{font-weight:700;font-size:14px;display:flex;justify-content:space-between}.categoria-detalle{font-size:13px;color:var(--text-muted);margin:4px 0 0;padding-left:8px}.categoria-detalle.entregada{color:var(--text)}.asistencia{margin-top:14px;padding-top:12px;border-top:1px solid var(--border);display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--text-muted)}.asistencia strong{color:var(--text)}.actualizado{color:var(--text-faint);font-size:11.5px;text-align:center;margin-top:18px}.centrado{text-align:center;color:var(--text-muted);font-size:14px}